A polyaluminium chloride sewage treatment device based on urban water purification

Abstract

The invention discloses a polyaluminium chloride sewage treatment device based on urban water purification, and relates to the technical field of sewage treatment. The invention provides a polyaluminium chloride sewage treatment device based on urban water purification, which can treat sewage in sections and prolong the mixing reaction time of sewage and polyaluminium chloride. A polyaluminium chloride sewage treatment device based on urban water purification includes a tank body, the tank body is connected with an inlet pipe, the other side of the tank body away from the inlet pipe is connected with an outlet pipe, the tank body is fixedly connected with a loading box, the loading box is fixedly connected with a booster pump, the booster pump is connected with the loading box through a pipeline, the booster pump is connected with a delivery pipe, and the left side of the tank body is fixedly connected with the loading box. The three cavities formed by the treatment cylinder and the partition plate continuously contain sewage for section-by-section treatment, and the partition plate directly puts polyaluminium chloride into the sewage for coagulation, so as to prolong the coagulation reaction time of the sewage in the treatment cylinder, thereby improving the effect of sewage purification.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a polyaluminium chloride sewage treatment device based on urban water purification. Background Art

[0002] The urban water supply system consists of water sources, water pipelines, water plants and water distribution networks. Water from the water sources is transported to the water plants through water pipelines for treatment, and the treated water is transported to the city through the water distribution network. When treating water, it is generally purified through coagulation, sedimentation, filtration and disinfection.

[0003] When coagulating sewage, flocculants such as polyaluminium chloride can be used for coagulation. The pretreated sewage is introduced into the coagulant, and the coagulant puts polyaluminium chloride into the sewage to achieve the purpose of coagulation. However, the sewage in this coagulant is generally direct current, which leads to a limited mixing reaction time of polyaluminium chloride and sewage, affecting the effect of sewage coagulation and purification.

[0004] To this end, we propose a polyaluminium chloride sewage treatment device based on urban water purification that can treat sewage in sections and prolong the mixing reaction time of sewage and polyaluminium chloride to ensure the effect of coagulation purification. Summary of the invention

[0005] In order to overcome the shortcomings of existing coagulant sewage direct flow and limited mixing reaction time of polyaluminium chloride and sewage, the present invention provides a polyaluminium chloride sewage treatment device based on urban water purification, which can treat sewage in sections and prolong the mixing reaction time of sewage and polyaluminium chloride.

[0006] A polyaluminium chloride sewage treatment device based on urban water supply purification comprises a tank body, the tank body is connected with a water inlet pipe, the other side of the tank body away from the water inlet pipe is connected with a water outlet pipe, the tank body is fixedly connected with a loading box, the loading box is fixedly connected with a pressure pump, the pressure pump is connected with the loading box through a pipeline, the pressure pump is connected with a delivery pipe, and also comprises a first circular plate, the first circular plate is fixedly connected to the tank body, the tank body is fixedly connected with a second circular plate, the second circular plate is fixedly connected with a filter screen at an eccentric position, a treatment cylinder is rotatably connected between the first circular plate and the second circular plate, the treatment cylinder is fixedly connected with a partition plate, the delivery pipe passes through the tank body and the second circular plate and is connected with the partition plate, the partition plate is rotatably connected with an equidistantly distributed liquid outlet disc, the partition plate is fixedly connected with an equidistantly distributed baffle, the first circular plate is fixedly connected with a motor, the output shaft of the motor is connected with the treatment cylinder, and the first circular plate and the treatment cylinder are provided with a mixing mechanism for mixing sewage and polyaluminium chloride.

[0007] Furthermore, through holes communicating with the tank body are formed at eccentric positions of the first circular plate and the second circular plate, and the positions of the through holes are far away from each other.

[0008] Furthermore, the treatment cylinder is provided with water inlets which are equally spaced.

[0009] Furthermore, the partition plate is a hollow structure and divides the processing cylinder into a plurality of cavities of the same size.

[0010] Furthermore, the mixing mechanism includes a first gear ring, which is fixedly connected to the first circular plate, the processing cylinder is fixedly connected to a fixed frame equidistantly distributed in the circumferential direction, the fixed frame is rotatably connected to the mixing frame, the mixing frame is fixedly connected to the first gear, and the first gear is meshed with the first gear ring.

[0011] Furthermore, it also includes a quantitative mechanism for quantitatively discharging polyaluminium chloride, which is arranged on the liquid outlet plate, and includes liquid outlet pipes equidistantly distributed circumferentially, which are connected to the liquid outlet plate, and the liquid outlet pipes are slidably connected to the sliding pipes, and a first spring is connected between the sliding pipe and the adjacent liquid outlet plate, and the liquid outlet plate is fixedly connected to the blocking rods equidistantly distributed circumferentially, which are located in adjacent liquid outlet pipes and block the adjacent sliding pipes.

[0012] Furthermore, it also includes an anti-blocking mechanism for preventing the sliding tube from being blocked. The anti-blocking mechanism is arranged on the liquid outlet tray. The anti-blocking mechanism includes a second gear ring, which is fixedly connected to the liquid outlet tray. The partition plate is rotatably connected to an equidistant rotating frame, the rotating frame is fixedly connected to a second gear, the second gear is meshed with an adjacent second gear ring, the rotating frame is fixedly connected to an equidistant cleaning brush, the cleaning brush rotates and contacts the sliding tube, and the processing cylinder is fixedly connected to an equidistant combing plate, the cleaning brush rotates and contacts the adjacent combing plate.

[0013] Furthermore, it also includes a stirring mechanism for preventing polyaluminium chloride from precipitating in the charging box. The stirring mechanism is arranged in the charging box. The stirring mechanism includes a stirring frame, which is rotatably connected to the charging box. The stirring frame is fixedly connected with a protrusion, the tank body is fixedly connected with a fixed plate, the fixed plate is slidably connected with a sliding rod, one end of the sliding rod penetrates into the tank body and passes through the second circular plate, the other end of the sliding rod is fixedly connected with a concave block, the protrusion and the concave block are squeezed together, and a second spring is connected between the fixed plate and the sliding rod.

[0014] Furthermore, one end of the sliding rod located in the tank body is inclined, and the partition plate is pressed and matched with the sliding rod.

[0015] Furthermore, it also includes a cleaning mechanism for cleaning out the filtered impurities. The cleaning mechanism is arranged on the tank body. The cleaning mechanism includes a suction pump, which is fixedly connected to the tank body. The suction pump is connected to a suction pipe. The suction pipe runs through the tank body and the second circular plate. The suction pump is connected to a discharge pipe.

[0016] The present invention has the following advantages: 1. The three cavities formed by the treatment tube and the partition plate continuously contain sewage for segmented treatment. The partition plate directly puts polyaluminium chloride into the sewage for coagulation, thereby prolonging the coagulation reaction time of the sewage in the treatment tube, thereby improving the sewage purification effect.

[0017] 2. The self-rotation of the mixing frame can evenly mix the sewage and polyaluminium chloride in the cavity and improve the coagulation effect.

[0018] 3. Through the self-rotation of the mixing frame and the extrusion of the sliding tube, polyaluminium chloride can be discharged intermittently and quantitatively, which can reduce waste and further improve the mixing effect of polyaluminium chloride and sewage.

[0019] 4. When the cleaning brush rotates to contact the sliding tube, the rotation of the cleaning brush can clean the flocs on the sliding tube to prevent the sliding tube from being blocked.

[0020] 5. The stirring rack continuously rotates forward and reverse to stir the polyaluminium chloride in the loading box, which can prevent the precipitation of polyaluminium chloride from causing inconsistent concentration, thereby affecting the coagulation effect of sewage in the previous and next time periods.

[0021] 6. The flocs produced by coagulation remain in the cavity, and the suction pump operates to extract the remaining flocs in the cavity through the suction pipe and discharge them through the discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0024] Figure 3 It is a schematic cross-sectional view of the processing cylinder, partition plate and other components of the present invention.

[0025] Figure 4 It is a schematic cross-sectional structure diagram of the partition plate, the liquid outlet tray and the baffle plate of the present invention.

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the mixing mechanism of the present invention.

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the quantitative mechanism of the present invention.

[0028] Figure 7 It is a partial cross-sectional structural schematic diagram of the quantitative mechanism of the present invention.

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the anti-blocking mechanism of the present invention.

[0030] Fig. 9It is a partial three-dimensional structural schematic diagram of the anti-blocking mechanism of the present invention.

[0031] Fig.10 It is a schematic diagram of the three-dimensional structure of the carding plate of the present invention.

[0032] Fig.11 It is a schematic diagram of the three-dimensional structure of the stirring mechanism of the present invention.

[0033] Fig.12 It is a three-dimensional structural schematic diagram of the cleaning mechanism of the present invention.

[0034] Figure numbers: 1_tank body, 2_water inlet pipe, 3_water outlet pipe, 4_charging box, 5_pressure pump, 6_delivery pipe, 7_first circular plate, 8_second circular plate, 9_filter screen, 10_processing cylinder, 11_partition plate, 12_liquid outlet plate, 13_baffle, 14_motor, 15_first gear ring, 16_fixed frame, 17_mixing frame, 18_first gear, 19_liquid outlet pipe, 20_sliding pipe, 21_first spring, 22_blocking rod, 23_second gear ring, 24_rotating frame, 241_second gear, 25_cleaning brush, 26_combing plate, 27_stirring frame, 28_bump, 29_fixed plate, 30_sliding rod, 31_concave block, 32_second spring, 33_suction pump, 34_suction pipe, 35_discharge pipe. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Example 1: A polyaluminium chloride sewage treatment device based on urban water purification, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, it includes a tank body 1, a water inlet pipe 2, a water outlet pipe 3, a charging box 4, a pressure pump 5, a delivery pipe 6, a first circular plate 7, a second circular plate 8, a filter screen 9, a treatment cylinder 10, a partition plate 11, a liquid outlet tray 12, a baffle 13, a motor 14 and a mixing mechanism. The upper side of the tank body 1 is connected with the water inlet pipe 2, the lower side of the tank body 1 is connected with the water outlet pipe 3, the left side of the tank body 1 is fixedly connected with the charging box 4, the lower part of the charging box 4 is fixedly connected with the pressure pump 5, the pressure pump 5 is connected with the charging box 4 through a pipeline, the lower side of the pressure pump 5 is connected with the delivery pipe 6, the upper part of the tank body 1 is fixedly connected with the first circular plate 7, the lower part of the tank body 1 is fixedly connected with the second circular plate 8, the first circular plate 7 and the second circular plate 8 are both provided with through holes communicating with the tank body 1, the through holes are located far away from each other, and the second circular plate 8 is fixedly connected at an eccentric position There is a filter screen 9, and a treatment cylinder 10 is rotatably connected between the first circular plate 7 and the second circular plate 8. Three equidistantly distributed water inlets are opened on the upper part of the treatment cylinder 10. A partition plate 11 is fixedly connected inside the treatment cylinder 10. The partition plate 11 is a hollow structure and divides the inside of the treatment cylinder 10 into three cavities of the same size. The delivery pipe 6 passes through the tank body 1 and the second circular plate 8 and is connected to the partition plate 11. Three groups of equidistantly distributed liquid outlet discs 12 are rotatably connected to the partition plate 11, and the liquid outlet discs 12 are in a group of two. Three equidistantly distributed baffles 13 are fixedly connected to the lower part of the partition plate 11. A motor 14 is fixedly connected to the upper side of the first circular plate 7, and the output shaft of the motor 14 is connected to the treatment cylinder 10. A mixing mechanism is provided on the first circular plate 7 and the treatment cylinder 10, and the mixing mechanism can mix sewage and polyaluminium chloride.

[0037] When using the device, the staff introduces sewage into the tank body 1 through the water inlet pipe 2, and then starts the motor 14 and the pressure pump 5. The pressure pump 5 operates to transport the polyaluminium chloride in the charging box 4 into the partition plate 11 through the delivery pipe 6, and the output shaft of the motor 14 rotates to drive the treatment cylinder 10 and the partition plate 11 to rotate. When a water inlet on the treatment cylinder 10 is rotated to communicate with the through hole on the first circular plate 7, the sewage introduced by the water inlet pipe 2 can pass through the first circular plate 7 and flow into a cavity formed by the treatment cylinder 10 and the partition plate 11. When the next water inlet on the treatment cylinder 10 is rotated to communicate with the through hole on the first circular plate 7, the sewage will enter the next cavity formed by the treatment cylinder 10 and the partition plate 11, and the polyaluminium chloride in the partition plate 11 will be put into the sewage through the liquid outlet tray 12. The mixing mechanism mixes the sewage and polyaluminium chloride for flocculation reaction. When the cavity formed by the treatment cylinder 10 and the partition plate 11 rotates to communicate with the through hole on the second circular plate 8, the coagulated sewage can be filtered through the filter screen 9 and then transported downward. When the filter screen 9 filters the drainage, the baffle 13 can ensure that the sewage in the drainage cavity will not flow back into an adjacent cavity. The filtered sewage is finally discharged through the outlet pipe 3. The sewage introduced by the water inlet pipe 2 can be treated in sections through the continuous rotation of the treatment cylinder 10 to ensure that the polyaluminium chloride is evenly mixed with the sewage. Moreover, since the through holes opened on the first circular plate 7 and the second circular plate 8 are arranged to be far away from each other, the coagulation reaction time of the sewage in the treatment cylinder 10 can be extended, thereby improving the sewage purification effect. When the device is used, the staff turns off the motor 14 and the pressure pump 5.

[0038] like Figure 2 and Figure 5 As shown, the mixing mechanism includes a first gear ring 15, a fixed frame 16, a mixing frame 17 and a first gear 18. The first gear ring 15 is embedded on the first circular plate 7. Three circumferentially equidistantly distributed fixed frames 16 are fixedly connected to the upper part of the processing cylinder 10. The mixing frame 17 is rotatably connected to the fixed frame 16. The first gear 18 is fixedly connected to the upper part of the mixing frame 17, and the first gear 18 is meshed with the first gear ring 15.

[0039] When the device is used, the treatment cylinder 10 rotates through the fixed frame 16 to drive the mixing frame 17 to revolve, and the rotation of the mixing frame 17 drives the first gear 18 to revolve. When the first gear 18 revolves, it engages with the first ring gear 15 to rotate. The rotation of the first gear 18 drives the mixing frame 17 to rotate. The rotation of the mixing frame 17 can evenly mix the sewage and polyaluminium chloride in the cavity, thereby improving the coagulation effect.

[0040] Embodiment 2: Based on embodiment 1, Figure 2 , Figure 6 and Figure 7As shown, it also includes a quantitative mechanism, which can quantitatively discharge polyaluminium chloride, and the quantitative mechanism includes a liquid outlet pipe 19, a sliding pipe 20, a first spring 21 and a blocking rod 22. The liquid outlet plate 12 is connected to six liquid outlet pipes 19 equidistantly distributed in the circumference, and the sliding pipe 20 is slidably connected in the liquid outlet pipe 19. The first spring 21 is connected between the sliding pipe 20 and the adjacent liquid outlet plate 12. Six circumferentially equidistantly distributed blocking rods 22 are fixedly connected to the liquid outlet plate 12. The blocking rods 22 are located in adjacent liquid outlet pipes 19 and block adjacent sliding pipes 20.

[0041] By setting a quantitative mechanism, intermittent quantitative discharge of polyaluminium chloride can be achieved, which reduces waste and further improves the mixing effect of polyaluminium chloride and sewage. The specific operation is as follows: in the initial state, the blocking rod 22 blocks the sliding tube 20, and the polyaluminium chloride in the partition plate 11 cannot flow out through the liquid outlet plate 12. When the mixing frame 17 rotates to contact the sliding tube 20, the mixing frame 17 will push the sliding tube 20 to revolve, thereby driving the liquid outlet plate 12 to rotate. When the liquid outlet plate 12 rotates, it will drive all the liquid outlet pipes 19 and the sliding tubes 20 installed thereon to revolve, further mixing the sewage. When the sliding tube 20 pushed by the mixing frame 17 moves to the limit distance, the mixing frame 17 continues to rotate. When the mixing rack 17 rotates to separate from the sliding tube 20, the sliding tube 20 will slide outward and be blocked by the blocking rod 22 again under the action of the first spring 21. When the mixing rack 17 rotates to contact with the next sliding tube 20, repeating the above actions can make the sliding tube 20 discharge polyaluminium chloride intermittently and quantitatively, which can reduce waste and further improve the mixing effect of polyaluminium chloride and sewage.

[0042] like Figure 8 , Fig. 9 and Fig.10 As shown, it also includes an anti-blocking mechanism, which can prevent the sliding tube 20 from being blocked. The anti-blocking mechanism includes a second gear ring 23, a rotating frame 24, a second gear 241, a cleaning brush 25 and a combing plate 26. The second gear ring 23 is fixedly connected to the liquid outlet plate 12, and three groups of equidistant rotating frames 24 are rotatably connected to the lower part of the partition plate 11, and each group of rotating frames 24 consists of two. The rotating frame 24 is fixedly connected to the second gear 241, and the second gear 241 is meshed with the adjacent second gear ring 23. The rotating frame 24 is fixedly connected to three equidistant cleaning brushes 25, and the cleaning brush 25 rotates to contact the sliding tube 20. Three groups of equidistant combing plates 26 are fixedly connected to the lower part of the processing cylinder 10, and each group of combing plates 26 consists of two. The cleaning brush 25 rotates to contact the adjacent combing plates 26.

[0043] By setting up an anti-blocking mechanism, the flocs on the sliding tube 20 can be cleaned to prevent the sliding tube 20 from being blocked. The specific operation is as follows: when the liquid discharge tray 12 rotates, it drives the second gear ring 23 to rotate, the rotation of the second gear ring 23 drives the second gear 241 to rotate, the rotation of the second gear 241 drives the rotating frame 24 to rotate, and the rotation of the rotating frame 24 drives the cleaning brush 25 to rotate. When the cleaning brush 25 rotates to contact the sliding tube 20, the rotation of the cleaning brush 25 can clean the flocs on the sliding tube 20 to prevent the sliding tube 20 from being blocked. When the cleaning brush 25 rotates to contact the combing plate 26, the combing plate 26 can clean the flocs adhered to the cleaning brush 25.

[0044] like Figure 1 , Figure 2 and Fig.11 As shown, it also includes a stirring mechanism, which can prevent polyaluminium chloride from precipitating in the charging box 4. The stirring mechanism includes a stirring frame 27, a protrusion 28, a fixed plate 29, a sliding rod 30, a concave block 31 and a second spring 32. The lower part of the charging box 4 is rotatably connected with the stirring frame 27, and the front side of the stirring frame 27 is fixedly connected with a protrusion 28. The lower part of the tank body 1 is fixedly connected with a fixing plate 29, and the fixing plate 29 is slidably connected with a sliding rod 30. The right part of the sliding rod 30 penetrates into the tank body 1 and passes through the second circular plate 8. The upper right end of the sliding rod 30 is inclined. The partition plate 11 rotates to squeeze the sliding rod 30 to slide downward. The upper left end of the sliding rod 30 is fixedly connected with a concave block 31, and the protrusion 28 is located in the concave block 31. A second spring 32 is connected between the fixing plate 29 and the sliding rod 30.

[0045] By setting up a stirring mechanism, it is possible to prevent polyaluminium chloride precipitation from causing inconsistent concentrations, thereby affecting the effect of sewage coagulation in the previous and next time periods. The specific operation is as follows: when the partition plate 11 rotates to contact the sliding rod 30, the partition plate 11 continues to rotate to squeeze the sliding rod 30 to slide downward, the second spring 32 is stretched, the sliding rod 30 slides downward to drive the concave block 31 to move downward, and when the concave block 31 moves downward to contact the convex block 28, the concave block 31 continues to move downward to push the convex block 28 to rotate downward, and the convex block 28 rotates downward to drive the stirring frame 2 7 rotates, when the partition plate 11 rotates to disengage from the sliding rod 30, under the action of the second spring 32, the sliding rod 30 slides upward and resets, and the concave block 31 moves upward and resets to push the protrusion 28 to rotate upward, and the upward rotation of the protrusion 28 drives the stirring frame 27 to reverse, and when the partition plate 11 rotates again to contact the sliding rod 30, repeating the above action can make the stirring frame 27 continuously rotate forward and reverse, so that the stirring frame 27 rotates forward and reverse to stir the polyaluminium chloride in the charging box 4, which can prevent the polyaluminium chloride from precipitating.

[0046] like Figure 1 , Figure 2 and Fig.12 As shown, a cleaning mechanism is also included, which can clean out the filtered impurities. The cleaning mechanism includes a suction pump 33, a suction pipe 34 and a discharge pipe 35. The suction pump 33 is fixedly connected to the lower right part of the tank body 1, and the suction pump 33 is connected to the suction pipe 34. The suction pipe 34 runs through the lower right part of the tank body 1 and the second circular plate 8, and the discharge pipe 35 is connected to the suction pump 33.

[0047] By setting up a cleaning mechanism, the flocs generated by sewage treatment can be discharged. The specific operation is as follows: after the sewage in the cavity is discharged through the filter screen 9, the partition plate 11 continues to rotate to continue to push the filtered flocs, and the suction pump 33 operates to extract the remaining flocs in the cavity through the suction pipe 34 and discharge them through the discharge pipe 35.

[0048] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A polyaluminium chloride sewage treatment device based on urban water purification, comprising a tank body (1), the tank body (1) being connected to a water inlet pipe (2), the other side of the tank body (1) away from the water inlet pipe (2) being connected to a water outlet pipe (3), the tank body (1) being fixedly connected to a charging box (4), the charging box (4) being fixedly connected to a booster pump (5), the booster pump (5) being connected to the charging box (4) through a pipeline, the booster pump (5) being connected to a delivery pipe (6), characterized in that: The tank body (1) further comprises a first circular plate (7), the first circular plate (7) being fixedly connected to the tank body (1), the tank body (1) being fixedly connected to a second circular plate (8), the second circular plate (8) being fixedly connected to a filter screen (9) at an eccentric position, a treatment cylinder (10) being rotatably connected between the first circular plate (7) and the second circular plate (8), the treatment cylinder (10) being fixedly connected to a partition plate (11), a delivery pipe (6) passing through the tank body (1) and communicating with the second circular plate (8) and the partition plate (11), the partition plate (11) being rotatably connected to a liquid outlet plate (12) distributed at equal intervals, the partition plate (11) being fixedly connected to baffles (13) distributed at equal intervals, the first circular plate (7) being fixedly connected to a motor (14), the motor The output shaft of the machine (14) is connected to the treatment cylinder (10); the first circular plate (7) and the treatment cylinder (10) are provided with a mixing mechanism for mixing sewage and polyaluminium chloride; the mixing mechanism comprises a first gear ring (15); the first gear ring (15) is fixedly connected to the first circular plate (7); the treatment cylinder (10) is fixedly connected to a fixing frame (16) equidistantly distributed in the circumferential direction; the fixing frame (16) is rotatably connected to a mixing frame (17); the mixing frame (17) is fixedly connected to a first gear (18); the first gear (18) is meshed with the first gear ring (15); a quantitative mechanism for quantitatively discharging polyaluminium chloride is provided on the liquid outlet plate (12); the quantitative mechanism comprises a plurality of gears equidistantly distributed in the circumferential direction; The liquid outlet pipes (19) are equidistantly distributed in the circumferential direction and are connected to the liquid outlet plate (12). The liquid outlet pipes (19) are slidably connected to the sliding pipes (20). The sliding pipes (20) and the adjacent liquid outlet plate (12) are connected to a first spring (21). The liquid outlet plate (12) is fixedly connected to blocking rods (22) equidistantly distributed in the circumferential direction. The blocking rods (22) are located in adjacent liquid outlet pipes (19) and block the adjacent sliding pipes (20). When the sliding pipes (20) pushed by the mixing frame (17) move to a limit distance, the mixing frame (17) continues to rotate and squeezes the sliding pipes (20) to slide inwards. The first springs (21) are deformed, and the sliding pipes (20) slide inwards. After sliding, it is no longer blocked by the blocking rod (22). At this time, the polyaluminium chloride in the partition plate (11) can enter the liquid outlet pipe (19) through the liquid outlet plate (12) and finally be mixed with the sewage through the sliding pipe (20). When the mixing frame (17) rotates to be separated from the sliding pipe (20), under the action of the first spring (21) to reset, the sliding pipe (20) will slide outward and reset to be blocked by the blocking rod (22) again. When the mixing frame (17) rotates to contact the next sliding pipe (20), the above action is repeated, so that the sliding pipe (20) can intermittently and quantitatively discharge the polyaluminium chloride, thereby reducing waste and further improving the mixing effect of the polyaluminium chloride and sewage.The liquid discharge tray (12) is provided with an anti-blocking mechanism for preventing the sliding tube (20) from being blocked, the anti-blocking mechanism comprising a second gear ring (23), the second gear ring (23) being fixedly connected to the liquid discharge tray (12), the partition plate (11) being rotatably connected to a rotating frame (24) distributed at equal intervals, the rotating frame (24) being fixedly connected to a second gear (241), the second gear (241) being meshed with an adjacent second gear ring (23), the rotating frame (24) being fixedly connected to cleaning brushes (25) distributed at equal intervals, the cleaning brushes (25) being rotated to contact the sliding tube (20), the processing cylinder (10) being fixedly connected to combing plates (26) distributed at equal intervals, the cleaning brushes (25) being rotated to contact the adjacent combing plates (26) 6) contact; the charging box (4) is provided with a stirring mechanism for preventing the polyaluminium chloride in the charging box (4) from precipitating, the stirring mechanism comprising a stirring frame (27), the stirring frame (27) being rotatably connected to the charging box (4), the stirring frame (27) being fixedly connected with a projection (28), the tank body (1) being fixedly connected with a fixing plate (29), the fixing plate (29) being slidably connected with a sliding rod (30), one end of the sliding rod (30) being inserted into the tank body (1) and passing through the second circular plate (8), the other end of the sliding rod (30) being fixedly connected with a recess (31), the projection (28) and the recess (31) being pressed and matched, and a second spring (32) being connected between the fixing plate (29) and the sliding rod (30). ; 2. A polyaluminium chloride sewage treatment device based on urban water purification according to claim 1, characterized in that: The first circular plate (7) and the second circular plate (8) are both provided with through holes at eccentric positions which are in communication with the tank body (1), and the through holes are located away from each other.

3. A polyaluminium chloride sewage treatment device based on urban water purification according to claim 1, characterized in that: The treatment cylinder (10) is provided with water inlets which are evenly spaced.

4. A polyaluminium chloride sewage treatment device based on urban water purification according to claim 1, characterized in that: The partition plate (11) is a hollow structure and divides the processing cylinder (10) into a plurality of cavities of the same size.

5. A polyaluminium chloride sewage treatment device based on urban water purification according to claim 1, characterized in that: One end of the sliding rod (30) located in the tank body (1) is arranged to be inclined, and the partition plate (11) is pressed and fitted with the sliding rod (30).

6. A polyaluminium chloride sewage treatment device based on urban water purification according to claim 1, characterized in that: The invention also comprises a cleaning mechanism for cleaning out the filtered impurities, the cleaning mechanism being arranged on the tank body (1), the cleaning mechanism comprising a suction pump (33), the suction pump (33) being fixedly connected to the tank body (1), the suction pump (33) being connected to a suction pipe (34), the suction pipe (34) passing through the tank body (1) and the second circular plate (8), and the suction pump (33) being connected to a discharge pipe (35).

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