A wastewater treatment device and treatment process

Abstract

This invention provides a wastewater treatment device and process, relating to the field of wastewater treatment technology. The wastewater treatment device includes an electrocatalytic reaction tank, with multiple support columns fixedly connected to the bottom of the electrocatalytic reaction tank and a sedimentation tank fixedly connected to the top of the electrocatalytic reaction tank. An electrocatalytic component is installed on the electrocatalytic reaction tank. A first connecting pipe is fixedly connected between the electrocatalytic reaction tank and the sedimentation tank, with a third solenoid valve installed at the end of the first connecting pipe furthest from the electrocatalytic reaction tank. An installation box is fixedly connected to one side of the electrocatalytic reaction tank. A cavitation component is located at the center of the installation box. Through the cavitation component and the filter press component, cavitation treatment of the settled sludge can be performed in the same device, decomposing the organic matter within it. Simultaneously, rapid filter press removal of water can be achieved, reducing the sludge moisture content and simplifying subsequent sludge treatment, resulting in excellent wastewater treatment performance.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment device and treatment process. Background Technology

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or for reuse. It is widely used in various fields such as chemical, pharmaceutical, medical, steel, agriculture, energy, urban landscaping, and catering, and is increasingly becoming part of everyday life for ordinary people. Classified by source, wastewater treatment is generally divided into industrial wastewater treatment and domestic wastewater treatment. Industrial wastewater includes industrial wastewater, agricultural wastewater, and medical wastewater, while domestic wastewater is wastewater generated in daily life, referring to a complex mixture of various forms of inorganic and organic matter. Medical wastewater generally contains more persistent organic matter and heavy metals, making it difficult to treat and posing certain health risks.

[0003] Current wastewater treatment equipment typically uses aerobic and anaerobic methods for treatment, but still requires sterilization. However, it is difficult to degrade drugs and their metabolites, and it is ineffective in removing heavy metals. At the same time, the discharged sludge contains a lot of organic matter and has a high water content, requiring post-treatment. The process is complex and the treatment effect is poor.

[0004] To address this, we have developed a new type of wastewater treatment equipment and process. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a wastewater treatment device and process, which solves the problems that current wastewater treatment devices generally use aerobic and anaerobic methods, but still require sterilization after treatment. However, these methods are ineffective in degrading drugs and their metabolites, and have no effect on removing heavy metals. In addition, the discharged sludge contains a lot of organic matter and has a high water content, requiring post-treatment, which is complicated and results in poor treatment effects.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment device, comprising an electrocatalytic reaction tank, wherein a plurality of support columns are fixedly connected to the bottom of the electrocatalytic reaction tank, a sedimentation tank is fixedly connected to the top of the electrocatalytic reaction tank, and an electrocatalytic component is provided on the electrocatalytic reaction tank;

[0009] A first connecting pipe is fixedly connected between the electrocatalytic reaction tank and the precipitation tank. A third solenoid valve is installed at the end of the first connecting pipe away from the electrocatalytic reaction tank. An installation box is fixedly connected to one side of the electrocatalytic reaction tank.

[0010] A cavitation component is provided at the center of the installation box, and a filter press component that cooperates with the cavitation component is provided at the center of the installation box. A limiting component corresponding to the filter press component is provided at the bottom of the installation box.

[0011] Preferably, the electrocatalytic component includes two sets of electrodes fixedly connected to the center of the electrocatalytic reaction tank. An electrolyte inlet is fixedly connected to the bottom of the front end face of the electrocatalytic reaction tank. A power supply is fixedly connected to the center of the front end face of the electrocatalytic reaction tank, and a switch is provided on the power supply. A precipitate discharge pipe is fixedly connected to the bottom of the electrocatalytic reaction tank, and a first solenoid valve is installed on the precipitate discharge pipe. An electrolytic wastewater discharge pipe is fixedly connected to the bottom of one side of the electrocatalytic reaction tank, and a second solenoid valve is installed on the electrolytic wastewater discharge pipe. Wastewater flows into the center of the electrocatalytic reaction tank through the first connecting pipe.

[0012] Using the above technical solution, electrolyte is added to the center of the electrolyte inlet, and the power is turned on by a switch to start the electrocatalytic oxidation reaction. Organic matter in the wastewater is oxidized and mineralized, heavy metals are reduced and adsorbed on the cathode, some impurities settle to the bottom, and gas is discharged through the electrolyte inlet. The second solenoid valve is opened, and the electrolyzed wastewater is discharged through the electrolyzed wastewater discharge pipe. Then the first solenoid valve is opened, and the precipitated impurities are discharged through the precipitate discharge pipe, thus completing the separation of impurities after electrolysis.

[0013] Preferably, the cavitation component includes pressure equalization chambers fixedly connected to the inner walls of the front and rear of the mounting box, a cavitation chamber fixedly connected to the top inner wall of the mounting box, a sludge discharge pipe connected between the sedimentation tank and the two pressure equalization chambers, a fourth solenoid valve installed at the end of each of the two sludge discharge pipes away from the pressure equalization chambers, a high-pressure pump fixedly connected to the bottom of each of the two pressure equalization chambers, and a precision nozzle located at the center of the cavitation chamber fixedly connected to the opposite surface of each of the two pressure equalization chambers.

[0014] With the above technical solution, by opening two fourth solenoid valves, the sludge in the center of the sedimentation tank enters the center of two pressure equalization chambers through two sludge discharge pipes. Then, two high-pressure pumps are started, and the sludge in the center of the two pressure equalization chambers is sprayed out through two precision nozzles. The rapid increase in flow velocity and the force of the reverse impact cause the water in the sludge to stretch and form bubbles. As the bubble size increases, the sludge surface will vibrate violently, thus forming a hydraulic cavitation phenomenon. The cells of organic matter rupture, and the organic matter is degraded.

[0015] Preferably, mounting holes are provided on the front and rear sides of the equalizing chamber and on the opposite sides of the two equalizing chambers, and the two precision nozzles pass through the center of the mounting holes.

[0016] The above technical solution enables the sludge to be ejected through two precision nozzles, thereby achieving rotational collision and obtaining a high flow rate.

[0017] Preferably, the filter press assembly includes a mounting plate fixedly connected between two equalizing chambers, a hydraulic cylinder fixedly connected to the bottom of the mounting plate, a pressure plate fixedly connected to the bottom of the piston rod of the hydraulic cylinder, a collection box provided at the bottom of the mounting box, a metal mesh fixedly connected to the center of the collection box, a drain pipe fixedly connected to the bottom of the collection box, a second connecting pipe fixedly connected to one side of the mounting box, and a fifth solenoid valve installed at the end of the second connecting pipe away from the collection box.

[0018] Using the above technical solution, the fifth solenoid valve is opened, and the sludge enters the center of the collection box through the second connecting pipe; the hydraulic cylinder is started, and the piston rod of the hydraulic cylinder drives the pressure plate to press down, thereby pressing out the water in the sludge through the metal mesh, and then discharging it through the drain pipe.

[0019] Preferably, the bottom of the mounting box has an insertion hole, the collection box passes through the center of the insertion hole, one end of the second connecting pipe is connected to the cavitation chamber, and the other end is connected to the collection box.

[0020] The above technical solution enables the collection box to be disassembled, facilitating the cleaning of the sludge inside. The cavitated sludge can enter the center of the collection box through the second connecting pipe for filtration.

[0021] Preferably, the limiting component includes mounting slots on both sides of the bottom of the mounting box, a guide post is fixedly connected to the center of each of the two mounting slots, two sliders are slidably connected to the center of each of the two mounting slots, a spring is fixedly connected between each set of sliders and the inner wall of the mounting slot, and a limiting plate is fixedly connected between each pair of horizontally corresponding sliders.

[0022] Using the above technical solution, pulling the two limiting plates causes the two sets of sliders to slide on the outer walls of the two guide columns, compressing the two sets of springs. The collection box is then removed, and the filtered sludge is processed. The collection box is then reinstalled, and the two limiting plates are released. Due to the rebound force of the two sets of springs, the two limiting plates reset, limiting the bottom of the collection box.

[0023] Preferably, both sets of sliders are provided with guide holes, and both guide posts pass through the center of the corresponding guide holes.

[0024] The above technical solution enables the two guide pillars to limit and guide the slider, allowing it to move stably.

[0025] A wastewater treatment process includes the following specific steps:

[0026] S1: First, add the wastewater to the center of the sedimentation tank, then add flocculant to the center of the sedimentation tank and wait for it to start settling. After settling, open the third solenoid valve and the wastewater flows into the center of the electrocatalytic reaction tank through the first connecting pipe.

[0027] S2: Add electrolyte to the center of the electrolyte inlet as needed, turn on the power supply by switching on the switch to start the electrocatalytic oxidation reaction. The organic matter in the wastewater is oxidized, decomposed and mineralized, the heavy metals are reduced and adsorbed on the cathode, some impurities settle to the bottom, and the gas is discharged through the electrolyte inlet. Open the second solenoid valve, and the wastewater after electrolysis is discharged through the wastewater discharge pipe. Then open the first solenoid valve, and the precipitated impurities are discharged through the precipitate discharge pipe, completing the separation of impurities after electrolysis.

[0028] S3: Open the two fourth solenoid valves. The sludge in the center of the sedimentation tank enters the center of the two pressure equalization chambers through the two sludge discharge pipes. Then, start the two high-pressure pumps. The sludge in the center of the two pressure equalization chambers is sprayed out through the two precision nozzles. The flow rate increases rapidly and the force of the reverse impact causes the water in the sludge to stretch and form bubbles. As the bubble size increases, the sludge surface will vibrate violently, thus forming a hydraulic cavitation phenomenon. The sludge cells rupture and the organic matter is degraded. Then, open the fifth solenoid valve and the sludge enters the center of the collection box through the second connecting pipe.

[0029] S4: Start the hydraulic cylinder. The piston rod of the hydraulic cylinder drives the pressure plate to press down, thereby pressing out the water in the sludge through the metal mesh and then draining it through the drain pipe.

[0030] S5: Pull the two limit plates to make the two sets of sliders slide on the outer wall of the two guide columns. The two sets of springs are compressed, the collection box is taken out, the sludge after filter pressing is processed, the collection box is then reinstalled, and the two limit plates are released. Due to the rebound force of the two sets of springs, the two limit plates are reset and the bottom of the collection box is limited, thus completing the sewage treatment.

[0031] (III) Beneficial Effects

[0032] This invention provides a wastewater treatment device and a treatment process. It has the following beneficial effects:

[0033] 1. This wastewater treatment equipment and process, through the installation of electrocatalytic components, enables oxidation-reduction reactions through electrolysis, thereby reducing and adsorbing heavy metals and degrading organic matter in wastewater, achieving good removal effect, and featuring a convenient process and easy operation.

[0034] 2. This wastewater treatment equipment and process, through the installation of cavitation components and filter press components, enables the cavitation treatment of settled sludge in the same equipment, decomposing the organic matter therein. At the same time, it can also quickly perform filter press to remove water, reducing the difficulty of subsequent sludge treatment and achieving good wastewater treatment effect. Attached Figure Description

[0035] Figure 1 This is an external view of the present invention;

[0036] Figure 2 This is a top view of the present invention;

[0037] Figure 3 This is a cross-sectional view of the mounting box of the present invention;

[0038] Figure 4 This is a bottom view of the present invention;

[0039] Figure 5 This is a top view of the electrocatalytic reaction cell of the present invention;

[0040] Figure 6 This is a schematic diagram of the installation box of the present invention.

[0041] The components include: 1. Electrocatalytic reaction tank; 2. Support column; 3. Sedimentation tank; 4. Electrocatalytic assembly; 401. Electrode; 402. Electrolyte inlet; 403. Power supply; 404. Switch; 405. Sediment discharge pipe; 406. First solenoid valve; 407. Wastewater discharge pipe after electrolysis; 408. Second solenoid valve; 5. First connecting pipe; 6. Third solenoid valve; 7. Mounting box; 8. Cavitation assembly; 801. Pressure equalization chamber; 802. Cavitation chamber; 803. 804. Sludge discharge pipe; 805. Fourth solenoid valve; 806. High-pressure pump; 807. Precision nozzle; 9. Filter press assembly; 908. Mounting plate; 909. Hydraulic cylinder; 9000. Pressure plate; 901. Collection box; 902. Metal mesh; 903. Drain pipe; 904. Second connecting pipe; 905. Fifth solenoid valve; 10. Limiting assembly; 1001. Mounting groove; 1002. Guide column; 1003. Slider; 1004. Spring; 1005. Limiting plate. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example:

[0044] like Figures 1-6 As shown, this embodiment of the invention provides a wastewater treatment device, including an electrocatalytic reaction tank 1. Multiple support columns 2 are fixedly connected to the bottom of the electrocatalytic reaction tank 1, and a sedimentation tank 3 is fixedly connected to the top of the electrocatalytic reaction tank 1. An electrocatalytic component 4 is installed on the electrocatalytic reaction tank 1. The electrocatalytic component 4 includes two sets of electrodes 401 fixedly connected to the center of the electrocatalytic reaction tank 1. An electrolyte inlet 402 is fixedly connected to the bottom of the front end face of the electrocatalytic reaction tank 1. A power supply 403 is fixedly connected to the center of the front end face of the electrocatalytic reaction tank 1, and a switch 404 is installed on the power supply 403. A sediment discharge pipe 405 is fixedly connected to the bottom of the electrocatalytic reaction tank 1, and a first solenoid valve 406 is installed on the sediment discharge pipe 405. A treated wastewater discharge pipe 407 is fixedly connected to the bottom of one side of the electrocatalytic reaction tank 1, and a treated wastewater discharge pipe 407 is installed on the treated wastewater discharge pipe 407. The system is equipped with a second solenoid valve 408. Wastewater flows into the center of the electrocatalytic reaction tank 1 through the first connecting pipe 5. Electrolyte is added to the center of the electrolyte inlet 402. The power supply 403 is started by the switch 404 to begin the electrocatalytic oxidation reaction. Organic matter in the wastewater is oxidized and mineralized, heavy metals are reduced and adsorbed onto the cathode, some impurities settle to the bottom, and gas is discharged through the electrolyte inlet 402. The second solenoid valve 408 is opened, and the electrocatalyzed wastewater is discharged through the wastewater discharge pipe 407. Then the first solenoid valve 406 is opened, and the precipitated impurities are discharged through the precipitate discharge pipe 405, completing the separation of impurities after electrocatalysis. The first connecting pipe 5 is fixedly connected between the electrocatalytic reaction tank 1 and the sedimentation tank 3. A third solenoid valve 6 is installed at the end of the first connecting pipe 5 away from the electrocatalytic reaction tank 1. An installation box 7 is fixedly connected to one side of the electrocatalytic reaction tank 1.

[0045] like Figure 3 and Figure 5As shown, a cavitation component 8 is centrally located in the mounting box 7. The cavitation component 8 includes equalizing chambers 801 fixedly connected to the front and rear inner walls of the mounting box 7, and a cavitation chamber 802 fixedly connected to the top inner wall of the mounting box 7. Sludge discharge pipes 803 are connected between the sedimentation tank 3 and each of the two equalizing chambers 801. A fourth solenoid valve 804 is installed at the end of each of the two sludge discharge pipes 803 furthest from the equalizing chamber 801. A high-pressure pump 805 is fixedly connected to the bottom of each of the two equalizing chambers 801. A precision nozzle 806 located at the center of the cavitation chamber 802 is fixedly connected to the opposite surface of each of the two equalizing chambers 801. Mounting holes are provided on the front and rear of the equalizing chambers 801 and on the opposite surfaces of the two equalizing chambers 801. Each precision nozzle 806 penetrates the center of the mounting hole, allowing sludge to be sprayed out through the two precision nozzles 806, thus achieving rotational collision and obtaining a high flow rate. After opening the two fourth solenoid valves 804, the sludge in the center of the sedimentation tank 3 enters the center of the two equalizing chambers 801 through the two sludge discharge pipes 803 respectively. Then, the two high-pressure pumps 805 are started, and the sludge in the center of the two equalizing chambers 801 is sprayed out through the two precision nozzles 806 in a rotating manner. The rapid increase in flow rate and the force of the reverse impact cause the water in the sludge to stretch and form bubbles. As the bubble size increases, the sludge surface will vibrate violently, thus forming a hydraulic cavitation phenomenon. The sludge cells rupture and the organic matter is degraded.

[0046] like Figure 3 , Figure 5 and Figure 6As shown, a filter press assembly 9, which cooperates with the cavitation assembly 8, is centrally located in the mounting box 7. The filter press assembly 9 includes a mounting plate 901 fixedly connected between two equalizing chambers 801. A hydraulic cylinder 902 is fixedly connected to the bottom of the mounting plate 901, and a pressure plate 903 is fixedly connected to the bottom of the piston rod of the hydraulic cylinder 902. A collection box 904 is located at the bottom of the mounting box 7, and an insertion hole is provided at the bottom of the mounting box 7. The collection box 904 passes through the center of the insertion hole. One end of the second connecting pipe 907 is connected to the cavitation chamber 802, and the other end is connected to the collection box 904. This allows the collection box 904 to be disassembled for easy cleaning of the sludge inside. The cavitated sludge can pass through... The sludge enters the center of the collection box 904 through the second connecting pipe 907, and then performs a filter press operation. A metal mesh 905 is fixedly connected to the center of the collection box 904, and a drain pipe 906 is fixedly connected to the bottom of the collection box 904. A second connecting pipe 907 is fixedly connected to one side of the mounting box 7, and a fifth solenoid valve 908 is installed at the end of the second connecting pipe 907 away from the collection box 904. When the fifth solenoid valve 908 is opened, the sludge enters the center of the collection box 904 through the second connecting pipe 907. The hydraulic cylinder 902 is activated, and the piston rod of the hydraulic cylinder 902 drives the pressure plate 903 to press down, thereby pressing the water in the sludge out through the metal mesh 905 and then discharging it through the drain pipe 906. The bottom of the mounting box 7 is provided with a limiting component 10 corresponding to the filter press assembly 9. The limiting component 10 includes mounting grooves 1001 on both sides of the bottom of the mounting box 7. A guide post 1002 is fixedly connected to the center of each mounting groove 1001. Two sliders 1003 are slidably connected to the center of each mounting groove 1001. Guide holes are provided on each set of sliders 1003, and the two guide posts 1002 pass through the center of the corresponding guide holes. This allows the two guide posts 1002 to limit and guide the sliders 1003, enabling them to move stably. The two sets of sliders 1003 are connected to the mounting box 7. Springs 1004 are fixedly connected between the inner walls of the trough 1001, and a limiting plate 1005 is fixedly connected between every two horizontally corresponding sliders 1003. Pulling the two limiting plates 1005 causes the two sets of sliders 1003 to slide on the outer walls of the two guide posts 1002, compressing the two sets of springs 1004. The collection box 904 is then removed, and the filtered sludge is processed. The collection box 904 is then reinstalled, and the two limiting plates 1005 are released. Due to the rebound force of the two sets of springs 1004, the two limiting plates 1005 reset, limiting the bottom of the collection box 904.

[0047] A wastewater treatment process includes the following specific steps:

[0048] S1: First, add the sewage into the center of sedimentation tank 3, then add flocculant into the center of sedimentation tank 3 and wait for it to start settling. After settling, open the third solenoid valve 6 and the sewage flows into the center of electrocatalytic reaction tank 1 through the first connecting pipe 5.

[0049] S2: Add electrolyte to the center of electrolyte inlet 402 as needed, start power supply 403 through switch 404 to start electrocatalytic oxidation reaction. Organic matter in wastewater is oxidized, decomposed and mineralized, heavy metals are reduced and adsorbed on the cathode, some impurities settle to the bottom, gas is discharged through electrolyte inlet 402, open the second solenoid valve 408, and the electrocatalyzed wastewater is discharged through electrolytic wastewater discharge pipe 407. Then open the first solenoid valve 406, and the precipitated impurities are discharged through precipitate discharge pipe 405, completing the separation of impurities after electrocatalysis.

[0050] S3: Open the two fourth solenoid valves 804. The sludge in the center of the sedimentation tank 3 enters the center of the two pressure equalization chambers 801 through the two sludge discharge pipes 803 respectively. Then, start the two high-pressure pumps 805. The sludge in the center of the two pressure equalization chambers 801 is sprayed out through the two precision nozzles 806. The high flow rate and the force of the reverse impact cause the water in the sludge to stretch and form bubbles. As the bubble size increases, the sludge surface will vibrate violently, thus forming a hydraulic cavitation phenomenon. The sludge cells rupture and the organic matter is degraded. Then, open the fifth solenoid valve 908. The sludge enters the center of the collection box 904 through the second connecting pipe 907.

[0051] S4: Start hydraulic cylinder 902. The piston rod of hydraulic cylinder 902 drives the pressure plate 903 to press down, thereby pressing the water in the sludge out through the metal mesh 905 and then draining it through the drain pipe 906.

[0052] S5: Pull the two limiting plates 1005 to make the two sets of sliders 1003 slide on the outer wall of the two guide columns 1002. The two sets of springs 1004 are compressed. Take out the collection box 904 and process the sludge after filter pressing. Then reinstall the collection box 904 and release the two limiting plates 1005. Due to the rebound force of the two sets of springs 1004, the two limiting plates 1005 reset and limit the bottom of the collection box 904, thus completing the sewage treatment.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device, comprising an electrocatalytic reaction tank (1), characterized in that: The bottom of the electrocatalytic reaction tank (1) Multiple support columns (2) are fixedly connected to the electrocatalytic reaction tank (1), a sedimentation tank (3) is fixedly connected to the top of the electrocatalytic reaction tank (1), and an electrocatalytic component (4) is provided on the electrocatalytic reaction tank (1). A first connecting pipe (5) is fixedly connected between the electrocatalytic reaction tank (1) and the sedimentation tank (3). A third solenoid valve (6) is installed at the end of the first connecting pipe (5) away from the electrocatalytic reaction tank (1). An installation box (7) is fixedly connected to one side of the electrocatalytic reaction tank (1). A cavitation component (8) is provided at the center of the installation box (7), a filter press component (9) that cooperates with the cavitation component (8) is provided at the center of the installation box (7), and a limiting component (10) corresponding to the filter press component (9) is provided at the bottom of the installation box (7). The electrocatalytic component (4) includes two sets of electrodes (401) fixedly connected to the center of the electrocatalytic reaction tank (1). An electrolyte inlet (402) is fixedly connected to the bottom of the front end face of the electrocatalytic reaction tank (1). A power supply (403) is fixedly connected to the center of the front end face of the electrocatalytic reaction tank (1). A switch (404) is provided on the power supply (403). A precipitate discharge pipe (405) is fixedly connected to the bottom of the electrocatalytic reaction tank (1). A first solenoid valve (406) is installed on the precipitate discharge pipe (405). An electrolytic wastewater discharge pipe (407) is fixedly connected to the bottom of one side of the electrocatalytic reaction tank (1). A second solenoid valve (408) is installed on the electrolytic wastewater discharge pipe (407). The cavitation component (8) includes a pressure equalization chamber (801) fixedly connected to the inner walls of the front and rear of the mounting box (7), a cavitation chamber (802) fixedly connected to the top inner wall of the mounting box (7), a sludge discharge pipe (803) connected between the sedimentation tank (3) and the two pressure equalization chambers (801), a fourth solenoid valve (804) installed at the end of each of the two sludge discharge pipes (803) away from the pressure equalization chamber (801), a high-pressure pump (805) fixedly connected to the bottom of each of the two pressure equalization chambers (801), and a precision nozzle (806) located at the center of the cavitation chamber (802) fixedly connected to the opposite surface of each of the two pressure equalization chambers (801). Mounting holes are provided on the front and rear sides of the equalizing chamber (801) and on the opposite sides of the two equalizing chambers (801), and the two precision nozzles (806) pass through the center of the mounting holes. The filter press assembly (9) includes a mounting plate (901) fixedly connected between two equalizing chambers (801). A hydraulic cylinder (902) is fixedly connected to the bottom of the mounting plate (901). A pressure plate (903) is fixedly connected to the bottom of the piston rod of the hydraulic cylinder (902). A collection box (904) is provided at the bottom of the mounting box (7). A metal mesh (905) is fixedly connected to the center of the collection box (904). A drain pipe (906) is fixedly connected to the bottom of the collection box (904). A second connecting pipe (907) is fixedly connected to one side of the mounting box (7). A fifth solenoid valve (908) is installed at the end of the second connecting pipe (907) away from the collection box (904).

2. The wastewater treatment equipment according to claim 1, characterized in that: The bottom of the mounting box (7) is provided with an insertion hole, and the collection box (904) passes through the center of the insertion hole. One end of the second connecting pipe (907) is connected to the cavitation chamber (802), and the other end is connected to the collection box (904).

3. The wastewater treatment equipment according to claim 2, characterized in that: The limiting component (10) includes mounting grooves (1001) on both sides of the bottom of the mounting box (7). A guide post (1002) is fixedly connected to the center of each of the two mounting grooves (1001). Two sliders (1003) are slidably connected to the center of each of the two mounting grooves (1001). A spring (1004) is fixedly connected between each set of sliders (1003) and the inner wall of the mounting groove (1001). A limiting plate (1005) is fixedly connected between each pair of horizontally corresponding sliders (1003).

4. The wastewater treatment equipment according to claim 3, characterized in that: Both sets of sliders (1003) are provided with guide holes, and both guide posts (1002) pass through the center of the corresponding guide holes.

5. The treatment process of a wastewater treatment device according to claim 4, characterized in that: The specific steps include the following: S1: First, add the sewage into the center of the sedimentation tank (3), then add flocculant into the center of the sedimentation tank (3), wait for it to start settling, and after settling, open the third solenoid valve (6), and the sewage flows into the center of the electrocatalytic reaction tank (1) through the first connecting pipe (5). S2: Add electrolyte to the center of the electrolyte inlet (402) as needed, start the power supply (403) through the switch (404) to start the electrocatalytic oxidation reaction. The organic matter in the sewage is oxidized, decomposed and mineralized, the heavy metals are reduced and adsorbed on the cathode, some impurities settle to the bottom, and the gas is discharged through the electrolyte inlet (402). Open the second solenoid valve (408) and the electrocatalyzed sewage is discharged through the electrolytic sewage discharge pipe (407). Then open the first solenoid valve (406) and the precipitated impurities are discharged through the precipitate discharge pipe (405) to complete the separation of impurities after electrocatalysis. S3: Open the two fourth solenoid valves (804), and the sludge in the center of the sedimentation tank (3) enters the center of the two equalizing chambers (801) through the two sludge discharge pipes (803). Then, start the two high-pressure pumps (805), and the sludge in the center of the two equalizing chambers (801) is sprayed out through the two precision nozzles (806). The high flow rate and the force of the reverse impact cause the water in the sludge to stretch and form bubbles. As the size of the bubbles increases, the surface of the sludge will vibrate violently, thus forming a hydraulic cavitation phenomenon. The cells of the sludge rupture and the organic matter is degraded. Then, open the fifth solenoid valve (908), and the sludge enters the center of the collection box (904) through the second connecting pipe (907). S4: Start the hydraulic cylinder (902). The piston rod of the hydraulic cylinder (902) drives the pressure plate (903) to press down, thereby pressing out the water in the sludge through the metal mesh (905) and then draining it through the drain pipe (906). S5: Pull the two limiting plates (1005) to make the two sets of sliders (1003) slide on the outer wall of the two guide columns (1002). The two sets of springs (1004) are compressed. Take out the collection box (904) and process the sludge after filter pressing. Then reinstall the collection box (904) and loosen the two limiting plates (1005). Due to the rebound force of the two sets of springs (1004), the two limiting plates (1005) reset and limit the bottom of the collection box (904) to complete the sewage treatment.

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