CN1458074A - Waste water treating process for polymer oil displacing and producing system - Google Patents
Waste water treating process for polymer oil displacing and producing system Download PDFInfo
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- CN1458074A CN1458074A CN 03123565 CN03123565A CN1458074A CN 1458074 A CN1458074 A CN 1458074A CN 03123565 CN03123565 CN 03123565 CN 03123565 A CN03123565 A CN 03123565A CN 1458074 A CN1458074 A CN 1458074A
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Abstract
The present invention relates to the waste water treating process for polymer oil displacing and producing system. The present invention features that oil-bearing waste water from oil well water port is treated in deoiling unit, filters and outwards conveying tank and water is pumped by the outwards conveying pump from the outwards conveying tank to water injection station; partial water is pumped by the reverse flushing pump to the filters for reverse flushing; the sludge from the bottom of the deoiling unit is concentrated in the sludge concentrating tank and the supernatant from the sludge concentrating tank is drained to the water recovering reservoir; the waste water in the water recovering reservoir is pumped by the recovering pump to the deoiling unit for re-treatment; and dirty oil from the deoiling unit is pumped by the dirty oil pump to the oil statioin. The present invention has simple technological process and less environment investment.
Description
Technical field:
The present invention relates to oilfield polymer flooding extraction sink drainage treatment process, belong to polymer flooding extraction sink drainage treatment process.
Background technology:
Because oilfield polymer flooding extraction sewage contains polyacrylamide, make the water quality characteristic of extraction sewage that wide variation take place, become and be difficult to more handle, adopt precipitation apparatus and system handles technology in the conventional oil-containing sewage treatment technique in present oil field to be difficult to reach oil-contaminated water of oil field re-injection water water-quality guideline, in order to reach oil-contaminated water of oil field re-injection water water-quality guideline, need by increasing the volume of precipitation apparatus, the measures such as effective residence time that improve sewage improve polymer flooding extraction sewage treating efficiency and effect, thereby cause increasing negative effects such as construction investment and floor space.
The technology of Daqing oil field oily water treatment, what mostly adopt is the treatment process that the two-stage sedimentation adds two-stage filtration, its final outflow water has reached the oil field reinjection water water-quality guideline.In the polymer flooding water because the existence of polymkeric substance, make the character of recovered water that very big variation take place, compare with the water drive recovered water of routine, the viscosity that recovered water occurred obviously increases, the emulsification degree obviously increases, interfacial charge obviously increases, the ability of the mutual coalescence of oil droplet obviously descends, the speed of oily water separation is obviously descended the degradation characteristic, and these characteristics are brought sizable difficulty to sewage disposal.
At present for polymer flooding water is effectively handled, it is huge to use two-stage sedimentation in the existing processing technological flow to be that coagulant precipitation jar and natural subsidence jar carry out the equipment volume of oily water separation, floor space is big, effectively the residence time is long, processing efficiency is low, complex process, construction investment is big.
Summary of the invention:
In order to overcome the deficiency that existing oilfield polymer flooding extraction sewage treatment process processing efficiency is low, treatment facility is bulky, investment is big, the invention provides polymer flooding extraction sink drainage treatment process, the surplus pressure of this technology utilization transverse flow coalescence degreaser and the outlet of hydrocyclone small-sized efficient treatment facility, directly filter, filter surge tank in the existing treatment process and filter needed necessaries of lift pump and affiliated facility thereby reduced.
The technical solution adopted in the present invention is: the oily(waste)water that this polymer flooding extraction sink drainage treatment process, oil station come the mouth of a river enters two-stage filter, outer defeated jar successively through oil eliminator, and output pump will fail the water of jar outward and import water-injection plant; The purifying waste water lifting that backwashing pump will be failed outward in the jar enters two-stage filter successively, preceding 7～9 minutes input concentration tanks of two-stage filter back flushing draining, and ponds are reclaimed in inputs in back 8～6 minutes of back flushing draining; The settlement separate mud that goes out in oil eliminator bottom is entered the mud concentration tank, and mud is through after concentrating, and the supernatant liquor of mud concentration tank enters and reclaims the pond; Reclaiming pump will reclaim sewage lifting in the pond and enter oil eliminator and handle; Sump pump will pump into the oil station from the sump oil that oil eliminator is gone into the slop oil tank.
Above-mentioned oil eliminator can be the coalescent or hydrocyclone of transverse flow, and strainer can be two-stage Two-layer filter or secondary dual flow filter; The time that two-stage filter back flushing draining enters concentration tank can be preceding 8 minutes, and the time that the back flushing draining enters the recovery pond can be back 7 minutes, and the total flush time of back flushing is 15 minutes; The oil station comes the oily(waste)water hydraulic pressure at the mouth of a river between preceding 0.5～0.8MPa.
The invention has the beneficial effects as follows, owing to adopted the technical process in the such scheme, in coalescent pack combination of components to a transverse flow coalescence degreaser, realized the assemblingization of waste-oil scavenger, high efficiency and small-sized integrated, improved the efficient of oil removing, shortened the effective residence time of sewage in equipment, hydrocyclone utilizes centrifugal action with can removed oil droplet separation remove in the polymer flooding water, utilize the pressure of hydrocyclone outlet water outlet directly to enter the efficient treatment facility filtration of dual flow filter again, utilize dual flow filter filtering velocity height, can reach 20～30m/h, it is simple to make treatment process have a technical process, equipment volume is little, the characteristics that equipment work efficient height and construction investment are little, last water outlet all can reach oil-contaminated water of oil field re-injection water water-quality guideline.
Description of drawings:
Fig. 1 is the process flow sheet that the present invention adopts the transverse flow coalescence degreaser;
Fig. 2 is the process flow sheet that the present invention adopts the hydrocyclone oil eliminator.
1-oil eliminator among the figure, the 2-strainer, the 3-strainer, the 4-backwashing pump, 5-back flushing and outer water delivery jar, the 6-output pump, 7-mud lift pump, 8-mud concentration tank, 9-reclaims the pond, and 10-sewage reclaims pump, the 11-slop oil tank, the 12-sump pump, the mouth of a river is come at 13-oil station.
Embodiment
Below in conjunction with drawings and the specific embodiments will the invention will be further described:
This polymer flooding extraction sink drainage treatment process, oily station come the oily(waste)water at the mouth of a river 13 to enter strainer (2,3), outer defeated jar 5 successively through oil eliminator 1, and output pump 6 will be failed the water input water-injection plant of jar 5 outward; Backwashing pump 4 will be failed purifying waste water in jars 5 outward and promote and enter strainer (2,3) successively and carry out back flushing, and preceding 7～9 minutes of strainer (2,3) back flushing draining enter mud concentration tank 8, enter in back 8～6 minutes of the back flushing draining to reclaim pond 9; The settlement separate mud that goes out in oil eliminator 1 bottom is entered mud concentration tank 8, and the supernatant liquor in the mud concentration tank 8 enters and reclaims pond 9; Reclaiming pump 10 will reclaim sewage lifting in the pond 9 and enter oil eliminator 1 and handle; Sump pump 12 will pump into oil station, processed again from the sump oil that oil eliminator 1 enters the slop oil tank 11.
Above-mentioned oil eliminator 1 can be the coalescent or hydrocyclone oil eliminator of transverse flow, strainer (2,3) can be two-stage Two-layer filter or secondary dual flow filter (2,3), can be supporting with it when using transverse flow coalescence degreaser 1 with two-stage Two-layer filter (2,3), visible accompanying drawing 1, can be supporting with it when using hydrocyclone oil eliminator 1 with the two-stage bidirectional strainer, visible accompanying drawing 2; The time that strainer (2,3) back flushing draining enters concentration tank 8 can be back flushing preceding 8 minutes, and the back flushing draining enters the time of reclaiming behind the pond 9 and can be after the back flushing 7 minutes, and the total flush time of back flushing is 15 minutes; The oil station comes the oily(waste)water hydraulic pressure at the mouth of a river 13 between 0.5～0.8MPa.
Owing to adopted the technical process in the such scheme, in coalescent pack combination of components to a transverse flow coalescence degreaser 1, realized the assemblingization of waste-oil scavenger, high efficiency and small-sized integrated, improve the efficient of oil removing, shortened the effective residence time of sewage in equipment; Coalescent by coarse; remove an oil slick and a bigger suspended solids material; the oil in water emulsion of Qu Chuing does not carry out further oil droplet collision coalescence by the modification coalescing element again and is removed; improved coalescence efficiency; and further improved the processing efficiency of equipment, guaranteed the influent quality of fillter section, utilized oil eliminator 1 water outlet surplus pressure directly to enter two-stage Two-layer filter (2; 3) filter, last water outlet has reached oil-contaminated water of oil field re-injection water water-quality guideline.
The hydrocyclone oil eliminator utilizes action of centrifugal force with can removed oil droplet separation remove in the polymer flooding water, utilize the pressure of hydrocyclone outlet water outlet directly to enter the efficient treatment facility filtration of dual flow filter again, utilize dual flow filter filtering velocity height, can reach 20～30m/h, last water outlet has also reached oil-contaminated water of oil field re-injection water water-quality guideline.
Adopting in embodiment 1, the accompanying drawing 1 with the transverse flow coalescence degreaser serves as that the main two-stage double medium filtration that adds is handled the polymer flooding water treatment system technical process of forming, the oil station comes the oily(waste)water at the mouth of a river 13 entering transverse flow coalescence degreaser 1 under the pressure condition between 0.5～0.8MPa, oil eliminator 1 water outlet enters Two-layer filter 2 one time, strainer 2 water outlets enter quadratic bilevel filtering material filter 3, strainer 3 water outlets enter outer water delivery jar 5, and output pump 6 is passed to water-injection plant outward with the water in back flushing or the outer water delivery jar 5; Backwashing pump 4 is the lifting of purifying waste water in back flushing and the outer water delivery jar 5, successively Two-layer filter 2 and quadratic bilevel filtering material filter 3 carried out the regeneration of hay tank filtrate respectively; Entered mud concentration tank 8 in preceding 8 minutes of Two-layer filter 2 and the 3 back flushing drainings of quadratic bilevel filtering material filter and concentrate, entered in back 7 minutes of the back flushing draining and to reclaim pond 9, the total flush time of back flushing is 15 minutes; The settlement separate mud in transverse flow coalescence degreaser 1 bottom enters mud concentration tank 8 and concentrates; Supernatant liquor after mud concentration tank 8 concentrates enters and reclaims pond 9; Sewage reclaims pump 10 and will reclaim the sewage lifting of reclaiming in the pond 9 and enter transverse flow coalescence degreaser 1 and handle; The sump oil that transverse flow coalescence degreaser 1 is discharged enters slop oil tank 11, and sump pump 12 pumps into the oil station with the sump oil in the slop oil tank 11 and carries out processed again.
Adopting with the hydrocyclone oil eliminator in embodiment 2, the accompanying drawing 2 is the main polymer flooding water treatment system technical process that the two-stage bidirectional filter process is formed that adds, oil is stood the oily(waste)water at the mouth of a river 13 to enter 1 water outlet of hydrocyclone oil eliminator under the pressure condition greater than 0.5MPa and is entered dual flow filter 2 one time, dual flow filter 2 water outlets enter secondary dual flow filter 3,3 water outlets of secondary dual flow filter enter back flushing or outer water delivery jar 5, and output pump 6 is passed to water-injection plant outward with the water in back flushing or the outer water delivery jar 5; Backwashing pump 4 is the lifting of purifying waste water in back flushing or the outer water delivery jar 5, successively dual flow filter 2 and secondary dual flow filter 3 carried out the regeneration of hay tank filtrate respectively; Entered mud concentration tank 8 in preceding 8 minutes of dual flow filter 2 and the 3 back flushing drainings of secondary dual flow filter and concentrate, entered in back 7 minutes of the back flushing draining and to reclaim pond 9, the total flush time of back flushing is 15 minutes; Sewage reclaims pump 10 and will reclaim the sewage lifting of reclaiming in the pond 9 and enter hydrocyclone oil eliminator 1 and handle; The sump oil that hydrocyclone oil eliminator 1 is discharged enters slop oil tank 11, and sump pump 12 pumps into the oil station with the sump oil in the slop oil tank 11 and carries out processed again.
This shows, adopt above-mentioned two cover polymer flooding water system handles technical process, simplified the technical process of polymer flooding water system handles, reduced equipment volume, reduced floor space, the working efficiency and the effluent quality of equipment have been improved, simplify treatment process and reduced construction investment, the water inlet oleaginousness less than 1000～2000mg/L, under the condition of suspended solids content less than 150mg/L, two cover polymer flooding water system handles technology final outflow water water quality have reached oil-contaminated water of oil field re-injection water water-quality guideline.
Claims (4)
1, polymer flooding extraction sink drainage treatment process is characterized in that: the oil station comes the oily(waste)water at the mouth of a river (13) to enter strainer (2,3), outer defeated jar (5) successively through oil eliminator (1), and output pump (6) will be failed the water input water-injection plant of jar (5) outward; The purifying waste water lifting that backwashing pump (4) will be failed outward in jar (5) enters strainer (2,3) successively, preceding 7～9 minutes input concentration tanks (8) of strainer (2,3) back flushing draining, and ponds (9) are reclaimed in inputs in back 8～6 minutes of back flushing draining; The settlement separate mud that goes out in oil eliminator (1) bottom is entered mud concentration tank (8), and mud is through after concentrating, and the supernatant liquor of mud concentration tank (8) enters and reclaims pond (9); Reclaiming pump (10) will reclaim sewage lifting in the pond (9) and enter oil eliminator (1) and handle; Sump pump (12) will pump into the oil station from the sump oil that oil eliminator (1) is gone into the slop oil tank (11).
2, polymer flooding extraction sink drainage treatment process according to claim 1, it is characterized in that: oil eliminator (1) can be the coalescent or hydrocyclone of transverse flow, and strainer (2,3) can be two-stage Two-layer filter or secondary dual flow filter.
3, polymer flooding extraction sink drainage treatment process according to claim 1, it is characterized in that: strainer (2,3) back flushing draining time of entering concentration tank (8) can be preceding 8 minutes, and the back flushing draining enters the time of reclaiming pond (9) and can be back 7 minutes.
4, polymer flooding extraction sink drainage treatment process according to claim 1 is characterized in that: the oil station comes the oily(waste)water hydraulic pressure at the mouth of a river (13) between preceding 0.5～0.8MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03123565 CN1458074A (en) | 2003-05-14 | 2003-05-14 | Waste water treating process for polymer oil displacing and producing system |
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| CN 03123565 CN1458074A (en) | 2003-05-14 | 2003-05-14 | Waste water treating process for polymer oil displacing and producing system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7695697B2 (en) | 2004-12-23 | 2010-04-13 | Franco D'Orazio Pessia | Devices for crude oil treatment and upgrading |
| CN104876378A (en) * | 2015-06-08 | 2015-09-02 | 大庆三宝环保科技有限公司 | System treatment process for ternary compound drive produced sewage |
| CN108298659A (en) * | 2018-03-27 | 2018-07-20 | 西安长庆科技工程有限责任公司 | The processing system and technique of oilfield filter backwash sewage and sludge condensation supernatant |
| CN109205819A (en) * | 2018-11-22 | 2019-01-15 | 宝钢工程技术集团有限公司 | Compact turbid circulating water treating stations |
| CN109205910A (en) * | 2018-11-22 | 2019-01-15 | 宝钢工程技术集团有限公司 | Compact turbid circulating water treating stations |
| CN109455831A (en) * | 2017-09-06 | 2019-03-12 | 中国石油天然气股份有限公司 | Produced water treatment system and process |
| CN110104813A (en) * | 2019-05-24 | 2019-08-09 | 中国石油天然气股份有限公司 | Sequencing batch settling and filtering device for oilfield produced water and treatment process thereof |
| CN110759519A (en) * | 2019-10-10 | 2020-02-07 | 上海环境绿色生态修复科技有限公司 | Groundwater soil combined remediation device for gas station pollution area |
| CN111285532A (en) * | 2019-12-24 | 2020-06-16 | 大庆油田有限责任公司 | Corrosion inhibitor-containing gas field water reinjection treatment device and process |
| CN114432784A (en) * | 2020-11-03 | 2022-05-06 | 中国石油化工股份有限公司 | Oil field produced liquid pre-separation equipment with bidirectional cleaning function and control method thereof |
-
2003
- 2003-05-14 CN CN 03123565 patent/CN1458074A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7695697B2 (en) | 2004-12-23 | 2010-04-13 | Franco D'Orazio Pessia | Devices for crude oil treatment and upgrading |
| CN104876378A (en) * | 2015-06-08 | 2015-09-02 | 大庆三宝环保科技有限公司 | System treatment process for ternary compound drive produced sewage |
| CN104876378B (en) * | 2015-06-08 | 2016-09-21 | 大庆三宝环保科技有限公司 | Ternary combination flooding extraction sewage system processes technique |
| CN109455831A (en) * | 2017-09-06 | 2019-03-12 | 中国石油天然气股份有限公司 | Produced water treatment system and process |
| CN109455831B (en) * | 2017-09-06 | 2021-08-31 | 中国石油天然气股份有限公司 | Produced water treatment system and process |
| CN108298659A (en) * | 2018-03-27 | 2018-07-20 | 西安长庆科技工程有限责任公司 | The processing system and technique of oilfield filter backwash sewage and sludge condensation supernatant |
| CN109205910A (en) * | 2018-11-22 | 2019-01-15 | 宝钢工程技术集团有限公司 | Compact turbid circulating water treating stations |
| CN109205819A (en) * | 2018-11-22 | 2019-01-15 | 宝钢工程技术集团有限公司 | Compact turbid circulating water treating stations |
| CN110104813A (en) * | 2019-05-24 | 2019-08-09 | 中国石油天然气股份有限公司 | Sequencing batch settling and filtering device for oilfield produced water and treatment process thereof |
| CN110759519A (en) * | 2019-10-10 | 2020-02-07 | 上海环境绿色生态修复科技有限公司 | Groundwater soil combined remediation device for gas station pollution area |
| CN111285532A (en) * | 2019-12-24 | 2020-06-16 | 大庆油田有限责任公司 | Corrosion inhibitor-containing gas field water reinjection treatment device and process |
| CN114432784A (en) * | 2020-11-03 | 2022-05-06 | 中国石油化工股份有限公司 | Oil field produced liquid pre-separation equipment with bidirectional cleaning function and control method thereof |
| CN114432784B (en) * | 2020-11-03 | 2023-07-28 | 中国石油化工股份有限公司 | Oilfield produced fluid pre-separation equipment with bidirectional cleaning function and control method thereof |
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