Powdered activated carbon wet-process dosing device for water treatment

Abstract

The utility model discloses a powdered activated carbon wet-process dosing device for water treatment. Comprising a storage bin, an external feeding machine is connected to a feeding port of the storage bin, a discharging port of the storage bin is connected with a feeding port of a weighing device through a conveyor, a discharging port of the weighing device is connected with a dispensing water tank through a jet device, and an output port of the dispensing water tank is connected with a water inlet of a medicine storage water tank. And a water outlet of the medicine storage water tank is connected to an external water treatment system through a dosing pump. The powder activated carbon feeding device realizes accurate feeding of powder activated carbon, and is small in dust pollution, high in operation efficiency and uniform in feeding.

Description

Technical Field

[0001] The utility model relates to the technical field of environmentally friendly sewage treatment, in particular to a powdered activated carbon wet dosing device for water treatment. Background Art

[0002] Powdered activated carbon has the advantages of large specific surface area, strong adsorption capacity, fast adsorption speed, easy preparation, low price, flexible application method, strong adaptability to water quality, etc., and has great application prospects in water treatment. In water treatment, powdered activated carbon is generally added by wet method. The powdered activated carbon is added to the dispensing box manually or automatically and fully mixed with water, and then the prepared solution is transported to the dosing point by pump. The current powdered activated carbon dosing system is relatively simple and cannot continuously monitor the operating status, which often leads to low accuracy of the dosage and unstable water quality. In addition, in the prior art, powdered activated carbon is prone to dust generation during loading, unloading, feeding and preparation, and the operating conditions are poor, which seriously endangers the health of workers. Powdered activated carbon has poor fluidity and is easy to absorb moisture to form arches and bridges, making it impossible to accurately measure. At the same time, powdered activated carbon cannot diffuse rapidly in water, resulting in low dispensing and utilization efficiency, which affects the use effect. Summary of the invention

[0003] The utility model aims to solve the problems in the current technology and provide a powdered activated carbon wet dosing device for water treatment.

[0004] To achieve the above purpose, the technical solution of the utility model is:

[0005] A powdered activated carbon wet dosing device for water treatment comprises a storage bin, an external loader connected to the feed port of the storage bin, the discharge port of the storage bin connected to the feed port of a weighing device via a conveyor, the discharge port of the weighing device connected to a dispensing water tank via an ejector, the output port of the dispensing water tank connected to the water inlet of a medicine storage water tank, and the water outlet of the medicine storage water tank connected to an external water treatment system via a dosing pump.

[0006] As mentioned above, the storage bin includes a tank body, a dust collector and a feed port are arranged on the top of the tank body, the feed port on the top of the tank body serves as the feed port of the storage bin, the feed port on the top of the tank body is connected to an external loader through a feed pipe, a valve is arranged on the feed pipe, corresponding material level switches are arranged at different heights on the inner wall of the tank body, a vibrating hopper is arranged at the bottom of the tank body, a discharge valve is arranged at the bottom of the vibrating hopper, and the outlet of the discharge valve serves as the discharge port of the storage bin and is connected to the feed port of the conveyor.

[0007] As described above, the conveyor includes a discharge port. The discharge port of the conveyor is connected to the inlet of the conveyor discharge pipe through a pipeline. The outlet of the conveyor discharge pipe is inserted into the inlet of the weighing bin of the weighing device, and the outlet of the conveyor discharge pipe is movably opposed to the inlet of the weighing bin. The inlet of the weighing bin serves as the inlet of the weighing device. The top of the weighing bin is connected to the bearing plate through a weighing connection part, and a weighing sensing assembly is arranged between the bearing plate and the top of the weighing device support.

[0008] As described above, a weighing vibrating hopper is arranged at the bottom of the weighing bin. An outlet valve is arranged at the bottom of the weighing vibrating hopper. The outlet of the outlet valve serves as the outlet of the weighing device and is movably connected to the powder suction inlet pipeline of the injector through a pipeline. The water inlet of the injector is connected to the water outlet of the jet pump, the water inlet of the jet pump is connected to the water outlet of the medicine preparation water tank, and the water outlet of the injector is connected to the return port of the medicine preparation water tank.

[0009] As described above, the outlet of the conveyor discharge pipe is movably connected to the inlet of the weighing bin through a first sealed connection pipe, and the outlet of the outlet valve is movably connected to the powder suction inlet pipeline of the injector through a second sealed connection pipe.

[0010] As described above, a control valve is arranged on the pipeline between the conveyor and the conveyor discharge pipe.

[0011] As described above, a medicine preparation mixer and a liquid level sensor are installed in the medicine preparation water tank. The water replenishing port of the medicine preparation water tank is connected to an external water source through a water replenishing pipe.

[0012] As described above, there are multiple medicine storage water tanks. A medicine storage mixer and a liquid level sensor are arranged in each medicine storage water tank. The water outlet of each medicine storage water tank is connected to a medicine adding pump through a corresponding water outlet valve. The height of the output port of the medicine preparation water tank is greater than the height of the inlet of the medicine storage water tank. Each medicine storage water tank is connected to the output port of the medicine preparation water tank through an emptying valve.

[0013] As described above, the weighing sensing assembly includes a weighing flat plate. The center of the weighing flat plate is an opening. The conveyor discharge pipe passes through the central opening of the weighing flat plate from bottom to top and is connected to the discharge port of the conveyor. The weighing connection part passes through the central opening of the weighing flat plate and is connected to the bearing plate. The bearing plate is located on the weighing flat plate, and multiple weighing sensors are arranged between the weighing flat plate and the top of the weighing device support.

[0014] As described above, the weighing bin is a sealed cabin body, and an exhaust device 25 is arranged at the top of the weighing bin.

[0015] The beneficial technical effects of the present utility model are:

[0016] The utility model adopts a weighing device and a chemical dosing water tank to accurately proportion powdered activated carbon quantitatively. The chemical dosing water tank is rapidly prepared by a jet mixer. The solution in the chemical dosing water tank is transported to a chemical storage water tank, and the chemical storage water tank is used for chemical dosing. Compared with the prior art which only includes a storage bin and a chemical storage water tank, and the chemical storage water tank serves as both a chemical dosing device and a chemical storage device at the same time, the utility model realizes the accurate dosing of powdered activated carbon, has little dust pollution, high operation efficiency, uniform and accurate feeding, etc.

[0017] In addition, through the partitioned operation of chemical dosing and chemical storage, it is ensured that while chemical dosing is carried out, the activated carbon mixture can be continuously prepared in the chemical dosing water tank, and the concentration of chemical dosing is maintained at a set value. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a wet chemical dosing device for powdered activated carbon used in water treatment;

[0019] Figure 2 is a schematic structural diagram of a powdered activated carbon weighing device;

[0020] Figure 3 is a schematic top view of the weighing device;

[0021] In the figure: 1 - storage bin; 2 - dust collector; 3 - level switch; 4 - feed pipe; 5 - storage bin support; 6 - vibrating hopper; 7 - discharge valve; 8 - conveyor; 9 - weighing device; 10 - jet mixer; 11 - jet pump; 12 - chemical dosing water tank; 13 - chemical dosing mixer; 14 - make-up water pipe; 15 - chemical storage water tank; 16 - chemical storage mixer; 17 - chemical dosing pump; 21 - conveyor discharge pipe; 22 - load-bearing plate; 23 - weighing sensor assembly; 24 - weighing bin; 25 - exhaust device; 26 - first sealed connection pipe; 27 - weighing vibrating hopper; 28 - discharge valve; 29 - weighing device support; 30 - control valve; 31 - weighing connection part, 32 - second sealed connection pipe. Detailed Description of the Preferred Embodiment

[0022] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not used to limit the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1 to 3, A wet dosing device for powdered activated carbon used in water treatment, which includes a storage bin 1, a conveyor 8, a weighing device 9, a dosing water tank 12 and a medicine storage tank 15. An external feeder is connected to the feed inlet of the storage bin 1. The discharge outlet of the storage bin 1 is connected to the feed inlet of the weighing device 9 through the conveyor 8. The discharge outlet of the weighing device 9 is connected to the dosing water tank 12 through an injector 10. The output port of the dosing water tank 12 is connected to the water inlet of the medicine storage tank 15. The water outlet of the medicine storage tank 15 is connected to an external water treatment system through a dosing pump 17.

[0024] The storage bin 1 includes a tank body. The outer side wall of the tank body is connected to a storage bin support 5. A dust collector 2 and a feed inlet are arranged at the top of the tank body. The feed inlet at the top of the tank body serves as the feed inlet of the storage bin 1. The feed inlet at the top of the tank body is connected to the external feeder through a feed pipe 4. A valve is arranged on the feed pipe 4. Level switches 3 corresponding to different heights are respectively arranged on the inner wall of the tank body. A vibrating hopper 6 is arranged at the bottom of the tank body. A discharge valve 7 is arranged at the bottom of the vibrating hopper 6. The outlet of the discharge valve 7 serves as the discharge outlet of the storage bin 1 and is connected to the feed inlet of the conveyor 8.

[0025] In this embodiment, there are three level switches 3 at different heights, including a low-level switch, a middle-level switch and a high-level switch. When feeding from the storage bin 1 is required, the valve on the feed pipe 4 is opened, and the powdered activated carbon is fed into the storage bin 1 from the feed pipe 4 through the external feeder. When the material level in the storage bin 1 reaches the high level, the high-level switch is triggered. At this time, the feeder and the valve on the feed pipe 4 are closed. When the storage bin 1 discharges material, the discharge valve 7 is opened. When the material level in the storage bin 1 reaches the low level, the discharge valve 7 is closed, and the external feeder is started to feed. When the material level reaches the middle level, the discharge valve 7 is opened to resume discharging. In this embodiment, the level switch 3 is a tuning fork level switch. The fork body is made of 304 stainless steel. The power supply is DC24V, and the output mode is relay contact output. The valve on the feed pipe 4 is an electric ball valve with DN50, made of 304 stainless steel, and the power supply is DC24V. The discharge valve 7 is a star-shaped discharge valve. The star-shaped discharge valve is driven by a reduction motor. The reduction motor is an explosion-proof motor. The power supply of the motor is AC380V, and the impeller rotation speed of the star-shaped discharge valve is 25 - 40 r / min.

[0026] Furthermore, in this embodiment, the dust collector 2 is a pulse bag filter. The dust collector 2 includes a box body. Filter bags are arranged inside the box body. During the process that the powdered activated carbon is fed into the storage bin 1 from the feed pipe 4, part of the powdered activated carbon enters the box body of the dust collector 2 from the air inlet of the dust collector 2 along with the air flow upwards. The filter bags hold back the powdered activated carbon in the mixed gas on the outer wall of the filter bags. The purified gas is discharged through the air outlet on the box body of the dust collector 2. The dust collector 2 also includes a dust cleaning device. The dust cleaning device uses pulsed air to drop the powdered activated carbon accumulated on the outer wall of the filter bags into the tank body of the storage bin 1.

[0027] The conveyor 8 is a screw conveyor, which includes a feed inlet, a reduction motor, a housing, a support and a discharge outlet. The feed inlet of the conveyor 8 is hermetically connected to the outlet of the discharge valve 7 through a pipeline. The discharge outlet of the conveyor 8 is connected to the inlet of the conveyor discharge pipe 21 through a pipeline. A control valve 30 is provided on the pipeline between the conveyor 8 and the conveyor discharge pipe 21. The outlet of the conveyor discharge pipe 21 is inserted into the feed inlet of the weighing bin 24. In this embodiment, the conveyor discharge pipe 21 is inserted into the feed inlet of the weighing bin 24 from above the top of the weighing bin 24. The outlet of the conveyor discharge pipe 21 is movably connected to the feed inlet of the weighing bin 24 through a first sealing connection pipe 26. The outer diameter of the conveyor discharge pipe 21 is 3-5 cm smaller than the inner diameter of the feed inlet of the weighing bin 24, so that the outlet of the conveyor discharge pipe 21 can move relative to the feed inlet of the weighing bin 24, avoiding the pulling effect of the conveyor discharge pipe 21 on the weighing bin 24 during the weighing process and affecting the weighing accuracy. In this embodiment, the conveyor 8 is made of 304 stainless steel. The screw conveyor is driven and controlled by a reduction motor, and the power supply of the motor is AC220V. The reduction motor is an explosion-proof motor, and the rotation speed of the screw conveyor is 50-100 r / min. To ensure that the powdered activated carbon in the weighing bin 24 does not diffuse outward and the air pressure in the weighing bin 24 is stable, the weighing bin 24 is a sealed cabin, and an exhaust device 25 is provided on the top of the weighing bin 24.

[0028] In this embodiment, when the storage bin 1 discharges materials, first start the motor of the vibrating hopper 6, then start the discharge valve 7, and finally start the reduction motor and the control valve 30 of the conveyor 8. The conveyor 8 transports the powdered activated carbon to the weighing device 9.

[0029] The weighing device 9 includes a weighing sensor assembly 23, a weighing device support 29 and a weighing bin 24. The top of the weighing bin 24 is connected to the load-bearing plate 22 through a weighing connection part 31. A weighing sensor assembly 23 is provided between the load-bearing plate 22 and the top of the weighing device support 29. When the powdered activated carbon falls from the conveyor discharge pipe 21 into the weighing bin 24, the force is transmitted to the load-bearing plate 22 through the weighing connection part 31 for weighing. In this embodiment, to make the force on the weighing sensor assembly 23 more uniform, the weighing sensor assembly 23 includes a weighing flat plate with an opening at the center. The conveyor discharge pipe 21 passes through the central opening of the weighing flat plate from bottom to top and is connected to the discharge outlet of the conveyor 8. The weighing connection part 31 passes through the central opening of the weighing flat plate and is connected to the load-bearing plate 22. The load-bearing plate 22 is located on the weighing flat plate. A plurality of weighing sensors are provided between the weighing flat plate and the top of the weighing device support 29, and the weighing sensors are connected to the weighing device support 29 through a bottom support platform.

[0030] A weighing hopper 27 is provided at the bottom of the weighing bin 24, and a discharge valve 28 is provided at the bottom of the weighing hopper 27. The outlet of the discharge valve 28 serves as the discharge port of the weighing device 9. The outlet of the discharge valve 28 is movably connected to the powder suction inlet pipe of the ejector 10 through a second sealed connecting pipe 32. In this embodiment, the second sealed connecting pipe 32 is a flexible connecting pipe, enabling the outlet of the discharge valve 28 to move relative to the powder suction inlet pipe of the ejector 10, thus preventing the powder suction inlet pipe of the ejector 10 from pulling on the weighing bin 24 during weighing and affecting the weighing accuracy. The water inlet of the ejector 10 is connected to the water outlet of the jet pump 11. The water inlet of the jet pump 11 is connected to the water outlet of the medicine preparation water tank 12 through a pipe. The water outlet of the ejector 10 is connected to the return port of the medicine preparation water tank 12 through a pipe. In this embodiment, the water outlet of the ejector 10 is connected to the top opening of the medicine preparation water tank 12.

[0031] The effective range of the weighing device 9 is 0 - 500 kg, and the weighing accuracy is 0.01 kg. Among them, powdered activated carbon enters the weighing bin 24 from the conveyor discharge pipe 21 and then continues to fall into the weighing hopper 27. After the powdered activated carbon fills the weighing hopper 27, it will continue to rise. Therefore, the weighing structure includes the weighing hopper 27 and the weighing bin 24. The powder suction inlet of the ejector 10 forms a negative pressure, which can play a role in transporting the powdered activated carbon, prevent the powdered activated carbon from forming dust, and also play a role in rapid mixing. In this embodiment, the weighing sensor in the weighing sensing assembly 23 is a planar pressure force sensor, the power supply is DC24V, and the output mode is a 4 - 20 mA analog signal; the control component of the weighing hopper 27 is a vibration motor, the power supply of the vibration motor is AC220V, and the power is 30W - 100W; the discharge valve 28 is a stainless steel electric ball valve, which is driven and controlled by an electric actuator. The power supply of the electric actuator is DC24V, and the diameter of the discharge valve 28 is DN50.

[0032] In this embodiment, when the wet dosing device for powdered activated carbon is in operation, the weighing value of the weighing device 9 is first cleared. The conveyor 8 transports the powdered activated carbon into the weighing device 9. When the weight of the powdered activated carbon reaches the set value, the motors of the conveyor 8, the discharge valve 7, and the vibrating hopper 6 are turned off. The dosing water tank 12 starts to fill with water. After the dosing water tank 12 finishes filling with water, the weighing vibrating hopper 27 at the bottom of the weighing device 9 and the discharge valve 28 are opened, and the jet pump 11 is started. The jet pump 11 pumps water from the dosing water tank 12 to the injector 10, and the injector 10 sucks the powdered activated carbon into the water conveyed by the jet pump 11 for mixing. The mixed solution is transported into the dosing water tank 12. When the weighing data of the weighing device 9 reaches 0, the jet pump 11 continues to operate for 10 minutes and then is turned off. The jet pump 11 continues to operate for a period of time. On the one hand, it fully mixes the dust generated by the powdered activated carbon with water, and on the other hand, it accelerates the rapid and uniform mixing of the powdered activated carbon in water with water.

[0033] The dosing water tank 12 is installed on the dosing water tank support. The height of the outlet of the dosing water tank 12 is greater than the height of the inlet of the medicine storage tank 15, so that the powdered activated carbon solution in the dosing water tank 12 flows into the medicine storage tank 15 under the action of gravity. In this embodiment, the height of the outlet of the dosing water tank 12 is 0.5 - 1.0 m greater than the top height of the medicine storage tank 15. The inlet of the medicine storage tank 15 is arranged at the upper part of the side wall of the medicine storage tank 15. To effectively utilize the powdered activated carbon solution in the dosing water tank 12, the outlet of the dosing water tank 12 is arranged at the bottom of the dosing water tank 12. A dosing mixer 13 and a liquid level sensor are installed in the dosing water tank 12; the water replenishing port of the dosing water tank 12 is connected to an external water source through a water replenishing pipe 14. In this embodiment, the water replenishing port of the dosing water tank 12 is the open top of the dosing water tank 12; the outlet of the dosing water tank 12 is connected to the inlet of the jet pump 11 through a pipeline, the outlet of the jet pump 11 is connected to the inlet of the injector 10 through a pipeline, and the outlet of the injector 10 is connected to the return port of the dosing water tank 12 through a pipeline. In this embodiment, the outlet of the dosing water tank 12 is located at the bottom of the dosing water tank 12, and the return port of the dosing water tank 12 is the open top of the dosing water tank 12. The flow rate of the jet pump 11 is 30 - 50 m 3 / h, the head is 20 - 30 m, the effective volume of the dosing water tank 12 is 10 m 3 , and the rotation speed of the dosing mixer 13 is 60 - 120 r / min.

[0034] In this embodiment, after the weighing device 9 finishes weighing, the dosing water tank 12 starts to fill with water. Water is replenished into the dosing water tank 12 through the make-up water pipe 14. According to the weight of the powdered activated carbon weighed by the weighing device 9 and the preset preparation concentration of the powdered activated carbon, the set liquid level height required in the dosing water tank 12 is calculated. The liquid level sensor in the dosing water tank 12 is used to detect whether the water level in the dosing water tank 12 reaches the set liquid level height. When the liquid level in the dosing water tank 12 reaches the set liquid level height, the water replenishment is stopped, and the jet pump 11 is started, and at the same time, the dosing mixer 13 is started. In this embodiment, a solenoid valve is installed on the make-up water pipe 14. The material of the solenoid valve is 304 stainless steel, and the power supply is DC24V. The water replenishment of the make-up water pipe 14 is controlled by controlling the solenoid valve.

[0035] Further, in this embodiment, the preset preparation concentration of the powdered activated carbon is 5-10%.

[0036] A storage medicine mixer 16 and a liquid level sensor are installed inside the medicine storage tank 15. The outlet of the medicine storage tank 15 is connected to a dosing pump 17. The dosing pump 17 adopts a diaphragm pump or a screw pump. A plurality of medicine storage tanks 15 are provided. In this embodiment, 2 medicine storage tanks 15 are provided. Each medicine storage tank 15 is provided with a storage medicine mixer 16 and a liquid level sensor. The outlet of each medicine storage tank 15 is connected to the dosing pump 17 through an outlet valve on the corresponding branch. Each medicine storage tank 15 is connected to the bottom outlet of the dosing water tank 12 through a drain valve on the corresponding branch. The effective volume of the medicine storage tank 15 is 10m 3 , and the rotation speed of the storage medicine mixer 16 is 60-70 r / min. In this embodiment, the control component of the storage medicine mixer 16 is a reduction motor. The reduction motor adopts an explosion-proof motor, and the power supply of the motor is AC380V. The liquid level sensor adopts an ultrasonic liquid level gauge with a range of 0-5m, an output mode of 4-20mA signal, and a power supply of DC24V.

[0037] In this embodiment, when the dosing of the dosing water tank 12 is completed, the drain valve at the bottom of the dosing water tank 12 is started to discharge the powdered activated carbon solution into the medicine storage tank 15, and the storage medicine mixer 16 is started. When it is necessary to add medicine to the water treatment system, the dosing pump 17 is started. If it is monitored by the liquid level sensor that when the medicine storage tank 15 reaches the low liquid level, it is switched to another medicine storage tank 15 with sufficient powdered activated carbon solution, and at the same time, the preparation of the powdered activated carbon solution is started again. After the dosing is completed, the powdered activated carbon solution is discharged into the medicine storage tank 15 with the low liquid level. In this embodiment, the dosing pump 17 is controlled to start and stop by a motor. The motor of the dosing pump 17 adopts an explosion-proof motor, and the power supply of the motor is AC380V; the liquid level refers to the liquid level related to the ultrasonic liquid level gauge in the medicine storage tank 15. When the medicine storage tank 15 reaches the low liquid level, the outlet valve corresponding to the medicine storage tank 15 with the low liquid level is closed, and the outlet valve corresponding to another medicine storage tank 15 with sufficient powdered activated carbon solution is started.

[0038] The working principle of this embodiment is as follows:

[0039] During specific operation, powdered activated carbon is transported to the storage bin 1 by an external feeder. The powdered activated carbon in the storage bin 1 is transported to the weighing device 9 by the conveyor 8. According to the formulated concentration and demand of the powdered activated carbon, the set mass of the powdered activated carbon is calculated, so as to control the conveyor 8 to transport the powdered activated carbon to the weighing device 9. When the powdered activated carbon reaches the set mass, the transportation of the powdered activated carbon is stopped. At the same time, the amount of water for preparing the medicine is calculated based on the actual mass of the powdered activated carbon and the preset formulated concentration, and the required set liquid level height in the medicine preparation water tank 12 is calculated according to the effective area of the medicine preparation water tank 12. The medicine preparation water is fed into the medicine preparation water tank 12 through the water replenishing pipe 14. When the medicine preparation water tank 12 reaches the set liquid level height, the water replenishment is stopped. The powdered activated carbon is sucked into the ejector 10 by the jet pump 11. The powdered activated carbon is strongly mixed with water in the ejector 10, and the mixing and stirring are continued in the medicine preparation water tank 12 by the medicine preparation stirrer 13. The mixed powdered activated carbon solution is discharged into the medicine storage tank 15, and then the powdered activated carbon solution is sent into the external water treatment system through the dosing pump 17. After the powdered activated carbon solution in the medicine storage tank 15 is used up, it is switched to another medicine storage tank 15 to continue transporting the powdered activated carbon solution, and at the same time, the preparation of the powdered activated carbon solution is started again. After the medicine preparation is completed, the powdered activated carbon solution is discharged to the medicine storage tank 15 with a low liquid level. In this way, the process of continuous and stable quantitative medicine preparation and dosing is finally realized.

[0040] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A wet dosing device for powdered activated carbon for water treatment, comprising a storage bin (1), characterized in that: The external loading machine is connected to the feed port of the storage bin (1), the discharge port of the storage bin (1) is connected to the feed port of the weighing device (9) through a conveyor (8), the discharge port of the weighing device (9) is connected to the medicine dispensing water tank (12) through an ejector (10), the output port of the medicine dispensing water tank (12) is connected to the water inlet of the medicine storage water tank (15), and the water outlet of the medicine storage water tank (15) is connected to the external water treatment system through a dosing pump (17).

2. A powdered activated carbon wet dosing device for water treatment according to claim 1, characterized in that: The storage bin (1) comprises a tank body, a dust collector (2) and a feed port are arranged on the top of the tank body, the feed port on the top of the tank body serves as the feed port of the storage bin (1), the feed port on the top of the tank body is connected to an external feeder via a feed pipe (4), a valve is arranged on the feed pipe (4), corresponding material level switches (3) are arranged at different heights on the inner wall of the tank body, a vibrating hopper (6) is arranged at the bottom of the tank body, a discharge valve (7) is arranged at the bottom of the vibrating hopper (6), and the outlet of the discharge valve (7) serves as the discharge port of the storage bin (1) and is connected to the feed port of a conveyor (8).

3. A powdered activated carbon wet dosing device for water treatment according to claim 1, characterized in that: The conveyor (8) comprises a discharge port, the discharge port of the conveyor (8) is connected to the inlet of a conveyor discharge pipe (21) through a pipeline, the outlet of the conveyor discharge pipe (21) is inserted into the feed port of a weighing bin (24) of a weighing device (9), the outlet of the conveyor discharge pipe (21) and the feed port of the weighing bin (24) are relatively movable, and the feed port of the weighing bin (24) serves as the feed port of the weighing device (9); the top of the weighing bin (24) is connected to a bearing plate (22) through a weighing connection part (31), and a weighing sensor assembly (23) is arranged between the bearing plate (22) and the top of a weighing device bracket (29).

4. A powdered activated carbon wet dosing device for water treatment according to claim 3, characterized in that: A weighing vibration hopper (27) is arranged at the bottom of the weighing silo (24), and a discharge valve (28) is arranged at the bottom of the weighing vibration hopper (27). The outlet of the discharge valve (28) is used as the discharge port of the weighing device (9) and is movably connected to the powder suction port pipeline of the ejector (10). The water inlet of the ejector (10) is connected to the water outlet of the ejector pump (11), the water inlet of the jet pump (11) is connected to the water outlet of the dispensing water tank (12), and the water outlet of the ejector (10) is connected to the reflux port of the dispensing water tank (12).

5. A powdered activated carbon wet dosing device for water treatment according to claim 4, characterized in that: The outlet of the conveyor discharge pipe (21) is movably connected to the feed port of the weighing bin (24) through a first sealed connecting pipe (26), and the outlet of the discharge valve (28) is movably connected to the powder suction port pipeline of the ejector (10) through a second sealed connecting pipe (32).

6. A powdered activated carbon wet dosing device for water treatment according to claim 3, characterized in that: A control valve (30) is provided on the pipeline between the conveyor (8) and the conveyor discharge pipe (21).

7. A powdered activated carbon wet dosing device for water treatment according to claim 1, characterized in that: A medicine dispensing mixer (13) and a liquid level sensor are installed in the medicine dispensing water tank (12), and a water supply port of the medicine dispensing water tank (12) is connected to an external water source via a water supply pipe (14).

8. The wet dosing device for powdered activated carbon for water treatment according to claim 1, characterized in that: There are a plurality of medicine storage water tanks (15), each of which is provided with a medicine storage mixer (16) and a liquid level sensor, the water outlet of each medicine storage water tank (15) is connected to a medicine adding pump (17) via a corresponding water outlet valve, the outlet height of the medicine dispensing water tank (12) is greater than the water inlet height of the medicine storage water tank (15), and each medicine storage water tank (15) is connected to the outlet of the medicine dispensing water tank (12) via a drain valve.

9. A powdered activated carbon wet dosing device for water treatment according to claim 3, characterized in that: The weighing sensor assembly (23) comprises a weighing plate, the center of which is an opening, a conveyor discharge pipe (21) passes through the center opening of the weighing plate from bottom to top and is connected to the discharge port of the conveyor (8), a weighing connection part (31) passes through the center opening of the weighing plate and is connected to the bearing plate (22), the bearing plate (22) is located on the weighing plate, and a plurality of weighing sensors are arranged between the weighing plate and the top of the weighing device bracket (29).

10. A powdered activated carbon wet dosing device for water treatment according to claim 3, characterized in that: The weighing silo (24) is a sealed cabin, and an exhaust device (25) is arranged on the top of the weighing silo (24).

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