A sewage treatment equipment for chlor-alkali chemical industry

Abstract

The utility model relates to chlor alkali chemical industry sewage treatment technical field, and disclose a kind of sewage treatment equipment for chlor alkali chemical industry, including sewage treatment cylinder, the top of sewage treatment cylinder is fixedly equipped with filter frame, the inner wall of filter frame is slidably connected with sliding frame, the inner wall of sliding frame is slidably connected with filter plate.Chlor alkali chemical industry sewage is supplied to the inner cavity of filter frame by inlet pipe, sliding frame and filter plate are slid in the inner wall of filter frame using chlor alkali chemical industry sewage, sliding frame is slid in the inner wall of cylinder using sliding block, so as to repel using adjacent two magnet plates, adjacent filter plate is moved using repulsion, filter plate is shaken using extension spring one and extension spring two auxiliary sliding block through sliding frame, filter plate side impurity is shaken, avoid impurity accumulation influence sewage stable supply, by disassembling filter frame and top cover, so as to move filter plate in the inner wall of sliding frame, and then filter plate is disassembled and maintained cleaning.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology in chlor-alkali chemical industry, specifically to a wastewater treatment device for chlor-alkali chemical industry. Background Technology

[0002] Chlor-alkali chemical wastewater is a general term for various types of wastewater generated during the chlor-alkali industrial production process. It is characterized by high salt content, high chloride content, and strong corrosiveness, and may also contain heavy metals and organic pollutants. If discharged directly without treatment, it will seriously pollute the environment. In order to assist in the stable treatment of chlor-alkali chemical wastewater, a wastewater treatment device for chlor-alkali chemical industry is needed.

[0003] Traditional wastewater treatment equipment used in chlor-alkali chemical industries typically filters chlor-alkali wastewater through filter plates inside a filter box before discharging it into a wastewater mixing drum. The wastewater and chemicals within the mixing drum are then mixed by a stirring frame, thus aiding in wastewater treatment. However, in traditional systems, impurities in the wastewater tend to accumulate on one side of the filter plates as it passes through the filter box, causing blockages and affecting the stable flow of wastewater within the filter box. Furthermore, traditional methods involve pouring chemicals into the mixing drum, making it difficult to ensure thorough mixing between the chemicals and wastewater, ultimately impacting the efficiency of chlor-alkali wastewater treatment. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a wastewater treatment device for chlor-alkali chemical industry to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a wastewater treatment device for chlor-alkali chemical industry, including a wastewater treatment cylinder, a filter frame fixedly mounted on the top of the wastewater treatment cylinder, a sliding frame slidably connected to the inner wall of the filter frame, a filter plate slidably connected to the inner wall of the sliding frame, a sliding plate fixedly mounted on the side of the sliding frame, and a sliding rod fixedly mounted on the side of the sliding plate, a fixing block fixedly mounted on the inner wall of the filter frame, a cylinder fixedly sleeved on the inner wall of the fixing block, and the inner wall of the cylinder slidably sleeved with the outer edge of the sliding rod, a top cover fixedly mounted on the top of the filter frame by screws, an inlet pipe fixedly sleeved on the inner wall of one side of the filter frame, a drain pipe fixedly mounted on the end of the filter frame away from the inlet pipe, and the inner wall of the drain pipe communicating with the inner wall of the top of the wastewater treatment cylinder, and a solenoid valve outlet pipe fixedly sleeved on the inner wall of the bottom of the wastewater treatment cylinder.

[0006] As a preferred embodiment of this utility model, a top plate is fixedly mounted on the top of the sewage treatment cylinder, a geared motor is fixedly mounted on the top of the top plate, a drive gear is fixedly sleeved on the output shaft of the geared motor through a coupling, a rotating gear is rotatably connected to the top of the sewage treatment cylinder, and the convex teeth of the rotating gear mesh with the convex teeth of the drive gear, a chemical-passing plate is fixedly sleeved on the inner wall of the top plate, a chemical-passing groove is formed on the inner wall of the chemical-passing plate, and a threaded rod is fixedly mounted on the bottom of the chemical-passing plate, and the bottom of the threaded rod is fixedly mounted to the bottom of the inner wall of the sewage treatment cylinder.

[0007] As a preferred embodiment of this utility model, a hollow stirring rod is fixedly mounted on the bottom of the rotating gear, and a solenoid valve drug supply pipe is fixedly mounted on the top of the top plate. The inner wall of the solenoid valve drug supply pipe is connected to the inner wall of the hollow stirring rod through the inner wall of the drug tank.

[0008] As a preferred embodiment of this utility model, the inner wall of the hollow stirring rod is fixedly fitted with a spiral blade, and the inner wall of the spiral blade is in close contact with the outer edge of the threaded rod. The outer edge of the hollow stirring rod is fixedly fitted with a stirring blade. An extrusion groove is opened on the outer edge of the hollow stirring rod near the stirring blade. The inner wall of the hollow stirring rod is connected to the inner cavity of the sewage treatment cylinder through the inner wall of the extrusion groove.

[0009] As a preferred embodiment of this utility model, the number of cylinders is four, the number of sliding plates is six, and the six sliding plates are staggered with the four fixed blocks. Two sliding rods are slidably sleeved on the inner walls of the four cylinders near both ends. Magnet plates are fixedly mounted on the adjacent sides of the two sliding rods, and the sides of the two adjacent magnet plates repel each other.

[0010] As a preferred embodiment of this utility model, a tension spring is fixedly connected to the side of the slide plate. The end of the tension spring away from the slide plate is fixedly connected to the side of the fixing block. A spring protective sleeve is movably sleeved on the outer edge of the tension spring. A tension spring is fixedly connected to the side of the slide plate away from the tension spring. The end of the tension spring away from the slide plate is fixedly connected to the side of the inner wall of the filter frame. A spring protective sleeve is fixedly connected to the side of the inner wall of the filter frame. The end of the spring protective sleeve away from the filter frame is fixedly connected to the side of the slide plate. The inner wall of the spring protective sleeve is movably sleeved with the outer edge of the tension spring.

[0011] As a preferred embodiment of this utility model, a sealing gasket 1 is fixedly installed on the inner wall of the top cover near the bottom, and a sealing gasket 2 is fixedly installed on the inner wall of the filter frame near the top, with the top of the sealing gasket 2 in close contact with the bottom of the sealing gasket 1.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This wastewater treatment equipment for chlor-alkali chemical industry utilizes a filter frame and filter plate. Wastewater from chlor-alkali chemical industry is supplied to the inner cavity of the filter frame through the inlet pipe. The wastewater then pushes the sliding frame and filter plate to slide within the inner wall of the filter frame. The sliding frame, via a sliding plate, drives the sliding rod to slide within the inner wall of the cylinder. Adjacent magnetic plates repel each other, assisting in moving adjacent filter plates. Tension springs one and two further assist the sliding plate in causing the filter plate to shake through the sliding frame, helping to shake off impurities on the side of the filter plate and preventing impurities from accumulating and affecting the stable supply of wastewater. By disassembling the filter frame and top cover, the filter plate can be moved within the inner wall of the sliding frame, thus assisting in the disassembly, maintenance, and cleaning of the filter plate.

[0013] 2. This wastewater treatment equipment for chlor-alkali chemical industry utilizes a geared motor and a drive gear. The geared motor drives the drive gear to rotate, which in turn drives a rotating gear. This rotating gear, in turn, drives a hollow stirring rod to rotate the stirring blades. The hollow stirring rod then drives a spiral blade to rotate along the outer edge of a threaded rod. The spiral blades and the threaded rod interact to push the agent supplied by the solenoid valve's agent supply pipe downwards, extruding the agent through the extrusion tank. The agent directly enters the root area of ​​the blades, where the blades experience the most intense agitation. In the high-speed flowing wastewater, the agent is instantly dispersed, and the small particles of agent diffuse with the water flow, quickly contacting and reacting with pollutants in the wastewater. Compared to static dosing, this significantly shortens the agent diffusion time and avoids incomplete reactions or secondary pollution caused by excessively high local agent concentrations. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the drainage pipe of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a side sectional view of the fixing block structure of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram at point B; Figure 6 This is a side sectional view of the drive gear structure of this utility model; Figure 7 This is a schematic diagram of the top cover structure of this utility model; Figure 8 This is a schematic diagram of the spiral blade structure of this utility model.

[0015] In the diagram: 1. Wastewater treatment cylinder; 2. Filter frame; 3. Sliding frame; 4. Filter plate; 5. Slide plate; 6. Slide rod; 7. Cylinder; 8. Magnetic plate; 9. Fixing block; 10. Tension spring one; 11. Spring protective sleeve one; 12. Tension spring two; 13. Spring protective sleeve two; 14. Inlet pipe; 15. Drain pipe; 16. Top cover; 17. Sealing gasket one; 18. Sealing gasket two; 19. Top plate; 20. Gear motor; 21. Solenoid valve chemical supply pipe; 22. Chemical passage plate; 23. Chemical passage tank; 24. Threaded rod; 25. Hollow stirring rod; 26. Spiral blade; 27. Extrusion groove; 28. Stirring blade; 29. ​​Drive gear; 30. Rotating gear; 31. Solenoid valve outlet pipe. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-8 A wastewater treatment device for chlor-alkali chemical industry includes a wastewater treatment cylinder 1. A filter frame 2 is fixedly mounted on the top of the wastewater treatment cylinder 1. A sliding frame 3 is slidably connected to the inner wall of the filter frame 2. A filter plate 4 is slidably connected to the inner wall of the sliding frame 3. A sliding plate 5 is fixedly mounted on the side of the sliding frame 3, and a sliding rod 6 is fixedly mounted on the side of the sliding plate 5. A fixing block 9 is fixedly mounted on the inner wall of the filter frame 2. A cylinder 7 is fixedly sleeved on the inner wall of the fixing block 9, and the inner wall of the cylinder 7 is slidably sleeved with the outer edge of the sliding rod 6. A top cover 16 is fixedly mounted on the top of the filter frame 2 by screws. An inlet pipe 14 is fixedly sleeved on the inner wall of one side of the filter frame 2. A drain pipe 1 is fixedly mounted on the end of the filter frame 2 away from the inlet pipe 14. 5. The inner wall of the drain pipe 15 is connected to the inner wall of the top of the sewage treatment cylinder 1. The inner wall of the bottom of the sewage treatment cylinder 1 is fixedly fitted with the solenoid valve outlet pipe 31. Through the cooperation of the sliding frame 3 and the filter plate 4, the filter plate 4 slides up and down in the inner wall of the sliding frame 3, thereby assisting the filter plate 4 in being erected. By sliding the sliding frame 3 left and right in the inner wall of the filter frame 2, the filter plate 4 can be adjusted left and right by the sliding frame 3. With the addition of the top cover 16, the filter frame 2 and the top cover 16 are connected by screws. At this time, the top of the inner wall of the top cover 16 is in close contact with the top of the filter plate 4 and the top of the sliding frame 3, thereby ensuring that the chlor-alkali chemical sewage is filtered through the inner wall of the filter plate 4.

[0018] In a preferred embodiment, a top plate 19 is fixedly mounted on the top of the sewage treatment cylinder 1, and a geared motor 20 is fixedly mounted on the top of the top plate 19. The output shaft of the geared motor 20 is fixedly sleeved with a drive gear 29 via a coupling. A rotating gear 30 is rotatably connected to the top of the sewage treatment cylinder 1, and the convex teeth of the rotating gear 30 mesh with the convex teeth of the drive gear 29. A medicine-passing plate 22 is fixedly sleeved on the inner wall of the top plate 19, and a medicine-passing groove 23 is formed on the inner wall of the medicine-passing plate 22. A threaded rod 24 is fixedly mounted on the bottom of the medicine-passing plate 22, and the bottom of the threaded rod 24... The part is fixedly assembled to the bottom of the inner wall of the sewage treatment cylinder 1. Through the cooperation of the reduction motor 20 and the drive gear 29, the reduction motor 20 drives the drive gear 29 to rotate, which in turn drives the rotating gear 30 to rotate, and the rotating gear 30 drives the hollow stirring rod 25 to rotate. Through the cooperation of the medicine tank 23 and the medicine plate 22, the medicine is supplied downward through the inner wall of the medicine tank 23 under the action of gravity. With the addition of the threaded rod 24, the threaded rod 24 is stably erected, which in turn assists the hollow stirring rod 25 and the threaded rod 24 to rotate relative to each other.

[0019] In a preferred embodiment, a hollow stirring rod 25 is fixedly mounted on the bottom of the rotating gear 30, and a solenoid valve drug supply pipe 21 is fixedly mounted on the top of the top plate 19. The inner wall of the solenoid valve drug supply pipe 21 is connected to the inner wall of the hollow stirring rod 25 through the inner wall of the drug tank 23. By installing the solenoid valve drug supply pipe 21, the drug is discharged through the drug tank 23 into the inner cavity of the hollow stirring rod 25.

[0020] In a preferred embodiment, a spiral blade 26 is fixedly sleeved on the inner wall of the hollow stirring rod 25, and the inner wall of the spiral blade 26 is in close contact with the outer edge of the threaded rod 24. A stirring blade 28 is fixedly mounted on the outer edge of the hollow stirring rod 25. An extrusion groove 27 is opened on the outer edge of the hollow stirring rod 25 near the stirring blade 28. The inner wall of the hollow stirring rod 25 is connected to the inner cavity of the sewage treatment cylinder 1 through the inner wall of the extrusion groove 27. Through the cooperation of the spiral blade 26 and the threaded rod 24, the hollow stirring rod 25 drives the spiral blade 26 to rotate on the outer edge of the threaded rod 24, thereby assisting the agent to be squeezed and discharged. The agent is discharged through the extrusion groove 27. When the pushed agent reaches the extrusion groove 27 of the hollow stirring rod 25, it is squeezed out from the extrusion groove 27 to the outside of the hollow stirring rod 25 under the action of pushing force and centrifugal force, and enters the sewage in the sewage treatment cylinder 1. With the addition of stirring blades 28, which are tilted at an angle of 30°-45°, the stirring blades 28 rotate with the hollow stirring rod 25, generating forces in two directions on the sewage in the sewage treatment cylinder 1: circumferential tangential force, which drives the sewage to move in a circular motion, forming a horizontal circulation; and axial thrust, which pushes the sewage upward or downward according to the tilt angle of the blades, forming a vertical convection. The superposition of these two flows creates a three-dimensional flow field of "up-down circulation + circumferential mixing" in the sewage treatment cylinder 1, eliminating local stagnant water areas. The extrusion tank 27 is located near the root of the stirring blades 28, where the blades are most disturbed. The agent released from the extrusion tank 27 directly enters the area of ​​most disturbed stirring of the stirring blades 28 and is instantly dispersed in the high-speed flowing sewage. The small particles of agent diffuse with the water flow, quickly contacting and reacting with the pollutants in the sewage.

[0021] In a preferred embodiment, there are four cylinders 7 and six sliding plates 5, with the six sliding plates 5 and four fixed blocks 9 arranged alternately. Two sliding rods 6 are slidably fitted onto the inner walls of the four cylinders 7 near both ends. Magnet plates 8 are fixedly mounted on the adjacent sides of the two sliding rods 6, and the sides of the two adjacent magnet plates 8 repel each other. Through the cooperation of the adjacent magnet plates 8, the two adjacent sliding plates 5 respectively drive the outer edge of one sliding rod 6 to slide in the inner wall of the same cylinder 7. Then, the two adjacent sliding rods 6 respectively drive one magnet plate 8 to move towards each other. Thus, through the repulsion between the two adjacent magnet plates 8, after the filter plate 4 near the water inlet pipe 14 is subjected to the force of the water flow, the filter plate 4 drives the remaining two filter plates 4 to shake, thereby further assisting in the filtration of sewage and preventing sewage impurities from clogging the inner wall of the filter plate 4 and affecting the stable discharge of sewage.

[0022] In a preferred embodiment, a tension spring 10 is fixedly connected to the side of the slide plate 5. The end of the tension spring 10 away from the slide plate 5 is fixedly connected to the side of the fixing block 9. A spring protective sleeve 11 is movably sleeved on the outer edge of the tension spring 10. A tension spring 2 12 is fixedly connected to the side of the slide plate 5 away from the tension spring 10, and the end of the tension spring 2 12 away from the slide plate 5 is fixedly connected to the side of the inner wall of the filter frame 2. A spring protective sleeve 2 13 is fixedly connected to the side of the inner wall of the filter frame 2, and the end of the spring protective sleeve 2 13 away from the filter frame 2 is fixedly connected to the side of the slide plate 5. The inner wall of the spring protective sleeve 2 13 is movably sleeved with the outer edge of the tension spring 2 12. Through the cooperation of the tension spring 10 and the tension spring 2 12, the side of the slide plate 5... The surface slides within the inner wall of the filter frame 2, and the sliding plate 5, in conjunction with the tension springs 10 and 12, further increases the shaking frequency, thereby further assisting in the filtration of sewage impurities. Through the combined use of the spring protective sleeves 11 and 13, which are made of fluoroplastics, the filter is further enhanced. Fluoroplastics are resistant to highly corrosive media such as high concentrations of chloride, hydrochloric acid, and sodium hydroxide in chlor-alkali sewage. They also have a wide temperature range and will not swell, crack, or age when immersed in sewage for a long time. The material is highly dense, which can completely prevent sewage from seeping in, and the surface is smooth and does not easily adhere to impurities, reducing contamination of the spring. The material is also moderately flexible and does not easily crack when the spring expands and contracts.

[0023] In a preferred embodiment, a sealing gasket 17 is fixedly mounted on the inner wall of the top cover 16 near the bottom, and a sealing gasket 28 is fixedly mounted on the inner wall of the filter frame 2 near the top. The top of the sealing gasket 28 is in close contact with the bottom of the sealing gasket 17. Through the cooperation of the sealing gasket 17 and the sealing gasket 28, the sealing gasket 17 and the sealing gasket 2 are in close contact, thereby sealing the top cover 16 and the filter frame 2 to prevent sewage leakage.

[0024] Working principle: When the device is in use, sewage is supplied to the inner cavity of the filter frame 2 through the inlet pipe 14. The sewage pushes the sliding frame 3 and filter plate 4 near the inlet pipe 14 to shake. The sliding frame 3, through the slide plate 5, drives the outer edge of the slide rod 6 to slide in the inner wall of the cylinder 7. Then, the magnet plates 8 on the adjacent sides of two adjacent slide rods 6 repel each other, thereby assisting the shaking of the three sliding frames 3 and filter plate 4. The tension springs 10 and 12 assist the slide plate 5 in cooperating with the sliding frame 3 to drive the filter plate 4 to shake further. After filtration, the sewage is supplied to the inner cavity of the sewage treatment cylinder 1 through the drain pipe 15, and the top cover 16 and filter frame 2 are separated by turning the screw in the opposite direction. This moves the filter plate 4 away from the sliding frame 3, thus assisting in the disassembly of the filter plate 4. The reduction motor 20 drives the drive gear 29 to rotate, which in turn drives the rotating gear 30 to rotate. The rotating gear 30 then drives the hollow stirring rod 25 and the stirring blade 28 to rotate. The hollow stirring rod 25 drives the spiral blade 26 to rotate on the outer edge of the threaded rod 24, thus assisting the agent to be discharged through the chemical tank 23 into the inner cavity of the sewage treatment cylinder 1 under the extrusion action between the spiral blade 26 and the threaded rod 24. This helps to fully mix the agent and sewage in the inner cavity of the sewage treatment cylinder 1, and the purified sewage is discharged to the outside with the assistance of the solenoid valve outlet pipe 31.

[0025] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device for chlor-alkali chemical industry, comprising a wastewater treatment tank (1), characterized in that: A filter frame (2) is fixedly mounted on the top of the sewage treatment cylinder (1). A sliding frame (3) is slidably connected to the inner wall of the filter frame (2). A filter plate (4) is slidably connected to the inner wall of the sliding frame (3). A sliding plate (5) is fixedly mounted on the side of the sliding frame (3), and a sliding rod (6) is fixedly mounted on the side of the sliding plate (5). A fixing block (9) is fixedly mounted on the inner wall of the filter frame (2). A cylinder (7) is fixedly sleeved on the inner wall of the fixing block (9), and the cylinder (7) The inner wall of the filter frame (2) is slidably sleeved with the outer edge of the slide rod (6). The top of the filter frame (2) is fixedly fitted with a top cover (16) by screws. The inner wall of one side of the filter frame (2) is fixedly sleeved with an inlet pipe (14). The end of the filter frame (2) away from the inlet pipe (14) is fixedly fitted with a drain pipe (15). The inner wall of the drain pipe (15) is connected to the inner wall of the top of the sewage treatment cylinder (1). The inner wall of the bottom of the sewage treatment cylinder (1) is fixedly sleeved with a solenoid valve outlet pipe (31).

2. The wastewater treatment equipment for chlor-alkali chemical industry according to claim 1, characterized in that: The top of the sewage treatment cylinder (1) is fixedly fitted with a top plate (19), and a geared motor (20) is fixedly fitted on the top of the top plate (19). The output shaft of the geared motor (20) is fixedly sleeved with a drive gear (29) through a coupling. A rotating gear (30) is rotatably connected to the top of the sewage treatment cylinder (1), and the convex teeth of the rotating gear (30) mesh with the convex teeth of the drive gear (29). A medicine-passing plate (22) is fixedly sleeved on the inner wall of the top plate (19). A medicine-passing groove (23) is opened on the inner wall of the medicine-passing plate (22). A threaded rod (24) is fixedly fitted on the bottom of the medicine-passing plate (22), and the bottom of the threaded rod (24) is fixedly fitted with the bottom of the inner wall of the sewage treatment cylinder (1).

3. The wastewater treatment equipment for chlor-alkali chemical industry according to claim 2, characterized in that: The bottom of the rotating gear (30) is fixedly equipped with a hollow stirring rod (25), and the top of the top plate (19) is fixedly equipped with a solenoid valve drug supply pipe (21). The inner wall of the solenoid valve drug supply pipe (21) is connected to the inner wall of the hollow stirring rod (25) through the inner wall of the drug tank (23).

4. A wastewater treatment device for chlor-alkali chemical industry according to claim 3, characterized in that: The inner wall of the hollow stirring rod (25) is fixedly fitted with a spiral blade (26), and the inner wall of the spiral blade (26) is in close contact with the outer edge of the threaded rod (24). The outer edge of the hollow stirring rod (25) is fixedly fitted with a stirring blade (28). The hollow stirring rod (25) has an extrusion groove (27) near the outer edge of the stirring blade (28). The inner wall of the hollow stirring rod (25) is connected to the inner cavity of the sewage treatment cylinder (1) through the inner wall of the extrusion groove (27).

5. A wastewater treatment device for chlor-alkali chemical industry according to claim 1, characterized in that: The number of cylinders (7) is four, the number of sliding plates (5) is six, and the six sliding plates (5) are staggered with the four fixed blocks (9). The inner walls of the four cylinders (7) near both ends are slidably fitted with two sliding rods (6). The adjacent sides of the two sliding rods (6) are fixedly fitted with magnet plates (8), and the sides between the two adjacent magnet plates (8) repel each other.

6. A wastewater treatment device for chlor-alkali chemical industry according to claim 1, characterized in that: A tension spring (10) is fixedly connected to the side of the slide plate (5). The end of the tension spring (10) away from the slide plate (5) is fixedly connected to the side of the fixing block (9). A spring protective sleeve (11) is movably sleeved on the outer edge of the tension spring (10). A tension spring (12) is fixedly connected to the side of the slide plate (5) away from the tension spring (10). The end of the tension spring (12) away from the slide plate (5) is fixedly connected to the side of the inner wall of the filter frame (2). A spring protective sleeve (13) is fixedly connected to the side of the inner wall of the filter frame (2). The end of the spring protective sleeve (13) away from the filter frame (2) is fixedly connected to the side of the slide plate (5). The inner wall of the spring protective sleeve (13) is movably sleeved on the outer edge of the tension spring (12).

7. A wastewater treatment device for chlor-alkali chemical industry according to claim 1, characterized in that: The top cover (16) is fixedly fitted with a sealing gasket one (17) near the bottom of the inner wall, and the filter frame (2) is fixedly fitted with a sealing gasket two (18) near the top of the inner wall, and the top of the sealing gasket two (18) is in close contact with the bottom of the sealing gasket one (17).

Images