A desulfurization wastewater solid-liquid separation pretreatment device

Abstract

This invention discloses a solid-liquid separation pretreatment device for desulfurization wastewater, specifically relating to the field of desulfurization wastewater treatment. It includes a wastewater treatment tank and an inlet pipe. The inlet pipe is connected to the top of the wastewater treatment tank. A solid discharge pipe is connected to one side of the wastewater treatment tank, and a liquid discharge pipe is connected to the bottom of the wastewater treatment tank. Inside the wastewater treatment tank, a transmission rotating column is connected via bearings. One end of the transmission rotating column is rotatably connected to a rotary motor. A rotating auger is fixedly connected to the outer wall of the transmission rotating column. A support member is fixedly connected to the inner wall of the inlet pipe, and a transmission rod is rotatably connected to the inner wall of the support member. This invention, by incorporating a movable component and a piston plate, allows the rotating fan blades to drive the transmission rod and rotate the rotating plate when the desulfurization wastewater enters the inlet pipe. This automatically adds flocculant during the treatment of desulfurization wastewater, solving the problem of solid-liquid separation failure caused by workers not having enough time to add flocculant during the treatment of large amounts of desulfurization wastewater.

Description

Technical Field

[0001] This invention relates to the field of desulfurization wastewater technology, and more specifically, to a desulfurization wastewater solid-liquid separation pretreatment device. Background Technology

[0002] Desulfurization wastewater originates from the wastewater generated during the limestone-gypsum wet desulfurization process of flue gas. Flue gas wet desulfurization is mainly concentrated in industries such as coal-fired power plants, petrochemical plants, steel plants, and cement kilns. Desulfurization wastewater is mainly formed by two parts: gypsum slurry wastewater and process cleaning wastewater. The chemical components of pollutants in desulfurization wastewater are supersaturated sulfites, sulfates, oils, organic matter (COD), fluorides, high concentrations of suspended solids, and heavy metal ions such as As, Hg, and Pb.

[0003] Traditional desulfurization wastewater solid-liquid separation requires manual addition of flocculants by staff. With large volumes of desulfurization wastewater, staff must continuously add flocculants to the solid-liquid separation device. If staff miss adding flocculants midway, the tiny particles in the wastewater cannot aggregate, and solid-liquid separation fails. Therefore, designing a desulfurization wastewater solid-liquid separation pretreatment device that eliminates the need for manual flocculant addition for large volumes of desulfurization wastewater has become a problem we need to solve. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a desulfurization wastewater solid-liquid separation pretreatment device. By incorporating a movable component and a piston plate, when the desulfurization wastewater is discharged into the inlet pipe, the rotating fan blades drive the transmission rod to rotate the rotating plate, ultimately enabling the automatic addition of flocculant during the treatment of desulfurization wastewater, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a desulfurization wastewater solid-liquid separation pretreatment device, comprising a wastewater treatment tank and an inlet pipe, wherein the inlet pipe is connected to the top of the wastewater treatment tank, a solid discharge pipe is connected to one side of the wastewater treatment tank, a liquid discharge pipe is connected to the bottom of the wastewater treatment tank, a transmission rotating column is connected to the inside of the wastewater treatment tank via bearings, a rotary motor is rotatably connected to one end of the transmission rotating column, a rotating auger is fixedly connected to the outer wall of the transmission rotating column, a support member is fixedly connected to the inner wall of the inlet pipe, a transmission rotating rod is rotatably connected to the inner wall of the support member, and a rotating fan blade is fixedly connected to the top of the transmission rotating rod. The rotating fan blades are arranged at an angle. A rotating plate is fixedly connected to the bottom of the transmission rod. A movable push column is fixedly connected to the bottom of the rotating plate. A movable part is sleeved on the outer wall of the movable push column. A limit baffle is fixedly connected to the bottom of the movable push column. A movable push column is fixedly connected to one side of the movable part. A piston plate is fixedly connected to one end of the movable push column. A liquid storage tank is slidably connected to the outer wall of the piston plate. The liquid storage tank is fixedly installed on the top of the wastewater treatment tank. An inlet pipe is connected to the top of the liquid storage tank. A drain pipe is connected to one side of the liquid storage tank. The drain pipe is connected to the top of the wastewater treatment tank. A one-way valve is provided on the outer wall of the drain pipe.

[0006] By adopting the above technical solution, the operator first turns on the rotary motor, which drives the transmission column to rotate. The transmission column then drives the rotary auger to rotate. At this point, the operator can pour the desulfurization wastewater into the wastewater treatment tank through the inlet pipe. The desulfurization wastewater is propelled by the rotary auger, and the liquid in the wastewater is discharged through the liquid discharge pipe, while the solids are propelled by the rotary auger and discharged through the solid discharge pipe, thus achieving solid-liquid separation. Simultaneously, when the desulfurization wastewater enters the inlet pipe, it impacts the rotating fan blades, causing them to rotate. The rotating fan blades then drive the transmission rod to rotate, which in turn drives the rotating plate to rotate. The rotating plate then drives the movable push column to rotate. The moving push column pushes the movable part, which in turn moves the moving push column, which in turn moves the piston plate. When the piston plate moves towards the drain pipe, it squeezes the flocculant in the storage tank into the drain pipe. When the piston plate moves towards the inlet pipe, it replenishes the storage tank with new flocculant through the inlet pipe. Because the drain pipe is equipped with a one-way valve, the flocculant in the drain pipe will not flow back into the storage tank. This allows the drain pipe to automatically discharge the flocculant into the wastewater treatment tank, causing the tiny particles in the desulfurization wastewater to agglomerate. This solves the problem of solid-liquid separation failure caused by workers not having time to add flocculant during the process of handling large amounts of desulfurization wastewater.

[0007] In a preferred embodiment, a sealing gasket is fixedly connected to one side of the water inlet pipe, and the movable push rod is slidably connected to the inner wall of the sealing gasket.

[0008] By adopting the above technical solution, the sealing gasket can prevent the desulfurization wastewater from being carried out of the inlet pipe during the back-and-forth movement of the movable push column, thus preventing the leakage of desulfurization wastewater.

[0009] In a preferred embodiment, a filter screen is fixedly connected to the top of the liquid discharge pipe, a cleaning rotating plate is slidably connected to the top of the filter screen, a threaded rotating rod is fixedly connected to the inner wall of the cleaning rotating plate, a support plate is rotatably connected to the bottom of the threaded rotating rod, and the support plate is fixedly connected to the inner wall of the liquid discharge pipe.

[0010] By adopting the above technical solution, the filter screen can prevent particulate matter in the wastewater treatment tank from being discharged through the liquid discharge pipe. However, particulate matter will accumulate on the filter screen, causing it to become clogged. At this time, the threaded rotating rod can be rotated, which will drive the cleaning rotating plate to rotate. The cleaning rotating plate will scrape off the solid particles on the filter screen, preventing the filter screen from becoming clogged and unable to discharge liquid.

[0011] In a preferred embodiment, the outer wall of the threaded rod is connected to a circular movable plate by a thread, and a limit plate is fixedly connected to the outer wall of the circular movable plate.

[0012] By adopting the above technical solution, when solid-liquid separation is performed on desulfurization wastewater, the liquid will be discharged through the liquid discharge pipe. The discharged liquid will squeeze the circular movable plate downwards, and the circular movable plate will rotate the threaded rod through the thread. The threaded rod will drive the cleaning plate to rotate, thereby automatically scraping off the solid particles on the filter screen during solid-liquid separation.

[0013] In a preferred embodiment, a limiting groove is formed on the inner wall of the liquid discharge pipe, and the limiting plate is slidably connected to the inner wall of the limiting groove.

[0014] By adopting the above technical solution, when the circular movable plate moves, it will drive the limiting plate to move as well. The limiting plate will then move within the limiting groove. The limiting plate, in conjunction with the limiting groove, will limit the circular movable plate, ensuring that the circular movable plate can only move vertically up and down and cannot rotate.

[0015] In a preferred embodiment, a support spring is fixedly connected to the top of the support plate, and the support spring is fixedly connected to the top of the circular movable plate.

[0016] By adopting the above technical solution, the support spring can reset the circular movable plate, thus enabling the device to be used multiple times and continuously clean the filter screen, improving its practicality.

[0017] In a preferred embodiment, a support frame is fixedly connected to the outer wall of the wastewater treatment tank, and the bottom of the support frame is provided with casters.

[0018] By adopting the above technical solution, workers can move the device using the support frame and casters, thereby improving the device's flexibility.

[0019] The technical effects and advantages of this invention are as follows:

[0020] 1. This invention incorporates a movable component and a piston plate. When desulfurization wastewater is discharged into the inlet pipe, the rotating fan blades drive the transmission rod to rotate the rotating plate. The rotating plate then drives the movable push column to move the movable component. The movable component, in turn, moves the piston plate via the movable push column. The piston plate then squeezes the flocculant in the storage tank and discharges it through the drain pipe. This allows for the automatic addition of flocculant during the treatment of desulfurization wastewater, solving the problem of solid-liquid separation failure caused by workers not having enough time to add flocculant during the treatment of large amounts of desulfurization wastewater.

[0021] 2. This invention incorporates a threaded rotating rod and a circular movable plate. When solid-liquid separation is performed on desulfurization wastewater, the liquid is discharged through the liquid discharge pipe. This discharged liquid compresses the circular movable plate, causing it to move downwards. The circular movable plate then rotates the threaded rotating rod via its threads, which in turn drives the cleaning rotating plate to rotate. This automatically scrapes off solid particles from the filter screen during solid-liquid separation, preventing the filter screen from becoming clogged and unable to discharge liquid. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a cross-sectional view of the liquid storage tank structure of the present invention.

[0024] Figure 3 For the present invention Figure 2 Enlarged view of the structure of part A.

[0025] Figure 4 For the present invention Figure 2 Enlarged view of the structure of part B.

[0026] Figure 5 For the present invention Figure 2 Enlarged view of the C-section structure.

[0027] Figure 6 This is a cross-sectional view of the water inlet pipe structure of the present invention.

[0028] Figure 7 For the present invention Figure 6 Enlarged view of the structure of part D.

[0029] The attached diagram is labeled as follows: 1. Wastewater treatment tank; 2. Inlet pipe; 3. Solid discharge pipe; 4. Liquid discharge pipe; 5. Transmission column; 6. Rotary motor; 7. Rotary auger; 8. Support component; 9. Transmission rod; 10. Rotary fan blade; 11. Rotating plate; 12. Movable push column; 13. Movable component; 14. Limiting baffle; 15. Movable push column; 16. Piston plate; 17. Liquid storage tank; 18. Inlet pipe; 19. Drain pipe; 20. One-way valve; 21. Sealing gasket; 22. Filter screen; 23. Cleaning rotating plate; 24. Threaded rotating rod; 25. Support plate; 26. Circular movable plate; 27. Limiting plate; 28. Limiting groove; 29. ​​Support spring; 30. Support frame; 31. Caster wheel. Detailed Implementation

[0030] 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.

[0031] Refer to the instruction manual appendix Figure 1-7 An embodiment of the present invention provides a desulfurization wastewater solid-liquid separation pretreatment device, comprising a wastewater treatment tank 1 and an inlet pipe 2. The inlet pipe 2 is connected to the top of the wastewater treatment tank 1. A solid discharge pipe 3 for discharging the solids after solid-liquid separation is connected to one side of the wastewater treatment tank 1. A liquid discharge pipe 4 for discharging the liquid after solid-liquid separation is connected to the bottom of the wastewater treatment tank 1. Inside the wastewater treatment tank 1, a transmission column 5 for driving a rotating auger 7 is connected via bearings. One end of the transmission column 5 is rotatably connected to a rotary motor 6 for driving the transmission column 5 to rotate. The rotary motor 6 is an AX4000T series direct drive rotary motor device. Figure 2As shown, a rotating auger 7 for pushing the desulfurization wastewater is fixedly connected to the outer wall of the transmission rotating column 5. A support member 8 for supporting the transmission rotating rod 9 is fixedly connected to the inner wall of the inlet pipe 2. A transmission rotating rod 9 for driving the rotating plate 11 to rotate is rotatably connected to the inner wall of the support member 8. A rotating fan blade 10 for driving the transmission rotating rod 9 to rotate is fixedly connected to the top of the transmission rotating rod 9. The rotating fan blade 10 is set at an inclination. The inclination of the rotating fan blade 10 makes it easier for the transmission rotating rod 9 to rotate due to the impact of the desulfurization wastewater. A movable push column 1 is fixedly connected to the bottom of the transmission rotating rod 9. 2. A rotating plate 11 that moves is fixedly connected to the bottom of the rotating plate 11. A movable push column 12 for pushing the movable component 13 to move is fixedly connected to the outer wall of the movable push column 12. A movable component 13 for driving the movable push column 15 to move is sleeved on the outer wall of the movable push column 12. A limiting baffle 14 for preventing the movable component 13 from falling off the movable push column 12 is fixedly connected to the bottom of the movable push column 12. A movable push column 15 for driving the piston plate 16 to move is fixedly connected to one side of the movable component 13. A piston plate 16 for squeezing the flocculant in the storage tank 17 is fixedly connected to one end of the movable push column 15. Figure 3 As shown, a storage tank 17 for storing flocculant is slidably connected to the outer wall of the piston plate 16. The storage tank 17 is fixedly installed on the top of the wastewater treatment tank 1. The top of the storage tank 17 is connected to an inlet pipe 18 for connecting to an external flocculant supply mechanism. A drain pipe 19 for discharging flocculant into the wastewater treatment tank 1 is connected to one side of the storage tank 17. The drain pipe 19 is connected to the top of the wastewater treatment tank 1. A one-way valve 20 is provided on the outer wall of the drain pipe 19 to prevent the flocculant in the drain pipe 19 from flowing back into the storage tank 17. A sealing gasket 21 is fixedly connected to one side of the inlet pipe 2 to prevent the desulfurization wastewater from being carried out during the movement of the movable push column 12. The movable push column 12 is slidably connected to the inner wall of the sealing gasket 21.

[0032] It should be noted that, in this process, the operator first turns on the rotary motor 6, which drives the transmission column 5 to rotate. The transmission column 5 then drives the rotary auger 7 to rotate. At this point, the operator can pour the desulfurization wastewater into the wastewater treatment tank 1 through the inlet pipe 2. The desulfurization wastewater is then propelled by the rotary auger 7, and the liquid in the wastewater is discharged through the liquid discharge pipe 4, while the solids are propelled by the rotary auger 7 and discharged through the solid discharge pipe 3, thus achieving solid-liquid separation. Simultaneously, when the desulfurization wastewater enters the inlet pipe 2, it impacts the rotary fan blade 10, causing it to rotate. The rotary fan blade 10 then drives the transmission rod 9 to rotate, which in turn drives the rotating plate 11 to rotate. The rotating plate 11 then drives the movable push column 12 to rotate, which in turn pushes the movable part 13, which in turn moves the movable push column 15. The movable push column 15 will drive the piston plate 16 to move. When the piston plate 16 moves towards the drain pipe 19, it will squeeze the flocculant in the storage tank 17 into the drain pipe 19. When the piston plate 16 moves towards the inlet pipe 2, it will replenish the storage tank 17 with new flocculant through the inlet pipe 18. Since the drain pipe 19 is equipped with a one-way valve 20, the flocculant in the drain pipe 19 will not flow back into the storage tank 17. This allows the drain pipe 19 to automatically discharge the flocculant into the wastewater treatment tank 1, causing the tiny particles in the desulfurization wastewater to agglomerate. This solves the problem of solid-liquid separation failure caused by workers not having time to add flocculant in the middle of a large amount of desulfurization wastewater. In addition, the sealing gasket 21 can prevent the movable push column 12 from carrying the desulfurization wastewater out of the inlet pipe 2 during the back-and-forth movement, preventing the desulfurization wastewater from leaking.

[0033] Furthermore, such as Figure 4 As shown, a filter screen 22 for preventing particulate matter from being discharged from the liquid discharge pipe 4 is fixedly connected to the top of the liquid discharge pipe 4. A cleaning rotating plate 23 for scraping off solid particles from the filter screen 22 is slidably connected to the top of the filter screen 22. A threaded rotating rod 24 for driving the cleaning rotating plate 23 to rotate is fixedly connected to the inner wall of the cleaning rotating plate 23. A support plate 25 for supporting the threaded rotating rod 24 is rotatably connected to the bottom of the threaded rotating rod 24. The support plate 25 is fixedly connected to the inner wall of the liquid discharge pipe 4. A circular movable plate 26 for rotating the threaded rotating rod 24 through threads after movement is connected to the outer wall of the threaded rotating rod 24. Figure 4As shown, a limiting plate 27 for moving within a limiting groove 28 is fixedly connected to the outer wall of the circular movable plate 26. A limiting groove 28 is provided on the inner wall of the liquid discharge pipe 4 for limiting the circular movable plate 26 in conjunction with the limiting plate 27. The limiting plate 27 is slidably connected to the inner wall of the limiting groove 28. A support spring 29 is fixedly connected to the top of the support plate 25 for resetting the circular movable plate 26 after it has moved. The support spring 29 is fixedly connected to the top of the circular movable plate 26.

[0034] It should be noted that during solid-liquid separation of desulfurization wastewater, the liquid is discharged through the liquid discharge pipe 4. This discharged liquid compresses the circular movable plate 26, causing it to move downwards. The circular movable plate 26 then rotates the threaded rod 24 via its threads. The threaded rod 24, in turn, drives the cleaning plate 23 to rotate. This automatically scrapes off the solid particles on the filter screen 22 during solid-liquid separation, preventing the filter screen 22 from becoming clogged and unable to discharge liquid. At the same time, the support spring 29 can reset the circular movable plate 26. This allows the device to be used multiple times, continuously cleaning the filter screen 22 and improving its practicality.

[0035] Furthermore, such as Figure 1 As shown, a support frame 30 for connecting the wastewater treatment tank 1 and the casters 31 is fixedly connected to the outer wall of the wastewater treatment tank 1. The bottom of the support frame 30 is provided with casters 31 for moving the device.

[0036] It should be noted that the device can be moved by the support frame 30 and the casters 31, thereby improving the device's flexibility.

[0037] Working principle: First, the operator turns on the rotary motor 6, which drives the transmission column 5 to rotate. The transmission column 5 then drives the rotary auger 7 to rotate. At this point, the operator can pour the desulfurization wastewater into the wastewater treatment tank 1 through the inlet pipe 2. The desulfurization wastewater is propelled by the rotary auger 7, and the liquid in the wastewater is discharged through the liquid discharge pipe 4, while the solids are propelled by the rotary auger 7 and discharged through the solid discharge pipe 3, thus achieving solid-liquid separation. Simultaneously, when the desulfurization wastewater enters the inlet pipe 2, it impacts the rotating fan blade 10, causing it to rotate. The rotating fan blade 10 then drives the transmission rod 9 to rotate, which in turn drives the rotating plate 11 to rotate. The rotating plate 11 then drives the movable push column 12 to rotate, which in turn pushes the movable part 13, which in turn moves the movable push column 15. The movable push column 15 then moves the piston plate 16. When the piston plate 16 moves towards the drain pipe 19, it pushes the contents of the storage tank 17... The flocculant is squeezed into the drain pipe 19. When the piston plate 16 moves towards the inlet pipe 2, the piston plate 16 will replenish the storage tank 17 with new flocculant through the inlet pipe 18. Since the drain pipe 19 is equipped with a one-way valve 20, the flocculant in the drain pipe 19 will not flow back into the storage tank 17. In this way, the drain pipe 19 can automatically discharge the flocculant into the wastewater treatment tank 1 to make the tiny particles in the desulfurization wastewater coagulate together. When the desulfurization wastewater is subjected to solid-liquid separation, the liquid will pass through the liquid discharge pipe 4. The discharged liquid will squeeze the circular movable plate 26 downwards, and the circular movable plate 26 will cause the threaded rod 24 to rotate through the thread. The threaded rod 24 will drive the cleaning plate 23 to rotate, so that the solid particles on the filter screen 22 can be automatically scraped off during solid-liquid separation, preventing the filter screen 22 from being blocked and unable to discharge liquid. At the same time, the support spring 29 can reset the circular movable plate 26, so that the device can be used multiple times and the filter screen 22 can be cleaned continuously.

[0038] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0039] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0040] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A desulfurization wastewater solid-liquid separation pretreatment device, comprising a wastewater treatment barrel (1) and a water inlet pipe (2), characterized in that: The inlet pipe (2) is connected to the top of the wastewater treatment tank (1). A solid discharge pipe (3) is connected to one side of the wastewater treatment tank (1). A liquid discharge pipe (4) is connected to the bottom of the wastewater treatment tank (1). A transmission rotating column (5) is connected to the inside of the wastewater treatment tank (1) via a bearing. A rotary motor (6) is rotatably connected to one end of the transmission rotating column (5). A rotary auger (7) is fixedly connected to the outer wall of the transmission rotating column (5). A support member (8) is fixedly connected to the inner wall of the inlet pipe (2). A transmission rotating rod (9) is rotatably connected to the inner wall of the support member (8). A rotating fan blade (10) is fixedly connected to the top of the transmission rotating rod (9). The rotating fan blade (10) is inclined. A rotating plate (11) is fixedly connected to the bottom of the transmission rotating rod (9). A movable push column (12) is fixedly connected to the bottom of the movable plate (11). A movable part (13) is sleeved on the outer wall of the movable push column (12). A limit baffle (14) is fixedly connected to the bottom of the movable push column (12). A movable push column (15) is fixedly connected to one side of the movable part (13). A piston plate (16) is fixedly connected to one end of the movable push column (15). A liquid storage tank (17) is slidably connected to the outer wall of the piston plate (16). The liquid storage tank (17) is fixedly installed on the top of the wastewater treatment tank (1). An inlet pipe (18) is connected to the top of the liquid storage tank (17). A drain pipe (19) is connected to one side of the liquid storage tank (17). The drain pipe (19) is connected to the top of the wastewater treatment tank (1). A one-way valve (20) is provided on the outer wall of the drain pipe (19).

2. The desulfurization wastewater solid-liquid separation pretreatment equipment according to claim 1, characterized in that: A sealing gasket (21) is fixedly connected to one side of the water inlet pipe (2), and the movable push column (12) is slidably connected to the inner wall of the sealing gasket (21).

3. The desulfurization wastewater solid-liquid separation pretreatment equipment according to claim 1, characterized in that: A filter screen (22) is fixedly connected to the top of the liquid discharge pipe (4). A cleaning rotating plate (23) is slidably connected to the top of the filter screen (22). A threaded rotating rod (24) is fixedly connected to the inner wall of the cleaning rotating plate (23). A support plate (25) is rotatably connected to the bottom of the threaded rotating rod (24). The support plate (25) is fixedly connected to the inner wall of the liquid discharge pipe (4).

4. The desulfurization wastewater solid-liquid separation pretreatment equipment according to claim 3, characterized in that: The outer wall of the threaded rotating rod (24) is connected to a circular movable plate (26) by a thread, and the outer wall of the circular movable plate (26) is fixedly connected to a limit plate (27).

5. The desulfurization wastewater solid-liquid separation pretreatment equipment according to claim 4, characterized in that: The inner wall of the liquid discharge pipe (4) is provided with a limiting groove (28), and the limiting plate (27) is slidably connected to the inner wall of the limiting groove (28).

6. The desulfurization wastewater solid-liquid separation pretreatment equipment according to claim 4, characterized in that: A support spring (29) is fixedly connected to the top of the support plate (25), and the support spring (29) is fixedly connected to the top of the circular movable plate (26).

7. The desulfurization wastewater solid-liquid separation pretreatment equipment according to claim 1, characterized in that: The outer wall of the wastewater treatment tank (1) is fixedly connected to a support frame (30), and the bottom of the support frame (30) is provided with casters (31).

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