CN211813884U - Advanced treatment device for oil extraction sewage in oil field - Google Patents
Advanced treatment device for oil extraction sewage in oil field Download PDFInfo
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- CN211813884U CN211813884U CN201922106786.6U CN201922106786U CN211813884U CN 211813884 U CN211813884 U CN 211813884U CN 201922106786 U CN201922106786 U CN 201922106786U CN 211813884 U CN211813884 U CN 211813884U
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- 239000010865 sewage Substances 0.000 title claims abstract description 17
- 238000000605 extraction Methods 0.000 title claims description 16
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000002351 wastewater Substances 0.000 claims description 20
- 239000010802 sludge Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 150000008430 aromatic amides Chemical class 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 18
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- 239000000084 colloidal system Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
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- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- HTXDPTMKBJXEOW-UHFFFAOYSA-N iridium(IV) oxide Inorganic materials O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 2
- 238000001471 micro-filtration Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
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- 238000010525 oxidative degradation reaction Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(IV) oxide Inorganic materials O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
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- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
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- 239000010779 crude oil Substances 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
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- 238000005188 flotation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
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- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to an oil field oil recovery sewage advanced treatment unit belongs to oil field oil recovery sewage treatment technical field. Oil field oil recovery sewage advanced treatment unit, the intake pump links to each other in proper order with electrochemical reactor, solid-liquid separator, circulation force (forcing) pump, precision filter, at least a set of anode plate and negative plate are arranged in parallel in the electrochemical reactor, the inside special membrane that is equipped with of precision filter, precision filter's bottom links to each other with electrochemical reactor's entry. The utility model has the advantages of scientific and reasonable design, simple and easy operation, the petroleum substance content in the effluent after the processing is less than 10mg/L, and the suspended solid content is less than 10mg/L, has reached "two 10" standards.
Description
Technical Field
The utility model relates to an oil field oil recovery sewage advanced treatment unit belongs to oil field oil recovery sewage treatment technical field.
Background
After the development of oil field is in the middle and later stages, the pressure of oil layer is greatly reduced, and water injection oil extraction is an important means for maintaining the pressure of oil layer. After the crude oil is dewatered, the water generally contains a certain amount of oil, sulfide, organic phenol, cyanogen, bacteria, solid particles, and chemical agents such as demulsifier, flocculant and bactericide. The discharge of a large amount of produced water causes environmental pollution and wastes valuable water resources. Therefore, the reinjection of the oil extraction sewage after treatment becomes an important way for reducing environmental pollution, ensuring the sustainable development of the oil field and improving the economic benefit of the oil field.
Suspended matters and oil in the sewage are two important factors causing the blockage of a water injection well and an oil layer in the reinjection of the oil extraction sewage, so the requirement on the two indexes in the reinjection requirement of the oil extraction sewage is more and more strict, and some areas provide double 10 standards (namely the content of petroleum substances is less than 10mg/L and the content of suspended matters is less than 10mg/L) for the reinjection water of the oil field at present.
After years of research, application and development, oil recovery water is first treated by an oil recovery three-phase separator at home and abroad according to the form of oil in the oil recovery wastewater, and then is subjected to advanced treatment by other processes and devices. The deep treatment mainly adopts the following treatment methods: oil separation treatment, air floatation, coagulation filtration, chemical treatment, biological treatment, adsorption and the like, but the method and the device have poor removal effect on soluble petroleum substances, so that the treated oil recovery water cannot reach the 'double 10' standard.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oil field oil recovery sewage advanced treatment unit, its design scientific and reasonable, simple and easy, the petroleum class material content is less than 10mg/L in the play water after the processing, and suspended solid content is less than 10mg/L, has reached "two 10" standards.
Oil field oil recovery sewage advanced treatment unit, the intake pump links to each other in proper order with electrochemical reactor, solid-liquid separator, circulation force (forcing) pump, precision filter, at least a set of anode plate and negative plate are arranged in parallel in the electrochemical reactor, the inside special membrane that is equipped with of precision filter, precision filter's bottom links to each other with electrochemical reactor's entry.
The electrochemical reactor is connected with a direct current power supply.
A separator clapboard is arranged at the middle upper part of the center of the solid-liquid separator.
And a scum discharge port is arranged on one side above the solid-liquid separator, and a sludge discharge port is arranged at the bottom of the solid-liquid separator.
At least one group of anodes and cathodes are arranged in parallel in the electrochemical reactor, the anodes and the cathodes are alternately arranged, the anodes are titanium-based coating electrodes, and the cathodes are nickel nets or titanium nets. The anode coating material in the electrochemical reactor is IrO2And RuO2A mixture of (a).
The distance between the anode and the cathode is 1-10cm, preferably 5 cm.
The support layer of the special film is diamond, and the coating is aromatic amide.
The current density of the electrode plate in the electrochemical reactor is 5-100mA/cm2And the water quality to be treated is manually or automatically adjusted.
The utility model discloses in, adopted electrochemical reactor, specifically to carrying out oxidative degradation to dissolubility petroleum class material in the waste water, carry out electrochemistry breakdown of emulsion destabilization to the aquatic emulsified oil simultaneously. The electrochemical demulsification is to utilize the migration power provided by a direct current electric field, the surface of emulsified oil or colloid in water is electrified, the emulsified oil or colloid reversely moves to the vicinity of an electrode under the action of the electric field to complete electric neutralization, and the emulsified oil or colloid quickly combines with the gas on the surface of a polar plate to float up large oil droplets along with the stirring of the gas, so that the demulsification process is completed; meanwhile, part of petroleum substances are oxidized and decomposed into carbon dioxide and water under the action of the anode surface catalyst, and the oxidative degradation process is completed. The utility model utilizes the oxidation of the anode to discharge the tiny oil droplets on the surface of the anode, lose electrons, reduce the negative charges on the surface, reduce the surface potential, oxidize and degrade the polymer fragments in the sewage, reduce the viscosity of the sewage and the strength of the water film on the oil-water interface, and enable the tiny oil droplets to be merged; meanwhile, the aim of removing oil from sewage is finally achieved by utilizing the air flotation effect of hydrogen generated by the cathode.
The utility model discloses well solid-liquid separator who adopts is used for carrying out mud-water separation to electrochemical reactor play water. The method comprises the steps that oil droplets and suspended matters with large volumes can be formed after destabilization of partial petroleum substances and suspended matters in wastewater after electrochemical demulsification oxidation, gravity precipitation or upward floating is carried out in a solid-liquid separator, upward floating sludge is collected by an overflow pipeline, a sludge discharge pipeline is arranged in a precipitation area for collection, and finally the overflow pipeline and the sludge discharge pipeline are converged and then discharged to a system.
The utility model discloses well microfiltration system who adopts, the effect is gone out water to solid-liquid separation and is carried out microfiltration. The filter material adopts a special ceramic coating film, and the surface coating has hydrophilic and oleophobic characteristics and can resist oil pollution; the filtration mode adopts circulating filtration, and the membrane concentrated solution flows back to the electrochemical reactor for circulating treatment.
Compared with the prior art, the utility model, following beneficial effect has:
(1) after the treatment of the utility model, the content of the petroleum substances and the content of suspended matters in the effluent can be less than 10mg/L at the same time;
(2) when the utility model is used, no chemical is needed to be added, and the operation is simple;
(3) when the utility model is used, the treatment depth is reached, the oil sludge yield is reduced, and the post-treatment cost is reduced;
(4) the utility model has the advantages of scientific and reasonable design, it is with low costs, the treatment effect is excellent.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in fig. 1: 1-a water inlet, 2-a water inlet pump, 3-an electrochemical reactor, 4-an anode plate, 5-a direct current power supply, 6-a cathode plate, 7-a communication pipeline, 8-a scum discharge port, 9-a separator partition plate, 10-a solid-liquid separator, 11-a circulating pressure pump, 12-a precision filter inlet, 13-a special membrane, 14-a precision filter, 15-a precision filter outlet, 16-a filtering backflow pipeline and 17-a sludge discharge port.
Detailed Description
The present invention is further described with reference to the following examples, which are not intended to limit the practice of the invention.
As shown in figure 1, in the advanced treatment device for the oil extraction wastewater in the oil field, a water inlet pump 2 is sequentially connected with an electrochemical reactor 3, a solid-liquid separator 10, a circulating pressure pump 11 and a precision filter 14, at least one group of anode plates 4 and cathode plates 6 are arranged in the electrochemical reactor 3 in parallel, a special membrane 13 is arranged in the precision filter 14, and the bottom of the precision filter 14 is connected with an inlet of the electrochemical reactor 3. The electrochemical reactor 3 is connected to a direct current power supply 5. A separator baffle plate 9 is arranged at the middle upper part of the solid-liquid separator 10. A scum outlet 8 is arranged on one side above the solid-liquid separator 10, and a sludge outlet 17 is arranged at the bottom of the solid-liquid separator 10.
The wastewater after the oil field oil extraction wastewater is treated by the three-phase separator enters an electrochemical reactor 3 from a water inlet 1 through a water inlet pump 2, a direct current is applied to an anode plate 4 and a cathode plate 6 by a direct current power supply 5, petroleum substances and colloids in the wastewater are demulsified under the action of an electric field between the anode plate 4 and the cathode plate 6, and part of the petroleum substances and colloids are oxidized and degraded on the surface of the anode plate 4; the waste water after demulsification and oxidation enters a solid-liquid separator 10 through a communication pipeline 7, floating slag floats upwards and is discharged out of the system from a floating slag discharge port 8 under the action of a separator partition plate 9, and suspended matters with larger volume are deposited to the bottom by gravity and are discharged from a sludge discharge port 17. The intermediate clear liquid is pressurized by a circulating pressure pump 11 and then enters a precision filter 14 from a precision filter inlet 12, and under the action of a special membrane 13 in the filter, clear water permeates the special membrane 13 and is discharged from a precision filter outlet 15; the rest wastewater entering the precision filter 14 is circulated from the filtration return line 16 to the front end of the electrochemical reactor 3 for treatment.
In the electrochemical reactor 3, two groups of anodes and cathodes are arranged in parallel and are alternately arranged, the anodes are titanium-based coating electrodes, and the cathodes are nickel nets. The anode coating material is IrO2And RuO2The mixture of (1) was mixed at a molar ratio of 1: 1.
The support layer of the special film is diamond, and the coating is aromatic amide. The aperture of the special membrane filter is 3 mu m.
Based on the above description, a specific embodiment will be described below by selecting typical industrial wastewater as a treatment target.
Example 1
Treating oil extraction wastewater of a certain oil field by a three-phase separator: the content of petroleum substances is 80mg/L, and the content of suspended substances is 120 mg/L.
After the wastewater is treated by the utility model, the content of oil substances in the effluent is 8mg/L, and the content of suspended matters is 5 mg/L.
Example 2
Treating oil extraction wastewater of a certain oil field by a three-phase separator: the content of petroleum substances is 150mg/L, and the content of suspended substances is 100 mg/L.
After the wastewater is treated by the utility model, the content of oil substances in the effluent is 5mg/L, and the content of suspended matters is 7 mg/L.
Example 3
Treating oil extraction wastewater of a certain oil field by a three-phase separator: the content of petroleum substances is 210mg/L, and the content of suspended matters is 135 mg/L.
After the wastewater is treated by the utility model, the content of oil substances in the effluent is 9mg/L, and the content of suspended matters is 8 mg/L.
Claims (6)
1. The utility model provides an oil field oil recovery sewage advanced treatment unit which characterized in that: the water inlet pump (2) is sequentially connected with the electrochemical reactor (3), the solid-liquid separator (10), the circulating pressure pump (11) and the precision filter (14), at least one group of anode plate (4) and cathode plate (6) are arranged in the electrochemical reactor (3) in parallel, a special membrane (13) is arranged inside the precision filter (14), and the bottom of the precision filter (14) is connected with an inlet of the electrochemical reactor (3).
2. The advanced treatment device for the oil field wastewater from oil extraction according to claim 1, which is characterized in that: the electrochemical reactor (3) is connected with a direct current power supply (5).
3. The advanced treatment device for the oil field wastewater from oil extraction according to claim 1, which is characterized in that: a separator clapboard (9) is arranged at the middle upper part of the solid-liquid separator (10).
4. The advanced treatment device for the oil field wastewater from oil extraction according to claim 1, which is characterized in that: a scum discharge opening (8) is arranged on one side above the solid-liquid separator (10).
5. The advanced treatment device for the oil field wastewater from oil extraction according to claim 1, which is characterized in that: the bottom of the solid-liquid separator (10) is provided with a sludge discharge port (17).
6. The advanced treatment device for the oil field wastewater from oil extraction according to claim 1, which is characterized in that: the support layer of the special film (13) is diamond, and the coating is aromatic amide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922106786.6U CN211813884U (en) | 2019-11-29 | 2019-11-29 | Advanced treatment device for oil extraction sewage in oil field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922106786.6U CN211813884U (en) | 2019-11-29 | 2019-11-29 | Advanced treatment device for oil extraction sewage in oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211813884U true CN211813884U (en) | 2020-10-30 |
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| CN201922106786.6U Active CN211813884U (en) | 2019-11-29 | 2019-11-29 | Advanced treatment device for oil extraction sewage in oil field |
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| CN (1) | CN211813884U (en) |
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- 2019-11-29 CN CN201922106786.6U patent/CN211813884U/en active Active
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