CN209815742U - Electrocatalytic oxidation device for electroplating wastewater treatment - Google Patents
Electrocatalytic oxidation device for electroplating wastewater treatment Download PDFInfo
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- CN209815742U CN209815742U CN201920418802.2U CN201920418802U CN209815742U CN 209815742 U CN209815742 U CN 209815742U CN 201920418802 U CN201920418802 U CN 201920418802U CN 209815742 U CN209815742 U CN 209815742U
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Abstract
The utility model discloses an electrocatalytic oxidation device for electroplating wastewater treatment, which comprises a reactor box body, an electrode group arranged in the reactor box body, a power supply for supplying power to the electrode group and a hoisting system for maintaining the device. The reactor box is a square sealed water tank, the reactor box is compacted and sealed by a shell and a sealing plate through a fixing bolt and a gasket, and gas generated in the electrocatalytic oxidation process flows out from an exhaust port. The electrode group is fixed on the inner frame and is powered by a high-power direct-current power supply, pollutants such as organic matters, cyanides, ammonia nitrogen and the like in the wastewater are oxidized at the anode, and pollutants such as heavy metal, nitrate nitrogen and the like in the wastewater are reduced at the cathode. When the equipment is stopped for maintenance, the electrode group can be integrally lifted by the hoisting equipment, and the pole plate is cleaned or replaced according to the use condition. The utility model has the characteristics of need not to throw with the oxidant, reaction condition is mild, running cost is low, easy to maintain, degree of automation is high, is a extensive applicability extensive advanced oxidation unit.
Description
Technical Field
The utility model relates to the technical field of removing of metal coating, in particular to an electrocatalytic oxidation device for electroplating wastewater treatment.
Background
Electroplating wastewater, such as chromium-containing wastewater, copper ammonia wastewater, pretreatment wastewater, mixed wastewater and the like, is characterized by strong pollution, various pollutants, poor biodegradability and the like, and the treatment thereof is one of the important concerns of electroplating enterprises. The national discharge Standard for electroplating pollutants GB 21900-2008 provides: existing enterprises implement the table I standard from 2009, 01 month to 2010, 06 month and 30 days; the existing enterprise executes the standard of table II from year 2010, month 07, and day 01, and the newly-built enterprise from year 2008, month 08, and day 01; in areas where the density of the development of the homeland is high, the environmental bearing capacity begins to weaken, or the water environment capacity is small, the ecological environment is fragile, and a special protection measure needs to be taken because of the high possibility of serious water environment pollution, the pollutant emission behavior of the facility should be strictly controlled, and the standard in table III is implemented.
The treatment method of electroplating wastewater is different according to the water quality characteristics, such as a chromium-containing wastewater reduction-coagulation precipitation method, a copper ammonia wastewater ferrous sulfate method, a mixed wastewater alkaline cyanogen breaking-reduction-coagulation precipitation method and the like, wherein a plurality of types of wastewater need to be oxidized during treatment so as to achieve the purposes of improving wastewater biodegradability, cyanide breaking, complex breaking, directly removing pollutants and the like. The typical representative of the oxidation of electroplating wastewater is a Fenton oxidation method, however, in the treatment process of the method, chemical agents such as acid, alkali, hydrogen peroxide, ferrous salt and the like need to be added, the dependence on the agents is strong, the sludge amount is large, the sludge disposal cost is high, and the treatment cost is high. With the increasing of environmental protection, the prices of various chemical raw materials are increasing, and the cost of the traditional treatment method relying on chemical agents is also increasing. Meanwhile, the sludge disposal cost is also rapidly increasing, which also increases the treatment cost of the electroplating wastewater.
According to the specific important field of equipment development in the guidance suggestion about accelerating the development of the environmental protection equipment manufacturing industry in 2017 of the Ministry of industry and belief of China, the important technical aspects of anaerobic ammonia oxidation technical equipment, electrolytic catalytic oxidation, supercritical oxidation and the like are explained, the advanced membrane treatment technology and components with biological enhancement, low energy consumption and high efficiency are researched and developed, the basic research such as drinking water trace toxic pollutant treatment technical equipment is developed, and the electroplating wastewater is treated in an electrochemical mode, so that the method is more green and clean and is a novel electroplating wastewater treatment technology with low cost.
Disclosure of Invention
Utility model purpose: the utility model aims at solving the not enough among the prior art, provide an electroplating effluent handles electrocatalytic oxidation device, under the electric field effect, the strong oxidizing property intermediate product reaction that waste water and electrocatalytic oxidation device positive pole produced, accomplish including COD, the ammonia nitrogen, the cyanide, heavy metal, getting rid of total nitrogen etc. the cyanide is by oxidation "broken cyanogen", the complex is by oxidation "broken twine", COD, the ammonia nitrogen, total nitrogen etc. are by oxidation or reduction for carbon dioxide, nitrogen gas, micromolecules such as water, the heavy metal is by being changed into the free state by the complex state or by the reduction for the simple substance. The utility model discloses need not to throw with oxidant, reaction condition is mild, running cost is low, easy to maintain, degree of automation is high, and when equipment shut down the maintenance, the electrode group can wholly be hoisted by hoisting equipment, carries out the polar plate according to in service behavior and washs or change by force, green, clean, with low costs.
The technical scheme is as follows: an electrocatalytic oxidation device for electroplating wastewater treatment, comprising: the device comprises a reactor box body, an electrode group, a power supply and hoisting equipment;
the electrode group is arranged in the reactor box body;
the electrode group is electrically connected with a power supply;
the hoisting equipment is connected with the electrode group and arranged above the reactor box body and used for hoisting the electrode group.
The utility model is further improved in that the reactor box body is connected with an external circulating pump through a pipeline; the reactor boxes are multiple and are connected in series or in parallel.
The utility model has the further improvement that the reactor box body consists of a shell, a sealing cover and supporting legs; the sealing cover is fixedly connected with the shell through a bolt and sealed through a gasket; the shell is provided with a water inlet, a water inlet sieve plate, a water outlet pipe, a water outlet, a gas outlet and a sewage outlet; the water inlet sieve plate is arranged on the side of the water inlet; the water outlet pipe is arranged at the water outlet side.
The utility model discloses a further improvement lies in, the closing cap is made by transparent machine glass plate material.
The utility model discloses a further improvement lies in, the outlet pipe is in any one of porous formula, sieve cellular type, straight-flow.
The utility model has the further improvement that the electrode group consists of an anode, a cathode, an anode connecting plate, a cathode connecting plate and an inner frame;
spacing and insulating the anode and the cathode through a limiting gasket;
the anode and the cathode are respectively and electrically connected with the anode connecting plate and the cathode connecting plate through cables and are fixed through electrode bolts;
the anode connecting plate and the cathode connecting plate are placed on the bracket;
the anode and the cathode are integrally placed on the inner frame and are insulated from each other by an insulating base plate;
the inner frame is provided with a lifting lug for lifting the electrode group integrally, and a side plate of the inner frame of the lifting lug is provided with a lifting lug;
the anode connecting plate and the cathode connecting plate are made of copper bars or aluminum bars; the bracket is also made of copper bars or aluminum bars; the bracket is fixed on the side wall of the reactor box body.
The further improvement of the utility model lies in that the anode is an inert inactive electrode which can be a titanium-based metal oxide composite electrode.
The utility model is further improved in that the power supply comprises a high-power direct-current power supply, a power supply anode and a power supply cathode, and the high-power direct-current power supply is used for converting alternating current into direct current; the positive electrode of the power supply is electrically connected with the anode connecting plate and is fixed by an electrode bolt; the negative pole of the power supply is electrically connected with the cathode connecting plate and is fixed by an electrode bolt; the high-power direct-current power supply is in a fixed direct-current mode or a pulse direct-current mode.
The utility model is further improved in that the hoisting equipment comprises a guide rail, an electric hoist and a sling; the guide rail is fixed on the top of a factory building or a steel structure; the electric hoist can move on the guide rail in a directional way; the sling is used for lifting the lifting lug to move up and down.
The utility model discloses a further improvement lies in, reactor box, hoisting equipment and electrode group, power whole insulation, and spacing gasket, support, internal frame, lug and positive pole, negative pole, positive pole connecting plate, negative pole connecting plate, cable, electrode bolt of electrode group are insulating each other, and junction or proximity department are provided with insulating material promptly.
The utility model discloses a chemical nickel waste water electrocatalytic oxidation treatment technology, including following process:
after the waste water enters the electrocatalytic oxidation device, the anode of the reactor is in contact with the waste water to carry out direct oxidation reaction or indirect oxidation reaction, and the direct oxidation reaction process is as follows:
the indirect oxidation reaction process comprises hydroxyl radical indirect oxidation, hypochlorite radical indirect oxidation and the like, and the hydroxyl radical indirect oxidation reaction process comprises the following steps:
OH--e-→·OH
the sodium hypochlorite indirect oxidation reaction process is as follows:
2Cl--2e-→Cl2(liq)
OH--e-→·OH
2Cl-+2·OH→Cl2(liq)+2OH-
Cl2(liq)+2OH-→Cl-+ClO-+H2O
the reactor cathode undergoes a reduction reaction as follows:
after oxidation and reduction reactions, pollutants such as COD, cyanide, ammonia nitrogen and the like in the wastewater are oxidized into small molecules such as carbon dioxide, nitrogen, water and the like, cyanide and complex compounds complete the processes of 'cyanide breaking' and 'complex breaking', and the pollutants such as heavy metal, nitrate nitrogen and the like are reduced into substances such as heavy metal simple substances, nitrogen and the like.
Compared with the prior art, the utility model provides a pair of electroplating effluent handles electrocatalytic oxidation device has realized following beneficial effect at least:
other electroplating wastewater treatment processes, in particular to a wastewater treatment process with poor biodegradability, which takes a Fenton oxidation method as a representative, the utility model has the following advantages. Compared with the Fenton oxidation method:
(1) the reaction condition is mild, strong acid or strong alkali is not needed, and the wastewater can directly enter an electrocatalytic oxidation reaction device without adjusting the pH value to oxidize or reduce the pollutants so as to achieve the purpose of removing the pollutants;
(2) ferrite, hydrogen peroxide and the like are not required to be consumed, acid and alkali added for frequently adjusting pH are not required to be consumed, the dosage of the added medicament is small, and the dependence of wastewater treatment on the medicament is reduced;
(3) the oxidability is strong, and almost all the pollutants removed from the wastewater are converted into carbon dioxide, water, nitrogen and other small molecules;
(4) a large amount of precipitable substances such as ferrous salt and the like do not need to be added, the sludge amount generated in the treatment process is greatly reduced, the sludge disposal cost is reduced, and the wastewater treatment cost is reduced;
(5) the electrocatalytic oxidation device can select various modes such as single, multiple series, multiple parallel, multilayer arrangement and the like according to the field condition, and has high equipment utilization rate and high site utilization rate;
(6) the control nodes of the electrocatalytic oxidation device mainly comprise parameters such as current and voltage, the number of the control nodes is small, and automation is easy to realize.
Of course, it is not necessary for any product of the present invention to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of an electrocatalytic oxidation apparatus for treating electroplating wastewater according to the present invention.
In the figure: 1-reactor box body, 2-electrode group, 3-power supply, 4-hoisting equipment, 101-shell, 102-sealing cover, 103-fixing bolt, 104-gasket, 105-water inlet, 106-water inlet sieve plate, 107-water outlet pipe, 108-water outlet, 109-air outlet, 110-sewage outlet, 111-supporting leg, 201-anode, 202-cathode, 203-limiting gasket, 204-anode connecting plate, 205-cathode connecting plate, 206-cable, 207-electrode bolt, 208-) bracket, 209-inner frame, 210-lifting lug, 211-insulating base plate, 301-high-power direct current power supply, 302-power supply anode, 303-power supply cathode, 401-guide rail, 402-electric hoist, 403-slings.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Example 1, as shown in FIG. 1, an electrocatalytic oxidation apparatus for electroplating wastewater treatment, comprising: the device comprises a reactor box body 1, an electrode group 2, a power supply 3 and hoisting equipment 4;
the electrode group 2 is arranged in the reactor box body 1;
the electrode group 2 is electrically connected with a power supply 3;
the hoisting device 4 is connected with the electrode group 2, and the hoisting device 4 is arranged above the reactor box body 1 and used for hoisting the electrode group 2.
Based on the embodiment, the wastewater enters the reactor box through pumping or gravity flow, 1, the power supply supplies power to the electrode group 2, the electrode group 2 removes pollutants such as COD, ammonia nitrogen, cyanide, total nitrogen and heavy metals in the wastewater through electrocatalytic oxidation, the cyanide completes the cyanide breaking process, the complex substances complete the complex breaking process, the COD, the ammonia nitrogen, the total nitrogen and the like are oxidized or reduced into small molecules such as water, carbon dioxide and nitrogen, the heavy metals are converted into free state or reduced into simple substances and flow out of the reactor box body 1, and the wastewater is continuously treated or directly discharged and recycled after reaching standards. When the equipment is stopped for maintenance, the hoisting equipment 4 hoists the electrode group 2, and cleaning or partial electrode plate replacement work is carried out according to the specific condition of the electrode group.
To further explain the present embodiment, it should be noted that the reactor tank 1 is connected with an external circulation pump through a pipeline; the number of the reactor boxes 1 is multiple, and the reactor boxes 1 are connected in series or in parallel. The device can select to configure an external circulating pump pipeline and a water pump according to the characteristics of the wastewater, and can select the arrangement modes of single operation, multistage series operation, multiple parallel operation and the like according to the characteristics of the wastewater
To further explain the present embodiment, it should be noted that the reactor box is composed of a shell 101, a cover 102, and legs 111; the cover 102 is fixedly connected with the shell 101 through a bolt 103 and sealed through a gasket 104; the shell 101 is provided with a water inlet 105, a water inlet sieve plate 106, a water outlet pipe 107, a water outlet 108, an air outlet 109 and a sewage outlet 110; the water inlet sieve plate 106 is arranged at the side of the water inlet 105; the water outlet pipe 107 is arranged at the water outlet 108 side. After the wastewater enters the reactor 1 through the water inlet, the wastewater is distributed through the water inlet sieve plate 106, so that the uniformity of water flow can be effectively improved, and the mixing is enhanced; the treated wastewater is collected by the water outlet pipe 107, and the wastewater can be collected at different positions, so that the nonuniformity of the discharged water is reduced, and the wastewater finally flows out; the gas generated in the electrocatalytic oxidation process flows out from the gas outlet, and the sewage generated when the equipment is shut down and cleaned flows out from the sewage outlet.
To further explain the present embodiment, it should be noted that the cover 102 is made of a transparent organic glass plate material, and the inside of the reactor can be directly observed.
To further explain the present embodiment, it should be noted that the water outlet pipe 107 is any one of a porous type, a mesh type and a straight flow type.
To further explain the present embodiment, it should be noted that the electrode group 2 is composed of an anode 201, a cathode 202, an anode connecting plate 204, a cathode connecting plate 205, and an inner frame 209;
the anode 201 and the cathode 202 are spaced and insulated by a limit gasket 203;
the anode 201 and the cathode 202 are respectively electrically connected with an anode connecting plate 204 and a cathode connecting plate 205 through cables 206 and are fixed through electrode bolts 207;
the anode connecting plate 204 and the cathode connecting plate 205 are placed on the bracket 208;
the anode 201 and the cathode 202 are integrally placed on an inner frame 209 and insulated from each other by an insulating gasket 211;
a lifting lug 210 is arranged on the inner frame 209 and used for lifting the whole electrode group, and the lifting lug 210 is arranged on a side plate of the inner frame 209;
the anode connecting plate 204 and the cathode connecting plate 205 are made of copper bars or aluminum bars; the bracket 208 is also made of copper bars or aluminum bars; the bracket 208 is fixed to the side wall of the reactor tank 1.
To further explain this embodiment, it should be noted that the anode 201 is an inert non-active electrode, and may be a titanium-based metal oxide composite electrode.
For further explanation of the present embodiment, it should be noted that the power supply 3 includes a high power dc power supply 301, a positive power supply 302, and a negative power supply 303, where the high power dc power supply 301 is used for converting ac power into dc power; the positive electrode 302 of the power supply is electrically connected with the anode connecting plate 204 and is fixed through an electrode bolt 207; the power supply cathode 303 is electrically connected with the cathode connecting plate 205 and is fixed through an electrode bolt 207; the high power dc power supply 301 is a fixed dc type or a pulsed dc type. The high-power direct-current power supply can be set into a fixed direct-current mode or a pulse direct-current mode according to the condition of wastewater, and if the high-power direct-current power supply is the fixed direct-current mode, the output current and the voltage are transient and stable; if the pulse direct current type is adopted, the output current and the voltage are changed in a pulse type, but the change of the anode and the cathode does not occur on the whole
For further explanation of the present embodiment, it should be noted that the hoisting device 4 includes a guide rail 401, an electric hoist 402, a sling 403; the guide rail 401 is fixed on the top of a factory building or a steel structure; the electric hoist 402 can move directionally on the guide rail 401; the suspension wire 403 is used for lifting the lifting lug 210 to move up and down.
To further explain the present embodiment, it should be noted that the reactor casing 1 and the lifting apparatus 4 are integrally insulated from the electrode assembly 2 and the power supply 3, and the spacing washer 203, the bracket 208, the inner frame 209, the lifting lug 210 of the electrode assembly 2 are insulated from the anode 201, the cathode 202, the anode connection plate 204, the cathode connection plate 205, the cable 206, and the electrode bolt 207, i.e. the connection point or the proximity point is provided with an insulating material.
According to the embodiment, the utility model provides a pair of electroplating effluent handles electricity catalytic oxidation device has realized following beneficial effect at least:
other electroplating wastewater treatment processes, in particular to a wastewater treatment process with poor biodegradability, which takes a Fenton oxidation method as a representative, the utility model has the following advantages. Compared with the Fenton oxidation method:
(1) the reaction condition is mild, strong acid or strong alkali is not needed, and the wastewater can directly enter an electrocatalytic oxidation reaction device without adjusting the pH value to oxidize or reduce the pollutants so as to achieve the purpose of removing the pollutants;
(2) ferrite, hydrogen peroxide and the like are not required to be consumed, acid and alkali added for frequently adjusting pH are not required to be consumed, the dosage of the added medicament is small, and the dependence of wastewater treatment on the medicament is reduced;
(3) the oxidability is strong, and almost all the pollutants removed from the wastewater are converted into carbon dioxide, water, nitrogen and other small molecules;
(4) a large amount of precipitable substances such as ferrous salt and the like do not need to be added, the sludge amount generated in the treatment process is greatly reduced, the sludge disposal cost is reduced, and the wastewater treatment cost is reduced;
(5) the electrocatalytic oxidation device can select various modes such as single, multiple series, multiple parallel, multilayer arrangement and the like according to the field condition, and has high equipment utilization rate and high site utilization rate;
(6) the control nodes of the electrocatalytic oxidation device mainly comprise parameters such as current and voltage, the number of the control nodes is small, and automation is easy to realize.
Of course, it is not necessary for any product of the present invention to achieve all of the above-described technical effects simultaneously.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. The utility model provides an electroplating effluent handles electrocatalytic oxidation device which characterized in that includes: the device comprises a reactor box body (1), an electrode group (2), a power supply (3) and hoisting equipment (4);
the electrode group (2) is arranged in the reactor box body (1);
the electrode group (2) is electrically connected with a power supply (3);
the lifting equipment (4) is connected with the electrode group (2), and the lifting equipment (4) is arranged above the reactor box body (1) and used for lifting the electrode group (2).
2. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 1,
the reactor box body (1) is connected with an external circulating pump through a pipeline;
the reactor box bodies (1) are multiple, and the multiple reactor box bodies (1) are connected in series or in parallel.
3. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 1,
the reactor box body consists of a shell (101), a sealing cover (102) and supporting legs (111);
the sealing cover (102) is fixedly connected with the shell (101) through a bolt (103) and sealed through a gasket (104);
the shell (101) is provided with a water inlet (105), a water inlet sieve plate (106), a water outlet pipe (107), a water outlet (108), a gas outlet (109) and a sewage outlet (110);
the water inlet sieve plate (106) is arranged on the side of the water inlet (105);
the water outlet pipe (107) is arranged at the side of the water outlet (108).
4. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 3,
the cover (102) is made of a transparent machine glass plate material.
5. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 3,
the water outlet pipe (107) is any one of a porous type, a sieve-hole type and a straight-flow type.
6. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 1,
the electrode group (2) consists of an anode (201), a cathode (202), an anode connecting plate (204), a cathode connecting plate (205) and an inner frame (209);
the anode (201) and the cathode (202) are spaced and insulated through a limiting gasket (203);
the anode (201) and the cathode (202) are respectively and electrically connected with an anode connecting plate (204) and a cathode connecting plate (205) through cables (206) and are fixed through electrode bolts (207);
the anode connecting plate (204) and the cathode connecting plate (205) are placed on the bracket (208);
the anode (201) and the cathode (202) are integrally placed on an inner frame (209) and are insulated from each other by an insulating pad (211);
a lifting lug (210) is arranged on the inner frame (209) and used for lifting the whole electrode group, and the lifting lug (210) is arranged on a side plate of the inner frame (209);
the anode connecting plate (204) and the cathode connecting plate (205) are made of copper bars or aluminum bars; the bracket (208) is also made of copper bars or aluminum bars; the bracket (208) is fixed on the side wall of the reactor box body (1).
7. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 1,
the anode (201) is an inert non-active electrode and can be a titanium-based metal oxide composite electrode.
8. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 6,
the power supply (3) comprises a high-power direct-current power supply (301), a power supply anode (302) and a power supply cathode (303), wherein the high-power direct-current power supply (301) is used for converting alternating current into direct current; the power supply positive electrode (302) is electrically connected with the anode connecting plate (204) and is fixed through an electrode bolt (207); the power supply negative electrode (303) is electrically connected with the cathode connecting plate (205) and is fixed through an electrode bolt (207);
the high-power direct-current power supply (301) is in a fixed direct-current mode or a pulse direct-current mode.
9. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 1,
the hoisting equipment (4) comprises a guide rail (401), an electric hoist (402) and a sling (403); the guide rail (401) is fixed to the top of a factory building or a steel structure; the electric hoist (402) can move directionally on the guide rail 401; the suspension cable (403) is used for lifting the lifting lug (210) to move up and down.
10. An electrocatalytic oxidation apparatus for electroplating wastewater treatment as set forth in claim 1,
the reactor box body (1), the hoisting equipment (4), the electrode group (2) and the power supply (3) are integrally insulated, the limiting gasket (203), the support (208), the inner frame (209), the lifting lug (210) of the electrode group (2), the anode (201), the cathode (202), the anode connecting plate (204), the cathode connecting plate (205), the cable (206) and the electrode bolt (207) are insulated from each other, and namely, the connecting part or the close part is provided with an insulating material.
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| CN109824124A (en) * | 2019-03-29 | 2019-05-31 | 江苏京源环保股份有限公司 | A kind of electroplating wastewater processing electrocatalysis oxidation apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109824124A (en) * | 2019-03-29 | 2019-05-31 | 江苏京源环保股份有限公司 | A kind of electroplating wastewater processing electrocatalysis oxidation apparatus |
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