CN211946390U - Electrocatalytic oxidation device for wastewater COD degradation - Google Patents
Electrocatalytic oxidation device for wastewater COD degradation Download PDFInfo
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- CN211946390U CN211946390U CN201922079447.3U CN201922079447U CN211946390U CN 211946390 U CN211946390 U CN 211946390U CN 201922079447 U CN201922079447 U CN 201922079447U CN 211946390 U CN211946390 U CN 211946390U
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Abstract
An electrocatalytic oxidation device for the degradation of wastewater COD comprising: the two ends of the reaction tank are respectively provided with a water inlet valve and a water production valve; the cathode plates are vertically arranged in parallel; the anode plates are arranged among the cathode plates in a plurality; the power supply cabinet is provided with a positive pole and a negative pole which are respectively and electrically connected with the negative plate and the positive plate; the waste water enters the reaction tank from the water inlet valve, flows upwards to penetrate through the top of one part of the cathode plate, flows downwards to penetrate through the bottom of the other part of the cathode plate, and is discharged from the water production valve after horizontally penetrating through the anode plate. With the above structure, the wastewater horizontally penetrates from the anode plate after passing through the top or bottom of the cathode plate by flowing upward or downward before entering the reaction tank. Therefore, the contact area and the contact time of the wastewater with the cathode plate and the anode plate can be increased, the COD degradation efficiency is improved, and the energy consumption is reduced.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an electrocatalytic oxidation device for wastewater COD degradation.
Background
With the increasingly severe environmental protection situation, the realization of zero discharge of wastewater becomes a necessary condition for sustainable development of enterprises. In recent years, wastewater zero-discharge projects are built and gradually put into use, and problems in the zero-discharge process begin to be exposed, such as pollution of high-concentration brine to a membrane, poor quality of salt generated by evaporation and crystallization, incapability of resource utilization and the like.
The electrochemical water treatment technology is an efficient, clean and environment-friendly water treatment technology, is more and more emphasized due to the advantages of multiple selectable polar plate types, no need of adding chemical agents, good controllability of working conditions, strong adaptability of water quality and the like, and is deeply researched, popularized and applied. The electrochemical catalytic oxidation technology can remove organic pollutants in the wastewater only by adding a certain electric field, and based on the function, the technology can meet the huge application market in the field of wastewater zero discharge.
However, the electrochemical device for treating organic pollutant wastewater is not widely accepted at present, mainly because of low treatment efficiency and high energy consumption. The factors influencing the efficiency of the electrochemical catalytic oxidation are many, and the main reasons are two, 1, the selection of the anode plate substrate and the surface coating; and 2, whether the internal structural design of the device is reasonable or not. Regarding the research on the anode plate substrate and the surface coating, a great deal of research work is being done or has been done by domestic research institutes or colleges. However, how to optimize the internal structure of the device to improve the processing efficiency and reduce the energy consumption is the focus of the current research.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide an electrocatalytic oxidation apparatus for wastewater COD degradation, so as to improve the treatment efficiency and reduce the energy consumption.
The invention provides an electrocatalytic oxidation device for wastewater COD degradation, which is characterized by comprising the following components: the two ends of the reaction tank are respectively provided with a water inlet valve and a water production valve; the cathode plates are vertically arranged in parallel; the anode plates are arranged among the cathode plates in a plurality; the power supply cabinet is provided with a positive pole and a negative pole which are respectively and electrically connected with the negative plate and the positive plate; the waste water enters the reaction tank from the water inlet valve, flows upwards to penetrate through the top of one part of the cathode plate, flows downwards to penetrate through the bottom of the other part of the cathode plate, and is discharged from the water production valve after horizontally penetrating through the anode plate.
With the above structure, the wastewater horizontally penetrates from the anode plate after passing through the top or bottom of the cathode plate by flowing upward or downward before entering the reaction tank. Therefore, the contact area and the contact time of the wastewater with the cathode plate and the anode plate can be increased, the COD degradation efficiency is improved, and the energy consumption is reduced.
According to the invention, preferably, two sides of the cathode plate are connected with the reaction tank; the bottom of part of the cathode plate is connected with the bottom of the reaction tank; the bottom of the other part of the cathode plate is higher than the bottom of the reaction tank, and the top of the other part of the cathode plate is higher than the tops of the other cathode plates; so that the waste water passes through the top of one part of the cathode plate and the bottom of the other part of the cathode plate.
With the above structure, a specific way for enabling the wastewater to pass through the top of one part of the cathode plate and the bottom of the other part of the cathode plate is provided. Two sides of part of the cathode plate are connected with the reaction tank, and when the bottom of the cathode plate is connected with the reaction tank, the wastewater can only cross the top of the cathode plate; the bottom of the cathode plate is higher than the bottom of the reaction tank, and when the top of the cathode plate is higher than the tops of other cathode plates, the waste water can only pass through the bottom of the cathode plate. Simple structure and easy realization.
In the present invention, it is preferred that the passage of wastewater from the top of the cathode plate alternates with the passage from the bottom of the cathode plate to effect upward flow through the top of a portion of the cathode plate and downward flow through the bottom of another portion of the cathode plate.
By adopting the structure, the distance and the time of the wastewater flowing in the reaction tank can be longest by alternately passing the wastewater from the top of the cathode plate and passing the wastewater from the bottom of the cathode plate, so that the contact time and the contact area of the wastewater with the cathode plate and the anode plate can be improved, the treatment efficiency of COD degradation is further improved, and the energy consumption is reduced.
According to the invention, the anode plate is preferably in a net shape or a porous shape, and two sides and the bottom of the anode plate are connected with the reaction tank, so that the wastewater can horizontally penetrate through the anode plate.
With the structure, a specific mode for realizing horizontal penetration of wastewater from the anode plate is provided. The two sides and the bottom of the anode plate are connected with the reaction tank, the wastewater penetrates through the anode plate through the net-shaped and porous structure of the anode plate and contacts with the anode plate to generate electrolysis in the penetration process, so that the contact area is increased, the treatment efficiency of COD degradation is further improved, and the energy consumption is reduced.
According to the invention, the position connected with the reaction tank is sealed by an insulating sealing strip.
By adopting the structure, the anode plate and the cathode plate are prevented from being short-circuited, and the energy consumption is reduced.
According to the invention, the anode plate is preferably made of metals such as titanium and lead, the surface of which is coated with special metals or metal oxides with good conductivity; the cathode plate is made of metals such as stainless steel, iron, aluminum and the like.
By adopting the structure, the preferable materials of the anode plate and the cathode plate are provided, so that the electrical conductivity of the cathode plate and the anode plate is improved, and the treatment efficiency of COD degradation is improved.
According to the invention, the reaction tank is preferably made of an insulating material.
By adopting the structure, the safety of the operation of the electrocatalytic oxidation device is ensured, and the occurrence of electric shock is prevented.
The invention preferably also comprises a copper bar, comprising: the two electric plates are arranged on the outer side of the reaction tank and connected with the two poles of the power supply cabinet; the two electric connecting plates are provided with a plurality of connecting plates; the connecting plate on one connecting plate is connected with the anode plate, and the connecting plate on the other connecting plate is connected with the cathode plate; so as to realize that the power supply cabinet is respectively and electrically connected with the cathode plate and the anode plate.
Adopt as above structure, be connected with anode plate, negative plate respectively through the copper bar that sets up in the reaction tank both sides, can effectively prevent the emergence of short circuit, guaranteed the safe operation of electrocatalytic oxidation device.
In the invention, preferably, the bottom of the reaction tank is also provided with a precipitation bin for collecting precipitates.
Preferably, the reaction tank is also provided with a drain valve for discharging sediments in the sedimentation bin.
By adopting the structure, the bottom of the reaction tank is provided with the precipitation bin for collecting precipitates generated in the electrolytic process, thereby preventing the precipitates from blocking the reaction tank and ensuring the smooth proceeding of electrolysis.
Drawings
FIG. 1 is a schematic structural view of an electrocatalytic oxidation apparatus according to the present application;
FIG. 2 is a schematic structural diagram of the anode plate of FIG. 1;
FIG. 3 is a schematic view of the construction of the cathode plate of FIG. 1;
FIG. 4 is a schematic view of the wastewater flow direction in the top direction of FIG. 1;
FIG. 5 is a schematic view of the wastewater flow direction reversed from the front side of FIG. 1.
Description of the figures
A reaction tank 1; a water inlet valve 11; a water production valve 12; a blowoff valve 13; a settling bin 14; a cathode plate 2; a cathode terminal 21; an anode plate 3; an anode terminal 31; a copper bar 4; a power receiving plate 41; connecting plate 42
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the drawings.
FIG. 1 is a schematic structural diagram of an electrocatalytic oxidation apparatus according to the present application. As shown in figure 1, the electrocatalytic oxidation device is composed of a reaction tank 1, a cathode plate 2, an anode plate 3, a copper bar 4 and a power supply cabinet (not shown in the figure). Wherein, the reaction tank 1 is a rectangular tank with an opening at the top; a water inlet valve 11 is arranged at the middle position of the upper part of the left side of the reaction tank 1, a water producing valve 12 is arranged at the middle position of the upper part of the right side of the reaction tank 1, and a drain valve 13 is arranged at the middle position of the bottom of the right side of the reaction tank 1. The reaction tank 1 is internally and uniformly and alternately vertically provided with anode plates 3 and cathode plates 2, and the left end and the right end of each of the anode plates 3 and the cathode plates 2 are respectively attached to the front side and the rear side inside the reaction tank 1. The front side and the rear side of the outside of the reaction tank 1 are respectively and horizontally provided with a copper bar 4, the copper bar 4 is provided with a rectangular plate-shaped electric connection plate 41, the electric connection plates 41 are horizontally arranged on the front side and the rear side of the reaction tank 1, the right end of the electric connection plate 41 extends to the right side face of the reaction tank 1, and the left end of the electric connection plate extends out of the left side face of the reaction tank 1; a plurality of connecting plates 42 are uniformly arranged at the top of the electric connection plate 41, the connecting plates 42 are arranged in an inverted L shape, and extend upwards from the top of the electric connection plate 41 to the upper part of the reaction tank 1 and then are bent towards the upper part of the opening of the reaction tank 1; wherein, the connecting plates 42 of the front copper bar 4 are respectively connected with the anode plate 3, and the connecting plates 42 of the rear copper bar 4 are respectively connected with the cathode plate 2; the front side copper bar 4 and the rear side copper bar 4 are respectively connected with the anode and the cathode of the power cabinet. In addition, the reaction tank 1 is made of an insulating material, such as polypropylene (PP), Polyethylene (PE), polyvinyl chloride (PVC), and the like.
Fig. 2 is a schematic structural view of the anode plate 3 in fig. 1. Fig. 3 is a schematic view of the construction of the cathode plate 2 of fig. 1. As shown in fig. 1, 2 and 3, the anode plate 3 and the cathode plate 2 are both square, and a cathode terminal 21 is arranged at one side of the top of the cathode plate 2 near the end position, an anode terminal 31 is arranged at the other side of the top of the anode plate 3 near the end position, and the anode plate 3 and the cathode plate 2 are respectively and fixedly connected with a connecting plate 42 of a copper bar 4 connected with the anode and the cathode of a corresponding power cabinet through the anode terminal 31 and the cathode terminal 21. In addition, the edges of the anode plate 3 and the cathode plate 2 close to the two ends of the tank wall are sealed by insulating sealing belts to prevent short circuit; the anode plate 3 is different from the cathode plate 2 in that the anode plate 3 is net-shaped or porous, and is made of titanium with the surface coated with special metal or metal oxide with good conductivity; the cathode plate 2 is flat plate-shaped and is made of stainless steel.
FIG. 4 is a schematic view of the wastewater flow direction in the top direction of FIG. 1. FIG. 5 is a schematic view of the wastewater flow direction reversed from the front side of FIG. 1. As shown in fig. 4 and 5, in the cathode plates 2 on both sides of the anode plate 3, the bottom and both sides of one cathode plate 2 are connected to the bottom and both sides of the interior of the reaction tank 1; the two sides of one cathode plate 2 are connected with the two sides of the interior of the reaction tank 1, the bottom of the reaction tank 1 and the bottom of the reaction tank 1 are higher than the bottom of the reaction tank 1, and the top of the reaction tank is higher than the tops of the anode plate 3 and the other cathode plate 2.
Based on the arrangement mode of the cathode plate 2 and the anode plate 3, the flowing mode of the wastewater in the reaction tank 1 is as follows: after wastewater is discharged into the reaction tank 1 from the water inlet valve 11, the wastewater contacts the cathode plate 2 with the bottom connected with the bottom of the reaction tank 1 to form upward vertical flow, the wastewater overflowing the cathode plate 2 from the top of the cathode plate 2 penetrates through the mesh-shaped or hole-shaped gaps of the anode plate 3 horizontally, the wastewater penetrating the anode plate 3 can only penetrate through the bottom of the next cathode plate 2 to form downward vertical flow, and then the wastewater penetrates through the next anode plate 3 horizontally to form upward vertical flow and overflows from the top of the cathode plate 2. According to this rule, the wastewater flows between the electrolytic plates in the reaction cell 1 for electrolysis and is discharged from the water production valve 12 after the electrolysis is completed.
In addition, as shown in fig. 1 and 5, a settling bin 14 is provided in the bottom of the reaction tank 1, the top of the settling bin 14 is connected to the bottom of the reaction tank 1 through a settling port that can be opened and closed, and the end of the settling bin 14 is provided with the above-mentioned drain valve 13. When the sediment at the bottom of the reaction tank is excessive, the sediment port is opened to allow the sediment to enter the sediment bin 14 and then be discharged through the drain valve 13.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An electrocatalytic oxidation apparatus for the degradation of wastewater COD, comprising:
the two ends of the reaction tank are respectively provided with a water inlet valve and a water production valve;
the cathode plates are vertically arranged in parallel;
the anode plates are arranged among the cathode plates in a plurality;
the power supply cabinet is provided with a positive pole and a negative pole which are respectively and electrically connected with the negative plate and the positive plate;
the waste water enters the reaction tank from the water inlet valve, flows upwards to penetrate through the top of one part of the cathode plate, flows downwards to penetrate through the bottom of the other part of the cathode plate, and is discharged from the water production valve after horizontally penetrating through the anode plate.
2. The electrocatalytic oxidation apparatus for wastewater COD degradation according to claim 1, wherein both sides of said cathode plate are connected with a reaction cell; the bottom of part of the cathode plate is connected with the bottom of the reaction tank; the bottom of the other part of the cathode plate is higher than the bottom of the reaction tank, and the top of the other part of the cathode plate is higher than the tops of the other cathode plates; so that the waste water passes through the top of one part of the cathode plate and the bottom of the other part of the cathode plate.
3. The electrocatalytic oxidation apparatus for wastewater COD degradation according to claim 2, wherein the cathode plates connected to the bottom of the reaction tank are alternately arranged with the cathode plates having the bottom higher than the bottom of the reaction tank.
4. The electrocatalytic oxidation apparatus for wastewater COD degradation according to claim 1, wherein said anode plate is mesh-shaped or porous, and both sides and bottom of the anode plate are connected to the reaction tank to achieve horizontal penetration of said wastewater from the anode plate.
5. The electrocatalytic oxidation apparatus for wastewater COD degradation according to claim 3 or 4, wherein the position connected with the reaction tank is sealed by an insulating sealing tape.
6. The electrocatalytic oxidation device for wastewater COD degradation according to claim 1, wherein the anode plate is made of titanium or lead, and the surface of the anode plate is coated with metal or metal oxide with good conductivity; the cathode plate is made of stainless steel, iron or aluminum.
7. The electrocatalytic oxidation apparatus for wastewater COD degradation according to claim 1, wherein said reaction cell is made of an insulating material.
8. The electrocatalytic oxidation device for wastewater COD degradation according to claim 1, further comprising copper bars comprising: the two electric plates are arranged on the outer side of the reaction tank and connected with the two poles of the power supply cabinet; the two electric connecting plates are provided with a plurality of connecting plates; the connecting plate on one connecting plate is connected with the anode plate, and the connecting plate on the other connecting plate is connected with the cathode plate; so as to realize that the power supply cabinet is respectively and electrically connected with the cathode plate and the anode plate.
9. The electrocatalytic oxidation apparatus for wastewater COD degradation according to claim 1, wherein a settling bin for collecting the precipitate is further provided at the bottom of the reaction tank.
10. The electrocatalytic oxidation apparatus for wastewater COD degradation according to claim 9, wherein said reaction tank is further provided with a blowoff valve for discharging the precipitate in the precipitation bin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922079447.3U CN211946390U (en) | 2019-11-27 | 2019-11-27 | Electrocatalytic oxidation device for wastewater COD degradation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922079447.3U CN211946390U (en) | 2019-11-27 | 2019-11-27 | Electrocatalytic oxidation device for wastewater COD degradation |
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| CN211946390U true CN211946390U (en) | 2020-11-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113003666A (en) * | 2021-04-01 | 2021-06-22 | 山东国舜环保设备有限公司 | Electrochemical wastewater treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113003666A (en) * | 2021-04-01 | 2021-06-22 | 山东国舜环保设备有限公司 | Electrochemical wastewater treatment device |
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