CN113184960A - Three-dimensional electrocatalytic oxidation equipment - Google Patents

Three-dimensional electrocatalytic oxidation equipment Download PDF

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CN113184960A
CN113184960A CN202110668723.9A CN202110668723A CN113184960A CN 113184960 A CN113184960 A CN 113184960A CN 202110668723 A CN202110668723 A CN 202110668723A CN 113184960 A CN113184960 A CN 113184960A
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electrolytic cell
electrolytic
electrocatalytic oxidation
plate
sewage
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周海玲
李旻
赵子林
郭运达
王德东
杨爱莲
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Beijing Manjie Environmental Engineering Co ltd
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Beijing Manjie Environmental Engineering Co ltd
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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
    • 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
    • C02F1/46114—Electrodes in particulate form or with conductive and/or non conductive particles between them
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4612—Controlling or monitoring
    • C02F2201/46145—Fluid flow
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4619—Supplying gas to the electrolyte
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/20—Total organic carbon [TOC]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/026—Fenton's reagent

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The invention discloses a three-dimensional electrocatalytic oxidation device, which comprises: the electrolytic cell comprises an electrolytic cell, wherein at least one electrolytic group is arranged in the electrolytic cell, each electrolytic group comprises at least one cathode plate and at least one anode plate, the anode plates are graphite electrode plates, graphene electrode plates or titanium-based metal oxide electrode plates, the cathode plates are graphite electrode plates, graphene electrode plates, titanium-based metal oxide electrode plates or stainless steel electrode plates, and particle electrodes are arranged between the cathode plates and the anode plates; the water outlet of the sewage inlet pipe is communicated with the water inlet of the electrolytic cell; and the water inlet of the drain pipe is communicated with the water outlet of the electrolytic cell, and sewage entering the electrolytic cell is discharged from the drain pipe after passing through the electrolytic cell. The structural design of the three-dimensional electrocatalytic oxidation equipment can effectively improve the removal rate of wastewater TOC.

Description

Three-dimensional electrocatalytic oxidation equipment
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a three-dimensional electrocatalytic oxidation device.
Background
The current advanced oxidation treatment technology in the market is a Fenton oxidation method, a photocatalytic oxidation method, an electrocatalytic oxidation method, an ozone catalytic oxidation method and the like, wherein a large amount of iron-containing sludge is generated in the reaction process of the Fenton oxidation method; the photocatalytic oxidation method has low utilization rate of a light source and large energy consumption; the catalytic ozonation method can decompose automatically in a short time, and the treatment efficiency of low-concentration organic matters is low. The high COD and high salt wastewater treatment method has different defects in the advanced oxidation method and can not be completely suitable, the electrocatalytic oxidation method has the synergistic effect of various active groups, does not need to add a medicament, can not generate a large amount of sludge, can fully reduce low-concentration organic matters, and is not limited by salt and low in energy consumption.
The electrocatalytic oxidation technology in China currently adopts a traditional Fenton micro-electro-catalytic oxidation method as a main method, most organic matters in sewage can be degraded by the method, and dichloromethane and the like are excluded. The electrocatalytic oxidation process technology is a technology integrating chemical, biological and physical technologies, and has strong specialization and great difficulty, so that the conventional electrocatalytic oxidation manufacturing enterprises have little scientific research investment and insufficient independent innovation capability. At present, no middle layer with low resistivity, high oxygen evolution potential, high corrosion resistance and high compactness is generally arranged between a titanium base layer and an active layer of the polar plate sold in the market, so that the service life of the polar plate is very short. The oxide of the active layer of the polar plate is single, the organic matters in the wastewater are diversified, the catalytic oxidation activities of different metal oxides on different organic matters in the wastewater are different, the selection of the oxide of the active layer needs to be changed according to the characteristics of the wastewater, the main side reaction in the electrocatalytic oxidation process is the precipitation of anode oxygen, the precipitation of chloride ions and chlorine in high wastewater, the anode selection needs to have high chlorine evolution potential to prevent the precipitation of toxic gases, and one necessary condition of the catalytic electrode is to have higher oxygen evolution overpotential (but hypochlorous acid generated by chlorine evolution in high ammonia nitrogen wastewater has good removal rate to the high ammonia nitrogen wastewater), so that the best removal rate to wastewater TOC (total organic carbon) in the prior art is caused.
Disclosure of Invention
In view of the above, the present invention provides a three-dimensional electrocatalytic oxidation apparatus, which has a structural design capable of effectively increasing the removal rate of wastewater TOC.
In order to achieve the purpose, the invention provides the following technical scheme:
a three-dimensional electrocatalytic oxidation apparatus comprising:
the electrolytic cell comprises an electrolytic cell, wherein at least one electrolytic group is arranged in the electrolytic cell, each electrolytic group comprises at least one cathode plate and at least one anode plate, the anode plates are graphite electrode plates, graphene electrode plates or titanium-based metal oxide electrode plates, the cathode plates are graphite electrode plates, graphene electrode plates, titanium-based metal oxide electrode plates or stainless steel electrode plates, and particle electrodes are arranged between the cathode plates and the anode plates;
the water outlet of the sewage inlet pipe is communicated with the water inlet of the electrolytic cell;
and the water inlet of the drain pipe is communicated with the water outlet of the electrolytic cell, and sewage entering the electrolytic cell is discharged from the drain pipe after passing through the electrolytic cell.
Preferably, in the above three-dimensional electrocatalytic oxidation apparatus, each of the electrolysis groups includes a plurality of cathode plates and anode plates arranged at intervals, and the particle electrodes are arranged between any two adjacent cathode plates and anode plates.
Preferably, in the above three-dimensional electrocatalytic oxidation apparatus, the electrolytic set further comprises an electrolytic bath, and the cathode plate and the anode plate are both disposed in the electrolytic bath.
Preferably, in the three-dimensional electrocatalytic oxidation apparatus, the number of the electrolysis groups is multiple, and the sewage entering the electrolytic cell sequentially passes through the multiple electrolysis groups and then is discharged from a drain pipe.
Preferably, in the three-dimensional electrocatalytic oxidation device, a water inlet is formed in the bottom of the electrolytic cell, and sewage enters from the bottom of the electrolytic cell and is discharged from the top of the electrolytic cell;
the electrolytic cell also comprises a drainage groove, and water flowing out of the top of the electrolytic cell enters the drainage groove and flows to the bottom water inlet of the next electrolytic cell along the drainage groove.
Preferably, in the above three-dimensional electrocatalytic oxidation apparatus, the heights of the water outlets of the electrolysis baths of the plurality of electrolysis groups decrease in sequence along the direction from the water inlet to the water outlet of the electrolysis bath.
Preferably, in the above three-dimensional electrocatalytic oxidation apparatus, the particle electrode is coal columnar activated carbon, coated coal columnar activated carbon, and γ -Al loaded with one or more metal oxides2O3And one or more of the spherulites, wherein the surface film of the coated coal columnar activated carbon is made of polyimide or cellulose acetate.
Preferably, the three-dimensional electrocatalytic oxidation device further comprises an aeration device, and an aeration pipe is arranged at the bottom of each electrolysis group.
Preferably, in the three-dimensional electrocatalytic oxidation apparatus, a water pump, a switch valve and a flowmeter are connected in series to the sewage inlet pipe.
Preferably, the three-dimensional electrocatalytic oxidation device further comprises a sewage tank, and the sewage inlet pipe is connected with the sewage tank
When the three-dimensional electrocatalytic oxidation device provided by the embodiment is applied, sewage enters the electrolytic cell through the sewage inlet pipe, and the sewage entering the electrolytic cell is discharged from the drain pipe after electrochemical oxidation reaction is carried out on the sewage through the electrolysis unit. The anode plate is a graphite electrode plate, a graphene electrode plate or a titanium-based metal oxide electrode plate, the cathode plate is a graphite electrode plate, a graphene electrode plate, a titanium-based metal oxide electrode plate or a stainless steel electrode plate, and the electrolytic reaction is as follows:
1.H2O2generation of
O produced by electrolysis2Or O provided by external aeration2Reducible to H at the cathode2O2
O2+2H++2e-→H2O2(under acidic Medium)
Figure BDA0003117995660000031
2. Production of OH
1) Titanium-based metal oxide anode
In the system, OH can be used in a metal catalyst (metal oxide plate, gamma-Al)2O3Supported ruthenium iridium, iridium tantalum, and gamma-Al2O3Loaded with copper-iron oxide) is generated
Mred+H2O2+H+→Mox+·OH+H2O (under acidic conditions)
Mred+H2O2→Mox+·OH+OH-(under alkaline conditions)
Water or OH in solution-The roots are adsorbed on the surface of the metal oxide anode under the action of an electric field:
MOx+H2O→MOx(·OH)+H++e-(under acidic conditions)
MOx+OH-→MOx(·OH)+e-(under alkaline conditions)
OH interacts with the oxygen atoms of the anodic oxide, which in the radical enter the lattice of the metal oxide to form a peroxide of the metal.
MOx(·OH)→MOx+1+H++e
In the presence of organic impurities in the solution:
R+MOx(·OH)n→C02+MOx+nH++ne-R+MOx+1→RO+MOx
can simply express the generation of metal oxide electrode-OH
2H2O-2e-→2·OH+2H+(under acidic conditions)
OH--e--→ 2. OH (under alkaline condition)
2) Graphite-graphene electrode
In the gamma-Al of the supported metal oxide2O3On the particle electrode
Mred+H2O2+H+→Mox+·OH+H2O (under acidic conditions)
Mred+H2O2→Mox+·OH+OH-(under alkaline conditions)
(MredReduced state of the metal catalyst, MoxIn the oxidized state)
Under the condition of trigger catalyst, Fenton and Fenton-like reactions are generated
Such as: fe2++H2O2→Fe3++·OH+OH-
Cu2++H2O2→Cu++·OOH+H+
Cu++H2O2→Cu2++·OH+OH-
As is clear from the above, in the electrooxidation process, highly reactive OH is generated, and this OH gene rapidly initiates an oxidation chain reaction, and finally, the organic substance is oxidatively decomposed into CO2、H2And O. The whole electrolysis process does not need to add chemical agents, secondary pollution is avoided, the reaction condition is mild, the reactor can run efficiently at normal temperature and normal pressure, and the removal rate of the TOC in the wastewater is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a three-dimensional electrocatalytic oxidation apparatus provided by an embodiment of the present invention;
FIG. 2 is a top plan view of an electrolytic cell provided by an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an electrolytic cell provided in an embodiment of the present invention.
In the figure:
1-a flow meter, 2-a sewage inlet pipe, 3-an electrolytic tank, 4-an electrolytic tank, 5-a water storage tank, 6-a graphene electrode plate, 7-an aeration pipe, 8-an aeration device, 9-a sewage tank, 10-a drainage tank, 10 a-a first sub-tank and 10 b-a second sub-tank.
Detailed Description
The invention aims to provide a three-dimensional electrocatalytic oxidation device, which has a structural design capable of effectively improving the removal rate of wastewater TOC.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 3, the three-dimensional electrocatalytic oxidation apparatus provided by the present application includes an electrolytic cell 3, a sewage inlet pipe 2, and a drain pipe.
Wherein, at least one electrolytic group is arranged in the electrolytic cell 3, and each electrolytic group comprises at least one cathode plate and an anode plate. Specifically, each electrolysis group may include a cathode plate and an anode plate which are oppositely arranged, or the electrolysis group may also include a plurality of cathode plates and a plurality of anode plates, and the plurality of cathode plates and the plurality of anode plates are sequentially arranged at intervals.
The anode plate is a graphite electrode plate, a graphene electrode plate or a titanium-based metal oxide electrode plate, the cathode plate is a graphite electrode plate, a graphene electrode plate, a titanium-based metal oxide electrode plate or a stainless steel electrode plate, and a particle electrode is arranged between the cathode plate and the anode plate, namely a particle electrode is arranged between any adjacent cathode plate and anode plate. Specifically, according to the wastewater quality: the negative plate is one or two of a graphite electrode plate, a graphene electrode plate, a stainless steel electrode plate and a titanium mesh electrode plate, and the positive plate is one or more of a graphite electrode plate, a graphene electrode plate and titanium-based metal oxides (ruthenium iridium oxide, iridium tantalum, tin oxide and lead oxide).
The water outlet of the sewage inlet pipe 2 is communicated with the water inlet of the electrolytic cell 3, and sewage enters the electrolytic cell 3 through the sewage inlet pipe 2. The water inlet of the drain pipe is communicated with the water outlet of the electrolytic cell 3, and the water in the electrolytic cell 3 can be discharged through the drain pipe. The sewage entering the electrolytic cell 3 is discharged from the drain pipe after passing through the electrolysis unit, and specifically, the sewage entering the electrolytic cell 3 is discharged from the drain pipe after undergoing an electrochemical oxidation reaction by the electrolysis unit.
When the three-dimensional electrocatalytic oxidation device provided by the embodiment is applied, sewage enters the electrolytic cell 3 through the sewage inlet pipe 2, and the sewage entering the electrolytic cell 3 is discharged from the drain pipe after undergoing an electrochemical oxidation reaction through the electrolysis unit. The negative plate and the positive plate are both graphite electrode plates, graphene electrode plates 6 or titanium-based metal oxide electrode plates, and the electrolytic reaction is as follows:
1.H2O2generation of
O produced by electrolysis2Or O provided by external aeration2Reducible to H at the cathode2O2
O2+2H++2e-→H2O2(under acidic Medium)
Figure BDA0003117995660000061
2. Production of OH
1) Titanium-based metal oxide anode
OH in the system can be in the presence of a metal catalyst (metal oxide)Chemical polar plate, gamma-Al2O3Supported ruthenium iridium, iridium tantalum, and gamma-Al2O3Loaded with copper-iron oxide) is generated
Mred+H2O2+H+→Mox+·OH+H2O (under acidic conditions)
Mred+H2O2→Mox+·OH+OH-(under alkaline conditions)
Adsorption of hydroxyl radicals and metal peroxides to metal oxides
Water or OH in solution-The roots are adsorbed on the surface of the metal oxide anode under the action of an electric field:
MOx+H2O→MOx(·OH)+H++e-(under acidic conditions)
MOx+OH-→MOx(·OH)+e-(under alkaline conditions)
OH interacts with the oxygen atoms of the anodic oxide, which in the radical enter the lattice of the metal oxide to form a peroxide of the metal.
MOx(·OH)→MOx+1+H++e
In the presence of organic impurities in the solution:
R+MOx(·OH)n→C02+MOx+nH++ne-
R+MOx+1→RO+MOx
can simply express the generation of metal oxide electrode-OH
2H2O-2e-→2·OH+2H+(under acidic conditions)
OH--e--→ 2. OH (under alkaline condition)
2) Graphite-graphene electrode
In the gamma-Al of the supported metal oxide2O3On the particle electrode
Mred+H2O2+H+→Mox+·OH+H2O (under acidic conditions)
Mred+H2O2→Mox+·OH+OH-(under alkaline conditions)
(MredReduced state of the metal catalyst, MoxIn the oxidized state)
Under the condition of trigger catalyst, Fenton and Fenton-like reactions are generated
Such as: fe2++H2O2→Fe3++·OH+OH-
Cu2++H2O2→Cu++·OOH+H+
Cu++H2O2→Cu2++·OH+OH-
As is clear from the above, in the electrooxidation process, highly reactive OH is generated, and this OH gene rapidly initiates an oxidation chain reaction, and finally, the organic substance is oxidatively decomposed into CO2、H2And O. The whole electrolysis process does not need to add chemical agents, secondary pollution is avoided, the reaction condition is mild, the reactor can run efficiently at normal temperature and normal pressure, and the removal rate of the TOC in the wastewater is greatly improved.
In one embodiment, each electrolytic group comprises a plurality of cathode plates and anode plates arranged at intervals, and particle electrodes are arranged between any two adjacent cathode plates and anode plates. So set up, a plurality of negative plates and anode plate carry out the electrolysis simultaneously, can improve electrolysis efficiency greatly.
In another embodiment, the electrolytic cell further comprises an electrolytic cell 4, and the cathode plate and the anode plate are both disposed in the electrolytic cell 4. When the number of the electrolysis groups is plural, the electrolysis baths 4 of the plural electrolysis groups are independent of each other, and the sewage flows through the plural electrolysis baths 4 in sequence to carry out the electrolysis reaction.
Furthermore, the number of the electrolysis groups is multiple, and the sewage entering the electrolysis cell 3 is discharged from the drain pipe after sequentially passing through the multiple electrolysis groups. Specifically, the sewage entering the electrolytic cell 3 passes through a plurality of electrolytic groups in sequence, undergoes electrolytic reaction and is discharged from a drain pipe. So set up, sewage carries out the electrolysis through a plurality of electrolysis groups in proper order, and multiple electrolysis has further improved the clearance of waste water TOC. Preferably, the number of the electrolytic sets is four, or the number of the electrolytic sets may be three, five, etc., without limitation.
Further, the bottom of the electrolytic tank 4 is provided with a water inlet, and sewage enters from the bottom of the electrolytic tank 4 and is discharged from the top. In other words, the sewage enters the electrolytic tank 4 from the bottom of the electrolytic tank 4, the water level of the sewage in the electrolytic tank 4 gradually rises from bottom to top until the sewage submerges the cathode plate and the anode plate in the electrolytic tank 4, and finally the sewage flows out from the top of the electrolytic tank 4.
The electrolytic cell 3 also comprises a drainage groove 10, and water flowing out of the top of the electrolytic cell 4 enters the drainage groove 10 and flows along the drainage groove 10 to the water inlet at the bottom of the next electrolytic cell 4. The water flowing out of the previous electrolytic tank 4 is drained to the next electrolytic tank 4 through the drainage groove 10. Specifically, the drainage groove 10 comprises a first sub-groove 10a and a second sub-groove 10b which are communicated, the two adjacent electrolytic grooves 4 are respectively a first electrolytic groove and a second electrolytic groove, and the notch of the first sub-groove 10a is lower than the top of the first electrolytic groove, so that water flowing out of the top of the first electrolytic groove enters the first sub-groove 10 a. The second divides groove 10b to set up along vertical direction, and the bottom that the second divides groove 10b and the bottom import intercommunication of second electrolysis trough to realize that the rivers of first minute groove 10a go into the second branch inslot 10b back, the rivers in the second branch groove 10b advance in the second electrolysis trough, have finally realized drainage groove 10 with the drainage of the water that first electrolysis trough flows to the bottom inlet department of second electrolysis trough.
In order to prevent the water from flowing backwards, the heights of the water outlets of the electrolytic cells 4 of the plurality of electrolytic groups are sequentially reduced along the direction from the water inlet to the water outlet of the electrolytic cell 3. In other words, the highest water level that can be reached by the water in the plurality of electrolytic cells 4 decreases in sequence from the water inlet to the water outlet of the electrolytic cell 3.
The water inlet and the water outlet of the electrolytic cell 3 are respectively positioned on two opposite side walls of the electrolytic cell 3, the water inlet of the electrolytic cell 3 is positioned above the side walls of the electrolytic cell 3, and the water outlet of the electrolytic cell 3 is positioned below the side walls of the electrolytic cell 3.
Alternatively, the particle electrode is coal columnar activated carbon, coated coal columnar activated carbon, and gamma-Al loaded with one or more metal oxides2O3One of the spherulitesOr a plurality thereof. The material of the surface film of the coated coal columnar activated carbon is polyimide or cellulose acetate. Under the action of an electric field, one end of each particle electrode is subjected to an anode reaction, the other end of each particle electrode is subjected to a cathode reaction, the whole particles form a three-dimensional electrode, micro-electrolytic cells are formed among the particles, and the whole electrolytic cell is composed of the micro-electrolytic cells.
Further, the three-dimensional electrocatalytic oxidation device also comprises an aeration device 8, and the bottom of each electrolytic group is provided with an aeration pipe 7 to supplement oxygen into the electrolytic bath 4.
The sewage inlet pipe 2 is connected with a water pump, a switch valve and/or a flowmeter 1 in series. So, be convenient for control sewage inflow more.
The three-dimensional electrocatalytic oxidation equipment further comprises a sewage tank 9, and the sewage inlet pipe 2 is connected with the sewage tank 9. Or, the three-dimensional electrocatalytic oxidation equipment further comprises a water storage tank 5, and the water discharge pipe is connected with the water storage tank 5.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims (10)

1. A three-dimensional electrocatalytic oxidation apparatus, comprising:
the electrolytic cell comprises an electrolytic cell (3), wherein at least one electrolytic group is arranged in the electrolytic cell (3), each electrolytic group comprises at least one negative plate and at least one positive plate, the positive plate is a graphite electrode plate, a graphene electrode plate or a titanium-based metal oxide electrode plate, the negative plate is a graphite electrode plate, a graphene electrode plate, a titanium-based metal oxide electrode plate or a stainless steel electrode plate, and a particle electrode is arranged between the negative plate and the positive plate;
the water outlet of the sewage inlet pipe (2) is communicated with the water inlet of the electrolytic cell (3);
and the water inlet of the drain pipe is communicated with the water outlet of the electrolytic cell (3), and sewage entering the electrolytic cell (3) is discharged from the drain pipe after passing through the electrolytic group.
2. The three-dimensional electrocatalytic oxidation apparatus as set forth in claim 1, wherein each of said electrolytic sets comprises a plurality of spaced apart cathode plates and anode plates, and said particle electrodes are disposed between any adjacent two of said cathode plates and anode plates.
3. The three-dimensional electrocatalytic oxidation apparatus according to claim 1, wherein said electrolytic group further comprises an electrolytic cell (4), said cathode plate and anode plate being both disposed inside said electrolytic cell (4).
4. The three-dimensional electrocatalytic oxidation apparatus according to claim 3, wherein the number of said electrolytic cells is plural, and the sewage entering into said electrolytic cell (3) is discharged from a drain pipe after passing through plural said electrolytic cells in sequence.
5. The three-dimensional electrocatalytic oxidation apparatus according to claim 4, wherein the bottom of said electrolytic cell (4) is provided with a water inlet, and the sewage enters from the bottom of said electrolytic cell (4) and is discharged from the top;
the electrolytic cell (3) further comprises a drainage groove (10), and water flowing out of the top of the electrolytic cell (4) enters the drainage groove (10) and flows to a water inlet at the bottom of the next electrolytic cell (4) along the drainage groove (10).
6. The three-dimensional electrocatalytic oxidation apparatus according to claim 5, wherein the heights of the water outlets of the electrolysis cells (4) of a plurality of said electrolysis groups decrease in sequence in the direction from the water inlet to the water outlet of said electrolysis cell (3).
7. The three-dimensional electrocatalytic oxidation apparatus as set forth in claim 1, wherein said particle electrodes are coal columnar activated carbon, coated coal columnar activated carbon, and gamma-Al loaded with one or more metal oxides2O3And one or more of the spherulites, wherein the surface film of the coated coal columnar activated carbon is made of polyimide or cellulose acetate.
8. The three-dimensional electrocatalytic oxidation apparatus according to claim 1, further comprising aeration means (8), the bottom of each said electrolytic cell being provided with an aeration pipe (7).
9. The three-dimensional electrocatalytic oxidation apparatus according to claim 1, wherein a water pump, a switch valve and a flow meter (1) are connected in series to the wastewater inlet pipe (2).
10. The three-dimensional electrocatalytic oxidation apparatus according to claim 1, further comprising a sewage tank (9), wherein said sewage inlet pipe (2) is connected with said sewage tank (9).
CN202110668723.9A 2021-06-16 2021-06-16 Three-dimensional electrocatalytic oxidation equipment Pending CN113184960A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114590873A (en) * 2022-03-17 2022-06-07 山东太平洋环保股份有限公司 Three-dimensional electro-catalysis device and method for synchronously removing organic pollutants and total nitrogen
CN115231664A (en) * 2022-09-21 2022-10-25 山东北华环保股份有限公司 Electrolytic catalytic oxidation sewage treatment device
CN116395919A (en) * 2023-06-09 2023-07-07 威海蓝创环保设备有限公司 Nitroimidazole-containing wastewater treatment process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114590873A (en) * 2022-03-17 2022-06-07 山东太平洋环保股份有限公司 Three-dimensional electro-catalysis device and method for synchronously removing organic pollutants and total nitrogen
CN115231664A (en) * 2022-09-21 2022-10-25 山东北华环保股份有限公司 Electrolytic catalytic oxidation sewage treatment device
CN115231664B (en) * 2022-09-21 2022-12-30 山东北华环保股份有限公司 Electrolytic catalytic oxidation sewage treatment device
CN116395919A (en) * 2023-06-09 2023-07-07 威海蓝创环保设备有限公司 Nitroimidazole-containing wastewater treatment process
CN116395919B (en) * 2023-06-09 2023-11-14 威海蓝创环保设备有限公司 Nitroimidazole-containing wastewater treatment process

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