CN109455831B - Produced water treatment system and process - Google Patents

Produced water treatment system and process Download PDF

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Publication number
CN109455831B
CN109455831B CN201710794243.0A CN201710794243A CN109455831B CN 109455831 B CN109455831 B CN 109455831B CN 201710794243 A CN201710794243 A CN 201710794243A CN 109455831 B CN109455831 B CN 109455831B
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China
Prior art keywords
oil
water
tank
liquid passing
outlet
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CN201710794243.0A
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CN109455831A (en
Inventor
谢卫红
李冰
徐英俊
惠熙祥
汤林
张维智
王忠祥
朱景义
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Petrochina Co Ltd
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Petrochina Co Ltd
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Classifications

    • 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
    • C02F1/40Devices for separating or removing fatty or oily substances or similar floating material
    • 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
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • 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
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/10Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/04Flow arrangements
    • C02F2301/046Recirculation with an external loop
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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

Abstract

The invention discloses a produced water treatment system and a process, and belongs to the field of produced water treatment of oil and gas fields. The system comprises: the device comprises a water storage tank, an oil removing device, a lifting pump, a filtering unit, a backwashing water pump and a recovery water tank. Wherein, deoiling device, elevator pump and filter unit are connected in order through the entry end of first liquid pipeline with the water storage tank. The outlet end of the water storage tank is communicated with the filtering unit through a second liquid passing pipeline; the back washing water pump is arranged on the second liquid passing pipeline; the first entry end of recovery pond is passed through the third liquid pipeline and is communicate with the filter unit respectively, and the exit end passes through the entry end intercommunication of fourth liquid pipeline and deoiling device. The oil removal device is arranged, so that the treatment of the crude oil in the produced water is realized, a plurality of structures are not required to be matched for operation, the occupied area is small, and the cost is low; the operation flow is short, and the operation efficiency is high. Through setting up the filter unit, further got rid of crude oil and suspended solid in the aquatic of producing, prevented stratum pollution.

Description

Produced water treatment system and process
Technical Field
The invention relates to the field of produced water treatment of oil and gas fields, in particular to a produced water treatment system and a process.
Background
In the oil and gas field exploitation operation process, along with the continuous increase of operating time, the moisture content of the crude oil of producing constantly risees, and the oil and gas field produces a large amount of produced water, and this produced water generally includes: water, crude oil and suspended matter. These produced waters can cause formation contamination if directly reinjected into the field. Therefore, in order for produced water to meet the reinjection requirements of oil and gas fields, it is necessary to treat the produced water.
The prior art uses multiple structures in conjunction to treat produced water. Specifically, a natural settling tank, a coagulation settling tank, a buffer tank and a water storage tank are sequentially connected through pipelines, produced water is discharged into the natural settling tank, oil-water separation is carried out in the natural settling tank, and partial suspended matters of the produced water are precipitated. And then, the produced water after oil-water separation is discharged into a coagulation and sedimentation tank, and a coagulant and a flocculant are added into the coagulation and sedimentation tank, so that the suspended matter particles become large, the sinking speed of the suspended matter is improved, and the oil-water separation effect is enhanced. In the process, suspended matters are settled to the bottom of the tank in a natural settling tank and a coagulation settling tank; the crude oil is discharged from an oil outlet pipe communicated with the tank walls of the natural settling tank and the coagulation settling tank. And then, draining the produced water after oil removal into a buffer tank, and draining the produced water into a water storage tank through a filter to finish the treatment of the produced water, wherein at the moment, the produced water in the water storage tank can be used for subsequent water injection operation.
The inventor finds that the prior art has at least the following problems:
in the prior art, when crude oil in produced water is removed, a plurality of structures are required to be used for cooperation operation, so that the occupied area is large, and the cost is high; the operation flow is longer and the operation efficiency is low. Moreover, if crude oil and suspended solids still exist after the produced water is discharged from the buffer tank, the produced water can pollute the stratum after the produced water is used for water injection operation of the oil and gas field.
Disclosure of Invention
In order to solve the technical problems, the embodiment of the invention provides a produced water treatment system and a process. The specific technical scheme is as follows:
in a first aspect, embodiments of the present disclosure provide a produced water treatment system, including: a water storage tank;
the system further comprises: the device comprises an oil removing device, a lifting pump, a filtering unit, a backwashing water pump and a recovery water tank;
the oil removing device, the lifting pump and the filtering unit are sequentially connected with the inlet end of the water storage tank through a first liquid passing pipeline;
the outlet end of the water storage tank is communicated with the filtering unit through a second liquid passing pipeline;
the back washing water pump is arranged on the second liquid passing pipeline;
the first inlet end of the recovery water tank is communicated with the filtering unit through a third liquid passing pipeline, and the outlet end of the recovery water tank is communicated with the inlet end of the oil removing device through a fourth liquid passing pipeline.
Specifically, preferably, the filter unit includes: and the first filter and the second filter are sequentially arranged on the first liquid passing pipeline along the liquid passing direction.
Specifically, preferably, the system further includes: and the outlet end of the air compressor is respectively communicated with the first liquid passing line between the first filter and the second filter and the first liquid passing line between the second filter and the water storage tank.
Specifically, preferably, the oil removing device includes: the device comprises a tank-shaped body, wherein a first oil removing area, a second oil removing area and a reaction area which are independent from each other are arranged in the tank-shaped body;
the inlet end of the water inlet pipe is positioned outside the tank-shaped body, and the outlet end of the water inlet pipe penetrates through the second oil removing area and then is arranged in the first oil removing area;
the outlet end of the first oil outlet pipe is positioned outside the tank-shaped body, and the inlet end of the first oil outlet pipe penetrates through the side wall of the tank-shaped body and then is arranged in the first oil removing area above the outlet end of the water inlet pipe;
the outlet end of the second oil outlet pipe is positioned outside the tank-shaped body, and the inlet end of the second oil outlet pipe penetrates through the side wall of the tank-shaped body and then is arranged at the upper part of the second oil removing area;
the inlet end of the water outlet pipe is communicated with the lower part of the second oil removing area, and the outlet end of the water outlet pipe is arranged outside the tank-shaped body;
the inlet end of the fifth liquid passing pipeline is positioned in the first oil removing area below the outlet end of the water inlet pipe, the outlet end of the fifth liquid passing pipeline is positioned in the reaction area, and the fifth liquid passing pipeline is sequentially provided with two injection ports and a pipeline mixer along the liquid passing direction;
and the inlet end of the sixth liquid passing pipeline is communicated with the reaction area, the outlet end of the sixth liquid passing pipeline is communicated with the second oil removing area, and the outlet end of the sixth liquid passing pipeline is positioned below the inlet end of the second oil outlet pipe.
Specifically, preferably, the oil removing device includes: a plurality of perforated sludge discharge pipes connected in sequence;
and the perforated sludge discharge pipes penetrate through the first oil removal area, the second oil removal area and the lower part of the reaction area.
Specifically, preferably, the system further includes: the sump oil tank and the first water pump are communicated with the first oil outlet pipe and the second oil outlet pipe in sequence through a seventh liquid passing pipeline.
Specifically, preferably, the system further includes: and the second water pump is arranged at the inlet end of the fourth liquid passing pipeline.
Specifically, preferably, the system further includes: the sludge pond, the third water pump, the centrifugal dehydrator and the sludge truck are communicated with the outlet end of the perforated sludge discharge pipe in sequence through an eighth liquid passing pipeline.
Specifically, preferably, the system further includes: and the inlet end of the ninth liquid passing pipeline is communicated with the sludge tank and the centrifugal dehydrator respectively, and the outlet end of the ninth liquid passing pipeline is communicated with the second inlet end of the recovery water tank.
In a second aspect, the embodiments of the present invention provide a process for produced water treatment using the above system, the process comprising:
the produced water is discharged into an oil removal device, and the oil removal device is used for carrying out oil removal treatment on the produced water;
the produced water after oil removal treatment is discharged to a filtering unit through a first liquid passing pipeline by using a lifting pump, and the produced water is filtered;
discharging the filtered produced water into a water storage tank;
reversely discharging part of the produced water in the water storage tank to the filtering unit through a second liquid passing pipeline by using a reverse flushing water pump, and backwashing the filtering unit;
and discharging impurities obtained by backwashing the filtering unit into a recovery water tank through a third liquid passing pipeline, and in the process, continuously discharging the produced water in the recovery water tank into the oil removing device through a fourth liquid passing pipeline.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the produced water treatment system provided by the embodiment of the invention, the oil removal device is arranged, so that the treatment of crude oil in the produced water is realized, a plurality of structures are not required to be matched for operation, the occupied area is small, and the cost is low; the operation flow is short, and the operation efficiency is high. Through setting up the elevator pump, guaranteed that the produced water after deoiling device handles can arrange to the filter unit smoothly. Through setting up the filter unit to filter the produced water, even still there are crude oil and suspended solid in the produced water of deoiling device of flowing through, also can filter it through this filter unit, prevent stratum pollution. Through setting up the back flush water pump, realized the back flush to the filter unit, guaranteed going on smoothly of follow-up extraction water treatment. Through setting up the recovery pond, realized the recovery to impurity after the backwash to will have impurity's produced water and discharge into deoiling device once more, formed a circulation system, guaranteed the effective utilization to the produced water resource.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a produced water treatment system provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an oil removing apparatus according to an embodiment of the present invention.
The reference numerals denote:
1 a water storage tank, wherein the water storage tank,
2 a device for removing the oil, wherein,
3, lifting the pump, and then lifting the pump,
4, filtering the mixture by a filter unit,
401 a first filter to be used in the first filter,
402 a second filter to be used in the second filter,
5 a first liquid-passing line, wherein the first liquid-passing line,
6 back flushing the water pump, and then washing the water pump,
7 a water recovery pool is arranged in the water tank,
8 a second liquid-passing line is arranged on the first liquid-passing line,
9 a third liquid passing line, wherein the third liquid passing line is connected with a liquid outlet of the liquid tank,
10 a fourth liquid-passing line which is provided with a liquid-passing hole,
11 an air compressor, which is used for compressing air,
12 a body in the shape of a tank,
13 a first oil-removing region, wherein,
14 a second oil-removing region is arranged in the oil-removing region,
15 of the reaction zone, and a reaction zone,
16 of a water inlet pipe and a water outlet pipe,
17 a first oil outlet pipe is arranged on the first oil outlet pipe,
18 a second oil outlet pipe, wherein the second oil outlet pipe,
19 a water outlet pipe is arranged on the water inlet pipe,
20 a fifth liquid passing line for passing the liquid,
21 a pipeline mixer, and a pipeline mixer,
22 a sixth liquid-carrying line,
23 a mud pipe is perforated by a hole,
24 of the waste oil tank is arranged in the oil tank,
25 a first water pump, which is connected with the water pump,
26 a seventh liquid-carrying line,
27 a second water pump for the second water pump,
28 of a sludge pool, wherein the sludge pool is,
29 a third water pump, which is connected with the water pump,
30, a centrifugal dehydrator is adopted,
31 the sludge is carried by the sludge vehicle,
32 an eighth liquid-carrying line,
33 a ninth liquid-carrying line,
34 is arranged outside the outer side of the cap body,
35 a first cylinder to be used for the first cylinder,
36 a first one of the annular baffles is,
37 is provided with a cap body inside, and the cap body,
38 of a vortex reactor, and a circulating pump,
a first water distribution system (39) is provided,
3901 a first water-dispensing channel,
3902 a first water distribution main pipe,
3903 a first water distribution manifold comprising a plurality of water distribution pipes,
3904 a first horn mouth is formed on the base,
a second water distribution system 40 is provided,
4001 a second water distribution tank,
4002 a second water distribution main pipe,
4003 a second water distribution branch pipe,
4004 a second bell-mouth, and a second bell-mouth,
41 of a water-collecting system, and a water-collecting system,
4101 a water collecting tank is arranged on the upper part of the water collecting tank,
4102 a water collecting main pipe for collecting water,
4103 a water collecting branch pipe for collecting water,
4104 a third bell-mouth of the second type,
a vent tube 42 is provided in the housing,
43 an exhaust duct, which is provided with a gas inlet,
44 a floating oil-receiving device for receiving oil,
45 of the first gate valve, and a second gate valve,
46 of the second gate valve, and a second gate valve,
47 of the length of the partition element,
4701 the second cylinder body is provided with a second cylinder body,
4702 a second annular baffle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
It should be noted that the produced water is located in the crude oil dehydration station, and before the produced water is treated, the water inlet of the oil removing device 2 is connected with the water inlet pipeline of the crude oil dehydration station.
In a first aspect, embodiments of the present invention provide a produced water treatment system, as shown in fig. 1 and 2, the system comprising: the device comprises a water storage tank 1, an oil removing device 2, a lifting pump 3, a filtering unit 4, a backwashing water pump 6 and a recovery water tank 7. Wherein, deoiling device 2, elevator pump 3 and filter unit 4 are connected in order with the entry end of water storage tank 1 through first liquid pipeline 5. The outlet end of the water storage tank 1 is communicated with the filtering unit 4 through a second liquid passing pipeline 8; the back washing water pump 6 is arranged on the second liquid passing pipeline 8; the first inlet end of the recovery water tank 7 is respectively communicated with the filtering unit 4 through a third liquid passing pipeline 9, and the outlet end is communicated with the inlet end of the oil removing device 2 through a fourth liquid passing pipeline 10.
When the produced water is treated, the produced water is discharged into the oil removal device 2, flows into the first liquid passing pipeline 5 after being subjected to oil removal treatment in the oil removal device 2, and is discharged into the filtering unit 4 under the action of the lifting pump 3, so that suspended matters in the produced water are filtered. And then, discharging the filtered produced water into the water storage tank 1 to finish the treatment of the produced water. At this time, the produced water in the water storage tank 1 is used for subsequent water injection operation.
In the above operation process, after the produced water flows through the filtering unit 4 and enters the water storage tank 1, the backwashing water pump 6 is started to reversely discharge part of the produced water filtered in the water storage tank 1 to the filtering unit 4 through the second liquid passing line 8, and the impurities remaining in the filtering unit 4 are discharged into the recovery water tank 7 through the third liquid passing line 9. In the process, the produced water in the recovery water tank 7 is continuously discharged into the oil removing device 2 through the fourth liquid passing line 10.
According to the produced water treatment system provided by the embodiment of the invention, the oil removal device 2 is arranged, so that the treatment of crude oil in the produced water is realized, a plurality of structures are not required to be matched for operation, the occupied area is small, and the cost is low; the operation flow is short, and the operation efficiency is high. By arranging the lift pump 3, the produced water treated by the oil removing device 2 can be smoothly discharged to the filtering unit 4. Through setting up filter unit 4 to filter the produced water, even still have crude oil and suspended solid in the produced water of deoiling device 2 of flowing through, also can filter it through this filter unit 4, prevent stratum pollution. By arranging the backwashing water pump 6, backwashing on the filtering unit 4 is realized, and smooth proceeding of subsequent produced water treatment operation is ensured. Through setting up recovery pond 7, realized the recovery to impurity after the backwash to will have impurity's produced water and discharge into deoiling device 2 once more, formed a circulation system, guaranteed the effective utilization to the produced water resource.
It should be noted that, when the backwashing water pump 6 is used for backwashing, only a small amount of water (about 10% -20% of the water inlet amount of the water storage tank 1) in the water storage tank 1 needs to be used, and most of the water in the water storage tank 1 is directly discharged into the water injection system for water injection. And, the outlet end of the water storage tank 1 here is not identical to the outlet end of the water injection system.
In order to further improve the filtering effect on the produced water after passing through the oil removing device 2. As shown in fig. 1, the filter unit 4 includes: a first filter 401 and a second filter 402 sequentially disposed on the first liquid passing line 5 in the liquid passing direction.
Wherein, the liquid passing direction refers to that: the direction of flow of the produced water in the first flow line 5. The first filter 401 and the second filter 402 are connected with the outlet end of the water storage tank 1 through a second liquid passing line 8, and are connected with the first inlet end of the recovery water tank 7 through a third liquid passing line 9.
In an embodiment of the present invention, as shown in fig. 1, the produced water treatment system further includes: an air compressor 11 having an outlet end communicating with the first filtrate line 5 between the first filter 401 and the second filter 402, and the first filtrate line 5 between the second filter 402 and the water storage tank 1, respectively.
In the process of treating the produced water, after the produced water enters the water storage tank 1 through the first filter 401 and the second filter 402, the air compressor 11 is started to perform air washing on the first filter 401 and the second filter 402, impurities in the first filter 401 and the second filter 402 are blown into the third liquid passing line 9, and are discharged into the recovery water tank 7 through the third liquid passing line 9.
Through setting up air compressor 11, provide air supply power for the backwash operation to through cooperating with backwash water pump 6, carry out liquid washing and gas washing simultaneously to first filter 401 and second filter 402, further improved the backwash effect to first filter 401 and second filter 402.
In the backwashing operation, the backwashing operation may be performed on the first filter 401 alone, the backwashing operation may be performed on the second filter 402 alone, or the backwashing operation may be performed on both the first filter 401 and the second filter 402.
In the embodiment of the present invention, as shown in fig. 2, the oil removing device 2 includes: the device comprises a tank-shaped body 12, a water inlet pipe 16, a first oil outlet pipe 17, a second oil outlet pipe 18, a water outlet pipe 19, a fifth liquid passing pipeline 20, a pipeline mixer 21 and a sixth liquid passing pipeline 22. Wherein, a first deoiling area 13, a second deoiling area 14 and a reaction area 15 which are independent from each other are arranged in the tank-shaped body 12. The inlet end of the inlet pipe 16 is located outside the tank-shaped body 12, and the outlet end of the inlet pipe passes through the second oil removing area 14 and then is arranged in the first oil removing area 13. The outlet end of the first oil outlet pipe 17 is positioned outside the tank-shaped body 12, and the inlet end of the first oil outlet pipe passes through the side wall of the tank-shaped body 12 and then is arranged in the first oil removing area 13 above the outlet end of the water inlet pipe 16. The outlet end of the second oil outlet pipe 18 is positioned outside the tank-shaped body 12, and the inlet end of the second oil outlet pipe is arranged at the upper part of the second oil removing area 14 after penetrating through the side wall of the tank-shaped body 12. The inlet end of the water outlet pipe 19 is communicated with the lower part of the second oil removing area 14, and the outlet end is arranged outside the tank-shaped body 12. The inlet end of the fifth liquid passing pipeline 20 is positioned in the first oil removing area 13 below the outlet end of the water inlet pipe 16, the outlet end of the fifth liquid passing pipeline 20 is positioned in the reaction area 15, and two injection ports and a pipeline mixer 21 are sequentially arranged on the fifth liquid passing pipeline 20 along the liquid passing direction. The inlet end of the sixth liquid passing line 22 is communicated with the reaction zone 15, the outlet end is communicated with the second oil removing zone 14, and the outlet end of the sixth liquid passing line 22 is positioned below the inlet end of the second oil outlet pipe 18.
The working principle of the oil removing device 2 is as follows:
the produced water is discharged into the tank-shaped body 12 from the inlet end of the water inlet pipe 16, is discharged to the first oil removing area 13 from the outlet end of the water inlet pipe 16, and naturally settles in the first oil removing area 13, namely, part of suspended matters in the produced water sink to the bottom of the first oil removing area 13 due to self gravity, and the produced water is subjected to primary oil-water separation. At this time, the crude oil in the produced water is above the water, and since the inlet end of the first oil outlet pipe 17 is located above the outlet end of the water inlet pipe 16, when the liquid level of the crude oil in the tank-shaped body 12 reaches the inlet end position of the first oil outlet pipe 17, part of the crude oil in the produced water enters the first oil outlet pipe 17 and is discharged out of the tank-shaped body 12 from the outlet end of the first oil outlet pipe 17.
Since the inlet end of the fifth overflow line 20 is located in the first oil removal zone 13 below the outlet end of the water inlet pipe 16, the produced water continuously enters the fifth overflow line 20 and enters the reaction zone 15 after flowing through the line mixer 21 during the process of continuously injecting the produced water into the tank-shaped body 12 through the water inlet pipe 16. In the process, a coagulant and a flocculant are respectively added into the two injection ports, so that the produced water is mixed with the coagulant and the flocculant and then enters the reaction zone 15, and the reaction is carried out in the reaction zone 15, so that suspended particles in the produced water are enlarged.
The produced water enters the sixth liquid flowing line 22 after reacting in the reaction zone 15 and flows into the second oil removing zone 14 from the sixth liquid flowing line 22. At this time, suspended matters in the produced water sink to the bottom of the second deoiling area 14, and the produced water undergoes a second oil-water separation. Because the outlet end of the sixth liquid passing line 22 is located below the inlet end of the second oil outlet pipe 18 and the crude oil in the produced water is located above the water, when the crude oil needs to be discharged, the crude oil can be automatically discharged out of the tank-shaped body 12 from the outlet end of the second oil outlet pipe 18 only by opening the valve for controlling the second oil outlet pipe 18, and the water is discharged out of the tank-shaped body 12 from the water outlet pipe 19.
Through setting up jar form body 12 to set up first deoiling district 13, second deoiling district 14, reaction zone 15 that are independent each other in jar form body 12, and first oil outlet pipe 17 and second oil outlet pipe 18, and through the fifth pipeline 20 that crosses first deoiling district 13 and reaction zone 15 intercommunication, through the sixth pipeline 22 with second deoiling district 14 and reaction zone 15 intercommunication, through first oil outlet pipe 17 and second oil outlet pipe 18 with jar form body 12 in the crude oil discharge in the water, realized the oil extraction operation twice of produced water. Through setting up inlet tube 16 to with the entry end setting of first oil pipe 17 in the top of inlet tube 16 exit end, both guaranteed the normal emission of crude oil in the production water, make again and have the interval between the entry end of first oil pipe 17 and the exit end of inlet tube 16, provide the buffer space for the production water, ensure that hydraulic pressure is stable. Through set up two sprue and line mixer 21 in order on fifth pipeline 20 that crosses, be convenient for pour into coagulant and flocculating agent into in the operation in-process in fifth pipeline 20 that crosses for the suspended solid sinks speed and water oil separating speed, improves the operating efficiency. Based on the above, the oil removing device 2 not only occupies small area, but also has low cost. And the operation flow is short, and the operation efficiency is higher.
In the embodiment of the present invention, as shown in fig. 2, the oil removing device 2 further includes: outer cap 34, first barrel 35, first annular baffle 36. Wherein, the outer cap body 34 is opened downwards, and the lower end is vertically connected with the bottom wall of the tank-shaped body 12. The first cylinder 35 is sleeved outside the outer cap body 34, and the lower end of the first cylinder is connected with the bottom wall of the tank-shaped body 12. The inner and outer rings of the first annular baffle 36 are connected to the upper end of the first cylinder 35 and the inner wall of the can body 12, respectively. A cavity surrounded by the tank-shaped body 12, the outer cap body 34, the first cylinder body 35 and the first annular baffle 36 forms a first oil removing area 13; a cavity surrounded by the first cylinder 35, the first annular baffle 36 and the tank-shaped body 12 forms a second oil removing area 14; the inner cavity of the outer cap 34 constitutes the reaction zone 15.
By arranging the outer cap body 34, the first barrel 35 and the first annular baffle 36, the lower end of the outer cap body 34 is vertically connected with the bottom wall of the can-shaped body 12; the first cylinder 35 is sleeved outside the outer cap body 34, and the lower end of the first cylinder is connected with the bottom wall of the tank-shaped body 12, so that the first oil removing area 13, the second oil removing area 14 and the reaction area 15 which are independent of each other can be formed in the tank-shaped body 12, and subsequent two oil removing operations can be performed conveniently.
Wherein, the first cylinder 35 is communicated with the outer cap 34 through the sixth liquid passing line 22. The outlet end of the first liquid passing pipeline 20 sequentially passes through the second oil removing area 14 and the first oil removing area 13 and then is arranged in the outer cap body 34, part of the first liquid passing pipeline 20 is exposed out of the tank-shaped body 12, and the two injection ports and the pipeline mixer 21 are sequentially arranged on the first liquid passing pipeline 20 exposed out of the tank-shaped body 12, so that a worker can respectively add a coagulant and a flocculant into the two injection ports.
The first annular baffle 36 is inclined downwardly after installation (i.e. the outer ring of the first annular baffle 36 is located at a higher level than the inner ring of the first annular baffle 36) so that the suspension can slide down quickly to the bottom of the tank body 12 through the first annular baffle 36.
In order to discharge suspended matters sinking into the bottom of the tank-shaped body 12, the tank-shaped body 12 is prevented from being blocked, thereby influencing subsequent construction operation. As shown in fig. 2, the oil removing device 2 further includes: a plurality of perforated sludge discharge pipes 23 connected in series. The plurality of perforated sludge pipes 23 penetrate the first deoiling zone 13, the second deoiling zone 14 and the lower portion of the reaction zone 15.
During operation, suspended matters sinking to the bottoms of the first oil removing area 13, the second oil removing area 14 and the reaction area 15 enter the perforated sludge discharge pipe 23 from holes in the perforated sludge discharge pipe 23 and are discharged from the end part of the perforated sludge discharge pipe 23.
Wherein, a plurality of perforated sludge discharge pipes 23 connected in sequence can be separately arranged at the lower part of the second oil removing area 14 or the first oil removing area 13 and the second oil removing area 14 so as to discharge suspended matters in the first oil removing area 2 or the second oil removing area 3.
In order to increase the discharge speed of suspended substances, a plurality of perforated sludge discharge pipes 23 and a plurality of imperforate sludge discharge pipes can be sequentially connected in a staggered manner.
In the embodiment of the present invention, an inner cap body 37 (see fig. 2) is sleeved at the middle part of the outer cap body 34, the lower end of the inner cap body 37 is communicated with the outlet end of the first liquid passing line 20, a closed annular space is formed by the inner cap body 37 and the middle part of the outer cap body 34 in a matching manner, and the side wall of the upper part of the inner cap body 37 and the bottom wall of the closed annular space are both in a screen mesh structure; the upper part of the first cylinder 35 is communicated with the outer cap 34 below the closed annular space through the sixth liquid passing line 22. This deoiling device 2 still includes: a plurality of vortex reactors 38 (see fig. 2) are provided in the inner cap body 37 and the closed annular space.
In operation, after the produced water after the first oil-water separation is discharged from the outlet end of the first liquid passing line 20, the produced water sequentially passes through the plurality of vortex reactors 38 in the inner cap body 37 and the plurality of vortex reactors 38 in the annular space between the inner cap body 37 and the outer cap body 34, and then is discharged from the sixth liquid passing line 22, and enters the second oil removing area 14.
By arranging the inner cap body 37 and arranging the plurality of vortex reactors 38 in the annular space between the inner cap body 37, the inner cap body 37 and the outer cap body 34, produced water can be fully collided when flowing through the plurality of vortex reactors 38, suspended matters in the produced water lose stability, and are condensed with each other, the volume of the produced water is increased, and finally the produced water is discharged to the second oil removing area 14 through the second liquid passing pipeline 22, so that the use effect of the flocculating agent is further improved. By arranging the side wall of the upper part of the inner cap body 37 and the bottom wall of the closed annular space as a screen mesh structure, the produced water can flow smoothly, and meanwhile, the vortex reactor 38 is prevented from passing through the screen mesh.
Wherein the vortex reactor 38 is adapted to the mesh structure, and the mesh diameter of the mesh structure is smaller than the diameter of the vortex reactor 38.
Further, to facilitate the addition or removal of the vortex reactor 38 into the annular space between the inner cap body 37, the inner cap body 37 and the outer cap body 34 to meet operational requirements. The upper ends of the closed annular spaces among the inner cap body 37, the inner cap body 37 and the outer cap body 34 are respectively provided with a feeding pipe for adding the vortex reactor 38. At the lower end of the closed annular space between the inner cap body 37, the inner cap body 37 and the outer cap body 34, a discharge pipe for discharging the vortex reactor 38 is provided, respectively. The feeding pipe and the discharging pipe are both provided with flange blind plates for controlling the on-off of the feeding pipe and the discharging pipe.
Wherein the inlet end of the feeding pipe passes through and is fixed on the top wall of the tank-shaped body 12; the inlet end of the discharge pipe is communicated with the inner cap body 37, the lower end of the closed annular space between the inner cap body 37 and the outer cap body 34, and the outlet end of the discharge pipe sequentially passes through the outer cap body 34, the first cylinder body 35 and the tank-shaped body 12 and is exposed outside the tank-shaped body 12.
In order to make the produced water entering the first liquid passing line 20, the produced water discharged from the water inlet pipe 16 and the sewage containing water discharged from the sixth liquid passing line 22 more uniform during collection and discharge, thereby improving the operation effect. As shown in fig. 2, the oil removing device 2 further includes: a first water distribution system 39, a second water distribution system 40 and a water collection system 41. Wherein, the first water distribution system 39 is sleeved at the upper end of the outer cap body 34, and the inlet end is connected with the outlet end of the water inlet pipe 16; the second water distribution system 40 is sleeved on the upper part of the first cylinder 35, and the inlet end of the second water distribution system is connected with the outlet end of the sixth liquid passing pipeline 22; the water collecting system 41 is sleeved in the middle of the outer cap body 34, and the outlet end is connected with the inlet end of the first liquid passing line 20.
Further, as shown in fig. 2, first water distribution system 39 includes: the first water distribution groove 3901 sleeved on the upper end of the outer cap body 34, a first water distribution main pipe 3902, a first water distribution branch pipe 3903 and a first bell mouth 3904 which are sequentially connected with the outlet end of the first water distribution groove 3901, and the outlet end of the water inlet pipe 16 is connected with the inlet end of the first water distribution groove 3901. Second water distribution system 40 includes: a second water distributing groove 4001 sleeved on the upper part of the first cylinder 35, a second water distributing main pipe 4002, a second water distributing branch pipe 4003 and a second bell mouth 4004 which are sequentially connected with the outlet end of the second water distributing groove 4001, wherein the second water distributing groove 4001 is communicated with the outer cap body 34 below the inner cap body 37 through a sixth liquid passing pipeline 22. The water collecting system 41 includes: a water collecting tank 4101 sleeved in the middle of the outer cap body 34, a water collecting main pipe 4102, a water collecting branch pipe 4103 and a third bell 4104 which are sequentially connected with the inlet end of the water collecting tank 4101, wherein the inlet end of the first liquid passing pipeline 20 is connected with the outlet end of the water collecting tank 4101, and the outlet end is communicated with the lower end of the inner cap body 37.
After the produced water is discharged from the water inlet pipe 16, the produced water sequentially flows through the first water distribution groove 3901, the first water distribution main pipe 3902, the first water distribution branch pipe 3903 and the first bell mouth 3904 and is discharged from the first bell mouth 3904. Before entering the first liquid passing line 20, the produced water flows through the third bell 4104, the branch water collecting pipe 4103, the main water collecting pipe 4102 and the water collecting tank 4101 in sequence, and is discharged into the first liquid passing line 20 through the water collecting tank 4101. After being discharged from the sixth liquid flowing line 22, the produced water flows through the second water distribution tank 4001, the second water distribution main pipe 4002, the second water distribution branch pipe 4003 and the second bell mouth 4004 in sequence and is discharged from the second bell mouth 4004.
Through setting up first distributing channel 3901, second distributing channel 4001 and water catch bowl 4101, provide the storage position for the produced water to carry out subsequent distribution, catchment operation. Through setting up first horn mouth 3904, second horn mouth 4004 and third horn mouth 4104, reduced drainage speed and catchment speed, further improved the operating efficiency.
Further, to improve the produced water collection and discharge effect, the first bell mouth 3904 and the second bell mouth 4004 may be disposed to open upward while the third bell mouth 2004 is disposed to open downward.
In order to facilitate the air in the second oil removing area 14 to be discharged, the smooth oil removing operation is prevented from being influenced. As shown in fig. 2, the oil removing device 2 further includes: a vent tube 42 passing through and fixed to the first annular baffle 36; and an exhaust pipe 43 passing through and fixed to the top wall of the can body 12.
When air exists in the second oil removing area 14, the air in the second oil removing area 14 automatically moves upwards along the vent pipe 42 to the first oil removing area 13 along with the continuous injection of the produced water into the second oil removing area 14, and is discharged out of the tank-shaped body 12 through the vent pipe 43.
In order to allow the first oil outlet pipe 17 to perform oil discharge operation at any time, it is not limited by the level of produced water in the tank body 12. This deoiling device 2 still includes: a floating oil collector 44 (shown in figure 2). The floating oil recovery device 44 is connected with the inlet end of the first oil outlet pipe 17.
The floating oil collector 44 is conventional in the art and is commercially available to those skilled in the art, and may be manufactured and sold by voncyn mechanical manufacturing company, inc.
To facilitate mounting or dismounting of the line mixer 21. As shown in fig. 2, the oil removing device 2 further includes: a first gate valve 45 and a second gate valve 46. Wherein a first gate valve 45 is arranged on the first liquid passing line 20 upstream of the two injection openings. A second gate valve 46 is provided on the first liquid line 20 downstream of the line mixer 21.
When the line mixer 21 needs to be mounted and dismounted, the first gate valve 45 and the second gate valve 46 only need to be closed at the same time.
In order to increase the collision area of sewage containing water when the sewage flows downwards, the oil-water separation effect is improved, and suspended matters can move downwards conveniently. An annular bracket is sleeved on the first cylinder 35 below the second water distribution system 40, and a plurality of inclined pipes which are communicated up and down are arranged on the annular bracket.
Wherein, the 'up-and-down communication' means that: the upper part and the lower part of the inclined tube are communicated through the inclined tube. And, annular bracket and a plurality of pipe chute looks adaptation, annular bracket can be for being provided with the plate body of a plurality of pipe chute mounting holes.
In the embodiment of the present invention, as shown in fig. 2, a partition 47 is sleeved on the first cylinder 35 below the second water distribution system 40. This partition 47 includes: a second barrel 4701 and a second annular baffle 4702. Wherein, the second cylinder 4701 is sleeved outside the first cylinder 35 and has a distance with the first cylinder 35 and the tank-shaped body 12; the inner ring and the outer ring of the second annular baffle 4702 are connected to the upper end of the second cylinder 4701 and the outer wall of the first cylinder 35, respectively.
Through setting up second barrel 4701 and second annular baffle 4702 to make second barrel 4701 cover outside first barrel 35, and with first barrel 35 and jar form body 12 between have the interval, make the entry end of outlet pipe 19 pass the lateral wall of jar form body 12 in order simultaneously, behind the lateral wall of first barrel 35, set up in the annular space that separator 47 and first barrel 35 formed, avoided in drainage process, the suspended solid that sinks to jar form body 12 bottom is taken out under the suction effect of water collection system 41 (separator 47 has played the separation effect), thereby influence the smooth going on of whole operation.
In an embodiment of the present invention, as shown in fig. 1, the produced water treatment system further includes: the dirty oil tank 24 and the first water pump 25 are connected in series to the first oil outlet pipe 17 and the second oil outlet pipe 18 via a seventh liquid passing line 26.
By providing the dirty oil tank 24, a storage space is provided for the crude oil discharged from the oil removing device 2, so that the crude oil can be recovered. The first water pump 25 is provided to facilitate the pumping out of the crude oil in the dirty oil tank 24 for subsequent other operations.
In order to facilitate the extraction of the produced water from the recovery water tank 7 and the discharge of the produced water back to the oil removing device 2 through the fourth liquid passing line 10. As shown in fig. 1, the produced water treatment system further comprises: and a second water pump 27 disposed at an inlet end of the fourth liquid passing line 10.
In an embodiment of the present invention, as shown in fig. 1, the produced water treatment system further includes: the sludge pool 28, the third water pump 29, the centrifugal dehydrator 30 and the sludge truck 31 are sequentially communicated with the outlet end of the perforated sludge discharge pipe 23 through an eighth liquid passing pipeline 32.
When the oil removing device 2 discharges suspended matter in the produced water sunk to the bottom thereof from the perforated sludge pipe 23, the suspended matter flows into the sludge pond 28 through the eighth liquid passing line 32. At this time, the third water pump 29 is turned on to pump out the suspended solids, and the suspended solids flow into the centrifugal dehydrator 30, and are dehydrated by the centrifugal dehydrator 30, and the treated suspended solids are discharged into the sludge truck 31, thereby completing the treatment of the suspended solids in the produced water.
In the operation process, the suspended matters enter the sludge tank 28 along with water and crude oil in the produced water, so that the suspended matters are solidified by arranging the centrifugal dehydrator 30 so as to be discharged into the sludge truck 31 for subsequent treatment. Through setting up sludge impoundment 28, for the suspended solid in the produced water provides the discharge position, avoid the suspended solid deposit in the bottom of jar body 12 to influence deoiling device 2's normal use. Through setting up third water pump 29, for the suspended solid that the suction was adopted aquatic provides power, guarantee the smooth going on of suspended solid processing operation.
Further, to effect recovery of water and crude oil from the produced water in sludge basin 28. As shown in fig. 1, the produced water treatment system further comprises: and a ninth liquid passing line 33 having an inlet end communicated with the sludge tank 28 and the centrifugal dehydrator 30, respectively, and an outlet end communicated with the second inlet end of the recovery water tank 7.
During operation, only the second water pump 27 needs to be started, and water and crude oil in produced water in the sludge tank 28 can be pumped into the recovery water tank 7 from the ninth liquid passing line 33 for circulation treatment.
In a second aspect, the embodiments of the present invention provide a process for produced water treatment using the above system, the process comprising:
the produced water is discharged into an oil removal device 2, and the oil removal device 2 is utilized to carry out oil removal treatment on the produced water.
The produced water after oil removal treatment is discharged to a filtering unit 4 through a first liquid passing pipeline 5 by utilizing a lifting pump 3, and the produced water is filtered.
And discharging the filtered produced water into the water storage tank 1.
And reversely discharging part of produced water in the water storage tank 1 to the filtering unit 4 through a second liquid pipeline 8 by using a backwashing water pump 6, and backwashing the filtering unit 4.
And discharging impurities obtained by backwashing the filter unit 4 into the recovery water tank 7 through the third liquid passing line 9, and continuously discharging produced water in the recovery water tank 7 into the oil removing device 2 through the fourth liquid passing line 10 in the process.
The produced water is treated by using the process, a plurality of structures are not needed to be matched, the occupied area is small, and the cost is low; the operation flow is short, and the operation efficiency is high. The produced water discharged by the oil removing device 2 is discharged to the filtering unit 4 for filtering, so that crude oil and suspended matters in the produced water are further removed, and stratum pollution is prevented.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. A produced water treatment system comprising: a water storage tank (1);
characterized in that the system further comprises: the device comprises an oil removing device (2), a lifting pump (3), a filtering unit (4), a backwashing water pump (6) and a recovery water tank (7);
the oil removal device (2), the lifting pump (3) and the filtering unit (4) are sequentially connected with the inlet end of the water storage tank (1) through a first liquid passing pipeline (5);
the outlet end of the water storage tank (1) is communicated with the filtering unit (4) through a second liquid passing pipeline (8);
the back washing water pump (6) is arranged on the second liquid passing pipeline (8);
the first inlet end of the recovery water tank (7) is respectively communicated with the filtering unit (4) through a third liquid passing pipeline (9), and the outlet end of the recovery water tank is communicated with the inlet end of the oil removing device (2) through a fourth liquid passing pipeline (10);
the oil removing device (2) comprises:
the device comprises a tank-shaped body (12), wherein a first oil removing area (13), a second oil removing area (14) and a reaction area (15) which are independent of each other are arranged in the tank-shaped body (12); the oil removing device (2) further comprises: the device comprises an outer cap body (34), a first cylinder body (35) and a first annular baffle (36); wherein the opening of the outer cap body (34) is downward, and the lower end of the outer cap body (34) is vertically connected with the bottom wall of the tank-shaped body (12); the first cylinder (35) is sleeved on the outer cap body (34), and the lower end of the first cylinder (35) is connected with the bottom wall of the tank-shaped body (12); the inner ring of the first annular baffle (36) is connected with the upper end of the first cylinder (35); the outer ring of the first annular baffle (36) is connected with the inner wall of the tank-shaped body (12); the can-shaped body (12), the outer cap (34), the first barrel (35) and the first ring baffle (36) enclose the first oil removal zone (13); the first cylinder (35), the first annular baffle (36) and the tank-shaped body (12) enclose the second oil removal area (14); the inner cavity of the outer cap body (34) forms the reaction zone (15);
the inlet end of the water inlet pipe (16) is positioned outside the tank-shaped body (12), and the outlet end of the water inlet pipe penetrates through the second oil removing area (14) and then is arranged in the first oil removing area (13);
the outlet end of the first oil outlet pipe (17) is positioned outside the tank-shaped body (12), and the inlet end of the first oil outlet pipe penetrates through the side wall of the tank-shaped body (12) and then is arranged in the first oil removing area (13) above the outlet end of the water inlet pipe (16);
the outlet end of the second oil outlet pipe (18) is positioned outside the tank-shaped body (12), and the inlet end of the second oil outlet pipe penetrates through the side wall of the tank-shaped body (12) and then is arranged at the upper part of the second oil removing area (14);
the inlet end of the water outlet pipe (19) is communicated with the lower part of the second oil removing area (14), and the outlet end of the water outlet pipe is arranged outside the tank-shaped body (12);
the inlet end of the fifth liquid passing pipeline (20) is positioned in the first oil removing area (13) below the outlet end of the water inlet pipe (16), the outlet end of the fifth liquid passing pipeline is positioned in the reaction area (15), and the fifth liquid passing pipeline (20) is sequentially provided with two injection ports and a pipeline mixer (21) along the liquid passing direction;
and the inlet end of a sixth liquid passing pipeline (22) is communicated with the reaction zone (15), the outlet end of the sixth liquid passing pipeline is communicated with the second oil removing zone (14), and the outlet end of the sixth liquid passing pipeline (22) is positioned below the inlet end of the second oil outlet pipe (18).
2. The system according to claim 1, wherein the filtering unit (4) comprises: a first filter (401) and a second filter (402) arranged in sequence on the first liquid passing line (5) in the liquid passing direction.
3. The system of claim 2, further comprising: an air compressor (11) having an outlet end communicating with the first liquid passing line (5) between the first filter (401) and the second filter (402), and the first liquid passing line (5) between the second filter (402) and the water storage tank (1), respectively.
4. The system according to claim 1, characterized in that said oil removal device (2) comprises: a plurality of perforated sludge discharge pipes (23) connected in sequence;
the perforated sludge discharge pipes (23) penetrate through the first oil removing area (13), the second oil removing area (14) and the lower part of the reaction area (15).
5. The system of claim 4, further comprising: and the sump oil tank (24) and the first water pump (25) are sequentially communicated with the first oil outlet pipe (17) and the second oil outlet pipe (18) through a seventh liquid passing pipeline (26).
6. The system of claim 5, further comprising: and the second water pump (27) is arranged at the inlet end of the fourth liquid passing pipeline (10).
7. The system of claim 6, further comprising: a sludge pool (28), a third water pump (29), a centrifugal dehydrator (30) and a sludge truck (31) which are communicated with the outlet end of the perforated sludge discharge pipe (23) in sequence through an eighth liquid passing pipeline (32).
8. The system of claim 7, further comprising: and the inlet end of a ninth liquid passing pipeline (33) is respectively communicated with the sludge pool (28) and the centrifugal dehydrator (30), and the outlet end of the ninth liquid passing pipeline is communicated with the second inlet end of the recovery water pool (7).
9. A process for the treatment of produced water using the system of any one of claims 1 to 8, wherein the process comprises:
the produced water is discharged into an oil removal device (2), and the oil removal device (2) is utilized to carry out oil removal treatment on the produced water;
the produced water after being subjected to oil removal treatment is discharged to a filtering unit (4) through a first liquid passing pipeline (5) by utilizing a lifting pump (3), and the produced water is filtered;
discharging the filtered produced water into a water storage tank (1);
reversely discharging part of the produced water in the water storage tank (1) to the filtering unit (4) through a second liquid passing pipeline (8) by using a backwashing water pump (6), and backwashing the filtering unit (4);
discharging impurities obtained by backwashing the filtering unit (4) into a recovery water tank (7) through a third liquid passing pipeline (9), and continuously discharging the produced water in the recovery water tank (7) into the oil removing device (2) through a fourth liquid passing pipeline (10) in the process;
utilize deoiling device (2) is right the produced water carries out deoiling and handles, include:
discharging the produced water into the tank-shaped body (12) from the inlet end of the water inlet pipe (16) so that the produced water is discharged into the first oil removal area (13) from the outlet end of the water inlet pipe (16), and performing first oil-water separation on the produced water; when the liquid level of the crude oil in the tank-shaped body (12) reaches the inlet end position of the first oil outlet pipe (17), the crude oil above the liquid level is discharged out of the tank-shaped body (12) from the outlet end of the first oil outlet pipe (17);
the produced water enters the fifth flow line (20) and enters the reaction zone (15) after flowing through the pipe mixer (21); adding a coagulant and a flocculant into the two injection ports respectively, so that the produced water is mixed with the coagulant and the flocculant and then enters the reaction zone (15) to react in the reaction zone (15);
the produced water enters the sixth liquid passing pipeline (22) after the reaction in the reaction area (15) and flows into the second oil removal area (14) from the sixth liquid passing pipeline (22), the produced water is subjected to secondary oil-water separation, a valve for controlling the second oil outlet pipe (18) is opened, the crude oil in the second oil removal area (14) is discharged to the outside of the tank-shaped body (12) from the outlet end of the second oil outlet pipe (18), and the produced water is discharged from the water outlet pipe (19) to the tank-shaped body (12).
CN201710794243.0A 2017-09-06 2017-09-06 Produced water treatment system and process Active CN109455831B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1458074A (en) * 2003-05-14 2003-11-26 大庆油田有限责任公司 Waste water treating process for polymer oil displacing and producing system
CN204058119U (en) * 2014-08-01 2014-12-31 中油辽河工程有限公司 Regulate oil removing pot
CN106277505A (en) * 2016-09-06 2017-01-04 西安石油大学 A kind of oil field reinjection water total system
CN106621484A (en) * 2015-10-30 2017-05-10 新疆石油工程设计有限公司 Sedimentation oil removal tank, produced water treatment system and treatment method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1458074A (en) * 2003-05-14 2003-11-26 大庆油田有限责任公司 Waste water treating process for polymer oil displacing and producing system
CN204058119U (en) * 2014-08-01 2014-12-31 中油辽河工程有限公司 Regulate oil removing pot
CN106621484A (en) * 2015-10-30 2017-05-10 新疆石油工程设计有限公司 Sedimentation oil removal tank, produced water treatment system and treatment method
CN106277505A (en) * 2016-09-06 2017-01-04 西安石油大学 A kind of oil field reinjection water total system

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