Flocculating agent adding equipment for sewage treatment

Abstract

The invention discloses flocculating agent adding equipment for sewage treatment, and relates to the technical field of sewage treatment.The flocculating agent adding equipment comprises a shell, the shell is fixedly connected with a box body, a through hole is formed in the top of the shell, the shell communicates with the box body through the through hole, and a filter plate is fixedly connected to the middle of the shell; the inner wall of the shell is rotatably connected with a rotating rod, the rotating rod is fixedly connected with the output end of the motor, and the outer wall of the rotating rod is fixedly connected with a stirring rod. According to the flocculating agent adding equipment for sewage treatment, a flocculating agent is screened through a filter screen, the situation that the agglomerated flocculating agent directly enters the mixing box, consequently, the flocculating agent and water in the mixing box are mixed unevenly, and the sewage treatment effect is affected is avoided, by arranging a spiral plate, the agglomerated flocculating agent which does not meet the standard moves along with the spiral plate, and therefore the flocculating agent adding efficiency is improved. And under the action of centrifugal force and the elastic force of the spring, the ball vibrates in the two spiral plates, so that the agglomerated flocculant is knocked.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to flocculant dosing equipment for sewage treatment. Background Art

[0002] Sewage treatment is to put sewage into the sewage treatment tank of the sewage treatment plant, and then treat the sewage through flocculation, sedimentation, ionization, magnetic separation, filtration and other steps to make the sewage meet the water quality requirements for discharge into a certain water body or reuse. Among them, flocculation refers to the placement of corresponding types of flocculants in the sewage treatment tank to treat suspended matter and harmful substances in the sewage, so that they are precipitated and aggregated into granular objects, making them easy to separate.

[0003] The existing flocculant delivery device usually uses a delivery device to sprinkle the flocculant on the surface of the sewage treatment pool. In order to accelerate the mixing of the flocculant and sewage and make the floccules appear quickly, it is usually necessary to use a stirring device to stir the flocculant after the flocculant is delivered, which wastes time. At the same time, due to the influence of the storage environment and time, the dry powder flocculant will clump, resulting in poor sewage treatment effect. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A flocculant dosing device for sewage treatment, comprising a mixing box, the mixing box having a connected bottom plate, a control box fixedly connected to the top of the mixing box, and a lifting block arranged in the middle of the top of the mixing box, a water inlet pipe fixedly connected to the top of the mixing box, a motor fixedly connected to the outside of the mixing box, and a water outlet pipe fixedly connected to the outside of the mixing box. By setting the mixing box, dry powder flocculant is mixed with water to avoid directly putting the powder flocculant into the sewage pool. The solution is put into the sewage pool, so that the flocculant is diffused more widely, and the uniformity of the distribution of the flocculant in the sewage is improved; A screening box, the screening box is fixedly installed on the top of the mixing box; A dry powder bin, the dry powder bin being fixedly mounted on the top of the lifting block on the mixing box; The water outlet pipe and the motor are arranged on adjacent outer sides, the screening box, the dry powder bin and the water inlet pipe are arranged in sequence on the top central axis of the mixing box, the control box is arranged at the edge of the mixing box, a transmission member is arranged on the side of the mixing box away from the motor, and the discharge pipe of the dry powder bin is fixedly connected to the outer side of the box body; The screening box comprises a box body, the internal rotation of which is connected with a rotating shaft, which penetrates the box body and is connected with a transmission member. When working, the flocculant inside the dry powder bin enters the filter screen through the discharge pipe, and the motor is connected to an external power supply, so that the motor drives the rotating shaft to rotate through the transmission member, so that the rotating shaft drives the spiral plate to rotate, and the flocculant with a small volume that meets the standard passes through the filter screen. By setting the filter screen, the flocculant is screened to prevent the agglomerated flocculant from directly entering the mixing box, resulting in a slow mixing speed of the flocculant and the water inside the mixing box, and uneven mixing, which affects the sewage treatment effect. By setting the spiral plate, the agglomeration that does not meet the standard is prevented The flocculant moves with the spiral plate, and under the action of centrifugal force and spring elastic force, the ball vibrates inside the two spiral plates, thereby knocking the agglomerated flocculant; the inner wall of the box is fixedly connected to a filter screen, the rotating shaft is located on the axis of the filter screen, the outer side of the rotating shaft is fixedly connected to a spiral plate, the outer wall of the spiral plate is fixedly connected to a spring, the end of the spring away from the spiral plate is fixedly connected to a ball, the spring is symmetrically arranged with the ball as the center, there are multiple spiral plates, and the multiple spiral plates are evenly distributed with the rotating shaft as the center, and the end of the spring away from the ball is respectively fixedly connected to two adjacent spiral plates.

[0005] Preferably, a support rod is fixedly connected to the middle part of the outer side of the rotating shaft, and the support rod is located in the middle of the two spiral plates. During operation, the rotating shaft drives the support rod to rotate, and the support rod drives the brush to rotate, so that the brush cleans the inner wall of the filter to avoid clogging of the filter and reduce working efficiency. The end of the support rod away from the rotating shaft is fixedly connected to the brush, and the inner wall of the box is provided with a sealing mechanism, and the sealing mechanism is located below the filter.

[0006] Preferably, the sealing mechanism includes a rotating rod, which is rotatably connected to the box body, and the rotating rod is symmetrically arranged inside the box body. The outer wall of the rotating rod is fixedly connected with a sealing plate. In the initial state, under the elastic force of the spring plate, the two sealing plates are horizontal, and the protrusion is made of rubber. At this time, through the cooperation between the grooves and the protrusions on the two sealing plates, the two sealing plates are just parallel to the inner cavity of the box body. By setting the sealing plate, the screened flocculant does not directly enter the interior of the mixing box, and at the same time, it is prevented that part of the water splashes onto the filter screen during mixing and stirring inside the mixing box, resulting in clogging of the outer wall of the filter screen, which requires maintenance and affects work efficiency. There are two sealing plates, and a groove is opened on the sealing plate near the middle of the box body. A protrusion is fixedly connected to the side of the sealing plate close to the groove. The protrusions and grooves on the two sealing plates are staggered, and the protrusion is located inside the groove.

[0007] Preferably, the sealing plate is fixedly connected to an elastic plate at one end away from the filter screen, and the sealing plate has a tooth groove at one end close to the box body. The inner wall of the box body is slidably connected to a rack, and the rack is meshed with the sealing plate gear through the tooth groove. The bottom of the rack is fixedly connected to a connecting plate, and the end of the elastic plate away from the sealing plate is fixedly connected to a connecting plate, and the top of the connecting plate is fixedly connected to the elastic plate.

[0008] Preferably, the mixing box includes an outer shell, the outer shell is fixedly connected to the box body, a through hole is opened on the top of the outer shell, the outer shell is communicated with the box body through the through hole, a filter plate is fixedly connected to the middle of the outer shell, the inner wall of the outer shell is rotatably connected to a rotating rod, the rotating rod is fixedly connected to the output end of the motor, and the outer wall of the rotating rod is fixedly connected to a stirring rod. When working, the aqueous solution is added through the water inlet pipe, and the motor is connected to the external power supply at the same time. The motor drives the rotating rod to rotate, so that the rotating rod drives the stirring rod to rotate, thereby accelerating the flow of water inside the mixing box, so that the dry powder floccules The coagulant is mixed evenly with water, and a rotating plate is fixedly connected to the outer wall of the rotating rod, and there are three rotating plates, which are evenly distributed with the rotating rod as the center. A sliding groove is provided on the outer wall of the rotating plate, and a slider is slidably connected to the inner wall of the sliding groove, and the top of the slider is set in an arc shape. When working, the motor drives the rotating rod to rotate, and the rotating rod drives the rotating plate to rotate. Under the action of the elastic force of the elastic rope and the centrifugal force, the slider moves in the direction away from the rotating rod inside the sliding groove, and at the same time, the slider contacts with the connecting plate at the top as the rotating plate rotates, and a force is generated between the slider and the connecting plate. The connecting plate drives the rack to move upward, and then drives the sealing plate to rotate around the rotating rod, and the flocculant on the top falls into the mixing box. The different rotation speeds of the motor cause the slider to be at different distances from the rotating rod in the slide slot, and then the sealing plate rotates at different angles, so that the amount of flocculant falling is different. By setting the slider, the amount of flocculant falling into the mixing box can be adjusted according to the rotation speed of the motor, so that the mixing is more uniform. The outer wall of the slider is fixedly connected with an elastic rope. In the initial state, the elastic rope is in a tight state, and the two ends of the elastic rope are connected to the two adjacent sliders. The blocks are fixedly connected, and one end of the rotating plate close to the filter plate is fixedly connected with a curved plate. During mixed dissolution, some flocculants are stacked into blocks. During operation, the motor drives the rotating rod to rotate, the rotating rod drives the rotating plate to rotate, and the rotating plate drives the curved plate to rotate, so that the roller rolls on the filter plate to scrape the surface of the filter plate. By setting the filter plate, the agglomerated flocculant in the water is filtered to prevent the agglomerated flocculant from directly entering the sewage pool through the outlet pipe, resulting in drug waste, prolonging the dissolution of the agglomerated flocculant and water, and effectively improving the utilization rate of the drug. The curved plate is rotatably connected with a roller at one end close to the filter plate.

[0009] The present invention provides a flocculant dosing device for sewage treatment, which has the following beneficial effects: 1. The flocculant dosing equipment for sewage treatment screens the flocculant through a filter screen to prevent the agglomerated flocculant from directly entering the mixing box, which causes the flocculant to mix slowly and unevenly with the water in the mixing box, thus affecting the sewage treatment effect. By setting a spiral plate, the flocculant that does not meet the standard agglomeration moves with the spiral plate. Under the action of centrifugal force and spring force, the ball vibrates inside the two spiral plates, thereby knocking the agglomerated flocculant.

[0010] 2. The flocculant dosing equipment for sewage treatment cooperates between the grooves and the protrusions on the two sealing plates. The two sealing plates are just parallel to the inner cavity of the box. By setting the sealing plates, the screened flocculant does not directly enter the mixing box, and at the same time, it prevents part of the water from splashing onto the filter during mixing and stirring inside the mixing box, causing the outer wall of the filter to be blocked, which in turn requires maintenance and affects work efficiency.

[0011] 3. The flocculant dosing equipment for sewage treatment has different amounts of flocculant falling due to different rotation speeds of the motor, different distances of the slider in the slide slot away from the rotating rod, and thus different rotation angles of the sealing plate. By setting the slider, the amount of flocculant falling into the mixing box can be adjusted according to the rotation speed of the motor, making the mixing more uniform.

[0012] 4. The flocculant dosing equipment for sewage treatment, when mixed and dissolved, some flocculants are stacked into blocks, the rotating rod drives the rotating plate to rotate, the rotating plate drives the curved plate to rotate, so that the roller rolls on the filter plate, and the surface of the filter plate is scraped. By setting the filter plate, the agglomerated flocculant in the water is filtered to prevent the agglomerated flocculant from directly entering the sewage pool through the outlet pipe, resulting in drug waste, prolonging the dissolution of the agglomerated flocculant and water, and effectively improving the utilization rate of the drug. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the external structure of a flocculant dosing device for sewage treatment according to the present invention; Figure 2 It is a schematic diagram of the side view structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 It is a schematic diagram of the structure of a partial cross-sectional view of the screening box of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the screening box of the present invention; Figure 6 It is a schematic diagram of the local structure of the screening box of the present invention; Figure 7 It is a schematic diagram of the sealing mechanism structure of the present invention; Figure 8 For the present invention Figure 7 The structure diagram of the enlarged figure at A in the middle; Fig. 9 It is a cross-sectional structural schematic diagram of the mixing box of the present invention; Fig.10 It is a schematic diagram of the local structure of the mixing box of the present invention.

[0014] In the figure: 1. mixing box; 11. outer shell; 12. filter plate; 13. rotating rod; 14. stirring rod; 15. rotating plate; 16. slide groove; 17. slider; 18. elastic rope; 19. curved plate; 110. roller; 2. screening box; 21. box body; 22. sealing mechanism; 221. rotating rod; 222. sealing plate; 223. rack; 224. spring plate; 225. connecting plate; 226. groove; 227. bump; 23. rotating shaft; 24. filter screen; 25. spiral plate; 26. spring; 27. ball; 28. supporting rod; 29. ​​brush; 3. control box; 4. dry powder bin; 5. water outlet pipe; 6. motor; 7. water inlet pipe. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0016] The first embodiment, as Figures 1 to 6 As shown, the present invention provides a technical solution: a flocculant dosing device for sewage treatment, comprising a mixing box 1, the mixing box 1 having a connected bottom plate, a control box 3 fixedly connected to the top of the mixing box 1, and a lifting block arranged in the middle of the top of the mixing box 1, a water inlet pipe 7 fixedly connected to the top of the mixing box 1, a motor 6 fixedly connected to the outside of the mixing box 1, and a water outlet pipe 5 fixedly connected to the outside of the mixing box 1. By setting the mixing box 1, a dry powder flocculant is mixed with water, avoiding the powder flocculant from being directly put into the sewage pool, and the solution is put into the sewage pool, so that the flocculant is diffused more widely, and the uniformity of the distribution of the flocculant in the sewage is improved; Screening box 2, the screening box 2 is fixedly installed on the top of the mixing box 1; A dry powder bin 4, which is fixedly mounted on the top of a lifting block on the mixing box 1; The water outlet pipe 5 and the motor 6 are arranged on adjacent outer sides, the screening box 2, the dry powder bin 4 and the water inlet pipe 7 are arranged in sequence on the top central axis of the mixing box 1, the control box 3 is arranged at the edge of the mixing box 1, and a transmission member is arranged on the side of the mixing box 1 away from the motor 6, and the discharge pipe of the dry powder bin 4 is fixedly connected to the outer side of the box body 21; The screening box 2 comprises a box body 21, and the internal rotation of the box body 21 is connected with a rotating shaft 23, and the rotating shaft 23 penetrates the box body 21 and is connected with a transmission member. When working, the flocculant in the dry powder bin 4 enters the filter screen 24 through the discharge pipe, and the motor 6 is connected to an external power supply to work, so that the motor 6 drives the rotating shaft 23 to rotate through the transmission member, so that the rotating shaft 23 drives the spiral plate 25 to rotate, and the flocculant with a small volume that meets the standard passes through the filter screen 24. By setting the filter screen 24, the flocculant is screened to prevent the agglomerated flocculant from directly entering the mixing box 1, resulting in a slow mixing speed of the flocculant and the water in the mixing box 1, and the mixing is uneven, which affects the sewage treatment effect. By setting the spiral plate 25, the flocculants that do not meet the standard agglomeration The coagulant moves with the spiral plate 25, and under the action of centrifugal force and the elastic force of the spring 26, the ball 27 vibrates inside the two spiral plates 25, thereby knocking the agglomerated flocculant, the inner wall of the box body 21 is fixedly connected with the filter screen 24, the rotating shaft 23 is located on the axis of the filter screen 24, the outer side of the rotating shaft 23 is fixedly connected with the spiral plate 25, the outer wall of the spiral plate 25 is fixedly connected with the spring 26, the end of the spring 26 away from the spiral plate 25 is fixedly connected with the ball 27, the spring 26 is symmetrically arranged with the ball 27 as the center, there are multiple spiral plates 25, and the multiple spiral plates 25 are evenly distributed with the rotating shaft 23 as the center, and the end of the spring 26 away from the ball 27 is respectively fixedly connected to the two adjacent spiral plates 25.

[0017] A support rod 28 is fixedly connected to the middle part of the outer side of the rotating shaft 23, and the support rod 28 is located in the middle of the two spiral plates 25. When working, the rotating shaft 23 drives the support rod 28 to rotate, and the support rod 28 drives the brush 29 to rotate, so that the brush 29 cleans the inner wall of the filter 24 to avoid clogging of the filter 24 and reduce working efficiency. The end of the support rod 28 away from the rotating shaft 23 is fixedly connected to the brush 29, and the inner wall of the box body 21 is provided with a sealing mechanism 22, and the sealing mechanism 22 is located below the filter 24.

[0018] The second embodiment is based on the first embodiment. Figures 7 and 8As shown, the sealing mechanism 22 includes a rotating rod 221, which is rotatably connected to the box body 21, and the rotating rod 221 is symmetrically arranged inside the box body 21. The outer wall of the rotating rod 221 is fixedly connected with a sealing plate 222. In the initial state, under the elastic force of the spring plate 224, the two sealing plates 222 are horizontal, and the protrusion 227 is made of rubber. At this time, through the cooperation between the grooves 226 and the protrusions 227 on the two sealing plates 222, the two sealing plates 222 are just parallel to the inner cavity of the box body 21. By setting the sealing plate 222, The screened flocculant does not directly enter the mixing box 1, and at the same time, it prevents part of the water from splashing onto the filter screen 24 during mixing and stirring inside the mixing box 1, causing the outer wall of the filter screen 24 to be blocked, which in turn requires maintenance and affects work efficiency. There are two sealing plates 222, and a groove 226 is provided on the sealing plate 222 near the middle of the box body 21. A protrusion 227 is fixedly connected to one side of the sealing plate 222 near the groove 226. The protrusions 227 and the grooves 226 on the two sealing plates 222 are staggered, and the protrusion 227 is located inside the groove 226.

[0019] The sealing plate 222 is fixedly connected to the end away from the filter screen 24 with a spring plate 224, and the sealing plate 222 has a tooth groove at the end close to the box body 21. The inner wall of the box body 21 is slidably connected with a rack 223, and the rack 223 is meshed with the sealing plate 222 gear through the tooth groove. The bottom of the rack 223 is fixedly connected to a connecting plate 225, and the end of the spring plate 224 away from the sealing plate 222 is fixedly connected to the connecting plate 225, and the top of the connecting plate 225 is fixedly connected to the spring plate 224.

[0020] The third embodiment is based on the first and second embodiments. Figures 9 and 10As shown, the mixing box 1 includes a shell 11, the shell 11 is fixedly connected to the box body 21, a through hole is opened on the top of the shell 11, the shell 11 is connected to the box body 21 through the through hole, a filter plate 12 is fixedly connected to the middle of the shell 11, the inner wall of the shell 11 is rotatably connected to a rotating rod 13, the rotating rod 13 is fixedly connected to the output end of the motor 6, and the outer wall of the rotating rod 13 is fixedly connected to a stirring rod 14. When working, the aqueous solution is added through the water inlet pipe 7, and the motor 6 is connected to the external power supply to work, and the motor 6 drives the rotating rod 13 to rotate, so that the rotating rod 13 drives the stirring rod 14 to rotate, so as to accelerate the flow of water inside the mixing box 1, so that the dry powder flocculant and water are evenly mixed, and the rotating rod 13 is rotated. The outer wall of the rod 13 is fixedly connected with a rotating plate 15, and there are three rotating plates 15, which are evenly distributed around the rotating rod 13. A sliding groove 16 is provided on the outer wall of the rotating plate 15, and a slider 17 is slidably connected to the inner wall of the sliding groove 16. The top of the slider 17 is set in an arc shape. When working, the motor 6 drives the rotating rod 13 to rotate, and the rotating rod 13 drives the rotating plate 15 to rotate. Under the action of the elastic force of the elastic rope 18 and the centrifugal force, the slider 17 moves in the direction away from the rotating rod 13 inside the sliding groove 16. At the same time, the slider 17 will contact with the top connecting plate 225 as the rotating plate 15 rotates, and a force is generated between the slider 17 and the connecting plate 225, so that the connecting plate 225 can be connected to the rotating plate 13. The plate 225 drives the rack 223 to move upward, thereby driving the sealing plate 222 to rotate around the rotating rod 221, and the flocculant on the top falls into the mixing box 1. The rotation speed of the motor 6 is different, and the distance of the slider 17 away from the rotating rod 13 in the slide groove 16 is different, and then the sealing plate 222 rotates at different angles, so that the amount of flocculant falling is different. By setting the slider 17, the amount of flocculant falling into the mixing box 1 can be adjusted according to the rotation speed of the motor 6, so that the mixing is more uniform. The outer wall of the slider 17 is fixedly connected with an elastic rope 18. In the initial state, the elastic rope 18 is in a taut state, and the two ends of the elastic rope 18 are fixedly connected to the two adjacent sliders 17. One end of the plate 15 close to the filter plate 12 is fixedly connected with a curved plate 19. During mixed dissolution, some flocculants are stacked into blocks. During operation, the motor 6 drives the rotating rod 13 to rotate, the rotating rod 13 drives the rotating plate 15 to rotate, and the rotating plate 15 drives the curved plate 19 to rotate, so that the roller 110 rolls on the filter plate 12 to scrape the surface of the filter plate 12 to avoid clogging of the filter plate 12. By setting the filter plate 12, the agglomerated flocculant in the water is filtered to avoid the agglomerated flocculant directly entering the sewage pool through the outlet pipe, resulting in drug waste, prolonging the dissolution of the agglomerated flocculant and water, and effectively improving the utilization rate of the drug. The curved plate 19 is rotatably connected with the roller 110 at one end close to the filter plate 12.

[0021] When in use, aqueous solution is added through the water inlet pipe 7, so that the motor 6 is connected to an external power supply to work, the motor 6 works to drive the rotating rod 13 to rotate, the motor 6 drives the rotating rod 13 to rotate, and the rotating rod 13 drives the rotating plate 15 to rotate. Under the action of the elastic force of the elastic rope 18 and the centrifugal force, the slider 17 moves in the direction away from the rotating rod 13 inside the slide groove 16. At the same time, the slider 17 will contact with the top connecting plate 225 as the rotating plate 15 rotates, and a force is generated between the slider 17 and the connecting plate 225, so that the connecting plate 225 drives the rack 223 to move upward, and then drives the sealing plate 222 to rotate around the rotating rod 221. At the same time, the motor 6 drives the rotating shaft 23 to rotate through the transmission member, so that the rotating shaft 23 drives the spiral plate 25 to rotate, and the flocculant with a small standard volume passes through the filter screen 24. At this time, the flocculant on the top falls into the mixing box 1, so that the rotating rod 13 drives the stirring rod 14 to rotate, accelerates the flow of water inside the mixing box 1, and makes the dry powder flocculant and water mixed evenly.

[0022] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A flocculant dosing device for sewage treatment, characterized in that: include: A mixing box (1), the mixing box (1) having a bottom plate for connecting and supporting, a control box (3) fixedly connected to the top of the mixing box (1), and a lifting block arranged in the middle of the top of the mixing box (1), a water inlet pipe (7) fixedly connected to the top of the mixing box (1), a motor (6) fixedly connected to the outside of the mixing box (1), and a water outlet pipe (5) fixedly connected to the outside of the mixing box (1); A screening box (2), wherein the screening box (2) is fixedly mounted on the top of the mixing box (1); A dry powder bin (4), the dry powder bin (4) being fixedly mounted on the top of a lifting block on the mixing box (1); The water outlet pipe (5) and the motor (6) are arranged on adjacent outer sides; the screening box (2), the dry powder bin (4) and the water inlet pipe (7) are arranged in sequence on the top central axis of the mixing box (1); the control box (3) is arranged at the edge of the mixing box (1); a transmission member is provided on the side of the mixing box (1) away from the motor (6); and the discharge pipe of the dry powder bin (4) is fixedly connected to the outer side of the box body (21); The screening box (2) comprises a box body (21), the interior of the box body (21) is rotatably connected to a rotating shaft (23), the rotating shaft (23) passes through the box body (21) and is connected to a transmission member, the inner wall of the box body (21) is fixedly connected to a filter screen (24), the rotating shaft (23) is located on the axis of the filter screen (24), the outer side of the rotating shaft (23) is fixedly connected to a spiral plate (25), the outer wall of the spiral plate (25) is fixedly connected to a spring (26), the end of the spring (26) away from the spiral plate (25) is fixedly connected to a ball (27), and the spring (26) is symmetrically arranged with the ball (27) as the center.

2. The flocculant dosing device for sewage treatment according to claim 1, characterized in that: There are a plurality of spiral plates (25), and the plurality of spiral plates (25) are evenly distributed around the rotating shaft (23), and one end of the spring (26) away from the ball (27) is fixedly connected to two adjacent spiral plates (25).

3. The flocculant dosing device for sewage treatment according to claim 2, characterized in that: A support rod (28) is fixedly connected to the middle portion of the outer side of the rotating shaft (23), the support rod (28) is located between the two spiral plates (25), and a brush (29) is fixedly connected to one end of the support rod (28) away from the rotating shaft (23). A sealing mechanism (22) is provided on the inner wall of the box body (21), and the sealing mechanism (22) is located below the filter screen (24).

4. The flocculant dosing device for sewage treatment according to claim 3 is characterized by: The sealing mechanism (22) comprises a rotating rod (221), the rotating rod (221) being rotatably connected to the box body (21), the rotating rod (221) being symmetrically arranged inside the box body (21), the outer wall of the rotating rod (221) being fixedly connected to a sealing plate (222), and there are two sealing plates (222).

5. The flocculant dosing device for sewage treatment according to claim 4, characterized in that: A groove (226) is provided in the middle of the sealing plate (222) close to the box body (21); a protrusion (227) is fixedly connected to one side of the sealing plate (222) close to the groove (226); the protrusions (227) and the grooves (226) on the two sealing plates (222) are staggered, and the protrusions (227) are located inside the grooves (226).

6. The flocculant dosing device for sewage treatment according to claim 5, characterized in that: An end of the sealing plate (222) away from the filter screen (24) is fixedly connected to a spring plate (224), an end of the sealing plate (222) close to the box body (21) has a tooth groove, and an inner wall of the box body (21) is slidably connected to a rack (223), and the rack (223) is meshed with the sealing plate (222) gear through the tooth groove.

7. The flocculant dosing device for sewage treatment according to claim 6, characterized in that: The bottom of the rack (223) is fixedly connected to a connecting plate (225), one end of the spring plate (224) away from the sealing plate (222) is fixedly connected to the connecting plate (225), and the top of the connecting plate (225) is fixedly connected to the spring plate (224).

8. The flocculant dosing device for sewage treatment according to claim 1, characterized in that: The mixing box (1) comprises an outer shell (11), the outer shell (11) being fixedly connected to a box body (21), a through hole being provided at the top of the outer shell (11), the outer shell (11) being connected to the box body (21) via the through hole, and a filter plate (12) being fixedly connected to the middle of the outer shell (11).

9. The flocculant dosing device for sewage treatment according to claim 8, characterized in that: The inner wall of the housing (11) is rotatably connected to a rotating rod (13), the rotating rod (13) is fixedly connected to the output end of the motor (6), the outer wall of the rotating rod (13) is fixedly connected to a stirring rod (14), the outer wall of the rotating rod (13) is fixedly connected to a rotating plate (15), the number of the rotating plates (15) is three, and the three rotating plates (15) are evenly distributed around the rotating rod (13).

10. The flocculant dosing device for sewage treatment according to claim 9, characterized in that: The outer wall of the rotating plate (15) is provided with a slide groove (16), the inner wall of the slide groove (16) is slidably connected to a slider (17), the outer wall of the slider (17) is fixedly connected to an elastic rope (18), the two ends of the elastic rope (18) are fixedly connected to two adjacent sliders (17), one end of the rotating plate (15) close to the filter plate (12) is fixedly connected to a curved plate (19), and one end of the curved plate (19) close to the filter plate (12) is rotatably connected to a roller (110).

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