CN221440543U - Oil field sewage treatment device based on electric flocculation coupling - Google Patents
Oil field sewage treatment device based on electric flocculation coupling Download PDFInfo
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- CN221440543U CN221440543U CN202323261624.2U CN202323261624U CN221440543U CN 221440543 U CN221440543 U CN 221440543U CN 202323261624 U CN202323261624 U CN 202323261624U CN 221440543 U CN221440543 U CN 221440543U
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Abstract
The side wall of the mixing area is communicated with a sewage pump, a coagulant dosing device is arranged on an outlet pipeline of the sewage pump, the upper part of the mixing area is communicated with a coagulation area, the upper part of the coagulation area is communicated with a sewage treatment device, the sewage treatment device is sequentially divided into an electric flocculation air flotation area and a membrane separation area from left to right, a slag scraping machine is arranged at the upper part of the electric flocculation air flotation area, a dissolved air releaser is arranged at the lower part of the electric flocculation air flotation area, a dissolved air outlet and a purified water outlet are arranged at the upper part of the membrane separation area, the dissolved air outlet is communicated with an inlet of a dissolved air tank through a booster pump arranged on a pipeline, the other inlet of the dissolved air tank is communicated with an air compressor, an outlet of the dissolved air tank is communicated with a dissolved air releaser, and concentrated sewage at the bottom of the membrane separation area flows back to a water inlet of the electric flocculation air flotation area through a circulating pump arranged on the pipeline; the device overcomes the defect that the alum floc formed in the prior art is easy to smash and become small at the position close to the stirring rod, and improves the flocculation treatment effect.
Description
Technical Field
The utility model belongs to the technical field of water treatment devices or equipment, and particularly relates to an oil field sewage treatment device based on electric flocculation coupling.
Background
The production sewage of enterprises such as petroleum, chemical industry, chemical fertilizer, electric power, printing and dyeing industry and the like can be discharged or recycled after reaching the standard. During oil extraction production, petroleum enterprises produce a large amount of sewage, and the sewage is treated to reach the standard and then is reinjected into the stratum to recover the stratum energy so as to achieve the effect of increasing the yield. Flocculation, air floatation and filtration are common technological methods in the sewage purification treatment process. The coagulation air-float process is to add coagulant into sewage to perform flocculation reaction with insoluble matter in water to form large alum blossom, and then to adhere the alum blossom to the surface of the air bubble to be separated from the water surface by the tiny air bubble generated by the air-float process, so as to achieve the aim of purifying water quality.
In the use process of the existing oilfield sewage treatment purification device, the chemical agent adding amount is large, the continuous stirring of large stirring equipment is used for achieving the full mixing of the chemical agent and sewage and promoting the flocculation reaction process when the coagulant is added, the application of the large stirring equipment not only increases the power consumption of sewage treatment, but also causes the non-uniform flocculation reaction degree of different areas in the sewage due to the non-uniformity of stirring, and the formed floc alum is crushed and reduced at the position close to the stirring rod, so that the flocculation treatment effect is reduced, and the purification of sewage is affected. And the air floatation effect is poor, and the water quality of purified water has large variation range and the like.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing the electric flocculation coupling-based oilfield sewage treatment device which has the advantages of reasonable design, simple structure, good flocculation effect and high water quality purification rate.
The technical scheme adopted for solving the technical problems is as follows: the side wall of the mixing zone is communicated with an outlet of a sewage pump, the sewage pump is communicated with a mixing zone communicating pipe, a coagulant dosing device is arranged on the upper part of the mixing zone and is communicated with a coagulation zone, the upper part of the coagulation zone is communicated with a sewage treatment device, the sewage treatment device is sequentially divided into an electric flocculation air flotation zone and a membrane separation zone from left to right, a slag discharging port is arranged at the bottom of the electric flocculation air flotation zone and the membrane separation zone, a slag scraping machine is arranged at the upper part of the electric flocculation air flotation zone, a dissolved air releaser is arranged at the lower part of the electric flocculation air flotation zone, a dissolved air outlet and a purified water outlet are arranged at the upper part of the membrane separation zone, the dissolved air outlet is communicated with an inlet of a dissolved air tank through a booster pump arranged on a pipeline, the other inlet of the dissolved air tank is communicated with an air compressor, the outlet of the dissolved air tank is communicated with the dissolved air releaser, and concentrated sewage at the bottom of the membrane separation zone is refluxed to a water inlet of the electric flocculation air flotation zone through a circulating pump arranged on the pipeline;
A plurality of groups of trapezoidal baffle plates are vertically arranged in the coagulation zone at intervals, and the wave crests of the adjacent trapezoidal baffle plates are opposite to the wave crests and the wave troughs are opposite to the wave troughs.
The electric flocculation air flotation area is internally provided with electrode plate groups, each electrode plate group consists of a plurality of groups of anode plates and cathode plates, and the anode plates and the cathode plates are equal in number, are mutually staggered and are perpendicular to the horizontal plane of the bottom of the tank.
The electrode plate group of the present utility model is located directly above the dissolved gas releaser.
The membrane separation area is internally provided with a membrane component which is a hollow fiber microfiltration membrane component.
A separation plate is arranged between a membrane separation area and an electric flocculation air floatation area.
The concentration sewage at the bottom of the membrane separation zone is 0.01 to 0.1 time of the water inflow of the sewage inlet of the electric flocculation air flotation zone.
The distance from the coagulant dosing device to the mixing zone is less than 1m.
The slag discharge port of the utility model has an inverted cone structure.
The trapezoid baffle plate is made of oleophilic and hydrophobic coalesced materials.
Compared with the prior art, the utility model has the following advantages:
The utility model adopts the arrangement of the coagulation area above the mixing area, the coagulation area is internally provided with the trapezoid baffle plate, the design ensures that the coagulation reaction of the medicament and the sewage is more uniform, the probability of collision of flocs is increased by the change of the flow speed and the flow direction of the sewage in the trapezoid baffle plate, the probability of forming large flocs by the growth of small flocs is increased, the flow speed and the flow direction change of the sewage in the trapezoid baffle plate are gentle, the crushing influence of the mechanical stirring process on the forming flocs is effectively avoided, meanwhile, the sewage treatment device is sequentially divided into an electric flocculation air flotation area and a membrane separation area from left to right through the partition plate, the upper part of the electric flocculation air flotation area is provided with a slag scraper, the lower part of the electric flocculation air flotation area is provided with a dissolved air releaser, the air dissolved in the water is released from the water through the releaser to form small micro bubbles, the flocs in the water are adhered on the surface of the bubbles, and the flocs float up to the liquid surface along with the bubbles, and are removed by the slag scraper, and the water quality is purified; the middle part of the electric flocculation air-floating zone is provided with an electrode plate group, various hydroxyl complexes generated near the anode of the electrode plate group can also coagulate colloidal matters and suspended matters in water, the flocculation effect is enhanced, very tiny bubbles separated out from the surface of the cathode and anode of the electrode plate group have good capability of capturing suspended impurities, and the air-floating effect is enhanced. Meanwhile, the chlorine generated by the electrode plate group has a certain killing effect on sulfate reducing bacteria, saprophytic bacteria and iron bacteria in the oilfield sewage. The membrane separation area is internally provided with a membrane component, the hollow fiber microfiltration membrane component belongs to a fine filter, fine insoluble suspended particles in water are trapped through fine filtration of membrane holes, the water quality of the treated water is improved, the influence of the fluctuation of the treatment effect of the air flotation area on the water quality of the discharged water can be stabilized, and concentrated sewage at the bottom of the membrane separation area flows back to the water inlet of the electric flocculation air flotation area through a circulating pump arranged on a pipeline; the total reflux of the concentrated water not only reduces the amount of the concentrated sludge, but also is beneficial to the aggregation of the suspended matters of the sewage on the flocs, thereby enhancing the flocculation effect of the suspended matters.
Drawings
Fig. 1 is a schematic diagram of the structure of an embodiment of the present utility model.
In the figure: 1. a sewage pump; 2. a mixing zone; 3. a coagulation zone; 4. a trapezoidal baffle; 5. a slag scraping machine; 6. an electric flocculation air floatation area; 7. a membrane separation zone; 8. a membrane module; 9. a booster pump; 10. a circulation pump; 11. an air compressor; 12. a dissolved air tank; 13. a slag discharge port; 14. a partition plate; 15. a dissolved air releaser; 16. electrode plate group.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, but the present utility model is not limited to these examples.
Example 1
In fig. 1, the utility model relates to an electric flocculation coupling-based oilfield sewage treatment device, the side wall of a mixing zone 2 is communicated with the outlet of a sewage pump 1, a coagulant dosing device is arranged on the communicating pipe of the sewage pump 1 and the mixing zone 2, coagulant and sewage are uniformly mixed in the mixing zone 1, and specifically, the distance from the coagulant dosing device to the mixing zone 2 is smaller than 1m. The upper portion of mixing district 1 is linked together with coagulation district 3, the inside vertical interval in coagulation district 3 of this embodiment is provided with a plurality of trapezoidal baffling boards 4, the crest and the crest of adjacent trapezoidal baffling board 4 are relative, the trough is relative with the trough, trapezoidal baffling board 4 is made by oleophilic hydrophobic coalescence material, sewage passes through from the clearance of adjacent trapezoidal baffling board 4, this design makes the coagulation reaction of medicament and sewage more even, the change of velocity of flow and flow direction of sewage has increased the chance that the little floc grows into big floc in trapezoidal baffling board 4, velocity of flow and flow direction change slow down in trapezoidal baffling board 4, effectively avoided the broken influence of mechanical stirring process to forming the floc, compared with the wave baffling board, the intensity of change of flow direction of sewage in trapezoidal baffling board 4 is greater than the intensity of change of flow direction in the wave baffling board, increase the chance that little floc granule collides each other, be favorable to the coalescence of floc to growing up.
The upper portion of coagulation zone 3 is linked together with sewage treatment plant, and sewage treatment plant divide into electric flocculation air supporting district 6, membrane separation district 7 from left to right in proper order, is provided with division board 14 between membrane separation district 7 and the electric flocculation air supporting district 6, and division board 14 is favorable to the great insoluble substance of density to deposit in flocculation air supporting district 6 to get rid of, reduces insoluble substance and gets into membrane separation district 7, lightens the processing load of membrane module 8, improves the treatment effeciency of membrane module 8. The bottom of the electric flocculation air flotation zone 6 and the bottom of the membrane separation zone 7 are provided with slag discharge openings 13, further, the slag discharge openings 13 are of an inverted cone structure, the upper part of the electric flocculation air flotation zone 6 is provided with a slag scraping machine 5, the lower part of the electric flocculation air flotation zone is provided with a dissolved air releaser 15, suspended matters floating on the water surface are scraped to a slag groove for discharge through the reciprocating motion of the slag scraping machine 5, the purpose of water quality purification is achieved, an electrode plate group 16 is arranged in the electric flocculation air flotation zone 6, and the electrode plate group 16 is positioned right above the dissolved air releaser 15. The electrode plate group 16 is composed of a plurality of anode plates and cathode plates which are equal in number, staggered with each other and perpendicular to the horizontal plane of the bottom of the tank.
The membrane component 8 is arranged in the membrane separation zone 7 of the embodiment, the membrane component 8 is a hollow fiber microfiltration membrane component, the hollow fiber microfiltration membrane component belongs to a fine filter, fine insoluble suspended particles in water are trapped through fine filtration of membrane holes, the water quality of the treated water is improved, and the influence of fluctuation of the treatment effect of an air floatation zone on the water quality of the discharged water can be stabilized. The upper part of the membrane separation zone 7 is provided with a dissolved air outlet and a purified water outlet, the dissolved air outlet is communicated with one inlet of a dissolved air tank 12 through a booster pump 9 arranged on a pipeline, the other inlet of the dissolved air tank 12 is communicated with an air compressor 11, the outlet of the dissolved air tank is communicated with a dissolved air releaser 14, the air compressor 11 compresses air into water, pressurized dissolved air water is formed in the dissolved air tank 12, the dissolved air tank 12 is communicated with the dissolved air releaser 14 through a pipeline, the pressurized dissolved air water in the dissolved air tank 12 is depressurized through the dissolved air releaser 14 to release a large number of micro-bubbles, the micro-bubbles carry floc suspended matters in water to an electrode plate group 16 in the rising process, various hydroxyl complexes generated near the anode of the electrode plate group 16 enable colloidal matters and suspended matters in the water to be condensed, the flocculation effect is enhanced, and very tiny bubbles separated out from the surface of the cathode and anode of the electrode plate group 16 have very good capability of capturing suspended impurities, and the air floating effect is enhanced. Meanwhile, the chlorine generated by the electrode plate group 16 has a certain killing effect on sulfate reducing bacteria, saprophytic bacteria and iron bacteria in the oilfield sewage. The floc suspended matters passing through the electrode plate group 16 float on the water surface, the slag of the floc suspended matters is scraped to a slag groove by a slag scraper 5, the water quality is purified, and the sewage treatment efficiency is improved.
The concentrated sewage at the bottom of the membrane separation zone 7 flows back to the water inlet of the electric flocculation air floatation zone 6 through a circulating pump 10 arranged on a pipeline; the total reflux of the concentrated water not only reduces the amount of the concentrated sludge, but also is beneficial to the aggregation of the suspended matters of the sewage on the flocs, thereby enhancing the flocculation effect of the suspended matters. Specifically, the concentration sewage at the bottom of the membrane separation zone 7 is 0.01-0.1 times of the water inflow of the sewage inlet of the electric flocculation air flotation zone 6.
Claims (9)
1. Based on electric flocculation coupling oil field sewage treatment plant, the lateral wall and the sewage pump (1) export of mixing district (2) are linked together, are provided with coagulant charge device on sewage pump (1) and mixing district (2) communicating pipe line, and the upper portion and the coagulation zone (3) of mixing district (2) are linked together, its characterized in that: the upper part of the coagulation zone (3) is communicated with a sewage treatment device, the sewage treatment device is sequentially divided into an electric flocculation air flotation zone (6) and a membrane separation zone (7) from left to right, a slag discharging port (13) is formed in the bottoms of the electric flocculation air flotation zone (6) and the membrane separation zone (7), a slag scraping machine (5) is arranged at the upper part of the electric flocculation air flotation zone (6), a dissolved air releaser (15) is arranged at the lower part of the electric flocculation air flotation zone, a dissolved air outlet and a purified water outlet are arranged at the upper part of the membrane separation zone (7), the dissolved air outlet is communicated with an inlet of a dissolved air tank (12) through a booster pump (9) arranged on a pipeline, the other inlet of the dissolved air tank (12) is communicated with an air compressor (11), an outlet of the dissolved air tank is communicated with the dissolved air releaser (15), and concentrated sewage at the bottom of the membrane separation zone (7) flows back to a water inlet of the electric flocculation air flotation zone (6) through a circulating pump (10) arranged on a pipeline;
A plurality of groups of trapezoidal baffle plates (4) are vertically arranged in the coagulation zone (3) at intervals, and the wave crests of the adjacent trapezoidal baffle plates (4) are opposite to the wave crests and the wave troughs are opposite to the wave troughs.
2. An electric flocculation coupling-based oilfield sewage treatment device according to claim 1, wherein: the electric flocculation air flotation zone (6) is internally provided with an electrode plate group (16), the electrode plate group (16) is composed of a plurality of groups of anode plates and cathode plates, and the anode plates and the cathode plates are equal in number, are mutually staggered and are perpendicular to the horizontal plane of the pool bottom.
3. An electric flocculation coupling-based oilfield sewage treatment device as set forth in claim 2, wherein: the electrode plate group (16) is positioned right above the dissolved gas releaser (15).
4. An electric flocculation coupling-based oilfield sewage treatment device according to claim 1, wherein: a membrane component (8) is arranged in the membrane separation zone (7), and the membrane component (8) is a hollow fiber microfiltration membrane component.
5. An electric flocculation coupling-based oilfield sewage treatment device according to claim 1, wherein: a separation plate (14) is arranged between the membrane separation area (7) and the electric flocculation air floatation area (6).
6. An electric flocculation coupling-based oilfield sewage treatment device according to claim 1, wherein: the concentration sewage at the bottom of the membrane separation zone (7) is 0.01-0.1 times of the water inflow of the sewage inlet of the electric flocculation air flotation zone (6).
7. An electric flocculation coupling-based oilfield sewage treatment device according to claim 1, wherein: the distance from the coagulant dosing device to the mixing zone (2) is less than 1m.
8. An electric flocculation coupling-based oilfield sewage treatment device according to claim 1, wherein: the slag discharging opening (13) is of an inverted cone structure.
9. An electric flocculation coupling-based oilfield sewage treatment device according to claim 1, wherein: the trapezoid baffle plate (4) is made of oleophilic and hydrophobic coalesced materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323261624.2U CN221440543U (en) | 2023-11-30 | 2023-11-30 | Oil field sewage treatment device based on electric flocculation coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323261624.2U CN221440543U (en) | 2023-11-30 | 2023-11-30 | Oil field sewage treatment device based on electric flocculation coupling |
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| Publication Number | Publication Date |
|---|---|
| CN221440543U true CN221440543U (en) | 2024-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323261624.2U Active CN221440543U (en) | 2023-11-30 | 2023-11-30 | Oil field sewage treatment device based on electric flocculation coupling |
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| CN (1) | CN221440543U (en) |
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2023
- 2023-11-30 CN CN202323261624.2U patent/CN221440543U/en active Active
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