CN111072190A - Electrocatalytic oxidation and air flotation coalescence treatment process method and equipment for oil-containing sewage - Google Patents
Electrocatalytic oxidation and air flotation coalescence treatment process method and equipment for oil-containing sewage Download PDFInfo
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- CN111072190A CN111072190A CN202010004947.5A CN202010004947A CN111072190A CN 111072190 A CN111072190 A CN 111072190A CN 202010004947 A CN202010004947 A CN 202010004947A CN 111072190 A CN111072190 A CN 111072190A
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- 238000004581 coalescence Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000003647 oxidation Effects 0.000 title claims abstract description 31
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 30
- 239000010865 sewage Substances 0.000 title claims abstract description 23
- 238000005188 flotation Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 238000006056 electrooxidation reaction Methods 0.000 claims abstract description 25
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 22
- 230000002776 aggregation Effects 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims description 24
- 239000002253 acid Substances 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 239000002893 slag Substances 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 238000005054 agglomeration Methods 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims 2
- 238000004891 communication Methods 0.000 claims 1
- 238000004220 aggregation Methods 0.000 abstract description 12
- 229920000642 polymer Polymers 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
- C02F2001/46138—Electrodes comprising a substrate and a coating
- C02F2001/46142—Catalytic coating
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention relates to a process method and equipment for electrocatalytic oxidation and air flotation coalescence treatment of oil-containing sewage. Wherein, an oil skimming cap, an oleophylic aggregation layer, a parallel electro-catalytic polar plate and a parallel electro-oxidation polar plate are sequentially arranged in the dirty oil-water separator tower body from top to bottom. The oil-containing sewage water enters a sewage water separator tower body and sequentially passes through an oleophylic aggregation layer, a parallel electro-catalytic polar plate and a parallel electro-oxidation polar plate and finally reaches the bottom. When oil containing dirty oil passes through the oleophylic coalescence layer, oil particles are adsorbed by the oleophylic coalescence layer, the parallel electro-catalysis polar plate and the parallel electro-oxidation polar plate can generate electrolytic reaction under the power-on condition and generate a large amount of bubbles, the bubbles can take the adsorbed oil particles out of the oleophylic coalescence layer to float upwards, and the bubbles and the oil particles are finally discharged through the oil skimming cap. The electrolytic reaction generated in the parallel electro-oxidation polar plate has strong oxidation effect, and the electrolytic reaction generated in the parallel electro-catalysis polar plate has catalysis effect, so that the strong oxidation effect is enhanced, and the high molecular polymer in the polymer-containing sewage can be degraded. Therefore, under the combined action of electrocatalytic oxidation, air flotation and coalescence, the treatment effect of the oil-containing polluted water is very obvious.
Description
Technical Field
The invention belongs to the technical field of dirty oil water treatment, and particularly relates to a process method and equipment for electrocatalytic oxidation and air flotation coalescence of dirty oil-containing water.
Background
As the oil content of an oil field decreases, polymer flooding is the most common enhanced recovery measure for oil fields in order to increase recovery efficiency, and is accompanied by the production of a large amount of polymer-containing dirty oil water. The treatment of contaminated oil-containing water is very difficult and there are few very effective treatment processes available today.
The invention combines the electrocatalytic oxidation sewage treatment technology with the coalescence water treatment technology, designs an electrocatalytic oxidation air flotation coalescence polymer-containing waste oil water treatment process method and corresponding equipment, and can greatly improve the treatment effect of the polymer-containing waste oil water in the oil field.
Disclosure of Invention
The invention designs an electrocatalytic oxidation air floatation coalescence waste oil water treatment device by combining an electrocatalytic oxidation sewage treatment technology and a coalescence water treatment technology by utilizing the process principles of electrocatalytic oxidation and coalescence, and can greatly improve the treatment effect of oil field polymerization waste oil water under the combined action of electrocatalytic oxidation, air floatation and coalescence. The invention achieves the above purpose by the following technical scheme:
a process and equipment for electrocatalytic oxidation and air flotation coalescence treatment of oil-containing sewage comprises a sewage water separator tower body, a water inlet, an oleophylic coalescence layer, a first anode terminal, a second anode terminal, a first cathode terminal, a second cathode terminal, a parallel electrocatalytic polar plate, a parallel electrooxidation polar plate, an oil skimming cap, a water outlet buffer tank and a water outlet. Wherein, oil skimming cap, oleophylic coalescence layer, parallel electro-catalysis polar plate and parallel electro-oxidation polar plate have set gradually from top to bottom in dirty oil water separator tower body, and the water inlet is located oleophylic coalescence layer top and oil skimming cap below, and water reaches dirty oil water separator tower body bottom through oleophylic coalescence layer, parallel electro-catalysis polar plate and parallel electro-oxidation polar plate in proper order, goes out water buffer tank and dirty oil water separator tower body bottom intercommunication, and the outlet port is located a water buffer tank bottom.
The electrocatalytic oxidation and air flotation coalescence treatment process method and equipment for the oil-containing sewage further comprise a gas-residue separation device, an acid gas absorption device and an oil-residue collection device, wherein the gas-residue separation device is communicated with the oil skimming cap, the acid gas absorption device is communicated with the top of the gas-residue separation device, and the oil-residue collection device is communicated with the bottom of the gas-residue separation device.
The further technical scheme of the invention also comprises:
the water inlet enters the sump oil water separator tower body in a tangential mode.
The oil skimming cap is positioned at the center of the top of the dirty oil-water separator tower body.
The distance between the oleophylic aggregation layer and the top of the parallel electrocatalysis polar plate is not less than 20 cm.
The thickness of the oleophylic aggregation layer is not less than 10 centimeters, the specific surface area is not less than 200, and the gap between the periphery of the oleophylic aggregation layer and the tower body of the dirty oil-water separator is less than 5 millimeters.
All cathode plates of the parallel electrocatalytic electrode plates are connected with a first cathode binding post, and all anode plates are connected with a first anode binding post. The first cathode binding post and the first anode binding post are externally connected with a cathode and an anode of a direct current power supply. All anode plates adopt platinum plating coatings.
And all cathode plates of the parallel electro-oxidation polar plates are connected with a second cathode binding post, and all anode plates are connected with a second anode binding post. And the second cathode wiring terminal and the second anode wiring terminal are externally connected with a cathode and an anode of a direct-current power supply. All anode plates adopt lead dioxide plated coatings.
The vertical tangent of all the polar plate planes of the parallel electro-catalysis polar plate and the parallel electro-oxidation polar plate is consistent with the water flow direction.
The water inlet position of the water outlet buffer tank is at least 20 cm higher than the bottom of the oil skimming cap.
At present, a process technology for treating the oil-containing sewage water by combining several water treatment processes of electrocatalytic oxidation, air flotation and coalescence does not exist, and the invention has the beneficial technical effects that: under the combined action of electrocatalytic oxidation, air flotation and coalescence, the treatment effect of the oil field containing the oil-contaminated water is greatly improved.
Drawings
FIG. 1 is a schematic view of the present invention relating to a process and apparatus for electrocatalytic oxidation and air flotation coalescence of oil-containing contaminated water. Wherein:
1. the device comprises a water inlet 2, an oleophylic agglomeration layer 3, a first anode terminal 4, a parallel electro-catalytic polar plate 5, a first cathode terminal 6, an oil skimming cap 7, a gas-residue separation device 8, an acid gas absorption device 9, an oil residue collection device 10, a water outlet buffer tank 11, a water outlet 12, a second anode terminal 13, a parallel electro-oxidation polar plate 14, a second cathode terminal 15 and a dirty oil-water separator tower body.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1, the present invention relates to a process and an apparatus for electrocatalytic oxidation and air flotation coalescence treatment of oil-containing sewage, which comprises a sewage-oil separator tower body 15, a water inlet 1, an oleophilic coalescence layer 2, a first anode terminal 3, a second anode terminal 12, a first cathode terminal 5, a second cathode terminal 14, a parallel electrocatalytic electrode plate 4, a parallel electrooxidation electrode plate 13, an oil skimming cap 6, a water outlet buffer tank 10, and a water outlet 11. Wherein, an oil skimming cap 6, an oleophylic agglomeration layer 2, a parallel electro-catalysis electrode plate 4 and a parallel electro-oxidation electrode plate 13 are sequentially arranged in the dirty oil-water separator tower body 15 from top to bottom, a water inlet 1 is positioned above the oleophylic agglomeration layer 2 and below the oil skimming cap 6, the water sequentially passes through the oleophylic agglomeration layer 2, the parallel electro-catalysis electrode plate 4 and the parallel electro-oxidation electrode plate 13 and finally reaches the bottom of the dirty oil-water separator tower body 15, a water outlet buffer tank 10 is communicated with the bottom of the dirty oil-water separator tower body 15, and a water outlet 11 is positioned at the bottom of the water outlet buffer tank 10.
The electrocatalytic oxidation and air flotation coalescence treatment process method and equipment for the oil-containing sewage further comprise a gas-residue separation device 7, an acid gas absorption device 8 and an oil-residue collection device 9, wherein the gas-residue separation device 7 is communicated with the oil skimming cap 6, the acid gas absorption device 8 is communicated with the top of the gas-residue separation device 7, and the oil-residue collection device 9 is communicated with the bottom of the gas-residue separation device 7.
In one embodiment of the invention, a water inlet 1 enters the sump oil-water separator tower body 15 in a tangent mode, an oil skimming cap 6 is positioned at the center of the top of the sump oil-water separator tower body 15, the distance between an oleophylic aggregation layer 2 and the top of a parallel electro-catalytic polar plate 4 is not less than 20 centimeters, the stacking thickness of the oleophylic aggregation layer 2 is not less than 10 centimeters, the specific surface area is not less than 200, the gap between the periphery of the oleophylic aggregation layer 2 and the sump oil-water separator tower body 12 is less than 5 millimeters, the vertical tangent of all polar plate planes of the parallel electro-catalytic polar plate 4 and a parallel electro-oxidative polar plate 13 is consistent with the water flow direction, wherein all cathode plates of the parallel electro-catalytic polar plate 4 are connected with a first cathode binding post 5, all anode plates are connected with a first anode binding post 3, the first cathode binding post 5 and the first anode binding post 3 are externally connected with a DC power, all anode plates are connected to a second anode terminal 12. The second cathode binding post 14 and the second anode binding post 12 are externally connected with a cathode and an anode of a direct current power supply, and the water inlet position of the water outlet buffer tank 10 is at least 20 cm higher than the bottom of the oil skimming cap 6.
The invention also provides a process method for treating the oil-containing sewage water, which comprises the following steps:
a coalescence step: after the oil-containing sewage water to be treated enters the sewage water separator tower body 15, oil particles in the water are adsorbed by the oleophylic aggregation layer 2 and are aggregated in the oleophylic aggregation layer 2;
an oxidation step: part of the coalesced oil-containing sewage sinks, passes through the parallel electrooxidation polar plate 13, and the parallel electrooxidation polar plate 13 is electrified to generate an electrolytic reaction, so that the water to be treated is strongly oxidized;
air floatation: the electrolytic reaction of the parallel electro-oxidation electrode plate 13 generates a large amount of bubbles, and the bubbles pass through the oleophylic agglomeration layer 2 to carry out oil particles which are discharged through the oil skimming cap 6.
Further, the method also comprises a catalysis step, wherein the catalysis step is carried out after the oxidation step or is carried out synchronously with the oxidation step, and the catalysis step specifically comprises the following steps:
the oxidized water to be treated further sinks and passes through the parallel electro-catalysis polar plate 4, and the parallel electro-catalysis polar plate 4 is electrified to generate an electrolytic reaction which has a catalytic action.
The process method of the invention also comprises the following steps: a gas-slag separation step, an acid gas absorption step and an oil-slag collection step,
the air bubbles and oil particles discharged from the oil skimming cap 6 form an oil residue and gas mixture, and the mixture enters a gas residue separation device 7 for gas residue separation;
gas enters an acid gas absorption device 8 from the top of the gas-slag separation device 7;
the oil residue enters the oil residue collecting device 9 from the bottom of the gas-residue separating device 7.
Specifically, the polymer-containing dirty oil water enters the dirty oil-water separator tower body 15 through the water inlet 1 tangent to form a rotational flow, and under the action of weak centrifugal force, light parts can be concentrated in the central area of the dirty oil-water separator tower body 15. When the water flow flows downwards and passes through the oleophilic aggregation layer 2, the oil particles are adsorbed by the oleophilic surface of the oleophilic aggregation layer 2. Meanwhile, the parallel electro-catalytic electrode plate 4 and the parallel electro-oxidation electrode plate 13 can generate electrolytic reaction and generate a large amount of bubbles under the power-on condition, wherein a large amount of hydrogen bubbles can be generated on the surface of the cathode plate, a large amount of oxygen or acid bubbles can be generated on the surface of the anode plate, the bubbles can collect oil particles in water in the rising process and can also take out and float the adsorbed oil particles when passing through the oleophylic agglomeration layer 2, the bubbles and the collected oil particles are discharged into the gas-slag separation device 7 through the oil skimming cap 6 under the cyclone effect, oil slag enters the oil-slag collection device 9 from the bottom of the gas-slag separation device 7, gas enters the acid gas absorption device 8 from the top of the gas-slag separation device 7, and acid gas generated by the anode plate can be absorbed by alkali liquor in the acid gas absorption device 8, so that the acid gas is prevented from being discharged to pollute.
In addition, the anode of the parallel electro-oxidation electrode plate 13 is plated with a lead dioxide coating, so that high oxidation potential can be obtained, strong oxidants such as oxygen, chlorine, ozone, hydroxyl radicals and the like can be generated by electrolysis, and the anode of the parallel electro-catalysis electrode plate 4 is plated with a platinum coating, so that the platinum coating has strong pollution resistance, and oxidizing gases such as oxygen, chlorine and the like can be generated in the electrolysis process. When the strong oxidant generated by the electrolysis of the parallel electro-oxidation polar plate 13 passes through the parallel electro-catalysis polar plate 4, the electrochemical reaction is promoted under the action of the electric field of the parallel electro-catalysis polar plate 4, so that the forced oxidation effect is achieved, and the high molecular polymer can be degraded. Therefore, under the combined action of electrocatalytic oxidation, air flotation and coalescence, the treatment effect of the oil-containing sewage water is obviously improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. Any modification, equivalent replacement, and improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. The utility model provides a contain dirty profit electrocatalytic oxidation air supporting coalescence processing apparatus, including dirty profit separator tower body, the water inlet, oleophylic coalescence layer, parallel electro-catalysis polar plate, parallel electro-oxidation polar plate, oil skimming cap, the effluent buffer tank, the outlet, a serial communication port, oil skimming cap has set gradually from top to bottom in dirty profit separator tower body, oleophylic coalescence layer, parallel electro-catalysis polar plate, parallel electro-oxidation polar plate, the water inlet is located oleophylic coalescence layer top and oil skimming cap below, water passes through oleophylic coalescence layer in proper order, parallel electro-catalysis polar plate, parallel electro-oxidation pole reaches dirty profit separator tower body bottom, the outlet buffer tank communicates with dirty profit separator tower body bottom, the outlet is located outlet buffer tank bottom.
2. The electrocatalytic oxidation and floating coalescence treatment process equipment for the oil containing contaminated water as claimed in claim 1, further comprising a gas-residue separation device, an acid gas absorption device and an oil-residue collection device, wherein the gas-residue separation device is communicated with the oil skimming cap, the acid gas absorption device is communicated with the top of the gas-residue separation device, and the oil-residue collection device is communicated with the bottom of the gas-residue separation device.
3. The process equipment for electrocatalytic oxidation-flotation-coalescence treatment of the oil-containing contaminated water according to claim 1, wherein the water inlet enters the contaminated water separator tower tangentially.
4. The electrocatalytic oxidation, flotation and coalescence treatment process equipment for the oil-containing wastewater as claimed in claim 1, wherein the oil skimming cap is positioned at the center of the top of the wastewater water separator tower body.
5. The electrocatalytic oxidation-flotation-coalescence-treatment process equipment for the oil-containing sewage as claimed in claim 1, wherein the specific surface area of the oleophylic coalescence layer is not less than 200, the stack thickness is not less than 10 cm, and the gap between the periphery of the oleophylic coalescence layer and the tower body of the sewage-oil separator is less than 5 mm.
6. The electrocatalytic oxidation-flotation-coalescence-treatment process equipment for the oil containing the polluted oil as claimed in claim 1 or 5, wherein the distance between the oleophilic coalescence layer and the top of the parallel electrocatalytic electrode plate is not less than 20 cm.
7. The electrocatalytic oxidation-flotation-coalescence-treatment process equipment for the oil containing contaminated water as claimed in claim 1, wherein all cathode plates of the parallel electrocatalytic electrode plates are connected with a first cathode terminal, all anode plates are connected with a first anode terminal, the first cathode terminal and the first anode terminal are externally connected with a cathode and an anode of a direct current power supply, and all anode plates are coated with a platinum coating.
8. The electrocatalytic oxidation-flotation-coalescence-treatment process equipment for the oil containing contaminated water as claimed in claim 1, wherein all cathode plates of the parallel electro-oxidation polar plates are connected with a second cathode terminal, all anode plates are connected with a second anode terminal, the second cathode terminal and the second anode terminal are externally connected with a cathode and an anode of a direct current power supply, and all anode plates are coated with a lead dioxide coating.
9. The electrocatalytic oxidation-flotation coalescence treatment process equipment for the oil-containing contaminated water according to claim 1 or 7, wherein the perpendicular tangents of all the plate planes of the parallel electrocatalytic plate and the parallel electrocatalytic plate are consistent with the water flow direction.
10. The electrocatalytic oxidation-flotation-coalescence-treatment process equipment for the oil containing dirty oil as claimed in claim 1, wherein the water inlet position of the water outlet buffer tank is at least 20 cm higher than the bottom of the oil skimming cap.
11. A process for treating a contaminated oil-containing water using an apparatus according to any of claims 1 to 10, comprising the steps of:
a coalescence step: after the oil-containing sewage water to be treated enters the sewage water separator tower body, oil particles in the water are adsorbed by the oleophylic coalescence layer and are coalesced in the oleophylic coalescence layer;
an oxidation step: part of the coalesced oil-containing sewage sinks, passes through the parallel electro-oxidation polar plates, and is electrified to generate electrolytic reaction, so that the water to be treated is strongly oxidized;
air floatation: the electrolytic reaction of the parallel electro-oxidation polar plate generates a large amount of bubbles, and the bubbles pass through the oleophylic agglomeration layer to carry out oil particles which are discharged through the oil skimming cap.
12. The process according to claim 11, further comprising a catalytic step, carried out after or simultaneously with the oxidation step, in particular:
the oxidized water to be treated further sinks and passes through the parallel electro-catalysis polar plate, and the electrolytic reaction is generated after the parallel electro-catalysis polar plate is electrified, and the electrolytic reaction has a catalysis effect.
13. The process of claim 11 or 12, further comprising: a gas-slag separation step, an acid gas absorption step and an oil-slag collection step,
the air bubbles and oil particles discharged by the oil skimming cap form an oil residue and gas mixture, and the mixture enters a gas residue separation device for gas residue separation;
gas enters the acid gas absorption device from the top of the gas-slag separation device;
the oil residue enters the oil residue collecting device from the bottom of the gas-residue separating device.
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| CN202010004947.5A CN111072190A (en) | 2020-01-03 | 2020-01-03 | Electrocatalytic oxidation and air flotation coalescence treatment process method and equipment for oil-containing sewage |
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| CN202010004947.5A CN111072190A (en) | 2020-01-03 | 2020-01-03 | Electrocatalytic oxidation and air flotation coalescence treatment process method and equipment for oil-containing sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115215413A (en) * | 2022-06-12 | 2022-10-21 | 天津正达科技有限责任公司 | Pretreatment method for polymer-containing wastewater |
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