A spiral three-dimensional electrocatalytic oxidation sewage treatment device

Abstract

The utility model discloses a spiral three-dimensional electrocatalytic oxidation sewage treatment device, including an electrocatalytic reaction tank, a grid box is arranged in the electrocatalytic reaction tank, an anode plate and a cathode plate are arranged vertically in the grid box, the anode plate and the cathode plate are respectively connected to the positive and negative poles of the power supply through electric wires, the anode plate and the cathode plate are spirally shaped, the anode plate is sleeved on the outside of the cathode plate to form a spiral groove between the anode plate and the cathode plate, a free third electrode is arranged in the spiral groove, a baffle is arranged at the port of the anode plate and the cathode plate, the baffle is lower than the anode plate and the cathode plate, an overflow port is formed above the baffle, and an ozone aeration device is also included, the ozone aeration device has a plurality of aeration holes, the plurality of aeration holes are located at the bottom of the spiral groove, a water inlet is arranged at the center of the spiral groove, and a water outlet is arranged at the upper part of the electrocatalytic reaction tank. The utility model utilizes a spiral structure to increase the specific surface area of ​​the catalytic oxidation reaction, can realize continuous water inlet and continuous treatment, and improve treatment efficiency.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to a spiral three-dimensional electrocatalytic oxidation sewage treatment device. Background Art

[0002] At present, the treatment of industrial wastewater containing high concentrations of difficult-to-degrade organic pollutants has always been a difficult problem that bothers everyone. Electrocatalytic oxidation technology is a technology that promotes the oxidation and decomposition of organic matter under the oxidation action of the electrode surface or the action of free radicals generated by the electric field. Recently, the method of using electrocatalytic oxidation technology to treat difficult-to-biodegrade organic wastewater has gradually attracted attention.

[0003] In the prior art, the positive and negative electrodes are installed in the catalytic tank in a fence arrangement. Generally, sewage is introduced into the treatment box through an inlet pipe. The sewage will pass through the electrodes quickly and has a short contact time with the electrodes, so it cannot fully react, thereby affecting the quality of organic sewage treatment. Utility Model Content

[0004] In view of the above-mentioned technical problems, the utility model proposes a spiral three-dimensional electrocatalytic oxidation sewage treatment device, which utilizes a spiral structure, is easy to install, reduces the distance between the anode and cathode plates, increases the reaction specific surface area, increases the residence time of sewage in the reactor and the time for reaction with the three-dimensional electrodes, improves the catalytic efficiency, and can achieve continuous water inlet without causing mixing of the inlet and outlet water.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a spiral three-dimensional electrocatalytic oxidation sewage treatment device, comprising an electrocatalytic reaction tank, a grid box is arranged in the electrocatalytic reaction tank, an anode plate and a cathode plate are vertically arranged in the grid box, the anode plate and the cathode plate are respectively connected to the positive and negative poles of the power supply through electric wires, the anode plate and the cathode plate are spirally shaped, the anode plate is sleeved on the outside of the cathode plate to form a spiral groove between the anode plate and the cathode plate, a free third electrode is arranged in the spiral groove, a baffle is arranged at the port portion of the anode plate and the cathode plate, the baffle is lower than the anode plate and the cathode plate to form an overflow port above the baffle, and also includes an ozone aeration device, the ozone aeration device has a plurality of aeration holes, the plurality of aeration holes are located at the bottom of the spiral groove, the aeration holes are spaced 3 to 6 cm apart, a water inlet is arranged at the center of the spiral groove, a water outlet is arranged at the upper part of the electrocatalytic reaction tank, the sewage is catalytically oxidized through the spiral groove, buffered outside the spiral groove through the overflow port, and then discharged from the electrocatalytic reaction tank through the water outlet.

[0006] Preferably, the bottom of the electrocatalytic reaction tank is paved with a porous adsorption material for adsorbing inorganic salt ions and insoluble particulate matter generated during the catalytic oxidation process, and the grid box is located on the porous adsorption material.

[0007] Preferably, the grid box is made of insulating material, and the bottom of the grid box is a flat plate, on which a spiral groove is provided for fixing the anode plate and the cathode plate.

[0008] Preferably, the grid box is made of any one of PMMA, PS, PP, PTFE or HDPE.

[0009] Preferably, the material of the anode plate and the cathode plate is Ti / RuO2, Ti / PbO2 or Ti / RuO2-S2O8 2- / Fe(Ⅱ), the groove width of the spiral groove is 0.5 to 5 cm.

[0010] Preferably, the output current of the power supply is alternating current to prevent plate passivation, and includes an output power supply, a transformer, and a rectifier, which can realize three mode switching of constant voltage, constant current, and electrode conversion, and the output current density is 5-90 mA / cm 2 .

[0011] Preferably, the third electrode is made of metal particles or activated carbon fiber clusters, which occupy 1 / 6 to 1 / 2 of the volume of the spiral groove space, and the size of the metal particles or activated carbon fiber clusters is larger than the grid size of the grid box.

[0012] Preferably, the metal particles are porous particles with carbon as the substrate and metal oxides loaded thereon, and the activated carbon fiber clusters are irregular clusters woven with carbon fibers as the substrate.

[0013] Preferably, the aeration device further comprises an ozone pump located outside the electrocatalytic reaction tank, and a connecting pipe connected to the ozone pump, wherein the connecting pipe is connected to the aeration hole through a branch pipe, and an ozone aerator is installed on the aeration hole.

[0014] Preferably, the height of the water outlet is lower than the height of the overflow outlet.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are: the spiral structure is utilized, which is easy to install, reduces the distance between the anode and cathode plates, increases the specific surface area of ​​the catalytic oxidation reaction, and greatly improves the sewage treatment effect; the sewage passes through the spiral three-dimensional electrode at a slow rate, which increases the residence time of the sewage in the reactor and the time of the catalytic oxidation reaction with the three-dimensional electrode, thereby improving the catalytic efficiency; the sewage inlet and outlet do not mix with each other, and continuous water inlet and continuous treatment can be achieved, without causing the sewage inlet and outlet to mix, thereby reducing the effluent water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the top view of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the front view of the utility model;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] In the above figures: 1. electrocatalytic reaction tank; 2. three-dimensional electrocatalytic device; 2-1. anode plate; 2-2. cathode plate; 2-3. third electrode; 2-4. grid box; 3. power supply; 4. ozone aeration device; 4-1. ozone aerator; 4-2. ozone pump; 4-3. branch pipe; 4-4. connecting pipe; 5. water inlet device; 5-1. water inlet; 5-2. water pump; 6. water outlet; 7. porous adsorption material; 8. baffle; 8-1. overflow port; 9. spiral groove. DETAILED DESCRIPTION

[0021] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0022] A spiral three-dimensional electrocatalytic oxidation sewage treatment device, see Figure 1-3 , comprising an electrocatalytic reaction tank 1, which is a square tank, and a porous adsorption material 7 is laid on the bottom of the electrocatalytic reaction tank 1. The porous adsorption material 7 can be activated carbon particles, ceramsite or other porous materials, and is used to adsorb inorganic salt ions and insoluble particles generated during catalytic oxidation;

[0023] A grid box 2-4 is provided in the electrocatalytic reaction tank 1. The grid box 2-4 is located on the porous adsorption material 7. The grid box 2-4 is made of insulating material. The material of the grid box 2-4 is any one of PMMA, PS, PP, PTFE or HDPE. In this embodiment, the material of the grid box 2-4 is PP. The bottom of the grid box 2-4 is a whole flat plate, and two sleeve-shaped spiral card slots are provided on the flat plate.

[0024] The grid box is vertically provided with an anode plate 2-1 and a cathode plate 2-2, and the material of the anode plate 2-1 and the cathode plate 2-2 is Ti / RuO2, Ti / PbO2 or Ti / RuO2-S2O8. 2- / Fe(Ⅱ), in this embodiment, the material of the anode plate 2-1 and the cathode plate 2-2 is Ti / PbO2, the anode plate 2-1 and the cathode plate 2-2 are respectively connected to the positive and negative electrodes of the power supply 3 through wires, the output current of the power supply 3 is alternating current, and the three modes of constant voltage, constant current and electrode conversion can be switched to prevent the plate from passivation, and the output current density is 60mA / cm 2 ;

[0025] The anode plate 2-1 and the cathode plate 2-2 are fixed on the card slot of the grid box 2-4 so that the anode plate 2-1 and the cathode plate 2-2 are spirally shaped, and the anode plate 2-1 is sleeved on the outside of the cathode plate 2-2 to form a spiral groove 9 between the anode plate 2-1 and the cathode plate 2-2. The groove width of the spiral groove 9 is 1.5 cm. The spiral structure is convenient for installation, reduces the distance between the anode and cathode plates, increases the specific surface area of ​​the catalytic oxidation reaction, and greatly improves the sewage treatment effect;

[0026] A free third electrode 2-3 is arranged in the spiral groove 9. When sewage enters the spiral groove 9, the third electrode 2-3 can move in the spiral groove 9. The third electrode 2-3 is made of metal particles or activated carbon fiber clusters. The size of the metal particles or activated carbon fiber clusters is larger than the mesh size of the mesh box. The metal particles are porous particles with carbon as the substrate and metal oxides loaded thereon. The activated carbon fiber clusters are irregular clusters woven with carbon fibers as the substrate.

[0027] In this embodiment, the third electrode 2-3 uses an activated carbon fiber mass, which occupies 1 / 3 of the volume of the spiral groove 9. The size of the activated carbon fiber mass is larger than the mesh size of the mesh box 2-4. The activated carbon fiber mass is an irregular mass woven with carbon fiber as the base material. The sewage passes through the spiral three-dimensional electrode 2-3 at a slow speed, which increases the residence time of the sewage in the reactor and the time of the catalytic oxidation reaction with the three-dimensional electrode 2-3, thereby improving the catalytic efficiency.

[0028] A baffle 8 is provided at the port of the anode plate 2-1 and the cathode plate 2-2. The height of the baffle 8 is lower than that of the anode plate 2-1 and the cathode plate 2-2, so as to form an overflow port 8-1 above the baffle 8.

[0029] The ozone aeration device 4 for generating bubble movement is also included. The ozone aeration device 4 has a plurality of aeration holes. The plurality of aeration holes are located at the bottom of the spiral groove 9. The interval between two adjacent aeration holes is 3 to 6 cm. The ozone aeration device 4 also includes an ozone pump 4-2 located outside the electrocatalytic reaction tank 1, and a connecting pipe 4-4 connected to the ozone pump 4-2. The connecting pipe 4-4 is connected to the aeration hole through a branch pipe 4-3. An ozone aerator 4-1 is installed on the aeration hole.

[0030] A water inlet 5-1 is provided at the center of the spiral groove 9, and also includes a water pump 5-2 connected by a water inlet pipe, so as to form a sewage inlet device 5. A water outlet 6 is provided on the upper groove wall of the electrocatalytic reaction tank 1, and the height of the water outlet 6 is lower than the height of the overflow port 8-1. The sewage passes through the spiral groove 9 for catalytic oxidation, is buffered outside the spiral groove 9 through the overflow port 8-1, and is discharged from the electrocatalytic reaction tank 1 through the water outlet 6. The device can achieve more than 90% COD removal, and the sewage inlet and outlet are not mixed with each other, so that continuous water inlet and continuous treatment can be achieved, and the sewage inlet and outlet will not be mixed, thereby reducing the water quality of the outlet.

[0031] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A spiral three-dimensional electrocatalytic oxidation sewage treatment device, characterized in that: The invention comprises an electrocatalytic reaction tank, wherein a grid box is arranged in the electrocatalytic reaction tank, and an anode plate and a cathode plate are arranged vertically in the grid box, wherein the anode plate and the cathode plate are respectively connected to the positive and negative poles of a power source through electric wires, and the anode plate and the cathode plate are spirally shaped, and the anode plate is sleeved on the outer side of the cathode plate to form a spiral groove between the anode plate and the cathode plate, and a free third electrode is arranged in the spiral groove, and baffles are arranged at the ports of the anode plate and the cathode plate, and the baffles are lower than the anode plate and the cathode plate to form an overflow port above the baffles, and an ozone aeration device is also included, and the ozone aeration device has a plurality of aeration holes, and the plurality of aeration holes are located at the bottom of the spiral groove, and a water inlet is arranged at the center of the spiral groove, and a water outlet is arranged at the upper part of the electrocatalytic reaction tank.

2. A spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 1, characterized in that: The bottom of the electrocatalytic reaction tank is paved with porous adsorption material, and the grid box is located on the porous adsorption material.

3. The spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 1 is characterized by: The grid box is made of insulating material, and the bottom of the grid box is a flat plate. The flat plate is provided with spiral grooves for fixing the anode plate and the cathode plate.

4. A spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 3, characterized in that: The material of the grid box is any one of PMMA, PS, PP, PTFE or HDPE.

5. The spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 1 is characterized by: The material of the anode plate and cathode plate is Ti / RuO2, Ti / PbO2 or Ti / RuO2-S2O8 2- / Fe(Ⅱ), the groove width of the spiral groove is 0.5 to 5 cm.

6. The spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 1 is characterized by: The output current of the power supply is alternating current, and the output current density is 5-90 mA / cm 2 .

7. The spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 1 is characterized by: The third electrode is made of metal particles or activated carbon fiber clusters, and the size of the metal particles or activated carbon fiber clusters is larger than the grid size of the grid box.

8. The spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 7 is characterized by: The metal particles are porous particles with carbon as the substrate and metal oxides loaded thereon, and the activated carbon fiber clusters are irregular clusters woven with carbon fibers as the substrate.

9. The spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 1 is characterized by: The ozone aeration device also includes an ozone pump located outside the electrocatalytic reaction tank, and a connecting pipe connected to the ozone pump. The connecting pipe is connected to the aeration hole through a branch pipe, and an ozone aerator is installed on the aeration hole.

10. The spiral three-dimensional electrocatalytic oxidation sewage treatment device according to claim 1, characterized in that: The height of the water outlet is lower than that of the overflow outlet.

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