CN103657415A - Ultrafiltration method for automatic ultra-filtering system under linear trans-membrane pressure - Google Patents
Ultrafiltration method for automatic ultra-filtering system under linear trans-membrane pressure Download PDFInfo
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- CN103657415A CN103657415A CN201310730179.1A CN201310730179A CN103657415A CN 103657415 A CN103657415 A CN 103657415A CN 201310730179 A CN201310730179 A CN 201310730179A CN 103657415 A CN103657415 A CN 103657415A
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Abstract
The invention discloses an ultrafiltration method for an automatic ultra-filtering system under linear trans-membrane pressure. The method comprises the following steps: (1) setting a trans-membrane pressure value, initial flow, and operating time at the starting and ending points through a PLC controller, operating the ultra-filtering system at the initial flow, enabling the opening degree of a shutoff valve to be 100%, and pumping a sample solution to be ultra-filtered into the ultra-filtering system through a diaphragm pump, and enabling the whole system automatically to be fully filled with the sample solution; (2) keeping the constant flow of the ultra-filtering system unchanged, reducing the opening degree of the shutoff value, and increasing the trans-membrane pressure gradually to reach the trans-membrane pressure at the starting point set by the system; (3) changing the opening degree of the shutoff valve to achieve the liner change of the trans-membrane pressure value, continually operating the system to reach the trans-membrane pressure value at the ending point; (4) collecting the filtrate through a filtrate collecting container, performing cyclic ultra-filtering on the back-flow sample solution, and collecting the concentrated solution continually or batch by batch. The linear trans-membrane pressure of the ultra-filtering system is achieved, and the penetration rate of a sample membrane, the sample yield, and the ultra-filtering efficiency are improved.
Description
Technical field
The present invention relates to a kind of ultrafiltration system, particularly the hyperfiltration process of a kind of automatic ultrafiltration system under linear transmembrane pressure.
Background technology
Ultrafiltration be a kind of take screening be separation principle, the film separation process that the pressure of take is motive force, filtering accuracy, within the scope of 0.005-0.01 μ m, can effectively be removed particulate, colloid, bacterium, thermal source and macromolecule organic matter in water, can be widely used in the separation of material, concentrated, purification.Current ultrafiltration system cannot regulate transmembrane pressure and flow automatically, cannot reach the most rational ultrafiltration condition, and film transmitance and sample yield are low, and ultrafiltration efficiency is low.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide the hyperfiltration process of a kind of automatic ultrafiltration system that can improve sample film transmitance, sample yield and ultrafiltration efficiency under linear transmembrane pressure.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions: the hyperfiltration process of a kind of automatic ultrafiltration system under linear transmembrane pressure, wherein, this hyperfiltration process automatic ultrafiltration system used comprises membrane pump, milipore filter bag and PLC controller, membrane pump passes through driven by servomotor, the arrival end of membrane pump connects a shuttle, milipore filter bag has inlet, liquid outlet and liquid return hole, between the port of export of membrane pump and the inlet of milipore filter bag, be connected with the first pressure sensor, the liquid return hole of milipore filter bag is connected with the second pressure sensor, the second pressure sensor connects a shutoff valve, shutoff valve connects again the first electric conductivity detector, after the first electric conductivity detector, stream is out divided into two-way, lead up to after recycle control valve and enter shuttle, the dope of separately leading up to enters a dope collection container after discharging control valve, after being connected with the 3rd pressure sensor and the second electric conductivity detector successively, the liquid outlet of milipore filter bag is connected with filtrate collection container, servomotor, the first pressure sensor, the second pressure sensor, the 3rd pressure sensor and shutoff valve are connected with described PLC controller respectively, this hyperfiltration process comprises the following steps:
(1) first by PLC controller, set transmembrane pressure value, initial flow and the running time of super initial point and end point, ultrafiltration system brings into operation with initial flow, the aperture of shutoff valve is 100%, treat that ultrafiltration sample solution pumps into ultrafiltration system by membrane pump, make sample solution automatically fill with whole system;
(2) keep the constant flow rate of ultrafiltration system constant, PLC controller reduces the aperture of shutoff valve according to the feedback signal of the first pressure sensor, the second pressure sensor and the 3rd pressure sensor, thereby transmembrane pressure increases gradually, the transmembrane pressure of the starting point that the system of reaching sets;
(3) PLC controller changes the aperture of shutoff valve according to the feedback signal of the first pressure sensor, the second pressure sensor and the 3rd pressure sensor, realizes the linear change of transmembrane pressure value, and system continuous service reaches the transmembrane pressure value of end point;
(4) filtrate after ultrafiltration is after the liquid outlet of milipore filter bag is discharged, by filtrate collection container, collected, PLC controller can regulate opening or closing of recycle control valve, when opening recycle control valve, backflow sample solution enters again shuttle through recycle control valve and carries out loop ultrafiltration, PLC controller, by regulating dope to discharge the opening and closing of control valve, carries out continuous collection or the batch collection of concentrate.
Further, recycle control valve in this hyperfiltration process automatic ultrafiltration system used, dope are discharged control valve and are connected respectively pilot solenoid valve, the source of the gas input of pilot solenoid valve connects power gas source, pilot solenoid valve is also connected with PLC controller, PLC controller is controlled the opening and closing of pilot solenoid valve, realize the supply of power gas source, thereby the opening and closing of recycle control valve, dope discharge control valve are controlled.
Further, the first described electric conductivity detector is connected with industrial touch control computer respectively with the second electric conductivity detector, solution conductivity value is carried out to Real-Time Monitoring.
Compared with prior art, the present invention has the following advantages:
(1) hyperfiltration process of the present invention can only need to be equipped with a membrane pump and milipore filter bag on traditional ultrafiltration system basis, can realize whole ultra-filtration process;
(2) hyperfiltration process under linear transmembrane pressure provided by the invention can the parameter by simple 2 transmembrane pressures arrange by the built-in software of PLC controller, realizes linear transmembrane pressure.PLC controller can be controlled two point Linear transmembrane pressures automatically, three pressure sensors that connect according to milipore filter bag regulate shutoff valve aperture and pump discharge, reach the transmembrane pressure of linear change, realize the ultra-filtration process of linear transmembrane pressure, improve ultrafiltration efficiency, than existing ultrafiltration system, ultrafiltration efficiency can improve 30-50%;
(3) system can be cut circulation and the sample collection that valve is realized system stream automatically, can also pass through electric conductivity detector, and Real-Time Monitoring solution conductivity value, grasps ultrafiltration schedule in real time, the convenient sample having filtered of processing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the automatic ultrafiltration system that uses of hyperfiltration process of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
As shown in Figure 1, the hyperfiltration process of a kind of automatic ultrafiltration system under linear transmembrane pressure, wherein, this hyperfiltration process automatic ultrafiltration system used comprises membrane pump 1, milipore filter bag 3 and PLC controller 15, membrane pump 1 drives by servomotor 2, the arrival end of membrane pump 1 connects a shuttle 12, milipore filter bag 3 has inlet 31, liquid outlet 33 and liquid return hole 32, between the port of export of membrane pump 1 and the inlet 31 of milipore filter bag 3, be connected with the first pressure sensor 4, the liquid return hole 32 of milipore filter bag 3 is connected with the second pressure sensor 5, the second pressure sensor 5 connects a shutoff valve 7, shutoff valve 7 connects again the first electric conductivity detector 10, after the first electric conductivity detector 10, stream is out divided into two-way, lead up to after recycle control valve 9 and enter shuttle 12, the dope of separately leading up to enters a dope collection container 14 after discharging control valve 8, after being connected with the 3rd pressure sensor 6 and the second electric conductivity detector 11 successively, the liquid outlet 33 of milipore filter bag 3 is connected with filtrate collection container 13, servomotor 2, the first pressure sensor 4, the second pressure sensor 5, the 3rd pressure sensor 6 and shutoff valve 7 are connected with described PLC controller 15 respectively.
This hyperfiltration process comprises the following steps:
(1) first by PLC controller 15, set transmembrane pressure value, initial flow and the running time of super initial point and end point, ultrafiltration system brings into operation with initial flow, the aperture of shutoff valve 7 is 100%, treat that ultrafiltration sample solution pumps into ultrafiltration system by membrane pump 1, make sample solution automatically fill with whole system;
(2) keep the constant flow rate of ultrafiltration system constant, PLC controller 15 reduces the aperture of shutoff valve 7 according to the feedback signal of the first pressure sensor 4, the second pressure sensor 5 and the 3rd pressure sensor 6, thereby transmembrane pressure increases gradually, the transmembrane pressure of the starting point that the system of reaching sets;
(3) PLC controller 15 changes the aperture of shutoff valve 7 according to the feedback signal of the first pressure sensor 4, the second pressure sensor 5 and the 3rd pressure sensor 6, realizes the linear change of transmembrane pressure value, and system continuous service reaches the transmembrane pressure value of end point;
(4) filtrate after ultrafiltration is after the liquid outlet 33 of milipore filter bag 3 is discharged, by filtrate collection container 13, collected, PLC controller 15 can regulate opening or closing of recycle control valve 9, when opening recycle control valve 9, backflow sample solution enters again shuttle 12 through recycle control valve 9 and carries out loop ultrafiltration, PLC controller 15, by regulating dope to discharge the opening and closing of control valve 8, carries out continuous collection or the batch collection of concentrate.When concentrate does not reach certain concentrating degree, dope is discharged control valve 8 in closed condition, when concentrate is concentrated to certain degree, by PLC controller 15, to open dope and discharge control valve 8, concentrate enters dope collection container 14 by pipeline and collects continuously.In addition, also can be in shuttle 12 after the complete ultrafiltration of ultrafiltration sample solution finishes, PLC controller 15 is controlled and is opened dope and discharge control valve 8, carries out the batch collection of concentrate.
Recycle control valve 9, dope are discharged control valve 8 and are connected with respectively pilot solenoid valve 17, and the source of the gas input of pilot solenoid valve 17 is connected with power gas source, and pilot solenoid valve 17 is also connected with PLC controller 15.Recycle control valve 9, dope are discharged control valve 8 and are pneumatic operated valve.Pilot solenoid valve 17 connects pneumatic bigeminy part 18 and silencer 19.PLC controller 15 is controlled the opening and closing of pilot solenoid valve 17, thereby controls entering of power gas source, and then controls the opening and closing of recycle control valve 9 and dope discharge control valve 8.
The first electric conductivity detector 10 is connected with industrial touch control computer 16 respectively with the second electric conductivity detector 11, can Real-Time Monitoring solution conductivity value, grasp in real time ultrafiltration schedule, the convenient sample having filtered of processing.
The parameter that the present invention can carry out 2 transmembrane pressures by the built-in software of PLC controller 15 arranges, three pressure sensors that PLC controller 15 connects according to milipore filter bag 3 regulate aperture and the pump discharge of shutoff valve 7, realize linear transmembrane pressure, obtain the most rational ultrafiltration condition, realize the ultra-filtration process of linear transmembrane pressure, improve ultrafiltration efficiency, than existing ultrafiltration system, ultrafiltration efficiency can improve 30-50%.Automatic ultrafiltration system of the present invention can be used for various ultrafiltration, and desalination is purified, concentrated application and system pilot scale and production level scale.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. the automatic ultrafiltration system hyperfiltration process under linear transmembrane pressure, wherein, this hyperfiltration process automatic ultrafiltration system used comprises membrane pump, milipore filter bag and PLC controller, membrane pump passes through driven by servomotor, the arrival end of membrane pump connects a shuttle, milipore filter bag has inlet, liquid outlet and liquid return hole, between the port of export of membrane pump and the inlet of milipore filter bag, be connected with the first pressure sensor, the liquid return hole of milipore filter bag is connected with the second pressure sensor, the second pressure sensor connects a shutoff valve, shutoff valve connects again the first electric conductivity detector, after the first electric conductivity detector, stream is out divided into two-way, lead up to after recycle control valve and enter shuttle, the dope of separately leading up to enters a dope collection container after discharging control valve, after being connected with the 3rd pressure sensor and the second electric conductivity detector successively, the liquid outlet of milipore filter bag is connected with filtrate collection container, servomotor, the first pressure sensor, the second pressure sensor, the 3rd pressure sensor and shutoff valve are connected with described PLC controller respectively, it is characterized in that, hyperfiltration process comprises the following steps:
(1) first by PLC controller, set transmembrane pressure value, initial flow and the running time of super initial point and end point, ultrafiltration system brings into operation with initial flow, the aperture of shutoff valve is 100%, treat that ultrafiltration sample solution pumps into ultrafiltration system by membrane pump, make sample solution automatically fill with whole system;
(2) keep the constant flow rate of ultrafiltration system constant, PLC controller reduces the aperture of shutoff valve according to the feedback signal of the first pressure sensor, the second pressure sensor and the 3rd pressure sensor, thereby transmembrane pressure increases gradually, the transmembrane pressure of the starting point that the system of reaching sets;
(3) PLC controller changes the aperture of shutoff valve according to the feedback signal of the first pressure sensor, the second pressure sensor and the 3rd pressure sensor, realizes the linear change of transmembrane pressure value, and system continuous service reaches the transmembrane pressure value of end point;
(4) filtrate after ultrafiltration is after the liquid outlet of milipore filter bag is discharged, by filtrate collection container, collected, PLC controller can regulate opening or closing of recycle control valve, when opening recycle control valve, backflow sample solution enters again shuttle through recycle control valve and carries out loop ultrafiltration, PLC controller, by regulating dope to discharge the opening and closing of control valve, carries out continuous collection or the batch collection of concentrate.
2. the hyperfiltration process of a kind of automatic ultrafiltration system according to claim 1 under linear transmembrane pressure, it is characterized in that: the recycle control valve in this hyperfiltration process automatic ultrafiltration system used, dope are discharged control valve and connected respectively pilot solenoid valve, the source of the gas input of pilot solenoid valve connects power gas source, pilot solenoid valve is also connected with PLC controller, PLC controller is controlled the opening and closing of pilot solenoid valve, realize the supply of power gas source, thereby the opening and closing of recycle control valve, dope discharge control valve are controlled.
3. the hyperfiltration process of a kind of automatic ultrafiltration system according to claim 1 under linear transmembrane pressure, it is characterized in that: the first described electric conductivity detector is connected with industrial touch control computer respectively with the second electric conductivity detector, solution conductivity value is carried out to Real-Time Monitoring.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261193A (en) * | 2022-05-31 | 2022-11-01 | 利穗科技(苏州)有限公司 | Biological product concentration system and process thereof |
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| US4381999A (en) * | 1981-04-28 | 1983-05-03 | Cobe Laboratories, Inc. | Automatic ultrafiltration control system |
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| CN101069815A (en) * | 2007-03-30 | 2007-11-14 | 西安建筑科技大学 | Control device for fully-automatic constant-flow super-filtering water treatment |
| CN201020343Y (en) * | 2006-12-20 | 2008-02-13 | 华南理工大学 | Multi-stage hyper-filtering concentration separation automatic control device |
| CN102015076A (en) * | 2008-02-19 | 2011-04-13 | Abb研究有限公司 | On-line performance management of membrane separation process |
| CN203043849U (en) * | 2012-11-16 | 2013-07-10 | 湖州德翔环境科技有限公司 | Self-control ultrafiltration system |
| CN103298542A (en) * | 2010-10-15 | 2013-09-11 | 艾克塞勒雷克斯公司 | Large volume disposable ultrafiltration systems and methods |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4381999A (en) * | 1981-04-28 | 1983-05-03 | Cobe Laboratories, Inc. | Automatic ultrafiltration control system |
| JPS62500775A (en) * | 1984-11-15 | 1987-04-02 | バクスター・インターナショナル・インコーポレーテッド | Filtrate flow rate control system and method in a filtration device |
| CN201020343Y (en) * | 2006-12-20 | 2008-02-13 | 华南理工大学 | Multi-stage hyper-filtering concentration separation automatic control device |
| CN101069815A (en) * | 2007-03-30 | 2007-11-14 | 西安建筑科技大学 | Control device for fully-automatic constant-flow super-filtering water treatment |
| CN102015076A (en) * | 2008-02-19 | 2011-04-13 | Abb研究有限公司 | On-line performance management of membrane separation process |
| CN103298542A (en) * | 2010-10-15 | 2013-09-11 | 艾克塞勒雷克斯公司 | Large volume disposable ultrafiltration systems and methods |
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| CN115261193A (en) * | 2022-05-31 | 2022-11-01 | 利穗科技(苏州)有限公司 | Biological product concentration system and process thereof |
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