Coagulating precipitation pretreatment device and dynamic control method

Abstract

The invention discloses a coagulating sedimentation pretreatment device and a dynamic control method, and belongs to the technical field of water treatment.The coagulating sedimentation pretreatment device is characterized in that a reciprocating lifting seat is arranged on a sliding rod in a sliding mode, swing arms matched with each other are arranged at the output end of a swing motor, linkage arms are arranged on the two sides of the lifting seat, and the linkage arms are movably connected with the swing arms; a plurality of groups of connecting arms are fixedly arranged at the top of the lifting seat, and annular scraping rings are fixedly arranged on the connecting arms; a plurality of groups of inner filter holes are formed in the tail end of the flow dividing pipe, an arc plate coaxial with the flow dividing pipe is fixedly arranged on the outer side of the supporting frame, a baffle is fixedly arranged on the outer side of the arc plate, a movable filter screen is rotationally arranged in the containing cavity, and outer filter holes with the diameter smaller than that of the inner filter holes are formed in the movable filter screen. The lifting seat structure improves the motion range of the dosing cantilever and avoids dead angles, when the lifting seat swings along the sliding rod and reciprocates up and down, the scraping ring can perform rotary reciprocating scraping cleaning on the drainage groove, and the structure is stable and effective and improves the flocculation effect.

Description

Technical Field

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

[0002] At present, the turbidity of the effluent from the sedimentation tank of water treatment plants using conventional treatment processes in my country is mostly between 1 and 3 NTU, and the turbidity of the effluent from the filter tank generally does not exceed 1 NTU; the domestic conventional treatment process needs to be followed by membrane filtration for deep treatment to make the water supply turbidity reach a level not higher than 0.1 NTU. In order to ensure that the water quality meets the 106 latest national standards for drinking water quality without increasing operating costs, many water treatment technologies have been developed at home and abroad from pretreatment, strengthening of conventional processes, and deep treatment. Among them, the coagulation process is an indispensable pre-key link in the water treatment process. Its effect often determines the operating conditions, final effluent quality and cost of the subsequent process. Therefore, coagulation is one of the important research and development areas in water treatment engineering.

[0003] The patent application with publication number CN117735690A discloses a sewage coagulation treatment device, which relates to the technical field of sewage treatment devices. The application includes: a storage barrel for storing sewage, a water inlet pipe and a water outlet pipe are installed on the storage barrel, a stirring member is installed on the storage barrel, and the stirring member is used to stir the sewage in the storage barrel; a delivery member, which has two delivery members, which are installed on the storage barrel, and the delivery member is used to deliver flocculants or coagulants into the storage barrel. The application installs a stirring member and a delivery member on the storage barrel. When in use, the flocculants and coagulants are placed in different delivery members, and delivered into different cavities through the delivery members. When delivering, the opening and closing member is driven by the cooperation of the stirring member, so that the opening and closing member first unblocks 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 is added into the storage barrel.

[0004] The above-disclosed sewage coagulation treatment device has a general degree of automation and freedom. When adding flocculants to wastewater, there is a dead corner, and after the flocculation is completed, the wastewater cannot be filtered multiple times, lacking an adjustable multiple purification structure. Therefore, in view of the above situation, it is urgent to develop a coagulation sedimentation pretreatment device to overcome the shortcomings 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 existing sewage coagulation treatment device has a general degree of automation and freedom, there are dead corners when adding flocculants to wastewater, and the wastewater cannot be filtered multiple times after flocculation is completed, and there is a lack of an adjustable multiple purification structure.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a coagulation and sedimentation pretreatment device, including a flocculation mechanism and a filtering mechanism, the flocculation mechanism including a flocculation tank, a sliding rod is fixedly arranged in the middle of the flocculation tank, and a lifting seat for reciprocating motion is slidably arranged on the sliding rod; a symmetrical swinging motor is installed on the outer wall of the flocculation tank, and the output end of the swinging motor is provided with mutually cooperating swing arms, and linkage arms are arranged on both sides of the lifting seat, and the linkage arms are movably connected with the swing arms; an annular groove is arranged on the top of the flocculation tank, and a plurality of drainage grooves are opened on the top of the flocculation tank; a plurality of connecting arms are fixedly arranged on the top of the lifting seat, and an annular scraper is fixedly arranged on the connecting arm Ring; when the lifting seat swings along the slide rod and reciprocates up and down, the scraping ring scrapes and cleans the drain trough; the filtering mechanism includes a diversion bin located below the flocculation tank, symmetrical diversion pipes are arranged on both sides of the diversion bin, and multiple groups of inner filter holes are provided at the end of the diversion pipe; a support frame is also installed on the diversion pipe, and an arc plate coaxially arranged with the diversion pipe is fixedly arranged on the outer side of the support frame, and a baffle matched with the end of the diversion pipe is fixedly arranged on the outer side of the arc plate, and a storage cavity is provided inside the arc plate, and a moving filter screen is rotatably arranged in the storage cavity, and the moving filter screen is provided with outer filter holes with a diameter smaller than the inner filter holes.

[0007] As a further solution of the present invention: a plurality of groups of dosing cantilevers are arranged at intervals on the outer wall of the lifting seat, and a plurality of groups of nozzles are arranged on the dosing cantilever; a mounting frame is arranged on the outer wall of the flocculation tank, a drug storage cylinder is arranged on the mounting frame, a pressure pump is installed at the discharge port of the drug storage cylinder, and the pressure pump is connected to the lifting seat through a hose.

[0008] As a further solution 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 passes through the ball seat and is movably connected thereto.

[0009] As a further solution of the present invention: a discharge pipe located above the diversion bin is provided at the bottom of the flocculation tank, and a valve 1 is installed on the discharge pipe; a water outlet pipe is provided at the bottom of the annular groove, and a control panel is also provided on the outer wall of the flocculation tank.

[0010] As a further solution of the present invention: the support frame is provided with an inner cavity cooperating with the diverter pipe, and the baffle is provided with an outer cavity cooperating with the end of the diverter pipe; a discharge pipe is also provided at the end of the diverter pipe, and a valve 2 is installed on the discharge pipe.

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

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

[0013] As a further solution of the present invention: a sliding seat is provided on the top of the diverter pipe, a scraper is slidably provided on the sliding seat, a cleaning cylinder is also installed on the support frame, and the output end of the cleaning cylinder is fixedly connected to the scraper.

[0014] As a further solution of the present invention: the scraper includes an inner ring and an outer ring, the inner ring abuts against the inner wall of the diverter pipe; the outer ring consists of a lower scraping part and an upper scraping part, the lower scraping part abuts against the inner wall of the moving filter, and the upper scraping part abuts against the inner wall of the arc plate.

[0015] As a further solution of the present invention: the dynamic control method of the coagulation and sedimentation pretreatment device comprises: S1. adding flocculants into the flocculation tank through multiple groups of dosing cantilevers and nozzles on the lifting seat, and the lifting seat swings synchronously when it reciprocates up and down along the sliding rod; S2. impurities in the flocculation tank water react with the flocculants to generate flocs and accumulate at the bottom of the flocculation tank, and the upper clarified water is discharged through the annular groove; S3. the bottom water containing a large amount of flocs enters the diversion bin and the diversion pipe through the discharge pipe; S4. when it is necessary to filter the bottom water multiple times, start the regulating motor and drive the moving filter to rotate, at which time the bottom water passes through the inner filter hole and the outer filter hole in turn to complete double filtration; S5. when only a single filtration is required, start the regulating motor and drive the moving filter to retract into the storage chamber, at which time the bottom water passes through the inner filter hole to achieve a single filtration.

[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: 1. The present invention can add flocculants into the flocculation tank through the cooperation of the drug storage cylinder and the nozzle. When the swing motors on both sides drive the swing arms to rotate, the lifting seat swings and reciprocates up and down under the cooperation of the ball seat and the linkage arm, thereby increasing the movement range of the dosing cantilever and avoiding dead angles. When the lifting seat swings and reciprocates up and down along the slide rod, the scraping ring can scrape and clean the drainage trough to avoid a small amount of flocs clogging the drainage trough structure. The structure is stable and effective, and also improves the flocculation effect of the coagulation sedimentation pretreatment device.

[0017] 2. The present invention can filter the bottom water containing a large amount of floccules deposited at the bottom of the flocculation tank through the inner filter hole on the diversion pipe. When the bottom water needs to be filtered multiple times, the regulating motor is started and the moving filter is driven to rotate. At this time, the bottom water passes through the inner filter hole and the outer filter hole in turn to complete double filtration. When only a single filtration is required, the regulating motor is started and the moving filter is driven to retract into the storage chamber. This design improves the degree of freedom and filtration efficiency of the coagulation sedimentation pretreatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a three-dimensional structural diagram of the present invention; Figure 2 It is a partial three-dimensional structural diagram of the shunt pipe in the present invention; Figure 3 It is a three-dimensional structural diagram of the flocculation tank in the present invention; Figure 4 It is a three-dimensional internal structure diagram of the flocculation mechanism of the present invention; Figure 5 It is a three-dimensional structural diagram of the swing arm and the ball seat in the present invention; Figure 6 It is a three-dimensional structural diagram of the swing arm in the present invention; Figure 7 It is a three-dimensional structural diagram of the lifting seat in the present invention; Figure 8 It is a three-dimensional structural diagram of the moving filter screen and the arc plate in the present invention; Fig. 9 It is a three-dimensional structural diagram of the arc plate in the present invention; Fig.10 It is a three-dimensional structural diagram of the motion filter in the present invention; Fig.11 is a partial cross-sectional view of the present invention; Fig.12 It is a three-dimensional structural diagram of the scraping member in the present invention.

[0019] Description of reference numerals: 1. Flocculation mechanism; 101. Flocculation tank; 102. Drain pipe; 103. Valve 1; 104. Ring groove; 105. Drain groove; 106. Water outlet pipe; 107. Control panel; 108. Slide rod; 109. Swing motor; 110. Swing arm; 111. Spherical cavity; 112. Ball seat; 113. Lifting seat; 114. Linkage arm; 115. Connecting arm; 116. Scraping ring; 117. Mounting frame; 118. Drug storage cartridge; 119. Pressure pump; 120. Hose; 121. Dosing cantilever; 122. Spray pipe; 2. Filter mechanism; 201. Diverter bin; 202. Diverter pipe; 203. Inner filter hole; 204. Sliding seat; 205. Discharge pipe; 206. Valve 2; 207. Support frame; 208. Inner opening; 209. Baffle; 210. Arc plate; 211. Storage chamber; 212. Rotating groove; 213. Moving filter; 214. Gear ring; 215. Outer opening; 216. Adjusting motor; 217. Driving gear; 218. Sealing track; 219. Sealing groove; 220. Cleaning cylinder; 221. Scraping element; 222. Inner ring; 223. Outer ring; 224. Outer filter hole; 225. Lower scraping part; 226. Upper scraping part. DETAILED DESCRIPTION

[0020] The following will be combined with the attached Figures 1 to 12 The technical solution of the present invention is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides a coagulation sedimentation pretreatment device by improving the Figure 1-Figure 12As shown, it includes a flocculation mechanism 1 and a filtering mechanism 2. The flocculation mechanism 1 includes a flocculation tank 101. A sliding rod 108 is fixedly arranged in the middle of the flocculation tank 101, and a reciprocating lifting seat 113 is slidably arranged on the sliding rod 108; a symmetrical swing motor 109 is installed on the outer wall of the flocculation tank 101, and a swing arm 110 that cooperates with each other is arranged at the output end of the swing motor 109. Linkage arms 114 are arranged on both sides of the lifting seat 113, and the linkage arms 114 are movably connected with the swing arms 110; an annular groove 104 is arranged on the top of the flocculation tank 101, and a plurality of drainage grooves 105 are opened on the top of the flocculation tank 101; a plurality of connecting arms 115 are fixedly arranged on the top of the lifting seat 113, and an annular scraping ring 116 is fixedly arranged on the connecting arm 115; when the lifting seat 113 moves along the sliding rod When 108 swings and reciprocates up and down, the scraper ring 116 scrapes and cleans the drain trough 105; the filtering mechanism 2 includes a diversion bin 201 located below the flocculation tank 101, and symmetrical diversion pipes 202 are arranged on both sides of the diversion bin 201, and multiple groups of inner filter holes 203 are provided at the end of the diversion pipe 202; a support frame 207 is also installed on the diversion pipe 202, and an arc plate 210 coaxially arranged with the diversion pipe 202 is fixedly arranged on the outer side of the support frame 207, and a baffle 209 cooperating with the end of the diversion pipe 202 is fixedly arranged on the outer side of the arc plate 210, and a storage cavity 211 is provided inside the arc plate 210, and a moving filter screen 213 is rotatably arranged in the storage cavity 211, and an outer filter hole 224 with a diameter smaller than the inner filter hole 203 is provided on the moving filter screen 213.

[0022] In this embodiment: the coagulation sedimentation pretreatment device is mainly divided into two parts: a flocculation mechanism 1 and a filtering mechanism 2. When the device is working, the flocculant is first sprayed into the flocculation tank 101 through the pressure pump 119 and the nozzle 122. When the swing motors 109 on both sides drive the swing arms 110 to rotate, the lifting seat 113 swings back and forth along the slide bar 108 while reciprocating up and down, thereby spraying the water body at different depths in the vertical direction and different angles in the horizontal direction. After the flocculation is completed, the clarified water on the upper layer is discharged through the annular groove 104 and the outlet pipe 106 to enter the next treatment process. The bottom water containing a large amount of floccules 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 the bottom water needs to be filtered multiple times, the regulating motor 216 is started and the motion filter 213 is driven to rotate. When the motion filter 213 completely closes the bottom of the arc plate 210, the bottom water is filtered through the inner filter hole 203 and the outer filter hole 224 in turn. When only a single filtration is required, the regulating motor 216 is started and the motion filter 213 is driven to retract into the storage chamber 211, and the bottom of the arc plate 210 is completely exposed. After the filtration is completed, some flocs will remain inside the motion filter 213 and the shunt pipe 202. When the motion filter 213 needs to be cleaned, the regulating motor 216 is started and the motion filter 213 is driven to rotate a certain angle into the storage chamber 211, so that the inner wall of the motion filter 213 is exposed. When the shunt pipe 202 needs to be cleaned, the discharge pipe 205 can be opened.

[0023] See attached Figure 1 , Attachment Figure 4 and attached Figure 7 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 cantilever 121; a mounting frame 117 is arranged on the outer wall of the flocculation tank 101, and a drug storage cylinder 118 is arranged 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 through a hose 120.

[0024] In this embodiment, when the flocculant is sprayed into the flocculation tank 101 through the nozzle 122, in order to avoid dead angles and thus affect the water purification effect, a swing arm 110 structure is designed. When the swing motors 109 on both sides drive the swing arm 110 to rotate, the lifting seat 113 swings back and forth along the slide bar 108 while reciprocating up and down, thereby performing spraying operations on the water body at different depths in the vertical direction and different angles in the horizontal direction.

[0025] See attached Figure 5 -Attached Figure 6 A spherical cavity 111 is provided inside the swing arm 110 , a ball seat 112 is installed inside the spherical cavity 111 , and a linkage arm 114 passes through the ball seat 112 and is movably connected thereto.

[0026] In this embodiment, the swing motors 109 on both sides drive the swing arm 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 arm 110 can be converted into an up and down reciprocating motion of the lifting seat 113 with a swinging motion at the same time.

[0027] See attached Figure 1 and attached Figure 3 A discharge pipe 102 located above the diversion bin 201 is provided at the bottom of the flocculation tank 101 , and a 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 also provided on the outer wall of the flocculation tank 101 .

[0028] In this embodiment, in order to control the overall operation of the device, a control panel 107 is designed. In order to control the opening and closing of the drain pipe 102, thereby controlling the bottom water to enter the filtering mechanism 2 for filtering, a valve 103 is designed.

[0029] See attached Figure 1 -Attached Figure 2 The support frame 207 is provided with an inner cavity 208 which cooperates with the shunt pipe 202, and the baffle plate 209 is provided with an outer cavity 215 which cooperates with the end of the shunt pipe 202; a discharge pipe 205 is also provided at the end of the shunt pipe 202, and a valve 206 is installed on the discharge pipe 205.

[0030] 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 cleaning thereof, a discharge pipe 205 is designed.

[0031] See attached Figure 8 -Attached Fig.11 A rotating groove 212 connected to the storage chamber 211 is provided on the support frame 207, and a ring gear 214 is fixedly connected to one side of the moving filter 213. The moving filter 213 is rotatably set on the support frame 207 through the ring gear 214; an adjusting motor 216 is also installed on the support frame 207, and a driving gear 217 meshing with the ring gear 214 is installed at the output end of the adjusting motor 216.

[0032] In this embodiment: 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. When the moving filter 213 completely closes the bottom of the arc plate 210, the bottom water is filtered through the inner filter hole 203 and the outer filter hole 224 in sequence. 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 of the arc plate 210 is completely exposed. In order to ensure the rotation and smooth operation of the structure, the arc plate 210 has an arc greater than 180 degrees, the moving filter 213 has an arc of 180 degrees, and the rotating groove 212 does not penetrate the support frame 207 for 360 degrees, but is slightly less than 360 degrees.

[0033] See attached Fig. 9 -Attached Fig.10 A sealing track 218 is fixedly provided on the outer side of the moving filter 213, and a sealing groove 219 cooperating therewith is opened on the inner wall of the baffle 209.

[0034] In this embodiment, in order to further improve the sealing performance, a sealing track 218 and a sealing groove 219 that cooperate with each other are designed to improve the sealing degree of the moving filter 213 and the baffle 209.

[0035] See attached Fig.10 -Attached Fig.11 A sliding seat 204 is provided on the top of the shunt pipe 202 , and a scraper 221 is slidably provided on the sliding seat 204 . A cleaning cylinder 220 is also installed on the support frame 207 , and the output end of the cleaning cylinder 220 is fixedly connected to the scraper 221 .

[0036] In this embodiment, during the filtering operation, since the viscosity of the flocs is relatively high, the flocs will block the inner filter holes 203 and the outer filter holes 224 after long-term use. In order to further improve the filtering efficiency, a scraper 221 is designed.

[0037] See attached Fig.10 -Attached Fig.12 The scraper 221 includes 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 consists of 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.

[0038] 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 reciprocate and scrape the inner filter hole 203 on the shunt pipe 202. When the outer ring 223 reciprocates along the arc plate 210, the outer ring 223 can reciprocate and scrape the inner wall of the arc plate 210 and the outer filter hole 224 on the moving filter 213. Since the arc plate 210 and the moving filter 213 have different diameters, in order to maintain a better fit, the outer ring 223 is composed of a lower scraping part 225 and an upper scraping part 226.

[0039] Working principle of the present invention: When the device is working, the pressure pump 119 and the nozzle 122 are used to spray the flocculant into the flocculation tank 101. When the swing motors 109 on both sides drive the swing arms 110 to rotate, the lifting seat 113 swings back and forth along the slide bar 108 while reciprocating up and down, so as to spray the water at different depths in the vertical direction and different angles in the horizontal direction. After the flocculation is completed, the clarified water in the upper layer is discharged through the annular groove 104 and the outlet pipe 106 to enter the next treatment process. The bottom water containing a large amount of floccules 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 the bottom water needs to be filtered multiple times, the regulating 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, the bottom water is then filtered through the inner filter hole 203 and the outer filter hole 224 in turn. 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, and the bottom of the arc plate 210 is completely exposed. After the filtration is completed, some floccules will remain inside the moving filter 213 and the shunt pipe 202. When the moving filter 213 needs to be cleaned, the regulating motor 216 is started and the moving filter 213 is driven to rotate a certain angle into the storage chamber 211, so as to expose the inner wall of the moving filter 213. When the shunt pipe 202 needs to be cleaned, the discharge pipe 205 can be opened.

[0040] 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 apparent to those skilled in the art, and the general principles defined herein may 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 the embodiments shown herein, but will conform to the widest scope consistent with the principles and inventive 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).

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: A spherical cavity (111) is provided 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.

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 screen (213), and a sealing groove (219) cooperating with the sealing track (218) is provided on the inner wall of the baffle plate (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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