Pulse electrooxidation sewage degradation device

Abstract

The utility model discloses a pulse electrooxidation sewage degradation device which comprises a sewage treatment tank, a pulse electrooxidation mechanism, an electric floating scraping plate mechanism, an aeration mechanism and a cooling mechanism, the sewage treatment tank is divided into an electrolytic tank and a foam collecting tank through a partition plate; the electric floating and skimming scraper mechanism is arranged above the sewage treatment tank; the pulse electrooxidation mechanism is arranged in the electrolytic bath; the aeration mechanism is arranged at the bottom of the electrolytic bath; the cooling mechanism is arranged at the bottom of the sewage treatment tank; the electrolytic bath comprises a water inlet, a groove, a water outlet, a cathode fixing groove and an anode fixing groove; the electric floating and skimming scraper mechanism comprises a fixing frame, a fixing rod, a driving motor, a controller, a lead screw, a sliding block and a scraper. The sewage treatment device has the advantages of being ingenious in design, simple to operate, convenient to control, good in sewage treatment effect, low in energy consumption, long in service life and the like, and has a wide market prospect and a good economic value.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a pulse electric oxidation sewage degradation device. Background Art

[0002] Advanced oxidation technology (AOPS) has shown great advantages in treating difficult-to-degrade industrial wastewater. It has the advantages of high COD removal rate, high mineralization degree, wide applicability to water quality, good operation stability, and small footprint. Electrochemical oxidation treatment of wastewater is a method of applying the basic principle of electrolysis to purify wastewater by oxidizing and reducing harmful substances in wastewater at the positive and negative electrodes through the electrolysis process and successfully mineralizing them into harmless inorganic substances. As an advanced oxidation technology (AOPS), electrochemical oxidation technology has strong oxidation ability. It can directly oxidize pollutants by electron transfer, and can also use intermediates such as OH, ClO- and HClO produced by electrolysis. The intermediates indirectly oxidize organic matter, so that large molecular difficult-to-degrade organic matter is oxidized and degraded into non-toxic and harmless small molecular organic matter. However, electro-oxidation is a heterogeneous reaction and is often limited by mass transfer. It has problems such as low current efficiency and high energy consumption. In addition, the electrode plates are directly inserted vertically in the electrolytic cell to electrolyze the wastewater. Due to the small electrode area, poor mass transfer and low space utilization efficiency, the wastewater cannot be fully electrolyzed and mineralized, which limits the large-scale promotion and application of this technology.

[0003] In the prior art, a pulse electrochemical method for improving the biodegradability of reverse osmosis concentrated water with patent number "202111166872.1" uses pulse electro-oxidation to solve the mass transfer limitation caused by heterogeneous reactions on the electrode surface, improve current efficiency by 15% and reduce energy consumption. A modular electrocatalytic oxidation device with patent number "202223090292.1" consists of multiple electrocatalytic oxidation device modules. Wastewater enters the device from the water inlet pipe through the water distribution plate. Spray ports, spray pipes and exhaust devices are set above the electrode group. In order to facilitate the cleaning of the electrodes, drainage and slag discharge ports are also set. Electrocatalytic oxidation device modules can be added or reduced in real time to quickly achieve the scale of electrocatalytic oxidation devices that match the amount of treated water. However, this scheme does not take into account the situation that the wastewater temperature will rise and foam will be generated during the electro-oxidation process. In an electrocatalytic oxidation device for treating difficult-to-degrade wastewater with patent number "202311777885.1", the electro-oxidation device has poor fluidity, small electrode contact area, and poor treatment effect.

[0004] At present, it is found in industrial wastewater treatment technology that the existing electrocatalytic oxidation devices have problems such as poor wastewater fluidity, small contact area between electrodes and wastewater, and increased wastewater temperature and foaming during the electrocatalytic process, resulting in poor wastewater treatment effects and even corrosion of the electrocatalytic device. Summary of the invention

[0005] The utility model provides a pulse electro-oxidation sewage degradation device with good sewage degradation effect, low energy consumption, low operating cost and less equipment corrosion. It solves the problems of high energy consumption, poor fluidity of electro-oxidation devices, small electrode contact area, poor treatment effect and foam corrosion of equipment caused by electro-catalytic oxidation of sewage in existing sewage degradation devices, reduces the operating and maintenance costs of sewage treatment and improves the sewage treatment effect.

[0006] The utility model provides a pulse electric oxidation sewage degradation device, comprising a sewage treatment tank for sewage treatment, a pulse electric oxidation mechanism for electrocatalytic oxidation of sewage, an electric floating scraper mechanism for brushing floating foam, an aeration mechanism for increasing the oxygen concentration of sewage and a cooling mechanism for reducing the temperature of sewage; the sewage treatment tank is divided into an electrolytic tank and a foam collecting tank by a partition; the electric floating scraper mechanism is arranged above the sewage treatment tank; the pulse electric oxidation mechanism is arranged in the electrolytic tank; the aeration mechanism is arranged at the bottom of the electrolytic tank; the cooling mechanism is arranged at the bottom of the sewage treatment tank; the electrolytic tank comprises a water inlet arranged at the bottom of the electrolytic tank and a groove for installing and fixing the aeration mechanism, a water outlet arranged at the top of the electrolytic tank and a cooling mechanism for cooling the sewage. and an anode fixing groove and a cathode fixing groove respectively arranged on the groove walls on both sides of the electrolytic cell for fixing the pulse electric oxidation mechanism; the electric floating scraper mechanism includes a fixing frame arranged at both ends of the sewage treatment tank, a fixing rod arranged between the two fixing frames, a driving motor fixed to the outside of the fixing frame and located at one end of the fixing rod, a controller electrically connected to the driving motor, a screw rod arranged between the two fixing frames and connected to the driving motor, a slider arranged on the screw rod and moving back and forth between the two fixing frames, and a scraper fixed on the slider and located just above the sewage treatment tank for brushing floating foam; the slider is controlled to move between the two fixing frames by driving the screw rod to rotate through the driving motor, and the slider moves between the two fixing frames to drive the scraper to move between the two ends of the sewage treatment tank.

[0007] Preferably, the bottom of the scraper is higher than the top of the partition; and the scraper is a non-conductive plastic scraper.

[0008] Preferably, the pulse electro-oxidation mechanism comprises a DC pulse power supply arranged outside the electrolytic cell and a cathode electrode and an anode electrode alternately staggered in the electrolytic cell; a cathode electrode arc groove for installing a cooling mechanism is provided at the bottom of the cathode electrode; an anode electrode arc groove for installing a cooling mechanism is provided at the bottom of the anode electrode; the shape and structure of the cathode electrode are the same as those of the anode electrode, and the quantity matches.

[0009] Preferably, the anode fixing grooves and cathode fixing grooves are arranged alternately, and the cathode electrode is fixed to the side wall of one side of the electrolytic cell by the cathode fixing grooves; the anode electrode is fixed to the side wall of the other side of the electrolytic cell by the anode fixing grooves.

[0010] Preferably, the cathode electrode is one or more of a graphite electrode, a stainless steel electrode, and a metal titanium electrode; and the anode electrode is one or more of a titanium ruthenium electrode, a titanium tantalum electrode, and a titanium iridium electrode.

[0011] Preferably, the negative electrode of the DC pulse power supply is connected to the cathode electrode through a wire, and the positive electrode of the DC pulse power supply is connected to the anode electrode through a wire.

[0012] Preferably, the height of the sewage treatment tank wall is greater than the height of the partition; the height of the partition is greater than the height of the cathode electrode, and the height of the cathode electrode is the same as the height of the anode electrode.

[0013] Preferably, the distance between adjacent cathode electrodes and anode electrodes is 1-2 cm.

[0014] Preferably, the aeration mechanism comprises a fan arranged outside the electrolytic cell and an aeration pipe arranged in a groove at the bottom of the electrolytic cell and connected to the fan; the aeration pipe is an air stone strip or a plastic film tube.

[0015] Preferably, the cooling mechanism includes a cooling pipe arranged at the bottom of the sewage treatment tank and a water inlet pump arranged outside the sewage treatment tank; the liquid inlet end and the liquid outlet end of the cooling pipe are both arranged outside the sewage treatment tank, and the water inlet pump is connected to the liquid inlet end of the cooling pipe by a pipe; the cooling pipe is arranged in the cathode electrode arc groove and the anode electrode arc groove, and non-conductive plastic pads are provided at the contact positions of the cooling pipe and the cathode electrode arc groove and the anode electrode arc groove.

[0016] Compared with the prior art, the utility model has the advantages of clever design, simple operation, convenient control, good sewage treatment effect, low energy consumption, long equipment service life, low sewage treatment cost, etc., and has broad market prospects and good economic value. The utility model uses a DC pulse power supply as the power source for electrocatalytic oxidation and degradation of sewage. The pulse current oxidation mode works in an intermittent manner of "discharge-charge-discharge" of the electrode, which helps to eliminate the concentration polarization on the electrode surface and improve the electrolysis efficiency, thereby saving energy consumption and reducing operating costs; the cathode electrode and the anode electrode are cross-staggered, and the cathode electrode and the anode electrode can act as a baffle to increase the flow distance of the sewage after entering the electrolytic cell, improve the fluidity of the sewage, thereby increasing the contact area between the sewage and the cathode electrode and the anode electrode, improving the electrocatalytic oxidation effect, and improving the sewage degradation efficiency; in order to increase the stability of the cathode electrode and the anode electrode, a cathode fixing groove and an anode fixing groove are added to the side wall of the electrolytic cell. The fixed tank, the cathode electrode and the cathode fixed tank are engaged, and the anode electrode and the anode fixed tank are engaged, so that the cathode electrode and the anode electrode can be firmly fixed on the side walls on both sides of the electrolytic tank, avoiding the electrode plates from being offset by the impact of water flow after the sewage enters the electrolytic tank, thereby improving the stability of the electrocatalytic oxidation of sewage; an electric floating scraper mechanism is also arranged above the sewage treatment tank, which is used to scrape off the foam generated during the electrocatalytic oxidation and degradation of sewage, reduce the corrosion of the foam to the equipment, and increase the service life of the pulse electrocatalytic sewage degradation device; a cooling mechanism and an aeration mechanism are also arranged at the bottom of the electrolytic tank, which are respectively used to reduce the temperature of the sewage and increase the oxygen concentration of the sewage in the electrolytic tank, thereby improving the sewage treatment efficiency and enhancing the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are 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.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a top view of the sewage treatment tank of the utility model.

[0020] Figure 3 It is a right side view of the sewage treatment tank of the utility model.

[0021] Figure 4 It is a structural diagram of the cathode electrode of the utility model.

[0022] Figure 5 It is a structural diagram of the electric floating scraper mechanism of the utility model.

[0023] Figure 6 The utility model is a sewage flow diagram in a sewage treatment tank.

[0024] Among them, there are sewage treatment tank 1; partition 10; electrolytic cell 11; water inlet 111; water outlet 112; foam collection tank 12; pulse electro-oxidation mechanism 2; DC pulse power supply 21; cathode electrode 22; cathode electrode arc groove 221; anode electrode 23; electric floating scraper mechanism 3; fixing frame 31; fixing rod 32; driving motor 33; controller 34; screw 35; slider 36; scraper 37; aeration mechanism 4; fan 41; aeration pipe 42; cooling mechanism 5; cooling pipe 51; water inlet pump 52. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figures 1 to 5 As shown, a pulse electro-oxidation sewage degradation device comprises a sewage treatment tank 1 for sewage treatment, a pulse electro-oxidation mechanism 2 for electro-catalytic oxidation of sewage, an electric flotation scraper mechanism 3 for brushing the froth on the sewage treatment tank 1, an aeration mechanism 4 for increasing the oxygen concentration of sewage, and a cooling mechanism 5 for reducing the temperature of sewage. Figure 1 and Figure 2As shown, the sewage treatment tank 1 is divided into an electrolytic tank 11 and a foam collecting tank 12 by a partition 10, wherein the height of the tank wall of the sewage treatment tank 1 is greater than the height of the partition 10. In this embodiment, the sewage treatment tank is a rectangular parallelepiped structure with an upper end opening; the foam collecting tank 12 is arranged on the left side of the electrolytic tank 11, and the height of the partition 10 is less than the height of the upper end surface of the sewage treatment tank 1, so that the floating foam generated during the sewage treatment process of the electrolytic tank 11 can be scraped into the foam collecting tank 12 by the electric floating scraper mechanism 3. The electric floating scraper mechanism 3 is arranged above the sewage treatment tank 1, and the floating foam on the electrolytic tank 11 is brushed into the foam collecting tank 12 by the electric floating scraper mechanism 3 for collection. The pulse electro-oxidation mechanism 2 is arranged in the electrolytic tank 11, and the sewage in the electrolytic tank is treated by the pulse electro-oxidation mechanism 2. The aeration mechanism 4 is arranged at the bottom of the electrolytic tank 11, and the external air is transported into the electrolytic tank through the aeration mechanism to increase the oxygen content in the electrolytic tank. The cooling mechanism 5 is arranged at the bottom of the sewage treatment tank 1, and the temperature of the sewage in the electrolytic tank is reduced by the cooling mechanism, thereby improving the sewage treatment efficiency in the electrolytic tank. The electrolytic tank 11 includes a water inlet 11 for injecting external sewage into the electrolytic tank for treatment, a groove for installing a fixed aeration mechanism, a water outlet 112 for discharging the treated sewage in the electrolytic tank, and a cathode fixed groove and an anode fixed groove respectively arranged on both sides of the electrolytic tank, and the cathode fixed groove and the anode fixed groove are alternately staggered. In this embodiment, the water inlet 111 is arranged at the bottom of the electrolytic tank 111, located at one end of the electrolytic tank 111 away from the foam collecting tank 12. The groove is arranged at the bottom of the electrolytic tank along the length direction of the electrolytic tank. The water outlet is arranged at the upper part of the electrolytic tank, located at one end of the electrolytic tank 111 close to the foam collecting tank 12, and the position of the water outlet is lower than the upper end of the partition.

[0027] Wherein, the partition 10 and the sewage treatment tank 1 are both made of non-conductive epoxy resin or polymethyl methacrylate (PMMA) material, which effectively avoids affecting the process of electrocatalytic oxidation degradation of sewage. In this embodiment, the partition 10 and the tank wall of the sewage treatment tank 1 are both made of epoxy resin; the water inlet of the electrolytic tank 11 is set at the bottom of one section of the electrolytic tank, and the water outlet is set at the upper part of the other end, that is, the water inlet is lower and the water outlet is upper, which increases the residence time of the sewage in the electrolytic tank 11, thereby increasing the contact time and area between the sewage and the pulse electro-oxidation mechanism 2, so that the sewage can be fully oxidized and treated, and the sewage treatment efficiency is improved.

[0028] like Figures 1 to 5 As shown, in order to better degrade the sewage and improve the sewage treatment efficiency of the reaction device, the modules arranged inside the electrolytic cell 11 are designed to improve the sewage treatment efficiency. Figure 1 and Figure 2As shown, the pulse electro-oxidation mechanism 2 includes a DC pulse power supply 21 disposed outside the electrolytic cell 11 and a cathode electrode 22 and an anode electrode 23 disposed in the electrolytic cell along the length direction of the electrolytic cell. The DC pulse power supply 21 adopts an existing DC pulse power supply sold on the market, and the output voltage of the DC pulse power supply 21 is ≤20V, the duty cycle is 0.5-0.6, and the power frequency is 1.0-3.0kHz. The number of the cathode electrodes 22 is the same as the number of the anode electrodes 23, and the cathode electrodes 22 and the anode electrodes 23 are alternately staggered in the electrolytic cell.

[0029] like Figure 1 , Figure 2 as well as Figure 4 As shown, the cathode electrode 22 is provided with a cathode electrode arc groove 221 for installing the cooling mechanism 5, and the cathode electrode arc groove 221 is arranged at the bottom of the cathode electrode 22. There are two cathode electrode arc grooves 221. The anode electrode 23 is provided with an anode electrode arc groove for installing the cooling mechanism 5, and the anode electrode arc groove is arranged at the bottom of the anode electrode. There are two anode electrode arc grooves.

[0030] The shape, structure and size of the cathode electrode 22 in this embodiment are the same as those of the anode electrode 23. The size and shape of the arc groove of the cathode electrode are the same as those of the arc groove of the anode electrode. Figure 1 As shown, the height of the cathode electrode 22 is the same as the height of the anode electrode 23 , and the height of the separator 10 is greater than the height of the cathode electrode 22 .

[0031] like Figure 1 and Figure 2 As shown, the cathode electrode 22 is fixed to the side wall of one side of the electrolytic cell 11 by a cathode fixing groove. The anode electrode 23 is fixed to the side wall of the other side of the electrolytic cell 11 by an anode fixing groove. The positive electrode of the DC pulse power supply 21 is connected to the anode electrode 23 through a wire; the negative electrode of the DC pulse power supply 21 is connected to the cathode electrode 22 through a wire.

[0032] The size of the anode electrode in this embodiment is adapted to the size of the anode fixing groove, and the anode electrode and the anode fixing groove are engaged, so that the multiple anode electrodes are respectively fixed on the side wall of one side of the electrolytic cell. The cathode electrode is fixed on the other side wall of the electrolytic cell in the same way as the anode electrode. After a plurality of cathode electrodes and a plurality of anode electrodes are fixed in the electrolytic cell by the anode fixing groove and the cathode fixing groove respectively, the cathode electrodes and the anode electrodes are arranged crosswise and staggered in the electrolytic cell, wherein the water inlet of the electrolytic cell is arranged at the bottom of the side wall of the electrolytic cell, located at the water inlet end position of the gap formed between the side wall of one end of the electrolytic cell and the anode electrode; the water outlet is arranged at the upper part of the side wall of the electrolytic cell, located at the end position of the gap formed between the last cathode electrode and the side wall of the other end of the electrolytic cell; the utility model utilizes the cathode electrode and the anode electrode as the sewage flow baffle in the electrolytic cell, so that the sewage flows in a Z shape in the electrolytic cell, increases the contact area between the sewage and the cathode electrode and the anode electrode and the flow time of the sewage in the electrolytic cell, thereby improving the efficiency of electrocatalytic oxidation degradation of sewage and improving the sewage treatment effect; such as Figure 6 As shown, when sewage enters the electrolytic cell from the water inlet, the sewage flows forward along the gap formed between the side wall at one end of the electrolytic cell and the anode electrode. When the sewage flows to the side wall at the other end of the electrolytic cell, it encounters the obstruction of the side wall and is deflected to the gap formed between the anode electrode and the adjacent cathode electrode and continues to move forward until it flows out from the water outlet at the end of the gap formed between the last cathode electrode and the side wall at the other end of the electrolytic cell, thereby increasing the flow time and stroke of the sewage in the electrolytic cell, so that the pulse electro-oxidation mechanism 2 can fully oxidize the sewage in the electrolytic cell.

[0033] In order to improve the oxidation treatment effect of sewage, the cathode electrode and anode electrode of the pulse electric oxidation mechanism 2 are designed. The cathode electrode 22 is one or more of a graphite electrode, a stainless steel electrode, and a metal titanium electrode; the anode electrode (23) is one or more of a titanium ruthenium electrode, a titanium tantalum electrode, and a titanium iridium electrode; the number of the anode electrodes 23 is 10 to 25. In this embodiment, the cathode electrode 22 is a graphite electrode, the anode electrode 23 is a titanium ruthenium electrode, the distance between adjacent cathode electrodes 22 and anode electrodes 23 is 2 cm, and the number of cathode electrodes and anode electrodes is 10 (only part is drawn in the figure); the output voltage of the DC pulse power supply 21 is 20V, the duty cycle is 0.5, and the power frequency is 2kHz.

[0034] In order to increase the oxygen content in the electrolytic cell and quickly replenish the oxygen consumed in the electrolytic cell, the aeration mechanism is designed. Figures 1 to 3As shown, the aeration mechanism 4 includes a fan 41 arranged outside the electrolytic cell 11 and an aeration tube 42 arranged in a groove at the bottom of the electrolytic cell 11, and the aeration tube is evenly provided with aeration holes. The fan 41 is connected to the aeration tube 42 through a pipeline; the aeration tube 42 is a non-conductive bubble stone strip or a plastic film tube. When the fan 41 is working, tiny bubbles will emerge from the aeration tube 42 on the aeration tube 42, thereby oxygenating the electrolytic cell 11; in this embodiment, the aeration tube 42 is an air stone strip; the aeration mechanism 4 is used to increase the oxygen concentration of the sewage in the electrolytic cell 11, which can provide oxygen for the electrocatalytic reaction to the maximum extent, improve the sewage treatment efficiency, and at the same time, the bubbles generated in the aeration tube 42 can increase the fluidity of the water body, increase the contact area between the sewage and the cathode electrode 22 and the anode electrode 23, and improve the sewage treatment effect.

[0035] like Figure 1 and Figure 2 As shown, the cooling mechanism 5 includes a cooling pipe 51 arranged at the bottom of the sewage treatment tank 1, a water inlet pump 52 arranged outside the sewage treatment tank 1, and a cooling pool for storing cooling water; wherein, the liquid inlet end and the liquid outlet end of the cooling pipe 51 are both arranged outside the sewage treatment tank 1. The liquid inlet of the water inlet pump is connected to the cooling pool through a pipeline; the liquid outlet of the water inlet pump is connected to the liquid inlet end of the cooling pipe 51 through a pipeline, and the liquid outlet end of the cooling pipe is connected to the cooling pool through a pipeline; wherein, the size and shape of the cooling pipe are matched with the size and shape of the arc groove of the cathode electrode. The cooling pipe 51 is arranged in the cathode electrode arc groove 221 at the bottom of the cathode electrode 22 and the anode electrode arc groove at the bottom of the anode electrode 23. In order to prevent the cooling pipe from directly contacting the cathode electrode 22 and the anode electrode 23, resulting in a short circuit, non-conductive plastic pads are arranged at the contact position between the cooling pipe and the arc groove. During operation, the cooling water in the cooling pool is injected into the cooling pipe through the water inlet pump 52, and the heat generated by the electrolytic cell 11 in the sewage treatment process is taken out of the electrolytic cell by the cooling water in the cooling pipe. After absorbing the heat, the cooling water flows back to the cooling pool through the pipeline to prevent the water temperature from being too high, which leads to a decrease in sewage treatment efficiency. The cooling pipe is made of a stainless steel pipe, a copper pipe or other pipe with strong heat exchange energy and corrosion resistance. The cooling water is tap water.

[0036] During the process of electrocatalytic oxidation degradation of sewage, a large amount of bubbles and foam are generated in the electrolytic cell 11. In order to remove the foam on the surface of the electrolytic cell in time and prevent the foam from corroding the pulse electro-oxidation sewage degradation device, an electric flotation scraper mechanism 3 is added above the sewage treatment tank 1.

[0037] like Figure 1 , Figure 3 as well as Figure 5As shown, the electric floating scraper mechanism 3 includes a fixed frame 31 installed and fixed at both ends of the sewage treatment tank 1, a fixed rod 32 fixed between the two fixed frames, a drive motor 33, a controller 34 electrically connected to the drive motor 33, a screw rod 35 arranged between the two fixed frames 31 and connected to the drive motor 33, a slider 36 arranged on the screw rod 35 and moving back and forth between the two fixed frames 31, and a scraper 37 fixed on the slider and located directly above the sewage treatment tank 1; the fixed frame 31 is a conical fixed frame and the number is two. The two fixed frames 31 are respectively fixed at both ends of the length direction of the electrolytic cell. The two ends of the fixed rod 32 are respectively fixed to the upper end of the fixed frame 31, which is located directly above the sewage treatment tank 1. The screw rod is set on the fixed frame through the rotating shaft. The drive motor is installed and fixed on the fixed frame where the foam collection tank 12 is located, and is located outside the fixed frame. The power output end of the drive electrode is connected to one end of the screw rod 35, and it is driven to rotate between the two fixed frames through the drive electrode. The slider 36 is sleeved in the screw rod 35. When the screw rod 35 driven by the driving motor 33 rotates, the screw rod rotates and drives the slider to move between the two fixed frames 31. The scraper 37 is installed and fixed on the slider 36. The scraper 37 is located directly above the sewage treatment tank 1, and the bottom of the scraper 37 is higher than the end of the partition 10 and the liquid surface, so that the scraper 37 is suspended above the electrolytic tank 11, ensuring that the scraper 37 does not touch the pulse electro-oxidation mechanism 2 during the process of scraping the foam. Among them, the scraper 37 is a non-conductive plastic scraper; the driving motor 33 is a stepping motor.

[0038] like Figure 5 As shown, when it is necessary to scrape the foam in the electrolytic cell 11, the driving motor 33 is started by the controller 34. After the driving motor 33 starts working, it drives the screw rod 35 to rotate. The slider 36 located on the screw rod 35 moves toward the foam collecting tank 12 under the drive of the screw rod 35. The scraper 37 fixed under the slider 36 moves synchronously with the slider 36, and then the foam accumulated on the liquid surface of the electrolytic cell 11 is scraped into the foam collecting tank 12. When the slider 36 slides to the end of the screw rod 35, the controller 34 controls the driving motor 33 to reverse, so that the slider 36 and the scraper 37 return to their original positions. Through the reciprocating motion of the slider 36 and the scraper 37, the foam is continuously scraped off, so that the internal structure of the electrolytic cell 11 is prevented from being corroded by the foam, thereby improving the service life of the device.

[0039] The DC pulse power supply 21 and the drive motor 33 in the utility model can be realized by using the DC pulse power supply and the stepper motor currently sold on the market; the fan 41 can be realized by using the air compressor currently sold on the market; the water inlet pump 52 can be realized by using the centrifugal pump currently sold on the market.

[0040] The general working process of the utility model is as follows: when sewage starts to enter the electrolytic cell 11 from the water inlet 111, the electrocatalytic oxidation mechanism 2 starts to work, the DC pulse power supply 21 starts to output current to the cathode electrode 22 and the anode electrode 23, and an electrocatalytic reaction occurs between the cathode electrode 22 and the anode electrode 23 to degrade the sewage. After the sewage enters the electrolytic cell 11, it will flow forward along the gap formed by the cathode electrode 22 and the anode electrode 23, increasing the flow time of the sewage in the electrolytic cell, so that the contact area between the sewage and the cathode electrode 22 and the anode electrode 23 is increased, thereby improving the efficiency of degrading sewage; the pulse current oxidation mode of the DC pulse power supply 21 works in an intermittent manner of "discharge-charge-discharge" of the electrode, which helps to eliminate the concentration polarization on the electrode surface, improve the electrolysis efficiency, and save energy consumption; at the same time, the aeration mechanism 4 and the cooling mechanism 5 also start to work, the fan 41 inflates the aeration pipe 42, and tiny bubbles with oxygen are formed on the surface of the aeration pipe 42, which drives the water body to flow while increasing the oxygen concentration in the sewage water body, thereby improving the sewage treatment efficiency. The cooling water is injected into the cooling pipe 51 through the water inlet pump 52, and the cooling water flows in the cooling pipe 51, and the heat in the electrolytic cell 11 is taken out through heat transfer, so as to reduce the temperature of the sewage in the electrolytic cell 11, and prevent the sewage temperature from being too high, causing the sewage to boil and evaporate, and affecting the sewage degradation effect; when foam is generated on the surface of the sewage, the controller 34 controls the drive motor 33 to start, so that the electric floating scraper mechanism 3 works, and the drive motor 33 drives the screw rod 35 to rotate, so that the slider 36 sleeved on the surface of the screw rod 35 moves to the foam. The scraper 37 moves in the direction of the foam collecting tank 12, and the scraper 37 moves synchronously with the slider 36 to scrape the floating foam on the sewage surface into the foam collecting tank 12 for collection. When the slider 36 slides on the end of the screw rod 35, the controller 34 controls the driving motor 33 to reverse, so that the slider 36 and the scraper 37 move in the opposite direction and return to the original position. The reciprocating motion of the slider 36 and the scraper 37 continuously removes the floating foam on the liquid surface, avoids the corrosion of the various mechanisms in the device by the floating foam, and improves the service life of the pulse electro-oxidation sewage degradation device.

[0041] In addition to the graphite electrode described in the above embodiment, the cathode electrode described in the above implementation can also be implemented by one or more of a stainless steel electrode and a metal titanium electrode, which will not be elaborated in detail here. In addition to the titanium ruthenium electrode described in the above embodiment, the anode electrode can also be implemented by one or more of a titanium ruthenium electrode, a titanium tantalum electrode, and a titanium iridium electrode, which will not be elaborated in detail here; in addition to the output voltage of 20V, the duty cycle of 0.5, and the power supply frequency of 2kHz described in the above embodiment, the DC pulse power supply can also use an output voltage of ≤20V, a duty cycle of 0.5-0.6, and a power supply frequency of 1.0-3.0kHz, which will not be elaborated in detail here. In addition to the distance of 10 described in the above embodiment, the number of cathode electrodes and anode electrodes can also be implemented by any other number of 10-20, which will not be elaborated in detail here. In addition to the distance of 2cm described in the above embodiment, the spacing between adjacent cathode electrodes and anode electrodes can also be implemented by any other distance value of 1-2cm, which will not be elaborated in detail here.

[0042] 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 various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements 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 pulse electro-oxidation sewage degradation device, characterized in that: The invention comprises a sewage treatment tank (1) for sewage treatment, a pulse electro-oxidation mechanism (2) for electrocatalytic oxidation of sewage, an electric floating scraper mechanism (3) for brushing floating foam, an aeration mechanism (4) for increasing the oxygen concentration of sewage, and a cooling mechanism (5) for reducing the temperature of sewage; the sewage treatment tank (1) is divided into an electrolytic tank (11) and a foam collecting tank (12) by a partition (10); the electric floating scraper mechanism (3) is arranged above the sewage treatment tank (1); the pulse electro-oxidation mechanism (2) is arranged in the electrolytic tank (11); the aeration mechanism (4) is arranged at the bottom of the electrolytic tank (11); the cooling mechanism (5) is arranged at the bottom of the sewage treatment tank (1); the electrolytic tank (11) comprises a water inlet (111) arranged at the bottom of the electrolytic tank (11) and a groove for installing and fixing the aeration mechanism (4), a water outlet (112) arranged at the top of the electrolytic tank (11), and two water outlets (112) arranged on the tank walls on both sides of the electrolytic tank (11) for fixing the aeration mechanism (4). The pulsed electro-oxidation mechanism (2) has an anode fixed tank and a cathode fixed tank; the electric floating scraper mechanism (3) comprises a fixed frame (31) arranged at both ends of the sewage treatment tank (1), a fixed rod (32) arranged between the two fixed frames (31), a driving motor (33) fixed outside the fixed frame (31) and located at one end of the fixed rod (32), a controller (34) electrically connected to the driving motor (33), a screw rod (35) arranged between the two fixed frames (31) and connected to the driving motor (33), a slider (36) arranged on the screw rod (35) and moving back and forth between the two fixed frames (31), and a scraper (37) fixed on the slider and located directly above the sewage treatment tank (1) for brushing floating foam; the slider (36) is controlled to move between the two fixed frames (31) by the driving motor (33) driving the screw rod (35) to rotate, and the slider (36) moves between the two fixed frames (31) to drive the scraper (37) to move between the two ends of the sewage treatment tank (1).

2. The pulse electro-oxidation wastewater degradation device according to claim 1 is characterized in that: The bottom of the scraper (37) is higher than the top of the partition (10); the scraper (37) is a non-conductive plastic scraper.

3. The pulse electro-oxidation wastewater degradation device according to claim 1 is characterized in that: The pulse electro-oxidation mechanism (2) comprises a direct current pulse power supply (21) arranged outside the electrolytic cell (11) and a cathode electrode (22) and an anode electrode (23) arranged alternately and staggered in the electrolytic cell (11); the bottom of the cathode electrode (22) is provided with a cathode electrode arc groove (221) for installing a cooling mechanism (5); the bottom of the anode electrode (23) is provided with an anode electrode arc groove for installing a cooling mechanism (5); the shape and structure of the cathode electrode (22) are the same as those of the anode electrode (23), and the number of the cathode electrode (22) matches.

4. The pulse electro-oxidation wastewater degradation device according to claim 3 is characterized in that: The anode fixing grooves and the cathode fixing grooves are arranged alternately, and the cathode electrode (22) is fixed to the side wall of one side of the electrolytic cell (11) by means of the cathode fixing grooves; and the anode electrode (23) is fixed to the side wall of the other side of the electrolytic cell (11) by means of the anode fixing grooves.

5. The pulse electro-oxidation wastewater degradation device according to claim 4 is characterized in that: The cathode electrode (22) is one or more of a graphite electrode, a stainless steel electrode, and a metal titanium electrode; the anode electrode (23) is one or more of a titanium ruthenium electrode, a titanium tantalum electrode, and a titanium iridium electrode.

6. The pulse electro-oxidation wastewater degradation device according to claim 3 is characterized in that: The negative electrode of the DC pulse power supply (21) is connected to the cathode electrode (22) via a wire, and the positive electrode of the DC pulse power supply (21) is connected to the anode electrode (23) via a wire.

7. The pulse electro-oxidation wastewater degradation device according to claim 3 is characterized in that: The height of the wall of the sewage treatment tank (1) is greater than the height of the partition (10); the height of the partition (10) is greater than the height of the cathode electrode (22), and the height of the cathode electrode (22) is the same as the height of the anode electrode (23).

8. The pulse electro-oxidation wastewater degradation device according to claim 3 is characterized in that: The distance between adjacent cathode electrodes (22) and anode electrodes (23) is 1 to 2 cm.

9. The pulse electro-oxidation wastewater degradation device according to claim 1, characterized in that: The aeration mechanism (4) comprises a fan (41) arranged outside the electrolytic cell (11) and an aeration pipe (42) arranged in a groove at the bottom of the electrolytic cell (11) and connected to the fan (41); the aeration pipe (42) is an air stone strip or a plastic film tube.

10. The pulse electro-oxidation wastewater degradation device according to claim 1, characterized in that: The cooling mechanism (5) comprises a cooling pipe (51) arranged at the bottom of the sewage treatment tank (1) and a water inlet pump (52) arranged outside the sewage treatment tank (1); the liquid inlet end and the liquid outlet end of the cooling pipe (51) are both arranged outside the sewage treatment tank (1), and the water inlet pump (52) is connected to the liquid inlet end of the cooling pipe via a pipe; the cooling pipe (51) is arranged in the cathode electrode circular arc groove (221) and the anode electrode circular arc groove, and non-conductive plastic pads are provided at the contact positions of the cooling pipe and the cathode electrode circular arc groove (221) and the anode electrode circular arc groove.

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