US20130146541A1 - Fluid purification methods, devices, and systems - Google Patents
Fluid purification methods, devices, and systems Download PDFInfo
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- US20130146541A1 US20130146541A1 US13/713,767 US201213713767A US2013146541A1 US 20130146541 A1 US20130146541 A1 US 20130146541A1 US 201213713767 A US201213713767 A US 201213713767A US 2013146541 A1 US2013146541 A1 US 2013146541A1
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- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
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- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Definitions
- Electronic deionization is an established method for purification of water by removing ionic solutes.
- EDI uses filter units, hereafter referred to as cells, which have a membrane.
- EDI uses electricity in addition to a membrane to filter material including solutes.
- the membranes of cells can be regenerated electrically and by reverse flushing and are therefore regarded as re-usable.
- the number of regeneration cycles of cell may be limited because of gradual permanent degradation of the membrane of the cell.
- Ionic solutes may be expressed as total dissolved solids (TDS) in parts per million (PPM).
- TDS total dissolved solids
- PPM parts per million
- an EDI cell may be capable of 85% to 95% TDS reduction. Higher levels of purification can be achieved with three or more EDI cells connected in series to achieve a ratio of TDS in the input water to that in the output water as shown in the table below. For example, water containing 1000 ppm TDS may have the TDS reduced at each stage of a series-connected cells as follows.
- EDI cells When an EDI cell is actively removing ions, membranes of the cell are charged with electricity creating anionic and cationic bonding sites. EDI cells require regeneration after a period of time. During regeneration, the polarity on the membranes is reversed and water forced in a reverse direction to push the ions out of the bonding sites and flush the captured ions out of the cell.
- a membrane such as a re-usable membrane
- the service life is a function of the number of regeneration cycles.
- the membrane is exposed to concentrated solutes. Progressive scaling of calcium carbonate and other solutes can occur during the regeneration cycle. As scale forms, the membrane becomes permanently degraded, ultimately requiring replacement.
- Embodiments of the disclosed subject matter relate to fluid purification methods, devices, and systems.
- embodiments of the disclosed subject matter involve multi-cell and multi-stage batch electronic deionization systems, methods, and devices.
- Embodiments include multiple cell, multi-stage purification systems, for example a four-cell, three-stage EDI system is described.
- a predetermined purity is achieved while also optimizing a service interval between the replacements of one or more permanently degraded cells resulting from the system use, including multiple regeneration cycles of the cells in each stage.
- the disclosed subject matter may be adapted to achieve, for example, 99.9% total dissolved solids (TDS) reduction versus only 85% to 95% TDS reduction in a single stage system in which fluid flows through a single stage.
- TDS total dissolved solids
- valves 26 are operated to produce a reverse flow in cell 1 14 to regenerate it while cell 2 16 receives a forward flow to purify the flowing water. Flushed reversed flow is drained through a drain. The flow restrictors 24 and check valves 26 cooperate with the valves to divert some of the purified water to the cell undergoing regeneration by reverse flow. A flow sensor and pressure switch 28 are provided.
- a four-cell, three-stage, system or device can provide a much higher service life than a conventional two-cell single stage system.
- Embodiments include a three-stage system or device comprised or consisting of three paired cells in fixed position. Such a system or device can also achieve about 99.9% TDS reduction.
- FIG. 1 is a block diagram of a two-cell electronic deionization system according to the prior art.
- FIG. 2 is a block diagram of a fluid purification system according to embodiments of the disclosed subject matter.
- FIGS. 3A-3D shows regeneration cycles of respective stages of a four-cell, three-stage electronic deionization system or device according to embodiments of the disclosed subject matter.
- FIG. 4 shows another embodiment in which a cell to be regenerated in a cell of a multi-stage purifier is regenerated while a parallel multi-stage purifier purifies fluid and then the multi-stage purifiers switch for regeneration of the next cell to be regenerated.
- cell may refer to any kind of fluid purification element. Although specific examples are described which employ EDI cells in the context of water purification, it should be understood that the term cell may refer to one or more units that produce a reduction in filterable content of a fluid stream. In the case of EDI embodiments, the cells reduce ionic species as well particulates. Preferably, particulates are substantially removed from the fluid stream prior to passing through an EDI purification system.
- Embodiments described hereinbelow include multi-stage, multi-cell systems.
- each stage of an N-stage system may include one or more cells and the one or more cells will be arranged so that a first stage purifies fluid and outputs purified fluid to a second stage attached to it in a series relationship so that it can further purify the fluid. The series continues until the fluid is purified by an Nth stage.
- Fluid may also flow through cell modules that are arranged within a cell in a parallel relationship in each stage. To simplify discussion, such a stage, having multiple cell modules or filter units in which a flow is divided to flow through separate units, will still be called a “cell” herein.
- the first cell in a series (that is, the first stage, which is receiving fluid from the source to be treated and not from an upstream cell stage) has the greatest filtering load.
- the first cell in the series is always the next cell to be regenerated.
- multiple cells awaiting regeneration may stand by and be regenerated in parallel.
- the second cell in the series has a lighter load because the fluid it receives has a lower amount of material to remove.
- the third cell will have even less filtering load and so on for as many cells as are in the series.
- FIG. 2 is a block diagram of a fluid purification system 101 according to embodiments of the disclosed subject matter.
- the system 101 may be, for example, a water purification plant that generates pure water used for medical treatment, for example, dialysate used in renal replacement therapy.
- the downstream consuming process 116 in such a case, may represent a process that stores pure water to be used later in the preparation of treatment fluids or a proportioning system that adds specific materials such as solutes for preparing treatment fluids such as dialysate.
- Water from a source may be filtered initially by a sediment filter 100 and then pass through a backflow preventer 102 .
- a pump 104 may be included but the system may also operate on source water line pressure, if sufficient.
- the fluid (advantageously, water) from the pump or backflow preventer 104 , 102 may be applied to an EDI purification system 108 , in the present case identified as a 3-stage, 4 cell EDI system powered and controlled by a controller 109 .
- the fluid treated by the EDI system 108 may be further treated by a UV treatment cell 106 which may provide degradation of some chemicals or bio-contaminants.
- a chemical deionization stage including a dual bed 110 and mixed bed 112 stage may further deionize the fluid (again, the system in the principal embodiment is directed to water, so the deionization would be used to deionize water).
- An ultrafiltration stage 114 may be provided for, as in a principal environment, to capture pyrogens and/or infectious particles.
- the consuming process 116 may be any of a variety of consuming processes.
- a drain may receive fluid from a valve 120 that diverts product fluid from the upstream stages to the drain during transient cycles or for testing during startup before a steady state product fluid production cycle begins.
- the EDI system 108 also produces waste water during regeneration of the cells. Note that the EDI system 108 may be replaced with any type of multi-stage multiple element filtration or purification system, where cells other than EDI type cells, whose purification capability can be regenerated, may be used.
- FIGS. 3A-3D shows stages of a four-cell, three-stage EDI system or device according to embodiments of the disclosed subject matter.
- the system shown in FIG. 2 can include the four-cell, three-stage electronic deionization system, for example at 108 as indicated.
- the EDI system of FIGS. 3A-3D may be used in other systems as well or as a stand-alone deionization system.
- the system of FIGS. 3A-3D may also be used with non-EDI purification cells that are regenerated using reverse flow or by other means.
- Embodiments of the disclosed subject matter can include a three-stage electronic deionization system.
- the system or device can include four cells.
- Other embodiments based on a different number of cells are also possible, for example, a two stage system or four or more stages in a system.
- a single cell may include more than one purification unit connected in parallel or series.
- Each of the cells 340 , 342 , 344 , and 346 can be connected and controlled to operate for fluid purification or regeneration.
- fluid flows in a forward direction to produce product fluid; in an embodiment, water flows to produce product water.
- a forward voltage is applied.
- the fluid flows in a reverse direction through the cell and, in the case of an EDI cell, a reverse voltage is applied to the cell undergoing regeneration.
- a controller may apply the voltage and control valves to subject a selected cell to the regeneration and purification modes automatically and for predefined volumes of fluid or time intervals. In addition, the regeneration modes may be triggered my measured levels of contamination in the product fluid.
- the ion concentration of product in water purification embodiments, may be measured using a resistivity sensor and the signal used by the controller to control valves and voltages for the mode establishment as discussed.
- the fluid is water, but other fluids may be used and the cells configured for the purification of other types of fluids, correspondingly.
- the four cells can be inter-connected by tubing and valves, for example, as shown in FIGS. 3A-3D .
- Each cell is shown at 340 , 342 , 344 , and 346 .
- the number of cells may vary in alternative embodiments.
- three of the cells 340 , 342 , 344 , and 346 are connected in series for continuous production of product water.
- the cell 346 is undergoing regeneration and cells 340 , 342 , and 344 are connected in series to produce product water.
- Part of the product water output from the final cell in the series, cell 340 is diverted to reverse flush cell 346 and the resulting waste stream flowed to a drain.
- control valves are set such that valves 302 , 320 , 316 , 314 , 304 , 308 , 312 , 324 , 328 , and 326 are closed while valves 330 , 332 , 310 , 322 , 306 , and 318 are open.
- the dotted lines indicate lines where no flow occurs and the solid lines and arrows indicate that flow is occurring and the direction of the flow in the indicated lines. It can be seen by the arrangement of the flow paths that the identified regenerating and product water flows result as indicated by the solid and dotted lines.
- valves 304 , 314 , 306 , 308 , 312 , 322 , 330 , 320 , 328 , and 318 are closed while valves 302 , 310 , 332 , 324 , 326 , and 316 are open.
- the dotted lines indicate lines where no flow occurs and the solid lines and arrows indicate that flow is occurring and the direction of the flow in the indicated lines. It can be seen by the arrangement of the flow paths that the identified regenerating and product water flows result as indicated by the solid and dotted lines.
- valves 304 , 306 , 310 , 316 , 322 , 324 , 318 , 330 , 320 , and 332 are closed while valves 314 , 302 , 308 , 312 , 326 , and 328 are open.
- the dotted lines indicate lines where no flow occurs and the solid lines and arrows indicate that flow is occurring and the direction of the flow in the indicated lines. It can be seen by the arrangement of the flow paths that the identified regenerating and product water flows result as indicated by the solid and dotted lines.
- valves 302 , 310 , 314 , 318 , 316 , 308 , 326 , 324 , 330 , and 332 are closed while valves 304 , 306 , 312 , 320 , 322 , and 328 are open.
- the dotted lines indicate lines where no flow occurs and the solid lines and arrows indicate that flow is occurring and the direction of the flow in the indicated lines. It can be seen by the arrangement of the flow paths that the identified regenerating and product water flows result as indicated by the solid and dotted lines.
- an alternative arrangement regenerates one member of a series while the other members of the series wait.
- a second series operates while the one is regenerated.
- all of the cells in each series can be suitably arranged in the series so that the most recently regenerated cell is last in the series (so product water comes out of it) and the cell that has been used for the longest time or volume of fluid since regeneration is first in the series.
- FIG. 4 shows such a system where two multi-stage purifiers 218 and 220 each has a 4-stage 4-cell series.
- a cell to be regenerated (for example one in side 218 ) is regenerated while a parallel multi-stage purifier (for the example 220) purifies fluid and then the two multi-stage purifiers switch for regeneration of the next cell in the parallel multi-stage purifier is regenerated.
- the cells may be shifted in order so that the most recently regenerated cell is always last in the series by controlling the valves 271 by the controller 210 .
- the valves 259 through 261 may be operated by controller 210 so that a forward flow goes only to one side at a time while a reverse flow through a respective flow restrictor 24 returns through one of the valves 260 or 262 to the drain 20 with the check valves blocking flow so as to ensure the correct open flow path.
- each series has valves that may be operated by the controller 210 to provide the aforementioned serial arrangement of cells. It may be confirmed that the arrangement of FIG. 4 produces the desirable features of the other embodiments in which the purification load is distributed uniformly among the cells 275 of each multi-stage purifier 218 and 220 . As a result, the cells may be replaced at less frequent intervals, after permanent exhaustion, and may be regenerated automatically.
- the foregoing embodiment of FIG. 4 may have sensors for detecting TDS reduction from source to product as in the foregoing embodiments. As in prior systems, flow sensors and pressure switch 28 , backflow preventers, etc. may be provided.
- each multi-stage purifier may have N cells and but N ⁇ M stages such that M stages are regenerated at a time and the cells ready for regeneration are switched out.
- N ⁇ M stages such that M stages are regenerated at a time and the cells ready for regeneration are switched out.
- three stages may be used in series and one stage left on standby to be switched into the circuit, and the first one to be regenerated switched out to await the next regeneration cycle which occurs when the second cell requiring regeneration is ready for regeneration.
- the valves 271 would be operated to regenerate both cells requiring regeneration in parallel (parallel flow).
- each cell may progress through the following sequence: regeneration->stage three->stage two->stage 1 .
- each cell may progress through the aforementioned sequence such that no two cells are at the same stage at the same time.
- embodiments can include four cells that are controllable so as to operate in a rotating series to support three states of deionization plus a regeneration state.
- One advantage embodiments of the disclosed subject matter provides is increased membrane life. This can be achieved by embodiments of the disclosed subject matter by spreading out usage of the four membranes based on the aforementioned cell operational sequence. That is to say, relative to service life of the membrane, life optimization can be achieved by spreading the service life over four membranes instead of two in a two-cell system.
- a single cell must have an adjacent cell to supply purified water during regeneration.
- a pair of cells can have a service life of 1.0 units of volume, for instance, for a two membrane system. This can limit the interval between membrane exchange to 1.0 units of volume.
- the combination of four cells has a total service life of approximately 1.95 units of volume, for instance, for a four membrane system.
- systems, devices and methods according to embodiments of the disclosed subject matter for instance four membrane systems, can have a service interval between membrane exchange of 1.95 units of volume, or a 95% increase over two-cell systems.
- the increased combined service life of the four membranes is possible because during stage two operation a membrane can be exhausted at 1/10 th the rate of a single-stage system, and a membrane during stage three operation can be exhausted at 1/100 th the rate of a single stage system.
- water may be received at the source at pressure such that the water is conveyed through the valve system using the pressure from the source.
- any of the embodiments may be provided with a pump to convey water.
- any of the above systems may be modified by the inclusion of an arbitrary number of cells.
- Each or any cell in the embodiments may be replaced by one or more separate cells arranged in series or parallel.
- the cells may include any type of filtration or purification device that is capable of being regenerated.
- the cells may include a purification element such as one or more filter membranes, plates such as in an electrostatic precipitator, depth loading medium, inertial separator elements, or any other type of purification element(s).
- the cells are also permanently exhausted after being subjected to multiple regeneration cycles.
- other fluids instead of purifying water, other fluids may be purified and used for processing including non-aqueous solvents, fuels, food products, cleaning fluids, etc.
- the regeneration cycle may be triggered by a measured reduction in TDS or a threshold level of purity in the product stream which may be measured by a suitable sensor, for example, turbidity, conductivity or resistivity, pH, particle counting, optical diffusion, density, thermal conductivity temperature, or other property.
- the regeneration cycle may also be triggered by a predictive algorithm such as a measured volume of purified fluid having passed through since the last cycle or a predetermined time.
- a controller may be suitably configured to implement any of these criteria according to known techniques.
- valves and flow channels may take a variety of different forms depending on the capacity and type of fluid. Examples of configurations are shown, but a variety of different configurations are possible.
- the disclosed subject matter includes a water purification system in which multiple cells are interconnected by a valving network, wherein each of the cells includes at least one purification element, for example, a membrane or other type of contaminant separator.
- a controller is configured to control the valves of the valving network and a source of water is connected to the valving network to provide water to be purified. The water may also be used for regenerating cells so the valving network includes a drain.
- a product water outlet is also provided.
- the controller is configured to, at a first time, generate a reverse flow of water through a first subset of the cells while simultaneously flowing water in a forward direction through two or more cells in a second subset, while connecting the two or more cells in the second in series.
- the two or more cells of the series define a multiple stage purification component that provide purified water using a part of the valving network to conduct the water between the source and the product water outlet.
- the controller is further configured to direct a flow of water from the first subset of the cells to the drain while directing a flow from a last one of the two or more cells connected in series to a product water outlet.
- the cells in the first subset and the cells in the second subset are mutually exclusive, that is, the cell or cells being regenerated are not used, at the same time, for water purification, so the subsets are disjoint.
- the controller may be further configured to, at a second time, generate a reverse flow of water through a third subset of the cells while simultaneously flowing water in a forward direction through two or more cells in a fourth subset, while connecting the two or more cells in the fourth subset in series.
- the cells in the third subset and the cells in the fourth subset may be mutually exclusive and wherein the cells in the first set and the third set may be mutually exclusive.
- the reverse flow of water may be effective to regenerate the cells.
- the cells may be electronic deionization cells.
- the controller may be configured to apply a reverse voltage to the cells in the first and third subsets at said first and second times, respectively.
- the reverse flow of water may be water from last cell of the second subset in the series of cells which may be thereby purified water.
- the reverse flow of water may be water from last cell of the fourth subset in the series of cells which may be thereby purified water.
- the second and fourth subsets may be interconnected in series such as to produce a 99.9% reduction in total dissolved solids in the water received from the source by the valve network.
- the disclosed subject matter includes a water purification system with multiple cells interconnected by a valving network, wherein each of the cells has a membrane.
- the cells may be EDI cells.
- the controller of the present embodiment is configured to, at regeneration times that can be selected by the controller, select each of the cells in turn to be a currently selected cell to be regenerated and to regenerate it by causing a reverse flow of water therethrough while simultaneously controlling the valves of the valve network to flow water from the source in series through the cells other than the currently selected cell to form a series of cells, the series of cells having a first cell which receives the water from the source and a final cell which provides purified water to the product water outlet.
- the water that reverse flows through the cell being regenerated can come from the cells being used for purification.
- the controller is configured such that, at each of said regeneration times, said each cell may be selected after it has been the first cell in the series of cells at a prior respective time.
- the valve network in this and all the embodiments can have connectors by which the cells can be removed and replaced with new ones as they expire after multiple purification and regeneration cycles.
- the above operations may be repeated may times until the cells expire. This may be done under control of the controller automatically.
- the regeneration cycles may be triggered by time, or an event, for example, the cells may rotated and regenerated as described above whenever the reduction in TDS, for the full series of cells, (i.e., the reduction in TDS from the source water to the product water) falls below a predetermined level.
- the controller may also monitor how much purified water is produced and generate a display to replace the cells manually when, between points where the product water quality falls below the predetermined level, the amount of produced water falls below a predetermined volume.
- the controller may be configured such that the final cell in the series, at a given regeneration time, may be the cell selected to be regenerated at the most recent previous regeneration time.
- Each of the cells in the series may be arranged in order of time since its last turn as the selected cell to be regenerated such that the most recently regenerated cell may be said final cell.
- the product water may be used in the reverse flow of water in any of the embodiments including the present one and the variations of it.
- the series of cells may be selected and arranged in number and/or capacity, so that they are, collectively—in the series—effective to achieve a 99.9% reduction total dissolved solids.
- the cells can be, or include, electronic deionization (EDI) cells.
- the number of cells may be at least three in advantageous embodiments.
- the regeneration times may be selected by the controller responsively to a measurement of water quality at a point in said series.
- Each of the cells in the series may be arranged in order of time (or cumulative treated fluid volume) since its last turn as the selected cell to be regenerated such that the most recently regenerated cell may be said final cell.
- a flow meter may be used, for example, a rate meter or a displaced volume meter.
- the disclosed subject matter includes a fluid purification system with multiple cells interconnected by a valving network, wherein each of the cells has a purification element such as a filter membrane, an EDI membrane, a depth loading filter, an inertial separation filter, an electrostatic precipitator or some other kind of separation element (or a plurality thereof) that removes contaminants or other materials from a fluid stream.
- a purification element such as a filter membrane, an EDI membrane, a depth loading filter, an inertial separation filter, an electrostatic precipitator or some other kind of separation element (or a plurality thereof) that removes contaminants or other materials from a fluid stream.
- the controller is configured to, at regeneration times, select each of the cells in turn to be a currently selected cell to be regenerated and to regenerate it by causing a reverse flow of fluid therethrough while simultaneously controlling the valves of the valve network to flow fluid from the source in series through the cells other than the currently selected cell to form a series of cells, the series of cells having a first cell which receives the fluid from the source and a final cell which provides purified fluid to the product fluid outlet.
- the controller is configured such that, at each of said regeneration times, said each cell may be selected after it has been the first cell in the series of cells at a prior respective time.
- the controller may be configured such that the final cell in the series, at a given regeneration time, may be the cell selected to be regenerated at the most recent previous regeneration time.
- Each of the cells in the series may be arranged in order of time since its last turn as the selected cell to be regenerated such that the most recently regenerated cell may be said final cell.
- Product fluid may be used in the reverse flow of fluid.
- the series of cells may be effective to achieve a 99.9% reduction total dissolved solids.
- the disclosed subject matter includes an installation for a fluid purification system that may be operable after the attachment of cells adapted for purifying fluid.
- This embodiment includes only the fluid handling circuit without the purification elements or cells.
- a fluid transport network has fluid channels, a controller, and valves are operable by the controller.
- the fluid transport network includes cell connectors adapted to receive cells adapted for purifying fluid and to direct forward and reverse flows through connected cells.
- the fluid transport network has connections for source fluid, purified product fluid, and waste fluid.
- the fluid transport network and controller are configured such that the controller operates the valves so that, at a first time, fluid may be directed from the source through connected first cells in a forward direction, in series, such that multiple purifications stages may be defined, the first cells forming a series with a first series cell being in a first position of the series and receiving the source fluid, a last series cell being in a last position of the series outputting product fluid, and intermediate series cells.
- the fluid transport network and controller are configured such that the controller operates the valves so that at said first time, fluid may be directed in a reverse direction through a connected second cell whereby simultaneous multi-stage purification and cell regeneration may be achieved
- the fluid transport network and controller are configured to operate the valves to rearrange the connected first cells and the second cell by replacing the last series cell with the second cell and replacing the second cell with the first series cell.
- the fluid transport network and controller are configured such that the controller operates the valves so that at said second time, fluid may be directed in a reverse direction through second cell, which was the first series cell at the first time. The rearrangement of cells in the series may be accomplished without disconnecting any of the cells from any of the respective cell connectors.
- the controller may be configured to apply a reverse a voltage of the second cell and apply a forward voltage to the first cells.
- the fluid may be water.
- the fluid transport network may have water channels and the network is configured to connect to water and water purification cells.
- the connectors may be adapted for receiving electronic deionization cells.
- the first cells, at the first time may be at least three in number having the first series cell, the last series cell and intermediate cells ordered by rank in the series; and the intermediate cells, at the second time, may be moved forward in rank so that the first series cell may be replaced by the intermediate cell of a lowest rank.
- Cells may be connected to said cell connectors to form an embodiment in which the cells are part of the embodiment rather than a system adapted to receive the cells.
- the controller may be adapted to operate the valves such that each of the cells may be repositioned successively through the series, taking a turn at each rank at respective times and taking a turn as the second cell to be regenerated.
- the disclosed subject matter includes a method of purifying water, which includes flowing water from a source, serially, through a series of electronic deionization (EDI) cells in a forward direction through each cell of the series so that a first cell of the series if of a lowest rank of the series and the last cell of the series may be of a highest rank of the series.
- the flowing is performed by a controller by controlling automatic valves controlled by the controller.
- the method includes using the controller and the automatic valves, positioning a freshly-regenerated cell in place of a last cell of said series while repositioning the other cells in the series by moving each cell to a lower rank so that the second rank may be repositioned as the first cell of the series.
- the method further includes using the controller and the automatic valves, regenerating the last cell by flowing water therethrough in a reverse direction.
- the method may include repeating the flowing using the cell regenerated in said regenerated in said regenerating.
- the method may also include repeating the positioning and the regenerating multiple times so that each cell takes more than one turn at each rank and may be regenerated substantially an equal number of times.
- each cell may contain more than one water purification module arranged in series or in parallel.
- the disclosed subject matter includes a method of purifying fluid that includes flowing fluid from a source, serially, through a series of cells in a forward direction through each cell of the series so that a first cell of the series if of a lowest rank of the series and the last cell of the series may be of a highest rank of the series.
- the cells are each adapted to purify fluid flowing therethrough.
- the flowing is performed by a controller by controlling automatic valves controlled by the controller.
- the method includes using the controller and the automatic valves, positioning a freshly-regenerated cell in place of a last cell of said series while repositioning the other cells in the series by moving each cell to a lower rank so that the second rank may be repositioned as the first cell of the series.
- the method includes using the controller and the automatic valves, regenerating the last cell by flowing fluid therethrough in a reverse direction.
- the method of the last paragraph may include repeating the flowing using the cell regenerated in said regenerated in said regenerating.
- the method may include positioning and the regenerating multiple times so that each cell takes more than one turn at each rank and may be regenerated substantially an equal number of times.
- Each cell may contain more than one fluid purification module arranged in series or in parallel.
- the disclosed subject matter includes a method of purifying fluid including using a controller and a fluid management system, directing fluid through a series of cells to purify the fluid in multiple stages while regenerating at least another cell such that fluid can be purified continuously without interruption for the regenerating.
- the method includes using the controller and fluid management system, changing the flow paths of the fluid management system so that the directing and regenerating may be effective to subject each cell to an equal load so that each cell may be exhausted at the same time, after being subjected to multiple instances of said regenerating.
- the changing the flow path may include flowing fluid in a reverse direction through a respective cell during said regenerating and flowing fluid in a forward direction through respective cells during said directing.
- the fluid may be water and the cells may be electronic deionization cells.
- modules, processes, systems, and sections described above can be implemented in hardware, hardware programmed by software, software instruction stored on a non-transitory computer readable medium or a combination of the above.
- a method for purifying water or other fluids and form maintaining a purification system can be implemented, for example, using a processor configured to execute a sequence of programmed instructions stored on a non-transitory computer readable medium.
- the processor can include, but not be limited to, a personal computer or workstation or other such computing system that includes a processor, microprocessor, microcontroller device, or is comprised of control logic including integrated circuits such as, for example, an Application Specific Integrated Circuit (ASIC).
- ASIC Application Specific Integrated Circuit
- the instructions can be compiled from source code instructions provided in accordance with a programming language such as Java, C++, C#.net or the like.
- the instructions can also comprise code and data objects provided in accordance with, for example, the Visual BasicTM language, LabVIEW, or another structured or object-oriented programming language.
- the sequence of programmed instructions and data associated therewith can be stored in a non-transitory computer-readable medium such as a computer memory or storage device which may be any suitable memory apparatus, such as, but not limited to read-only memory (ROM), programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), random-access memory (RAM), flash memory, disk drive and the like.
- ROM read-only memory
- PROM programmable read-only memory
- EEPROM electrically erasable programmable read-only memory
- RAM random-access memory
- flash memory disk drive and the like.
- modules, processes, systems, and sections can be implemented as a single processor or as a distributed processor. Further, it should be appreciated that the steps mentioned above may be performed on a single or distributed processor (single and/or multi-core). Also, the processes, modules, and sub-modules described in the various figures of and for embodiments above may be distributed across multiple computers or systems or may be co-located in a single processor or system. Exemplary structural embodiment alternatives suitable for implementing the modules, sections, systems, means, or processes described herein are provided below.
- the modules, processors or systems described above can be implemented as a programmed general purpose computer, an electronic device programmed with microcode, a hard-wired analog logic circuit, software stored on a computer-readable medium or signal, an optical computing device, a networked system of electronic and/or optical devices, a special purpose computing device, an integrated circuit device, a semiconductor chip, and a software module or object stored on a computer-readable medium or signal, for example.
- Embodiments of the method and system may be implemented on a general-purpose computer, a special-purpose computer, a programmed microprocessor or microcontroller and peripheral integrated circuit element, an ASIC or other integrated circuit, a digital signal processor, a hardwired electronic or logic circuit such as a discrete element circuit, a programmed logic circuit such as a programmable logic device (PLD), programmable logic array (PLA), field-programmable gate array (FPGA), programmable array logic (PAL) device, or the like.
- PLD programmable logic device
- PLA programmable logic array
- FPGA field-programmable gate array
- PAL programmable array logic
- any process capable of implementing the functions or steps described herein can be used to implement embodiments of the method, system, or a computer program product (software program stored on a non-transitory computer readable medium).
- embodiments of the disclosed method, system, and computer program product may be readily implemented, fully or partially, in software using, for example, object or object-oriented software development environments that provide portable source code that can be used on a variety of computer platforms.
- embodiments of the disclosed method, system, and computer program product can be implemented partially or fully in hardware using, for example, standard logic circuits or a very-large-scale integration (VLSI) design.
- VLSI very-large-scale integration
- Other hardware or software can be used to implement embodiments depending on the speed and/or efficiency requirements of the systems, the particular function, and/or particular software or hardware system, microprocessor, or microcomputer being utilized.
- Embodiments of the method, system, and computer program product can be implemented in hardware and/or software using any known or later developed systems or structures, devices and/or software by those of ordinary skill in the applicable art from the function description provided herein and with a general basic knowledge of control systems and/or computer programming arts.
- embodiments of the disclosed method, system, and computer program product can be implemented in software executed on a programmed general purpose computer, a special purpose computer, a microprocessor, or the like.
Abstract
Description
- Electronic deionization (EDI) is an established method for purification of water by removing ionic solutes. EDI uses filter units, hereafter referred to as cells, which have a membrane. EDI uses electricity in addition to a membrane to filter material including solutes. The membranes of cells can be regenerated electrically and by reverse flushing and are therefore regarded as re-usable. The number of regeneration cycles of cell may be limited because of gradual permanent degradation of the membrane of the cell.
- Ionic solutes may be expressed as total dissolved solids (TDS) in parts per million (PPM). As indicated above, an EDI cell may be capable of 85% to 95% TDS reduction. Higher levels of purification can be achieved with three or more EDI cells connected in series to achieve a ratio of TDS in the input water to that in the output water as shown in the table below. For example, water containing 1000 ppm TDS may have the TDS reduced at each stage of a series-connected cells as follows.
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1000 TDS × 90% Stage 1 = 900 TDS Reduction | out = 100ppm 100 TDS × 90% Stage 2 = 90 TDS Reduction | out = 10ppm 10 TDS × 90% Stage 3 = 9 TDS Reduction |out = 1 ppm1.0 ppm remaining from 1000 TDS starting concentration - When an EDI cell is actively removing ions, membranes of the cell are charged with electricity creating anionic and cationic bonding sites. EDI cells require regeneration after a period of time. During regeneration, the polarity on the membranes is reversed and water forced in a reverse direction to push the ions out of the bonding sites and flush the captured ions out of the cell.
- In EDI technology, a membrane, such as a re-usable membrane, has a finite service life. In general, the service life is a function of the number of regeneration cycles. During regeneration, the membrane is exposed to concentrated solutes. Progressive scaling of calcium carbonate and other solutes can occur during the regeneration cycle. As scale forms, the membrane becomes permanently degraded, ultimately requiring replacement.
- Embodiments of the disclosed subject matter relate to fluid purification methods, devices, and systems. In particular, embodiments of the disclosed subject matter involve multi-cell and multi-stage batch electronic deionization systems, methods, and devices.
- Embodiments include multiple cell, multi-stage purification systems, for example a four-cell, three-stage EDI system is described. In the disclosed embodiments, a predetermined purity is achieved while also optimizing a service interval between the replacements of one or more permanently degraded cells resulting from the system use, including multiple regeneration cycles of the cells in each stage. The disclosed subject matter may be adapted to achieve, for example, 99.9% total dissolved solids (TDS) reduction versus only 85% to 95% TDS reduction in a single stage system in which fluid flows through a single stage.
FIG. 1 shows an example of a two-cell system according to the prior art in whichvalves 26 are operated to produce a reverse flow incell 1 14 to regenerate it whilecell 2 16 receives a forward flow to purify the flowing water. Flushed reversed flow is drained through a drain. The flow restrictors 24 andcheck valves 26 cooperate with the valves to divert some of the purified water to the cell undergoing regeneration by reverse flow. A flow sensor andpressure switch 28 are provided. In addition to higher purity, a four-cell, three-stage, system or device can provide a much higher service life than a conventional two-cell single stage system. - Embodiments include a three-stage system or device comprised or consisting of three paired cells in fixed position. Such a system or device can also achieve about 99.9% TDS reduction.
- Objects and advantages of embodiments of the disclosed subject matter will become apparent from the following description when considered in conjunction with the accompanying drawings.
- Embodiments will hereinafter be described in detail below with reference to the accompanying drawings, wherein like reference numerals represent like elements. The accompanying drawings have not necessarily been drawn to scale. Where applicable, some features may not be illustrated to assist in the description of underlying features.
-
FIG. 1 is a block diagram of a two-cell electronic deionization system according to the prior art. -
FIG. 2 is a block diagram of a fluid purification system according to embodiments of the disclosed subject matter. -
FIGS. 3A-3D shows regeneration cycles of respective stages of a four-cell, three-stage electronic deionization system or device according to embodiments of the disclosed subject matter. -
FIG. 4 shows another embodiment in which a cell to be regenerated in a cell of a multi-stage purifier is regenerated while a parallel multi-stage purifier purifies fluid and then the multi-stage purifiers switch for regeneration of the next cell to be regenerated. - As used in the description, the term cell may refer to any kind of fluid purification element. Although specific examples are described which employ EDI cells in the context of water purification, it should be understood that the term cell may refer to one or more units that produce a reduction in filterable content of a fluid stream. In the case of EDI embodiments, the cells reduce ionic species as well particulates. Preferably, particulates are substantially removed from the fluid stream prior to passing through an EDI purification system.
- Embodiments described hereinbelow include multi-stage, multi-cell systems. In this case, each stage of an N-stage system may include one or more cells and the one or more cells will be arranged so that a first stage purifies fluid and outputs purified fluid to a second stage attached to it in a series relationship so that it can further purify the fluid. The series continues until the fluid is purified by an Nth stage. Fluid may also flow through cell modules that are arranged within a cell in a parallel relationship in each stage. To simplify discussion, such a stage, having multiple cell modules or filter units in which a flow is divided to flow through separate units, will still be called a “cell” herein.
- In a multi-stage system, the first cell in a series (that is, the first stage, which is receiving fluid from the source to be treated and not from an upstream cell stage) has the greatest filtering load. In embodiments, the first cell in the series is always the next cell to be regenerated. In further embodiments, multiple cells awaiting regeneration may stand by and be regenerated in parallel. The second cell in the series has a lighter load because the fluid it receives has a lower amount of material to remove. The third cell will have even less filtering load and so on for as many cells as are in the series.
-
FIG. 2 is a block diagram of afluid purification system 101 according to embodiments of the disclosed subject matter. Thesystem 101 may be, for example, a water purification plant that generates pure water used for medical treatment, for example, dialysate used in renal replacement therapy. The downstreamconsuming process 116, in such a case, may represent a process that stores pure water to be used later in the preparation of treatment fluids or a proportioning system that adds specific materials such as solutes for preparing treatment fluids such as dialysate. Water from a source may be filtered initially by asediment filter 100 and then pass through abackflow preventer 102. Apump 104 may be included but the system may also operate on source water line pressure, if sufficient. The fluid (advantageously, water) from the pump orbackflow preventer EDI purification system 108, in the present case identified as a 3-stage, 4 cell EDI system powered and controlled by acontroller 109. The fluid treated by theEDI system 108 may be further treated by aUV treatment cell 106 which may provide degradation of some chemicals or bio-contaminants. A chemical deionization stage including adual bed 110 and mixedbed 112 stage may further deionize the fluid (again, the system in the principal embodiment is directed to water, so the deionization would be used to deionize water). Anultrafiltration stage 114 may be provided for, as in a principal environment, to capture pyrogens and/or infectious particles. The latter is particularly useful for medical applications where the product fluid is used for medical purposes and thereby may come in contact with a patient's body. As indicated above, the consumingprocess 116 may be any of a variety of consuming processes. A drain may receive fluid from avalve 120 that diverts product fluid from the upstream stages to the drain during transient cycles or for testing during startup before a steady state product fluid production cycle begins. As will be explained further on, theEDI system 108 also produces waste water during regeneration of the cells. Note that theEDI system 108 may be replaced with any type of multi-stage multiple element filtration or purification system, where cells other than EDI type cells, whose purification capability can be regenerated, may be used. -
FIGS. 3A-3D shows stages of a four-cell, three-stage EDI system or device according to embodiments of the disclosed subject matter. The system shown inFIG. 2 can include the four-cell, three-stage electronic deionization system, for example at 108 as indicated. The EDI system ofFIGS. 3A-3D may be used in other systems as well or as a stand-alone deionization system. The system ofFIGS. 3A-3D may also be used with non-EDI purification cells that are regenerated using reverse flow or by other means. - Embodiments of the disclosed subject matter can include a three-stage electronic deionization system. Optionally, the system or device can include four cells. Other embodiments based on a different number of cells are also possible, for example, a two stage system or four or more stages in a system. In addition, as mentioned, a single cell may include more than one purification unit connected in parallel or series.
- Each of the
cells - The four cells can be inter-connected by tubing and valves, for example, as shown in
FIGS. 3A-3D . Each cell is shown at 340, 342, 344, and 346. The number of cells may vary in alternative embodiments. At any given time, three of thecells FIG. 3A , thecell 346 is undergoing regeneration andcells cell 340, is diverted to reverseflush cell 346 and the resulting waste stream flowed to a drain. To accomplish the simultaneous production and regeneration, control valves are set such thatvalves valves FIG. 3A , the dotted lines indicate lines where no flow occurs and the solid lines and arrows indicate that flow is occurring and the direction of the flow in the indicated lines. It can be seen by the arrangement of the flow paths that the identified regenerating and product water flows result as indicated by the solid and dotted lines. - In
FIG. 3B , thecell 340 is undergoing regeneration andcells cell 346, is diverted to reverseflush cell 344 and the resulting waste stream flowed to a drain. To accomplish the simultaneous production and regeneration, control valves are set such thatvalves valves FIG. 3B , the dotted lines indicate lines where no flow occurs and the solid lines and arrows indicate that flow is occurring and the direction of the flow in the indicated lines. It can be seen by the arrangement of the flow paths that the identified regenerating and product water flows result as indicated by the solid and dotted lines. - In
FIG. 3C , thecell 342 is undergoing regeneration andcells cell 344, is diverted to reverseflush cell 342 and the resulting waste stream flowed to a drain. To accomplish the simultaneous production and regeneration, control valves are set such thatvalves valves FIG. 3C , the dotted lines indicate lines where no flow occurs and the solid lines and arrows indicate that flow is occurring and the direction of the flow in the indicated lines. It can be seen by the arrangement of the flow paths that the identified regenerating and product water flows result as indicated by the solid and dotted lines. - In
FIG. 3D , thecell 340 is undergoing regeneration andcells cell 342, is diverted to reverseflush cell 340 and the resulting waste stream flowed to a drain. To accomplish the simultaneous production and regeneration, control valves are set such thatvalves valves FIG. 3D , the dotted lines indicate lines where no flow occurs and the solid lines and arrows indicate that flow is occurring and the direction of the flow in the indicated lines. It can be seen by the arrangement of the flow paths that the identified regenerating and product water flows result as indicated by the solid and dotted lines. - To illustrate that a variety of arrangements of a fluid management system (the valve network embodiments being a fluid management systems), an alternative arrangement regenerates one member of a series while the other members of the series wait. To allow continuous purification, a second series operates while the one is regenerated. By providing a suitable fluid management system (or valve network) all of the cells in each series can be suitably arranged in the series so that the most recently regenerated cell is last in the series (so product water comes out of it) and the cell that has been used for the longest time or volume of fluid since regeneration is first in the series.
FIG. 4 shows such a system where twomulti-stage purifiers FIG. 4 a cell to be regenerated (for example one in side 218) is regenerated while a parallel multi-stage purifier (for the example 220) purifies fluid and then the two multi-stage purifiers switch for regeneration of the next cell in the parallel multi-stage purifier is regenerated. The cells may be shifted in order so that the most recently regenerated cell is always last in the series by controlling thevalves 271 by thecontroller 210. Thevalves 259 through 261 may be operated bycontroller 210 so that a forward flow goes only to one side at a time while a reverse flow through a respective flow restrictor 24 returns through one of thevalves drain 20 with the check valves blocking flow so as to ensure the correct open flow path. Although not labeled individually, each series has valves that may be operated by thecontroller 210 to provide the aforementioned serial arrangement of cells. It may be confirmed that the arrangement ofFIG. 4 produces the desirable features of the other embodiments in which the purification load is distributed uniformly among thecells 275 of eachmulti-stage purifier FIG. 4 may have sensors for detecting TDS reduction from source to product as in the foregoing embodiments. As in prior systems, flow sensors andpressure switch 28, backflow preventers, etc. may be provided. - Variations of the
FIG. 4 embodiment are possible. For example each multi-stage purifier may have N cells and but N−M stages such that M stages are regenerated at a time and the cells ready for regeneration are switched out. For example, in a 4 cells system, three stages may be used in series and one stage left on standby to be switched into the circuit, and the first one to be regenerated switched out to await the next regeneration cycle which occurs when the second cell requiring regeneration is ready for regeneration. Thevalves 271 would be operated to regenerate both cells requiring regeneration in parallel (parallel flow). - The interconnection of cells, tubing, and valves can be controlled such that product water flows through any three cells in series at all times. A fourth cell can be controlled such that it is in a regeneration state or in an idle state. In embodiments, each cell may progress through the following sequence: regeneration->stage three->stage two->
stage 1. Optionally, each cell may progress through the aforementioned sequence such that no two cells are at the same stage at the same time. Thus, embodiments can include four cells that are controllable so as to operate in a rotating series to support three states of deionization plus a regeneration state. - One advantage embodiments of the disclosed subject matter provide is increased membrane life. This can be achieved by embodiments of the disclosed subject matter by spreading out usage of the four membranes based on the aforementioned cell operational sequence. That is to say, relative to service life of the membrane, life optimization can be achieved by spreading the service life over four membranes instead of two in a two-cell system. Note that a single cell must have an adjacent cell to supply purified water during regeneration. Assume that a pair of cells can have a service life of 1.0 units of volume, for instance, for a two membrane system. This can limit the interval between membrane exchange to 1.0 units of volume. The combination of four cells has a total service life of approximately 1.95 units of volume, for instance, for a four membrane system. As an example, systems, devices and methods according to embodiments of the disclosed subject matter, for instance four membrane systems, can have a service interval between membrane exchange of 1.95 units of volume, or a 95% increase over two-cell systems.
- The increased combined service life of the four membranes is possible because during stage two operation a membrane can be exhausted at 1/10th the rate of a single-stage system, and a membrane during stage three operation can be exhausted at 1/100th the rate of a single stage system.
- In any of the embodiments, water may be received at the source at pressure such that the water is conveyed through the valve system using the pressure from the source. Alternatively any of the embodiments may be provided with a pump to convey water. Note that any of the above systems may be modified by the inclusion of an arbitrary number of cells. Each or any cell in the embodiments may be replaced by one or more separate cells arranged in series or parallel. The cells may include any type of filtration or purification device that is capable of being regenerated. The cells may include a purification element such as one or more filter membranes, plates such as in an electrostatic precipitator, depth loading medium, inertial separator elements, or any other type of purification element(s). The cells are also permanently exhausted after being subjected to multiple regeneration cycles. In any of the embodiments, instead of purifying water, other fluids may be purified and used for processing including non-aqueous solvents, fuels, food products, cleaning fluids, etc.
- In any of the embodiments disclosed, the regeneration cycle may be triggered by a measured reduction in TDS or a threshold level of purity in the product stream which may be measured by a suitable sensor, for example, turbidity, conductivity or resistivity, pH, particle counting, optical diffusion, density, thermal conductivity temperature, or other property. The regeneration cycle may also be triggered by a predictive algorithm such as a measured volume of purified fluid having passed through since the last cycle or a predetermined time. A controller may be suitably configured to implement any of these criteria according to known techniques.
- In any of the disclosed embodiments, the valves and flow channels may take a variety of different forms depending on the capacity and type of fluid. Examples of configurations are shown, but a variety of different configurations are possible.
- According to embodiments, the disclosed subject matter includes a water purification system in which multiple cells are interconnected by a valving network, wherein each of the cells includes at least one purification element, for example, a membrane or other type of contaminant separator. A controller is configured to control the valves of the valving network and a source of water is connected to the valving network to provide water to be purified. The water may also be used for regenerating cells so the valving network includes a drain. A product water outlet is also provided. The controller is configured to, at a first time, generate a reverse flow of water through a first subset of the cells while simultaneously flowing water in a forward direction through two or more cells in a second subset, while connecting the two or more cells in the second in series. Thus the two or more cells of the series define a multiple stage purification component that provide purified water using a part of the valving network to conduct the water between the source and the product water outlet. The controller is further configured to direct a flow of water from the first subset of the cells to the drain while directing a flow from a last one of the two or more cells connected in series to a product water outlet. The cells in the first subset and the cells in the second subset are mutually exclusive, that is, the cell or cells being regenerated are not used, at the same time, for water purification, so the subsets are disjoint.
- In variations of the previous embodiment, the controller may be further configured to, at a second time, generate a reverse flow of water through a third subset of the cells while simultaneously flowing water in a forward direction through two or more cells in a fourth subset, while connecting the two or more cells in the fourth subset in series. In this variation,
- The cells in the third subset and the cells in the fourth subset may be mutually exclusive and wherein the cells in the first set and the third set may be mutually exclusive.
- In the variations of the previous embodiments, the reverse flow of water may be effective to regenerate the cells. The cells may be electronic deionization cells. In further variations, the controller may be configured to apply a reverse voltage to the cells in the first and third subsets at said first and second times, respectively. At the first time, the reverse flow of water may be water from last cell of the second subset in the series of cells which may be thereby purified water. At the second time, the reverse flow of water may be water from last cell of the fourth subset in the series of cells which may be thereby purified water. The second and fourth subsets may be interconnected in series such as to produce a 99.9% reduction in total dissolved solids in the water received from the source by the valve network.
- According to embodiments, the disclosed subject matter includes a water purification system with multiple cells interconnected by a valving network, wherein each of the cells has a membrane. For example, the cells may be EDI cells. The controller of the present embodiment is configured to, at regeneration times that can be selected by the controller, select each of the cells in turn to be a currently selected cell to be regenerated and to regenerate it by causing a reverse flow of water therethrough while simultaneously controlling the valves of the valve network to flow water from the source in series through the cells other than the currently selected cell to form a series of cells, the series of cells having a first cell which receives the water from the source and a final cell which provides purified water to the product water outlet. The water that reverse flows through the cell being regenerated can come from the cells being used for purification. The controller is configured such that, at each of said regeneration times, said each cell may be selected after it has been the first cell in the series of cells at a prior respective time.
- The valve network in this and all the embodiments can have connectors by which the cells can be removed and replaced with new ones as they expire after multiple purification and regeneration cycles. The above operations may be repeated may times until the cells expire. This may be done under control of the controller automatically. The regeneration cycles may be triggered by time, or an event, for example, the cells may rotated and regenerated as described above whenever the reduction in TDS, for the full series of cells, (i.e., the reduction in TDS from the source water to the product water) falls below a predetermined level. The controller may also monitor how much purified water is produced and generate a display to replace the cells manually when, between points where the product water quality falls below the predetermined level, the amount of produced water falls below a predetermined volume.
- The controller may be configured such that the final cell in the series, at a given regeneration time, may be the cell selected to be regenerated at the most recent previous regeneration time. Each of the cells in the series may be arranged in order of time since its last turn as the selected cell to be regenerated such that the most recently regenerated cell may be said final cell. The product water may be used in the reverse flow of water in any of the embodiments including the present one and the variations of it.
- The series of cells may be selected and arranged in number and/or capacity, so that they are, collectively—in the series—effective to achieve a 99.9% reduction total dissolved solids. As mentioned, the cells can be, or include, electronic deionization (EDI) cells. The number of cells may be at least three in advantageous embodiments. The regeneration times may be selected by the controller responsively to a measurement of water quality at a point in said series. Each of the cells in the series may be arranged in order of time (or cumulative treated fluid volume) since its last turn as the selected cell to be regenerated such that the most recently regenerated cell may be said final cell.
- To measure total fluid volume, for those embodiments in which the total cumulative volume is used for control, a flow meter may be used, for example, a rate meter or a displaced volume meter.
- According to embodiments, the disclosed subject matter includes a fluid purification system with multiple cells interconnected by a valving network, wherein each of the cells has a purification element such as a filter membrane, an EDI membrane, a depth loading filter, an inertial separation filter, an electrostatic precipitator or some other kind of separation element (or a plurality thereof) that removes contaminants or other materials from a fluid stream. The controller is configured to, at regeneration times, select each of the cells in turn to be a currently selected cell to be regenerated and to regenerate it by causing a reverse flow of fluid therethrough while simultaneously controlling the valves of the valve network to flow fluid from the source in series through the cells other than the currently selected cell to form a series of cells, the series of cells having a first cell which receives the fluid from the source and a final cell which provides purified fluid to the product fluid outlet. The controller is configured such that, at each of said regeneration times, said each cell may be selected after it has been the first cell in the series of cells at a prior respective time.
- In the embodiment of the last paragraph, the controller may be configured such that the final cell in the series, at a given regeneration time, may be the cell selected to be regenerated at the most recent previous regeneration time. Each of the cells in the series may be arranged in order of time since its last turn as the selected cell to be regenerated such that the most recently regenerated cell may be said final cell. Product fluid may be used in the reverse flow of fluid. The series of cells may be effective to achieve a 99.9% reduction total dissolved solids.
- According to embodiments, the disclosed subject matter includes an installation for a fluid purification system that may be operable after the attachment of cells adapted for purifying fluid. This embodiment includes only the fluid handling circuit without the purification elements or cells. A fluid transport network has fluid channels, a controller, and valves are operable by the controller. The fluid transport network includes cell connectors adapted to receive cells adapted for purifying fluid and to direct forward and reverse flows through connected cells. The fluid transport network has connections for source fluid, purified product fluid, and waste fluid. The fluid transport network and controller are configured such that the controller operates the valves so that, at a first time, fluid may be directed from the source through connected first cells in a forward direction, in series, such that multiple purifications stages may be defined, the first cells forming a series with a first series cell being in a first position of the series and receiving the source fluid, a last series cell being in a last position of the series outputting product fluid, and intermediate series cells. The fluid transport network and controller are configured such that the controller operates the valves so that at said first time, fluid may be directed in a reverse direction through a connected second cell whereby simultaneous multi-stage purification and cell regeneration may be achieved The fluid transport network and controller are configured to operate the valves to rearrange the connected first cells and the second cell by replacing the last series cell with the second cell and replacing the second cell with the first series cell. The fluid transport network and controller are configured such that the controller operates the valves so that at said second time, fluid may be directed in a reverse direction through second cell, which was the first series cell at the first time. The rearrangement of cells in the series may be accomplished without disconnecting any of the cells from any of the respective cell connectors.
- In the embodiment of the last paragraph, the controller may be configured to apply a reverse a voltage of the second cell and apply a forward voltage to the first cells. The fluid may be water. The fluid transport network may have water channels and the network is configured to connect to water and water purification cells. The connectors may be adapted for receiving electronic deionization cells. In a variation, the first cells, at the first time, may be at least three in number having the first series cell, the last series cell and intermediate cells ordered by rank in the series; and the intermediate cells, at the second time, may be moved forward in rank so that the first series cell may be replaced by the intermediate cell of a lowest rank. Cells may be connected to said cell connectors to form an embodiment in which the cells are part of the embodiment rather than a system adapted to receive the cells. In the embodiments with cells and without, the controller may be adapted to operate the valves such that each of the cells may be repositioned successively through the series, taking a turn at each rank at respective times and taking a turn as the second cell to be regenerated.
- According to embodiments, the disclosed subject matter includes a method of purifying water, which includes flowing water from a source, serially, through a series of electronic deionization (EDI) cells in a forward direction through each cell of the series so that a first cell of the series if of a lowest rank of the series and the last cell of the series may be of a highest rank of the series. The flowing is performed by a controller by controlling automatic valves controlled by the controller. The method includes using the controller and the automatic valves, positioning a freshly-regenerated cell in place of a last cell of said series while repositioning the other cells in the series by moving each cell to a lower rank so that the second rank may be repositioned as the first cell of the series. The method further includes using the controller and the automatic valves, regenerating the last cell by flowing water therethrough in a reverse direction.
- In variations of the method of the foregoing embodiment of the last paragraph, the method may include repeating the flowing using the cell regenerated in said regenerated in said regenerating. The method may also include repeating the positioning and the regenerating multiple times so that each cell takes more than one turn at each rank and may be regenerated substantially an equal number of times. each cell may contain more than one water purification module arranged in series or in parallel.
- According to embodiments, the disclosed subject matter includes a method of purifying fluid that includes flowing fluid from a source, serially, through a series of cells in a forward direction through each cell of the series so that a first cell of the series if of a lowest rank of the series and the last cell of the series may be of a highest rank of the series. The cells are each adapted to purify fluid flowing therethrough. The flowing is performed by a controller by controlling automatic valves controlled by the controller. The method includes using the controller and the automatic valves, positioning a freshly-regenerated cell in place of a last cell of said series while repositioning the other cells in the series by moving each cell to a lower rank so that the second rank may be repositioned as the first cell of the series. The method includes using the controller and the automatic valves, regenerating the last cell by flowing fluid therethrough in a reverse direction.
- The method of the last paragraph may include repeating the flowing using the cell regenerated in said regenerated in said regenerating. The method may include positioning and the regenerating multiple times so that each cell takes more than one turn at each rank and may be regenerated substantially an equal number of times. Each cell may contain more than one fluid purification module arranged in series or in parallel.
- According to embodiments, the disclosed subject matter includes a method of purifying fluid including using a controller and a fluid management system, directing fluid through a series of cells to purify the fluid in multiple stages while regenerating at least another cell such that fluid can be purified continuously without interruption for the regenerating. The method includes using the controller and fluid management system, changing the flow paths of the fluid management system so that the directing and regenerating may be effective to subject each cell to an equal load so that each cell may be exhausted at the same time, after being subjected to multiple instances of said regenerating.
- The changing the flow path may include flowing fluid in a reverse direction through a respective cell during said regenerating and flowing fluid in a forward direction through respective cells during said directing. The fluid may be water and the cells may be electronic deionization cells.
- It will be appreciated that the modules, processes, systems, and sections described above can be implemented in hardware, hardware programmed by software, software instruction stored on a non-transitory computer readable medium or a combination of the above. For example, a method for purifying water or other fluids and form maintaining a purification system can be implemented, for example, using a processor configured to execute a sequence of programmed instructions stored on a non-transitory computer readable medium. For example, the processor can include, but not be limited to, a personal computer or workstation or other such computing system that includes a processor, microprocessor, microcontroller device, or is comprised of control logic including integrated circuits such as, for example, an Application Specific Integrated Circuit (ASIC). The instructions can be compiled from source code instructions provided in accordance with a programming language such as Java, C++, C#.net or the like. The instructions can also comprise code and data objects provided in accordance with, for example, the Visual Basic™ language, LabVIEW, or another structured or object-oriented programming language. The sequence of programmed instructions and data associated therewith can be stored in a non-transitory computer-readable medium such as a computer memory or storage device which may be any suitable memory apparatus, such as, but not limited to read-only memory (ROM), programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), random-access memory (RAM), flash memory, disk drive and the like.
- Furthermore, the modules, processes, systems, and sections can be implemented as a single processor or as a distributed processor. Further, it should be appreciated that the steps mentioned above may be performed on a single or distributed processor (single and/or multi-core). Also, the processes, modules, and sub-modules described in the various figures of and for embodiments above may be distributed across multiple computers or systems or may be co-located in a single processor or system. Exemplary structural embodiment alternatives suitable for implementing the modules, sections, systems, means, or processes described herein are provided below.
- The modules, processors or systems described above can be implemented as a programmed general purpose computer, an electronic device programmed with microcode, a hard-wired analog logic circuit, software stored on a computer-readable medium or signal, an optical computing device, a networked system of electronic and/or optical devices, a special purpose computing device, an integrated circuit device, a semiconductor chip, and a software module or object stored on a computer-readable medium or signal, for example.
- Embodiments of the method and system (or their sub-components or modules), may be implemented on a general-purpose computer, a special-purpose computer, a programmed microprocessor or microcontroller and peripheral integrated circuit element, an ASIC or other integrated circuit, a digital signal processor, a hardwired electronic or logic circuit such as a discrete element circuit, a programmed logic circuit such as a programmable logic device (PLD), programmable logic array (PLA), field-programmable gate array (FPGA), programmable array logic (PAL) device, or the like. In general, any process capable of implementing the functions or steps described herein can be used to implement embodiments of the method, system, or a computer program product (software program stored on a non-transitory computer readable medium).
- Furthermore, embodiments of the disclosed method, system, and computer program product may be readily implemented, fully or partially, in software using, for example, object or object-oriented software development environments that provide portable source code that can be used on a variety of computer platforms. Alternatively, embodiments of the disclosed method, system, and computer program product can be implemented partially or fully in hardware using, for example, standard logic circuits or a very-large-scale integration (VLSI) design. Other hardware or software can be used to implement embodiments depending on the speed and/or efficiency requirements of the systems, the particular function, and/or particular software or hardware system, microprocessor, or microcomputer being utilized. Embodiments of the method, system, and computer program product can be implemented in hardware and/or software using any known or later developed systems or structures, devices and/or software by those of ordinary skill in the applicable art from the function description provided herein and with a general basic knowledge of control systems and/or computer programming arts.
- Moreover, embodiments of the disclosed method, system, and computer program product can be implemented in software executed on a programmed general purpose computer, a special purpose computer, a microprocessor, or the like.
- It is, thus, apparent that there is provided, in accordance with the present disclosure, systems, methods, and devices for purifying fluids. Many alternatives, modifications, and variations are enabled by the present disclosure. Features of the disclosed embodiments can be combined, rearranged, omitted, etc., within the scope of the invention to produce additional embodiments. Furthermore, certain features may sometimes be used to advantage without a corresponding use of other features. Accordingly, Applicants intend to embrace all such alternatives, modifications, equivalents, and variations that are within the spirit and scope of the present invention.
Claims (22)
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104150623A (en) * | 2014-05-16 | 2014-11-19 | 江苏宇海环保设备有限公司 | Water purifier with plurality of purification cans |
US9328969B2 (en) | 2011-10-07 | 2016-05-03 | Outset Medical, Inc. | Heat exchange fluid purification for dialysis system |
US9402945B2 (en) | 2014-04-29 | 2016-08-02 | Outset Medical, Inc. | Dialysis system and methods |
US10061899B2 (en) | 2008-07-09 | 2018-08-28 | Baxter International Inc. | Home therapy machine |
WO2021000516A1 (en) * | 2019-07-02 | 2021-01-07 | 江苏科技大学 | Swro and mcdi coupled seawater desalination system with energy recovery |
US11534537B2 (en) | 2016-08-19 | 2022-12-27 | Outset Medical, Inc. | Peritoneal dialysis system and methods |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7736328B2 (en) | 2007-07-05 | 2010-06-15 | Baxter International Inc. | Dialysis system having supply container autoconnection |
US11045596B2 (en) | 2016-05-06 | 2021-06-29 | Gambro Lundia Ab | Systems and methods for peritoneal dialysis having point of use dialysis fluid preparation using water accumulator and disposable set |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060231495A1 (en) * | 2005-04-13 | 2006-10-19 | Usfilter Corporation | Regeneration of adsorption media within electrical purification apparatuses |
US20070215474A1 (en) * | 2003-10-27 | 2007-09-20 | Bruce Batchelder | Electrodialysis System and Process |
Family Cites Families (194)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2860095A (en) * | 1952-07-22 | 1958-11-11 | Ionics | Separation of electrolytic solutions into concentrated and dilute streams |
US2788319A (en) * | 1956-02-07 | 1957-04-09 | Clayton Manufacturing Co | Ion exchange method and apparatus |
US2995334A (en) | 1959-06-08 | 1961-08-08 | Becton Dickinson Co | Clysis assembly |
US3034085A (en) | 1959-12-09 | 1962-05-08 | Whirlpool Co | Combined fluid and electrical connector |
US3100486A (en) | 1960-08-22 | 1963-08-13 | Becton Dickinson Co | Parenteral set assembly and clamp for use therein |
US3252124A (en) | 1961-03-10 | 1966-05-17 | Wago Klemmenwerk G M B H | Push-in connector |
US3103335A (en) | 1961-03-28 | 1963-09-10 | Resiflex Lab Inc | Unitary clamp means for flexible tubes |
US3579441A (en) | 1968-04-19 | 1971-05-18 | Hydronautics | Blood purification by dual filtration |
US3709365A (en) | 1970-06-01 | 1973-01-09 | Squibb & Sons Inc | Disposable pharmaceutical sterile closures |
US4370983A (en) | 1971-01-20 | 1983-02-01 | Lichtenstein Eric Stefan | Computer-control medical care system |
FR2129165A5 (en) | 1971-03-17 | 1972-10-27 | Rhone Poulenc Sa | |
US3786810A (en) | 1971-03-22 | 1974-01-22 | Levoy Inc S | Placement apparatus for positioning an elongated element in a body lument |
US4059512A (en) | 1974-12-27 | 1977-11-22 | Preventive Systems, Inc. | Process for removing endotoxin from biological fluids |
DE2613281C2 (en) | 1976-03-29 | 1984-12-20 | Günter van Dr.med. 4000 Düsseldorf Endert | Double lumen catheter |
DE2703087C2 (en) | 1977-01-26 | 1984-11-29 | Günter van Dr.med. 4000 Düsseldorf Endert | Double lumen catheter |
US4246101A (en) | 1978-12-28 | 1981-01-20 | Pure Cycle Corporation | Water recycling system |
NL172405C (en) * | 1979-07-03 | 1983-09-01 | Wafilin Bv | METHOD AND APPARATUS FOR FLUSHING A NUMBER OF SERIAL FILTRATION UNITS FOR PERFORMING A MEMBRANE FILTRATION UNDER PRESSURE. |
US4495067A (en) | 1980-12-02 | 1985-01-22 | Tracor, Inc. | Apparatus for preparation of infusion grade water |
FR2507481B1 (en) | 1981-06-16 | 1985-06-14 | Hospal Sodip | ARTIFICIAL KIDNEY WITH INTEGRATED CIRCUITS |
US4626240A (en) | 1981-11-06 | 1986-12-02 | Shiley Incorporated | Dual lumen subclavian cannula |
US4432765A (en) | 1982-07-14 | 1984-02-21 | Oscarsson Rolf A | Attachment device for medical fluids bag |
US4596550A (en) | 1982-09-24 | 1986-06-24 | Baxter Travenol Laboratories, Inc. | Method and apparatus for ultrafiltration measurement in a two pump dialysis system |
ATE22013T1 (en) | 1983-03-01 | 1986-09-15 | Sartorius Gmbh | DEVICE FOR PREPARATION OF MEDICAL INFUSION SOLUTIONS. |
DE8305713U1 (en) | 1983-03-01 | 1985-12-12 | Sartorius GmbH, 3400 Göttingen | Device for the preparation of medical infusion solutions for the "artificial kidney" |
DE3313421C2 (en) | 1983-04-13 | 1985-08-08 | Fresenius AG, 6380 Bad Homburg | Device for regulating the ultrafiltration rate in devices for extracorporeal cleaning of blood |
CH658636A5 (en) | 1983-11-02 | 1986-11-28 | Serge Michielin | WATERPROOF SEALING DEVICE ADAPTABLE TO ANY FORM OF PACKAGING OR APPARATUS CONTAINING FLUIDS. |
JPS60166040A (en) | 1984-02-08 | 1985-08-29 | Hitachi Ltd | Ion exchange resin and its adjusting method and manufacturing apparatus of ultrapure water using said resin |
US4564132A (en) | 1984-02-24 | 1986-01-14 | Scholle Corporation | Fluid dispensing assembly |
US4661246A (en) | 1984-10-01 | 1987-04-28 | Ash Medical Systems, Inc. | Dialysis instrument with dialysate side pump for moving body fluids |
US4643389A (en) | 1984-12-27 | 1987-02-17 | American Hospital Supply Corporation | Tubing occlusion clip |
US4784495A (en) | 1987-02-06 | 1988-11-15 | Gambro Ab | System for preparing a fluid intended for a medical procedure by mixing at least one concentrate in powder form with water |
US5079236A (en) | 1987-05-27 | 1992-01-07 | Hyal Pharmaceutical Corporation | Pure, sterile, pyrogen-free hyaluronic acid formulations their methods of preparation and methods of use |
US4810388A (en) | 1987-09-08 | 1989-03-07 | Ben Trasen | Portable intravenous solutions and water for injection apparatus and method |
US4804474A (en) | 1987-12-10 | 1989-02-14 | Robert Blum | Energy efficient dialysis system |
US5141493A (en) | 1990-01-26 | 1992-08-25 | Sarcos Group | Peritoneal dialysis system |
US5194157A (en) | 1990-03-09 | 1993-03-16 | Sorin Biomedica Emodialisi Srl | Blood purifying equipment particularly for the treatment of patients suffering from renal insufficiency, and a method of producing a reinfusion liquid for haemodiafiltration (HDF) |
US5139483A (en) | 1990-05-07 | 1992-08-18 | Ryan Medical, Inc. | Medical intravenous administration line connector |
US5102399A (en) | 1990-06-11 | 1992-04-07 | Chu Young K | Clinical tube holder valve assembly and method |
US5032265A (en) | 1990-06-20 | 1991-07-16 | Millipore Corporation | Method and system for producing sterile aqueous solutions |
US5221483A (en) | 1990-06-29 | 1993-06-22 | Coulter Corporation | Process and apparatus for removal of DNA, viruses and endotoxins |
CA2092201A1 (en) | 1990-08-20 | 1992-02-21 | Joaquin Mayoral | Medical drug formulation and delivery system |
US5250041A (en) | 1992-01-16 | 1993-10-05 | Fresenius Usa, Inc. | Tubing administration set for use in peritoneal dialysis |
US5484431A (en) | 1991-01-29 | 1996-01-16 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | System for creating at a site, remote from a sterile environment, a parenteral solution |
US5336165A (en) | 1991-08-21 | 1994-08-09 | Twardowski Zbylut J | Artificial kidney for frequent (daily) Hemodialysis |
US5308333A (en) | 1991-12-06 | 1994-05-03 | Baxter International Inc. | Air eliminating intravenous infusion pump set |
US5259954A (en) | 1991-12-16 | 1993-11-09 | Sepratech, Inc. | Portable intravenous solution preparation apparatus and method |
US5536412A (en) | 1992-02-06 | 1996-07-16 | Hemocleanse, Inc. | Hemofiltration and plasmafiltration devices and methods |
US5368555A (en) | 1992-12-29 | 1994-11-29 | Hepatix, Inc. | Organ support system |
US5910252A (en) | 1993-02-12 | 1999-06-08 | Cobe Laboratories, Inc. | Technique for extracorporeal treatment of blood |
US5622626A (en) | 1994-04-15 | 1997-04-22 | Pall Corporation | Multiple compartment filter and method for processing parenteral fluid |
JP3164970B2 (en) | 1994-06-17 | 2001-05-14 | 株式会社日立製作所 | Treatment of wastewater containing neutral salts of monovalent ions |
FR2723002B1 (en) | 1994-07-26 | 1996-09-06 | Hospal Ind | DEVICE AND METHOD FOR PREPARING A FILTRATION PROCESSING LIQUID |
JPH0852196A (en) | 1994-08-09 | 1996-02-27 | Material Eng Tech Lab Inc | Transfusion container having connecting port for medicine |
US5782762A (en) | 1994-10-27 | 1998-07-21 | Wake Forest University | Method and system for producing interactive, three-dimensional renderings of selected body organs having hollow lumens to enable simulated movement through the lumen |
JPH08252310A (en) | 1995-01-17 | 1996-10-01 | Miura Denshi Kk | Washing and disinfecting method of artificial dialyzing device using electrolytically generated acidic water, and device therefor |
US5932110A (en) | 1995-02-13 | 1999-08-03 | Aksys, Ltd. | Dialysate conductivity adjustment in a batch dialysate preparation system |
US5591344A (en) | 1995-02-13 | 1997-01-07 | Aksys, Ltd. | Hot water disinfection of dialysis machines, including the extracorporeal circuit thereof |
IT1275427B (en) | 1995-05-16 | 1997-08-07 | Bracco Spa | PROCESS FOR THE DEPIROGENATION OF INJECTABLE PHARMACEUTICAL SOLUTIONS |
AU5920796A (en) | 1995-05-22 | 1996-12-11 | Wastech International, Incorporated | Waste water purification system |
US5972225A (en) | 1996-05-07 | 1999-10-26 | Cook Imaging Corporation | Process for remediating endotoxin-contaminated bulk non-ionic contrast media |
US5707038A (en) | 1996-10-23 | 1998-01-13 | Cocatre-Zilgien; Jan H. | Hinged kink valve |
DE19704564A1 (en) | 1997-02-07 | 1998-08-13 | Polaschegg Hans Dietrich Dr | Flushing equipment for extracorporeal blood-treatment circuit |
US6106723A (en) | 1997-02-10 | 2000-08-22 | Grandics; Peter | Method for removing pyrogens from dialysate |
US6852090B2 (en) | 1997-02-14 | 2005-02-08 | Nxstage Medical, Inc. | Fluid processing systems and methods using extracorporeal fluid flow panels oriented within a cartridge |
US6638478B1 (en) | 1997-02-14 | 2003-10-28 | Nxstage Medical, Inc. | Synchronized volumetric fluid balancing systems and methods |
US20010016699A1 (en) | 1997-02-14 | 2001-08-23 | Jeffrey H. Burbank | Hemofiltration system |
US6589482B1 (en) | 1997-02-14 | 2003-07-08 | Nxstage Medical, Inc. | Extracorporeal circuits for performing hemofiltration employing pressure sensing without an air interface |
US6638477B1 (en) | 1997-02-14 | 2003-10-28 | Nxstage Medical, Inc. | Fluid replacement systems and methods for use in hemofiltration |
AU3273201A (en) | 1997-02-14 | 2001-06-04 | Nxstage Medical, Inc. | Fluid processing systems and methods using extracorporeal fluid flow panels oriented within a cartridge |
US6595943B1 (en) | 1997-02-14 | 2003-07-22 | Nxstage Medical, Inc. | Systems and methods for controlling blood flow and waste fluid removal during hemofiltration |
US6830553B1 (en) | 1997-02-14 | 2004-12-14 | Nxstage Medical, Inc. | Blood treatment systems and methods that maintain sterile extracorporeal processing conditions |
US5919357A (en) | 1997-05-20 | 1999-07-06 | United States Filter Corporation | Filter cartridge assembly |
FI103106B1 (en) | 1997-11-12 | 1999-04-30 | Amsco Europ Inc Suomen Sivulii | Process and apparatus for producing clean water |
US6017433A (en) | 1997-11-12 | 2000-01-25 | Archer Daniels Midland Company | Desalting aqueous streams via filled cell electrodialysis |
JP3671644B2 (en) | 1998-01-05 | 2005-07-13 | オルガノ株式会社 | Photoresist developing waste liquid recycling method and apparatus |
DE19801768C2 (en) | 1998-01-19 | 2001-04-19 | Fresenius Medical Care De Gmbh | Method and device for providing operational dialysis fluid |
WO1999037335A1 (en) | 1998-01-23 | 1999-07-29 | Hemotherm, Inc. | Apparatuses and processes for whole-body hyperthermia |
US7004924B1 (en) | 1998-02-11 | 2006-02-28 | Nxstage Medical, Inc. | Methods, systems, and kits for the extracorporeal processing of blood |
US6582385B2 (en) | 1998-02-19 | 2003-06-24 | Nstage Medical, Inc. | Hemofiltration system including ultrafiltrate purification and re-infusion system |
US6117335A (en) | 1998-02-23 | 2000-09-12 | New Star Lasers, Inc. | Decontamination of water by photolytic oxidation/reduction utilizing near blackbody radiation |
FR2778335B1 (en) | 1998-05-06 | 2001-02-09 | Dominique Lambert | RADIO FREQUENCY READ / WRITE LABEL POCKET FOR COLLECTION, STORAGE AND TRANSPORT OF BLOOD OR BLOOD COMPONENTS |
US7622044B2 (en) | 1998-07-06 | 2009-11-24 | Ecycling, LLC | Methods of sealing ponds and increasing water catchment with purified waste water |
US6651383B2 (en) | 1998-07-06 | 2003-11-25 | Gerald J. Grott | Methods of utilizing waste waters produced by water purification processing |
US6287516B1 (en) | 1998-07-10 | 2001-09-11 | Immunocept, L.L.C. | Hemofiltration systems, methods, and devices used to treat inflammatory mediator related disease |
DE19832451C1 (en) | 1998-07-18 | 1999-08-26 | Fresenius Medical Care De Gmbh | Method of checking the orderly exchange of a used filter in an arrangement for extracorporal blood treatment |
US6183637B1 (en) | 1998-07-23 | 2001-02-06 | Seh America, Inc. | Resin trap device for use in ultrapure water systems and method of purifying water using same |
US6729369B2 (en) | 1998-07-31 | 2004-05-04 | Chata Biosystems, Inc. | Vessel for containing/transporting a fluent substance |
US6331252B1 (en) | 1998-07-31 | 2001-12-18 | Baxter International Inc. | Methods for priming a blood compartment of a hemodialyzer |
US6044691A (en) | 1998-08-26 | 2000-04-04 | Aksys, Ltd. | Blood tubing set integrity tests for extracorporeal circuits |
EP0985443B1 (en) | 1998-09-10 | 2010-10-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Semipermeable membranes |
JP3655197B2 (en) | 1998-11-19 | 2005-06-02 | 富雄 太田 | Extracorporeal circulation device for separation temperature control method |
US6346187B1 (en) | 1999-01-21 | 2002-02-12 | The Regents Of The University Of California | Alternating-polarity operation for complete regeneration of electrochemical deionization system |
EP1157709B1 (en) | 1999-02-10 | 2012-05-30 | Tomio Ohta | Bloodless treating device |
US6254567B1 (en) | 1999-02-26 | 2001-07-03 | Nxstage Medical, Inc. | Flow-through peritoneal dialysis systems and methods with on-line dialysis solution regeneration |
US6274103B1 (en) | 1999-03-26 | 2001-08-14 | Prismedical Corporation | Apparatus and method for preparation of a peritoneal dialysis solution |
CA2369576C (en) | 1999-04-23 | 2005-07-05 | William Frederick Weitzel | Extracorporeal circuit and related methods |
GB9920170D0 (en) | 1999-08-25 | 1999-10-27 | Univ Portsmouth | A passive sampling device |
US6284142B1 (en) | 1999-09-03 | 2001-09-04 | Baxter International Inc. | Sensing systems and methods for differentiating between different cellular blood species during extracorporeal blood separation or processing |
US6492320B2 (en) | 1999-09-24 | 2002-12-10 | Rohm And Hass Company | Multifunctional, granulated pellet aid and process |
US6428518B1 (en) | 1999-11-05 | 2002-08-06 | Tandem Medical | Medication delivery container |
US6776912B2 (en) | 1999-12-23 | 2004-08-17 | Membrana Gmbh | Hemodiafiltration system and method |
DE60133148T2 (en) | 2000-01-11 | 2009-09-10 | Nephros, Inc. | Hemodial filtration device for blood analysis |
US6656423B1 (en) | 2000-02-07 | 2003-12-02 | Steris Inc. | Sterile water generator |
US6497676B1 (en) | 2000-02-10 | 2002-12-24 | Baxter International | Method and apparatus for monitoring and controlling peritoneal dialysis therapy |
DE10010539B4 (en) | 2000-03-03 | 2004-02-05 | Disetronic Licensing Ag | Affinity viscometry method and viscosimetric affinity sensor |
IT1320024B1 (en) | 2000-04-07 | 2003-11-12 | Gambro Dasco Spa | METHOD FOR ADJUSTING THE INFUSION IN A DIALYSIS MACHINE AND DIALYSIS MACHINE FOR THE APPLICATION OF THE MENTIONED METHOD. |
US6787040B2 (en) | 2000-05-16 | 2004-09-07 | Immunocept, L.L.C. | Method and system for colloid exchange therapy |
US6887214B1 (en) | 2000-09-12 | 2005-05-03 | Chf Solutions, Inc. | Blood pump having a disposable blood passage cartridge with integrated pressure sensors |
US6890315B1 (en) | 2000-05-23 | 2005-05-10 | Chf Solutions, Inc. | Method and apparatus for vein fluid removal in heart failure |
AU2002211821A1 (en) | 2000-09-27 | 2002-04-08 | Cobe Cardiovascular, Inc. | Disposable cartridge for a blood perfusion system |
JP4094946B2 (en) | 2000-10-19 | 2008-06-04 | ネフロス・インコーポレーテッド | Method and apparatus for producing sterile infusion |
US6689083B1 (en) | 2000-11-27 | 2004-02-10 | Chf Solutions, Inc. | Controller for ultrafiltration blood circuit which prevents hypotension by monitoring osmotic pressure in blood |
US7306736B2 (en) | 2000-12-08 | 2007-12-11 | Nephros, Inc. | Valve mechanism for infusion fluid systems |
JP4098624B2 (en) | 2000-12-20 | 2008-06-11 | ネフロス・インコーポレーテッド | Multistage hemodiafiltration / blood filtration method and apparatus |
CN100346869C (en) | 2001-02-07 | 2007-11-07 | 尼弗茹斯公司 | Method and apparatus for hemodiafiltration delivery module |
US6573734B2 (en) | 2001-05-08 | 2003-06-03 | The Board Of Trustees Of The University Of Illinois | Integrated thin film liquid conductivity sensor |
US7250619B2 (en) | 2001-05-14 | 2007-07-31 | Prismedical Corporation | Powered sterile solution device |
JP4590161B2 (en) | 2001-05-21 | 2010-12-01 | スコット・ラボラトリーズ・インコーポレイテッド | RF-ID label for medical container |
ITBO20010353A1 (en) | 2001-06-05 | 2002-12-05 | Gambro Dasco Spa | DIALIZING LIQUID PREPARATION DEVICE FOR A DIALYSIS MACHINE |
US20030042201A1 (en) | 2001-06-19 | 2003-03-06 | Sizelove Mark L. | Medical grade water production system |
US6572576B2 (en) | 2001-07-07 | 2003-06-03 | Nxstage Medical, Inc. | Method and apparatus for leak detection in a fluid line |
US6649063B2 (en) | 2001-07-12 | 2003-11-18 | Nxstage Medical, Inc. | Method for performing renal replacement therapy including producing sterile replacement fluid in a renal replacement therapy unit |
US20030010717A1 (en) | 2001-07-13 | 2003-01-16 | Nx Stage Medical, Inc. | Systems and methods for handling air and/or flushing fluids in a fluid circuit |
US6743193B2 (en) | 2001-07-17 | 2004-06-01 | Nx Stage Medical, Inc. | Hermetic flow selector valve |
JP4370552B2 (en) | 2001-09-14 | 2009-11-25 | ニプロ株式会社 | Chemical solution injection port |
US20030051767A1 (en) | 2001-09-19 | 2003-03-20 | Unilever Home And Personal Care Usa | Package and system |
US6726914B2 (en) | 2001-10-16 | 2004-04-27 | Kazuko Kuboyama | Method of reduction of aroma extract and resulting extract |
DE10151488A1 (en) | 2001-10-18 | 2003-05-22 | Klaus Buettner | Method and device for the treatment of aqueous liquids in human medical therapy |
EP1440041B1 (en) | 2001-11-05 | 2009-10-14 | Bionomics Ltd. | Apparatus and method for producing purified water having high microbiological purity by using a reverse osmosis membrane assembly |
KR100354613B1 (en) * | 2001-11-06 | 2002-10-11 | 박헌휘 | Repairable immersed hollow fiber membrane module |
US20030148017A1 (en) | 2001-12-07 | 2003-08-07 | Olli Tuominen | Copolymer coating for a hydrophobic membrane |
US20030236481A1 (en) | 2002-01-07 | 2003-12-25 | Jeffrey Burbank | Hemofiltration filter with high membrane utilization effectiveness |
US20030130606A1 (en) | 2002-01-07 | 2003-07-10 | Tuck Joseph E. | Blood treatment replacement fluid using infusible fluids in combination |
US6679988B2 (en) | 2002-01-09 | 2004-01-20 | Mechanical Equipment Company, Inc. | Apparatus for producing USP or WFI purified water |
DE60334067D1 (en) | 2002-01-31 | 2010-10-21 | Fenwal Inc | IRREVERSIBLE CLOSING POWER RIM CLAMP |
EP1471969A4 (en) | 2002-02-05 | 2008-04-30 | Univ Yale | Single access dialysis needle |
WO2003070351A1 (en) | 2002-02-15 | 2003-08-28 | Cuno Incorporated | System for monitoring the performance of fluid treatment cartridges |
US6745903B2 (en) | 2002-03-14 | 2004-06-08 | Peter Grandics | Methods for the on-line, on-demand preparation of sterile, water-for-injection grade water |
US6942633B2 (en) | 2002-03-22 | 2005-09-13 | Twin Star Medical, Inc. | System for treating tissue swelling |
AU2003228540A1 (en) | 2002-04-12 | 2003-10-27 | Ionics, Incorporated | Ion exchange regeneration and upw treatment system |
US6691058B2 (en) | 2002-04-29 | 2004-02-10 | Hewlett-Packard Development Company, L.P. | Determination of pharmaceutical expiration date |
WO2003103533A2 (en) | 2002-06-06 | 2003-12-18 | Nxstage Medical, Inc. | Last-chance quality check and/or air/pyrogen filter for infusion systems |
US6982038B2 (en) | 2002-06-14 | 2006-01-03 | Medtronic, Inc. | Centrifuge system utilizing disposable components and automated processing of blood to collect platelet rich plasma |
EP2298377A1 (en) | 2002-07-19 | 2011-03-23 | Baxter International Inc. | Systems and methods for peritoneal dialysis |
CA2411569A1 (en) | 2002-11-12 | 2004-05-12 | Ross E. Mantle | Medical device for the extravascular recirculation of fluid in body cavities at controlled temperature and pressure |
US8366883B2 (en) | 2002-11-13 | 2013-02-05 | Deka Products Limited Partnership | Pressurized vapor cycle liquid distillation |
WO2005068043A1 (en) | 2004-01-07 | 2005-07-28 | Nxstage Medical, Inc. | Filtration system for preparation of fluids for medical applications |
ATE434454T1 (en) | 2003-01-07 | 2009-07-15 | Nxstage Medical Inc | BATCH FILTRATION SYSTEM FOR PRODUCING A STERILE REPLACEMENT LIQUID FOR KIDNEY TREATMENTS |
US9700663B2 (en) | 2005-01-07 | 2017-07-11 | Nxstage Medical, Inc. | Filtration system for preparation of fluids for medical applications |
US20080210606A1 (en) | 2004-01-07 | 2008-09-04 | Jeffrey Burbank | Filtration System Preparation of Fluids for Medical Applications |
WO2004066121A2 (en) | 2003-01-15 | 2004-08-05 | Nxstage Medical Inc. | Waste balancing for extracorporeal blood treatment systems |
CA2493777A1 (en) | 2003-02-14 | 2004-08-26 | Dainichiseika Color & Chemicals Mfg. Co., Ltd. | Method of desalting |
US20050277805A1 (en) | 2003-03-06 | 2005-12-15 | Hatton Daniel M | Fecal incontinence assistance device |
US20040186415A1 (en) | 2003-03-20 | 2004-09-23 | Burbank Jeffrey H. | Blood circuit with leak-safe features |
US7314569B2 (en) | 2003-04-04 | 2008-01-01 | Arrowhead Center, Inc. | Treatment of arsenic-contaminated water using akaganeite adsorption |
US20050067341A1 (en) * | 2003-09-25 | 2005-03-31 | Green Dennis H. | Continuous production membrane water treatment plant and method for operating same |
US20050103717A1 (en) * | 2003-11-13 | 2005-05-19 | United States Filter Corporation | Water treatment system and method |
US8377279B2 (en) * | 2003-11-13 | 2013-02-19 | Siemens Industry, Inc. | Water treatment system and method |
US7393450B2 (en) | 2003-11-26 | 2008-07-01 | Silveri Michael A | System for maintaining pH and sanitizing agent levels of water in a water feature |
WO2005053824A2 (en) * | 2003-12-07 | 2005-06-16 | Ben-Gurion University Of The Negev Research And Development Authority | Method and system for increasing recovery and preventing precipitation fouling in pressure-driven membrane processes |
US20050171501A1 (en) | 2004-02-03 | 2005-08-04 | Thomas Kelly | Intravenous solution producing systems and methods |
JP4249642B2 (en) | 2004-03-01 | 2009-04-02 | 日本エア・リキード株式会社 | Wastewater treatment method for water system of dialysis facility |
JP2007535398A (en) | 2004-04-22 | 2007-12-06 | シーメンス ウォーター テクノロジース コーポレイション | Filtration device including membrane bioreactor and treatment tank for digesting organic substances, and waste liquid treatment method |
DE602006017654D1 (en) | 2005-01-07 | 2010-12-02 | Nxstage Medical Inc | FILTRATION SYSTEM FOR THE MANUFACTURE OF LIQUIDS FOR MEDICAL APPLICATIONS |
JP3772909B1 (en) | 2005-04-04 | 2006-05-10 | 東洋紡績株式会社 | Blood purifier |
BRPI0611042A2 (en) | 2005-05-06 | 2010-12-14 | Imi Vision Ltd | disposable cartridge and dialysis machine |
KR100687095B1 (en) | 2005-06-14 | 2007-02-26 | 한국전력기술 주식회사 | Electrodialysis reversal and electrochemical wastewater treatment process of compound containing nitrogen |
EP1900691B1 (en) | 2005-06-14 | 2020-01-08 | Asahi Kasei Kabushiki Kaisha | Apparatus for water treatment and method of treating water |
GB0516946D0 (en) | 2005-08-18 | 2005-09-28 | Univ York | Receptor |
WO2007025104A2 (en) | 2005-08-24 | 2007-03-01 | The Regents Of The University Of California | Membranes for nanometer-scale mass fast transport |
US7534349B2 (en) | 2005-09-02 | 2009-05-19 | Nephros, Inc. | Dual stage ultrafilter devices in the form of portable filter devices, shower devices, and hydration packs |
US7775375B2 (en) | 2005-11-03 | 2010-08-17 | Medica S.R.L. | Redundant ultrafiltration device |
US8092414B2 (en) | 2005-11-09 | 2012-01-10 | Nxstage Medical, Inc. | Diaphragm pressure pod for medical fluids |
US8469331B2 (en) | 2006-04-07 | 2013-06-25 | Nxstage Medical, Inc. | Filtration system for preparation of fluids for medical applications |
GB0608444D0 (en) | 2006-04-27 | 2006-06-07 | Binding Site The Ltd | Dialysis |
CN101534917A (en) | 2006-05-22 | 2009-09-16 | 纽约市哥伦比亚大学理事会 | Systems and methods of microfluidic membraneless exchange using filtration of extraction fluid outlet streams |
US8147696B1 (en) | 2006-09-19 | 2012-04-03 | Pandya Ken V | High-efficiency water-softening process |
US8293098B2 (en) | 2006-10-24 | 2012-10-23 | Siemens Industry, Inc. | Infiltration/inflow control for membrane bioreactor |
US20080185294A1 (en) | 2007-02-01 | 2008-08-07 | General Electric Company | Liquid management method and system |
US8281937B2 (en) | 2007-02-16 | 2012-10-09 | Nephros, Inc. | Compact fluid purification device with manual pumping mechanism |
US8505323B2 (en) | 2007-06-07 | 2013-08-13 | Deka Products Limited Partnership | Water vapor distillation apparatus, method and system |
TWI580778B (en) | 2007-06-19 | 2017-05-01 | 再生海藻能源公司 | Process for microalgae conditioning and concentration |
JP5504560B2 (en) | 2007-10-19 | 2014-05-28 | 東洋紡株式会社 | Hollow fiber membrane for liquid processing |
GB2458184A (en) | 2008-03-11 | 2009-09-16 | Hampshire Advisory Tech Serv | Apparatus for the generation of purified water |
US20100051546A1 (en) | 2008-07-03 | 2010-03-04 | Dxv Water Technologies, Llc | Water treatment systems and methods |
DE102008031662A1 (en) | 2008-07-04 | 2010-01-07 | Fresenius Medical Care Deutschland Gmbh | Device for peritoneal dialysis |
MX367394B (en) | 2008-08-15 | 2019-08-20 | Deka Products Lp | Water vending apparatus with distillation unit. |
DE102008039676A1 (en) * | 2008-08-26 | 2010-03-04 | Inge Watertechnologies Ag | Device and method for backwashing filter membrane modules |
JP2012517298A (en) | 2009-02-06 | 2012-08-02 | ベロメディックス,インク | Method and apparatus for introducing hypothermia therapy |
US8685251B2 (en) | 2009-12-05 | 2014-04-01 | Home Dialysis Plus, Ltd. | Ultra-pasteurization for dialysis machines |
US20120217162A1 (en) | 2009-11-25 | 2012-08-30 | Kurita Water Industries Ltd. | Apparatus and method for treating nitrogen compound-containing acidic liquid |
US20110315632A1 (en) * | 2010-05-24 | 2011-12-29 | Freije Iii William F | Membrane filtration system |
US8501009B2 (en) | 2010-06-07 | 2013-08-06 | State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Fluid purification system |
WO2013040420A2 (en) | 2011-09-15 | 2013-03-21 | Deka Products Limited Partnership | Systems, apparatus, and methods for a water purification system |
-
2012
- 2012-12-13 US US13/713,767 patent/US20130146541A1/en not_active Abandoned
-
2016
- 2016-06-20 US US15/187,689 patent/US10189727B2/en active Active
- 2016-07-19 US US15/214,438 patent/US10189728B2/en active Active
-
2018
- 2018-11-27 US US16/200,869 patent/US10947135B2/en active Active
-
2021
- 2021-02-16 US US17/176,621 patent/US20210163320A1/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070215474A1 (en) * | 2003-10-27 | 2007-09-20 | Bruce Batchelder | Electrodialysis System and Process |
US20060231495A1 (en) * | 2005-04-13 | 2006-10-19 | Usfilter Corporation | Regeneration of adsorption media within electrical purification apparatuses |
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US10068061B2 (en) | 2008-07-09 | 2018-09-04 | Baxter International Inc. | Home therapy entry, modification, and reporting system |
US10095840B2 (en) | 2008-07-09 | 2018-10-09 | Baxter International Inc. | System and method for performing renal therapy at a home or dwelling of a patient |
US10061899B2 (en) | 2008-07-09 | 2018-08-28 | Baxter International Inc. | Home therapy machine |
US9328969B2 (en) | 2011-10-07 | 2016-05-03 | Outset Medical, Inc. | Heat exchange fluid purification for dialysis system |
US10089443B2 (en) | 2012-05-15 | 2018-10-02 | Baxter International Inc. | Home medical device systems and methods for therapy prescription and tracking, servicing and inventory |
US9579440B2 (en) | 2014-04-29 | 2017-02-28 | Outset Medical, Inc. | Dialysis system and methods |
US9504777B2 (en) | 2014-04-29 | 2016-11-29 | Outset Medical, Inc. | Dialysis system and methods |
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US11534537B2 (en) | 2016-08-19 | 2022-12-27 | Outset Medical, Inc. | Peritoneal dialysis system and methods |
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Also Published As
Publication number | Publication date |
---|---|
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US10947135B2 (en) | 2021-03-16 |
US20170001887A1 (en) | 2017-01-05 |
US20210163320A1 (en) | 2021-06-03 |
US20160340214A1 (en) | 2016-11-24 |
US10189727B2 (en) | 2019-01-29 |
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