Dosing pipeline system of sewage plant

Abstract

The utility model provides a dosing pipeline system for a sewage plant, which is characterized in that a cleaning agent is pumped into a third pipeline through a diaphragm metering pump, mixed with water pumped into the third pipeline from a water supply end by a booster pump and then injected into a first pipeline; the inner walls of the first pipeline, the water suction pump and the second pipeline of the first pipeline unit and the second pipeline unit are cleaned under the action of the cleaning fluid, and wastewater is discharged from a fourth pipeline, so that the phenomenon of pipeline blockage caused by deposition of chemicals and accumulation of impurities in the pipelines is avoided, the service life of the pipelines is prolonged, and the production cost is reduced. The expenditure for maintaining and replacing the pipeline is reduced, and the use cost of the pipeline is reduced. And meanwhile, the difference value of the PH value of the inlet water and the PH value of the outlet water during cleaning can be obtained according to the PH detection values of the first PH probe arranged at the water supply end and the second PH probe arranged on the fourth pipeline, so that the pipeline cleaning effect is judged, the number of times of unnecessary cleaning of the pipeline is reduced, and the pipeline cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment plant dosing pipeline system. Background Art

[0002] Sewage contains various pollutants, such as organic matter, suspended solids, grease, heavy metal ions, nitrogen, phosphorus, etc.; and during the sewage treatment process, the sewage quality is affected by various factors, such as temperature, pH value, dissolved oxygen content, etc. Therefore, in sewage treatment, dosing pipelines will be laid to various sewage treatment pools, such as biochemical pools, filter pools and disinfection pools, to add chemicals to regulate the water quality while removing pollutants in the sewage, thereby improving the efficiency and quality of sewage treatment.

[0003] However, during use, dosing lines are prone to clogging due to the deposition of chemicals and the accumulation of impurities. If the dosing line is blocked or not smooth, not only will the chemicals not be evenly and accurately added to the sewage, thus affecting the dosing effect, but it will also lead to pipeline aging and rupture, shortening the service life of the pipeline. Dirt and impurities in the pipeline may also cause secondary pollution to the water quality, making it difficult to ensure the safety and hygiene of the effluent quality.

[0004] Therefore, it is necessary to use a sewage treatment plant dosing pipeline system with good cleaning function to clean the dosing pipeline regularly. Utility Model Content

[0005] Aiming at the technical problem in the prior art that during the water treatment process, the dosing pipeline is prone to clogging due to the deposition of chemicals and the accumulation of impurities during use, the utility model provides a sewage treatment plant dosing pipeline system with good cleaning function.

[0006] A sewage treatment plant dosing pipeline system includes an aluminum sulfate chemical storage tank and a sodium hypochlorite chemical storage tank, wherein the aluminum sulfate chemical storage tank is connected to a CASS tank through a first pipeline unit; the sodium hypochlorite chemical storage tank is connected to the CASS tank or a filter tank through a second pipeline unit; the first pipeline unit and the second pipeline unit have the same structure; and the first pipeline unit includes a first pipeline, a water pump, a second pipeline, a third pipeline connected to the first pipeline, and a fourth pipeline connected to the second pipeline in sequence; the other end of the first pipeline of the first pipeline unit is connected to the drug outlet of the aluminum sulfate chemical storage tank, and the second pipeline is connected to the dosing port of the CASS tank; the other end of the first pipeline of the second pipeline unit is connected to the drug outlet of the sodium hypochlorite chemical storage tank The first pipeline unit and the second pipeline unit are connected to the dosing port, and the second pipeline is connected to the dosing port of the CASS tank and the filter tank respectively; the other end of the third pipeline of the first pipeline unit and the second pipeline unit is connected to a water supply end, and the water supply end is provided with a first PH probe for detecting the PH value of the water source at the water supply end; the other end of the fourth pipeline of the first pipeline unit and the second pipeline unit is connected to a wastewater tank; the fourth pipeline is used to discharge the fluid in the pipeline, and the fourth pipeline is provided with a second PH probe for detecting the PH value of the fluid in the fourth pipeline; a booster pump is provided on the third pipeline, and the third pipeline is connected to a cleaning agent storage tank through an injection pipe; a diaphragm metering pump is provided on the injection pipe, and a first electromagnetic flowmeter is provided on the end of the third pipeline close to the booster pump and on the injection pipe.

[0007] Furthermore, each of the first pipeline, the third pipeline, the second pipeline, the fourth pipeline and the injection pipe is provided with a first solenoid valve.

[0008] Furthermore, a second electromagnetic flowmeter is provided on each of the second pipelines.

[0009] Furthermore, a pulse damper and a check valve are sequentially provided on the second pipeline.

[0010] Furthermore, a diaphragm pressure gauge is provided on the second pipeline between the pulse dampener and the check valve; an exhaust valve and a safety valve are provided in sequence on the second pipeline on the side of the check valve away from the pulse dampener.

[0011] Furthermore, the water supply end is a water tank or a tap water supply device; the water pump is a single screw pump; and the liquid level meter is a magnetic flap liquid level meter.

[0012] Furthermore, the second pipeline of the first pipeline unit is connected to the second pipeline of the second pipeline unit through a fifth pipeline, and a manual valve is provided on the fifth pipeline.

[0013] Furthermore, the top of the aluminum sulfate agent storage tank and the sodium hypochlorite agent storage tank are each provided with a water supply pipe connected to the third pipeline and a liquid supply pipe for adding water purification agent, and the water supply pipe and the liquid supply pipe are each provided with a second solenoid valve, and the liquid supply pipe is each provided with a second solenoid valve and a third electromagnetic flowmeter.

[0014] Furthermore, a stirring motor is provided on the top of the aluminum sulfate agent storage tank, the sodium hypochlorite agent storage tank and the cleaning agent storage tank, and a stirring blade is provided at the bottom of the stirring motor, and the stirring blade is inserted into the corresponding aluminum sulfate agent storage tank and the sodium hypochlorite agent storage tank or the cleaning agent storage tank.

[0015] Furthermore, a liquid level gauge is provided in each of the aluminum sulfate agent storage tank, the sodium hypochlorite agent storage tank and the cleaning agent storage tank.

[0016] Furthermore, a drainage outlet is provided at the bottom of each of the aluminum sulfate agent storage tank and the sodium hypochlorite agent storage tank.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a sewage treatment plant dosing pipeline system, wherein a cleaning agent is pumped into the third pipeline through a diaphragm metering pump, mixed with water pumped into the third pipeline from the water supply end by a booster pump, and then injected into the first pipeline. Under the action of the cleaning liquid, the first pipeline, the water pump, and the inner wall of the second pipeline of the first pipeline unit and the second pipeline unit are cleaned, and the wastewater is discharged from the fourth pipeline, thereby avoiding the deposition of agents and the accumulation of impurities inside the pipeline that cause the pipeline to become clogged, which is beneficial to extending the service life of the pipeline, reducing the expenses for maintenance and replacement of the pipeline, and reducing the cost of using the pipeline. At the same time, by measuring the pH values ​​of the first pH probe set at the water supply end and the second pH probe set at the fourth pipeline, the difference between the pH values ​​of the incoming water and the outgoing water during cleaning can be obtained, thereby judging the pipeline cleaning effect, reducing the number of unnecessary pipeline cleanings, and improving the efficiency of pipeline cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a sewage treatment plant dosing pipeline system provided by the utility model.

[0019] Figure 2 This is a structural schematic diagram of an aluminum sulfate agent storage tank and a sodium hypochlorite agent storage tank provided by the utility model.

[0020] 1. Aluminum sulfate reagent storage tank; 101. Water supply pipe; 102. Liquid supply pipe; 104. Drain outlet; 105. Second solenoid valve; 2. Sodium hypochlorite reagent storage tank; 3. CASS pool; 4. Filter tank; 5. First pipeline; 6. Suction pump; 7. Second pipeline; 8. Third pipeline; 9. Fourth pipeline; 91. Second pH probe; 10. Water supply end; 101. First pH probe; 11. Booster pump; 12. Liquid injection pipe; 13. Cleaning reagent storage tank; 14. Diaphragm metering pump; 15. First electromagnetic flowmeter; 16. First solenoid valve; 17. Second electromagnetic flowmeter; 18. Pulsation dampener; 19. Check valve; 20. Diaphragm pressure gauge; 21. Exhaust valve; 22. Safety valve; 23. Fifth pipeline; 231. Manual valve; 24. Liquid level gauge; 25. Stirring motor; 26. Stirring blade DETAILED DESCRIPTION

[0021] To further explain the present invention in detail, the following description is provided with reference to the accompanying drawings. It should be noted that the embodiments described below are only a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0022] refer to Figure 1 and Figure 2 Figure 1 shows a sewage treatment plant dosing pipeline system, which can control the operation of various electronic control components through a control device. The system includes an aluminum sulfate reagent storage tank 1 and a sodium hypochlorite reagent storage tank 2. The aluminum sulfate reagent storage tank 1 is connected to a CASS tank 3 via a first pipeline unit (not shown); the sodium hypochlorite reagent storage tank 2 is connected to the CASS tank 3 or a filter tank 4 via a second pipeline unit (not shown).

[0023] Specifically, the first pipeline unit and the second pipeline unit have the same structure; the first pipeline unit includes a first pipeline 5, a water pump 6, a second pipeline 7, a third pipeline 8 connected to the first pipeline 5, and a fourth pipeline 9 connected to the second pipeline 7, which are sequentially connected; the other end of the first pipeline 5 of the first pipeline unit is connected to the drug outlet of the aluminum sulfate chemical storage tank 1, and the second pipeline 7 is connected to the drug addition port of the CASS tank 3. The other end of the first pipeline 5 of the second pipeline unit is connected to the drug outlet of the sodium hypochlorite chemical storage tank 2, and the second pipeline 7 is connected to the drug addition ports of the CASS tank 3 and the filter tank 4, respectively.

[0024] The other ends of the third pipelines 8 of the first and second pipeline units are both connected to a water supply end 10, and the water supply end 10 is provided with a first pH probe 101 for detecting the pH value of the water source at the water supply end 10. The water supply end 10 is a water tank or a tap water supply device. In actual applications, when the water source in the water tank is insufficient, the tap water supply device is activated as a water source supplement; the water pump 6 is a single-screw pump. In this embodiment, the second pipeline 7 of the first pipeline unit and the second pipeline 7 of the second pipeline unit are the same pipeline, which is connected to the first pipeline 5 of the first pipeline unit and the first pipeline 5 of the second pipeline unit respectively through a solenoid valve.

[0025] After the aluminum sulfate agent storage tank 1 and the sodium hypochlorite agent storage tank 2 are put into the first pipeline 5 through the drug outlet, the aluminum sulfate agent or the sodium hypochlorite agent is mixed with the water pumped into the water supply end 10 from the third pipeline 8 in the first pipeline 5 to form a drug solution, which is then pumped by the water pump 7 and sent to the corresponding CASS pool 3 or filter pool 4 through the second pipeline 7.

[0026] The other ends of the fourth pipelines 9 of the first and second pipeline units are both connected to a wastewater tank (not shown); the fourth pipeline 9 is used to discharge the fluid within the pipeline and is equipped with a second pH probe 91 for detecting the pH value of the fluid within the fourth pipeline 9. A booster pump 11 is installed on each of the third pipelines 8, which is connected to a cleaning agent storage tank 13 via an injection pipe 12; a diaphragm metering pump 14 is installed on the injection pipe 12, and a first electromagnetic flowmeter 15 is installed on both the end of the third pipeline 8 near the booster pump 11 and the injection pipe 12.

[0027] A first solenoid valve 16 is provided on each of the first pipeline 5, the second pipeline 7, the third pipeline 8, the fourth pipeline 9, and the injection pipe 12. In this embodiment, the first solenoid valve 16 of the first pipeline 5 is located on the first pipeline 5 on the side of the connection point between the first pipeline 5 and the third pipeline 8, close to the aluminum sulfate reagent storage tank 1 or the sodium hypochlorite reagent storage tank 2; the first solenoid valve 16 of the second pipeline 7 is located on the second pipeline 7 on the side of the second pipeline 7 close to the CASS tank 3 or the filter tank 4, and away from the fourth pipeline 9; the first solenoid valve 16 of the third pipeline 8 is located on the third pipeline 8 on the side close to the water supply end 10 and away from the third pipeline 8, the water supply pipe 101, the second pipeline 7, and the injection pipe 12; and the first solenoid valve 16 of the fourth pipeline 9 is located on the fourth pipeline 9 on the side away from the connection point between the fourth pipeline 9 and the second pipeline 7.

[0028] The tops of the aluminum sulfate and sodium hypochlorite tanks 1 and 2 are each further provided with a water supply pipe 101 connected to the third pipeline 8, as well as a liquid supply pipe 102 for adding water purification agents. In this embodiment, the bottoms of the aluminum sulfate and sodium hypochlorite tanks 1 and 2 are further provided with a drain outlet 104. Both the water supply pipe 101 and the liquid supply pipe 102 are provided with a second solenoid valve 105. The water supply pipe 102 is connected to the end of the third pipeline 7 remote from the booster pump 11 and the first solenoid valve 16. Each liquid supply pipe 102 is further provided with a third electromagnetic flowmeter 103.

[0029] When it is necessary to clean the inside of the aluminum sulfate agent storage tank 1 and the sodium hypochlorite agent storage tank 2, the second solenoid valve 105 on the water supply pipe 101 is opened, and water with a certain water supply pressure is pumped from the water supply end 10 by the booster pump 11 into the aluminum sulfate agent storage tank 1 and the sodium hypochlorite agent storage tank 2 to clean their inner walls; after cleaning is completed, the cleaning liquid is discharged through the drain port 104 or discharged into the first pipeline 5 to clean the inside of the pipeline.

[0030] In this embodiment, the first electromagnetic flowmeter 15 of the third pipeline 8 is disposed on the third pipeline 8 near the water supply end 10 and away from the third pipeline 8, the water supply pipe 101, the second pipeline 7, and the liquid injection pipe 12. By disposing the first electromagnetic flowmeter 15 on the third pipeline 8, the water inflow to the water supply end 10 can be controlled. In conjunction with the second electromagnetic valve 105 on the water supply pipe 101 and the liquid supply pipe 102, and the third electromagnetic flowmeter 103 on the liquid supply pipe 102, the ratio of the water and liquid inflow into the aluminum sulfate reagent storage tank 1 or the sodium hypochlorite reagent storage tank 2 can be controlled. After a certain amount of reagent or water is added, the second electromagnetic valve 105 is closed to achieve quantitative fluid input.

[0031] Specifically, the cleaning process of the sewage treatment plant dosing pipeline system is as follows: when only simple cleaning of the inside of the pipeline is required, the first solenoid valve 16 on the first pipeline 5, the second pipeline 7 and the injection pipe 12 is closed, and the first solenoid valve 16 on the third pipeline 8 and the fourth pipeline 9 is opened. The water from the water supply end 10 is flushed into the corresponding pipeline unit third pipeline 8 at a certain water pressure through the booster pump 11, and flows through the first pipeline 5, the second pipeline 7 and the fourth pipeline 9 in turn to flush the inner wall of the pipeline, and then discharged to the outside through the fourth pipeline 9 after flushing.

[0032] The first solenoid valve 16 on the second pipeline 7, the third pipeline 8 and the injection pipe 12 can also be closed, and the first solenoid valve 16 on the first pipeline 5 and the fourth pipeline 9 can be opened. The water from the water supply end 10 can be flowed from the aluminum sulfate agent storage tank 1 and the sodium hypochlorite agent storage tank 2 through the corresponding first pipeline 5, the second pipeline 7 and the fourth pipeline 9 at a certain water pressure through the booster pump 11 to flush the inner wall of the pipeline. After flushing, the water is discharged to the outside through the fourth pipeline 9.

[0033] When deep cleaning of the inside of the pipeline is required, first, close the first solenoid valve 16 on the first pipeline 5, the second pipeline 7 and the fourth pipeline 9, open the third pipeline 8 and the first solenoid valve 16 of the injection pipe 12, and use the booster pump 11 to flush the water from the water supply end 10 into the third pipeline 8 at a certain water pressure, and flow through the first pipeline 5, the second pipeline 7 and the fourth pipeline 9 in turn; when the first electromagnetic flowmeter 15 on the third pipeline 8 detects that the amount of water entering the third pipeline 8 reaches a preset value, the booster pump 11 and the first solenoid valve 16 on the third pipeline 8 are closed.

[0034] At the same time, the diaphragm metering pump 14 delivers the cleaning solution through the injection pipe 12 into the third pipeline 8, where it then flows into the other pipelines. As the cleaning solution passes through the injection pipe 12, the first electromagnetic flowmeter 11 on the injection pipe 12 monitors its flow rate in real time and converts the measurement results into electrical signals, which are then transmitted to the control system. Upon receiving the electrical signal from the first electromagnetic flowmeter 11 on the injection pipe 12, the control system processes and analyzes the data to determine whether the current cleaning solution flow rate meets the set requirements. Based on the data processing results, the control system adjusts the diaphragm metering pump's delivery rate to achieve precise control of the cleaning solution flow rate. If the current flow rate is lower than the set value, the control system will increase the delivery rate of the diaphragm metering pump 14; if the current flow rate is higher than the set value, the delivery rate will be reduced until the cleaning agent storage tank 13 injects a preset amount of cleaning agent into the third pipeline 8 through the injection pipe 12, and then close the diaphragm metering pump 14 and the first solenoid valve 16 on the injection pipe 12, thereby achieving accurate delivery of the cleaning agent amount, and the preset cleaning agent amount matches the preset value of the water volume in the third pipeline 8.

[0035] Finally, the cleaning agent mixes with the water in each pipeline of the pump body, reacting with the dirt and agent residue on the inner walls of each pipeline, and dissolving in the water. After a period of stagnant time, the agent and the dirt in the pipelines have fully reacted. At this time, the first solenoid valve 16 on the fourth pipeline 9 is opened to remove the reacted liquid. The first solenoid valves 16 of the third and fourth pipelines 8 and 9 are also opened. The booster pump 11 flushes water from the water supply end 10 at a certain water pressure into the third pipeline 8. The water then flows through the first pipeline 5, the second pipeline 7, and the fourth pipeline 9 in sequence, flushing the residual liquid on the inner walls of the pipelines. After flushing, it is discharged to the outside through the fourth pipeline 9.

[0036] The pH value of the last outflowing water is detected by the second pH probe 91, and the pH value detected by the first pH probe 101 is compared with the pH value detected by the second pH probe 91. If the difference between the two is within the preset normal range, it proves that the pH value of the inlet and outlet water is not affected by the pipeline environment, and the deep cleaning of the pipeline is completed; if the pH difference is too large, flushing is performed again to avoid unnecessary multiple flushing or incomplete flushing, thereby improving flushing efficiency.

[0037] The second pipeline 7 is provided with a second electromagnetic flowmeter 17. The flow rate of the reagent injected into the CASS pool 3 or the filter tank 4 can be obtained through the first electromagnetic valve 16 of the second pipeline 7 and the second electromagnetic flowmeter 17. When the injection is completed, the first electromagnetic valve 16 of the second pipeline 7 is closed.

[0038] Preferably, a pulse dampener 18 and a check valve 19 are further provided in sequence on the second pipeline 7. A diaphragm pressure gauge 20 is further provided on the second pipeline 7 between the pulse dampener 18 and the check valve 19; an exhaust valve 21 and a safety valve 22 are further provided in sequence on the second pipeline 7 on the side of the check valve 19 away from the pulse dampener 18.

[0039] The pulse dampener 18 is used to smooth the pulses and vibrations of the pharmaceutical solution pumped into the second pipeline 7 by the water pump 5, ensuring the smooth flow of the pharmaceutical solution, helping to reduce wear and leakage risks on the second pipeline 7, and protecting the equipment on the second pipeline 7 through which the solution flows. A diaphragm pressure gauge 20 is installed between the pulse dampener 18 and the check valve 19 to monitor the pressure within the pipeline in real time. When the pressure is high, the exhaust valve 21 can be controlled to open, conveniently exhausting the air in the pipeline and preventing system instability or damage caused by air accumulation. When the pressure exceeds the specified range, the safety valve 22 automatically opens, releasing some of the pressure to ensure safe operation of the system.

[0040] Preferably, the second pipeline 7 of the first pipeline unit is connected to the second pipeline 7 of the second pipeline unit through a fifth pipeline 23, and the fifth pipeline 23 is provided with a manual valve 231. In actual use, the manual valve 231 can be opened to allow the aluminum sulfate reagent to enter the corresponding CASS tank 2 via the pipeline of the second pipeline unit.

[0041] The injection pipe 203 is further provided with a branch pipe (not shown); the branch pipe is connected to the aluminum sulfate agent storage tank 1 and the sodium hypochlorite agent storage tank 2, respectively, and is equipped with a solenoid valve. Through the provision of this branch pipe, a cleaning agent can be injected into the aluminum sulfate agent storage tank 1 and the sodium hypochlorite agent storage tank 2, thereby assisting in cleaning the inner walls of the aluminum sulfate agent storage tank 1 and the sodium hypochlorite agent storage tank 2.

[0042] Each of the aluminum sulfate agent storage tank 1, the sodium hypochlorite agent storage tank 2, and the cleaning agent storage tank 13 is equipped with a liquid level gauge 24. In this embodiment, the liquid level gauge is a magnetic flap level gauge. The installation of the liquid level gauge 24 allows for both controlling the amount of agent delivered and monitoring the agent usage within the tanks in real time, enabling timely replenishment.

[0043] The aluminum sulfate agent storage tank 1, the sodium hypochlorite agent storage tank 2, and the cleaning agent storage tank 13 are each provided with a stirring motor 25 at the top, and a stirring blade 26 at the bottom of the stirring motor 25. The stirring blade 26 is inserted into the corresponding aluminum sulfate agent storage tank 1, the sodium hypochlorite agent storage tank 2, or the cleaning agent storage tank 13. The provision of the stirring motor 25 and the stirring blade 26 can prevent the agent from forming precipitation, stratification, or agglomeration in the storage tank, thereby ensuring the uniformity of the agent; and can also accelerate the flow of water when cleaning the interior of the aluminum sulfate agent storage tank and the sodium hypochlorite agent storage tank 1, thereby improving the rinsing speed and quality.

[0044] The utility model provides a sewage treatment plant dosing pipeline system, which injects water with sufficient water pressure into the aluminum sulfate agent storage tank and the sodium hypochlorite agent storage tank through the booster pump 11 on the water supply pipe 101; and pumps a cleaning agent into the third pipeline 8 through the diaphragm metering pump 14, and mixes the water with sufficient water pressure pumped into the third pipeline 8 by the booster pump 11 from the water supply end 10, and then injects the water into the first pipeline 5. The system can clean the inner walls of the aluminum sulfate agent storage tank 1, the sodium hypochlorite agent storage tank 2, the first pipeline 5, the water pump 5, and the second pipeline 7, thereby avoiding the pipeline blockage caused by the deposition of agents and the accumulation of impurities inside the aluminum sulfate agent storage tank 1, the sodium hypochlorite agent storage tank 2 and the pipelines, which is beneficial to extending the service life of the pipeline, reducing the expenses of maintaining and replacing the pipeline, and reducing the cost of using the pipeline. In addition, by detecting the first PH probe 101 set at the water supply end 10 and the second PH probe 91 set in the fourth pipeline, the difference in PH value between the incoming water and the outgoing water can be obtained, and then the pipeline cleaning effect can be judged, which is beneficial to improving the efficiency of pipeline cleaning.

[0045] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention and are not intended to limit the present invention to the specific embodiments described. Obviously, other modifications and variations may be made based on the contents of this specification. The embodiments selected and specifically described in this specification are intended to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. They are not intended to limit the present invention, and any simple variations of the present invention fall within the scope of protection of the present invention.

Claims

1. A sewage treatment plant dosing pipeline system, characterized in that: It includes an aluminum sulfate storage tank and a sodium hypochlorite storage tank, wherein the aluminum sulfate storage tank is connected to a CASS tank through a first pipeline unit; the sodium hypochlorite storage tank is connected to the CASS tank or a filter tank through a second pipeline unit; The first pipeline unit and the second pipeline unit have the same structure; and the first pipeline unit includes a first pipeline, a water pump, a second pipeline, a third pipeline connected to the first pipeline, and a fourth pipeline connected to the second pipeline, which are connected in sequence; The other end of the first pipeline of the first pipeline unit is connected to the drug outlet of the aluminum sulfate reagent storage tank, and the second pipeline is connected to the drug addition port of the CASS tank; The other end of the first pipeline of the second pipeline unit is connected to the drug outlet of the sodium hypochlorite agent storage tank, and the second pipeline is connected to the drug addition ports of the CASS tank and the filter tank respectively; The other ends of the third pipelines of the first pipeline unit and the second pipeline unit are both connected to a water supply end, and the water supply end is provided with a first pH probe for detecting the pH value of the water source at the water supply end; the other ends of the fourth pipelines of the first pipeline unit and the second pipeline unit are both connected to a wastewater tank; the fourth pipeline is used to discharge the fluid in the pipeline, and the fourth pipeline is provided with a second pH probe for detecting the pH value of the fluid in the fourth pipeline; A booster pump is provided on the third pipeline, and the third pipeline is connected to a cleaning agent storage tank through an injection pipe; a diaphragm metering pump is provided on the injection pipe, and a first electromagnetic flowmeter is provided on one end of the third pipeline close to the booster pump and on the injection pipe;.

2. A sewage treatment plant dosing pipeline system according to claim 1, characterized in that: The first pipeline, the third pipeline, the second pipeline, the fourth pipeline and the injection pipe are each provided with a first electromagnetic valve; the second pipeline is each provided with a second electromagnetic flowmeter.

3. A sewage treatment plant dosing pipeline system according to claim 1, characterized in that: The second pipeline is also provided with a pulse damper and a check valve in sequence.

4. A sewage treatment plant dosing pipeline system according to claim 3, characterized in that: A diaphragm pressure gauge is also provided on the second pipeline between the pulse dampener and the check valve; an exhaust valve and a safety valve are also provided in sequence on the second pipeline on the side of the check valve away from the pulse dampener.

5. A sewage treatment plant dosing pipeline system according to claim 1, characterized in that: The water supply end is a water tank or a tap water supply device; the water pump is a single screw pump; and the liquid level meter is a magnetic flap liquid level meter.

6. A sewage treatment plant dosing pipeline system according to claim 1, characterized in that: The second pipeline of the first pipeline unit is connected to the second pipeline of the second pipeline unit through a fifth pipeline, and a manual valve is provided on the fifth pipeline.

7. A sewage treatment plant dosing pipeline system according to claim 1, characterized in that: The top of the aluminum sulfate agent storage tank and the sodium hypochlorite agent storage tank are also provided with a water supply pipe and a liquid supply pipe for adding water purification agent. The water supply pipe is connected to the end of the third pipeline away from the booster pump and the first solenoid valve; the liquid supply pipe is provided with a second solenoid valve and a third electromagnetic flowmeter.

8. A sewage treatment plant dosing pipeline system according to claim 1, characterized in that: A stirring motor is provided on the top of each of the aluminum sulfate agent storage tank, the sodium hypochlorite agent storage tank and the cleaning agent storage tank. A stirring blade is provided at the bottom of the stirring motor, and the stirring blade is inserted into the corresponding aluminum sulfate agent storage tank and the sodium hypochlorite agent storage tank or the cleaning agent storage tank.

9. A sewage treatment plant dosing pipeline system according to claim 1, characterized in that: A liquid level gauge is provided in each of the aluminum sulfate agent storage tank, the sodium hypochlorite agent storage tank and the cleaning agent storage tank.

10. A sewage treatment plant dosing pipeline system according to claim 1, characterized in that: The bottom of the aluminum sulfate agent storage tank and the sodium hypochlorite agent storage tank are both provided with a drainage outlet.

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