CN108298741B - Oily sewage electric flocculation high-efficient purifier - Google Patents

Oily sewage electric flocculation high-efficient purifier Download PDF

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Publication number
CN108298741B
CN108298741B CN201810115165.1A CN201810115165A CN108298741B CN 108298741 B CN108298741 B CN 108298741B CN 201810115165 A CN201810115165 A CN 201810115165A CN 108298741 B CN108298741 B CN 108298741B
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area
water
electric flocculation
purification
cylindrical electrode
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CN108298741A (en
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蒋文明
陈义美
刘杨
邓展飞
刘晓丽
何毅
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China University of Petroleum East China
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China University of Petroleum East China
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4676Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

The invention discloses an efficient electro-flocculation purification device for oily sewage, which comprises a water storage tank, an electro-flocculation area and a purification area, wherein a water flow inlet and a water flow outlet are formed in the water storage tank, and the water flow outlet is connected with the electro-flocculation area through a first water outlet pipe; the multi-return-stroke cylindrical electric flocculation device is characterized in that a plurality of multi-return-stroke cylindrical electric flocculation devices are arranged in the electric flocculation area, water outlets of the multi-return-stroke cylindrical electric flocculation devices are connected with the purification area through second water outlet pipes, a forced air floatation area, an inclined plate sedimentation area and a foam trapping area are arranged in the purification area, the inclined plate sedimentation device is arranged in the inclined plate sedimentation area, the forced air floatation area is located below the inclined plate sedimentation area, a pressurized air floatation device is arranged in the forced air floatation area, the foam trapping area is located above the inclined plate sedimentation area, and the foam trapping device is arranged in the foam trapping area. The device has the advantages of good separation effect and high integration degree, ensures the electric flocculation effect, reduces the overall height of the device, and is simpler and quicker to install and manage.

Description

Oily sewage electric flocculation high-efficient purifier
Technical Field
The invention relates to the field of wastewater treatment, in particular to an efficient electro-flocculation purification device for oily sewage.
Background
At present, most oil fields in China enter a tertiary oil recovery stage, and compared with conventional water-drive oil-extraction sewage, tertiary produced water has the characteristics of high water temperature, high mineralization degree, high bacteria content, high residual chemical agents and other substances and the like of the conventional water-drive oil-extraction sewage, and the addition of a polymer causes the problems of high viscosity, serious emulsification, strong capability of carrying solid suspended matters, high floating or sinking resistance of oil drops and solid particles, serious adsorption loss on a chemical adsorbent and the like. At present, the commonly used oil-containing sewage purification technologies mainly comprise: physical methods, chemical methods and biological methods, but the methods respectively have the problems of large energy consumption, high investment cost, complex equipment, difficult maintenance and the like. Therefore, research and development of new high-efficiency, energy-saving and economic technologies are urgently needed in the field of oily sewage treatment.
The electric flocculation is a high-efficiency and clean water quality purification technology, and is mainly a water quality purification technology which uses a soluble anode to generate a large amount of cations under the action of an external electric field, hydrolyzes the cations to generate hydroxide and polynuclear hydroxyl complexes with strong adsorption, flocculates waste water and removes pollutants. As an efficient and clean water quality purification technology, the electric flocculation combines the advantages of chemical flocculation and electrochemical methods for sewage treatment, the pollutants are removed more thoroughly, and inorganic pollutants and refractory organic pollutants which cannot be treated by the common method can be removed.
The traditional electric flocculation device is easy to passivate, needs to be cleaned regularly and is difficult to expand the capacity; the sewage with the same flow rate is treated, and the problems of large occupied area, dead water area, small polar water ratio, high energy consumption and the like exist.
Disclosure of Invention
Based on the technical problem, the invention provides an efficient electro-flocculation purification device for oily sewage.
The technical solution adopted by the invention is as follows:
an efficient electro-flocculation purification device for oily sewage comprises a water storage tank, an electro-flocculation area and a purification area, wherein a water flow inlet is formed in one side of the water storage tank, a water inlet pipe is connected to the water flow inlet, a water flow outlet is formed in the other side of the water storage tank, and the water flow outlet is connected with the electro-flocculation area through a first water outlet pipe;
a plurality of cylindrical multi-return electric flocculation devices are arranged in the electric flocculation area, each cylindrical multi-return electric flocculation device comprises an outer plastic barrel, a water inlet is formed in the center of one end of each outer plastic barrel and connected with the first water outlet pipe, a water outlet is formed in the side wall of each outer plastic barrel, an entity cylindrical electrode is arranged in the center of each outer plastic barrel, a plurality of cylindrical electrodes which are different in diameter and concentric with the outer plastic barrels are arranged on the outer sides of the entity cylindrical electrodes, the entity cylindrical electrodes and the cylindrical electrodes are both connected with a pulse power supply, and the pulse power supply is located in the pulse power supply placement area; a plugging plate is arranged between the end part of the cylindrical electrode with the smallest diameter and the plastic outer cylinder, and an electric flocculation reaction zone is formed between the cylindrical electrode with the smallest diameter and the solid cylindrical electrode and between the adjacent cylindrical electrodes; a water passing port is arranged at one end of each cylindrical electrode, the water passing ports between adjacent cylindrical electrodes are arranged in a staggered manner, and oily sewage entering from the water inlet sequentially passes through adjacent electrocoagulation reaction zones in an S shape; a disturbance strengthening area is formed between the cylindrical electrode with the largest diameter and the plastic outer cylinder, and a spiral sedimentation inclined plate is arranged in the disturbance strengthening area;
the water outlet is connected with the purification area through a second water outlet pipe, a forced air floating area, an inclined plate sedimentation area and a foam trapping area are arranged in the purification area, an inclined plate sedimentation device is arranged in the inclined plate sedimentation area, the forced air floating area is positioned below the inclined plate sedimentation area, a pressurized air floating device is arranged in the forced air floating area, the foam trapping area is positioned above the inclined plate sedimentation area, and the foam trapping area is internally provided with a foam trapping device; the purified water discharge port is arranged in the purification area.
Preferably, the upper part of the purification area is provided with an overflow port, and the overflow port is connected with the water storage tank through a sewage return pipe.
Preferably, the water passing opening is annular and is formed along the circumferential wall surface of the cylindrical electrode, and a grid plate is arranged at the water passing opening.
Preferably, the volume of the electroflocculation reaction zone formed between the cylindrical electrode with the smallest diameter and the solid cylindrical electrode, and between the adjacent cylindrical electrodes, is equal.
Preferably, the wall thickness of the cylindrical electrode decreases gradually from the inside to the outside.
Preferably, the plastic outer cylinder and the plugging plate are both made of PVC materials, and the solid cylindrical electrode and the cylindrical electrode are both made of aluminum materials.
The beneficial technical effects of the invention are as follows:
(1) the multi-layer concentric cylindrical electrode structure increases the polar water ratio, eliminates a dead water area, increases the electrode area and reduces the current density on the one hand, thereby reducing the overvoltage and improving the voltage efficiency; on the other hand, the configuration greatly increases the treatment flow of the water flow and the treatment capacity in unit time, and the purification effect is superior to that of a common dynamic electric flocculation device.
(2) When water flows from the inner side electric flocculation reaction zone to the adjacent outer side electric flocculation zone through the belt-shaped annular grid plate at the water gap, the water flow disorder caused by the grid plate promotes the particle mass transfer and the floc formation, and the purification effect is strengthened.
(3) The spiral sedimentation sloping plate is arranged between the outermost cylindrical electrode of the electric flocculation device and the outer cylinder of the plastic, the spiral sedimentation sloping plate changes a water flow path, the disturbance of water flow is caused, the collision adsorption of flocs and impurities is promoted, the centrifugal force effect of the spiral sloping plate can promote the separation of clear water and floc impurities, and the purification effect is improved.
(4) The electric flocculation purification device is horizontally arranged, the internal water pressure is lower, and the requirement on the pressure resistance of the manufacturing material is reduced.
(5) The external pulse power supply makes the cathode and the anode alternate, eliminates the defects of easy passivation, low efficiency and high energy consumption of direct current flocculation, and has good purification effect and low treatment cost.
(6) The efficient electrocoagulation purifying device for oily sewage has high integration degree, ensures the electrocoagulation effect, and reduces the overall height of the device, so that the floor area of a large-scale device can be reduced, the manufacturing, installation and management of equipment are simpler and faster, and in addition, the skid-mounted cylindrical multi-return-stroke electrocoagulation device is adopted, can be randomly assembled according to the sewage treatment requirement, and has strong practicability.
(7) In order to promote the floating of flocs and avoid heavy workload in the later sludge treatment process, the device is provided with a pressurized air flotation device below an inclined plate sedimentation area, bubbles are pumped in through a pressurizing pump, the air flotation effect is enhanced, the buoyancy of the flocs is larger than the gravity, the flocs float upwards, and when the liquid level reaches a certain height, the foam and the flocs on the upper layer are intercepted by a foam catcher, so that the floc separation effect is good; in addition, the oily sewage on the upper layer can be returned to the electric flocculation device for further treatment through the overflow port and the sewage return pipe according to the purification standard requirement.
Drawings
The invention will be further described with reference to the following detailed description and drawings:
FIG. 1 is a schematic diagram of the structural principle of the electric flocculation high-efficiency purification device of the invention, mainly showing the sectional structure of the device;
FIG. 2 is a top view of the electric flocculation high-efficiency purification device of the invention;
FIG. 3 is a schematic structural diagram of the cylindrical multi-pass electric flocculation apparatus of the present invention, mainly showing a sectional structure;
FIG. 4 is a side view of a cylindrical multi-pass electroflocculation apparatus according to the present invention;
fig. 5 is a schematic structural diagram of the spiral sedimentation inclined plate of the present invention.
Detailed Description
Combine the attached drawing, a oily sewage electric flocculation high-efficient purifier, including aqua storage tank 1, electric flocculation district 2 and clean area 3, be provided with rivers entry 101 on one side upper portion of aqua storage tank 1, rivers entry 101 department is connected with the oral siphon, is provided with the rivers export in the opposite side lower part of aqua storage tank 1, and the rivers export is connected with electric flocculation district 2 through first outlet pipe 4.
A plurality of cylindrical multi-return electric flocculation devices 5 are arranged in the electric flocculation area 2, each cylindrical multi-return electric flocculation device 5 comprises a plastic outer cylinder 501, a water inlet 502 is arranged at the center of one end of each plastic outer cylinder 501, the water inlet 502 is communicated with the first water outlet pipe 4, and a water outlet 503 is arranged on the side wall of each plastic outer cylinder 501. A solid cylindrical electrode 504 is arranged at the center of the plastic outer cylinder 501, a plurality of cylindrical electrodes 505 which have different diameters and are concentric with the plastic outer cylinder are arranged outside the solid cylindrical electrode 504, the solid cylindrical electrode 504 and the cylindrical electrodes 505 are both connected with a pulse power supply, and the pulse power supply is positioned in the pulse power supply placing area 6. A blocking plate 506 is arranged between the end of the cylindrical electrode with the smallest diameter and the plastic outer cylinder, and an electric flocculation reaction zone 507 is formed between the cylindrical electrode with the smallest diameter and the solid cylindrical electrode and between the adjacent cylindrical electrodes. A water passing port 508 is arranged at one end of each cylindrical electrode, and water passing ports between adjacent cylindrical electrodes are arranged in a staggered mode, so that oily sewage entering from the water inlet 502 sequentially passes through adjacent electroflocculation reaction zones in an S shape. A disturbance strengthening region 509 is formed between the cylindrical electrode with the largest diameter and the plastic outer cylinder, a spiral sedimentation inclined plate 7 is arranged in the disturbance strengthening region 509, the spiral sedimentation inclined plate 7 comprises a central shaft 701, and a spiral plate body 702 is arranged on the central shaft 701.
The water outlet 503 is connected with the purification area 3 through a second water outlet pipe 8, a forced air floating area, an inclined plate sedimentation area and a foam trapping area are arranged in the purification area 3, an inclined plate sedimentation device 301 is arranged in the inclined plate sedimentation area, the forced air floating area is positioned below the inclined plate sedimentation area, a pressurized air floating device 302 is arranged in the forced air floating area, the foam trapping area is positioned above the inclined plate sedimentation area, and the foam trapping device 303 is arranged in the foam trapping area; a clean water discharge 304 is provided in the purification zone.
As a further design of the invention, the upper part of the purification area is provided with an overflow port which is connected with the water storage tank 1 through a sewage return pipe 9.
Furthermore, the water passing opening 508 is annular and is formed along the circumferential wall surface of the cylindrical electrode, and a grid plate for enhancing the water flow turbulence effect is arranged at the water passing opening.
Furthermore, the multi-return-stroke electric flocculation device adopts an equal-flow design, and the increasing value of the radius of the cylindrical electrode from inside to outside is continuously reduced so as to ensure that the volumes of the electric flocculation reaction zones formed between the cylindrical electrode with the minimum diameter and the solid cylindrical electrode and between the adjacent cylindrical electrodes are equal.
Further, the wall thickness of the cylindrical electrode decreases gradually from the inside to the outside.
The plastic outer cylinder body and the plugging plate are both made of PVC materials, and the solid cylindrical electrode and the cylindrical electrode are both made of aluminum materials.
4-8 cylindrical multi-return-stroke electric flocculation devices are preferably horizontally arranged in the electric flocculation area, and 3-5 cylindrical electrodes are preferably arranged in the cylindrical multi-return-stroke electric flocculation devices.
The inclined plate sedimentation device 301, the pressurized air flotation device 302 and the foam trapping device 303 can be realized by adopting the existing design. For example, the inclined plate sedimentation device (inclined plate settler) can be composed of a plurality of inclined plates which are parallel and form a certain angle, and the space between the adjacent inclined plates is equal. The pressurized air floating device can also comprise a pressurizing pump and an aeration pipeline connected with the pressurizing pump, wherein the aeration pipeline is provided with aeration holes so as to inject air bubbles into the bottom of the purification area to strengthen the air floating effect.
The upper part of the purifying area 3 is enclosed by an overflow plate body to form an overflow trough, the foam trapping device is positioned in the overflow trough, and a corresponding overflow port is correspondingly arranged at the overflow trough.
The working process of the present invention is explained below:
oily sewage flows into the aqua storage tank through the rivers entry, and is static in the aqua storage tank, and partly solid impurity carries out preliminary sedimentation with the suspended solid and separates, and sewage after preliminary treatment gets into many return strokes of cylinder electric flocculation device through first outlet pipe, carries out purification treatment and carries out the preliminary separation of floc impurity under the centrifugal force effect of spiral swash plate through impurity such as flocculation, air supporting, redox effect to sump oil, organic matter, bacterium, ion in the sewage. The primary purified water after the electric flocculation treatment flows out of the second water outlet pipe and enters a purification area, and further separation of floc impurities and clear water is carried out by an inclined plate sedimentation device. In order to promote the floating of the flocs and avoid heavy workload in the later sludge treatment process, a pressurized air flotation device is added below the inclined tube settling area, bubbles are pumped into the inclined tube settling area through a pressurizing pump, the air flotation effect is enhanced, the buoyancy of the flocs is larger than the gravity, and the flocs float upwards. Along with the reaction, the sewage quantity in the purification area is continuously increased (the purified water discharge port is in a closed state), the liquid level is increased, when the liquid level reaches the height of the foam catcher, the foam and the floc on the upper layer are intercepted by the foam catcher, the oily sewage on the upper layer returns to the electric flocculation treatment device through the overflow port and the sewage return pipe for further treatment, and the water flow reaching the purification standard flows out from the purified water discharge port.
The multi-return-stroke electric flocculation device adopted by the electric flocculation area comprises an entity aluminum cylindrical central electrode and a plurality of aluminum concentric cylindrical electrodes which divide the inner space of an outer cylinder into a plurality of electric flocculation reaction areas; water outlets are alternately arranged on the left side and the right side of each adjacent cylindrical electrode, so that water flows into the adjacent outer side electrocoagulation reaction zones from the inner side electrocoagulation reaction zone in an S shape. Under the condition of the same floor area, the configuration of the multilayer concentric cylindrical electrode increases the polar water ratio and eliminates a dead water area on one hand; the electrode area is increased, and the current density is reduced, so that the overvoltage is reduced, and the voltage efficiency is improved. On the other hand, the configuration greatly increases the treatment flow of the water flow and the treatment capacity in unit time, and the purification effect is superior to that of a common dynamic electric flocculation device.
Oily sewage in the multi-return-stroke electric flocculation device flows in from a water inlet of the left circular barrel cover, and flows out from a water outlet connected with the barrel wall of the plastic outer barrel body after multiple times of electric flocculation treatment and primary sedimentation separation. When water flows from the inner side electric flocculation reaction zone to the adjacent outer side electric flocculation zone through the water gap, the water flow disorder caused by the annular strip-shaped grid plate promotes the particle mass transfer and the floc formation, and the purification effect is strengthened. The spiral sedimentation sloping plate is arranged between the cylindrical electrode at the outermost side and the cylindrical wall of the outer cylinder, the spiral sedimentation sloping plate changes a water flow path, the disturbance of water flow is caused, the collision adsorption of flocs and impurities is promoted, the separation of clear water and floc impurities can be promoted under the centrifugal force action of the spiral sedimentation sloping plate, and the purification effect is improved.
The multi-return-stroke electric flocculation device is horizontally arranged, the internal water pressure is lower, and the requirement on the pressure resistance of a manufacturing material is reduced. The pulse power supply makes the cathode and the anode alternate, eliminates the defects of easy passivation, low efficiency and high energy consumption of direct current flocculation, and has good purification effect and low treatment cost.
The technical contents not mentioned in the above modes can be realized by adopting or referring to the prior art.
It should be noted that the above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose of the present invention is to enable the skilled person to understand the contents and methods of the present invention and to implement the method smoothly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the disclosure of the present invention are covered by the protection scope of the present invention.

Claims (4)

1. The utility model provides a high-efficient purifier of oily sewage electric flocculation which characterized in that: the device comprises a water storage tank, an electric flocculation area and a purification area, wherein a water flow inlet is formed in one side of the water storage tank, an inlet pipe is connected to the water flow inlet, a water flow outlet is formed in the other side of the water storage tank, and the water flow outlet is connected with the electric flocculation area through a first water outlet pipe;
a plurality of cylindrical multi-return electric flocculation devices are arranged in the electric flocculation area, each cylindrical multi-return electric flocculation device comprises an outer plastic barrel, a water inlet is formed in the center of one end of each outer plastic barrel and connected with the first water outlet pipe, a water outlet is formed in the side wall of each outer plastic barrel, an entity cylindrical electrode is arranged in the center of each outer plastic barrel, a plurality of cylindrical electrodes which are different in diameter and concentric with the outer plastic barrels are arranged on the outer sides of the entity cylindrical electrodes, the entity cylindrical electrodes and the cylindrical electrodes are both connected with a pulse power supply, and the pulse power supply is located in the pulse power supply placement area; a plugging plate is arranged between the end part of the cylindrical electrode with the smallest diameter and the plastic outer cylinder, and an electric flocculation reaction zone is formed between the cylindrical electrode with the smallest diameter and the solid cylindrical electrode and between the adjacent cylindrical electrodes; a water passing port is arranged at one end of each cylindrical electrode, the water passing ports between adjacent cylindrical electrodes are arranged in a staggered manner, and oily sewage entering from the water inlet sequentially passes through adjacent electrocoagulation reaction zones in an S shape; a disturbance strengthening area is formed between the cylindrical electrode with the largest diameter and the plastic outer cylinder, and a spiral sedimentation inclined plate is arranged in the disturbance strengthening area;
the water outlet is connected with the purification area through a second water outlet pipe, a forced air floating area, an inclined plate sedimentation area and a foam trapping area are arranged in the purification area, an inclined plate sedimentation device is arranged in the inclined plate sedimentation area, the forced air floating area is positioned below the inclined plate sedimentation area, a pressurized air floating device is arranged in the forced air floating area, the foam trapping area is positioned above the inclined plate sedimentation area, and the foam trapping area is internally provided with a foam trapping device; a purified water outlet is arranged in the purification area; the upper part of the purification area is provided with an overflow port which is connected with the water storage tank through a sewage return pipe; the water passing port is annular and is formed along the circumferential wall surface of the cylindrical electrode, and a grid plate is arranged at the water passing port.
2. The efficient electro-flocculation purification device for oily sewage according to claim 1, which is characterized in that: the volume of the electrocoagulation reaction zone formed between the cylindrical electrode with the smallest diameter and the solid cylindrical electrode and between the adjacent cylindrical electrodes is equal.
3. The efficient electro-flocculation purification device for oily sewage according to claim 1, which is characterized in that: the wall thickness of the cylindrical electrode decreases gradually from the inside to the outside.
4. The efficient electro-flocculation purification device for oily sewage according to claim 1, which is characterized in that: the plastic outer cylinder body and the plugging plate are both made of PVC materials, and the solid cylindrical electrode and the cylindrical electrode are both made of aluminum materials.
CN201810115165.1A 2018-02-06 2018-02-06 Oily sewage electric flocculation high-efficient purifier Active CN108298741B (en)

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Publication number Priority date Publication date Assignee Title
CN110451697A (en) * 2019-07-30 2019-11-15 江苏中圣高科技产业有限公司 Salt-containing organic wastewater electrocatalytic oxidation coupling pretreatment method and device
CN110713293A (en) * 2019-11-07 2020-01-21 榆林学院 Electric flocculation equipment for purifying oil-gathering sewage and treatment method
CN114477575B (en) * 2022-03-31 2022-06-28 山东格林诺斯环保科技有限公司 Plug-flow type electrocoagulation-air flotation-sedimentation all-in-one machine

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Publication number Priority date Publication date Assignee Title
US3793173A (en) * 1969-02-03 1974-02-19 K Price Wastewater treatment using electrolysis with activated carbon cathode
CN1172867A (en) * 1996-08-01 1998-02-11 刘正立 Water pressure osmotic membrane electrolytic water device
CN202594832U (en) * 2012-02-09 2012-12-12 云南银发绿色环保产业股份有限公司 Coaxial electric flocculation water treatment system
CN203754514U (en) * 2014-01-21 2014-08-06 张庆忠 Progressive air flotation device
CN205347057U (en) * 2016-01-21 2016-06-29 北京奥友兴业科技发展有限公司 Oil field tertiary oil recovery effluent disposal system
CN105793474A (en) * 2013-12-03 2016-07-20 德诺拉工业有限公司 Electrolytic cell equipped with concentric electrode pairs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793173A (en) * 1969-02-03 1974-02-19 K Price Wastewater treatment using electrolysis with activated carbon cathode
CN1172867A (en) * 1996-08-01 1998-02-11 刘正立 Water pressure osmotic membrane electrolytic water device
CN202594832U (en) * 2012-02-09 2012-12-12 云南银发绿色环保产业股份有限公司 Coaxial electric flocculation water treatment system
CN105793474A (en) * 2013-12-03 2016-07-20 德诺拉工业有限公司 Electrolytic cell equipped with concentric electrode pairs
CN203754514U (en) * 2014-01-21 2014-08-06 张庆忠 Progressive air flotation device
CN205347057U (en) * 2016-01-21 2016-06-29 北京奥友兴业科技发展有限公司 Oil field tertiary oil recovery effluent disposal system

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