A three-dimensional electrolytic catalytic oxidation sewage treatment device

Abstract

The present invention discloses a three-dimensional electrolytic catalytic oxidation sewage treatment device, which includes an electrolytic cell. A water inlet pipe is arranged on the left side wall of the electrolytic cell, and the water inlet pipe is connected to a water distributor arranged inside the electrolytic cell. A water outlet pipe is arranged on the right side wall of the electrolytic cell. An electrolytic solution is injected into the electrolytic cell, and FCM-IV particle electrodes are filled in the electrolytic solution. The device further includes electrode plates. One end of a wiring column is connected to the top of the electrode plate, and the other end of the wiring column penetrates through the cell wall and is electrically connected to a power supply. Air distribution pipes are arranged on both the left and right sides of the electrode plates. The air distribution pipes penetrate through the cell wall and are connected to an air source through regulating valves. The present invention solves the problems of difficult cleaning, high power consumption, unstable purification efficiency, and great influence of bubbles and impurities on the reaction efficiency of existing devices, and has good industrial application prospects.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to a three-dimensional electrolytic catalytic oxidation sewage treatment device. Background Art

[0002] The treatment technology for high-difficulty wastewater has always been a difficult point in sewage treatment. The common sewage treatment methods are physical method, chemical method, biological method and the combination of the three methods. As for the existing sewage treatment methods, their treatment steps are too cumbersome, the equipment is relatively complex, the investment and occupied site are too large, and the treatment effect on some high-concentration and biodegradable sewage is not ideal. The commonly used membrane separation process, evaporation process, and adsorption filtration process cannot effectively decompose organic matter and are prone to secondary pollution. The most effective treatment method should be the electrocatalytic sewage treatment device. However, in the existing electrocatalytic sewage treatment devices, the electrode plates are mostly placed in the card slots at both ends of the electrolytic cell, and the electrode plate spacing is single. Either the electrode plate arrangement is dense and the cost is high, or the number of electrode plates is small, so the electric field and current range for wastewater treatment are weak, and it does not adapt to the changing water quality conditions, resulting in incomplete decomposition of organic matter in the wastewater and low electric energy utilization rate; moreover, in the existing electrocatalytic sewage treatment devices, a large number of bubbles and impurities will be generated at the liquid surface during the electrocatalytic process, which will also affect the electrocatalytic reaction and the degree of catalysis; in addition, in the case of high-difficulty wastewater treatment, the electrocatalytic process often causes an increase in resistance due to the generation of oxides and scaling on the electrode plates, and the efficiency of converting electric energy into heat increases, resulting in a significant reduction in the catalytic electric energy utilization rate; the increase in resistance and the decrease in current further lead to a decrease in the electrolysis rate, and the system operation effluent completely fails to meet its strict process requirements. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a three-dimensional electrolytic catalytic oxidation sewage treatment device, which mainly solves the problems in the background art.

[0004] The present invention provides a three-dimensional electrolytic catalytic oxidation sewage treatment device, which includes an electrolytic cell and electrode plates. The electrolytic cell has a cuboid structure, and a sealed cover plate is provided at the top of the electrolytic cell. A water inlet pipe is provided on the left side wall of the electrolytic cell, and the water inlet pipe is connected to a water distributor arranged inside the electrolytic cell. A water outlet pipe is provided on the right side wall of the electrolytic cell. An electrolyte is injected into the electrolytic cell, and FCM-IV particle electrodes are filled in the electrolyte. The electrode plates include a number of high-position electrode plates and a number of low-position electrode plates. The low-position electrode plates are vertically fixed on the bottom wall of the electrolytic cell at a predetermined distance. The height of the low-position electrode plates is flush with the liquid level height of the electrolyte, dividing the interior of the electrolytic cell into a number of cells. The high-position electrode plates are vertically arranged at the middle position of each cell, and the high-position electrode plates are higher than the liquid level height of the electrolyte. A wiring column is provided at the top end of the electrode plates, and the wiring column passes through the front wall of the electrolytic cell and is electrically connected to a power supply. Air distribution pipes are provided on both the left and right sides of the electrode plates, and the air distribution pipes pass through the front wall of the electrolytic cell and are connected to an external air source through air intake regulating valves.

[0005] A further improvement lies in that a water inlet regulating valve and a flowmeter are further provided on the water inlet pipe.

[0006] A further improvement lies in that a reflux water inlet is provided on the left side wall of the electrolytic cell, and a reflux water outlet is provided on the right side wall of the electrolytic cell. The reflux water outlet is connected to the water inlet of an external circulation pump through a pipeline, and the water outlet of the external circulation pump is connected to the reflux water inlet through a pipeline.

[0007] A further improvement lies in that the bottom of the cell is a conical structure that converges towards the center, and a discharge port is provided at the lowest point of the conical structure for discharging the FCM-IV particle electrodes.

[0008] A further improvement lies in that a drain port is provided at the lowest point of the right side wall of the electrolytic cell for discharging the electrolyte.

[0009] A further improvement lies in that a bubble overflow port is provided at the highest point of the right side wall of the motor cell for collecting the foam generated in the electrolytic cell and preventing the foam from flowing randomly.

[0010] A further improvement lies in that a clamping groove is provided at the fitting position between the electrode plates and the electrolytic cell, and the clamping groove is filled and sealed with a silica-based sealant for the electrode plates. The low-position electrode plates and the bottom wall of the electrolytic cell are sealed by inlaying silica-based rubber strips.

[0011] A further improvement lies in that the power supply is a sewage treatment power supply.

[0012] A further improvement is that the electrode plates are titanium plates coated with a ruthenium-iridium coating, and the number of the electrode plates is odd.

[0013] A further improvement is that reinforcing ribs are arranged on the outside of the cell body of the electrolytic cell, at least three reinforcing ribs are arranged from top to bottom, and supporting feet are arranged at the bottom of the electrolytic cell.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The electrode plate of the present invention adopts a metal titanium electrode plate coated with ruthenium and iridium, and is linked with the FCM-IV particle electrode in the electrolyte, which not only solves the problem of high cost caused by too many electrode plates in the existing electrocatalytic sewage treatment device, but also overcomes the problem of electric field weakening caused by reducing the number of electrode plates in similar devices, thereby leading to unsatisfactory sewage treatment effect;

[0016] 2. The FCM-IV particle electrode used in the present invention has certain resistance characteristics. The positive and negative sides of the FCM-IV particle electrode located in the electric field area are prone to form a voltage difference and generate current. The voltage values ​​obtained by the FCM-IV particle electrodes at different distances from the electrode plate are also different. Therefore, the FCM-IV particle electrode presents rich voltage diversity. The FCM-IV particle electrodes carrying different voltage values ​​can quickly and efficiently destroy and decompose harmful substances in sewage, and solve the problems of single electrode plate spacing and low power utilization rate compared to two-dimensional electrodes.

[0017] 3. The FCM-IV particle electrode of the present invention is arranged in the electrolyte of each cell, which increases the contact area with the sewage, enhances the sewage purification efficiency, and can reduce the retention time of the sewage between the particle electrodes, so that the volume scale of the entire sewage treatment device can be smaller, and the construction cost is greatly reduced among the equipment scales with the same treatment capacity;

[0018] 4. The sewage treatment device of the present invention gives full play to the adsorption characteristics of the FCM-IV particle electrode, and can enrich the pollutants in the sewage on the surface of the particle electrode. Since the particle electrode has a very large specific surface area, it can adsorb a large amount of pollutants at the same time. The concentrated adsorption of pollutants can greatly improve the sewage treatment efficiency and reduce the treatment time by 5 to 8 times. At the same time, it can also reduce energy consumption and reduce costs;

[0019] 5. The present invention also utilizes the catalytic characteristics of the FCM-IV particle electrode, enabling the decomposition of high-molecular organic substances that are originally difficult to decompose. With the synergistic adsorption effect of the particle electrode itself and its efficient catalytic characteristics, the particle electrode with a low voltage can also complete the decomposition reaction of pollutants, improving the purification quality. At the same time, the high-efficient catalytic performance of the FCM-IV particle electrode can also reduce the power specification of the power supply supporting the sewage treatment device compared with the existing process, solving the problem of high operating costs caused by excessive power of the power supply.

[0020] 6. The present invention also applies the coagulation characteristics of the FCM-IV particle electrode. Compared with ordinary electrodes or noble metal electrodes, the pollutants after preliminary decomposition will escape to the surface of the FCM-IV particle electrode and dissolve to form flocculants and flocs under the action of current, and are separated in the subsequent precipitation process.

[0021] 7. By virtue of the material characteristics of the FCM-IV particle electrode, namely, no caking, breaking, passivation and other adverse effects will occur, the present invention effectively avoids the blockage of the flow channel and the paralysis of the system, and overcomes the problems of caking, breaking and passivation that are prone to occur in three-dimensional electrodes.

[0022] 8. The present invention adopts an independently controlled aeration distribution method, with controllable and arbitrarily adjustable air flow. Under the action of the air flow, the problem of easy blockage between flow channels is effectively overcome, and the long-term stable smoothness of the water flow channels of the system is maintained.

[0023] 9. The special power supply for sewage treatment configured by the present invention has operating logics such as pulse output, constant voltage, adjustable constant current, electrode commutation, timing, pause, etc., so it can automatically control the output, reduce the power consumption of the power supply, and overcome problems such as concentration polarization and scaling of the electrode plate.

[0024] 10. The present invention solves the problems of difficult cleaning, high power consumption, unstable purification efficiency, and great influence of bubbles and impurities on the reaction efficiency of the existing device, and has good industrial application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For better illustration of this embodiment, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 It is a front structural sectional view of an embodiment of the present invention;

[0028] Figure 3It is a schematic diagram of a top view structure of an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the electrode plate structure according to one embodiment of the present invention;

[0030] Among them: 1. water inlet regulating valve; 2. flow meter; 3. water distributor; 4. terminal; 5. terminal; 6. clamping groove; 7. electrode plate; 8. gas distribution pipe; 9. FCM-IV particle electrode; 10. sealing cover; 11. bubble overflow outlet; 12. water outlet pipe; 13. reinforcing rib; 14. reflux outlet; 15. vent; 16. supporting foot; 17. discharge outlet; 18. plugging plate; 19. reflux inlet; 20. electrolytic cell; 21. water inlet pipe; 22. current guide plate; 23. pole baffle. DETAILED DESCRIPTION

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be said that the internal connection of two components is connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments.

[0032] It should be known that, compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. The electrode plate 7 of the present invention adopts a metal titanium electrode plate coated with ruthenium and iridium, and is linked with the FCM-IV particle electrode 9 in the electrolyte, which not only solves the problem of high cost caused by the excessive number of electrode plates 7 in the existing electrocatalytic sewage treatment device, but also overcomes the problem of electric field weakening caused by reducing the number of electrode plates 7 in similar devices, thereby leading to unsatisfactory sewage treatment effect;

[0034] 2. The FCM-IV particle electrode 9 used in the present invention has certain resistance characteristics. The positive and negative sides of the FCM-IV particle electrode 9 located in the electric field area are prone to form a voltage difference and generate current. The voltage values ​​obtained by the FCM-IV particle electrodes 9 at different distances from the electrode plate 7 are also different. Therefore, the FCM-IV particle electrode 9 presents rich voltage diversity. The FCM-IV particle electrodes 9 carrying different voltage values ​​can quickly and efficiently destroy and decompose harmful substances in sewage, and solve the problems of single spacing between the electrode plates 7 and low power utilization rate relative to the two-dimensional electrode;

[0035] 3. The FCM-IV particle electrode 9 of the present invention is disposed in the electrolyte of each cell, increasing the contact area with the sewage, enhancing the sewage purification efficiency, and reducing the residence time of the sewage between the particle electrodes, so that the volume scale of the entire sewage treatment device can be smaller, and the construction cost is greatly reduced among equipment scales with the same treatment capacity;

[0036] 4. The sewage treatment device of the present invention gives full play to the adsorption characteristics of the FCM-IV particle electrode 9, and can enrich the pollutants in the sewage on the surface of the particle electrode. Since the specific surface area of the particle electrode is extremely large, a large amount of pollutants can be adsorbed simultaneously. The concentrated adsorption of pollutants can greatly improve the sewage treatment efficiency, reduce the treatment time by 5 to 8 times, and at the same time reduce energy consumption and cost;

[0037] 5. The present invention simultaneously utilizes the catalytic characteristics of the FCM-IV particle electrode 9, so that the high-molecular organic matter that is originally difficult to decompose, under the synergistic adsorption effect of the particle electrode itself, and with its high-efficiency catalytic characteristics, the particle electrode with a low voltage can also complete the decomposition reaction of pollutants, improving the purification quality; at the same time, the high-efficiency catalytic performance of the FCM-IV particle electrode 9 can also make the power supply power specification of the sewage treatment device lower than that of the existing process, and can solve the problem of high operating cost caused by too high power supply power;

[0038] 6. The present invention also utilizes the coagulation characteristics of the FCM-IV particle electrode 9. Compared with ordinary electrodes or noble metal electrodes, the pollutants after preliminary decomposition will escape to the surface of the FCM-IV particle electrode 9 and dissolve under the action of current to form a flocculant and flocs, which are separated in the subsequent precipitation process;

[0039] 7. By virtue of the material characteristics of the FCM-IV particle electrode 9, that is, no caking, breaking, passivation and other adverse effects occur, the present invention effectively avoids the blockage of the flow channel and the paralysis of the system, and overcomes the problems of caking, breaking and passivation that are prone to occur in three-dimensional electrodes;

[0040] 8. The present invention adopts an independently controlled aeration distribution method, and the air flow rate is controllable and can be adjusted arbitrarily. Under the action of the air flow, the problem of easy blockage between the flow channels is effectively overcome, and the long-term stable and unobstructed flow channels of the system water flow are maintained;

[0041] 9. The special power supply for sewage treatment configured by the present invention has operating logics such as pulse output, constant voltage, adjustable constant current, electrode commutation, timing, and pause. Therefore, it can automatically control the output, reduce the power consumption of the power supply, and overcome problems such as concentration polarization and scaling of the electrode plate 7;

[0042] 10. The present invention solves the problems of the existing device being difficult to clean, having high power consumption and energy consumption, unstable purification efficiency, and the bubbles and impurities greatly affecting the reaction efficiency, and has good industrial application prospects.

[0043] Referring to Figures 1-4 , the present invention discloses a three-dimensional electrolytic catalytic oxidation sewage treatment device, including an electrolytic cell 20. The electrolytic cell 20 is of a cuboid structure. A sealing cover plate 10 is arranged at the top of the electrolytic cell 20. A water inlet pipe 21 is arranged on the left side wall of the electrolytic cell 20. The water inlet pipe 21 is connected to a water distributor 3 arranged inside the electrolytic cell 20. An outlet pipe 12 is arranged on the right side wall of the electrolytic cell 20. An electrolytic solution is injected into the electrolytic cell 20, and FCM-IV particle electrodes 9 are filled in the electrolytic solution; it further includes electrode plates 7. The electrode plates 7 include a high-level electrode plate and a low-level electrode plate. The low-level electrode plate is vertically arranged on the bottom of the electrolytic cell 20 at a fixed distance. The height of the low-level electrode plate is flush with the liquid level height of the electrolytic solution, and the low-level electrode plate and the bottom of the electrolytic cell 20 are sealed by inlaying silica gel strips, dividing the interior of the electrolytic cell 20 into several cells. The high-level electrode plate is vertically arranged at the middle position of each cell. The high-level electrode plate is higher than the liquid level height of the electrolytic solution. One end of a connection post 4 is connected to the top end of the electrode plate 7, and the other end of the connection post 4 penetrates through the cell wall of the electrolytic cell 20 and is electrically connected to a power source; gas distribution pipes 8 are arranged on both the left and right sides of the electrode plate 7. The gas distribution pipes 8 penetrate through the cell wall of the electrolytic cell 20 and are connected to an external gas source through an intake air regulating valve.

[0044] It can be understood that in the embodiment of the present invention, the electrolytic cell 20 is a cuboid tank structure welded by insulating plastic plates made of PP material. Preferably, the ratio of the length, width, and height of the electrolytic cell 20 can be 2:2:1. The water inlet pipe 21 is the sewage inlet of this sewage treatment device. The water inlet pipe 21 is made of PP material. It passes through the tank body and is welded to the tank body to form a seal. The water inlet pipe 21 enters the water distributor 3 inside the electrolytic cell 20, and the sewage to be treated is evenly distributed into the water inlet unit in the electrolytic cell 20 through the water distributor 3.

[0045] It can be understood that in the embodiment of the present invention, the FCM-IV particle electrodes 9 are filled in the electrolytic solution and are evenly separated by each cell. It should be noted that the filling height of the FCM-IV particle electrodes 9 should be 5-10 cm lower than the outlet pipe 12.

[0046] It can be understood that in the embodiments of the present invention, the electrode plate 7 includes a high-level plate and a low-level plate, and the two types of plates have the same material and size. The low-level plate and the high-level plate are arranged in a high-low alternating manner with the high-level plate as the head and tail at the same distance inside the electrolytic cell 20. The positive and negative electrodes also alternate front and back, and there is no priority for positive and negative. Among them, the low-level plate is flush with the bottom inside the electrolytic cell 20 and is inlaid with a silica gel strip for sealing, while the high-level plate is set at a position a certain distance above the liquid level of the electrolyte, and the joint between the electrode plate 7 and the inner wall of the electrolytic cell 20 is sealed to ensure that the sewage to be treated flows around up and down in the flow channel formed between the electrolytic cell 20 and the electrode plate 7. Specifically, the specifications of the flow channel determine whether the water flow has sufficient velocity to overcome sedimentation and blockage problems, and due to the long flow channel formed by the up and down flow around, the residence time is extended, preventing the water flow from short-circuiting and reacting insufficiently with the electrolytic cell 20, resulting in low purification efficiency. More specifically, in the embodiments of the present invention, the height of the electrolytic cell 20 is between 0.4 and 0.8 m, and the high-level plate can be selectively 5 to 10 cm higher than the liquid level of the electrolyte.

[0047] Referring to Figure 4 , it can be understood that in the embodiments of the present invention, one end of the wiring post 4 is connected to the top end of the electrode plate 7, and a current guiding piece 22 is also arranged between the wiring post 4 and the electrode plate 7 for current guiding. The other end of the wiring post 4 is the power supply access point, and the power supply access point passes through the cell wall of the electrolytic cell 20 and is electrically connected to an external power supply, and the connection method can be a threaded connection. Specifically, the other end of the wiring post 4 passes through the cell wall of the electrolytic cell 20, and a pole baffle and a wiring end 5 with threads are arranged at the passing position, and after embedding a silica gasket, a nut is tightened on the outside of the electrolytic cell 20 for locking and sealing to ensure the tightness inside the electrolytic cell 20 and prevent the leakage of the electrolyte. More specifically, the wiring post 4 should be 10 to 30 cm higher than the liquid level of the electrolyte.

[0048] More specifically, the wiring post 4 is made of titanium-clad copper, and the size of the titanium-clad copper wiring post 4 is selected with reference to the ratio of the current A to the area m2 of the unit electrode plate 7, which is 100 A / m2.

[0049] It can be understood that in the embodiments of the present invention, air distribution pipes 8 are provided on both the left and right sides of the electrode plate 7. The air distribution pipes 8 penetrate through the cell wall of the electrolytic cell 20 and act on the cells on both sides of the electrode plate 7 during aeration. The air distribution pipes 8 are made of PP material, and the positions where the air distribution pipes 8 penetrate through the cell wall of the electrolytic cell 20 are connected by welding to form a seal. Specifically, the sewage and FCM-IV particle electrodes 9 in each cell are stirred by aeration on both the left and right sides of the electrode plate 7, so that the particle electrodes maintain a large gap state, increasing the reaction area and ensuring smooth flow channels at the same time. More specifically, the aeration volume of the air distribution pipes 8 can be adjusted by an external intake regulating valve to meet the backwashing intensity. And the impact of the gas can cause the flocs carried in the water flow to be discharged from the outlet pipe 12, preventing them from being intercepted by the particle electrodes and accumulating into sludge.

[0050] More specifically, the aeration volume can preferably be 2 - 15 L / m2·s.

[0051] As a preferred embodiment of the present invention, a water inlet regulating valve 1 and a flow meter 2 are further provided on the water inlet pipe 21.

[0052] It can be understood that in the embodiments of the present invention, both the water inlet regulating valve 1 and the flow meter 2 are used to conveniently adjust the input of the flow rate according to the size of the electrolytic cell 20 and the quality of the influent and effluent water.

[0053] As a preferred embodiment of the present invention, a return water inlet 19 is provided on the left cell wall of the electrolytic cell 20, and a return water outlet 14 is provided on the right cell wall of the electrolytic cell 20. The return water outlet 14 is connected to the inlet of an external circulation pump through a pipeline, and the outlet of the external circulation pump is connected to the return water inlet 19 through a pipeline.

[0054] It can be understood that in the embodiments of the present invention, a circulation unit is provided outside the electrolytic cell 20. The circulation unit includes the above-mentioned return water inlet 19, return water outlet 14 and external circulation pump. The external circulation pump can reflux the electrolyte solution in the electrolytic cell 20 at the circulation inlet and outlet, increasing the flow rate in the flow channel and preventing the formation of water flow dead zones in the flow channel, which may lead to a reduction in the sewage purification efficiency.

[0055] As a preferred embodiment of the present invention, the bottom of the cell is a conical structure that converges towards the center, and a discharge port 17 is provided at the lowest point of the conical structure. The discharge port 17 is used to discharge the FCM-IV particle electrodes 9.

[0056] It can be understood that in the embodiments of the present invention, at the lower end of each cell is a conical structure, and at the lowest point of the conical structure is provided a discharge port 17 for discharging the FCM-IV particle electrodes 9 filled between the cells. And at the discharge port 17 is provided a 3-inch flange port, and at the outlet of the flange port is provided a blanking plate 18. Specifically, the 3-inch flange port is 30 cm from the ground.

[0057] As a preferred embodiment of the present invention, at the lowest point of the right side wall of the electrolytic cell 20 is provided an air vent 15 for discharging the electrolyte solution.

[0058] As a preferred embodiment of the present invention, at the highest point of the right side wall of the motor cell is provided a bubble overflow port 11 for collecting the foam generated in the electrolytic cell 20 to prevent the foam from flowing turbulently.

[0059] It can be understood that in the embodiments of the present invention, the bubble overflow port 11 can collect and defoam the foam generated by the reaction through the aeration air flow to prevent the foam from getting out of control due to excessive amount. At the same time, the aeration air flow dilutes the hydrogen and oxygen generated by electrolysis in the electrolytic cell 20, and can also prevent the gas ratio in the electrolytic cell 20 from reaching the explosion limit and causing danger.

[0060] As a preferred embodiment of the present invention, at the fitting part of the electrode plate 7 and the electrolytic cell 20 is provided a clamping groove 6, and the clamping groove 6 is filled and sealed with the electrode plate 7 using silica sealant.

[0061] As a preferred embodiment of the present invention, the power supply is a sewage treatment power supply.

[0062] It can be understood that in the embodiments of the present invention, the sewage treatment power supply is a special power supply for high-frequency pulsed water treatment. Compared with the traditional DC power supply, it can supply power in a timed pulsed manner and can switch the polarity of the power output at a fixed time. Therefore, it can reduce the concentration polarization caused by the difference between the ion concentration in the solution of the electrode interface layer and the concentration of the bulk solution, resulting in the deviation of the electrode potential from the equilibrium potential. At the same time, it can reduce the unit energy consumption by 20% - 40%, and at the same time overcome the problems of scaling and passivation of the electrode plate 7.

[0063] As a preferred embodiment of the present invention, the electrode plate 7 is a titanium electrode plate coated with a ruthenium-iridium coating, and the number of the electrode plates 7 is an odd number.

[0064] As a preferred embodiment of the present invention, on the outer side of the tank body of the electrolytic cell 20 is provided a reinforcing rib 13, and there are at least 3 reinforcing ribs 13 arranged from top to bottom. At the bottom of the electrolytic cell 20 are provided support feet 16.

[0065] In the figure, the description of the positional relationship is only for illustrative purposes and should not be construed as a limitation of this patent; obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A three-dimensional electrolytic catalytic oxidation sewage treatment device, characterized in that, it includes an electrolytic cell (20) and electrode plates (7). The electrolytic cell (20) has a cuboid structure. A sealing cover plate (10) is arranged at the top of the electrolytic cell (20). A water inlet pipe (21) is arranged on the left side wall of the electrolytic cell (20). The water inlet pipe (21) is connected to a water distributor (3) arranged inside the electrolytic cell (20). A water outlet pipe (12) is arranged on the right side wall of the electrolytic cell (20). An electrolytic solution is injected into the electrolytic cell (20), and FCM-IV particle electrodes (9) are filled in the electrolytic solution; the electrode plates (7) include a number of high-position electrode plates and a number of low-position electrode plates. The low-position electrode plates are vertically fixed on the bottom wall of the electrolytic cell (20) at a predetermined distance. The height of the low-position electrode plates is flush with the liquid level height of the electrolytic solution, dividing the interior of the electrolytic cell (20) into a number of cells. The high-position electrode plates are vertically arranged at the middle position of each cell. The bottom of the cell is a conical structure that converges towards the center. A discharge port (17) is arranged at the lowest point of the conical structure. The discharge port (17) is used to discharge the FCM-IV particle electrodes (9); the low-position electrode plates and high-position electrode plates are arranged at the front and back with the same distance and alternate in height inside the electrolytic cell (20). The low-position electrode plates are flush and aligned with the bottom inside the electrolytic cell (20) and are inlaid with silica rubber strips for sealing; the high-position electrode plates are arranged at a position 5-10 cm higher than the liquid level height of the electrolytic solution and the joint between the electrode plates (7) and the inner wall of the electrolytic cell (20) is sealed to ensure that the sewage to be treated flows around up and down in the flow channel formed by the electrolytic cell (20) and the electrode plates (7); a wiring column (4) is arranged at the top of the electrode plates (7). The wiring column (4) passes through the front wall of the electrolytic cell (20) and is electrically connected to a power source; air distribution pipes (8) are arranged on both the left and right sides of the electrode plates (7). The air distribution pipes (8) pass through the front wall of the electrolytic cell (20) and are connected to an external air source through an air intake regulating valve; a reflux water inlet (19) is arranged on the left side wall of the electrolytic cell (20). A reflux water outlet (14) is arranged on the right side wall of the electrolytic cell (20). The reflux water outlet (14) is connected to the water inlet of an external circulation pump through a pipeline. The water outlet of the external circulation pump is connected to the reflux water inlet (19) through a pipeline; a drain port (15) is arranged at the lowest point of the right side wall of the electrolytic cell (20). The drain port (15) is used to discharge the electrolytic solution; the FCM-IV particle electrodes (9) are filled in the electrolytic solution and are evenly separated by each cell; the filling height of the FCM-IV particle electrodes (9) is 5-10 cm lower than the water outlet pipe (12); a current guiding sheet (22) is also arranged between the wiring column (4) and the electrode plates (7). The wiring column (4) is 10-30 cm higher than the liquid level height of the electrolytic solution; the electrode plates (7) are titanium electrode plates coated with a ruthenium-iridium coating, and the number of the electrode plates (7) is odd.

2. A three-dimensional electrolytic catalytic oxidation sewage treatment device according to claim 1, characterized in that, an inlet regulating valve (1) and a flow meter (2) are further provided on the water inlet pipe (21).

3. A three-dimensional electrolytic catalytic oxidation sewage treatment device according to claim 1, characterized in that, a bubble overflow port (11) is provided at the highest position of the right side wall of the electrolytic cell (20), and the bubble overflow port (11) is used to collect the foam generated in the electrolytic cell (20) to prevent the foam from flowing turbulently.

4. A three-dimensional electrolytic catalytic oxidation sewage treatment device according to claim 1, characterized in that, a clamping groove (6) is provided at the fitting part of the electrode plate (7) and the electrolytic cell (20), and the clamping groove (6) is filled and sealed with the electrode plate (7) by using silicon sealant, and the low-position electrode plate and the bottom wall of the electrolytic cell (20) are sealed by inlaying silicon rubber strips.

5. A three-dimensional electrolytic catalytic oxidation sewage treatment device according to claim 1, characterized in that, the power supply is a sewage treatment power supply.

6. A three-dimensional electrolytic catalytic oxidation sewage treatment device according to claim 1, characterized in that, reinforcing ribs (13) are provided on the outer side of the tank body of the electrolytic cell (20), at least 3 reinforcing ribs (13) are provided, and support feet (16) are provided at the bottom of the electrolytic cell (20).

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