Precipitation device for producing polyaluminum chloride

Abstract

The invention provides a precipitation device for polyaluminum chloride production, and relates to the technical field of sewage treatment.The precipitation device comprises a concentration box, three mixing boxes are arranged at the top of the concentration box, water inlet pipes are arranged at the tops of the mixing boxes, the lower ends of the water inlet pipes are closed, and connecting assemblies are arranged between the water inlet pipes and the mixing boxes and comprise top plates; compared with the prior art, the device has the advantages that the water inlet pipe is connected with the three mixing boxes, and wastewater fed by the water inlet pipe is fed into the different mixing boxes in batches to be mixed with a quantitative coagulant through cooperation of the connecting assembly and the driving assembly; feeding of the next group of mixing boxes can be performed while reaction time is given, the total waiting time is shortened, the screening assembly and the driving assembly are matched to facilitate separation of wastewater and precipitates, the blockage problem is avoided, the precipitates are convenient to clean, and the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a precipitation device for producing polyaluminium chloride. Background Art

[0002] Polyaluminium chloride (PAC) turns into solid precipitate through a series of chemical reactions and physical changes. After polyaluminium chloride is dissolved in water, its cations will react with impurities in the water to form condensates, which settle down by gravity and eventually form solid precipitates. The structure of the sedimentation device for wastewater treatment usually includes an inlet pipe, a reaction tank, an agitator, a dosing device, an outlet pipe and a sedimentation tank. The inlet pipe introduces the water to be treated into the reaction tank, the agitator is used to evenly add the coagulant to the water and mix it, and the dosing device controls the amount of coagulant added to ensure the coagulation effect. After a certain period of reaction and stirring, the water flows into the sedimentation tank for precipitation and then is discharged through the outlet pipe.

[0003] Generally, when treating wastewater, it is necessary to add corresponding coagulants to the wastewater to remove harmful substances in the wastewater through the reaction between the coagulant and the wastewater. This method requires waiting for the formation of precipitation and then using filtering equipment to remove the precipitation, which affects the progress of wastewater treatment. In the process of removing precipitation, the blockage of the filtering device will also cause the sewage treatment efficiency to decrease. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a precipitation device for the production of polyaluminium chloride to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. A water inlet pipe is connected to three mixing boxes. By utilizing the cooperation of a connecting component and a driving component, the wastewater sent into the water inlet pipe is sent into different mixing boxes in batches to be mixed with a quantitative coagulant. While giving reaction time, the next group of mixing boxes can be put in, thereby reducing the overall waiting time. The cooperation of a screening component and a driving component can facilitate the separation of wastewater and precipitation, avoid blockage problems, facilitate the cleaning of sediments, and improve the efficiency of wastewater treatment.

[0005] In order to achieve the above-mentioned object, the present invention is realized by the following technical scheme: a precipitation device for the production of polyaluminium chloride, comprising a concentration box, three groups of mixing boxes are arranged on the top of the concentration box, and a water inlet pipe is arranged on the top of the mixing box, the lower end of the water inlet pipe is closed, a connecting assembly is arranged between the water inlet pipe and the mixing box, the connecting assembly comprises a top plate, the top plate is rotatably sleeved on the periphery of the water inlet pipe, and a bottom box is arranged at the bottom of the top plate, the bottom box is fixed on the top of the three groups of mixing boxes, three connecting ports are opened inside the bottom box, and the connecting ports are communicated with the corresponding mixing boxes, and the top of the bottom box corresponds to The three connecting ports are provided with lower connecting pipes, the top plate is slidably mounted with an upper connecting pipe at the bottom corresponding to the lower connecting pipe, and a bellows is fixed between the upper connecting pipe and the lower connecting pipe, a screening assembly is installed at the bottom outlet of the mixing box, the screening assembly includes an inclined pipe, connecting pipes are rotatably mounted at both ends of the inclined pipe through bearings, and the connecting pipes are respectively connected to the bottom of the mixing box and the top of the concentrating box, a screening box is installed at the middle position of the inclined pipe, a driving assembly is provided at the center position of the three groups of mixing boxes, the driving assembly includes a shaft rod, the top of the shaft rod passes through the bottom box and is rotatably connected to the bottom of the water inlet pipe.

[0006] Furthermore, a sewage discharge channel is provided at the center of the central box, and a discharge pipe is provided on one side of the central box, and a solenoid valve is installed between the mixing box and the connecting pipe at the top of the inclined tube.

[0007] Furthermore, the connecting assembly also includes a connecting ring, the inner rings of the three groups of upper connecting tubes and the three groups of lower connecting tubes are fixed with connecting rings, and the connecting rings of the lower connecting tubes are rotatably sleeved on the shaft rod through bearings, a screw is rotatably installed on the surface of the connecting ring of the lower connecting tube, and the connecting ring of the upper connecting tube is threadedly sleeved on the surface of the screw.

[0008] Furthermore, a bottom plate is rotatably installed on the top of the bottom box, and the bottom plate is fixedly sleeved on the shaft rod. A notch is provided on the surface of the bottom plate at a position corresponding to a connecting port. A delivery device is fixed on the top of the top plate, and the outlet end of the delivery device is connected to an upper connecting pipe adjacent to the notch of the bottom plate. The outer side of the top plate is connected to the bottom plate through a telescopic plate.

[0009] Furthermore, the driving assembly also includes a motor, a motor is fixed on the top of the sewage discharge channel, and the output end of the motor is fixedly connected to the shaft, a first gear ring is fixed to the outer ring of the bottom plate, a stirring frame is rotatably installed inside the mixing box through a bearing, and a first gear is fixed on the top of the stirring frame passing through the mixing box, and the first gear is meshingly connected to the first gear ring.

[0010] Furthermore, a second gear ring is rotatably mounted at a position on the bottom of the mixing box corresponding to the top of the inclined tube through a bearing, a second gear is fixed on the surface of the shaft corresponding to the second gear ring, and the second gear is meshingly connected with the second gear ring.

[0011] Furthermore, a telescopic rod is rotatably mounted on the bottom of the second gear ring via a universal shaft, and the other end of the telescopic rod is rotatably connected to one side of the top of the inclined tube via the universal shaft.

[0012] Furthermore, the screening assembly also includes a box door, the box door is sealedly installed on the outer surface of the screening box, and a sieve plate is arranged inside the screening box.

[0013] Furthermore, the water inlet pipe is fixed with a connecting layer at the bottom of the top plate, and a sealing block is rotatably installed inside the connecting layer. A connecting groove is opened on the surface of the sealing block. The inner side of the upper connecting pipe is connected with the connecting layer, and the inner side of the connecting layer corresponding to the water inlet pipe is hollowed out.

[0014] Furthermore, a rotating plate is fixed on the top of the sealing block, and the top of the rotating plate is fixedly connected to the top plate.

[0015] Beneficial effects of the present invention: 1. When the shaft rotates, the bottom plate and the first gear ring rotate synchronously, and the first gear on the top of the stirring frame is meshed and connected with the first gear ring, thereby driving the stirring frame to rotate inside the mixing box, thereby accelerating the mixing efficiency of the wastewater and the coagulant.

[0016] 2. In the present invention, after the wastewater in the mixing box is precipitated, it is sent into the inner wall of the inclined tube. At this time, the shaft rod drives the second gear to rotate and mesh with the second gear ring at the bottom of the mixing box. The second gear ring drives the rotation of the telescopic rod. In order to avoid rotation interference, the second gear ring is arranged on the outside of the connecting tube, and the universal shafts at both ends of the telescopic rod can drive the inclined tube to rotate along the inclined axis. In the inclined state, the sediment in the screening box is always kept close to the bottom, thereby avoiding accumulation on the surface of the screen plate.

[0017] 3. The upper connecting pipe and the lower connecting pipe of the present invention are channels for storing polyaluminium chloride, which are installed on the shaft through two connecting rings and a screw on the inner side, wherein the top of the upper connecting pipe contacts the top plate, and the bottom of the lower connecting pipe contacts the bottom plate. A delivery device is installed on the top plate for storing and delivering polyaluminium chloride, and a notch is provided on the bottom plate for convenient delivery of wastewater into the bottom box. By rotating the screw, the upper connecting pipe moves vertically through the movement of the connecting ring, and the corrugated pipe can maintain the connectivity between the upper connecting pipe and the lower connecting pipe while the upper connecting pipe moves. Changing the distance between the upper connecting pipe and the lower connecting pipe can adjust the space for storing polyaluminium chloride inside, thereby quantitatively delivering polyaluminium chloride before each wastewater treatment to avoid waste and excess.

[0018] 4. Compared with the prior art, the present invention has a water inlet pipe connected to three mixing boxes. The wastewater sent into the water inlet pipe is sent into different mixing boxes in batches and mixed with a certain amount of coagulant by the cooperation of the connecting component and the driving component. While giving reaction time, the next group of mixing boxes can be put in, reducing the overall waiting time. The cooperation of the screening component and the driving component can facilitate the separation of wastewater and sediment, avoid blockage problems, facilitate the cleaning of sediment, and improve the efficiency of wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a precipitation device for producing polyaluminium chloride according to the present invention; Figure 2 This is a schematic diagram of the connection between a mixing box and a centralizing box of a precipitation device for producing polyaluminium chloride according to the present invention; Figure 3 This is a schematic diagram of the structure of the connection components of a precipitation device for producing polyaluminium chloride according to the present invention; Figure 4 This is a schematic diagram of the connection between a connection component and a driving component of a precipitation device for producing polyaluminium chloride according to the present invention; Figure 5 This is a schematic diagram of the separation of a water inlet pipe and a connecting assembly of a precipitation device for producing polyaluminium chloride according to the present invention; Figure 6 This is a schematic diagram of the structure of a screening component of a precipitation device for producing polyaluminium chloride according to the present invention; Figure 7 The present invention is a schematic diagram of the connection between a connection assembly and a mixing box of a precipitation device for producing polyaluminium chloride.

[0020] In the figure: 1. concentration box; 11. discharge pipe; 12. sewage discharge channel; 2. mixing box; 21. stirring frame; 3. water inlet pipe; 31. connecting layer; 32. rotating plate; 33. connecting groove; 34. sealing block; 4. connecting assembly; 41. top plate; 42. upper connecting pipe; 43. bellows; 44. lower connecting pipe; 45. connecting ring; 46. screw; 47. delivery device; 48. bottom plate; 49. bottom box; 410. connecting port; 5. driving assembly; 51. shaft; 52. first gear ring; 53. first gear; 54. motor; 55. second gear; 56. second gear ring; 57. telescopic rod; 6. screening assembly; 61. inclined pipe; 62. connecting pipe; 63. screening box; 64. box door. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] See also Figures 1 to 7The present invention provides a technical solution: a precipitation device for producing polyaluminium chloride, comprising a concentration box 1, wherein three groups of mixing boxes 2 are arranged on the top of the concentration box 1, and a water inlet pipe 3 is arranged on the top of the mixing box 2, the lower end of the water inlet pipe 3 is closed, and a connecting assembly 4 is arranged between the water inlet pipe 3 and the mixing box 2, wherein the connecting assembly 4 comprises a top plate 41, wherein the top plate 41 is rotatably sleeved on the periphery of the water inlet pipe 3, and a bottom box 49 is arranged at the bottom of the top plate 41, wherein the bottom box 49 is fixed on the top of the three groups of mixing boxes 2, wherein three connecting ports 410 are opened inside the bottom box 49, and the connecting ports 410 are communicated with the corresponding mixing boxes 2, wherein a lower connecting pipe 44 is arranged at the position of the top of the bottom box 49 corresponding to the three connecting ports 410, an upper connecting pipe 42 is slidably installed on the top plate 41 corresponding to the bottom of the lower connecting pipe 44, and a corrugated pipe 4 is fixed between the upper connecting pipe 42 and the lower connecting pipe 44. 3. A screening component 6 is installed at the bottom outlet end of the mixing box 2. The screening component 6 includes an inclined tube 61. Connecting tubes 62 are rotatably installed at both ends of the inclined tube 61 through bearings, and the connecting tubes 62 are respectively connected to the bottom of the mixing box 2 and the top of the central box 1. A screening box 63 is installed in the middle position of the inclined tube 61. A driving component 5 is provided at the center position of the three groups of mixing boxes 2. The driving component 5 includes an axle 51. The top of the axle 51 passes through the bottom box 49 and is rotatably connected to the bottom of the water inlet pipe 3. When in use, wastewater is sent into the mixing box 2 through the water inlet pipe 3 and the connecting component 4, reacts with polyaluminium chloride to produce precipitation, and the wastewater is separated from the precipitation by the screening component 6 and sent to the central box 1. Through the cooperation of the driving component 5 and the connecting component 4, the wastewater is sent into different mixing boxes 2 in batches, thereby reducing the intermediate waiting time and improving the overall processing efficiency.

[0023] In this embodiment, a sewage channel 12 is opened at the center position of the concentration box 1, and a discharge pipe 11 is provided on one side of the concentration box 1. A solenoid valve is installed between the mixing box 2 and the connecting pipe 62 at the top of the inclined tube 61. The screening component 6 also includes a box door 64. The box door 64 is sealed on the outer surface of the screening box 63, and a sieve plate is provided inside the screening box 63. The box door 64 on the side of the screening box 63 can be opened manually. After the box door 64 is opened in the stage where no treatment is performed, the sediment is cleaned into the sewage channel 12. When the wastewater is in the flocculation stage, the solenoid valve in the connecting pipe 62 is closed.

[0024] In this embodiment, the connecting assembly 4 also includes a connecting ring 45, and the inner rings of the three groups of upper connecting tubes 42 and the three groups of lower connecting tubes 44 are fixed with connecting rings 45, and the connecting rings 45 of the lower connecting tubes 44 are rotatably sleeved on the shaft 51 through bearings, and a screw 46 is rotatably installed on the surface of the connecting ring 45 of the lower connecting tube 44, and the connecting ring 45 of the upper connecting tube 42 is threadedly sleeved on the surface of the screw 46, and a bottom plate 48 is rotatably installed on the top of the bottom box 49, and the bottom plate 48 is fixedly sleeved on the shaft 51, and a notch is opened on the surface of the bottom plate 48 corresponding to a connection port 410, and a delivery device 47 is fixed on the top of the top plate 41, and the outlet end of the delivery device 47 is communicated with the upper connecting tube 42 adjacent to the notch of the bottom plate 48, and the top The outer side of the plate 41 is connected to the bottom plate 48 through a telescopic plate. The water inlet pipe 3 is located at the bottom of the top plate 41 and is fixed with a connecting layer 31, and a sealing block 34 is rotatably installed inside the connecting layer 31. A connecting groove 33 is opened on the surface of the sealing block 34. The inner side of the upper connecting pipe 42 is connected to the connecting layer 31. The inner side of the water inlet pipe 3 corresponds to the hollowing of the inner side of the connecting layer 31. A rotating plate 32 is fixed on the top of the sealing block 34, and the top of the rotating plate 32 is fixedly connected to the top plate 41. The upper connecting pipe 42 and the lower connecting pipe 44 are channels for storing polyaluminium chloride, and are installed on the shaft 51 through two connecting rings 45 and a screw 46 on the inner side. The top of the upper connecting pipe 42 contacts with the top plate 41, and the bottom of the lower connecting pipe 44 contacts with the bottom plate 48. Because the top plate 41 is installed A delivery device 47 is provided for storing and delivering polyaluminium chloride. A notch is provided on the bottom plate 48 to facilitate delivery of wastewater into the bottom box 49. By rotating the screw 46, the upper connecting pipe 42 moves vertically through the movement of the connecting ring 45. The bellows 43 can maintain the connectivity between the upper connecting pipe 42 and the lower connecting pipe 44 while the upper connecting pipe 42 moves. By changing the distance between the upper connecting pipe 42 and the lower connecting pipe 44, the space for storing polyaluminium chloride inside can be adjusted, thereby quantitatively delivering polyaluminium chloride before each wastewater treatment to avoid waste and excess. The adjustment process can be manually adjusted. After each adjustment, the top plate 41 is moved to always cover the top of the upper connecting pipe 42, and the outlet end of the delivery device 47 corresponds to a group of upper connecting pipes 42. , and because the water inlet pipe 3 is a side opening, the wastewater enters the connecting groove 33 of the sealing block 34. As the shaft 51 drives the bottom plate 48 and the top plate 41 to rotate, the rotating plate 32 and the sealing block 34 are also driven to rotate, and the connecting groove 33 corresponds to different upper connecting pipes 42. The overall principle of this process is that the wastewater sent by the water inlet pipe 3 enters the inside of the connecting layer 31 through the opening on the bottom side. At this time, the remaining positions of the sealing block 34 correspond to the opening of the water inlet pipe 3. The connecting groove 33 is connected with a group of upper connecting pipes 42 equipped with polyaluminium chloride. At this time, the lower connecting pipe 44 at the bottom of the upper connecting pipe 42 also corresponds to the notch of the bottom plate 48 and the connecting port 410 in the bottom box 49. The wastewater is connected with the polyaluminium chloride and enters the corresponding mixing box 2 for stirring.The other mixing box 2 can wait for the precipitation to occur and the dosing device 47 can add polyaluminium chloride into the connecting pipe, thereby treating the wastewater in batches to reduce the time required for treating the wastewater.

[0025] In this embodiment, the driving assembly 5 also includes a motor 54, a motor 54 is fixed on the top of the sewage discharge channel 12, and the output end of the motor 54 is fixedly connected to the shaft 51, a first gear ring 52 is fixed to the outer ring of the bottom plate 48, a stirring frame 21 is rotatably installed inside the mixing box 2 through a bearing, and a first gear 53 is fixed on the top of the stirring frame 21 passing through the mixing box 2, the first gear 53 is meshingly connected with the first gear ring 52, a second gear ring 56 is rotatably installed at the position of the bottom of the mixing box 2 corresponding to the top of the inclined tube 61 through a bearing, a second gear 55 is fixed on the surface of the shaft 51 at a position corresponding to the second gear ring 56, and the second gear 55 is meshingly connected with the second gear ring 56, a telescopic rod 57 is rotatably installed at the bottom of the second gear ring 56 through a universal shaft, and the other end of the telescopic rod 57 is rotatably connected to one side of the top of the inclined tube 61 through a universal shaft, the motor 54 drives the shaft 51 to rotate, and the bottom plate 48 rotates along the top of the bottom box 49, so that the notch position corresponds to the notch. At the bottom of the lower connecting pipe 44, wastewater and coagulant are sent into different mixing boxes 2. When the shaft 51 rotates, the bottom plate 48 rotates synchronously with the first gear ring 52, and the first gear 53 at the top of the stirring frame 21 is meshed and connected with the first gear ring 52, thereby driving the stirring frame 21 to rotate inside the mixing box 2 to accelerate the mixing efficiency of the wastewater and the coagulant. In this process, a heating device can be set inside the mixing box 2 to adjust the temperature to a suitable temperature for the polyaluminium chloride reaction. After the wastewater in the mixing box 2 is precipitated, it is sent to the inner wall of the inclined tube 61. At this time, the shaft 51 drives the second gear 55 to rotate and mesh with the second gear ring 56 at the bottom of the mixing box 2. The second gear ring 56 drives the rotation of the telescopic rod 57. To avoid rotation interference, the second gear ring 56 is arranged on the outside of the connecting pipe 62, and the universal shafts at both ends of the telescopic rod 57 can drive the inclined tube 61 to rotate along the inclined axis. In the inclined state, the precipitation in the screening box 63 is always kept close to the bottom, thereby avoiding accumulation on the surface of the screen plate.

[0026] When in use, the wastewater sent in by the water inlet pipe 3 enters the interior of the connecting layer 31 through the opening on the bottom side. At this time, the remaining positions of the sealing block 34 correspond to the opening of the water inlet pipe 3, and the connecting groove 33 is connected with a group of upper connecting pipes 42 equipped with polyaluminium chloride. At this time, the lower connecting pipe 44 at the bottom of the upper connecting pipe 42 also corresponds to the notch of the bottom plate 48 and the connecting port 410 in the bottom box 49. The wastewater is connected with polyaluminium chloride to enter the corresponding mixing box 2 for stirring, while the other mixing box 2 can wait for precipitation and the feeding device 47 can add polyaluminium chloride to the inside of the connecting pipe, so as to treat the wastewater in batches to reduce the time required for treating the wastewater. The motor 54 drives the shaft 51 to rotate, and the bottom plate 48 rotates along the top of the bottom box 49, and the notch position corresponds to the bottom of the different lower connecting pipes 44, so that the wastewater and coagulant are sent into different mixing boxes 2. When the shaft 51 rotates, the bottom plate 48 rotates synchronously with the first gear ring 52, and the stirring frame 2 The first gear 53 at the top is meshed and connected with the first gear ring 52, thereby driving the stirring frame 21 to rotate inside the mixing box 2 to accelerate the mixing efficiency of the wastewater and the coagulant. In this process, a heating device can be set inside the mixing box 2 to adjust the temperature to a suitable temperature for the polyaluminium chloride reaction. After the wastewater in the mixing box 2 is precipitated, it is sent to the inner wall of the inclined tube 61. At this time, the shaft 51 drives the second gear 55 to rotate and mesh with the second gear ring 56 at the bottom of the mixing box 2. The second gear ring 56 drives the rotation of the telescopic rod 57. To avoid rotation interference, the second gear ring 56 is set on the outside of the connecting tube 62, and the universal shafts at both ends of the telescopic rod 57 can drive the inclined tube 61 to rotate along the inclined axis. In the inclined state, the sediment in the screening box 63 is always kept near the bottom, thereby avoiding accumulation on the surface of the sieve plate. The box door 64 on the side of the screening box 63 can be opened manually. When the box door 64 is opened at the stage where no treatment is performed, the sediment is cleaned into the sewage channel 12.

[0027] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A precipitation device for producing polyaluminium chloride, comprising a concentration tank (1), characterized in that: Three groups of mixing boxes (2) are arranged on the top of the central box (1), and a water inlet pipe (3) is arranged on the top of the mixing box (2). The lower end of the water inlet pipe (3) is closed. A connecting assembly (4) is arranged between the water inlet pipe (3) and the mixing box (2). The connecting assembly (4) comprises a top plate (41). The top plate (41) is rotatably sleeved on the outer periphery of the water inlet pipe (3). A bottom box (49) is arranged at the bottom of the top plate (41). The bottom box (49) is fixed on the top of the three groups of mixing boxes (2). Three connecting ports (410) are opened inside the bottom box (49), and the connecting ports (410) are communicated with the corresponding mixing boxes (2). Lower connecting pipes (44) are arranged at positions on the top of the bottom box (49) corresponding to the three connecting ports (410). The top plate (41) corresponds to An upper connecting pipe (42) is slidably mounted on the bottom of the lower connecting pipe (44), and a bellows (43) is fixed between the upper connecting pipe (42) and the lower connecting pipe (44). A screening assembly (6) is mounted on the bottom outlet of the mixing box (2). The screening assembly (6) comprises an inclined pipe (61). Connecting pipes (62) are rotatably mounted on both ends of the inclined pipe (61) through bearings. The connecting pipes (62) are respectively connected to the bottom of the mixing box (2) and the top of the concentration box (1). A screening box (63) is mounted in the middle of the inclined pipe (61). A driving assembly (5) is provided at the center of the three groups of mixing boxes (2). The driving assembly (5) comprises a shaft rod (51). The top of the shaft rod (51) passes through the bottom box (49) and is rotatably connected to the bottom of the water inlet pipe (3).

2. A precipitation device for producing polyaluminium chloride according to claim 1, characterized in that: A sewage discharge passage (12) is provided at the center of the central box (1), and a discharge pipe (11) is provided on one side of the central box (1). A solenoid valve is installed between the mixing box (2) and the connecting pipe (62) at the top of the inclined tube (61).

3. A precipitation device for producing polyaluminium chloride according to claim 2, characterized in that: The connection assembly (4) further comprises a connection ring (45), the inner rings of the three groups of upper connection tubes (42) and the three groups of lower connection tubes (44) are fixed with connection rings (45), and the connection rings (45) of the lower connection tubes (44) are rotatably sleeved on the shaft (51) via bearings, a screw rod (46) is rotatably mounted on the surface of the connection ring (45) of the lower connection tube (44), and the connection ring (45) of the upper connection tube (42) is threadedly sleeved on the surface of the screw rod (46).

4. A precipitation device for producing polyaluminium chloride according to claim 3, characterized in that: A bottom plate (48) is rotatably mounted on the top of the bottom box (49), and the bottom plate (48) is fixedly sleeved on the shaft (51). A notch is provided on the surface of the bottom plate (48) at a position corresponding to a connection port (410). A delivery device (47) is fixed on the top of the top plate (41), and an outlet end of the delivery device (47) is communicated with an upper connection pipe (42) adjacent to the notch of the bottom plate (48). The outer side of the top plate (41) is connected to the bottom plate (48) via a telescopic plate.

5. A precipitation device for producing polyaluminium chloride according to claim 4, characterized in that: The driving assembly (5) further comprises a motor (54), the motor (54) being fixed to the top of the sewage discharge channel (12), and the output end of the motor (54) being fixedly connected to the shaft (51), the outer ring of the bottom plate (48) being fixed with a first gear ring (52), the mixing box (2) having a stirring frame (21) being rotatably mounted therein via a bearing, and a first gear (53) being fixed to the top of the stirring frame (21) passing through the mixing box (2), the first gear (53) being meshingly connected with the first gear ring (52).

6. A precipitation device for producing polyaluminium chloride according to claim 5, characterized in that: A second gear ring (56) is rotatably mounted on the bottom of the mixing box (2) at a position corresponding to the top of the inclined tube (61) via a bearing, and a second gear (55) is fixed on the surface of the shaft rod (51) at a position corresponding to the second gear ring (56), and the second gear (55) is meshingly connected with the second gear ring (56).

7. A precipitation device for producing polyaluminium chloride according to claim 6, characterized in that: A telescopic rod (57) is rotatably mounted on the bottom of the second gear ring (56) via a universal shaft, and the other end of the telescopic rod (57) is rotatably connected to one side of the top of the inclined tube (61) via the universal shaft.

8. A precipitation device for producing polyaluminium chloride according to claim 1, characterized in that: The screening assembly (6) further comprises a box door (64), the box door (64) being sealingly mounted on the outer surface of the screening box (63), and a screen plate being arranged inside the screening box (63).

9. A precipitation device for producing polyaluminium chloride according to claim 1, characterized in that: The water inlet pipe (3) is located at the bottom of the top plate (41) and is fixed with a connecting layer (31), and a sealing block (34) is rotatably mounted inside the connecting layer (31), a connecting groove (33) is provided on the surface of the sealing block (34), the inner side of the upper connecting pipe (42) is connected to the connecting layer (31), and the inner side of the water inlet pipe (3) corresponding to the connecting layer (31) is hollowed out.

10. A precipitation device for producing polyaluminium chloride according to claim 9, characterized in that: A rotating plate (32) is fixed on the top of the sealing block (34), and the top of the rotating plate (32) is fixedly connected to the top plate (41).

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