Medical sewage electro-catalysis treatment device and method

Abstract

The invention relates to an electrocatalytic treatment device and method for medical sewage. The device comprises an electrocatalytic oxidation tank and desilting equipment, a water inlet nozzle is arranged at the bottom of the electrocatalytic oxidation tank, the water outlet direction of the water inlet nozzle is perpendicular to the radial direction of the electrocatalytic oxidation tank, the water inlet nozzle is connected with a water inlet pipe, and a booster pump and an ozone supply mechanism are arranged on the water inlet pipe; a cathode plate and an anode plate are arranged in the electrocatalytic oxidation tank; a water outlet is formed in the side wall of the upper part of the electrocatalytic oxidation tank; and the cathode plate and the anode plate are net-shaped plates. The negative plates and the positive plates are arranged to be net-shaped, when rotational flow medical sewage reaches the negative plates and the positive plates, the medical sewage can penetrate through the negative plates and the positive plates, the resistance of the negative plates and the positive plates to the sewage is reduced, and it is ensured that the medical sewage can be kept in a rotational flow state when passing through the negative plates and the positive plates; therefore, sewage and ozone are promoted to quickly and uniformly contact with the cathode plate and the anode plate, the effect of electro-catalytic ozone is ensured, and the decomposition speed of organic matters is accelerated.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular to a device and method for electrocatalytic treatment of medical sewage. Background Art

[0002] The composition of sewage from medical institutions is complex, involving a variety of biological, chemical or radioactive pollution. In addition to containing a large number of pathogens such as bacteria, viruses, and insect eggs, it also contains a variety of chemical agents. The sewage has poor biodegradability and has the characteristics of spatial pollution, acute infection, and latent infection. In addition, the existing medical sewage discharge standard implements the "Medical Institution Water Pollutant Discharge Standard" (GB18466-2005), and the removal of new toxic and difficult-to-degrade pollutants such as antibiotics and resistance genes, drugs and their metabolites, iodide contrast agents, and disinfection by-products has not yet been clearly regulated. As a result, the existing conventional treatment technology only performs simple primary treatment or disinfection on hospital sewage before discharging it into the urban pipe network, without effective treatment and disposal.

[0003] Electrocatalytic oxidation treatment technology can effectively decompose organic matter in medical wastewater and kill pathogens. For example, CN202310016399.1 discloses a medical wastewater treatment device and method, and CN202310799237.X discloses an integrated sewage deep treatment equipment and sewage treatment process. Oxidants such as ozone and persulfate can generate sulfate radicals (SO4) with strong oxidizing properties under the action of electrocatalysis. ·- ), hydroxyl radicals ( · OH), active oxygen and other substances, which can decompose organic matter. In addition, the traditional electrode plate is a rectangular plate, and the sewage can only pass through the gap between the cathode plate and the anode plate. The sewage has poor fluidity and cannot fully contact the electrode, which has an adverse effect on the sewage treatment effect and efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a device and method for electrocatalytic treatment of medical wastewater, which can improve the treatment effect and efficiency of medical wastewater.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: a medical wastewater electrocatalytic treatment device, including an electrocatalytic oxidation tank and a mud removal device;

[0006] The bottom side wall of the electrocatalytic oxidation tank is provided with a plurality of water inlet nozzles, the water outlet direction of the water inlet nozzles is perpendicular to the radial direction of the electrocatalytic oxidation tank, the water inlet nozzles are connected to a water inlet pipe, a pressure pump is provided on the water inlet pipe, and the water inlet pipe between the pressure pump and the water inlet nozzles is connected to an ozone supply mechanism;

[0007] A plurality of vertically arranged cathode plates and anode plates are arranged in the electrocatalytic oxidation tank, the cathode plates and anode plates are arranged alternately, and there is a spacing between the cathode plates and the anode plates;

[0008] The upper side wall of the electrocatalytic oxidation tank is provided with a water outlet, and the water outlet is connected to the mud removal equipment;

[0009] The cathode plate and the anode plate are mesh plates.

[0010] Furthermore, the cathode plate and the anode plate are iron plates.

[0011] Furthermore, a circulation pipe is arranged outside the electrocatalytic oxidation tank, the upper end of the circulation pipe is connected to the electrocatalytic oxidation tank above the cathode plate and the anode plate, the lower end of the circulation pipe is connected to the electrocatalytic oxidation tank at the cathode plate and the anode plate, and the water outlet direction of the lower end of the circulation pipe is perpendicular to the radial direction of the electrocatalytic oxidation tank, and a circulation pump is arranged on the circulation pipe.

[0012] Furthermore, a first interception net is arranged below the cathode plate and the anode plate, a plurality of cleaning balls with a density less than that of water are arranged in the electrocatalytic oxidation tank above the first interception net, a second interception net is arranged at the upper end of the circulation pipe, the water outlet is connected to a separation bin, the bottom of the separation bin is connected to the mud removal equipment through a water pipe, an arc-shaped third interception net is arranged in the separation bin, one end of the third interception net is connected to an inclined delivery pipe, and the lower end of the delivery pipe is connected to the circulation pipe.

[0013] Furthermore, the cleaning ball comprises an elastic mesh shell, a ferrous silicate particle layer and a hollow floating ball which are sequentially arranged from the outside to the inside.

[0014] Furthermore, the inner wall of the electrocatalytic oxidation tank is provided with a circular lower support ring and an upper support ring, and the lower support ring is fixed to the inner wall of the electrocatalytic oxidation tank; an electrode mounting frame is provided in the electrocatalytic oxidation tank, and the electrode mounting frame includes a bottom ring plate, and a lower positioning sleeve is provided on the upper surface of the bottom ring plate, and a plurality of first slots are provided on the inner wall of the lower positioning sleeve; a plurality of vertical connecting columns are provided on the bottom ring plate, and an upper positioning sleeve is fixedly provided on the top of the connecting column, and a plurality of second slots are provided on the inner wall of the upper positioning sleeve, and the lower ends of the cathode plate and the anode plate are plugged into the first slots, and the upper ends of the cathode plate and the anode plate are plugged into the second slots; the upper support ring is detachably installed on the inner wall of the electrocatalytic oxidation tank, and a first plane bearing is provided on the lower surface of the upper support ring, and the first plane bearing presses the upper positioning sleeve; the bottom ring plate is installed on the lower support ring through the second plane bearing.

[0015] Furthermore, the mud removal equipment is a sedimentation tank, and a mud discharge mechanism is provided at the bottom of the sedimentation tank.

[0016] Furthermore, the mud removal equipment includes a flexible filter cloth and a vertically arranged filter cartridge, the bottom of the filter cartridge is sealed by a bottom plate, a vertical first cylinder and a second cylinder are arranged in the filter cartridge, the first cylinder is located inside the second cylinder, and the lower end of the first cylinder is connected to the lower end of the second cylinder through a circular support plate, the upper end of the second cylinder is connected to the upper end of the filter cartridge through a circular top plate, the upper end of the first cylinder is lower than the upper end of the second cylinder, and a detachable cover is arranged on the upper port of the second cylinder, and a water inlet cavity is formed between the first cylinder and the second cylinder, and a water inlet cavity is arranged on the cover A water inlet hole connected to the water inlet cavity is provided; through holes are provided on the first cylinder, the second cylinder and the support plate; the filter cloth includes an outer filter cartridge, a bottom horizontal section, an inner filter cartridge and a top horizontal section that are integrally formed, the outer filter cartridge covers the inner wall of the second cylinder, the bottom horizontal section covers the support plate, the inner filter cartridge covers the outer wall of the first cylinder, the top horizontal section covers the upper port of the first cylinder, the upper end edge of the outer filter cartridge is turned outward to cover the upper end surface of the second cylinder, and the upper end turn-over of the outer filter cartridge is pressed by the cover plate, and an elastic sealing pad is provided on the lower surface of the cover plate; a clean water outlet is provided on the filter cartridge.

[0017] The electrocatalytic treatment method of medical wastewater of the above-mentioned electrocatalytic treatment device for medical wastewater is as follows: the medical wastewater to be treated is introduced into a water inlet pipe, and ozone is introduced into the water inlet pipe at the same time, and the medical wastewater is transported to the water inlet nozzle by a pressure pump, so that the flow rate of the medical wastewater when it is sprayed out from the water inlet nozzle is greater than or equal to 10 m / s, and the medical wastewater spirally rises to the cathode plate and the anode plate in the electrocatalytic oxidation tank, and the medical wastewater passes through the holes on the cathode plate and the anode plate and maintains a swirling flow, and under the electrocatalytic action of the cathode plate and the anode plate, the ozone decomposes to produce hydroxyl free radicals, and the hydroxyl free radicals decompose organic matter in the medical wastewater.

[0018] The beneficial effects of the present invention are as follows: the present invention utilizes multiple water inlet nozzles to pass medical sewage into the electrocatalytic oxidation tank. Since the water spraying direction of the water inlet nozzles is perpendicular to the radial direction of the electrocatalytic oxidation tank, a vortex will be formed after the medical sewage enters the electrocatalytic oxidation tank, thereby promoting full mixing of the medical sewage and ozone. In addition, the present invention arranges the cathode plate and the anode plate in a mesh shape, that is, the cathode plate and the anode plate are provided with multiple holes. When the swirling medical sewage reaches the cathode plate and the anode plate, the medical sewage can pass through the cathode plate and the anode plate through the holes, thereby reducing the resistance of the cathode plate and the anode plate to the sewage, thereby ensuring that the medical sewage can also remain in a swirling state when passing through the cathode plate and the anode plate, thereby prompting the sewage and ozone to quickly and evenly contact the cathode plate and the anode plate, thereby ensuring the effect of electrocatalytic ozone, and improving the hydroxyl radical ( · OH) generation efficiency, thereby accelerating the decomposition of organic matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the present invention;

[0020] Figure 2 is a schematic diagram of a cathode plate and an anode plate of the present invention;

[0021] Figure 3 It is a top view schematic diagram of the water inlet nozzle;

[0022] Figure 4 It is a schematic diagram of a cleaning ball;

[0023] Figure 5 It is a schematic diagram of the installation of cathode plate and anode plate;

[0024] Figure 6 yes Figure 5 Schematic cross-sectional view of AA in the figure;

[0025] Figure 7 It is a schematic diagram of a mud removal device;

[0026] Figure 8 It is a schematic diagram of another type of mud removal equipment; DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] The electrocatalytic treatment device for medical wastewater of the present invention is as follows: Figure 1 , Figure 2 and Figure 3 As shown, it includes an electrocatalytic oxidation tank 1 and a mud removal device 2. The electrocatalytic oxidation tank 1 adopts a circular tank body, which is vertically arranged and supported by a group of supporting legs. The upper and lower ends of the electrocatalytic oxidation tank 1 can be sealed by a head.

[0029] A plurality of water inlet nozzles 3 are arranged on the bottom side wall of the electrocatalytic oxidation tank 1, the water outlet direction of the water inlet nozzles 3 is perpendicular to the radial direction of the electrocatalytic oxidation tank 1, the water inlet nozzles 3 are connected to a water inlet pipe 4, a booster pump 5 is arranged on the water inlet pipe 4, and an ozone supply mechanism 6 is connected to the water inlet pipe 4 between the booster pump 5 and the water inlet nozzles 3.

[0030] The water inlet pipe 4 can be connected to the medical sewage collection pool to transport the medical sewage to the water inlet nozzle 3. The water inlet nozzle 3 can be a 90-degree elbow fixed on the inner wall of the electrocatalytic oxidation tank 1. The water inlet nozzle 3 can be 3, 4, etc., evenly distributed. Since the water outlet direction of the water inlet nozzle 3 is perpendicular to the radial direction of the electrocatalytic oxidation tank 1, after the medical sewage enters the electrocatalytic oxidation tank 1 from the water inlet nozzle 3, the flow direction is also perpendicular to the radial direction of the electrocatalytic oxidation tank 1, and it will flow along the circumference of the electrocatalytic oxidation tank 1, thereby forming a vortex. The booster pump 5 is used to pressurize the medical sewage and increase the flow speed of the medical sewage, so that the medical sewage enters the electrocatalytic oxidation tank 1 at a flow rate of about 10m / s, effectively forming a vortex. The ozone supply mechanism 6 is used to supply ozone, and existing ozone generators and other equipment can be used.

[0031] In order to catalyze ozone, a plurality of vertically arranged cathode plates 7 and anode plates 8 are arranged in the electrocatalytic oxidation tank 1. The cathode plates 7 and anode plates 8 are arranged alternately, and there is a gap between the cathode plates 7 and anode plates 8. The cathode plates 7 and anode plates 8 are respectively connected to the negative pole and the positive pole of a DC power supply, and can catalyze ozone after power is turned on.

[0032] The upper side wall of the electrocatalytic oxidation tank 1 is provided with a water outlet 9, which is connected to the mud removal device 2 and is used to transport the medical sewage after oxidation treatment to the mud removal device 2. The mud removal device 2 is used to remove solid impurities in the sewage to obtain clean water.

[0033] The conventional cathode plate 7 and anode plate 8 are usually rectangular plates without holes. When the medical sewage reaches the cathode plate 7 and anode plate 8, it can only pass through the gap between the cathode plate 7 and anode plate 8, but cannot pass through the cathode plate 7 and anode plate 8. The cathode plate 7 and anode plate 8 have a large resistance to the flow of sewage, and the sewage cannot maintain a swirling flow. The present invention changes the cathode plate 7 and anode plate 8 into a rectangular plate as shown in FIG. Figure 2 The mesh plate shown in the figure is provided with a plurality of holes on the cathode plate 7 and the anode plate 8, through which the medical sewage can pass, thereby reducing the flow resistance to the medical sewage, so that the medical sewage can maintain a swirling state, thereby ensuring that ozone can contact the cathode plate 7 and the anode plate 8 faster and more evenly, thereby generating hydroxyl radicals faster and more evenly ( · OH), while hydroxyl radicals ( · OH) can contact the organic matter and other pollutants in the sewage faster and more evenly, thus ensuring the decomposition efficiency and effect of the pollutants.

[0034] The electrocatalytic treatment method for medical wastewater of the present invention is as follows: the medical wastewater to be treated is introduced into a water inlet pipe 4, ozone is introduced into the water inlet pipe 4 at the same time, and the medical wastewater is transported to a water inlet nozzle 3 by a pressure pump 5, so that the flow rate of the medical wastewater when sprayed out from the water inlet nozzle 3 is greater than or equal to 10 m / s, the medical wastewater spirally rises to the cathode plate 7 and the anode plate 8 in the electrocatalytic oxidation tank 1, and the medical wastewater passes through the holes on the cathode plate 7 and the anode plate 8 and maintains a swirling flow, under the electrocatalytic action of the cathode plate 7 and the anode plate 8, the ozone is decomposed to produce hydroxyl free radicals, and the hydroxyl free radicals decompose organic matter in the medical wastewater.

[0035] In the present invention, the cathode plate 7 and the anode plate 8 are iron plates. The manufacturing cost of the iron electrode is very low and will not cause secondary pollution to the sewage.

[0036] In order to further ensure that the medical sewage is in a swirling state at the cathode plate 7 and the anode plate 8, the present invention is provided with a circulation pipe 10 outside the electrocatalytic oxidation tank 1, the upper end of the circulation pipe 10 is connected to the electrocatalytic oxidation tank 1 above the cathode plate 7 and the anode plate 8, the lower end of the circulation pipe 10 is connected to the electrocatalytic oxidation tank 1 at the cathode plate 7 and the anode plate 8, and the water outlet direction of the lower end of the circulation pipe 10 is perpendicular to the radial direction of the electrocatalytic oxidation tank 1, and a circulation pump 11 is provided on the circulation pipe 10. The upper end of the circulation pipe 10 is lower than the water outlet 9, and the shape of the lower end of the circulation pipe 10 can be similar to the water inlet nozzle 3. After the circulation pump 11 is started, the water above the cathode plate 7 and the anode plate 8 can be sucked into the circulation pipe 10, and then accelerated to spray out from the lower end of the circulation pipe 10. Since the water outlet direction of the lower end of the circulation pipe 10 is perpendicular to the radial direction of the electrocatalytic oxidation tank 1, it will promote the rotation of the sewage in the electrocatalytic oxidation tank 1, that is, maintain the swirling flow of the sewage. Part of the sewage returns to the cathode plate 7 and the anode plate 8 again through the circulation pipe 10, achieving secondary treatment and ensuring the treatment effect.

[0037] During the operation of the iron electrode, iron mud is generated, and the iron mud adheres to the surface of the iron electrode. After a period of operation, it will affect the contact between ozone and the electrode, thereby affecting the electrocatalytic effect. In order to remove the iron mud on the surface of the cathode plate 7 and the anode plate 8 or other solid impurities in the sewage, the present invention is provided with a first interception net 12 below the cathode plate 7 and the anode plate 8, and a plurality of cleaning balls 13 with a density less than water are provided in the electrocatalytic oxidation tank 1 above the first interception net 12. The upper port of the circulation pipe 10 is provided with a second interception net 14, and the water outlet 9 is connected to a separation chamber 16. The bottom of the separation chamber 16 is connected to the mud removal device 2 through a water pipe 15. An arc-shaped third interception net 17 is provided in the separation chamber 16, and one end of the third interception net 17 is connected to an inclined delivery pipe 18, and the lower end of the delivery pipe 18 is connected to the circulation pipe 10.

[0038] The mesh diameters of the first interception net 12, the second interception net 14 and the third interception net 17 are smaller than the outer diameter of the cleaning ball 13. The first interception net 12 can prevent the cleaning ball 13 from moving under the first interception net 12; the second interception net 14 can prevent the cleaning ball 13 from entering the circulation pump 11 and causing blockage or damage to the circulation pump 11; the third interception net 17 can prevent the cleaning ball 13 from entering the water pipe 15, ensuring that the cleaning ball 13 can enter the electrocatalytic oxidation tank 1 through the circulation pipe 10 to achieve circulation motion. Since the density of the cleaning ball 13 is less than that of water, it will float to the surface of the sewage and be discharged from the outlet 9 to the separation chamber 16 with the sewage. After being intercepted by the third interception net 17, the cleaning ball 13 stays on the third interception net 17, then rolls along the third interception net 17 to the delivery pipe 18, and enters the circulation pipe 10 along the delivery pipe 18, and then enters the electrocatalytic oxidation tank 1 with the high-speed flowing water and moves with the water flow. When the cleaning ball 13 contacts the cathode plate 7 and the anode plate 8, it collides with the cathode plate 7 and the anode plate 8, so that the solid impurities such as iron mud on the surface of the cathode plate 7 and the anode plate 8 are separated, and the cathode plate 7 and the anode plate 8 are cleaned. As the movement speed of the cleaning ball 13 decreases, the cleaning ball 13 gradually floats to the liquid surface and enters the separation chamber 16 again to achieve circulation.

[0039] In the present invention, the cleaning ball 13 can be a lightweight elastic sphere, such as a hollow plastic ball, a rubber ball, etc., as a preferred embodiment. Figure 4 As shown, the cleaning ball 13 includes an elastic mesh shell 131, an iron silicate particle layer 132 and a hollow float 133 arranged in sequence from the outside to the inside. The elastic mesh shell 131 can be made of plastic or other materials, and the iron silicate particle layer 132 is composed of a plurality of iron silicate particles, and the particle size of the iron silicate particles is larger than the mesh diameter of the elastic mesh shell 131. The hollow float 133 can be made of a plastic ball, a rubber ball, etc. Iron silicate can also catalyze ozone, and combined with the electrocatalysis of the cathode plate 7 and the anode plate 8, it can promote ozone to produce hydroxyl radicals ( · OH), improve treatment efficiency, while increasing ozone utilization and reducing ozone waste.

[0040] The cathode plate 7 and the anode plate 8 can be fixedly mounted on the mounting frame. In order to fully and effectively clean the cathode plate 7 and the anode plate 8 and prevent impurities such as iron mud from adhering to the surface of the cathode plate 7 and the anode plate 8, as shown in FIG. Figure 5 what Figure 6As shown, the present invention is provided with an annular lower support ring 29 and an upper support ring 30 on the inner wall of the electrocatalytic oxidation tank 1, the lower support ring 29 and the upper support ring 30 are annular, and the lower support ring 29 is fixed to the inner wall of the electrocatalytic oxidation tank 1. An electrode mounting frame is provided in the electrocatalytic oxidation tank 1, and the electrode mounting frame includes an annular bottom ring plate 31, and a lower positioning sleeve 32 is provided on the upper surface of the bottom ring plate 31, and the lower positioning sleeve 32 is coaxial with the electrocatalytic oxidation tank 1, and a plurality of first slots are provided on the inner wall of the lower positioning sleeve 32. A plurality of vertical connecting columns 33 are provided on the bottom ring plate 31, and an upper positioning sleeve 34 is fixedly provided on the top of the connecting column 33, and the inner diameter of the upper positioning sleeve 34 is the same as the inner diameter of the lower positioning sleeve 32, and the upper positioning sleeve 34 is coaxial with the lower positioning sleeve 32, and the inner wall of the upper positioning sleeve 34 is provided with a plurality of second slots, and the second slots correspond to the first slots one by one. The lower ends of the cathode plate 7 and the anode plate 8 are plugged into the first slot, and the upper ends of the cathode plate 7 and the anode plate 8 are plugged into the second slot. The upper support ring 30 is detachably mounted on the inner wall of the electrocatalytic oxidation tank 1, and the lower surface of the upper support ring 30 is provided with a first plane bearing, and the first plane bearing presses the upper positioning sleeve 34; the bottom ring plate 31 is mounted on the lower support ring 29 through the second plane bearing. Since the bottom and top of the electrode mounting frame are provided with plane bearings, the rotation resistance of the electrode mounting frame is small. When the sewage is sprayed out from the circulation pipe 10 and rotates and flows, the cathode plate 7 and the anode plate 8 can be pushed to rotate around the center line of the upper positioning sleeve 34 and the lower positioning sleeve 32, so that each cathode plate 7 and the anode plate 8 pass through the vicinity of the lower port of the circulation pipe 10 in turn, and the cleaning ball 13 sprayed out of the circulation pipe 10 can evenly clean each cathode plate 7 and the anode plate 8. The cathode plate 7 and the anode plate 8 can be connected to the DC power supply through a brush to ensure that the cathode plate 7 and the anode plate 8 can be stably energized when rotating.

[0041] In the present invention, the mud removal equipment 2 can be a sedimentation tank, such as Figure 7 As shown, solid particle impurities such as iron sludge in sewage are removed by static sedimentation. A sludge discharge mechanism 19 is provided at the bottom of the sedimentation tank. The sludge discharge mechanism 19 is used to discharge the iron sludge settled to the bottom of the sedimentation tank. A sludge pump can be used.

[0042] In addition, the mud removal equipment 2 can also adopt filtering equipment. There are many types of existing filtering equipment, but there are various problems. For example, the filter element is easy to be blocked, and the filter element needs to be replaced frequently, which is inconvenient to operate; the filtering area of ​​the filter element is small, which affects the filtering efficiency; at the same time, due to the small filtering area, after some filter holes are blocked, it is easy to cause the function of the entire filter element to be greatly affected, and the replacement frequency is high; sludge pumps and other equipment are usually used to discharge the filtered iron sludge, and the equipment cost and operating cost are high, and the discharged iron sludge needs to be dehydrated by dehydration equipment.

[0043] In order to solve these problems, the mud removal equipment 2 of the present invention is as follows Figure 8As shown, it includes a flexible filter cloth 27 and a vertically arranged filter cartridge 20, the filter cartridge 20 is a cylinder, the bottom of the filter cartridge 20 is sealed by a bottom plate, and the bottom plate can be welded to the lower end of the filter cartridge 20. A vertical first cylinder 23 and a second cylinder 24 are arranged in the filter cartridge 20, the first cylinder 23, the second cylinder 24 and the filter cartridge 20 are coaxial, the first cylinder 23 is located inside the second cylinder 24, and the lower end outer wall of the first cylinder 23 is connected to the lower end of the second cylinder 24 through a circular support plate 22. The upper end of the second cylinder 24 is connected to the upper end of the filter cartridge 20 through a circular top plate 25, the upper end of the first cylinder 23 is lower than the upper end of the second cylinder 24, and a detachable cover plate 26 is arranged at the upper end of the second cylinder 24, and the cover plate 26 can be connected to the second cylinder 24 or the top plate 25 through a set of screws. The water inlet chamber 28 is formed between the first cylinder 23 and the second cylinder 24. The cover plate 26 is provided with a water inlet hole 21 connected to the water inlet chamber 28. The water inlet hole 21 is connected to the water delivery pipe 15. The water delivery pipe 15 can be a hose. When the cover plate 26 is disassembled, the water delivery pipe 15 does not need to be removed from the cover plate 26. The inner cavity of the first cylinder 23 and the space between the second cylinder 24 and the filter cylinder 20 are the clean water chamber. The first cylinder 23, the second cylinder 24 and the support plate 22 are provided with through holes, and the through holes connect the clean water chamber and the water inlet chamber 28. The filter cloth 27 includes an outer filter cartridge, a bottom horizontal section, an inner filter cartridge and a top horizontal section which are integrally formed. The outer filter cartridge covers the inner wall of the second cylinder 24, the bottom horizontal section covers the support plate 22, the inner filter cartridge covers the outer wall of the first cylinder 23, the top horizontal section covers the upper port of the first cylinder 23, the upper edge of the outer filter cartridge is turned outward to cover the upper end surface of the second cylinder 24, and the upper end turn-up of the outer filter cartridge is pressed by the cover plate 26, and the lower surface of the cover plate 26 is provided with an elastic sealing pad, which can be a rubber pad, etc., to improve the sealing performance of the upper end turn-up of the outer filter cartridge. The filter cartridge 20 is provided with a clean water outlet for discharging the filtered clean water.

[0044] In the present invention, the sewage treated by the electrocatalytic oxidation tank 1 enters the water inlet cavity 28 through the water inlet hole 21, solid impurities such as iron mud in the sewage are intercepted by the filter cloth 27, and the clean water penetrates the filter cloth 27 and enters the clean water cavity, and then is discharged through the clean water outlet.

[0045] The filter cloth 27 of the present invention includes an outer filter cartridge, a bottom horizontal section, an inner filter cartridge and a top horizontal section which are integrally formed, and has a large overall filtering area, which can improve the filtering efficiency. In addition, due to the large filtering area, when certain parts of the filter cloth 27 are blocked, the area of ​​the unblocked part is also large enough, so that the entire filter cloth 27 can operate normally, thereby reducing the frequency of replacing the filter cloth 27. When the filter cloth 27 needs to be replaced, the cover plate 26 is opened, the entire filter cloth 27 can be taken out, and then the new filter cloth 2 is loaded into the filter cartridge 20, and then the cover plate 26 is re-covered. The filter cloth 27 itself can be used as a container for storing iron mud, and solid impurities such as iron mud stay inside the filter cloth 27. When the filter cloth 27 is replaced, the iron mud inside the filter cloth 27 can be taken out at the same time, without the need for other mud discharge equipment, simplifying the equipment structure. After the filter cloth 27 is taken out, the filter cloth 27 can be directly squeezed to dehydrate the iron mud to obtain dry iron mud, which is convenient for the later treatment of the iron mud.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A medical wastewater electrocatalytic treatment device, comprising an electrocatalytic oxidation tank (1) and a mud removal device (2); The bottom side wall of the electrocatalytic oxidation tank (1) is provided with a plurality of water inlet nozzles (3), the water outlet direction of the water inlet nozzles (3) is perpendicular to the radial direction of the electrocatalytic oxidation tank (1), the water inlet nozzles (3) are connected to a water inlet pipe (4), a booster pump (5) is provided on the water inlet pipe (4), and the water inlet pipe (4) between the booster pump (5) and the water inlet nozzles (3) is connected to an ozone supply mechanism (6); The electrocatalytic oxidation tank (1) is provided with a plurality of vertically arranged cathode plates (7) and anode plates (8), wherein the cathode plates (7) and anode plates (8) are arranged alternately, and a spacing is provided between the cathode plates (7) and anode plates (8); The upper side wall of the electrocatalytic oxidation tank (1) is provided with a water outlet (9), and the water outlet (9) is connected to the mud removal equipment (2); Features: The cathode plate (7) and the anode plate (8) are mesh plates.

2. The electrocatalytic treatment device for medical wastewater according to claim 1, characterized in that: The cathode plate (7) and the anode plate (8) are iron plates.

3. The electrocatalytic treatment device for medical wastewater according to claim 2, characterized in that: A circulation pipe (10) is arranged outside the electrocatalytic oxidation tank (1), the upper end of the circulation pipe (10) is connected to the electrocatalytic oxidation tank (1) above the cathode plate (7) and the anode plate (8), the lower end of the circulation pipe (10) is connected to the electrocatalytic oxidation tank (1) at the cathode plate (7) and the anode plate (8), and the water outlet direction of the lower end of the circulation pipe (10) is perpendicular to the radial direction of the electrocatalytic oxidation tank (1), and a circulation pump (11) is arranged on the circulation pipe (10).

4. The electrocatalytic treatment device for medical wastewater according to claim 3, characterized in that: A first interception net (12) is arranged below the cathode plate (7) and the anode plate (8); a plurality of cleaning balls (13) having a density less than that of water are arranged in the electrocatalytic oxidation tank (1) above the first interception net (12); a second interception net (14) is arranged at the upper end of the circulation pipe (10); the water outlet (9) is connected to a separation bin (16); the bottom of the separation bin (16) is connected to the mud removal equipment (2) through a water pipe (15); an arc-shaped third interception net (17) is arranged in the separation bin (16); one end of the third interception net (17) is connected to an inclined delivery pipe (18); the lower end of the delivery pipe (18) is connected to the circulation pipe (10).

5. The electrocatalytic treatment device for medical wastewater according to claim 4, characterized in that: The cleaning ball (13) comprises an elastic mesh shell (131), an iron silicate particle layer (132) and a hollow floating ball (133) which are arranged in sequence from the outside to the inside.

6. The electrocatalytic treatment device for medical wastewater according to claim 4, characterized in that: The inner wall of the electrocatalytic oxidation tank (1) is provided with a circular lower support ring (29) and an upper support ring (30), and the lower support ring (29) is fixed to the inner wall of the electrocatalytic oxidation tank (1); an electrode mounting frame is provided in the electrocatalytic oxidation tank (1), and the electrode mounting frame comprises a bottom ring plate (31), the upper surface of the bottom ring plate (31) is provided with a lower positioning sleeve (32), and the inner wall of the lower positioning sleeve (32) is provided with a plurality of first slots; the bottom ring plate (31) is provided with a plurality of vertical connecting columns (33), and the top of the connecting column (33) is provided with a plurality of first slots. An upper positioning sleeve (34) is fixedly arranged on the upper part, and a plurality of second slots are arranged on the inner wall of the upper positioning sleeve (34), the lower ends of the cathode plate (7) and the anode plate (8) are inserted into the first slots, and the upper ends of the cathode plate (7) and the anode plate (8) are inserted into the second slots; the upper support ring (30) is detachably mounted on the inner wall of the electrocatalytic oxidation tank (1), and a first plane bearing is arranged on the lower surface of the upper support ring (30), and the first plane bearing presses the upper positioning sleeve (34); the bottom ring plate (31) is mounted on the lower support ring (29) through the second plane bearing.

7. The electrocatalytic treatment device for medical wastewater according to claim 1, characterized in that: The mud removal equipment (2) is a sedimentation tank, and a mud discharge mechanism (19) is provided at the bottom of the sedimentation tank.

8. The electrocatalytic treatment device for medical wastewater according to claim 1, characterized in that: The desilting device (2) comprises a flexible filter cloth (27) and a vertically arranged filter cartridge (20), the bottom of the filter cartridge (20) being sealed by a bottom plate, a vertical first cylinder (23) and a second cylinder (24) being arranged inside the filter cartridge (20), the first cylinder (23) being located inside the second cylinder (24), and the lower end of the first cylinder (23) being connected to the lower end of the second cylinder (24) by a circular support plate (22), the upper end of the second cylinder (24) being connected to the upper end of the filter cartridge (20) by a circular top plate (25), the upper end of the first cylinder (23) being lower than the upper end of the second cylinder (24), the upper end of the second cylinder (24) being provided with a detachable cover plate (26), and a water inlet cavity being provided between the first cylinder (23) and the second cylinder (24). (28), the cover plate (26) is provided with a water inlet hole (21) connected to the water inlet chamber (28); the first cylinder (23), the second cylinder (24) and the support plate (22) are provided with through holes; the filter cloth (27) comprises an outer filter cartridge, a bottom horizontal section, an inner filter cartridge and a top horizontal section which are integrally formed, the outer filter cartridge covers the inner wall of the second cylinder (24), the bottom horizontal section covers the support plate (22), the inner filter cartridge covers the outer wall of the first cylinder (23), the top horizontal section covers the upper port of the first cylinder (23), the upper end edge of the outer filter cartridge is turned outward to cover the upper end surface of the second cylinder (24), and the upper end turn-over of the outer filter cartridge is pressed by the cover plate (26), and the lower surface of the cover plate (26) is provided with an elastic sealing gasket; the filter cartridge (20) is provided with a clean water outlet.

9. A method for electrocatalytic treatment of medical wastewater using the electrocatalytic treatment device for medical wastewater according to any one of claims 1 to 8, characterized in that: The medical sewage to be treated is introduced into a water inlet pipe (4), and ozone is introduced into the water inlet pipe (4) at the same time. The medical sewage is transported to the water inlet nozzle (3) by a pressure pump (5), so that the flow rate of the medical sewage when it is sprayed out from the water inlet nozzle (3) is greater than or equal to 10 m / s. The medical sewage spirally rises to the cathode plate (7) and the anode plate (8) in the electrocatalytic oxidation tank (1), and the medical sewage passes through the holes on the cathode plate (7) and the anode plate (8) and maintains a swirling flow. Under the electrocatalytic action of the cathode plate (7) and the anode plate (8), the ozone is decomposed to produce hydroxyl free radicals, and the hydroxyl free radicals decompose organic matter in the medical sewage.

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