CN104692605A - Reduction treatment method and device for oily sludge - Google Patents
Reduction treatment method and device for oily sludge Download PDFInfo
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- CN104692605A CN104692605A CN201510147096.9A CN201510147096A CN104692605A CN 104692605 A CN104692605 A CN 104692605A CN 201510147096 A CN201510147096 A CN 201510147096A CN 104692605 A CN104692605 A CN 104692605A
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Abstract
The invention relates to a reduction treatment method and device for oily sludge. The reduction treatment method for the oily sludge comprises the steps that firstly, fluidization and pretreatment are performed on a sludge system, wherein sludge materials are conveyed to a feeding hopper via a screw conveyor, a cutting type mechanical stirrer is started, circulating water is mixed back, the fluidized sludge materials flow towards a fluidization and pretreatment tank, and the stirred and aerated fluidized sludge enters a demulsification tank through a mechanical grille with grille gaps being not larger than 15 mm; secondly, conditioning and demulsification are performed on the sludge system, wherein a cleaning agent is added into a tank inlet through a chemical feed pump, a coil heating and temperature control system is powered on, a stirrer is started, and therefore homogenization conditioning and demulsification desorption are performed on the sludge system; the sludge system is conveyed to a secondary inverted-cone-shaped conditioning and demulsification treatment tank for treatment after being subjected to primary conditioning and demulsification, the treated sludge system converges into the inverted-cone-shaped part, and sludge discharge is performed through a perforated pipe; thirdly, ultrasonic destabilization of the sludge system is performed; fourthly, mechanical centrifugation is performed on the sludge system. According to the reduction treatment method and device for the oily sludge, the problem of volume and quantity reduction of recovered and discharged sludge during dirty oil separation in an oily sludge system is solved scientifically and effectively.
Description
Technical field
The present invention relates to method and the device of process oily sludge, be specifically related to a kind of oily sludge minimizing treatment process and device thereof.
Background technology
Along with oil-field development enters the middle High water cut stage successively, water ratio in Produced Liquid constantly raises, comprise the sequential use of the various intensified oil reduction measures of chemical flooding, Produced Liquid character is made again to become more complicated (Wang Zhihua(Wang Zhi China), Wei Lixin(Wei Li is new), Wang Jinxiu(Wang Jin show)
science Technology and Engineering(science and technology and engineering), 2009,9(23): 6997 ~ 7001).Correspondingly plane system focuses on and stands in when carrying out dehydrating of crude oil, and the bottom such as water trap, storage tank, slop oil tank can exist a large amount of oily sludge in plastic state; When carrying out sewage disposal, the positions such as sedimentation oil removing pot, hay tank, aeration tank, flotation cell and recovery pond (tank) can also exist a large amount of oily sludge in fluidised form.Meanwhile, peripheral scattered oil field is continuing to increase exploration, exploitation dynamics in recent years as taking over reserves, but because of its limits throughput, its oil production method is except adopting production on artificial lift, also has bailing production, oil-collecting technique, except employing Cemented filling, also has regular roping mode, this just inevitably by producing that part mixing earth amount, chad amount are more, impurity particle size distribution is wider in the solid-state oily sludge that lands.These sludge components are complicated, belong to three-phase mixture system, generally be made up of oil-in-water (O/W), water-in-oil (W/O) milk sap and suspended solid impurities, and emulsifying stability is strong, viscosity is larger, solid-phase component is difficult to thorough sedimentation, this three-phase mixture ties up to that high water-cut development period in oil field is main to be shown as it and coexist mutually, and accumulation generation is many, accumulate pressure large (Zhao Huren(Zhao Hu benevolence), and Li Huimin(Li Hui is quick), Zhang Yanping(opens swallow duckweed)
environmental Protection of Oil & Gas Fields(oil-gas field environment protection), 2010,20(3): 24 ~ 31).
According to current statistics, day process 20000m
3oilfield sewage station just can produce 20m every day
3~ 60m
3oily sludge, wherein in sewage sedimentation oil removing section, the spoil disposal of oil removing pot has three kinds of modes usually: one is perforated pipe spoil disposal, at the bottom of tank, establish perforated pipe, regular spoil disposal; Two is waterpower spoil disposals, establishes a conical sludge hopper or several little Ji mud pits, extracted out by mud with sludge pump at the bottom of tank.In order to increase the mobility of mud, establishing a circle mud flushing tube around at the bottom of tank, the tank that diameter is larger, at the bottom of tank, also establishing several radial mud flushing tubes, mud flushing tube is pacified nozzle or apertured mouth; Three is artificial spoil disposals, needs to stop production during cleaning, does not need specialized facilities, only need reserve larger manhole at the bottom of tank, and will have manhole in relative tank skin both sides, to improve ventilation condition.In sewage water filtration section, mud is present in filtrate, recovery water pot is entered with back flushing draining when back flushing, reclaim water pot accumulation sludge quantity to be on the increase, if do not discharge in time, can oil removing pot be recycled to again, oily sludge can be caused in the course of time aging, form vicious cycle (Hu Dianqi(Hu Dianqi)
oil-Gas Field Surface Engineering(oil-gas field surface engineering), 2011,30(5): 99; Zhang Yuxin(opens beautiful prosperous),
oil-Gas Field Surface Engineering(oil-gas field surface engineering), 2013,32(9): 92 ~ 93; Feng Yongxun(Feng Yong instructs), D
esign Manual of Produced Water Disposal in Oilfield(oil field extracted water Treatment Design handbook), 2005).These discharge oily sludge composition complicacy determine the diversity of its treatment technology, but simple air storage, sanitary landfill, the method of disposal such as to pave the way is difficult to keep a foothold in oil field, improve and strict sludge treatment regulation, the sludge treatment technique that researchdevelopment is new, and various effective disposal of oily sludge and rcclamatiox technology become a kind of inevitable, the method of process oily sludge mainly concentrates on chemical heat washing method at present both at home and abroad, high temperature pyrolysis facture, mechanical centrifugal facture and solvent extration, progressively exploring biological process simultaneously, microwave method etc. (Song Wei(Song Wei), Liu Liu Jianguo(founds the state), Nie Nie Yongfeng(Yongfeng),
journal of Tsinghua University (Science and Technology)(Tsing-Hua University's journal (natural science edition)), 2008,48(9): 73 ~ 77, Jiang Yijian(ginger is also hard), Guo Futai(Guo Fu is safe), Du Haitao(shuts out great waves),
oil-Gas Field Surface Engineering(oil-gas field surface engineering), 2009,28(1): 8 ~ 9, Wang Wanfu(king woman's bow), Jin Hao(gold is great), Shi Feng(stone is rich), Liu Peng(Liu Peng), the yellow Jie of Huang Jie(),
chemical Engineering of Oil & Gas(oil and gas chemical industry), 2010,39(2): 173 ~ 177, the huge peak of Li Lee Jufeng(), Cao Weiping(behaviour defends flat), Feng Yujun(Feng Yu army), Tang Lin(soup woods),
petroleum Planning & Engineering(oil planning and design), 2005,16(5): 30-32, Karamalidis A. K., Evangelou A. C., Karabika E., Koukkou A. I., Drainas C., Voudrias E. A.,
bioresource Technology, 2010,101(16): 6545 ~ 6552).These methods in engineer applied from raising processing efficiency, improve treatment effect, ensure that the aspects such as operation stability obtain constantly to improve and development, but or produce mud mainly for stablizing good sewage plant water conditioning in conventional fluidization, or main with the Separation and Recovery of oil in water emulsion for target, when forming in the face of proterties, dredged sediment at the bottom of the tank that emulsification property is different, sewage disposal produces mud and the coexisting body of oily sludge of landing, and be both conceived to the Separation and Recovery of sump oil, be conceived to again discharge shale subtract hold decrement time, various method all exposes certain limitation, effective process of this kind of mixing sludge system there is no maturation method, also without the report specially for this.Therefore, modified breakdown of emulsion, desorption, separation, the concentrated moisture percentage in sewage sludge that reduces subtracts appearance, carries out effective joint disposal, has become that oil field ground system cloud gray model under the new situation becomes more meticulous, a problem urgently to be resolved hurrily of low carbonization.
Summary of the invention
The object of this invention is to provide a kind of oily sludge minimizing treatment process, this oily sludge minimizing treatment process is not suitable with for solving prior art and produce mud to dredged sediment at the bottom of the tank of oil field under new development situation, sewage disposal and landing the system that the coexists process of oily sludge, and be difficult to take into account sump oil Separation and Recovery and discharge shale subtract the problem holding decrement, another object of the present invention is to provide the device that oily sludge minimizing treatment process uses.
The technical solution adopted for the present invention to solve the technical problems is: this oily sludge minimizing treatment process:
(1) fluidization of sludge system and pre-treatment: sludge material is transported in cast hopper by worm conveyor, start the cutting type mechanical stirrer in cast hopper, and the magnetic valve opening high-pressure nozzle returns and mixes recirculated water in cast hopper, the liquefaction sewage sludge material that granularity is less than 50mm flows to fluidisation pre-treatment tank by mechanical grille through cast hopper outlet at bottom, simultaneously, by the water ratio of online tester for water ratio monitoring oily sludge system, control back the magnetic valve mixing recirculated water, make the oily sludge system water ratio of remittance fluidisation pre-treatment tank maintain about 95%; Open the heated for controlling temperature system of fluidisation pre-treatment tank, temperature controls at 40 ~ 45 DEG C, and opens the stirring of pre-separation indoor, is realized the abundant aeration of pre-separation indoor by external blast aeration blower fan; Isolating sump oil scrapes into collection tank by the Oil scraper of fluidisation pre-treatment tank top, and the mechanical grille that liquefaction sewage sludge is then not more than 15mm by grid gap enters mud collecting chamber;
(2) the modified breakdown of emulsion of sludge system: when the liquefaction sewage sludge of fluidisation pre-treatment tank mud collecting chamber to be pumped into the modified breakdown of emulsion treatment tank of one-level by spiral pump, first clean-out system is added at tank entrance by dosing pump, open the coil pipe heated for controlling temperature system bottom the modified breakdown of emulsion treatment tank of one-level, temperature controls at 45 ~ 50 DEG C, and starting agitator, the homogenize carrying out sludge system within the residence time of 30 ~ 60min is modified, breakdown of emulsion desorption; Sludge system after the modified breakdown of emulsion of one-level is delivered to the modified breakdown of emulsion treatment tank of secondary back taper from pot bottom by spiral pump, open the coil pipe heated for controlling temperature system of the modified breakdown of emulsion treatment tank of secondary back taper, temperature controls at 50 ~ 60 DEG C, desorption isolated upper strata sump oil is scraped into collection tank by the Oil scraper at secondary back taper modified breakdown of emulsion treatment tank top, sludge system then imports the back taper portion of the modified breakdown of emulsion treatment tank of secondary, by perforated pipe spoil disposal;
(3) sludge system is ultrasonic de-steady: by spiral pump, the sludge system after modified breakdown of emulsion process is pumped into ultrasonic de-steady tank, open the coil pipe heated for controlling temperature system of ultrasonic de-steady pot bottom, temperature controls at 50 ~ 60 DEG C, open ultrasonic generator, given off the high frequency machinery Sasser of density interphase by ultrasonic oscillator, and carry out abundant aeration by external blast aeration blower fan in ultrasonic de-steady tank bottom; The sump oil that idetified separation goes out enters collection tank, and middle portion interstitial water and a small amount of absorption free water layer are discharged by water shoot, and surely de-and sludge system after sedimentation layering free-water then imports the bottom of ultrasonic de-steady tank;
(4) mechanical centrifugal of sludge system: the concentrated appearance sludge system that subtracts of ultrasonic de-steady pot bottom is promoted to two-phase horizontal screw centrifuge by spiral pump, the solid-liquid separation decrement of mud is realized under centrifugal action, the sludge solids be separated after decrement is transported to stores up a mummification, centrifugally go out to import circulation water pot containing trace or the oily sewage of vestige, further subsiding and purifying, and meet recycling in this technical scheme via interchanger.
After in such scheme step one, feed hopper bottom outlet outflow hauled oneself willingly into by liquefaction sewage sludge material, by lower to stream pipeline section along tilting to flow to fluidisation pre-treatment tank in downward direction, and flow into fluidisation pre-treatment tank along the inclined wall of fluidisation pre-treatment tank, can prevent the heap of silt particle (sinking) from amassing like this, online tester for water ratio is arranged on lower on stream pipeline section.
The sump oil that in such scheme, each step is separated all receives oil skimming tank, and draining all imports circulation water pot, and recycles as time water mixing or rinse water.
In such scheme, sludge material is dredged sediment at the bottom of tank, or sewage disposal produces mud, or lands oily sludge or its mixed system that coexists.
In such scheme, in step one, the on-line monitoring of oily sludge system water ratio adopts near infrared spectroscopic method.
The device that above-mentioned oily sludge minimizing treatment process uses comprises cast hopper, fluidisation pre-treatment tank, the modified breakdown of emulsion treatment tank of one-level, the modified breakdown of emulsion treatment tank of secondary back taper, ultrasonic de-steady tank, two-phase horizontal screw centrifuge, automatic control cabinet, worm conveyor, worm conveyor is obliquely installed, its upper end discharge port is placed on cast hopper, installation high-voltage shower nozzle above cast hopper, large grid gap mechanical grille is set bottom cast hopper, cutting type mechanical stirrer is arranged on above large grid gap mechanical grille, bottom cast hopper, outlet is set, to flowing pipeline section under installing between this outlet and fluidisation pre-treatment tank, online tester for water ratio is arranged on lower on stream pipeline section, fluidisation pre-treatment tank is divided into pre-separation room and mud collecting chamber, fluidisation pre-treatment tank entrance is arranged on the position of pre-separation room 2/3 height, it is inclined wall under entrance, micro porous aeration head is arranged on the position of pre-separation room 1/3 height by radial disk type, to be that the aeration head of 3mm and 5mm is alternate successively equidistantly distribute by 10mm micro-pore diameter, blast aeration blower fan is connected by flexible pipe with the micro porous aeration head of pre-separation indoor, agitator is arranged on below micro porous aeration head, mud collecting chamber top arranges little grid gap mechanical grille, arranges heated for controlling temperature system around fluidisation pre-treatment tank tube wall, mud collecting chamber is connected with the modified breakdown of emulsion treatment tank of one-level, and one-level modified breakdown of emulsion treatment tank source line bypass arranges dosing pump, arranges coil pipe heated for controlling temperature system bottom the modified breakdown of emulsion treatment tank of one-level, and agitator is installed at top, one-level modified breakdown of emulsion treatment tank is connected with the modified breakdown of emulsion treatment tank of secondary back taper, around the tube wall of the modified breakdown of emulsion treatment tank of secondary back taper, coil pipe heated for controlling temperature system is set, Oil scraper is installed at top, top is cylindrical portion, bottom is back taper portion, and back taper portion is laminated type perforated sludge discharge pipe around the home from bottom to top, perforated sludge discharge pipe is connected with ultrasonic de-steady tank, ultrasonic de-steady tank inside trumpet type ultrasonic vibrator, ultrasonic generator is connected with trumpet type ultrasonic vibrator by cable, arranges micro porous aeration head below trumpet type ultrasonic vibrator, and ultrasonic de-steady pot bottom arranges coil pipe heated for controlling temperature system, ultrasonic de-steady tank is connected with two-phase horizontal screw centrifuge.
In such scheme, fluidisation pre-treatment tank tank deck has opening, and Telescopic high-pressure shower nozzle is installed in the top of opening, and Telescopic high-pressure shower nozzle can enter or leave fluidisation pre-treatment tank from opening part, in order to the regular cleaning to mechanical grille.
The device that in such scheme, oily sludge minimizing treatment process uses also comprises oil skimming tank, circulation water pot, interchanger, and the collection tank of the collection tank of fluidisation pre-treatment tank, the collection tank of secondary back taper modified breakdown of emulsion treatment tank, ultrasonic de-steady tank is all connected with oil skimming tank by collection tube; Secondary back taper modified breakdown of emulsion treatment tank cylindrical portion draws water shoot, and water shoot is connected to circulation water pot, and draw water shoot in the middle part of ultrasonic de-steady tank, this water shoot is also connected to circulation water pot; Circulation water pot connects interchanger, and interchanger connects the high-pressure nozzle above cast hopper and the Telescopic high-pressure shower nozzle above fluidisation pre-treatment tank respectively by pipeline, and each pipeline installs magnetic valve respectively.
In such scheme, the grid gap of large grid gap mechanical grille is 50mm; The grid gap of little grid gap mechanical grille is 15mm; The pitch angle of fluidisation pre-treatment tank inclined wall is 135o, and the volumetric ratio of pre-separation room and mud collecting chamber is 3:1; The modified breakdown of emulsion treatment tank of secondary back taper is the design of 120o reversed cone angle, and the volumetric ratio in cylindrical portion and back taper portion is 2:1.
In such scheme, trumpet type ultrasonic vibrator has three groups, and three prescription quarter bends are radial parallel to be welded on the inwall of more than ultrasonic de-steady tank water shoot, often organizes trumpet type ultrasonic vibrator and equidistantly to distribute layout by 150 ~ 200mm on square tube; Aeration head aperture in ultrasonic de-steady tank is 5mm, and be arranged on the position of 1/4 height in tank by the equidistant radial disk type of 10mm, water shoot is located at the position of tank body 1/2 height.
The present invention has following beneficial effect:
(1) the present invention can remove Large stone colloid, impurity to the fluidisation of sludge system and pre-treatment, thus raising processing efficiency, reduce the load of subsequent processing units simultaneously, reduce the wearing and tearing that may bring, widen the adaptability of system process that oil field different sources, different properties oily sludge coexisted; Spraying water with high pressure and under churned mechanically acting in conjunction, dry greasy filth can be hit and broken, is aided with heating, reduce gel strength, by plastic state or solid-stately change fluidized into completely, the mobility of system is substantially improved, for effective breakdown of emulsion, desorption, is separated and subtracts to hold and create prerequisite; Arrange the Fast transforms at aeration head promotion " solution-air " interface that large small-bore is alternate, overcome liquid film obstacle, strengthen the turbulence level of fluidisation sludge system, improve its pretreating effect.
(2) the present invention is in fluidisation and pretreated basis, high sticky, the adsorbed oil breakdown of emulsion of strong stability, desorption in oily sludge three-phase mixture system can be made to the modified breakdown of emulsion of sludge system, effective promotion oil is thoroughly separated from solid phase particles surface, be aided with perforated pipe simultaneously and concentrate spoil disposal, ensure that removing of portion void water, and the reduction of mud granule surface adsorption water strong adhesive force, reach the effect of initial concentration.
(3) the present invention is after to the modified breakdown of emulsion of sludge system, based on hyperacoustic " cavitation effect ", carry out ultrasound-enhanced separation further, high frequency that ultrasonic vibrator sends machinery Sasser can density interphase ground forward directed radiation in sludge system, produce ten hundreds of small bubbles, these bubbles can close instantaneously, form the surface of the successive Ground shock waves mud of high pressure, reinforcement sludge particle surface is difficult to peeling off of desorption surplus oil, be aided with aeration, make greasy filth Homogeneous phase mixing, ensure that ultrasonic wave fully acts on sludge system, and the residence time in sphere of action, and then reduce the stability of system, reach oil, water, mud three-phase mixture takes off steady effect, substantially improve desorption, be separated, concentrate and subtract appearance effect.
(4) the present invention is via fluidisation pre-treatment, modified breakdown of emulsion, after ultrasonic de-steady physico-chemical processes desorption volume reduction treatment, mechanical centrifugal is carried out to sludge system, interstitial water is isolated further by densification centrifugation, by the mutual extruding between mud granule, collision, flocculation, remove surface adsorption water to a greater extent, also the stability of mud granule internal junction Heshui and existence form thereof are impacted simultaneously, thus gradual realization and ensure to different sources, what different properties oily sludge coexisted the at utmost Separation and Recovery of sump oil in system and discharge shale at utmost subtracts appearance decrement, form breaking sludge process and the scientific and effective technological method hoarding a difficult problem in a set of oil field ground technique.
(5) the inventive method science, definite principle, feasible, rational in infrastructure, technical parameter specification, adjustable, to break through sewage disposal produce the limitation of sludge treatment, be applicable to dredged sediment at the bottom of the tank of oil field, land oily sludge, sewage disposal and produce desorption, the volume reduction treatment of mud and the system that coexists thereof, science is solved effectively sump oil Separation and Recovery and discharge shale in oily sludge system and subtract the problem holding decrement, operability and practical.
(6) the present invention filled up that process for treating oil-containing sludge under oil field high water-cut development period and complicated oil production method is single, treatment process bad adaptability, treating processes there is no carry out scientificly defining for sludge source and characteristic, treatment effect is difficult to take into account sump oil Separation and Recovery and discharge shale subtract the blank holding decrement, can determine to provide scientific basis for the optimization of critical process in industrial production operation, adjustment and parameter, both can be applicable to field produces research field, other field closely-related with the Industrial emissions comprehensive regulation such as chemical industry, environmental protection can have been promoted the use of again.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the A-A vertical view of Fig. 1;
Fig. 3 is the B-B vertical view of Fig. 1;
Fig. 4 is the C-C vertical view of Fig. 1.
In figure: the ultrasonic de-steady tank 5 two-phase horizontal screw centrifuge 6 of 1 fluidisation pre-treatment tank 2 one-level modified breakdown of emulsion treatment tank 3 secondary back taper modified breakdown of emulsion treatment tank 4 circulates little grid gap mechanical grille 25 Oil scraper 26 collection tank 27 coil pipe heated for controlling temperature system 28 perforated sludge discharge pipe 29 ultrasonic generator 30 trumpet type ultrasonic vibrator 31 collection tube 32 water shoot of water pot 7 interchanger 8 oil skimming tank 9 automatic control cabinet 10 worm conveyor 11 blast aeration blower fan 12 heated for controlling temperature system 13 cast hopper 14 high-pressure nozzle 15 cutting type mechanical stirrer 16 large grid gap mechanical grille 17 18 agitator 19 micro porous aeration head 20 Telescopic high-pressure shower nozzle 21 pre-separation room 22 mud collecting chamber 23 feet 24.
Embodiment
The present invention is further illustrated below:
As shown in Figure 1, this oily sludge minimizing treatment process:
(1) by worm conveyor 10 by sludge material (dredged sediment at the bottom of tank, or sewage disposal produces mud, or land oily sludge, or its mixed system that coexists) be transported in cast hopper 13, start the cutting type mechanical stirrer 15 in cast hopper 13, and the electromagnetic valve opening high-pressure nozzle 14 returns and mixes recirculated water in cast hopper 13, the liquefaction sewage sludge material that granularity is less than 50mm flows to fluidisation pre-treatment tank 1 by large grid gap mechanical grille 16; Meanwhile, by the water ratio of online tester for water ratio monitoring oily sludge system, control back the electromagnetic valve mixing recirculated water, make the oily sludge system water ratio of remittance fluidisation pre-treatment tank 1 maintain about 95%; Open the heated for controlling temperature system 12 of fluidisation pre-treatment tank 1, make temperature maintain 40 ~ 45 DEG C, and open the agitator 18 in pre-separation room 21, realized the abundant aeration in pre-separation room 21 by external blast aeration wind 11 machine; Isolate sump oil to be scraped into collection tank 26 by the Oil scraper 25 at fluidisation pre-treatment tank 1 top, then drain into oil skimming tank 8 by collection tube 31, the little grid gap mechanical grille 24 that liquefaction sewage sludge is then not more than 15mm by grid gap enters mud collecting chamber 22.Realize fluidization and the pre-treatment of sludge system thus.
(2) by spiral pump, the liquefaction sewage sludge of fluidisation pre-treatment tank 1 mud collecting chamber 22 is pumped into the modified breakdown of emulsion treatment tank 2 of one-level, clean-out system is added by dosing pump at tank entrance, open the coil pipe heated for controlling temperature system 27 bottom the modified breakdown of emulsion treatment tank 2 of one-level, temperature is made to maintain 45 ~ 50 DEG C, and starting agitator, the homogenize carrying out sludge system within the residence time of 30 ~ 60min is modified, breakdown of emulsion desorption; Sludge system after the modified breakdown of emulsion of one-level is delivered to the modified breakdown of emulsion treatment tank 3 of secondary back taper by spiral pump again from pot bottom, open the coil pipe heated for controlling temperature system of the modified breakdown of emulsion treatment tank 3 of secondary back taper, temperature is made to maintain 50 ~ 60 DEG C, desorption isolated upper strata sump oil is scraped into collection tank 26 by the Oil scraper 25 at secondary back taper modified breakdown of emulsion treatment tank 3 top, oil skimming tank 8 is drained into again by collection tube 31, sludge system then imports the back taper portion of the modified breakdown of emulsion treatment tank 3 of secondary back taper, by perforated sludge discharge pipe 28 spoil disposal.Realize the modified breakdown of emulsion of sludge system thus.
(3) spiral pump is utilized the sludge system after modified breakdown of emulsion process to be pumped into ultrasonic de-steady tank 4, open the coil pipe heated for controlling temperature system bottom ultrasonic de-steady tank 4, temperature is made to maintain 50 ~ 60 DEG C equally, open ultrasonic generator 29, trumpet type ultrasonic vibrator 30 gives off the high frequency machinery Sasser of density interphase, and carries out abundant aeration by external blast aeration blower fan 11 in ultrasonic de-steady tank 4 bottom; The sump oil that idetified separation goes out enters collection tank 26, oil skimming tank 8 is drained into equally by collection tube 31, portion void water and a small amount of adsorbed water layer drain into circulation water pot 6 by water shoot 32, and the sludge system after de-steady also sedimentation layering free-water then imports the bottom of ultrasonic de-steady tank 4.Realize the ultrasonic de-steady idetified separation of sludge system thus.
(5) by spiral pump, the concentrated appearance sludge system that subtracts bottom ultrasonic de-steady tank 4 is promoted to two-phase horizontal screw centrifuge 5, the solid-liquid separation decrement of mud is realized under centrifugal action, the sludge solids be separated after decrement is transported to stores up a mummification, centrifugally go out to import circulation water pot 6 containing trace or the oily sewage of vestige, further subsiding and purifying, and meet recycling in this technical scheme via interchanger 7.Realize the emchanically centrifugal separation of sludge system thus.
This invention is five-step approach, for oil field different sources mud and different qualities thereof, can gradual realization and ensure the at utmost Separation and Recovery of sump oil in oily sludge system and discharge shale at utmost subtract appearance decrement, build and to crack under new development situation sludge treatment and the scientific and effective method of hoarding a difficult problem in oil field ground technique.
The device that the method for this oily sludge minimizing process uses comprises the inclined bottom surface formula fluidisation pre-treatment tank 1 with a feet 23, cast hopper 13 is connected to flowing pipeline section by lower with fluidisation pre-treatment tank 1, worm conveyor 10 is adopted to realize sludge material to the transmission in cast hopper 13, installation high-voltage shower nozzle 14 above cast hopper 13, it is connected by pipeline with the pump discharge of interchanger 7, and control aperture with electromagnetic valve, plastic state or solid-state oily sludge material are changed to fluidized, large grid gap mechanical grille 16 is set bottom cast hopper 13 to retain the liquefaction sewage sludge material that granularity is greater than 50mm, adopt simultaneously the broken large grid gap mechanical grille 16 of cutting type mechanical stirrer 15 retain dry, macrobead, the greasy filth component of high gel strength, online tester for water ratio 17 is arranged on cast hopper 13 with the form that transmission fibre-optical probe is right and connects with pre-separation room 21 lower to flowing the along the line of pipeline section, fluidisation pre-treatment tank 1 is divided into pre-separation room 21 and mud collecting chamber 22 two portions, around tube wall below itself and cast hopper 13 joint, heated for controlling temperature system 12 is set, in pre-separation room 21, agitator 18 is installed, blast aeration blower fan 11 is connected by flexible pipe with the micro porous aeration head 19 in pre-separation room 21, mud collecting chamber 22 top arranges the little grid gap mechanical grille 24 that grid gap is 15mm, be separated remaining macrobead, macrofiber matter, Oil scraper 25 is installed at fluidisation pre-treatment tank 1 top, collection tank 26 is connected with oil skimming tank 8 by collection tube 32, Telescopic high-pressure shower nozzle 20 is installed at fluidisation pre-treatment tank 1 top, be connected with the pump discharge pipeline of interchanger 7 by electromagnetic valve equally, in order to the regular cleaning to little grid gap mechanical grille 24, using spiral pump as propulsion source, by pipeline, the mud collecting chamber 22 of fluidisation pre-treatment tank 1 is connected with the modified breakdown of emulsion treatment tank 2 of one-level, one-level modified breakdown of emulsion treatment tank 2 source line bypass arranges dosing pump to add the clean-out system of chemical conditioning breakdown of emulsion, bottom arranges coil pipe heated for controlling temperature system 27, the homogenize that agitator 18 realizes system in tank is installed at top, modified, same using spiral pump as propulsion source, by pipeline, modified for one-level breakdown of emulsion treatment tank 2 is connected with the modified breakdown of emulsion treatment tank 3 of the secondary back taper being provided with feet 23, around the tube wall of the modified breakdown of emulsion treatment tank 3 of secondary back taper, coil pipe heated for controlling temperature system is set, Oil scraper 25 is installed at top, the laminated type perforated sludge discharge pipe 28 around the home from bottom to top in back taper portion, water shoot 32 is drawn in cylindrical portion, be connected to circulation water pot 6, collection tank 26 is connected with oil skimming tank 8 by collection tube 31 equally, perforated sludge discharge pipe 28 in secondary back taper modified breakdown of emulsion treatment tank 3 is connected with ultrasonic de-steady tank 4 via spiral pump, bottom ultrasonic de-steady tank 4, coil pipe heated for controlling temperature system is set, ultrasonic generator 29 is connected with three groups of trumpet type ultrasonic vibrators 30 successively by cable, blast aeration blower fan 11 is connected by flexible pipe with the micro porous aeration head 19 bottom ultrasonic de-steady tank 4, collection tank 26 is connected to oil skimming tank 8 by collection tube 31, draw water shoot 32 in the middle part of ultrasonic de-steady tank 4, be connected to circulation water pot 6, ultrasonic de-steady tank 4 is connected with two-phase horizontal screw centrifuge 5 by pipeline via spiral pump, and water shoot 32 is connected to circulation water pot 6, and all electric installations are all connected to automatic control cabinet 9.
Fig. 2 is the A-A vertical view of Fig. 1, it provide the arrangement schematic diagram of micro porous aeration head 19 in pre-separation room 21, as shown in the figure, micro porous aeration head 19 is arranged on the position of 1/3 height in pre-separation room 21 by radial disk type, the aeration head of micro-pore diameter 3mm, 5mm is alternate successively equidistantly to distribute by 10mm, the Fast transforms at aeration head promotion " solution-air " interface that large small-bore is alternate, overcome liquid film obstacle, strengthen the turbulence level of fluidisation sludge system, improve pre-breakdown of emulsion, the desorption effect of its pretreatment stage elaioleucite.
Fig. 3 is the B-B vertical view of Fig. 1, it provide perforated sludge discharge pipe 33 in laminated type structural representation around the home, as shown in the figure, the perforated sludge discharge pipe 28 of caliber 150mm, eye diameter 35mm, in back taper portion, laminated type is around the home from bottom to top, fixed by the wedge shape hook being welded on inwall for every layer, give full play to the effect of concentrating concentrated spoil disposal, in guarantee sludge system, interstitial water removes, and the reduction of mud granule surface adsorption water strong adhesive force, reach the effect of modified break milk separation and initial concentration, be conducive to smooth and easy spoil disposal simultaneously.
Fig. 4 is the C-C vertical view of Fig. 1, it provide the arrangement schematic diagram of trumpet type ultrasonic vibrator 28, as shown in the figure, three prescription quarter bends are radial parallel is welded on the inwall of ultrasonic de-steady tank 4 water shoot more than 32, and trumpet type ultrasonic vibrator 28 equidistantly to distribute layout by 150 ~ 200mm on square tube.
In the present invention, online tester for water ratio adopts single fiber bundle multi-channel measurement near infrared spectrum, the sludge system water ratio in on-line monitoring cast hopper 13 and pre-separation room 21 section of connecting two sites along the line, so that obtain liquefaction sewage sludge material average moisture content more accurately, differentiate the fluidising effect of oily sludge.
Adopt the method for oily sludge minimizing process of the present invention and device to carry out confidentiality test, table 1 is the source transitivity of oily sludge system:
The source transitivity of process oily sludge tested by table 1
| Oily sludge is originated | Water content, % | Oleaginousness, % | Silt content, % | Capacity ratio, % |
| Sewage plant air flotation tank | 87.63 | 1.24 | 11.13 | 56 |
| Desilting mud at the bottom of tank | 5.72 | 62.54 | 31.74 | 20 |
| Land mud | 29.05 | 9.67 | 61.28 | 24 |
Calculate the following significant parameter of design according to this oily sludge system composition and scale to test:
Cast hopper 13 volume 3m
3, fluidisation pre-treatment tank 1 volume 15m
3, temperature control 42 DEG C, one-level modified breakdown of emulsion treatment tank 2 volume 10m
3, temperature control 46 DEG C, secondary back taper modified breakdown of emulsion treatment tank 3 volume 15m
3, temperature control 52 DEG C, ultrasonic de-steady tank 4 volume 8m
3, temperature control 52 DEG C, oil skimming tank 8 volume 5m
3, circulation water pot 6 volume 30m
3, spiral pump displacement range 0 ~ 15m
3/ h, range of lift 0 ~ 20m, one-level modified breakdown of emulsion treatment tank 2 entrance clean-out system dosage 1%.
In above-mentioned experiment, the coexist average moisture content of system of oily sludge is 57.19%, Average oil concentration is 15.52%, average silt content is 27.29%, after the inventive method process, in discharge mud, oleaginousness is that 0.73%(is less than 1%), water content is that 66.8%(is less than 70%), reach sump oil desorption, break milk separation and the moisture object realizing reducing sludge volume decrement of reduction, show that the technical program is adapted to dredged sediment at the bottom of the tank of oil field under new development situation, sewage disposal produces mud and the system that coexists of oily sludge of landing, thus breaking sludge process with hoard a difficult problem.
Claims (10)
1. an oily sludge minimizing treatment process, is characterized in that: this oily sludge minimizing treatment process:
(1) fluidization of sludge system and pre-treatment: sludge material is transported in cast hopper (13) by worm conveyor (10), start the cutting type mechanical stirrer (15) in cast hopper (13), and the magnetic valve opening high-pressure nozzle (14) returns and mixes recirculated water in cast hopper (13), the liquefaction sewage sludge material that granularity is less than 50mm flows to fluidisation pre-treatment tank (1) by large grid gap mechanical grille (16) through cast hopper (13) outlet at bottom, simultaneously, by the water ratio of online tester for water ratio monitoring oily sludge system, control back the magnetic valve mixing recirculated water, the oily sludge system water ratio of remittance fluidisation pre-treatment tank (1) is made to maintain about 95%, open the heated for controlling temperature system (12) of fluidisation pre-treatment tank (1), temperature controls at 40 ~ 45 DEG C, and opens the stirring in pre-separation room (21), is realized the abundant aeration of pre-separation indoor by external blast aeration blower fan (11), isolating sump oil scrapes into collection tank (26) by the Oil scraper (25) at fluidisation pre-treatment tank (1) top, and the little grid gap mechanical grille (24) that liquefaction sewage sludge is then not more than 15mm by grid gap enters mud collecting chamber (22),
(2) the modified breakdown of emulsion of sludge system: when the liquefaction sewage sludge of fluidisation pre-treatment tank (1) mud collecting chamber (22) is pumped into one-level modified breakdown of emulsion treatment tank (2) by spiral pump, first clean-out system is added at tank entrance by dosing pump, open the coil pipe heated for controlling temperature system (12) of modified breakdown of emulsion treatment tank (2) bottom of one-level, temperature controls at 45 ~ 50 DEG C, and starting agitator (18), the homogenize carrying out sludge system within the residence time of 30 ~ 60min is modified, breakdown of emulsion desorption; Sludge system after the modified breakdown of emulsion of one-level is delivered to the modified breakdown of emulsion treatment tank (3) of secondary back taper from pot bottom by spiral pump, open the coil pipe heated for controlling temperature system (12) of the modified breakdown of emulsion treatment tank (3) of secondary back taper, temperature controls at 50 ~ 60 DEG C, desorption isolated upper strata sump oil is scraped into collection tank (26) by the Oil scraper (25) at secondary back taper modified breakdown of emulsion treatment tank (3) top, sludge system then imports the back taper portion of the modified breakdown of emulsion treatment tank (3) of secondary, by perforated sludge discharge pipe (28) spoil disposal;
(3) sludge system is ultrasonic de-steady: by spiral pump, the sludge system after modified breakdown of emulsion process is pumped into ultrasonic de-steady tank (4), open the coil pipe heated for controlling temperature system (27) of ultrasonic de-steady tank (4) bottom, temperature controls at 50 ~ 60 DEG C, open ultrasonic generator (29), given off the high frequency machinery Sasser of density interphase by ultrasonic oscillator, and carry out abundant aeration by external blast aeration blower fan (11) in ultrasonic de-steady tank (4) bottom; The sump oil that idetified separation goes out enters collection tank (26), and middle portion interstitial water and a small amount of absorption free water layer are discharged by water shoot (32), takes off the bottom that steady and after sedimentation layering free-water sludge system then imports ultrasonic de-steady tank (4);
(4) mechanical centrifugal of sludge system: the concentrated appearance sludge system that subtracts of ultrasonic de-steady tank (4) bottom is promoted to two-phase horizontal screw centrifuge (5) by spiral pump, the solid-liquid separation decrement of mud is realized under centrifugal action, the sludge solids be separated after decrement is transported to stores up a mummification, centrifugally go out to import circulation water pot (6) containing trace or the oily sewage of vestige, further subsiding and purifying, and recycle via interchanger (7).
2. oily sludge minimizing treatment process according to claim 1, it is characterized in that: described liquefaction sewage sludge material is after cast hopper (13) outlet at bottom flows out, by lower to stream pipeline section along tilting to flow to fluidisation pre-treatment tank (1) in downward direction, and flow into fluidisation pre-treatment tank (1) along the inclined wall of fluidisation pre-treatment tank (1).
3. oily sludge minimizing treatment process according to claim 2, is characterized in that: the sump oil that described each step is separated all receives oil skimming tank (8), and draining all imports circulation water pot (6), and recycles as time water mixing or rinse water.
4. oily sludge minimizing treatment process according to claim 3, is characterized in that: described sludge material is dredged sediment at the bottom of tank, or sewage disposal produces mud, or lands oily sludge or its mixed system that coexists.
5. oily sludge minimizing treatment process according to claim 4, is characterized in that: the on-line monitoring of described oily sludge system water ratio adopts near infrared spectroscopic method.
6. the device of an oily sludge minimizing treatment process use according to claim 2, it is characterized in that: the device that this oily sludge minimizing treatment process uses comprises cast hopper (13), fluidisation pre-treatment tank (1), the modified breakdown of emulsion treatment tank (2) of one-level, the modified breakdown of emulsion treatment tank (3) of secondary back taper, ultrasonic de-steady tank (4), two-phase horizontal screw centrifuge (5), automatic control cabinet (9), worm conveyor (10), worm conveyor (10) is obliquely installed, its upper end discharge port is placed on cast hopper (13), cast hopper (13) top installation high-voltage shower nozzle (14), cast hopper (13) bottom arranges large grid gap mechanical grille (16), cutting type mechanical stirrer (15) is arranged on large grid gap mechanical grille (16) top, cast hopper (13) bottom arranges outlet, to flowing pipeline section under installing between this outlet and fluidisation pre-treatment tank (1), online tester for water ratio is arranged on lower on stream pipeline section, fluidisation pre-treatment tank (1) is divided into pre-separation room (21) and mud collecting chamber (22), fluidisation pre-treatment tank (1) entrance is arranged on the position of pre-separation room (21) 2/3 height, it is inclined wall under entrance, micro porous aeration head (19) is arranged on the position of pre-separation room (21) 1/3 height by radial disk type, to be that the aeration head of 3mm and 5mm is alternate successively equidistantly distribute by 10mm micro-pore diameter, blast aeration blower fan (11) is connected by flexible pipe with the micro porous aeration head (19) of pre-separation indoor, agitator (18) is arranged on micro porous aeration head (19) below, mud collecting chamber (22) top arranges little grid gap mechanical grille (24), heated for controlling temperature system (12) is set around fluidisation pre-treatment tank (1) tube wall, mud collecting chamber (22) is connected with the modified breakdown of emulsion treatment tank (2) of one-level, one-level modified breakdown of emulsion treatment tank (2) source line bypass arranges dosing pump, modified breakdown of emulsion treatment tank (2) bottom of one-level arranges coil pipe heated for controlling temperature system (27), and agitator (18) is installed at top, one-level modified breakdown of emulsion treatment tank (2) is connected with the modified breakdown of emulsion treatment tank (3) of secondary back taper, around the tube wall of the modified breakdown of emulsion treatment tank (3) of secondary back taper, coil pipe heated for controlling temperature system (12) is set, Oil scraper (25) is installed at top, top is cylindrical portion, bottom is back taper portion, and back taper portion is laminated type perforated sludge discharge pipe (28) around the home from bottom to top, perforated sludge discharge pipe (28) is connected with ultrasonic de-steady tank (4), ultrasonic de-steady tank (4) inside trumpet type ultrasonic vibrator (30), ultrasonic generator (29) is connected with trumpet type ultrasonic vibrator (30) by cable, trumpet type ultrasonic vibrator (30) below arranges micro porous aeration head (19), and ultrasonic de-steady tank (4) bottom arranges coil pipe heated for controlling temperature system (27), ultrasonic de-steady tank (4) is connected with two-phase horizontal screw centrifuge (5).
7. the device of oily sludge minimizing treatment process use according to claim 6, it is characterized in that: described fluidisation pre-treatment tank (1) tank deck has opening, Telescopic high-pressure shower nozzle (20) is installed in the top of opening, and Telescopic high-pressure shower nozzle (20) can enter or leave fluidisation pre-treatment tank (1) from opening part.
8. the device of oily sludge minimizing treatment process use according to claim 7, it is characterized in that: the device that described oily sludge minimizing treatment process uses also comprises oil skimming tank (8), circulation water pot (6), interchanger (7), the collection tank (26) of the collection tank (26) of fluidisation pre-treatment tank (1), the collection tank (26) of secondary back taper modified breakdown of emulsion treatment tank (3), ultrasonic de-steady tank (4) is all connected with oil skimming tank (8) by collection tube (31); Secondary back taper modified breakdown of emulsion treatment tank (3) cylindrical portion draws water shoot (32), and water shoot (32) is connected to circulation water pot (6), and water shoot (32) is drawn at ultrasonic de-steady tank (4) middle part, and this water shoot (32) is also connected to circulation water pot (6); Circulation water pot (6) connects interchanger (7), and interchanger (7) connects the high-pressure nozzle (14) of cast hopper (13) top and the Telescopic high-pressure shower nozzle (20) of fluidisation pre-treatment tank (1) top respectively by pipeline, and each pipeline installs magnetic valve respectively.
9. the device of oily sludge minimizing treatment process use according to claim 8, is characterized in that: the grid gap of described large grid gap mechanical grille (16) is 50mm; The grid gap of little grid gap mechanical grille (24) is 15mm; The pitch angle of fluidisation pre-treatment tank (1) inclined wall is 135o, and the volumetric ratio of pre-separation room (21) and mud collecting chamber (22) is 3:1; The modified breakdown of emulsion treatment tank (3) of secondary back taper is designed in 120o reversed cone angle, and the volumetric ratio in cylindrical portion and back taper portion is 2:1.
10. the device of oily sludge minimizing treatment process use according to claim 9, it is characterized in that: described trumpet type ultrasonic vibrator (30) has three groups, three prescription quarter bends are radial parallel to be welded on the inwall of more than ultrasonic de-steady tank (4) water shoot (32), often organizes trumpet type ultrasonic vibrator (30) and equidistantly to distribute layout by 150 ~ 200mm on square tube; Aeration head aperture in ultrasonic de-steady tank (4) is 5mm, and be arranged on the position of 1/4 height in tank by the equidistant radial disk type of 10mm, water shoot (32) is located at the position of tank body 1/2 height.
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| CN105668961A (en) * | 2016-03-09 | 2016-06-15 | 北京天灏柯润环境科技有限公司 | Sludge treatment device and method |
| CN106194078A (en) * | 2016-07-19 | 2016-12-07 | 大庆市乾晟机械制造有限公司 | Drilling mud does not land processing means |
| CN106396320A (en) * | 2016-12-13 | 2017-02-15 | 大庆市海油庆石油科技有限公司 | Movable oil field oily sludge biological tempering separation treatment device |
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| CN109264946A (en) * | 2018-11-28 | 2019-01-25 | 知合环境（北京）有限责任公司 | A kind of method of step depth separation oily sludge |
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| CN115703664A (en) * | 2021-08-13 | 2023-02-17 | 深圳职业技术学院 | Device and method for treating oily sludge by using metal-rich biochar |
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