Sewage treatment device based on adsorption type polyaluminum chloride-based flocculant

Abstract

The sewage treatment device comprises a sewage treatment tank, a ball valve is communicated and mounted on the lower surface of the sewage treatment tank, a gear motor is fixedly mounted at one end of the sewage treatment tank, and an output sealing shaft of the gear motor penetrates into the sewage treatment tank and is fixedly provided with a spiral pushing disc; a drainage hole is formed in the surface of the spiral pushing disc, a discharging mechanism is fixedly installed on the upper surface of the sewage treatment tank, a collecting groove position is formed in one end in the sewage treatment tank, the spiral pushing disc can push flocculates formed by aggregating suspended particles into the collecting groove position in a concentrated mode, and a discharging mechanism is installed in the collecting groove position in a sliding mode. Through the design of the discharging mechanism, the discharging mechanism can pour a suitable polyaluminum chloride-based flocculating agent into the sewage treatment tank according to the height of the water level, and can ensure that the dosage of the added agent is accurate, so that the situation that the agent is wasted or the treatment effect is not ideal due to the fact that the agent is added too little is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device based on an adsorptive polyaluminum chloride-based flocculant. Background Technique

[0002] The flocculation tank is a type of sedimentation tank in wastewater treatment. The coagulation process is the most basic and extremely important process in industrial water and domestic sewage treatment. By adding some agents to the water, the particles that are difficult to precipitate in the water can aggregate with each other to form colloids, and then combine with the impurities in the water body to form larger flocs. The flocs have a strong adsorption force, which can not only adsorb suspended solids, but also adsorb some bacteria and dissolved substances. Through adsorption, the volume of the flocs increases and they sink. Polyaluminum chloride is one of the flocculants.

[0003] Polyaluminum chloride (Poly aluminum Chloride), code-named PAC, is usually also called a water purifying agent or a flocculant. It is a yellow or light yellow, dark brown, dark gray resinous solid. This product has strong bridging adsorption performance. During the hydrolysis process, physical and chemical processes such as coagulation, adsorption, and precipitation occur. It is widely used in the fields of drinking water, industrial water, and sewage treatment.

[0004] For example, the patent with the national authorized patent publication number CN215403524U discloses a sewage treatment device using a super-adsorptive polyaluminum chloride-based flocculant, including a treatment tank. The upper end surface of the treatment tank is detachably connected with a top cover. Three partitions are fixedly connected inside the treatment tank. Fixed rods are fixedly connected to the left and right sides of the inner wall of the flocculation tank. The spiral blades on the outer walls of the two rotating rods are arranged in opposite directions, so as to conduct the flocculant to both sides, so that the flocculant is evenly distributed inside the uniform cylinder. The outer wall of the uniform cylinder is a grid structure, so that while conducting the flocculant to the left and right sides, the flocculant evenly drops into the inside of the flocculation tank through the grid, achieving the effect of evenly putting the flocculant, improving the putting range of the flocculant, improving the flocculation effect and the overall efficiency of sewage treatment, and solving the problem that the flocculant is unevenly put in the existing sewage treatment device, resulting in incomplete reaction of the flocculant in the sewage treatment tank and reducing the overall efficiency of sewage treatment.

[0005] However, the above-mentioned sewage treatment device using a super-adsorptive polyaluminum chloride-based flocculant cannot automatically add the dosage of the polyaluminum chloride-based flocculant according to the sewage volume during the sewage treatment process, which will lead to insufficient or excessive dosage of the flocculant. Moreover, it cannot concentrate and push the flocs formed by aggregating suspended particles together to one place for centralized storage, which will cause the flocs to be dispersed in the entire sewage treatment tank, increasing the complexity of subsequent treatment. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a sewage treatment device based on an adsorption-type polyaluminum chloride-based flocculant, so as to solve the problems proposed in the above-mentioned background technology that during the sewage treatment process, the dosage of the polyaluminum chloride-based flocculant cannot be automatically added according to the sewage volume, and the flocs formed by aggregating suspended particles cannot be concentrated and pushed to one place for centralized storage.

[0007] To achieve the above purpose, the present utility model provides the following technical solutions:

[0008] A sewage treatment device based on an adsorption-type polyaluminum chloride-based flocculant, including: a sewage treatment tank, a ball valve is connected and installed on the lower surface of the sewage treatment tank, a reduction motor is fixedly installed at one end of the sewage treatment tank, the output sealing shaft of the reduction motor penetrates into the sewage treatment tank and is fixedly installed with a spiral pushing plate, hydrophobic holes are formed on the surface of the spiral pushing plate, a feeding mechanism is fixedly installed on the upper surface of the sewage treatment tank, a collection slot is formed at one end inside the sewage treatment tank, and the spiral pushing plate can concentrate and push the flocs formed by aggregating suspended particles into the collection slot, and a discharge mechanism is slidably installed in the collection slot.

[0009] Preferably, a connecting cylinder is fixedly installed at one end of the sewage treatment tank, a screen is fixedly installed at one end of the connecting cylinder and is connected and communicated with the sewage treatment tank, and a water level monitoring end of the feeding mechanism is slidably installed inside the connecting cylinder.

[0010] Preferably, the discharge mechanism includes an electric push rod, the electric push rod is fixedly installed on both sides of the sewage treatment tank, a connecting arm is fixedly installed at one end of the piston rod of the electric push rod, and a tray is fixedly installed at the other end of the connecting arm, and the tray is hermetically installed in the collection slot.

[0011] Preferably, the tray can be pulled down and slid out of the sewage treatment tank from the collection slot by the electric push rod.

[0012] Preferably, the feeding mechanism includes a floating plate, the floating plate is slidably installed inside the connecting cylinder, an infrared sensor is fixedly installed on the upper surface of the connecting cylinder, the infrared emission end of the infrared sensor faces the floating plate, the signal emission end of the infrared sensor is connected to the signal receiving end of the controller, and the controller is fixedly installed at one end of the connecting cylinder.

[0013] Preferably, the control output end of the controller is electrically connected to the electric control end of the servo motor, the servo motor is fixedly installed at one end of the U-shaped cylinder, connecting plates are fixedly installed on both sides of the outer surface of the U-shaped cylinder, the U-shaped cylinder is installed above the upper surface of the sewage treatment tank through the connecting plates in a suspended manner, and a storage cylinder is fixedly installed on the upper surface of the U-shaped cylinder.

[0014] Preferably, the output shaft of the servo motor penetrates into the U-shaped cylinder and a roller is fixedly installed at the end. The roller is rotatably installed in the annular groove at the lower half of the U-shaped cylinder in a fitting manner. Eight groups of material storage ports are formed on the outer surface of the roller, and each group of material storage ports can be flush with the discharge port. The discharge port is opened on the lower surface of the U-shaped cylinder.

[0015] Preferably, the models of the controller and the infrared sensor are HC-SR04 and Sharp GP2Y0A21YK0F.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. Through the design of the sewage treatment tank, the reduction motor, the spiral pushing disc, the collection tank position, the excretion mechanism and the feeding mechanism, when treating sewage, the sewage can be poured into the sewage treatment tank. During the process of pouring the sewage into the sewage treatment tank, the sewage will pass through the sieve mesh and enter the connecting cylinder. The water level monitoring end of the feeding mechanism in the connecting cylinder will float according to the water level in the connecting cylinder, and it can make the water level monitoring end of the feeding mechanism judge the height of the water level according to the floating distance, and it can make the feeding mechanism pour the appropriate polyaluminum chloride-based flocculant into the sewage treatment tank according to the height of the water level, which can ensure the accuracy of the dosage of the added medicine, thereby avoiding the situation of wasting medicine or adding too little resulting in unsatisfactory treatment effect.

[0018] The sewage will be mixed with the polyaluminum chloride-based flocculant (PAC). The flocculant will make the suspended particles in the water aggregate together through adsorption and electro-neutralization effects to form larger flocs. Subsequently, the reduction motor can be started to drive the spiral pushing disc to rotate in the sewage treatment tank, which can push the aggregated flocs into the collection tank position for centralized storage. Then, after a long time of precipitation, the treated sewage can be discharged or conveyed to another sewage treatment device by opening the ball valve connected and installed on the lower surface of the sewage treatment tank. For the flocs centrally stored in the collection tank position, the excretion mechanism can be started to vertically pull down in the collection tank position, which can make the excretion mechanism pull out the centrally stored flocs from the sewage treatment tank, realizing the function of centralized collection and storage of the flocs. And along with the rotation of the spiral pushing disc, the sludge can also be pushed into the collection tank position, which can keep the environment in the sewage treatment tank clean, avoid their long-term deposition in the sewage treatment tank, reduce the possibility of secondary pollution, keep the clean environment of the treatment tank, and thus improve the treatment efficiency and effect of the overall system.

[0019] 2. Through the design of a floating plate, a controller, an infrared sensor, a storage cylinder, a U-shaped cylinder, a servo motor, rollers and a material storage port, when sewage is poured into the sewage treatment pool, the sewage will pass through the sieve mesh and enter the connecting cylinder. The floating plate slidably installed in the connecting cylinder will float in the connecting cylinder according to the water level, which can shorten the distance between the floating plate and the infrared sensor. The infrared sensor will calculate the distance between the floating plate and the infrared sensor, that is, the height of the water level, according to the change in the intensity of the infrared light received. The infrared sensor will send the height distance signal of the rising floating plate to the controller, and the controller will control the rotation angle of the servo motor through the electric control end according to the height of the water level. The servo motor will drive the rollers to rotate the same angle in the U-shaped cylinder, and the rollers will drive the material storage port opened on the outer surface to face the storage cylinder, enabling the polyaluminum chloride-based flocculant stored in the storage cylinder to enter the material storage port. As the rollers rotate, it can drive the material storage port opened on the outer surface to be flush with the discharge port at the lower end of the outer surface of the U-shaped cylinder, and the polyaluminum chloride-based flocculant in the material storage port can be poured into the sewage treatment pool. It can make the rollers rotate multiple groups of material storage ports to be flush with the discharge port according to the rotation angle, pour the polyaluminum chloride-based flocculant in a specific number of material storage ports into the sewage treatment pool, and can pour the appropriate polyaluminum chloride-based flocculant into the sewage treatment pool according to the height of the water level, ensuring the accuracy of the dosage of the added medicine, thus avoiding the situation of wasting medicine or insufficient dosage resulting in unsatisfactory treatment effect.

[0020] 3. Through the design of an electric push rod, a connecting arm and a tray, the sewage will be mixed with the polyaluminum chloride-based flocculant (PAC). The flocculant will cause the suspended particles in the water to aggregate together through adsorption and electro-neutralization to form larger flocs. Subsequently, by starting the reduction motor to drive the spiral pushing disk to rotate in the sewage treatment pool, the aggregated flocs can be pushed into the tray in the collection slot for centralized storage. Then, after a long time of precipitation, the treated sewage can be discharged or transported to another sewage treatment device by opening the ball valve connected and installed on the lower surface of the sewage treatment pool. The flocs concentrated in the collection slot can be pulled out of the sewage treatment pool vertically by starting the electric push rod to drive the connecting arm on the upper surface of the piston rod to drive the tray in the collection slot, realizing the centralized discharge of the flocs from the sewage treatment pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the sewage treatment pool and the spiral pushing disk of the present utility model;

[0022] Figure 2 It is a schematic structural diagram of the excretion mechanism of the present utility model;

[0023] Figure 3 It is a schematic structural diagram of the floating plate and the infrared sensor of the present utility model;

[0024] Figure 4 is a schematic structural diagram of the tray of the present utility model;

[0025] Figure 5 is a schematic structural diagram of the roller and the material storage port of the present utility model.

[0026] In the figure: 1, sewage treatment tank; 101, connecting cylinder; 102, collection tank position; 103, screen; 2, reduction motor; 201, spiral pushing plate; 3, discharge mechanism; 301, electric push rod; 302, connecting arm; 303, tray; 4, feeding mechanism; 401, floating plate; 402, controller; 403, infrared sensor; 404, storage cylinder; 405, servo motor; 406, roller; 407, material storage port; 408, discharge port; 409, U-shaped cylinder. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1 - 5 , the following technical solutions are provided in this embodiment:

[0029] As Figures 1 - 2 shown, a sewage treatment device based on an adsorption-type polyaluminum chloride-based flocculant includes: a sewage treatment tank 1, a ball valve is connected and installed on the lower surface of the sewage treatment tank 1, a reduction motor 2 is fixedly installed at one end of the sewage treatment tank 1, the output sealing shaft of the reduction motor 2 penetrates into the sewage treatment tank 1 and is fixedly installed with a spiral pushing plate 201, hydrophobic holes are formed on the surface of the spiral pushing plate 201, a feeding mechanism 4 is fixedly installed on the upper surface of the sewage treatment tank 1, a collection tank position 102 is opened at one end inside the sewage treatment tank 1, and the spiral pushing plate 201 can centrally push the flocs formed by the aggregation of suspended particles into the collection tank position 102, and a discharge mechanism 3 is slidably installed in the collection tank position 102.

[0030] A connecting cylinder 101 is fixedly installed at one end of the sewage treatment tank 1, a screen 103 is fixedly installed at one end of the connecting cylinder 101 and is connected to the sewage treatment tank 1, and the water level monitoring end of the feeding mechanism 4 is slidably installed in the connecting cylinder 101.

[0031] Through the design of the sewage treatment tank 1, the reduction motor 2, the spiral pushing plate 201, the collection tank position 102, the discharge mechanism 3 and the feeding mechanism 4, when treating sewage, the sewage can be poured into the sewage treatment tank 1. During the process of pouring the sewage into the sewage treatment tank 1, the sewage will pass through the screen 103 and enter the connecting cylinder 101. The water level monitoring end of the feeding mechanism 4 in the connecting cylinder 101 will float according to the water level in the connecting cylinder 101, which can enable the water level monitoring end of the feeding mechanism 4 to judge the height of the water level according to the floating distance, and enable the feeding mechanism 4 to pour the appropriate polyaluminum chloride-based flocculant into the sewage treatment tank 1 according to the height of the water level, ensuring the accuracy of the dosage of the added medicine, thus avoiding the situation of wasting medicine or adding too little medicine resulting in unsatisfactory treatment effect;

[0032] The sewage will be mixed with the polyaluminum chloride-based flocculant (PAC). The flocculant will cause the suspended particles in the water to aggregate together through adsorption and electro-neutralization to form larger flocs. Subsequently, the reduction motor 2 can be started to drive the spiral pushing plate 201 to rotate in the sewage treatment tank 1, which can push the aggregated flocs into the collection tank position 102 for centralized storage. Then, after a long time of precipitation, the treated sewage can be discharged or transported to another sewage treatment device by opening the ball valve installed in communication with the lower surface of the sewage treatment tank 1. For the flocs centrally stored in the collection tank position 102, the discharge mechanism 3 can be started to vertically pull down in the collection tank position 102, enabling the discharge mechanism 3 to pull out the centrally stored flocs from the sewage treatment tank 1, realizing the function of centralized collection and storage of the flocs. Moreover, as the spiral pushing plate 201 rotates, the sludge can also be pushed into the collection tank position 102, keeping the environment in the sewage treatment tank 1 clean, avoiding their long-term deposition in the sewage treatment tank 1, reducing the possibility of secondary pollution, maintaining the clean environment of the treatment tank, and thus improving the treatment efficiency and effect of the overall system.

[0033] As Figures 3 - 5 shown, the discharge mechanism 3 includes an electric push rod 301. The electric push rod 301 is fixedly installed on both sides of the sewage treatment tank 1. One end of the piston rod of the electric push rod 301 is fixedly installed with a connecting arm 302, and the other end of the connecting arm 302 is fixedly installed with a tray 303. The tray 303 is hermetically installed in the collection tank position 102.

[0034] The tray 303 can be pulled down and slid out of the sewage treatment tank 1 from the collection tank position 102 by the electric push rod 301.

[0035] The blanking mechanism 4 includes a floating plate 401 which is slidably installed in the connecting cylinder 101. The upper surface of the connecting cylinder 101 is fixedly installed with an infrared sensor 403. The infrared emission end of the infrared sensor 403 faces the floating plate 401. The signal emission end of the infrared sensor 403 is connected to the signal receiving end of the controller 402. The controller 402 is fixedly installed at one end of the connecting cylinder 101.

[0036] The control output end of the controller 402 is electrically connected to the electric control end of the servo motor 405. The servo motor 405 is fixedly installed at one end of the U-shaped cylinder 409. Both sides of the outer surface of the U-shaped cylinder 409 are fixedly installed with connecting plates. The U-shaped cylinder 409 is installed above the upper surface of the sewage treatment tank 1 through the connecting plates. The upper surface of the U-shaped cylinder 409 is fixedly installed with a storage cylinder 404.

[0037] The output shaft of the servo motor 405 penetrates into the U-shaped cylinder 409 and a roller 406 is fixedly installed at the end. The roller 406 is rotatably installed in the annular groove at the lower half of the U-shaped cylinder 409 in a fitting manner. Eight groups of material storage ports 407 are formed on the outer surface of the roller 406. Each group of material storage ports 407 can be flush with the discharge port 408. The discharge port 408 is formed on the lower surface of the U-shaped cylinder 409.

[0038] The models of the controller 402 and the infrared sensor 403 are HC-SR04 and Sharp GP2Y0A21YK0F.

[0039] Through the design of the electric push rod 301, connecting arm 302, tray 303, floating plate 401, controller 402, infrared sensor 403, storage cylinder 404, U-shaped cylinder 409, servo motor 405, roller 406 and material storage port 407, when sewage is poured into the sewage treatment pool 1, the sewage will pass through the screen 103 and enter the connecting cylinder 101. The floating plate 401 slidably installed in the connecting cylinder 101 will float in the connecting cylinder 101 according to the water level, which can shorten the distance between the floating plate 401 and the infrared sensor 403. The infrared sensor 403 will calculate the distance between the floating plate 401 and the infrared sensor 403, that is, the height of the water level, according to the change in the intensity of the received infrared light. The infrared sensor 403 will send the height distance signal of the rising floating plate 401 to the controller 402. The controller 402 will control the rotation angle of the servo motor 405 through the electric control end according to the height of the water level. The servo motor 405 will drive the roller 406 to rotate the same angle in the U-shaped cylinder 409. The roller 406 will drive the material storage port 407 opened on the outer surface to face the storage cylinder 404, enabling the polyaluminum chloride-based flocculant stored in the storage cylinder 404 to enter the material storage port 407. As the roller 406 rotates, it can drive the material storage port 407 opened on the outer surface to be flush with the discharge port 408 at the lower end of the outer surface of the U-shaped cylinder 409, and the polyaluminum chloride-based flocculant in the material storage port 407 can be poured into the sewage treatment pool 1. The roller 406 can rotate multiple groups of material storage ports 407 to be flush with the discharge port 408 according to the rotation angle, pour the polyaluminum chloride-based flocculant in a specific number of material storage ports 407 into the sewage treatment pool 1, and can pour the appropriate polyaluminum chloride-based flocculant into the sewage treatment pool 1 according to the height of the water level, ensuring the accuracy of the dosage of the added medicine, thus avoiding the situation of wasting medicine or having an unsatisfactory treatment effect due to too little addition;

[0040] The sewage will be mixed with the polyaluminum chloride-based flocculant (PAC). The flocculant will cause the suspended particles in the water to aggregate together through adsorption and electro-neutralization to form larger flocs. Subsequently, the deceleration motor 2 can be started to drive the spiral pushing plate 201 to rotate in the sewage treatment pool 1, and the aggregated flocs can be pushed into the tray 303 in the collection tank position 102 for centralized storage. Subsequently, after a long time of precipitation, the treated sewage can be discharged or transported to another sewage treatment device by opening the ball valve connected and installed on the lower surface of the sewage treatment pool 1. The flocs concentrated in the collection tank position 102 can be discharged from the sewage treatment pool 1 by starting the electric push rod 301 to pull the connecting arm 302 on the upper surface of the piston rod to drive the tray 303 to slide vertically out of the sewage treatment pool 1 in the collection tank position 102, realizing the centralized discharge of the flocs from the sewage treatment pool 1.

[0041] Summarize and sort out the working steps of this solution according to the above technical solution: When treating sewage, the sewage can be poured into the sewage treatment tank 1. During the process of pouring the sewage into the sewage treatment tank 1, the sewage will pass through the screen 103 and enter the connecting cylinder 101. The floating plate 401 slidably installed in the connecting cylinder 101 will float in the connecting cylinder 101 according to the water level, which can shorten the distance between the floating plate 401 and the infrared sensor 403. The infrared sensor 403 will calculate the distance between the floating plate 401 and the infrared sensor 403, that is, the height of the water level, according to the change in the intensity of the infrared light received. The infrared sensor 403 will send the height distance signal of the rising of the floating plate 401 to the controller 402. The controller 402 will control the rotation angle of the servo motor 405 through the electric control end according to the height of the water level. The servo motor 405 will drive the roller 406 to rotate the same angle in the U-shaped cylinder 409. The roller 406 will drive the storage port 407 opened on the outer surface to face the storage cylinder 404, so that the polyaluminum chloride-based flocculant stored in the storage cylinder 404 can enter the storage port 407. As the roller 406 rotates, it can drive the storage port 407 opened on the outer surface to be flush with the discharge port 408 at the lower end of the outer surface of the U-shaped cylinder 409, and the polyaluminum chloride-based flocculant in the storage port 407 can be poured into the sewage treatment tank 1. The roller 406 can rotate multiple groups of storage ports 407 to be flush with the discharge port 408 according to the rotation angle, and pour the polyaluminum chloride-based flocculant in a specific number of storage ports 407 into the sewage treatment tank 1, and can pour the appropriate polyaluminum chloride-based flocculant into the sewage treatment tank 1 according to the height of the water level;

[0042] The sewage will be mixed with the polyaluminum chloride-based flocculant (PAC). The flocculant will cause the suspended particles in the water to aggregate together through adsorption and electro-neutralization to form larger flocs. Subsequently, the reduction motor 2 can be started to drive the spiral pushing plate 201 to rotate in the sewage treatment tank 1, and the aggregated flocs can be pushed into the tray 303 in the collection slot 102 for centralized storage. Subsequently, after a long time of precipitation, the treated sewage can be discharged or transported to another sewage treatment device by opening the ball valve connected and installed on the lower surface of the sewage treatment tank 1. The flocs centrally stored in the collection slot 102 can be discharged from the sewage treatment tank 1 by starting the electric push rod 301 to pull the connecting arm 302 on the upper surface of the piston rod to drive the tray 303 to slide vertically out of the sewage treatment tank 1.

[0043] In summary: It can pour the appropriate polyaluminum chloride-based flocculant into the sewage treatment tank 1 according to the height of the water level, which can ensure the accuracy of the dosage of the added medicine, thus avoiding the situation of wasting medicine or insufficient dosing resulting in unsatisfactory treatment effect.

[0044] Parts not involved in the present utility model are the same as the prior art or can be implemented by using the prior art. Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A sewage treatment device based on an adsorptive polyaluminum chloride-based flocculant, characterized in that Including: A sewage treatment tank (1), a ball valve is connected and installed on the lower surface of the sewage treatment tank (1), a speed reduction motor (2) is fixedly installed at one end of the sewage treatment tank (1), the output sealing shaft of the speed reduction motor (2) penetrates into the sewage treatment tank (1) and is fixedly installed with a spiral pushing plate (201), hydrophobic holes are formed on the surface of the spiral pushing plate (201), a feeding mechanism (4) is fixedly installed on the upper surface of the sewage treatment tank (1), a collection tank position (102) is formed at one end inside the sewage treatment tank (1), and the spiral pushing plate (201) can centrally push the flocs formed by the suspension particles into the collection tank position (102), and a discharge mechanism (3) is slidably installed in the collection tank position (102).

2. The sewage treatment device based on an adsorption-type polyaluminum chloride-based flocculant according to claim 1, wherein: A connecting cylinder (101) is fixedly installed at one end of the sewage treatment tank (1), a screen (103) is fixedly installed at one end of the connecting cylinder (101) and is communicated with the sewage treatment tank (1), and a water level monitoring end of the feeding mechanism (4) is slidably installed in the connecting cylinder (101).

3. The sewage treatment device based on the adsorptive polyaluminum chloride-based flocculant according to claim 1, wherein: The discharge mechanism (3) includes an electric push rod (301), the electric push rod (301) is fixedly installed on both sides of the sewage treatment tank (1), a connecting arm (302) is fixedly installed at one end of the piston rod of the electric push rod (301), and a tray (303) is fixedly installed at the other end of the connecting arm (302), and the tray (303) is hermetically installed in the collection tank position (102).

4. The sewage treatment device based on an adsorptive polyaluminum chloride-based flocculant according to claim 3, wherein: The tray (303) can be pulled down and slid out of the sewage treatment tank (1) from the collection tank position (102) by the electric push rod (301).

5. The sewage treatment device based on an adsorption-type polyaluminum chloride-based flocculant according to claim 1, wherein: The feeding mechanism (4) includes a floating plate (401), the floating plate (401) is slidably installed in the connecting cylinder (101), an infrared sensor (403) is fixedly installed on the upper surface of the connecting cylinder (101), the infrared emission end of the infrared sensor (403) faces the floating plate (401), the signal emission end of the infrared sensor (403) is connected to the signal receiving end of a controller (402), and the controller (402) is fixedly installed at one end of the connecting cylinder (101).

6. The sewage treatment device based on an adsorptive polyaluminum chloride-based flocculant according to claim 5, characterized in that: The control output end of the controller (402) is electrically connected to the electric control end of a servo motor (405), the servo motor (405) is fixedly installed at one end of a U-shaped cylinder (409), connecting plates are fixedly installed on both sides of the outer surface of the U-shaped cylinder (409), the U-shaped cylinder (409) is installed above the upper surface of the sewage treatment tank (1) through the connecting plates, and a storage cylinder (404) is fixedly installed on the upper surface of the U-shaped cylinder (409).

7. The sewage treatment device based on an adsorption-type polyaluminum chloride-based flocculant according to claim 6, wherein: The output shaft of the servo motor (405) penetrates into the U-shaped cylinder (409) and a roller (406) is fixedly installed at the end, the roller (406) is rotatably installed in the annular groove at the lower half of the U-shaped cylinder (409) in a fitting manner, eight groups of material storage ports (407) are formed on the outer surface of the roller (406), and each group of the material storage ports (407) can be flush with a discharge port (408), and the discharge port (408) is formed on the lower surface of the U-shaped cylinder (409).

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