CN115403181B - Oilfield produced water treatment system - Google Patents

Oilfield produced water treatment system Download PDF

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Publication number
CN115403181B
CN115403181B CN202211020949.9A CN202211020949A CN115403181B CN 115403181 B CN115403181 B CN 115403181B CN 202211020949 A CN202211020949 A CN 202211020949A CN 115403181 B CN115403181 B CN 115403181B
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China
Prior art keywords
reaction tank
tank
movable
gel breaking
produced water
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CN202211020949.9A
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Chinese (zh)
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CN115403181A (en
Inventor
林坤华
刘亭
杨洁
邓祥武
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Chengdu Sukun Environmental Protection Technology Co ltd
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Chengdu Sukun Environmental Protection Technology Co ltd
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Priority to CN202211020949.9A priority Critical patent/CN115403181B/en
Publication of CN115403181A publication Critical patent/CN115403181A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/20Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281Installations for water purification using chemical agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/74Treatment of water, waste water, or sewage by oxidation with air
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/26Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention discloses an oilfield produced water treatment system, which comprises an adjusting tank, a decoloring reaction tank, a gel breaking reaction tank and a flocculation sedimentation tank which are sequentially communicated; the regulating tank is provided with a first stirrer, the decoloring reaction tank is internally provided with a second stirrer, and the gel breaking reaction tank is internally provided with a third stirrer; the decoloring reaction tank and the gel breaking reaction tank are provided with drug feeding ports; the bottom of the flocculation sedimentation tank is provided with a mud discharging device. The device can homogenize, decolor, break gel and flocculate the sedimentation treatment to the oilfield produced water through the cooperation of equalizing basin, decoloration reaction tank, broken gel reaction tank and flocculate sedimentation tank, and can effectively treat the oilfield produced water to make it meet the reinjection requirement.

Description

Oilfield produced water treatment system
Technical Field
The invention belongs to the technical field of oilfield produced water treatment, and particularly relates to an oilfield produced water treatment system.
Background
Oilfield produced water refers to water-containing crude oil produced from the subsurface, called "produced fluid", which is electrically dehydrated and separated, also called "oilfield sewage". Because of different conditions such as oil extraction method, crude oil characteristics, geology, etc., the quality of the oilfield produced water is different, and the oilfield produced water has specificity but commonality. About 5 hundred million m of the Chinese medicine needs to be treated every year 3 Most of the water is treated and used for reinjection oil extraction. In order to avoid degradation of polymer by cations in high-mineralization water and improve oil displacement effect, most of the current industrial production processes adopt low-mineralization clear water preparation and clear water dilution processes, thereby leading to the area of sewage water injectionImbalance. Meanwhile, the existing treatment system has poor treatment effect on oilfield produced water.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an oilfield produced water treatment system which can effectively purify oilfield produced water.
In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
an oilfield produced water treatment system comprises an adjusting tank, a decoloring reaction tank, a gel breaking reaction tank and a flocculation sedimentation tank which are sequentially communicated;
the regulating tank is provided with a first stirrer, the decoloring reaction tank is internally provided with a second stirrer, and the gel breaking reaction tank is internally provided with a third stirrer;
the decoloring reaction tank and the gel breaking reaction tank are provided with drug feeding ports; the bottom of the flocculation sedimentation tank is provided with a mud discharging device.
Further, the regulating tank, the decoloring reaction tank, the gel breaking reaction tank and the flocculation sedimentation tank are communicated through a water pump.
Further, a plurality of stirring blades are arranged on the first stirrer; the stirring blade comprises a straight section and a hollow section obliquely arranged on the straight section; a cutting member is arranged in the hollow section.
Further, a water inlet of the gel breaking reaction tank is provided with a flow guide piece; the diversion piece comprises a diversion pipe communicated with the water inlet; the flow guide pipe is provided with an air inlet pipe extending out of the gel breaking reaction tank, and a plurality of flow guide sheets with gaps are arranged in the flow guide pipe along the circumference of the flow guide pipe.
Further, the guide vane comprises a first guide vane, a second guide vane and a third guide vane; the first guide vane is positioned below the air inlet pipe and is used for guiding air.
Further, the gel breaking reaction tank is provided with a dosing port for adding gel breaker and flocculant respectively.
Further, a movable filter element and a movable part for driving the movable filter element to reciprocate are arranged in the flocculation sedimentation tank; one end of the movable filtering piece is hinged with the inner top of the flocculation sedimentation tank, and the other end of the movable filtering piece can freely slide in a chute arranged at the bottom of the flocculation sedimentation tank.
Further, the movable portion includes a housing; a rotary table capable of rotating under the drive of a motor and a movable plate matched with the rotary table are arranged in the shell; a column is fixedly arranged at the non-center of the turntable; the movable plate is provided with an arc-shaped groove in which the column body is embedded and can slide freely.
Further, a first rod body and a second rod body are respectively arranged on two sides of the movable plate; the first rod body or the second rod body drives the movable filter piece to slide in the gel breaking reaction tank.
Further, a mud discharging device is arranged at the Chi Waide part of the flocculation precipitation and comprises a mud discharging pump and a mud discharging pipe; the first rod body or the second rod body can stir the sludge at the bottom in the flocculation sedimentation tank and push the sludge to the sludge discharge pipe.
Further, a fixed filter element is also arranged in the flocculation sedimentation tank; the flocculation sedimentation tank is divided into different cavities by the movable filtering piece and the fixed filtering piece.
Further, the movable filter piece is a filter screen for filtering large-particle sediment; the fixed filter element is composed of a multi-media filter and a quartz filter, which are conventional in the art, and will not be described in detail herein.
The invention has the beneficial effects that:
1. the device can homogenize, decolor, break gel and flocculate the sedimentation treatment to the oilfield produced water through the cooperation of equalizing basin, decoloration reaction tank, broken gel reaction tank and flocculate sedimentation tank, and can effectively treat the oilfield produced water to make it meet the reinjection requirement.
2. Set up first agitator in the equalizing basin, through the mixing stirring of first agitator, can effectually be with the produced water misce bene in the equalizing basin, be provided with the cutting member in the stirring leaf of hollow structure, borrow the sharp blade of cutting member, can smash the large granule composition in the equalizing basin to a certain extent, also can produce the bubble in the stirring process for the water sample homogeneity effect is better.
3. The body of the flow guide pipe arranged in the flow guide piece is provided with a cavity, and the air inlet pipe can guide air to the cavityThe gas passing through the first flow sheet, the second flow sheet and the third flow sheet enters the flow guide pipe through the tail ends of the flow guide sheets and is mixed with the water body in the flow guide pipe, and in the process, micro bubbles generated by the gas are contacted and mixed with acidic components in the water body, so that the gas-liquid equilibrium relationship established by the dissolution of the acidic solution gas in the water can be changed, the partial pressure of the acidic solution gas is reduced, and the acidic solution gas in the acidic produced water of the oil field is continuously transferred to the gas phase, thereby realizing the removal of the acidic gas. The tubular micro-bubble generator realizes the enhanced stripping of air in the form of micro-bubbles by contacting with acid produced water, and can perform the stripping of Fe in water when the air is used as an air source 2+ 、S 2- And the like, and harmful components are subjected to oxidation reaction, so that the substances are effectively separated from the produced water.
4. The movable part can reciprocate under the cooperation of carousel and fly leaf to drive movable filter spare through first body of rod or second body of rod and do reciprocating motion, avoid large granule composition such as silt to deposit in a large number and form the jam on the active filter spare, likewise, also can cooperate the dredge pump work through the movable part, avoid ingredient such as silt to block up the dredge pipe.
Drawings
FIG. 1 is a schematic diagram of the structure of the device;
FIG. 2 is a cross-sectional view of the movable portion;
fig. 3 is a cross-sectional view of the baffle.
Wherein, 1, an adjusting pool; 2. a decoloring reaction tank; 3. a gel breaking reaction tank; 4. a flocculation sedimentation tank; 5. a first agitator; 6. a second stirrer; 7. a third agitator; 8. a water pump; 9. stirring the leaves; 10. a hollow section; 11. a cutting member; 12. a drug administration port; 13. a flow guide; 14. a movable filter; 15. a mud discharging device; 16. a movable part; 17. fixing the filter element; 18. a water outlet; 19. a housing; 20. a turntable; 21. a movable plate; 22. a column; 23. an arc-shaped groove; 24. a first rod body; 25. a second rod body; 26. a flow guiding pipe; 27. an air inlet pipe; 28. a first deflector sheet; 29. a second deflector sheet; 30. and a second deflector sheet.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Examples
As shown in fig. 1, the oilfield produced water treatment system comprises a regulating tank 1, a decoloring reaction tank 2, a gel breaking reaction tank 3 and a flocculation sedimentation tank 4 which are sequentially communicated, wherein the regulating tank 1, the decoloring reaction tank 2, the gel breaking reaction tank 3 and the flocculation sedimentation tank 4 are communicated with each other through a water pump 8, and the regulating tank 1, the decoloring reaction tank 2, the gel breaking reaction tank 3 and the flocculation sedimentation tank 4 are made of explosion-proof materials.
In this embodiment, stirring structures are respectively disposed in the regulating tank 1, the decolorizing reaction tank 2 and the gel breaking reaction tank 3, and are a first stirrer 5, a second stirrer 6 and a third stirrer 7 in sequence, the second stirrer 6 and the third stirrer 7 are structures that conventional electrodes drive stirring shafts to rotate, the first stirrer 5 is also driven by a motor to rotate, but stirring blades 9 on the stirring shafts are composed of a straight section and an inclined hollow section 10, and cutting members 11 are disposed in the hollow section 10, and preferably the cutting members 11 are blades.
As shown in figure 1, the system needs to be matched with chemical agents for treatment in the using process, so that the decoloring reaction tank 2 and the gel breaking reaction tank 3 are provided with drug feeding ports, and the gel breaking reaction tank 3 is provided with drug feeding ports for respectively adding gel breaker and flocculant.
As shown in fig. 1 and 3, a flow guiding member 13 is arranged at the water inlet of the gel breaking reaction tank 3, the flow guiding member 13 is a flow guiding tube 26 communicated with the water inlet, and the tube body of the flow guiding tube 26 is of a hollow structure. An air inlet pipe 27 communicated with the pipe body is fixed on the flow guide pipe 26, and the air inlet pipe 27 extends out of the gel breaking sedimentation tank 3 and can be used for air inlet from the outside.
Meanwhile, a plurality of guide vanes with gaps are arranged on the inner delay circumference of the guide pipe 26, and in this embodiment, a first guide vane 28, a second guide vane 29 and a third guide vane 30 are arranged, wherein the first guide vane 28 is located right below the air inlet pipe 27.
The above-mentioned guiding blades are also communicated with the hollow pipe body of the guiding pipe 26, that is, the gas introduced from the air inlet pipe 27 can be split into the first guiding blade 28, the second guiding blade 29 and the third guiding blade 30 through the pipe body of the guiding pipe 26, and then the gas is uniformly mixed with the water body in the guiding pipe 26 through the air outlets at the tail ends of the first guiding blade 28, the second guiding blade 29 and the third guiding blade 30.
As shown in fig. 1 and 2, a movable filter 14 and a fixed filter 17 are disposed in the flocculation sedimentation tank 4, and a gap is formed between the movable filter 14 and the fixed filter 17, so that the flocculation sedimentation tank 4 is divided into a plurality of different cavities, preferably, the movable filter 14 is a filter screen capable of filtering large particles and other sediments, and the fixed filter is composed of a multi-medium filter and a quartz filter which are conventional in the art, and will not be described herein.
The movable filter element 14 is arranged on one side close to the gel breaking sedimentation tank 3, is arc-shaped, one end of the movable filter element is hinged with the inner top of the flocculation sedimentation tank 4, and the other end of the movable filter element can freely slide in a chute formed in the inner bottom of the flocculation sedimentation tank 4 and can reciprocate in the chute under the drive of the movable part 16.
In this embodiment, the movable portion 16 is configured as shown in fig. 2, and includes a housing 19, a turntable 20 and a motor for driving the turntable 20 to rotate are disposed in the housing 19, and a movable plate 21 that cooperates with the turntable 20 to perform a reciprocating motion.
The method comprises the following steps: the column 22 is arranged at the non-center of the turntable 20, the position of the column 22 can be adjusted according to the reciprocating distance, the column is preferably arranged at the circumferential edge of the turntable 20, and meanwhile, an arc-shaped groove 23 which is used for embedding the column 22 and can freely slide is formed on the movable plate 21. Therefore, the turntable 20 is driven by the motor to rotate, and then the movable plate 21 can complete reciprocating motion through the cooperation of the column 22 and the arc-shaped groove 23.
Meanwhile, a first rod body 24 and a second rod body 25 extending to the outside of the shell 19 are arranged on two sides of the movable plate 21, and the first rod body 24 or the second rod body 25 can be connected with the bottom of the movable filter element 14 to drive the movable filter element 14 to move in the chute, so that the movable filter element 14 can reciprocate in the chute. The movable part 16 may be disposed in the flocculation sedimentation tank 4 or outside the flocculation sedimentation tank 4, so long as the movable filter 14 can complete the reciprocating motion under the driving of the first rod 24 or the second rod 25.
As shown in fig. 1, a sludge discharge device 15 is further arranged at the bottom of the flocculation sedimentation tank 4, a water outlet 18 is arranged at the bottom of the other side, the sludge discharge device specifically comprises a sludge discharge pipe and a sludge discharge pump which are connected with the flocculation sedimentation tank 4, and large-particle impurities such as sludge in the flocculation sedimentation tank 4 are discharged through the sludge discharge pump.
Similarly, the end of the first rod 24 or the second rod 25 may be connected with or disconnected from the other structure capable of pushing impurities such as sludge, so that the sludge can be pushed into the sludge discharge pipe when the sludge discharge device 15 discharges the sludge, thereby effectively preventing the problem of blockage.

Claims (4)

1. The oilfield produced water treatment system is characterized by comprising an adjusting tank, a decoloring reaction tank, a gel breaking reaction tank and a flocculation sedimentation tank which are sequentially communicated;
the regulating tank is provided with a first stirrer, the decoloring reaction tank is internally provided with a second stirrer, and the gel breaking reaction tank is internally provided with a third stirrer;
the decoloring reaction tank and the gel breaking reaction tank are provided with drug feeding ports; the bottom of the flocculation precipitation tank is provided with a mud discharging device;
a water inlet of the gel breaking reaction tank is provided with a flow guide piece; the flow guiding piece comprises a flow guiding pipe communicated with the water inlet; the guide pipe is provided with an air inlet pipe extending out of the gel breaking reaction tank, and a plurality of guide blades with gaps are arranged in the guide pipe along the circumference of the guide pipe;
the guide blades comprise a first guide blade, a second guide blade and a third guide blade; the first flow guiding sheet is positioned below the air inlet pipe and is used for guiding air;
a movable filter piece and a movable part for driving the movable filter piece to reciprocate are arranged in the flocculation sedimentation tank; one end of the movable filtering piece is hinged with the inner top of the flocculation sedimentation tank, and the other end of the movable filtering piece can freely slide in a chute arranged at the bottom of the flocculation sedimentation tank;
the movable part comprises a shell; a rotary table capable of rotating under the drive of a motor and a movable plate matched with the rotary table are arranged in the shell; a column is fixedly arranged at the non-center of the turntable; the movable plate is provided with an arc-shaped groove in which the column body is embedded and can freely slide;
the two sides of the movable plate are respectively provided with a first rod body and a second rod body; the first rod body or the second rod body drives the movable filter piece to slide in the gel breaking reaction tank; the flocculation precipitation Chi Waide part is provided with a sludge discharge device, and the sludge discharge device comprises a sludge discharge pump and a sludge discharge pipe; the first rod body or the second rod body can stir the sludge at the bottom in the flocculation sedimentation tank and push the sludge to the sludge discharge pipe.
2. The oilfield produced water treatment system of claim 1, wherein the first agitator is provided with a plurality of agitating blades; the stirring blade comprises a straight section and a hollow section obliquely arranged on the straight section; a cutting member is arranged in the hollow section.
3. The oilfield produced water treatment system of claim 1, wherein the gel breaking reaction tank is provided with dosing ports for adding a gel breaker and a flocculant, respectively.
4. The oilfield produced water treatment system of claim 1, wherein a fixed filter is further disposed within the flocculation precipitation tank; the flocculation sedimentation tank is divided into different cavities by the movable filtering piece and the fixed filtering piece.
CN202211020949.9A 2022-08-24 2022-08-24 Oilfield produced water treatment system Active CN115403181B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211020949.9A CN115403181B (en) 2022-08-24 2022-08-24 Oilfield produced water treatment system

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Application Number Priority Date Filing Date Title
CN202211020949.9A CN115403181B (en) 2022-08-24 2022-08-24 Oilfield produced water treatment system

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CN115403181A CN115403181A (en) 2022-11-29
CN115403181B true CN115403181B (en) 2024-01-30

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773659A (en) * 1970-12-16 1973-11-20 Babson Bros Co System for processing wastes
CN204058037U (en) * 2014-08-14 2014-12-31 诸暨洁球环保科技有限公司 A kind of flocculation basin being convenient to clear up
CN104743723A (en) * 2015-04-14 2015-07-01 梅立维 Photocatalytic treatment process for fracturing flow-back fluid
CN204973860U (en) * 2015-06-17 2016-01-20 扬中市金元化工电力设备厂 High efficiency reation kettle
CN106745867A (en) * 2017-01-19 2017-05-31 浙江为环科技有限公司 A kind of aerator
CN207426038U (en) * 2017-11-21 2018-05-29 大连理工高邮研究院有限公司 A kind of portable storage battery group
CN109205962A (en) * 2018-11-14 2019-01-15 谢响玲 A kind of multilayer immobilized microorganism sewage treatment process
CN111792763A (en) * 2020-08-19 2020-10-20 国投信开水环境投资有限公司 High turbid water treatment device and sewage treatment system
CN213506130U (en) * 2020-08-19 2021-06-22 江苏彬鹏环保有限公司 Flocculation guiding device
CN217025574U (en) * 2021-12-23 2022-07-22 沈杰 High-concentration organic wastewater pretreatment device
CN114920385A (en) * 2022-04-25 2022-08-19 成都苏坤环保科技有限公司 Oilfield produced water treatment process

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773659A (en) * 1970-12-16 1973-11-20 Babson Bros Co System for processing wastes
CN204058037U (en) * 2014-08-14 2014-12-31 诸暨洁球环保科技有限公司 A kind of flocculation basin being convenient to clear up
CN104743723A (en) * 2015-04-14 2015-07-01 梅立维 Photocatalytic treatment process for fracturing flow-back fluid
CN204973860U (en) * 2015-06-17 2016-01-20 扬中市金元化工电力设备厂 High efficiency reation kettle
CN106745867A (en) * 2017-01-19 2017-05-31 浙江为环科技有限公司 A kind of aerator
CN207426038U (en) * 2017-11-21 2018-05-29 大连理工高邮研究院有限公司 A kind of portable storage battery group
CN109205962A (en) * 2018-11-14 2019-01-15 谢响玲 A kind of multilayer immobilized microorganism sewage treatment process
CN111792763A (en) * 2020-08-19 2020-10-20 国投信开水环境投资有限公司 High turbid water treatment device and sewage treatment system
CN213506130U (en) * 2020-08-19 2021-06-22 江苏彬鹏环保有限公司 Flocculation guiding device
CN217025574U (en) * 2021-12-23 2022-07-22 沈杰 High-concentration organic wastewater pretreatment device
CN114920385A (en) * 2022-04-25 2022-08-19 成都苏坤环保科技有限公司 Oilfield produced water treatment process

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