A sewage treatment device for preventing and treating water pollution in papermaking industry

Abstract

The application discloses a sewage treatment device for preventing and treating water pollution in a papermaking industry, relates to the technical field of preventing and treating water pollution in the papermaking industry, and aims to solve the problems of high energy consumption and the need for continuous human flocculant deployment when an aeration tank and a flotation scraper assembly are used for papermaking sewage treatment, and the problems of affecting the overall sewage treatment efficiency. The application is characterized in that a motor drives a work disc to rotate, a cam block is in contact with a piston column on a gas cavity, gas is continuously pressed into the bottom of a sewage treatment tank, and suspended impurities are taken to the liquid surface while the gas bubbles are formed and come out, the work disc rotation drives the rotation of a transition frame upper rotating arm II, thereby driving the sliding of the entire sliding block in the sewage liquid surface, and when the scraper installed on the sliding block moves in a cycle, the unilateral downward movement of the scraper scrapes the impurities, the unilateral upward movement of the scraper prevents the contact of the impurities with the liquid surface, the impurities on the liquid surface are continuously scraped to one side, the impurities on the sewage liquid surface are uniformly taken into a filter cavity, and the treatment of the suspended matter in the sewage is completed.

Description

A wastewater treatment device for water pollution control in the papermaking industry Technical Field

[0001] This invention relates to the field of water pollution control technology in the paper industry, specifically to a wastewater treatment device for water pollution control in the paper industry. Background Technology

[0002] Papermaking wastewater treatment refers to the methods for treating wastewater generated by the papermaking industry. Papermaking wastewater mainly comes from the pulping and papermaking processes in the papermaking industry.

[0003] Wastewater from pulping is the most polluting. Wastewater discharged during pulp washing is dark brown and is called black water. The concentration of pollutants in black water is very high, with BOD as high as 5-40 g / L. It contains a large amount of fiber, inorganic salts and pigments. Wastewater discharged from the bleaching process also contains a large amount of acid and alkali substances. Wastewater discharged from the paper machine is called white water, which contains a large amount of fiber and fillers and sizing agents added during the production process.

[0004] Wastewater treatment in the papermaking process includes flotation, which can recover fibrous solids from white water with a recovery rate of up to 95%, and the clarified water can be reused; combustion, which can recover sodium hydroxide, sodium sulfide, sodium sulfate, and other sodium salts combined with organic matter from black water; neutralization, which adjusts the pH of the wastewater; coagulation sedimentation or flotation, which can remove suspended solids from the wastewater; chemical precipitation, which can decolorize; biological treatment, which can remove BOD and is effective for kraft paper wastewater; and wet oxidation, which has been relatively successful in treating sulfite pulp wastewater. Treating papermaking wastewater is a comprehensive process involving multiple methods. In the process of adding multiple materials and flotation to remove impurities from the water, flocculant is added to the aeration tank. The rising water bubbles bring the impurities to the surface, and then the impurities on the surface are scraped off by a moving scraper. At the same time, the wastewater in the entire aeration tank is in a state of flushing and discharging equilibrium, so that the scraper can always contact the air bubbles on the surface of the liquid and complete the removal of flotation impurities. However, the entire aeration tank and the scraper installed on the top are not closely related and belong to independent control modules, which leads to an increase in the power consumption of the entire wastewater suspension treatment. In addition, the addition of flocculant relies too much on manual mixing and matching.

[0005] Therefore, we propose a wastewater treatment device for water pollution control in the papermaking industry. Summary of the Invention

[0006] The purpose of this invention is to provide a wastewater treatment device for water pollution prevention and control in the papermaking industry, so as to solve the problems mentioned in the background art, such as high energy consumption and the need for continuous manual flocculant preparation and addition, which affect the overall wastewater treatment efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment device for water pollution prevention and control in the papermaking industry, comprising a wastewater treatment tank, a protective cover and a transition frame, wherein the top of the wastewater treatment tank is fixed to the protective cover and the transition frame by spot welding, an I-shaped plate is movably connected inside the protective cover, and cam blocks are symmetrically fixed to both sides of the I-shaped plate by spot welding.

[0008] The wastewater treatment tank is equipped with a flocculant storage box fixed by bolts, and a mixing and discharging mechanism is installed on the flocculant storage box. The bottom of the flocculant storage box is evenly provided with discharge holes. The inner walls of both sides of the wastewater treatment tank are symmetrically fixed with air chambers by bolts. The bottom of the wastewater treatment tank is evenly provided with branch pipes. The bottom of the air chamber is connected to a one-way air outlet pipe, and one end of the one-way air outlet pipe is connected to each branch pipe.

[0009] The sewage treatment tank has sliders slidably connected to the inner walls on both sides, and scrapers slidably connected to the bottom of the sliders. The sewage treatment tank has a filter chamber inside, and a sieve plate is installed on the filter chamber.

[0010] Furthermore, a rotating arm is movably connected to the outer side of the cam block on the I-shaped plate, and a rotating arm is rotatably connected to the bottom inner wall of the transition frame via a bearing. One end of the rotating arm is movably connected to the outer side of the rotating arm, and a U-shaped clamp fixed at the end of the rotating arm engages with a protrusion on one side of the slider.

[0011] Furthermore, limit blocks are symmetrically fixed to the inner walls of both sides of the sewage treatment tank and to both sides of the slider by bolts. Springs are uniformly and symmetrically installed on the inner wall of the slider, and one end of the springs is connected to the scraper. Limit posts are symmetrically fixed to both sides of the scraper by spot welding, and one side of the limit post abuts against the limit block.

[0012] Furthermore, the mixing and discharging mechanism includes a rotating shaft, an extended arm, and a sealing sleeve. The rotating shaft is movably connected to the bottom inner wall of the wastewater treatment tank via a bearing. One end of the rotating shaft passes through the flocculant storage box and is fixedly connected to a gear. The rotating shaft is slidably connected to the sealing sleeve inside the flocculant storage box. One side of the sealing sleeve passes through the bottom of the flocculant storage box and is symmetrically rotatably connected to a connecting rod. The extended arm is symmetrically movably connected to the outer wall of the rotating shaft. One end of the extended arm is fixed with a counterweight ball by spot welding, and the other end of the extended arm is movably connected to the connecting rod.

[0013] Furthermore, a motor is fixed to the inner wall of the protective cover by bolts, and a fixed gear on the output end of the motor meshes with a fixed gear sleeved on the I-shaped plate, and the fixed gear sleeved on the I-shaped plate meshes with a gear at the end of the rotating shaft.

[0014] Furthermore, a piston rod is slidably connected inside the air chamber. One end of the piston rod penetrates the inner wall of the sewage treatment tank and abuts against the cam block. A spring is sleeved on the piston rod above the sewage treatment tank. A one-way air inlet pipe is connected to one side of the air chamber.

[0015] The wastewater treatment method used for water pollution control in the papermaking industry is as follows:

[0016] Based on traditional flotation decontamination, quantitative reagent addition is achieved. Wastewater is discharged into the wastewater treatment tank through the inlet pipe on one side. At the same time, flocculant is dissolved in an equal proportion according to the amount of wastewater entering the wastewater treatment tank and added to the flocculant storage box. The motor located inside the protective cover is started. The motor rotates and drives the rotating shaft to rotate. The arm on the rotating shaft rotates to accelerate the combination of flocculant and wastewater.

[0017] The cam block on the I-shaped plate rotates and continuously presses the piston rod located on the sewage treatment tank. The piston rod presses down and squeezes the air in the air chamber into the one-way air outlet pipe, which then emerges from the bottom of the sewage treatment tank through the branch pipe, bringing suspended impurities to the water surface.

[0018] The rotation of the I-shaped disc drives the movement of the first rotating arm on both sides of the cam block, which in turn pulls the slider connected to the second rotating arm to move left and right on the inner wall of the sewage treatment tank. When the scraper on the slider moves to one side, the limiting post abuts against the upper limit block on the inner wall of the sewage treatment tank, causing the scraper at the end of the slider to move downward, pushing the impurities on the water surface to one side. Then the limiting post separates from the limiting block, and the slider moves in the opposite direction, causing the scraper to leave the water surface. The scraper moves repeatedly, continuously pushing the suspended impurities to one side of the filter chamber. After being intercepted by the screen plate, the suspended solids accumulate at the bottom of the filter chamber, and the sewage after a single treatment is discharged from the sewage treatment tank.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, the motor drives the I-shaped disk to rotate, and the cam block contacts the piston column on the air chamber, continuously pressing the gas into the bottom of the sewage treatment tank. As the gas forms bubbles and rises, it carries suspended impurities to the liquid surface. The rotation of the I-shaped disk drives the rotating arm on the transition frame to rotate, thereby driving the entire slider to slide on the sewage surface. When the scraper installed on the slider moves in a cycle, it moves down on one side to scrape impurities and moves up on one side to prevent contact with impurities on the liquid surface, thereby continuously scraping the impurities on the liquid surface to one side, so that the impurities on the sewage surface enter the filtration chamber in a unified manner, completing the treatment of suspended solids in the sewage. Compared with the independent operation of the scraper installed on the toothed chain and the Roots blower, the overall power consumption of the papermaking sewage treatment equipment increases and the sewage treatment cost increases.

[0021] 2. In this invention, the rotation angle of the extended arm on the rotating shaft is controlled by controlling the motor speed. After the extended arm is extended, the connecting rod pulls the sealing sleeve column downward. After the bottom of the sealing sleeve column contacts the discharge hole at the bottom of the flocculant storage box, the discharge hole is sealed. When the rotation speed of the rotating shaft decreases, the counterweight ball changes the angle of the extended arm, thereby causing the discharge hole to open and the flocculant to be discharged. The motor speed is controlled according to the flocculant discharge rate per unit time of the discharge hole of the flocculant storage box to achieve quantitative discharge of flocculant. No manual feeding is required, and the overall efficiency of papermaking wastewater treatment is higher. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the overall structure of the wastewater treatment device for water pollution prevention and control in the papermaking industry according to the present invention;

[0023] Figure 2 is a schematic front cross-sectional view of the wastewater treatment device for water pollution prevention and control in the papermaking industry according to the present invention.

[0024] Figure 3 is a schematic diagram of the connection structure between the gear on the I-shaped disk and the gear at the end of the motor according to the present invention;

[0025] Figure 4 is a schematic diagram of the connection structure between the mixing and storage mechanism and the flocculant storage box of the present invention;

[0026] Figure 5 is a schematic diagram of the piston rod installed in the air cavity of the present invention;

[0027] Figure 6 is a schematic cross-sectional view of the connection between the scraper and the slider of the present invention.

[0028] In the diagram: 1. Wastewater treatment tank; 2. Protective cover; 3. I-shaped disc; 4. Cam block; 5. Rotary arm one; 6. Motor; 7. Mixing and discharging mechanism; 701. Rotating shaft; 702. Extending arm; 703. Counterweight ball; 704. Sealing sleeve column; 705. Connecting rod; 8. Flocculant storage box; 9. Discharge hole; 10. Air chamber; 11. Piston rod; 12. Spring one; 13. One-way air inlet pipe; 14. One-way air outlet pipe; 15. Branch pipe; 16. Transition frame; 17. Rotary arm two; 18. Slider; 19. Scraper; 20. Spring two; 21. Limiting column; 22. Limiting block; 23. Filter chamber; 24. Screen plate. Detailed Implementation

[0029] 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.

[0030] Please refer to Figures 1-6. This invention provides a technical solution:

[0031] The present invention performs simultaneous venting, chemical dosing and debris scraping in the original sewage treatment tank 1, and achieves synchronous control by adjusting the speed of a single motor 6. Compared with the aeration tank, which uses equipment with less correlation for sewage treatment, the energy consumption increases and the treatment efficiency decreases.

[0032] Since papermaking wastewater treatment involves multiple steps and the wastewater treatment process is relatively complex, in order to simplify the process, as shown in Figure 2, the wastewater that needs to be suspended is discharged into the wastewater treatment tank 1. The entire wastewater treatment tank 1 is divided into two chambers, one of which is connected in a U-shape. A protective cover 2 is installed on the top of the wastewater treatment tank 1. The power equipment is installed inside the protective cover 2, as shown in Figure 3. The output end of the motor 6 is fixed with a gear, and the inside of the protective cover 2 is movably connected to the I-shaped disk 3. The two disks of the I-shaped disk 3 are the same size and are both equipped with cam blocks 4. The motor 6 drives the entire I-shaped disk 3 to rotate through the meshing of the gears.

[0033] The two sides of the I-shaped wheel are symmetrically connected to the rotating arm 5, and the bottom of the transition frame 16 is rotatably connected to the rotating arm 17. The end of the rotating arm 5 is movably connected to the rotating arm 17, so that after the I-shaped disc 3 rotates, the rotating arm 15 drives the rotating arm 17 to swing left and right at the bottom of the transition frame 16. As shown in Figure 1, the two sides of the inner wall of the sewage treatment tank 1 are slidably connected to the slider 18, and the U-shaped head at the end of the rotating arm 17 is engaged with the protrusion on the slider 18. When the rotating arm 17 swings left and right, it drives the slider 18 to slide left and right on the inner wall of the sewage treatment tank 1.

[0034] A scraper 19 is slidably connected to the upper part of the slider 18. This scraper is used to scrape away impurities and air bubbles floating on the water surface, as shown in Figure 6. Springs 20 are evenly fixed to the top of the scraper 19. Springs 20 are connected to the inner wall of the top of the slider 18. Limiting posts 21 are symmetrically fixed on both sides of the scraper 19. Referring to Figure 2, limiting blocks 22 are symmetrically fixed on the inner walls of both sides of the sewage treatment tank 1. The cross-section of the limiting block 22 is a parallelogram. In the initial state, the scraper 19 is in its own... Under the action of gravity, the second spring 20 inside the slider 18 is pulled, so that the limiting posts 21 on both sides of the scraper 19 are at the middle height of the limiting block 22. At this time, the cam block 4 rotates to the right, and the first rotating arm 5 pushes the second rotating arm 17 to drive the slider 18 to start sliding to the right. During the movement of the upper limiting post 21 to the right, the scraper 19 contacts the tangent of the limiting block 22, causing the scraper 19 to move downward relative to the slider 18 as a whole, and pulling the second spring 20 to extend. At this time, the bottom of the scraper 19 contacts the water surface, causing the impurities on the water surface to move to the right.

[0035] When the limiting post 21 moves away from the limiting block 22, the second spring 20 pulls the scraper 19 upward, causing the limiting post 21 to come to the right side of the limiting block 22. After the second rotating arm 17 swings to the left, the entire slider 18 begins to move to the left. At the same time, after being limited by the cutting surface of the limiting block 22, the scraper 19 connected to the limiting post 21 moves upward and leaves the water surface. The repeated left and right swinging of the second rotating arm 17 causes the scraper 19 at the bottom of the slider 18 to continuously push the floating impurities and bubbles on the water surface to the right. Finally, the floating impurities fall into the filter chamber 23. After being intercepted and filtered by the sieve plate 24, the impurities are finally extracted from the bottom of the filter chamber 23.

[0036] The above-mentioned suspended impurities on the surface of sewage require the addition of flocculants to the sewage in advance, as well as the addition of rising air bubbles in the water. For this purpose, air chambers 10 are symmetrically installed on the inner wall of the entire sewage treatment tank 1. A piston rod 11 is slidably connected in the air chamber 10. The top of the piston rod 11 abuts against the bottom of the cam block 4 on the I-shaped plate 3. After the cam block 4 contacts the piston rod 11 on the protruding side, it presses down the piston rod 11, causing the piston rod 11 to squeeze the air in the air chamber 10 into the one-way air outlet pipe 14 connected at the bottom. The one-way air outlet pipe 14 is connected to the branch pipe 15 at the bottom of the sewage treatment tank 1. The air entering the branch pipe 15 will float out from the bottom of the sewage treatment tank 1 in the form of air bubbles, and bring the suspended impurities in the sewage to the surface, thus accelerating the removal efficiency of impurities in the sewage.

[0037] The other side of the air chamber 10 is connected to a one-way air inlet pipe 13, which is combined with a one-way air outlet pipe 14. That is, a one-way valve is installed on the pipe. During the air extraction process on the piston rod 11 plate, sewage is prevented from being drawn into the air chamber 10. At this time, the one-way air outlet pipe 14 is in a closed state, and the external gas enters the air chamber 10 through the one-way air inlet pipe 13. The upward contact of the piston rod 11 with the cam block 4 depends on the sleeved spring 12, as shown in Figure 5.

[0038] Typically, aeration tanks are connected to sedimentation tanks. Wastewater treated by aeration tanks still needs to be settled. After a single batch of wastewater is treated in wastewater treatment tank 1, flocculant needs to be added again. Manual measurement, mixing and adding are complicated operations. Therefore, flocculant storage boxes 8 are installed in the entire wastewater treatment tank 1. By storing flocculant in advance, it can be actively released when it needs to be added, improving the convenience of wastewater treatment.

[0039] As shown in Figure 4, a mixing and discharging mechanism 7 is installed inside the flocculant storage box 8. The main rotating shaft 701 passes through the flocculant storage box 8. At the same time, one end of the rotating shaft 701 is movably connected to the bottom of the sewage treatment tank 1. A gear is installed at the end of the rotating shaft 701 and meshes with the gear on the I-shaped plate 3. It is also driven by the motor 6.

[0040] After the I-shaped disk 3 rotates, the rotating shaft 701 starts to rotate. The extension arm 702 located on the rotating shaft 701 unfolds under the action of centrifugal force. The outer wall of the extension arm 702 has an arc surface. During the rotation, it will accelerate the mixing of flocculant and sewage, and at the same time drive the water flow downward. A counterweight ball 703 is fixed at one end of the extension arm 702. After unfolding, the extension arm 702 pulls the sealing sleeve 704 located on the rotating shaft 701 through the connecting rod 705. One side of the sealing sleeve 704 is located inside the flocculant storage box 8, and a rubber pad is attached to the bottom. When the sealing sleeve 704 moves downward, it contacts the discharge hole 9 located at the bottom of the flocculant storage box 8, and completes the sealing of the discharge hole 9. At this time, the flocculant cannot flow out.

[0041] That is, when the extension arm 702 rotates and unfolds, the entire flocculant storage box 8 is in a closed state to prevent excessive flocculant from entering the sewage. When flocculant needs to be added to the sewage, the rotation angle of the entire extension arm 702 is controlled by adjusting the speed of the motor 6. When the speed of the motor 6 is less than the preset value, the extension arm 702 is affected by the gravity of the counterweight ball 703, which drives the entire sealing sleeve column 704 to move upward. After the discharge hole 9 on the flocculant storage box 8 is released from the pressure of the sealing sleeve column 704, the flocculant will enter the sewage treatment tank 1 through the discharge hole 9. Then, according to the amount of flocculant discharged by the flocculant storage box 8 per unit time, the speed of the entire motor 6 is increased, thereby realizing the re-sealing of the discharge hole 9 by the entire sealing sleeve column 704, completing the quantitative feeding of flocculant.

[0042] Working principle of this invention:

[0043] After the flocculant is properly prepared, it is poured into the flocculant storage box 8. The flocculant enters the sewage treatment tank 1 through the discharge hole 9 and mixes with the sewage in the tank. The motor 6 located inside the protective cover 2 is started. The rotation of the motor 6 drives the rotating shaft 701 to rotate. The extended arm 702 located on the rotating shaft 701 rotates, accelerating the combination of flocculant and sewage.

[0044] The cam block 4 on the I-shaped disk 3 rotates and continuously presses the piston rod 11 located on the sewage treatment tank 1. The piston rod 11 presses down to squeeze the air in the air chamber 10 into the one-way air outlet pipe 14. At the same time, it continuously draws air into the air chamber 10 through the one-way air inlet pipe. As the branch pipe 15 emerges from the bottom of the sewage treatment tank 1, it carries the suspended impurities to the water surface.

[0045] The rotation of the I-shaped disk 3 drives the movement of the rotating arm 5 on the two side cam blocks 4, which pulls the slider 18 connected to the rotating arm 17 to move left and right on the inner wall of the sewage treatment tank 1. When the scraper 19 on the slider 18 moves to one side, the limiting post 21 abuts against the upper limit block 22 on the inner wall of the sewage treatment tank 1, causing the scraper 19 at the end of the slider 18 to move downward, pushing the impurities on the water surface to one side. Then the limiting post 21 separates from the limiting block 22, and the slider 18 moves in the opposite direction, causing the scraper 19 to separate from the water surface. The scraper 19 moves repeatedly, continuously pushing the suspended impurities to one side of the filter chamber 23. After being intercepted by the screen plate 24, the suspended matter finally accumulates at the bottom of the filter chamber 23. The sewage after a single treatment is discharged from the sewage treatment tank 1, and then the treated sewage in the sewage treatment tank 1 is discharged into the sedimentation tank for settling.

[0046] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A wastewater treatment device for water pollution prevention and control in the papermaking industry, comprising a wastewater treatment tank (1), a protective cover (2), and a transition frame (16), wherein the protective cover (2) and the transition frame (16) are fixed to the top of the wastewater treatment tank (1) by spot welding, characterized in that, The protective cover (2) is movably connected to an I-shaped plate (3), and cam blocks (4) are symmetrically fixed on both sides of the I-shaped plate (3) by spot welding; a flocculant storage box (8) is fixed to the sewage treatment tank (1) by bolts, and a mixing and discharging mechanism (7) is installed on the flocculant storage box (8). The bottom of the flocculant storage box (8) is evenly provided with discharge holes (9). The inner walls of both sides of the sewage treatment tank (1) are symmetrically fixed with air chambers (10) by bolts. The bottom of the sewage treatment tank (1) is evenly laid with branch pipes (15). The bottom of the air chambers (10) is connected to a one-way air outlet pipe (14), and one end of the one-way air outlet pipe (14) is connected to each branch pipe (15); the sewage treatment tank (1) The inner walls of the two sides of the wastewater treatment tank (1) are slidably connected to sliders (18), and scrapers (19) are slidably connected to the bottom of the sliders (18). A filter chamber (23) is opened in the wastewater treatment tank (1), and a screen plate (24) is installed on the filter chamber (23). A rotating arm (5) is movably connected to the outer side of the cam block (4) on the I-shaped plate (3). A rotating arm (17) is rotatably connected to the bottom inner wall of the transition frame (16) through a bearing. One end of the rotating arm (5) is movably connected to the outer side of the rotating arm (17). The U-shaped clamp fixed at the end of the rotating arm (17) is engaged with the protrusion on one side of the slider (18). Limit blocks are symmetrically fixed to the inner walls of the two sides of the wastewater treatment tank (1) and to the two sides of the slider (18) by bolts. (22) Springs 2 (20) are uniformly and symmetrically installed on the inner wall of the slider (18), and one end of the springs 2 (20) is connected to the scraper (19). Limiting posts (21) are symmetrically fixed on both sides of the scraper (19) by spot welding, and one side of the limiting post (21) abuts against the limiting block (22). The mixing and discharging mechanism (7) includes a rotating shaft (701), an extension arm (702) and a sealing sleeve (704). The bottom inner wall of the sewage treatment tank (1) is movably connected to the rotating shaft (701) through the bearing. One end of the rotating shaft (701) passes through the flocculant storage box (8) and is fixedly connected to a gear. The rotating shaft (701) is located inside the flocculant storage box (8) and is slidably connected to the sealing sleeve (704). The sealing sleeve (704) penetrates the bottom of the flocculant storage box (8) on one side and is symmetrically connected to the connecting rod (705). The outer wall of the rotating shaft (701) is symmetrically connected to the extension arm (702). One end of the extension arm (702) is fixed with a counterweight ball (703) by spot welding. The other end of the extension arm (702) is movably connected to the connecting rod (705). The air chamber (10) is slidably connected to the piston rod (11). One end of the piston rod (11) penetrates the inner wall of the sewage treatment tank (1) and abuts against the cam block (4). The piston rod (11) is fitted with a spring (12) on the sewage treatment tank (1). One side of the air chamber (10) is connected to a one-way air inlet pipe (13).A motor (6) is bolted to the inner wall of the protective cover (2). A gear is fixed to the output end of the motor (6). The gear on the output end of the motor (6) meshes with a gear sleeved on the I-shaped disc (3). The gear sleeved on the I-shaped disc (3) meshes with a gear at the end of the rotating shaft (701).

2. A wastewater treatment device for water pollution control in the papermaking industry according to claim 1, characterized in that, The wastewater treatment method for water pollution prevention in the papermaking industry is as follows: wastewater enters through the inlet pipe on one side of the wastewater treatment tank (1). At the same time, according to the amount of wastewater entering the wastewater treatment tank (1), flocculant is added to the flocculant storage box (8). The motor (6) located inside the protective cover (2) is started. The rotation of the motor (6) drives the rotating shaft (701) to rotate. The extension arm (702) located on the rotating shaft (701) rotates to accelerate the combination of flocculant and wastewater. The cam block (4) on the I-shaped disk (3) rotates and continuously presses the piston rod (11) located on the wastewater treatment tank (1). The piston rod (11) presses down to squeeze the air in the air chamber (10) into the one-way air outlet pipe (14). The air then emerges from the bottom of the wastewater treatment tank (1) with the branch pipe (15) and carries the suspended impurities to the water surface. The rotation of the I-shaped disk (3) The rotating arm (5) on both sides of the cam block (4) moves, and the slider (18) connected to the rotating arm (17) moves left and right on the inner wall of the sewage treatment tank (1). When the scraper (19) on the slider (18) moves to one side, the limiting post (21) abuts against the upper limit block (22) on the inner wall of the sewage treatment tank (1), causing the scraper (19) at the end of the slider (18) to move downward, pushing the impurities on the water surface to one side. Then the limiting post (21) and the limiting block (22) separate, and the slider (18) moves in the opposite direction, causing the scraper (19) to leave the water surface. The scraper (19) moves repeatedly, continuously pushing the suspended impurities to one side of the filter chamber (23). After being intercepted by the screen plate (24), the suspended matter finally accumulates at the bottom of the filter chamber (23). After a single treatment, the sewage is discharged from the sewage treatment tank (1).

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