CN103523982B - Electric coagulation oil-water settling separator - Google Patents
Electric coagulation oil-water settling separator Download PDFInfo
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- CN103523982B CN103523982B CN201310521673.7A CN201310521673A CN103523982B CN 103523982 B CN103523982 B CN 103523982B CN 201310521673 A CN201310521673 A CN 201310521673A CN 103523982 B CN103523982 B CN 103523982B
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- water
- oil
- pipe
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- air flotation
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 230000015271 coagulation Effects 0.000 title 1
- 238000005345 coagulation Methods 0.000 title 1
- 238000000926 separation method Methods 0.000 claims abstract description 39
- 238000005188 flotation Methods 0.000 claims abstract description 24
- 239000010802 sludge Substances 0.000 claims abstract description 6
- 238000009300 dissolved air flotation Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 43
- 239000012535 impurity Substances 0.000 abstract description 14
- 239000007787 solid Substances 0.000 abstract description 13
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000009297 electrocoagulation Methods 0.000 abstract 1
- 238000005192 partition Methods 0.000 abstract 1
- 235000019198 oils Nutrition 0.000 description 35
- 238000000034 method Methods 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 238000004581 coalescence Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Physical Water Treatments (AREA)
Abstract
The invention relates to an electrocoagulation oil-water settling separation device for separating oil, water and impurities from oilfield produced water. The device comprises a horizontal tank body, wherein the tank body is sequentially divided into a water inlet heating buffer area, an electrostatic separation area, an inclined plate oil removal area, an air flotation area and a water outlet buffer area by partition plates, the air flotation area is divided into an air flotation contact area and an air flotation separation area, an exhaust pipe is arranged at the top of the tank body, an oil discharge pipe is arranged at the upper part of the wall of the tank body, and a hot water pipe and a water return pipe are arranged in an oil layer near the oil discharge pipe; the lower part in the tank is provided with a perforated sludge discharge pipe and is connected to a sludge discharge header through a valve; and blow-off pipes are arranged on the lower walls of the pipes corresponding to the water inlet heating buffer zone, the electrostatic separation zone, the inclined plate oil removal zone, the air flotation zone and the water outlet buffer zone respectively and are connected to a blow-off header pipe through valves. The water treated by the device can effectively realize the separation of oil, water and solid impurities, and reaches the water quality standard of inlet water required by the next stage of filtration.
Description
Technical field
The present invention relates to oil field extracted water oily water separation treatment unit, specifically a kind of Electric-coagulationoil-water-sedimentatseparation oil-water-sedimentatseparation separation device that can realize oil field extracted water oil, water, impurity sedimentation separation.
Background technology
Along with periphery, oil field enters high water cut viscous heavy crude oil, because implementing the development scheme of water filling and the chemical displacement of reservoir oil, cause in Partial Block extraction oily(waste)water generally containing polymkeric substance, recovered water water quality characteristic is caused to there occurs change, be mainly manifested in sewage viscosity to increase, emulsification degree increases oil droplet and is difficult to coalescence separation, suspended solids attenuates little, existing gravity type boat davit slurry tank occurs inadaptable, settlement separate weak effect and processing efficiency reduce, and are only difficult to by action of gravity the separation realizing oil, water, solid impurity.Therefore, need the water quality characteristics for containing poly-rear recovered water at present, from between increase particle mutually coalescence ability, increase particle buoyance lift speed, improve the angle of the physical method of separating effect, improve oil, water, solid impurity velocity of separation carry out developing of associated processing equipment.
Summary of the invention
Change for latter period of oilfield development recovered water water quality characteristic, particularly chemical flooding tertiary oil recovery recovered water, cause the problem of recovered water oil, water, solid impurity separation difficulty, the invention provides Electric-coagulationoil-water-sedimentatseparation oil-water-sedimentatseparation separation device in.Water after this device process effectively can realize the separation of oil, water, solid impurity, reaches the influent quality standard entering next stage filtering requirement.
Technical scheme of the present invention is: a kind of Electric-coagulationoil-water-sedimentatseparation oil-water-sedimentatseparation separation device, comprise horizontal tank body, be divided into into water heated buffer zone successively by dividing plate in tank body, electrostatic separation district, swash plate oil-removing area, air flotation zone, water outlet buffer zone, described air flotation zone is separated into again contact zone of dissolved air flotation and flotation separation zone, wherein, described tank body top arranges vapor pipe, and tank skin top arranges oil exit pipe, and the oil reservoir near oil exit pipe arranges hot-water line and return water pipe; In tank, bottom arranges perforated sludge discharge pipe, and be connected to spoil disposal header by valve, and the pipe lower wall respectively corresponding to water inlet heated buffer zone, electrostatic separation district, swash plate oil-removing area, air flotation zone, water outlet buffer zone arranges blow-off pipe, and be connected to blowdown header by valve.
In addition, liquid-inlet pipe and well heater is provided with in the water inlet heated buffer zone in described horizontal tank body; Rising pipe is provided with in water outlet buffer zone.
The invention has the beneficial effects as follows: adopt said apparatus, first extraction sewage heat after entering horizontal tank, then pressure is relied on to enter electrostatic separation district, emulsifying effectiveness is eliminated by the effect of electric field, make emulsion can form by water/aqueous phase after electrostatic separation the drop constantly increased gradually to be easily separated, sinking under gravity will to bottom.The mixed solution level that have passed static separator flows into inclined plate sedimentation disengaging zone, make quite most condensation drop can continue collision coalescence to increase, be conducive to oil separation (floating) or water from water from oil, be separated the process of (sinking), thus realization oil, water, solid impurity are separated from mixed solution, the mixed solution completed after this process oily water separation continues to enter follow-up flotation separation zone.Gas-liquid multiphase mixing is utilized to close pump, produce many fine small bubbles (diameter only has about 20 μm), evenly discharge in water, utilize that micro-bubble adsorption realizes oil further, water, solid impurity are effectively separated, guarantee that the oleaginousness of final outflow water and suspended solids content reach the water-quality guideline entering next stage and filter.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
1-liquid-inlet pipe in figure, 2-well heater, 3-is intake heated buffer zone, 4-electrostatic separation district, 5-swash plate oil-removing area, 6-air flotation zone, 7-contact zone of dissolved air flotation, 8-flotation separation zone, 9-water outlet buffer zone, 10-vapor pipe, 11-blow-off pipe, 12-perforated sludge discharge pipe, 13-hot-water line, 14-return water pipe, 15-oil exit pipe, 16-rising pipe, 17-spoil disposal manifold, 18-blowdown header.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
As shown in Figure 1, this Electric-coagulationoil-water-sedimentatseparation oil-water-sedimentatseparation separation device comprises horizontal tank body, feed liquor heated buffer zone 3, electrostatic separation district 4, swash plate oil-removing area 5, air flotation zone 6, water outlet buffer zone 9 is divided into successively by dividing plate in tank body, described air flotation zone 6 is separated into again contact zone of dissolved air flotation 7 and flotation separation zone 8, wherein, described tank body top arranges vapor pipe 10, and tank skin top arranges oil exit pipe 15, arranges hot-water line 13 and return water pipe 14 near the oil reservoir of oil exit pipe 15; In tank, bottom arranges perforated sludge discharge pipe 12, and be connected to spoil disposal header 17 by valve, and the pipe lower wall respectively corresponding to water inlet heated buffer zone 3, electrostatic separation district 4, swash plate oil-removing area 5, air flotation zone 6, water outlet buffer zone 9 arranges blow-off pipe 11, and be connected to blowdown header 18 by valve.
In addition, liquid-inlet pipe 1 and well heater 2 is provided with in the water inlet heated buffer zone 3 in described horizontal tank body; Rising pipe 16 is provided with in water outlet buffer zone 9.
Concrete sepn process is: oil-containing extraction sewage enters feed liquor buffering heating zone 3 through pump lifting by liquid-inlet pipe 1 and heats through electric heater 2, mixed solution after heating relies on pressure itself to enter electrostatic separation district 4, emulsifying effectiveness is eliminated by the effect of electric field, make emulsion be formed gradually by water after electrostatic separation or aqueous phase and constantly increase drop, tentatively realize oil, water, solid impurity separate from mixed solution; Mixed solution level after oil, water, solid impurity are separated flows into swash plate oil-removing area 5 and does the increase of further droplet collision coalescence and be separated, thus removes oil and the solid impurity of part again; Oil-water mixture after inclined plate sedimentation is separated enters contact zone of dissolved air flotation 7 in flotation area 6 again and flotation separation zone 8 completes air supporting effect; Described air supporting effect and air supporting are the air sucked by gas-liquid multiphase pump outside the water of water outlet buffer zone 9 and tank body, steam-water mixing liquid is formed after pump mixing, the perforated pipe arranged in flotation area 6 is entered by corresponding pipeline and by-pass valve control, suddenly normal pressure is decompressed to, make supersaturated air in water in dispose procedure, form many micro-bubbles, carry part oil droplet and partial suspended solid, can first stick on the bubble of release, sedimentation buoyance lift be carried out in the disengaging zone 8 entered outside reaction tube with reaction tube water outlet; The material that negative area micro-bubble carries the medium and small oil droplet of water and fine suspension in floating-upward process floats to the water surface, forms scum silica frost, and reality is discharged through oil exit pipe 15 for foaming oil; Sewage after process enters next stage water outlet buffer zone 9, discharges finally by rising pipe 16.The top of this tank body is provided with vapor pipe 10, for discharging the gas in tank body, and perforation oil exit pipe, 15 for discharging in tank body the heating zone, buffer zone that intakes, electrostatic separation district, inclined plate sedimentation disengaging zone, the isolated oil slick in flotation area and water outlet buffer zone; Tank base is provided with the shore pipe 12 of perforation, is communicated with the spoil disposal header 17 outside tank, for regularly discharging the mud impurity produced bottom each district above-mentioned; Tank base and the position corresponding to each district are also provided with blow-off pipe 11 and are communicated with the blowdown header 18 outside tank, discharge the sewage bottom each district above-mentioned during for stopping production; Also being provided with in oil slick district by the hot water inlet pipe 13 that heats and return water pipe 14 in addition, for heating oil slick layer, guaranteeing that the oil slick produced is discharged smoothly, improve the treatment effect of oil, water, impurity sedimentation separation.
Claims (1)
1. an Electric-coagulationoil-water-sedimentatseparation oil-water-sedimentatseparation separation device, comprise horizontal tank body, be divided into into water heated buffer zone (3), electrostatic separation district (4), swash plate oil-removing area (5), air flotation zone (6), water outlet buffer zone (9) successively by dividing plate in tank body, described air flotation zone (6) is separated into again contact zone of dissolved air flotation (7) and flotation separation zone (8), it is characterized in that: described tank body top arranges vapor pipe (10), tank skin top arranges oil exit pipe (15), and the oil reservoir near oil exit pipe (15) arranges hot-water line (13) and return water pipe (14); In tank, bottom arranges perforated sludge discharge pipe (12), and be connected to spoil disposal header (17) by valve, and the pipe lower wall respectively corresponding to water inlet heated buffer zone (3), electrostatic separation district (4), swash plate oil-removing area (5), air flotation zone (6), water outlet buffer zone (9) arranges blow-off pipe (11), and be connected to blowdown header (18) by valve;
Liquid-inlet pipe (1) and well heater (2) is provided with in water inlet heated buffer zone (3) in described horizontal tank body; Rising pipe (16) is provided with in water outlet buffer zone (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310521673.7A CN103523982B (en) | 2013-10-29 | 2013-10-29 | Electric coagulation oil-water settling separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310521673.7A CN103523982B (en) | 2013-10-29 | 2013-10-29 | Electric coagulation oil-water settling separator |
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| Publication Number | Publication Date |
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| CN103523982A CN103523982A (en) | 2014-01-22 |
| CN103523982B true CN103523982B (en) | 2015-10-07 |
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| CN201310521673.7A Active CN103523982B (en) | 2013-10-29 | 2013-10-29 | Electric coagulation oil-water settling separator |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106890483A (en) * | 2017-04-13 | 2017-06-27 | 江苏江涛环境工程有限公司 | A kind of oil water separator and the method that water-oil separating is carried out using the oil water separator |
| CN109095641A (en) * | 2018-08-29 | 2018-12-28 | 中国海洋石油集团有限公司 | Drain processing unit is returned in a kind of acidification of offshore oilfield |
| CN110578510B (en) * | 2019-09-11 | 2023-12-05 | 中国石油天然气集团有限公司 | Three-phase separator system for gas well drainage process and use method |
| CN117699926B (en) * | 2024-02-02 | 2024-05-14 | 中国石油大学(华东) | Electromagnetic coupling copolymerization multi-stage air flotation oil removal device and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348317A (en) * | 2008-09-04 | 2009-01-21 | 江苏兴邦环保工程有限公司 | Mobile recoverable oil sludge oil sand processing unit |
| CN101486515A (en) * | 2009-02-17 | 2009-07-22 | 宜兴市芳惠子环保设备厂 | Oily wastewater treatment method and whole set apparatus thereof |
-
2013
- 2013-10-29 CN CN201310521673.7A patent/CN103523982B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348317A (en) * | 2008-09-04 | 2009-01-21 | 江苏兴邦环保工程有限公司 | Mobile recoverable oil sludge oil sand processing unit |
| CN101486515A (en) * | 2009-02-17 | 2009-07-22 | 宜兴市芳惠子环保设备厂 | Oily wastewater treatment method and whole set apparatus thereof |
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| CN103523982A (en) | 2014-01-22 |
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