Sewage electro-catalysis purification device

Abstract

The invention belongs to the field of sewage treatment, and particularly relates to a sewage electro-catalysis purification device which comprises an oxidation tank, a water inlet pipe is fixedly connected to the bottom of the oxidation tank, a water outlet pipe is fixedly connected to the side face of the oxidation tank, two sets of supports are fixedly connected to the inner side wall of the oxidation tank, a set of cathode plates and a set of anode plates are fixedly connected to the supports and are arranged in a staggered mode, and the water inlet pipe is located below the cathode plates and the anode plates. A sewage flowing channel is formed between every two adjacent cathode plates and anode plates, during use, sewage is fed into the oxidation tank through the water inlet pipe and flows through the sewage flowing channels between the anode plates and the cathode plates, the sewage subjected to catalytic treatment is discharged from the water outlet, and through an electrocatalytic oxidation technology, under the action of an external electric field, the sewage is discharged into the oxidation tank through the water inlet pipe. The technology of efficiently purifying pollutants in water is achieved through physical and chemical actions, and no chemical agent is added except an electric field, so that the use of the chemical agent is reduced.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to a sewage electrocatalytic purification device. Background Art

[0002] Wastewater treatment is the process of removing pollutants from wastewater through physical, chemical, and biological methods to make it meet discharge or reuse standards;

[0003] According to the treatment depth, it can be divided into three levels: primary treatment (physical treatment) mainly removes suspended solids and coarse particles, and commonly uses physical methods such as screens, grit chambers, and primary sedimentation tanks, which can remove about 30% of BOD and more than 50% of suspended solids;

[0004] Secondary treatment (biological treatment) focuses on degrading dissolved organic matter. Through biochemical treatment technologies such as activated sludge process (such as SBR, oxidation ditch) and biofilm process (such as biological filter, contact oxidation), the BOD removal rate can reach over 90%.

[0005] The tertiary treatment (deep treatment) targets pollutants such as refractory organic matter, nitrogen and phosphorus, and uses technologies such as chemical precipitation, activated carbon adsorption, reverse osmosis, and ozone oxidation to further purify the water.

[0006] However, the existing sewage treatment method generally uses chemical agents to purify the sewage, but it is easy to cause secondary pollution. Therefore, to address the above problem, a sewage electrocatalytic purification device is proposed. Summary of the Invention

[0007] In order to remedy the deficiencies of the prior art and solve at least one of the technical problems raised in the background art, the present invention proposes a sewage electrocatalytic purification device.

[0008] The technical solution adopted by the present invention to solve its technical problems is: the sewage electrocatalytic purification device described in the present invention includes an oxidation tank; a water inlet pipe is fixedly connected to the bottom of the oxidation tank, a water outlet pipe is fixedly connected to the side of the oxidation tank, two groups of brackets are fixedly connected to the inner wall of the oxidation tank, a group of cathode plates and a group of anode plates are fixedly connected to the brackets, the cathode plates and the anode plates are staggered, the water inlet pipe is located below the cathode plates and the anode plates, and a sewage flow channel is formed between adjacent cathode plates and anode plates. Through electrocatalytic oxidation technology, it achieves high-efficiency purification of pollutants in water through physical and chemical effects under the action of an external electric field, and almost no chemical agents are added except for the external electric field, thereby reducing the use of chemical agents.

[0009] Preferably, the top of the oxidation tank is rotatably connected to a plurality of rotating shafts, the rotating shafts are located above the sewage flow channel, a pulley is fixed to the rotating shaft, a pull rope is fixed to the pulley, the bottom end of the pull rope is fixed to a hanger, the hanger is located in the sewage flow channel, scrapers are fixed on both sides of the hanger, the scrapers on both sides of the hanger are respectively fitted and slidably matched with the surfaces of the cathode plate and the anode plate, a motor is fixed to the oxidation tank, and the output end of the motor is transmission-connected to the rotating shaft, and during the downward movement of the hanger, the scrapers fit and scrape the cathode plate and the anode plate, thereby cleaning the cathode plate and removing the deposits on its surface, thereby reducing the influence of the deposits on the electrocatalytic oxidation reaction after long-term use.

[0010] Preferably, two pairs of supports are fixedly connected to the hanger, and two pairs of supports are provided with two brush rollers, and the two brush rollers are respectively located on both sides of the hanger, and the brush rollers are located on the sides of the scraper bar; during the movement of the hanger, the bristles on the brush rollers contact and brush the cathode plate or the anode plate, and the cathode plate or the anode plate can be brushed by means of the brush rollers to remove the deposits on the surface of the cathode plate and the anode plate, thereby improving the cleaning effect.

[0011] Preferably, both ends of the hanger are fixed with sliding seats, and sliding rails are fixed at corresponding positions of the inner wall of the oxidation tank and the sliding seat. The sliding seat and the slide rails are slidably connected. The sliding seat is fixed on the side of the hanger, and the inner wall of the oxidation tank is fixed with a slide rail that is slidably connected to the sliding seat. The slide rails can guide the sliding seat, thereby improving the stability of the hanger's up and down movement.

[0012] Preferably, the end of the brush roller is fixedly connected to a support shaft, the support shaft passes through the support and is rotatably connected thereto, a bearing is installed at the rotational connection between the support shaft and the support, the end of the support shaft is fixedly connected to a friction wheel, the surface of the friction wheel is provided with anti-slip grooves, the friction wheel is located on the side of the bracket, the surface of the friction wheel is provided with anti-slip grooves, and the friction wheel rolls on the side of the bracket to perform friction rolling.

[0013] Preferably, a friction plate is fixedly connected to the side of the bracket and the corresponding position of the friction wheel. The friction plate is located on the side of the friction wheel. The bracket is provided with a friction plate, and the surface of the friction plate is made of rubber material, which is used to reduce the slipping of the friction wheel.

[0014] Preferably, a support plate is bolted to the top of the hanger, and a counterweight is fixed to the top of the support plate. By bolting the support plate to the top of the hanger and fixing the counterweight on the support plate, the weight of the hanger can be increased, thereby facilitating the downward movement of the hanger.

[0015] Preferably, the water inlet pipe includes a water delivery roller and multiple water distribution pipes, the water delivery pipe is fixedly connected to the bottom of the oxidation tank, the water distribution pipe is fixedly connected to the water delivery pipe, the water distribution pipe is located below the sewage flow channel, and multiple water outlets are provided on the top of the water distribution pipe. The water inlet pipe is composed of a delivery roller and a water distribution roller, and its water distribution pipe is located below the sewage flow channel, so that the sewage can be easily and evenly delivered into the sewage flow channel.

[0016] Preferably, a gas collecting hood is fixedly connected to the top of the oxidation tank, an exhaust pipe is fixedly connected to the top of the gas collecting hood, and the gas collecting hood is arranged in a structure that is small at the top and large at the bottom.

[0017] Preferably, the anode plate comprises a titanium metal substrate, a titanium suboxide intermediate transition layer and a surface metal catalyst layer.

[0018] The present invention is beneficial in that:

[0019] 1. The present invention comprises an oxidation tank, an inlet pipe, an outlet pipe, an anode plate, a bracket, and a cathode plate. When in use, sewage is fed into the oxidation tank through the inlet pipe, flows through the sewage flow channel between the anode plate and the cathode plate, and is discharged from the outlet after catalytic treatment. The electrocatalytic oxidation technology achieves high-efficiency purification of pollutants in water through physical and chemical reactions under the action of an external electric field, and almost no chemical agents are added except for the applied electric field, thereby reducing the use of chemical agents.

[0020] 2. The present invention sets a rotating shaft, a pulley, a pull rope, a hanger, a scraper and a motor. Over a long period of time, the surface of the electrode plate will have deposits, and these deposits will affect the electrocatalytic reaction. Therefore, a rotating shaft is installed above the oxidation tank, and the rotating shaft is driven by the motor. The motor and the rotating shaft are connected by a chain sprocket, a gear set or a belt drive, so as to drive the rotating shaft and the pulley to rotate and reel in the pull rope. The unwinding of the pull rope causes the hanger to move downward. During the downward movement of the hanger, the scraper and the cathode plate and the anode plate are scraped together to clean the cathode plate and remove the deposits on its surface, thereby reducing the impact of the deposits on the electrocatalytic oxidation reaction after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 Schematic diagram of the water outlet pipe structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the oxidation tank of the present invention;

[0025] Figure 4 Schematic diagram of the cathode plate and anode plate structure of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the hanger of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the water distribution pipe of the present invention.

[0028] In the figure: 11, oxidation tank; 12, water inlet pipe; 13, water outlet pipe; 14, bracket; 15, anode plate; 16, cathode plate; 21, motor; 22, rotating shaft; 23, pulley; 24, pull rope; 25, hanger; 26, scraper; 31, support; 32, brush roller; 41, slide rail; 42, sliding seat; 51, support shaft; 52, friction wheel; 6, friction plate; 71, support plate; 72, counterweight; 81, water pipe; 82, water distribution pipe; 83, water outlet; 91, gas collecting hood; 92, exhaust pipe. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Specific examples are given below.

[0031] See also Figure 1-6 As shown, a sewage electrocatalytic purification device includes an oxidation tank 11; a water inlet pipe 12 is fixedly connected to the bottom of the oxidation tank 11, a water outlet pipe 13 is fixedly connected to the side of the oxidation tank 11, two sets of brackets 14 are fixedly connected to the inner sidewall of the oxidation tank 11, and a set of cathode plates 16 and a set of anode plates 15 are fixedly connected to the brackets 14. The cathode plates 16 and anode plates 15 are arranged in a staggered manner. The water inlet pipe 12 is located below the cathode plates 16 and anode plates 15, and a sewage flow channel is formed between adjacent cathode plates 16 and anode plates 15.

[0032] During use, sewage is fed into the interior of the oxidation tank 11 through the water inlet pipe 12, and the sewage flows through the sewage flow channel between the anode plate 15 and the cathode plate 16. The sewage after catalytic treatment is discharged from the outlet 83. Through electrocatalytic oxidation technology, it achieves a technology of efficiently purifying pollutants in water through physical and chemical effects under the action of an external electric field. Except for the external electric field, almost no chemical agents are added, thereby reducing the use of chemical agents.

[0033] Further, such as Figure 1-6 and Figure 1-6 As shown, the top of the oxidation tank 11 is rotatably connected to a plurality of rotating shafts 22, the rotating shafts 22 are located above the sewage flow channel, a pulley 23 is fixed to the rotating shaft 22, a pull rope 24 is fixed to the pull rope 23, the bottom end of the pull rope 24 is fixed to a hanger 25, the hanger 25 is located in the sewage flow channel, and scraping bars 26 are fixed on both sides of the hanger 25. The scraping bars 26 located on both sides of the hanger 25 are respectively fitted and slidably matched with the surfaces of the cathode plate 16 and the anode plate 15. A motor 21 is fixed to the oxidation tank 11, and a transmission connection is connected between the output end of the motor 21 and the rotating shaft 22;

[0034] Over a long period of time, there will be deposits on the surface of the electrode plate, which will affect the electrocatalytic reaction. Therefore, a rotating shaft 22 is installed above the oxidation tank 11, and the rotating shaft 22 is driven by a motor 21. The motor 21 and the rotating shaft 22 are connected by a chain sprocket, a gear set or a belt drive, so as to drive the rotating shaft 22 and the pulley 23 to rotate and reel in the pull rope 24. The unwinding of the pull rope 24 causes the hanger 25 to move downward. During the downward movement of the hanger 25, the scraper 26 and the cathode plate 16 and the anode plate 15 are scraped together to clean the cathode plate 16 and remove the deposits on its surface, thereby reducing the impact of the deposits on the electrocatalytic oxidation reaction after long-term use.

[0035] Further, such as Figure 1-6 As shown, two pairs of supports 31 are fixedly connected to the hanger 25, and two brush rollers 32 are provided on the two pairs of supports 31. The two brush rollers 32 are respectively located on both sides of the hanger 25 and on the sides of the scraper 26. When the hanger 25 moves, the bristles on the brush rollers 32 contact and scrub the cathode plate 16 or the anode plate 15.

[0036] During use, the hanger 25 moves up and down, which drives the support 31 and the brush roller 32 installed on the support 31 to move up and down. The brush roller 32 can be used to brush the surfaces of the cathode plate 16 and the anode plate 15 to remove the deposits on the surfaces of the cathode plate 16 and the anode plate 15 and improve the cleaning effect.

[0037] Further, such as Figure 1-6 As shown, both ends of the hanger 25 are fixedly connected to a sliding seat 42, and a slide rail 41 is fixedly connected to the corresponding positions of the inner side wall of the oxidation tank 11 and the sliding seat 42, and the sliding seat 42 and the slide rail 41 are slidably connected; the end of the brush roller 32 is fixedly connected to a support shaft 51, and the support shaft 51 passes through the support 31 and is rotatably connected thereto, and a bearing is installed at the rotation connection between the support shaft 51 and the support 31, and the end of the support shaft 51 is fixedly connected to a friction wheel 52, and the surface of the friction wheel 52 is provided with anti-skid grooves, and the friction wheel 52 is located on the side of the bracket 14; a friction plate 6 is fixedly connected to the corresponding positions of the side of the bracket 14 and the friction wheel 52, and the friction plate 6 is located on the side of the friction wheel 52;

[0038] When in use, a sliding seat 42 is fixed to the side of the hanger 25, and a sliding rail 41 is fixed to the inner wall of the oxidation tank 11 and is slidably connected to the sliding seat 42. The sliding rail 41 can guide the sliding seat 42, thereby improving the stability of the up and down movement of the hanger 25. The end of the brush roller 32 is fixed to the rotating shaft 22, and the rotating shaft 22 and the support 31 are rotatably connected. A friction wheel 52 is fixed to the end of the rotating shaft 22, and the surface of the friction wheel 52 is provided with anti-slip grooves. The friction wheel 52 rolls on the side of the bracket 14 to rub and roll. Furthermore, a friction plate 6 is provided on the bracket 14, and the surface of the friction plate 6 is made of rubber, which is used to reduce the slipping of the friction wheel 52.

[0039] Further, such as Figure 1-6 As shown, a support plate 71 is bolted to the top of the hanger 25, and a counterweight 72 is fixed to the top of the support plate 71; the water inlet pipe 12 includes a water delivery roller and multiple water distribution pipes 82, the water delivery pipe 81 is fixed to the bottom of the oxidation tank 11, and the water distribution pipe 82 is fixed to the water delivery pipe 81. The water distribution pipe 82 is located below the sewage flow channel, and multiple water outlets 83 are opened on the top of the water distribution pipe 82;

[0040] When in use, the support plate 71 is bolted on the top of the hanger 25, and the counterweight block 72 is fixed on the support plate 71, so as to increase the weight of the hanger 25, thereby facilitating the downward movement of the hanger 25. The water inlet pipe 12 is composed of a conveying roller and a water distribution roller, and its water distribution pipe 82 is located below the sewage flow channel, so that the sewage can be evenly delivered into the sewage flow channel.

[0041] Further, such as Figure 1-6 As shown, a gas collecting cover 91 is fixedly connected to the top of the oxidation tank 11, and an exhaust pipe 92 is fixedly connected to the top of the gas collecting cover 91. The gas collecting cover 91 is arranged in a small upper and large lower structure; the anode plate 15 includes a titanium metal substrate, a titanium suboxide intermediate transition layer and a surface metal catalyst layer;

[0042] When in use, a gas collecting hood 91 is installed above the oxidation tank 11, and the top of the gas collecting hood 91 is fixedly connected to the exhaust pipe 92 and connected to the exhaust gas treatment equipment, so that the exhaust gas generated can be conveniently collected and processed, and the exhaust gas can be conveniently purified in a centralized manner;

[0043] The anode plate 15 is made of titanium metal as the base material, titanium dioxide as the intermediate transition layer, and a metal catalyst layer on the surface. It is resistant to strong acid and alkali corrosion: has long electrode life, high oxidation efficiency, high pollutant degradation reaction rate, wide applicability to water quality, and high compatibility with the environment.

[0044] Working principle: when in use, sewage is fed into the interior of the oxidation tank 11 through the water inlet pipe 12, and the sewage flows from the sewage flow channel between the anode plate 15 and the cathode plate 16. The sewage after catalytic treatment is discharged from the outlet 83. Through electrocatalytic oxidation technology, it achieves a technology of high-efficiency purification of pollutants in water through physical and chemical effects under the action of an external electric field. Except for the external electric field, almost no chemical agents are added, reducing the use of chemical agents. Over a long period of time, the surface of the electrode plate will have sediments, which will affect the electrocatalytic reaction. Therefore, during the oxidation process, the surface of the electrode plate will have sediments, which will affect the electrocatalytic reaction. A rotating shaft 22 is installed above the tank 11, and the rotating shaft 22 is driven by a motor 21. The motor 21 and the rotating shaft 22 are connected by a chain sprocket, a gear set or a belt drive, thereby driving the rotating shaft 22 and the rope pulley 23 to rotate and reel in the pull rope 24. The unwinding of the pull rope 24 causes the hanger 25 to move downward. During the downward movement of the hanger 25, the scraper 26 and the cathode plate 16 and the anode plate 15 are scraped together to clean the cathode plate 16 and remove the deposits on its surface, thereby reducing the influence of the deposits on the electrocatalytic oxidation reaction after long-term use;

[0045] When in use, the hanger 25 moves up and down, which drives the support 31 and the brush roller 32 installed on the support 31 to move up and down, and the brush roller 32 can brush the surfaces of the cathode plate 16 and the anode plate 15 to remove the deposits on the surfaces of the cathode plate 16 and the anode plate 15, thereby improving the cleaning effect; when in use, the sliding seat 42 is fixed to the side of the hanger 25, and the inner wall of the oxidation tank 11 is fixed with a slide rail 41 that is slidably connected to the sliding seat 42, and the slide rail 41 can guide the sliding seat 42, thereby improving the stability of the hanger 25 moving up and down, the end of the brush roller 32 is fixed to the rotating shaft 22, and the rotating shaft 22 and the support 31 are rotatably connected, and the end of the rotating shaft 22 is fixed with a friction wheel 52, and the surface of the friction wheel 52 is provided with anti-skid grooves. Its friction wheel 52 rolls on the side of the bracket 14 to achieve friction and rolling. Furthermore, a friction plate 6 is provided on the bracket 14, and the surface of the friction plate 6 is made of rubber, which is used to reduce the slipping of the friction wheel 52; it relies on the top bolted support plate 71 of the hanger 25, and the counterweight block 72 is fixed on the support plate 71, so as to increase the weight of the hanger 25, thereby facilitating the downward movement of the hanger 25. The water inlet pipe 12 is composed of a conveying roller and a water distribution roller, and its water distribution pipe 82 is located below the sewage flow channel, so that the sewage can be evenly delivered to the inside of the sewage flow channel; it relies on the installation of an air collecting hood 91 above the oxidation tank 11, and the top of the air collecting hood 91 is fixedly connected to the exhaust pipe 92 and connected to the exhaust gas treatment equipment, so that the exhaust gas generated by the treatment can be collected and processed conveniently, and the exhaust gas can be concentratedly purified;

[0046] The anode plate 15 is made of titanium metal as the base material, titanium dioxide as the intermediate transition layer, and a metal catalyst layer on the surface. It is resistant to strong acid and alkali corrosion: has long electrode life, high oxidation efficiency, high pollutant degradation reaction rate, wide applicability to water quality, and high compatibility with the environment.

[0047] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A sewage electrocatalytic purification device, comprising an oxidation tank (11); characterized in that: The bottom of the oxidation trough (11) is fixedly connected to a water inlet pipe (12), the side of the oxidation trough (11) is fixedly connected to a water outlet pipe (13), the inner wall of the oxidation trough (11) is fixedly connected to two groups of brackets (14), a group of cathode plates (16) and a group of anode plates (15) are fixedly connected to the brackets (14), the cathode plates (16) and the anode plates (15) are arranged in a staggered manner, the water inlet pipe (12) is located below the cathode plates (16) and the anode plates (15), and a sewage flow channel is formed between adjacent cathode plates (16) and anode plates (15).

2. The sewage electrocatalytic purification device according to claim 1, characterized in that: The top of the oxidation tank (11) is rotatably connected to a plurality of rotating shafts (22), the rotating shafts (22) are located above the sewage flow channel, a rope pulley (23) is fixedly connected to the rotating shaft (22), a pull rope (24) is fixedly connected to the rope pulley (23), the bottom end of the pull rope (24) is fixedly connected to a hanger (25), the hanger (25) is located in the sewage flow channel, scrapers (26) are fixedly connected to both sides of the hanger (25), the scrapers (26) located on both sides of the hanger (25) are respectively fitted with and slidably matched with the surfaces of the cathode plate (16) and the anode plate (15), a motor (21) is fixedly connected to the oxidation tank (11), and a transmission connection is formed between the output end of the motor (21) and the rotating shaft (22).

3. The sewage electrocatalytic purification device according to claim 2, characterized in that: Two pairs of supports (31) are fixedly connected to the hanger (25), and two brush rollers (32) are provided on the two pairs of supports (31). The two brush rollers (32) are respectively located on both sides of the hanger (25), and the brush rollers (32) are located on the side of the scraper (26); when the hanger (25) moves, the bristles on the brush rollers (32) contact and scrub the cathode plate (16) or the anode plate (15).

4. The sewage electrocatalytic purification device according to claim 3, characterized in that: Both ends of the hanger (25) are fixedly connected with a sliding seat (42), and the inner side wall of the oxidation tank (11) and the corresponding positions of the sliding seat (42) are fixedly connected with a sliding rail (41), and the sliding seat (42) and the sliding rail (41) are slidably connected.

5. The sewage electrocatalytic purification device according to claim 4, characterized in that: The end of the brush roller (32) is fixedly connected to a support shaft (51), the support shaft (51) passes through the support (31) and is rotatably connected thereto, a bearing is installed at the rotatable connection between the support shaft (51) and the support (31), the end of the support shaft (51) is fixedly connected to a friction wheel (52), the surface of the friction wheel (52) is provided with anti-skid grooves, and the friction wheel (52) is located on the side of the bracket (14).

6. The sewage electrocatalytic purification device according to claim 5, characterized in that: A friction plate (6) is fixedly connected to the side surface of the bracket (14) and the corresponding position of the friction wheel (52), and the friction plate (6) is located on the side surface of the friction wheel (52).

7. The sewage electrocatalytic purification device according to claim 6, characterized in that: A support plate (71) is bolted to the top of the hanger (25), and a counterweight block (72) is fixed to the top of the support plate (71).

8. The sewage electrocatalytic purification device according to claim 7, characterized in that: The water inlet pipe (12) includes a water delivery roller and a plurality of water distribution pipes (82). The water delivery pipe (81) is fixedly connected to the bottom of the oxidation tank (11). The water distribution pipe (82) is fixedly connected to the water delivery pipe (81). The water distribution pipe (82) is located below the sewage flow channel. The top of the water distribution pipe (82) is provided with a plurality of water outlets (83).

9. The sewage electrocatalytic purification device according to claim 8, characterized in that: A gas collecting hood (91) is fixedly connected to the top of the oxidation tank (11), and an exhaust pipe (92) is fixedly connected to the top of the gas collecting hood (91). The gas collecting hood (91) is arranged in a structure with a small top and a large bottom.

10. The sewage electrocatalytic purification device according to claim 9, characterized in that: The anode plate (15) comprises a titanium metal substrate, a titanium suboxide intermediate transition layer and a surface metal catalytic layer.

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