Coagulation sedimentation pretreatment device and dynamic control method

Abstract

The present invention discloses a coagulation sedimentation pretreatment device and a dynamic control method, belonging to the technical field of water treatment. A lifting seat that reciprocates is slidably arranged on a sliding rod. The output end of a swing motor is provided with cooperating swing arms. Linkage arms are arranged on both sides of the lifting seat, and the linkage arms are movably connected to the swing arms; a plurality of connecting arms are fixedly arranged on the top of the lifting seat, and an annular scraping ring is fixedly arranged on the connecting arms; a plurality of inner filter holes are opened at the end of a shunt pipe. An arc plate coaxially arranged with the shunt pipe is fixedly arranged on the outer side of a support frame, and a baffle is fixedly arranged on the outer side of the arc plate. A moving filter screen is rotatably arranged in a storage cavity, and outer filter holes with diameters smaller than the inner filter holes are opened on the moving filter screen. In the present invention, the structure of the lifting seat improves the movement range of the dosing cantilever and avoids dead angles. When the lifting seat swings along the sliding rod while reciprocating up and down, the scraping ring can perform rotary reciprocating scraping and cleaning on the drainage groove. This structure is stable and effective and improves the flocculation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, specifically a coagulation sedimentation pretreatment device and a dynamic control method. Background Technique

[0002] At present, the turbidity of the effluent from the sedimentation tanks of water purification plants using conventional treatment processes in China is mostly between 1 and 3 NTU, and the turbidity of the effluent from the filter tanks generally does not exceed 1 NTU; after the domestic conventional treatment process, it is necessary to add membrane filtration for advanced treatment to make the turbidity of the water supply reach a level not higher than 0.1 NTU. In order to ensure that the water supply quality meets the drinking water quality standard without increasing the operating cost, many water treatment technologies have been developed at home and abroad from aspects such as pretreatment, strengthening of conventional processes, and advanced treatment. Among them, the coagulation process is an indispensable key pre - process in the water treatment process flow. The quality of its effect often determines the operating conditions of the subsequent process flow, the final effluent quality, and the cost. Therefore, coagulation is one of the important research and development fields in water treatment engineering.

[0003] A patent application with the publication number CN117735690A discloses a sewage coagulation treatment device, which relates to the technical field of sewage treatment devices. This application includes: a storage barrel for storing sewage, an inlet pipe and an outlet pipe are installed on the storage barrel, and a stirring member is installed on the storage barrel, and the stirring member is used for stirring the sewage in the storage barrel; there are two dosing members, which are installed on the storage barrel, and the dosing members are used for putting flocculants or coagulant aids into the storage barrel. In this application, by installing a stirring member and dosing members on the storage barrel, when in use, the flocculants and coagulant aids are placed in different dosing members and are put into different inner cavities through the dosing members. When dosing, through the cooperation of the stirring member, the opening - closing member is driven, so that the opening - closing member first removes the occlusion of one opening, so that the flocculant is added into the storage barrel, and then as the stirring member continues to work, the other opening is opened, so that the coagulant aid is added into the storage barrel.

[0004] The automation degree and freedom of the above - mentioned disclosed sewage coagulation treatment device are general. When adding flocculants to the wastewater, there are easily dead corners, and after coagulation is completed, the wastewater cannot be filtered multiple times, lacking an adjustable multiple purification structure. Therefore, in view of the above - mentioned current situation, there is an urgent need to develop a coagulation sedimentation pretreatment device to overcome the deficiencies in current practical applications. Summary of the Invention

[0005] The purpose of the present invention is to provide a coagulation sedimentation pretreatment device and a dynamic control method to solve the problems that the automation degree and freedom of the existing sewage coagulation treatment device are general, there are easily dead corners when adding flocculants to the wastewater, and after coagulation is completed, the wastewater cannot be filtered multiple times, lacking an adjustable multiple purification structure, etc.

[0006] To achieve the above object, the technical solution of the present invention is as follows: a coagulation sedimentation pretreatment device, including a flocculation mechanism and a filtration mechanism. The flocculation mechanism includes a flocculation tank. A slide bar is fixedly arranged in the middle of the flocculation tank, and a lifting seat that reciprocates is slidably arranged on the slide bar. Symmetrical swing motors are installed on the outer wall of the flocculation tank. The output ends of the swing motors are provided with cooperating swing arms. Linkage arms are arranged on both sides of the lifting seat, and the linkage arms are movably connected to the swing arms. A ring groove is arranged at the top of the flocculation tank, and multiple groups of drainage grooves are opened at the top of the flocculation tank. Multiple groups of connecting arms are fixedly arranged at the top of the lifting seat, and an annular scraping ring is fixedly arranged on the connecting arms. When the lifting seat swings along the slide bar while reciprocating up and down, the scraping ring scrapes and cleans the drainage grooves. The filtration mechanism includes a diversion bin located below the flocculation tank. Symmetrical diversion pipes are arranged on both sides of the diversion bin. Multiple groups of inner filter holes are opened at the ends of the diversion pipes. A support frame is also installed on the diversion pipes. An arc plate coaxial with the diversion pipes is fixedly arranged on the outer side of the support frame. A baffle cooperating with the end of the diversion pipe is fixedly arranged on the outer side of the arc plate. A storage cavity is opened inside the arc plate, and a moving filter screen is rotatably arranged in the storage cavity. Outer filter holes with diameters smaller than the inner filter holes are opened on the moving filter screen.

[0007] As a further scheme of the present invention: Multiple groups of medicine adding cantilevers are arranged at intervals on the outer wall of the lifting seat, and multiple groups of spray pipes are arranged on the medicine adding cantilevers. An installation frame is arranged on the outer wall of the flocculation tank, a medicine storage cylinder is arranged on the installation frame, a pressure pump is installed at the discharge port of the medicine storage cylinder, and the pressure pump is communicated with the lifting seat through a hose.

[0008] As a further scheme of the present invention: A spherical cavity is opened inside the swing arm, a ball seat is installed inside the spherical cavity, and the linkage arm penetrates through the ball seat and is movably connected to it.

[0009] As a further scheme of the present invention: A discharge pipe located above the diversion bin is arranged at the bottom of the flocculation tank, and a valve I is installed on the discharge pipe. A water outlet pipe is arranged at the bottom of the ring groove, and a control panel is also arranged on the outer wall of the flocculation tank.

[0010] As a further scheme of the present invention: An inner cavity cooperating with the diversion pipe is opened on the support frame, and an outer cavity cooperating with the end of the diversion pipe is opened on the baffle. A discharge pipe is also arranged at the end of the diversion pipe, and a valve II is installed on the discharge pipe.

[0011] As a further solution of the present invention: a rotating groove communicating with the storage cavity is formed on the support frame, a gear ring is fixedly connected to one side of the moving filter screen, and the moving filter screen is rotatably arranged on the support frame through the gear ring; an adjusting motor is further installed on the support frame, and a driving gear meshing with the gear ring is installed at the output end of the adjusting motor.

[0012] As a further solution of the present invention: a sealing track is fixedly arranged on the outer side of the moving filter screen, and a sealing groove matching with it is formed on the inner wall of the baffle.

[0013] As a further solution of the present invention: a through sliding seat is formed at the top of the shunt pipe, a scraping member is slidably arranged on the sliding seat, and a cleaning cylinder is further installed on the support frame, and the output end of the cleaning cylinder is fixedly connected to the scraping member.

[0014] As a further solution of the present invention: the scraping member includes two parts, an inner ring and an outer ring. The inner ring abuts against the inner wall of the shunt pipe; the outer ring is composed of a lower scraping part and an upper scraping part. The lower scraping part abuts against the inner wall of the moving filter screen, and the upper scraping part abuts against the inner wall of the arc plate.

[0015] As a further solution of the present invention: a dynamic control method for the coagulation sedimentation pretreatment device includes: S1. Adding a flocculant into the flocculation tank through multiple dosing cantilevers and spray pipes on the lifting seat, and synchronously swinging when the lifting seat reciprocates up and down along the sliding rod; S2. The impurities in the water of the flocculation tank react with the flocculant to generate flocs and accumulate at the bottom of the flocculation tank, and the upper clarified water is discharged through the ring groove; S3. The bottom water containing a large amount of flocs enters the shunt bin and the shunt pipe through the discharge pipe; S4. When it is necessary to filter the bottom water multiple times, start the adjusting motor and drive the moving filter screen to rotate. At this time, the bottom water sequentially passes through the inner filter holes and the outer filter holes to complete double filtration; S5. When only single filtration is required, start the adjusting motor and drive the moving filter screen to retract into the storage cavity. At this time, the bottom water realizes single filtration through the inner filter holes.

[0016] The present invention provides a coagulation sedimentation pretreatment device and a dynamic control method by improvement. Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can add a flocculant into the flocculation tank through the cooperation of the medicine storage cylinder and the spray pipe. When the swing motors on both sides drive the swing arms to rotate, under the cooperation of the ball seat and the linkage arm, the lifting seat swings and reciprocates up and down at the same time, thereby increasing the movement range of the dosing cantilever and avoiding dead corners. When the lifting seat swings and reciprocates up and down along the sliding rod, the scraping ring can scrape and clean the drainage groove, avoiding the blockage of the drainage groove structure by a small amount of flocs. This structure is stable and effective, and also improves the flocculation effect of the coagulation sedimentation pretreatment device.

[0018] 2. The present invention can filter the bottom water containing a large amount of flocs deposited at the bottom of the flocculation tank through the internal filter holes on the shunt pipe. When it is necessary to filter the bottom water multiple times, start the adjustment motor and drive the moving filter screen to rotate. At this time, the bottom water passes through the internal filter holes and the external filter holes in sequence to complete double filtration. When only single filtration is required, start the adjustment motor and drive the moving filter screen to retract into the storage cavity. This design improves the freedom and filtration efficiency of the coagulation sedimentation pretreatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below in conjunction with the drawings and embodiments:

[0020] Figure 1 is the three-dimensional structure diagram of the present invention;

[0021] Figure 2 is the partial three-dimensional structure diagram of the shunt pipe in the present invention;

[0022] Figure 3 is the three-dimensional structure diagram of the flocculation tank in the present invention;

[0023] Figure 4 is the internal three-dimensional structure diagram of the flocculation mechanism in the present invention;

[0024] Figure 5 is the three-dimensional structure diagram of the swing arm and the ball seat in the present invention;

[0025] Figure 6 is the three-dimensional structure diagram of the swing arm in the present invention;

[0026] Figure 7 is the three-dimensional structure diagram of the lifting seat in the present invention;

[0027] Figure 8 is the three-dimensional structure diagram of the moving filter screen and the arc plate in the present invention;

[0028] Figure 9 is the three-dimensional structure diagram of the arc plate in the present invention;

[0029] Figure 10 is the three-dimensional structure diagram of the moving filter screen in the present invention;

[0030] Figure 11 is the partial cross-sectional view of the present invention;

[0031] Figure 12 is the three-dimensional structure diagram of the scraping member in the present invention.

[0032] Description of the reference numerals:

[0033] 1. Flocculation mechanism; 101. Flocculation tank; 102. Drain pipe; 103. Valve 1; 104. Ring groove; 105. Drainage groove; 106. Outlet pipe; 107. Control panel; 108. Slide bar; 109. Swing motor; 110. Swing arm; 111. Spherical cavity; 112. Ball seat; 113. Lifting seat; 114. Linkage arm; 115. Connecting arm; 116. Scratching ring; 117. Mounting bracket; 118. Medicine storage cylinder; 119. Pressure pump; 120. Hose; 121. Medicine adding cantilever; 122. Spray pipe;

[0034] 2. Filtration mechanism; 201. Shunt bin; 202. Shunt pipe; 203. Inner filter hole; 204. Sliding seat; 205. Discharge pipe; 206. Valve 2; 207. Support frame; 208. Inner opening cavity; 209. Baffle; 210. Arc plate; 211. Storage cavity; 212. Rotation groove; 213. Moving filter screen; 214. Gear ring; 215. Outer opening cavity; 216. Adjustment motor; 217. Driving gear; 218. Sealing track; 219. Sealing groove; 220. Cleaning cylinder; 221. Scratching part; 222. Inner ring; 223. Outer ring; 224. Outer filter hole; 225. Lower scratching part; 226. Upper scratching part. Detailed implementation manners

[0035] Next, the technical solutions of the present invention will be described clearly and completely in conjunction with the attached Figures 1 to 12 drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The present invention provides a coagulation and sedimentation pretreatment device through improvement, such as Figures 1 - 12As shown in the figure, it includes a flocculation mechanism 1 and a filtration mechanism 2. The flocculation mechanism 1 includes a flocculation tank 101. A slide bar 108 is fixedly arranged in the middle of the flocculation tank 101. A lifting seat 113 that reciprocates is slidably arranged on the slide bar 108. Swing motors 109 are symmetrically installed on the outer wall of the flocculation tank 101. The output ends of the swing motors 109 are provided with swing arms 110 that cooperate with each other. Linkage arms 114 are arranged on both sides of the lifting seat 113. The linkage arms 114 are movably connected to the swing arms 110. A ring groove 104 is arranged at the top of the flocculation tank 101. Multiple drainage grooves 105 are opened at the top of the flocculation tank 101. Multiple connecting arms 115 are fixedly arranged at the top of the lifting seat 113. A ring-shaped scraping ring 116 is fixedly arranged on the connecting arms 115. When the lifting seat 113 swings along the slide bar 108 while reciprocating up and down, the scraping ring 116 scrapes and cleans the drainage grooves 105. The filtration mechanism 2 includes a diversion bin 201 located below the flocculation tank 101. Symmetric diversion pipes 202 are arranged on both sides of the diversion bin 201. Multiple inner filter holes 203 are opened at the ends of the diversion pipes 202. A support frame 207 is also installed on the diversion pipes 202. An arc plate 210 coaxial with the diversion pipes 202 is fixedly arranged on the outside of the support frame 207. A baffle 209 that cooperates with the ends of the diversion pipes 202 is fixedly arranged on the outside of the arc plate 210. A storage cavity 211 is opened inside the arc plate 210. A moving filter screen 213 is rotatably arranged in the storage cavity 211. Outer filter holes 224 with a diameter smaller than the inner filter holes 203 are opened on the moving filter screen 213.

[0037] In this embodiment, the coagulation sedimentation pretreatment device is mainly divided into two parts: a flocculation mechanism 1 and a filtration mechanism 2. When the device is working, first, a flocculant is sprayed into the flocculation tank 101 through a pressure pump 119 and a spray pipe 122. When the swing motors 109 on both sides drive the swing arms 110 to rotate, the lifting seat 113 reciprocates up and down while reciprocatingly swinging along the sliding rod 108, so as to perform spraying operations on different depths in the vertical direction and different angles in the horizontal direction of the water body. After flocculation is completed, the clarified water on the upper layer is discharged through the annular groove 104 and the water outlet pipe 106 and enters the next treatment process. The bottom water containing a large amount of flocs at the bottom of the flocculation tank 101 falls into the diversion bin 201 and the diversion pipe 202 through the discharge pipe 102. When it is necessary to filter the bottom water multiple times, the adjustment motor 216 is started and the moving filter screen 213 is driven to rotate. When the moving filter screen 213 completely closes the bottom of the arc plate 210, at this time, the bottom water sequentially passes through the inner filter holes 203 and the outer filter holes 224 to complete double filtration. When only single filtration is required, the adjustment motor 216 is started and the moving filter screen 213 is driven to retract into the storage cavity 211. At this time, the bottom of the arc plate 210 is completely exposed. After filtration is completed, some flocs will remain inside the moving filter screen 213 and the diversion pipe 202. When it is necessary to clean the moving filter screen 213, the adjustment motor 216 is started and the moving filter screen 213 is driven to rotate a certain angle into the storage cavity 211, so as to expose the inner wall of the moving filter screen 213. When it is necessary to clean the diversion pipe 202, the discharge pipe 205 can be opened.

[0038] Refer to the appendix Figure 1 , appendix Figure 4 and appendix Figure 7 , a plurality of groups of medicine adding cantilevers 121 are arranged at intervals on the outer wall of the lifting seat 113, and a plurality of groups of spray pipes 122 are arranged on the medicine adding cantilevers 121; an installation frame 117 is arranged on the outer wall of the flocculation tank 101, a medicine storage cylinder 118 is arranged on the installation frame 117, a pressure pump 119 is installed at the discharge port of the medicine storage cylinder 118, and the pressure pump 119 is communicated with the lifting seat 113 through a hose 120.

[0039] In this embodiment: When spraying the flocculant into the flocculation tank 101 through the spray pipe 122, in order to avoid dead angles and thus affect the water purification effect, the swing arm 110 structure is designed. When the swing motors 109 on both sides drive the swing arms 110 to rotate, the lifting seat 113 reciprocates up and down while reciprocatingly swinging along the sliding rod 108, so as to perform spraying operations on different depths in the vertical direction and different angles in the horizontal direction of the water body.

[0040] Refer to the appendix Figure 5 -appendix Figure 6 , a spherical cavity 111 is formed inside the swing arm 110, a ball seat 112 is installed inside the spherical cavity 111, and the linkage arm 114 passes through the ball seat 112 and is movably connected thereto.

[0041] In this embodiment: The swing motors 109 on both sides drive the swing arms 110 to rotate in opposite directions. With the cooperation of the spherical cavity 111 and the ball seat 112, the rotational motion of the swing arms 110 can be converted into the reciprocating up-and-down motion of the lifting seat 113 and simultaneously with a swinging motion.

[0042] Refer to the attached Figure 1 and the attached Figure 3 , a discharge pipe 102 located above the diversion chamber 201 is provided at the bottom of the flocculation tank 101, and a first valve 103 is installed on the discharge pipe 102; a water outlet pipe 106 is provided at the bottom of the annular groove 104, and a control panel 107 is further provided on the outer wall of the flocculation tank 101.

[0043] In this embodiment: In order to control the overall operation of the device, the control panel 107 structure is designed. In order to control the opening and closing of the discharge pipe 102, thereby controlling the bottom water to enter the filtering mechanism 2 for filtering operation, the first valve 103 is designed.

[0044] Refer to the attached Figure 1 - the attached Figure 2 , an inner cavity 208 matching the diversion pipe 202 is provided on the support frame 207, and an outer cavity 215 matching the end of the diversion pipe 202 is provided on the baffle 209; a discharge pipe 205 is further provided at the end of the diversion pipe 202, and a second valve 206 is installed on the discharge pipe 205.

[0045] In this embodiment: After the filtration is completed, some flocs will remain on the inner wall and bottom of the diversion pipe 202. In order to facilitate the cleaning thereof, the discharge pipe 205 is designed.

[0046] Refer to the attached Figure 8 - the attached Figure 11 , a rotating groove 212 communicating with the storage cavity 211 is provided on the support frame 207. A gear ring 214 is fixedly connected to one side of the moving filter screen 213, and the moving filter screen 213 is rotatably arranged on the support frame 207 through the gear ring 214; an adjusting motor 216 is further installed on the support frame 207, and a driving gear 217 meshing with the gear ring 214 is installed at the output end of the adjusting motor 216.

[0047] In this embodiment: When it is necessary to filter the bottom water multiple times, the adjustment motor 216 is started to drive the moving filter screen 213 to rotate. When the bottom of the moving filter screen 213 completely closes the bottom of the arc plate 210, the bottom water sequentially passes through the inner filter holes 203 and the outer filter holes 224 to complete double filtration. When only single filtration is required, the adjustment motor 216 is started to drive the moving filter screen 213 to retract into the storage cavity 211, and at this time, the bottom of the arc plate 210 is completely exposed. To ensure the rotation and smooth operation of the structure, the radian of the arc plate 210 is greater than 180 degrees, the radian of the moving filter screen 213 is 180 degrees, and the rotating groove 212 does not penetrate the support frame 207 for 360 degrees, but is slightly less than 360 degrees.

[0048] Refer to the attached Figure 9 - attached Figure 10 On the outer side of the moving filter screen 213, a sealing track 218 is fixedly arranged, and a sealing groove 219 matching with it is opened on the inner wall of the baffle 209.

[0049] In this embodiment: In order to further improve the sealing performance, the mutually matching sealing track 218 and sealing groove 219 are designed to improve the sealing degree between the moving filter screen 213 and the baffle 209.

[0050] Refer to the attached Figure 10 - attached Figure 11 On the top of the shunt pipe 202, a through sliding seat 204 is opened, a scraping member 221 is slidably arranged on the sliding seat 204, and a cleaning cylinder 220 is also installed on the support frame 207. The output end of the cleaning cylinder 220 is fixedly connected to the scraping member 221.

[0051] In this embodiment: During the filtration operation, due to the high viscosity of the flocculants, the flocculants will block the inner filter holes 203 and the outer filter holes 224 after long-term use. In order to further improve the filtration efficiency, the scraping member 221 is designed.

[0052] Refer to the attached Figure 10 - attached Figure 12 The scraping member 221 includes two parts, an inner ring 222 and an outer ring 223. The inner ring 222 abuts against the inner wall of the shunt pipe 202; the outer ring 223 is composed of two parts, a lower scraping part 225 and an upper scraping part 226. The lower scraping part 225 abuts against the inner wall of the moving filter screen 213, and the upper scraping part 226 abuts against the inner wall of the arc plate 210.

[0053] In this embodiment: Driven by the cleaning cylinder 220, when the inner ring 222 reciprocates along the shunt pipe 202, the inner ring 222 can reciprocally scrape the inner filter holes 203 on the shunt pipe 202. When the outer ring 223 reciprocates along the arc plate 210, the outer ring 223 can reciprocally scrape the inner wall of the arc plate 210 and the outer filter holes 224 on the moving filter screen 213. Since the diameters of the arc plate 210 and the moving filter screen 213 are different, in order to maintain a good degree of fit, the outer ring 223 is composed of a lower scraping part 225 and an upper scraping part 226.

[0054] Working principle of the present invention: When the device is working, first, a flocculant is sprayed into the flocculation tank 101 through the pressure pump 119 and the spray pipe 122. When the swing motors 109 on both sides drive the swing arms 110 to rotate, the lifting seat 113 reciprocally swings and reciprocally moves up and down along the slide rod 108, so as to perform spraying operations on different depths in the vertical direction and different angles in the horizontal direction of the water body. After flocculation is completed, the clarified water on the upper layer is discharged through the annular groove 104 and the water outlet pipe 106 and enters the next treatment process. The bottom water containing a large amount of flocs at the bottom of the flocculation tank 101 falls into the shunt bin 201 and the shunt pipe 202 through the discharge pipe 102. When it is necessary to filter the bottom water multiple times, the adjustment motor 216 is started and the moving filter screen 213 is driven to rotate. When the moving filter screen 213 completely closes the bottom of the arc plate 210, at this time, the bottom water sequentially passes through the inner filter holes 203 and the outer filter holes 224 to complete double filtration. When only single filtration is required, the adjustment motor 216 is started and the moving filter screen 213 is driven to retract into the storage cavity 211, and at this time, the bottom of the arc plate 210 is completely exposed. After the filtration is completed, some flocs will remain inside the moving filter screen 213 and the shunt pipe 202. When it is necessary to clean the moving filter screen 213, the adjustment motor 216 is started and the moving filter screen 213 is driven to rotate a certain angle into the storage cavity 211, so as to expose the inner wall of the moving filter screen 213. When it is necessary to clean the shunt pipe 202, the discharge pipe 205 can be opened.

[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and creative features disclosed herein.

Claims

1. A coagulation and sedimentation pretreatment device, comprising a flocculation mechanism (1) and a filtration mechanism (2), characterized in that: The flocculation mechanism (1) comprises a flocculation tank (101), a sliding rod (108) is fixedly arranged in the middle of the flocculation tank (101), and a lifting seat (113) is slidably arranged on the sliding rod (108) for reciprocating motion; a symmetrical swing motor (109) is installed on the outer wall of the flocculation tank (101), and the output end of the swing motor (109) is provided with a swing arm (110) that cooperates with each other, and linkage arms (114) are arranged on both sides of the lifting seat (113), and the linkage arms (114) are movably connected to the swing arms (110); The top of the flocculation tank (101) is provided with an annular groove (104), and the top of the flocculation tank (101) is provided with a plurality of drainage grooves (105); the top of the lifting seat (113) is provided with a plurality of connecting arms (115), and the connecting arms (115) are provided with an annular scraping ring (116); when the lifting seat (113) swings and reciprocates up and down along the sliding rod (108), the scraping ring (116) scrapes and cleans the drainage grooves (105); A plurality of groups of dosing cantilevers (121) are arranged at intervals on the outer wall of the lifting seat (113), and a plurality of groups of nozzles (122) are arranged on the dosing cantilevers (121); The filtering mechanism (2) comprises a flow diversion chamber (201) located below the flocculation tank (101), symmetrical flow diversion pipes (202) are arranged on both sides of the flow diversion chamber (201), and a plurality of groups of inner filter holes (203) are provided at the ends of the flow diversion pipes (202); a support frame (207) is also installed on the flow diversion pipe (202), an arc plate (210) coaxially arranged with the flow diversion pipe (202) is fixedly arranged on the outer side of the support frame (207), a baffle (209) cooperating with the end of the flow diversion pipe (202) is fixedly arranged on the outer side of the arc plate (210), a storage chamber (211) is provided inside the arc plate (210), a moving filter screen (213) is rotatably arranged inside the storage chamber (211), and an outer filter hole (224) having a diameter smaller than that of the inner filter hole (203) is provided on the moving filter screen (213); A spherical cavity (111) is provided inside the swing arm (110), and a ball seat (112) is installed inside the spherical cavity (111).

2. The coagulation sedimentation pretreatment device according to claim 1 is characterized in that: A mounting frame (117) is provided on the outer wall of the flocculation tank (101), a drug storage cylinder (118) is provided on the mounting frame (117), a pressure pump (119) is installed at the discharge port of the drug storage cylinder (118), and the pressure pump (119) is connected to the lifting seat (113) via a hose (120).

3. The coagulation sedimentation pretreatment device according to claim 1 is characterized in that: The linkage arm (114) passes through the ball seat (112) and is movably connected thereto.

4. The coagulation sedimentation pretreatment device according to any one of claims 1 to 3, characterized in that: A discharge pipe (102) located above the diversion chamber (201) is arranged at the bottom of the flocculation tank (101), and a valve 1 (103) is installed on the discharge pipe (102); a water outlet pipe (106) is arranged at the bottom of the annular groove (104), and a control panel (107) is also arranged on the outer wall of the flocculation tank (101).

5. The coagulation sedimentation pretreatment device according to any one of claims 1 to 3, characterized in that: The support frame (207) is provided with an inner cavity (208) that cooperates with the diverter pipe (202), and the baffle plate (209) is provided with an outer cavity (215) that cooperates with the end of the diverter pipe (202); a discharge pipe (205) is also provided at the end of the diverter pipe (202), and a second valve (206) is installed on the discharge pipe (205).

6. The coagulation sedimentation pretreatment device according to any one of claims 1 to 3, characterized in that: The support frame (207) is provided with a rotation groove (212) which is in communication with the storage chamber (211); a gear ring (214) is fixedly connected to one side of the motion filter (213); the motion filter (213) is rotatably arranged on the support frame (207) via the gear ring (214); an adjustment motor (216) is also installed on the support frame (207); a driving gear (217) meshing with the gear ring (214) is installed at the output end of the adjustment motor (216).

7. The coagulation sedimentation pretreatment device according to any one of claims 1 to 3, characterized in that: A sealing track (218) is fixedly provided on the outer side of the moving filter (213), and a sealing groove (219) cooperating with the sealing track is provided on the inner wall of the baffle (209).

8. The coagulation sedimentation pretreatment device according to claim 1, characterized in that: A sliding seat (204) is provided on the top of the flow dividing pipe (202) and penetrates therethrough. A scraper (221) is slidably arranged on the sliding seat (204). A cleaning cylinder (220) is also mounted on the support frame (207). The output end of the cleaning cylinder (220) is fixedly connected to the scraper (221).

9. The coagulation sedimentation pretreatment device according to claim 8, characterized in that: The scraper (221) comprises two parts, an inner ring (222) and an outer ring (223); the inner ring (222) abuts against the inner wall of the diverter pipe (202); the outer ring (223) comprises two parts, a lower scraper part (225) and an upper scraper part (226); the lower scraper part (225) abuts against the inner wall of the moving filter (213), and the upper scraper part (226) abuts against the inner wall of the arc plate (210).

10. The dynamic control method of the coagulation sedimentation pretreatment device according to any one of claims 1 to 9, characterized in that: S1. Adding flocculant into the flocculation tank (101) through multiple groups of dosing cantilevers (121) and nozzles (122) on the lifting seat (113), and swinging synchronously when the lifting seat (113) reciprocates up and down along the slide bar (108); S2. Impurities in the water of the flocculation tank (101) react with the flocculant to form flocs which accumulate at the bottom of the flocculation tank (101), and the clarified water on the upper layer is discharged through the annular groove (104); S3. The bottom water containing a large amount of flocs enters the diversion chamber (201) and the diversion pipe (202) through the discharge pipe (102); S4. When the bottom water needs to be filtered multiple times, the regulating motor (216) is started and the moving filter (213) is driven to rotate. At this time, the bottom water passes through the inner filter hole (203) and the outer filter hole (224) in turn to complete double filtration; S5. When only a single filtration is required, the regulating motor (216) is started and the moving filter (213) is driven to retract into the storage chamber (211). At this time, the bottom water is filtered once through the inner filter hole (203).

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