WO2023236590A1 - Clean-in-place calcium hydroxide pipe system, and method for using same - Google Patents

Abstract

The present invention relates to the technical field of pipe cleaning. Disclosed are a clean-in-place calcium hydroxide pipe system and a method for using same. The clean-in-place calcium hydroxide pipe system comprises a first clarification tank, a second clarification tank, a first calcium hydroxide discharge assembly and a second calcium hydroxide discharge assembly, wherein the first clarification tank is in communication with the second clarification tank by means of providing a first pipe; the first calcium hydroxide discharge assembly is in communication with the first pipe by means of providing a second pipe; and the second calcium hydroxide discharge assembly is in communication with the first pipe by means of providing a third pipe. The pipe system further comprises an agent-feeding and cleaning tank, which is in communication with the second pipe and the third pipe by means of providing a first bifurcated pipe, and is further in communication with the first pipe by means of providing a second bifurcated pipe. According to the present invention, the pipe system has a simple maintenance process and a short cleaning period, requires a short amount of time to be put into operation, and ensures the water supply.

Description

A lime milk pipeline system capable of online cleaning and its use method Technical field

The invention relates to the technical field of pipeline cleaning, and in particular to a milk-of-lime pipeline system capable of online cleaning and a method of using the same.

Background technique

At present, in the advanced water treatment system in thermal power plants, the clarifier uses lime milk and polymerized ferric sulfate for clarification treatment. The transportation method is: passing the aqueous solution containing milk of lime through the pipeline conveyor into the clarification tank; however, since the main component of the milk of lime solution is calcium hydroxide, calcium hydroxide is adhesive and easily adheres to the inside of the pipeline. Over time, the milk of lime will The increase in the thickness of the adhesion will easily cause the diameter of the pipeline to become smaller. In the long run, it will cause the pipeline to become clogged, resulting in a decline in equipment processing, and in severe cases, it cannot operate. At the same time, because the milk of lime solution is alkaline, the milk of lime adheres to the pipeline. , will also affect the stability of the dosing system, causing the pH adjustment to fail to meet the requirements, resulting in poor hardness removal during water treatment, affecting water quality.

In the existing technology, most of the methods to solve the blockage of milk of lime pipeline are to cut the pipeline, clean and dredge the pipeline section by section, and then weld the pipeline after the dredging is completed. However, the length of the milk of lime pipeline makes its maintenance process more troublesome. And the cleaning cycle is long, which affects the operation of the equipment and has an impact on the water supply system. At the same time, the lime dosing system is generally used for gray water sources and is added to the mechanical accelerated mixing clarifier. If the lime system is stopped for maintenance, after the maintenance is completed, the mechanical It takes a long time to put the accelerated mixing clarifier back into operation. For northern co-thermal power plants, the water supply volume is large and it is easy to cause water supply interruption.

Contents of the invention

In view of this, the present invention provides a lime milk pipeline system that can be cleaned online and a method of using the same.

In order to solve the above technical problems, the technical solution of the present invention is: firstly, the present invention provides a milk of lime pipeline system that can be cleaned online, including a first clarifier, a second clarifier, and a first milk of lime discharge assembly and a second lime milk discharging assembly, the first communication port of the first clarification tank and the first communication port of the second clarification tank are connected together through a first pipe;

The discharge end of the first milk of lime discharging assembly is connected to the first pipe by providing a second pipe, and a first electronic control valve, the first ball valve and the first stop valve;

The discharging end of the second milk of lime discharging component is connected to the first pipe by providing a third pipe, and a second electronic control valve, a second ball valve and a second stop valve;

The pipeline system also includes a dosing and cleaning box. The first communication port of the dosing and cleaning box is connected to the second pipe and the third pipe by setting a first bifurcated pipe. The branch end of the first bifurcated pipe is connected to the third pipe. The second pipeline is connected to the third pipeline, and a third ball valve, a medicine pump, a third stop valve and a fourth ball valve are arranged on the pipeline at the converging end of the first bifurcated pipeline in a direction away from the chemical dosing and cleaning box;

The second communication port of the dosing and cleaning box is connected to the first pipe by setting a second bifurcated pipe. One side of the branch end pipe of the second bifurcated pipe is connected to the pipe on the side of the first pipe close to the first clarifier. On the road, the branch pipe on the other side is connected to the pipe on the side of the first pipe close to the second clarifier, and fifth ball valves are provided on both ends of the pipes on both sides of the branch pipe on the second branch pipe;

The third communication port of the dosing and cleaning box is connected with the external collection pool through a pipeline connection, and a sixth ball valve is provided on the pipeline connecting the third communication port of the dosing and cleaning box with the external collection pool;

The first pipeline is also provided with a fourth stop valve, a fifth stop valve and a seventh ball valve. The fourth stop valve is arranged close to the first clarifier, and the fourth stop valve is located on the first pipeline at a position higher than that of the second clarifier. The connection position of the fork pipe and the first pipe close to the first clarifier side is closer to the first clarifier, the fifth stop valve is arranged close to the second clarifier, and the fifth stop valve is located on the first pipe at a similar position. The connection position of the second bifurcated pipe and the first pipe close to the second clarification tank side is closer to the second clarification tank. The seventh ball valve is installed at the position where the second pipe is connected to the first pipe and connected to the third pipe. on the pipeline of the first pipeline between locations on the first pipeline.

Further, the second pipeline is connected to the first pipeline by providing a third bifurcated pipeline, and the converging end of the third bifurcated pipeline is connected to the pipe between the first electronically controlled valve and the first ball valve on the second pipeline. On the road, the branch end of the third bifurcated pipe is connected to the pipe between the fourth stop valve and the seventh ball valve on the first pipe, and the pipes on both sides of the branch end of the third bifurcated pipe are equipped with self-contained pipes that are far away from the second pipe. The eighth ball valve, the first feeding pump, the sixth stop valve and the ninth ball valve are arranged in sequence.

Further, the third pipeline is connected to the first pipeline by providing a fourth bifurcated pipeline, and the converging end of the fourth bifurcated pipeline is connected to the pipe between the second electronically controlled valve and the second ball valve on the third pipe. On the road, the branch end of the fourth bifurcated pipe is connected to the pipe between the fifth stop valve and the seventh ball valve on the first pipe, and the pipes on both sides of the branch end of the fourth bifurcated pipe are equipped with self-contained pipes that are far away from the third pipe. The tenth ball valve, the second feeding pump, the seventh stop valve and the eleventh ball valve are arranged in sequence.

Furthermore, a twelfth ball valve is also provided on the first pipeline, and the twelfth ball valve is arranged on the first pipeline at the connection position between the second bifurcation pipe and the first pipe and at the connection position between the third bifurcation pipe and the first pipe. on the pipeline between.

Furthermore, a thirteenth ball valve is also provided on the first pipeline, and the thirteenth ball valve is provided on the first pipeline at the connection position between the second bifurcation pipe and the first pipe and at the connection position between the fourth bifurcation pipe and the first pipe. on the pipeline between.

Further, the discharge end of the first milk of lime discharge component and the third bifurcated pipe are also connected to the external tap water pump main pipe through pipeline connections. The discharge end of the first milk of lime discharge component An eighth stop valve is provided on the pipeline connected to the external tap water pump main pipe. A first manual butterfly valve and a first manual butterfly valve are arranged on the pipeline connected to the external tap water pump main pipe from the direction close to the third bifurcated pipeline. Electric butterfly valve.

Further, the discharge end of the second milk of lime discharge component and the fourth bifurcated pipe are also connected to the external tap water pump main pipe through pipeline connections. The discharge end of the second milk of lime discharge component A ninth stop valve is provided on the pipeline connected to the external tap water pump main pipe. A second manual butterfly valve and a third manual butterfly valve are arranged on the pipeline connected to the external tap water pump main pipe from the direction close to the fourth bifurcated pipeline. Two electric butterfly valves.

Further, the second communication port of the first clarifier is connected to the external dosing room through a pipeline connection, and the third communication port of the first clarification tank is connected to the external water outlet through a pipeline connection. The fourth communication port of the first clarifier is connected to the main pipe of the external running water pump and the external sludge pump respectively through pipeline connections. The fourth communication port of the first clarifier is connected to the main pipe of the external running water pump. There is a tenth stop valve, and a fourteenth ball valve and a third electronic control valve are arranged in sequence from the direction away from the first clarifier on the pipeline connecting the fourth communication port of the first clarifier and the external sludge pump. The pipeline connecting the fourth communication port to the main pipe of the external tap water pump and the pipeline connecting the fourth communication port of the first clarifier to the external sludge pump are also connected together through a fourth pipeline. The fourth pipeline is provided with There is a third electric butterfly valve and an eleventh stop valve.

Further, the second communication port of the second clarification tank is connected to the external dosing room through a pipeline connection, and the third communication port of the second clarification tank is connected to the external water outlet channel through a pipeline connection. The fourth communication port of the second clarifier is connected to the main pipe of the external running water pump and the external sludge pump respectively through pipeline connections. The fourth communication port of the second clarifier is connected to the main pipe of the external running water pump. There is a twelfth stop valve, and a fifteenth ball valve and a fourth electric control valve are arranged in sequence from the direction away from the second clarifier on the pipeline connecting the fourth communication port of the second clarifier and the external sludge pump. The second clarifier The fourth communication port of the second clarifier is connected to the main pipe of the external tap water pump, and the fourth communication port of the second clarifier is connected to the external mud pump. The fifth pipeline is also connected to the fifth pipeline. It is equipped with the fourth electric butterfly valve and the thirteenth stop valve.

In a second aspect, the present invention provides a method of using a milk-of-lime pipeline system that can be cleaned online, including the following steps:

When the lime milk pipeline system is in operation, in addition to the first electric control valve, the second electric control valve, the first electric butterfly valve, the second electric butterfly valve, the third electric control valve, the third electric butterfly valve, the fourth electric control valve, All except the fourth electric butterfly valve, the first ball valve, the first stop valve, the second ball valve, the second stop valve, the third ball valve, the third stop valve, the fourth ball valve, the fifth ball valve, the sixth ball valve and the seventh ball valve The valves are all in a normally open state, the first electronic control valve, the second electronic control valve, the first electric butterfly valve, the second electric butterfly valve, the third electric control valve, the third electric butterfly valve, the fourth electric control valve and the fourth electric butterfly valve. The opening and closing states are changed according to actual needs. The first ball valve, the first stop valve, the second ball valve, the second stop valve, the third ball valve, the third stop valve, the fourth ball valve, the fifth ball valve, the sixth ball valve and the third All seven ball valves are normally closed;

When the milk of lime pipeline system is blocked, determine the blockage form of the milk of lime pipeline system based on the phenomenon caused by the blockage;

If the blockage is in the form of lime milk blockage in the pipeline, close the first electric control valve, the second electric control valve, the fourth stop valve, the fifth stop valve, the first electric butterfly valve, the second electric butterfly valve, the ninth ball valve and the eleventh ball valve, and open the first stop valve, the second stop valve, the third ball valve, the third stop valve, the fourth ball valve and the fifth ball valve, and at the same time control the medicine pump to start working, and the medicine pump will spray the medicine liquid in the dosing and cleaning box. into the milk of lime pipeline system and circulate in the milk of lime pipeline system. At the same time, the pH value of the medicinal liquid in the dosing and cleaning box is measured. If the pH value of the medicinal liquid drops, add the medicinal liquid. If When the pH value of the liquid is stable, stop the circulation of the liquid and soak it. After soaking for a certain period of time, open the first electric butterfly valve, the second electric butterfly valve and the sixth ball valve, and use the water from the external tap water pump main pipe to clean the milk of lime pipeline. The system is flushed, and the flushed liquid flows out into the external collection tank;

If the blockage is in the form of blockage at the pump ports of the first feeding pump and the second feeding pump, close the first electric control valve, the second electric control valve, the fourth stop valve, the fifth stop valve, the first electric butterfly valve and The second electric butterfly valve opens the first ball valve, the second ball valve, the third ball valve, the third stop valve, the fourth ball valve and the fifth ball valve, and at the same time controls the chemical pump to start working, and the chemical pump will add medicine to clean the liquid in the tank. Pour into the milk of lime pipeline system and circulate in the milk of lime pipeline system. At the same time, the pH value of the medicinal liquid in the dosing and cleaning box is measured. If the pH value of the medicinal liquid drops, add the medicinal liquid. If the pH value of the medicinal solution is stable, stop the circulation of the medicinal solution and soak it. After soaking for a certain period of time, open the first electric butterfly valve, the second electric butterfly valve and the sixth ball valve, and use the water from the external tap water pump main pipe to purify the lime milk. The pipeline system is flushed, and the flushed liquid flows out into an external collection tank.

Compared with the prior art, the advantages of the present invention are:

In the present invention, by adding a dosing cleaning box and setting up supporting pipelines and valves, when the milk of lime pipeline is blocked, the pipeline can be cleaned without cutting the pipeline. It only needs to control the opening and closing of the corresponding valve and then use the dosing pump to clean the pipeline. The liquid in the dosing and cleaning box is injected into the milk of lime pipeline, and the milk of lime pipeline can be cleaned online. At the same time, during the cleaning process, the first clarifier and the second clarifier can be separated from the ones that need to be cleaned due to the closing of the corresponding valves. The lime milk pipeline is separated, so that there is no need to shut down the operation of the first clarifier and the second clarifier during the cleaning process to shorten the operation time. Compared with the existing technology, it has the advantages of simple maintenance process, short cleaning cycle, It has the advantages of short operation time and guaranteed water supply.

The present invention separates the milk-of-lime pipeline system into two pipeline systems with the same function by providing a seventh ball valve, so that when one of the pipeline systems fails, the other pipeline system can be connected by opening the seventh ball valve. The pipeline system is connected to improve the overall risk resistance of the lime milk pipeline system. In the subsequent cleaning work, when one of the pipeline systems stops cleaning, the other pipeline system can be operated by running the other pipeline system. system to ensure the stability of the overall water supply system and avoid water supply interruptions as much as possible.

The present invention provides a method for using a milk of lime pipeline system that can be cleaned online. By using this method, online cleaning of the milk of lime pipeline can be achieved without affecting the work of the first clarifier and the second clarifier. The cleaning effect is ensured by adjusting the pH value, soaking in chemical solution and other methods to reduce the amount of lime milk adhering to the pipeline as much as possible.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings needed to describe the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the present invention.

Reference signs: 1. First clarifier; 2. Second clarifier; 3. First milk of lime discharging assembly; 4. Second milk of lime discharging assembly; 5. First pipe; 6. Second pipe; 7. The first electronically controlled valve; 8. The first ball valve; 9. The first stop valve; 10. The third pipeline; 11. The second electronically controlled valve; 12. The second ball valve; 13. The second stop valve; 14. Dosing and cleaning box; 15. First bifurcated pipe; 16. Third ball valve; 17. Chemical pump; 18. Third stop valve; 19. Fourth ball valve; 20. Second bifurcated pipe; 21. Fifth ball valve ; 22. External collection tank; 23. Sixth ball valve; 24. Fourth stop valve; 25. Fifth stop valve; 26. Seventh ball valve; 27. Third bifurcated pipe; 28. Eighth ball valve; 29. One feeding pump; 30. The sixth stop valve; 31. The ninth ball valve; 32. The fourth bifurcated pipe; 33. The tenth ball valve; 34. The second feeding pump; 35. The seventh shut-off valve; 36. The third Eleven ball valve; 37, twelfth ball valve; 38, thirteenth ball valve; 39, eighth stop valve; 40, first manual butterfly valve; 41, first electric butterfly valve; 42, ninth stop valve; 43, second Manual butterfly valve; 44. Second electric butterfly valve; 45. External tap water pump main pipe; 46. External mud pump; 47. External dosing room; 48. External outlet channel; 49. Tenth stop valve; 50. Tenth Four ball valves; 51. The third electric control valve; 52. The fourth pipeline; 53. The third electric butterfly valve; 54. The eleventh stop valve; 55. The twelfth stop valve; 56. The fifteenth ball valve; 57. Four electric control valves; 58. The fifth pipeline; 59. The fourth electric butterfly valve; 60. The thirteenth stop valve.

Implementation

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Embodiment 1: Please refer to Figure 1. This embodiment provides a milk of lime pipeline system that can be cleaned online, including a first clarifier 1, a second clarifier 2, a first milk of lime discharge assembly 3 and a second milk of lime. The discharge assembly 4, the first clarifier 1 and the second clarifier 2 are used to remove suspended solids and colloids from the incoming liquid. The first lime milk discharge assembly 3 and the second lime milk discharge assembly 4 are used to Produce a milk of lime solution;

The first communication port of the first clarification tank 1 and the first communication port of the second clarification tank 2 are connected together by providing a first pipe 5;

The discharge end of the first milk of lime discharging assembly 3 is connected with the first pipe 5 by providing a second pipe 6 so that the milk of lime solution produced by the first milk of lime discharging assembly 3 can pass through the first pipe 5 and The second pipeline 6 enters the first clarification tank 1 and the second clarification tank 2. A first electronically controlled valve 7 and a first ball valve 8 are arranged on the pipeline of the second pipeline 6 in a direction away from the first lime milk discharging assembly 3. and the first stop valve 9;

The discharge end of the second milk of lime discharging assembly 4 is connected with the first pipe 5 by providing a third pipe 10 so that the milk of lime solution produced by the second milk of lime discharging assembly 4 can pass through the first pipe 5 and The third pipeline 10 enters the first clarifier 1 and the second clarifier 2. The third pipeline 10 is provided with a second electronically controlled valve 11 and a second ball valve 12 in sequence from the direction away from the second lime milk discharging assembly 4. and the second stop valve 13;

The milk of lime piping system also includes a dosing and cleaning box 14, in which an acidic liquid that can react with the milk of lime is added; the first communication port of the dosing and cleaning box 14 is provided with a first bifurcation. The pipeline 15 is connected with the second pipeline 6 and the third pipeline 10 respectively, and the branch end of the first bifurcated pipeline 15 is connected with the second pipeline 6 and the third pipeline 10 so that the chemical liquid in the chemical dosing cleaning tank 14 can The first bifurcated pipe 15 flows into the second pipe 6 and the third pipe 10, thereby cleaning the pipes flowing through it. At the same time, the branch end of the first bifurcated pipe 15 is connected to the second pipe 6 and the third pipe. The positions on 10 are respectively between the first ball valve 8 and the first stop valve 9 and between the second ball valve 12 and the second stop valve 13, so that the first ball valve 8 and the first stop valve 9 can connect the chemical dosing cleaning box 14 and The first pipeline 5 and the first milk of lime discharging assembly 3 are isolated, so that the second ball valve 12 and the second stop valve 13 can isolate the dosing cleaning box 14 from the first pipeline 5 and the first milk of lime discharging assembly 4 , to facilitate the subsequent cleaning work; a third ball valve 16, a chemical pump 17, a third stop valve 18 and a fourth ball valve 19 are arranged in sequence on the confluence end of the first bifurcated pipe 15 from the direction away from the chemical dosing cleaning box 14;

The second communication port of the chemical dosing and cleaning box 14 is connected with the first pipe 5 by providing a second bifurcated pipe 20, so that the chemical dosing and cleaning box 14 is connected with the first pipe 5 through the second bifurcated pipe 20, so that During the subsequent cleaning work, one side of the branch end pipe of the second bifurcated pipe 20 is connected to the pipe on the side of the first pipe 5 close to the first clarifier 1, and the other side of the branch end pipe is connected to the first pipe. 5. On the pipeline close to the 2nd side of the second clarifier, so that all pipelines can be cleaned as much as possible during the subsequent cleaning of the pipelines. Both ends of the pipelines on both sides of the split end of the second bifurcated pipeline 20 are provided with There is a fifth ball valve 21. The arrangement of the fifth ball valve 21 can isolate the dosing cleaning box 14 from the first pipeline 5, and can also isolate the pipelines on both sides of the branch end of the second bifurcated pipeline 20 to facilitate subsequent cleaning work. progress;

The third communication port of the dosing and cleaning box 14 is connected to the external collection pool 22 through a pipeline connection to facilitate subsequent collection of waste liquid. The third communication port of the dosing and cleaning box 14 is connected to the external collection pool 22. The pipeline is provided with a sixth ball valve 23;

The first pipeline 5 is also provided with a fourth stop valve 24 , a fifth stop valve 25 and a seventh ball valve 26 . The fourth stop valve 24 is located close to the first clarifier 1 , and the fourth stop valve 24 is located in the first pipeline 5 The position above is closer to the first clarification tank 1 than the connection position of the second branch pipe 20 and the first pipe 5 close to the first clarification tank 1 side, so that when the fourth stop valve 24 is closed, the The first communication port of the first clarifier 1 is isolated from the external pipeline to facilitate subsequent cleaning work. The fifth stop valve 25 is disposed close to the second clarifier 2 , and the fifth stop valve 25 is provided on the first pipe 5 The position is closer to the second clarification tank 2 than the connection position of the second branch pipe 20 and the first pipe 5 close to the second clarification tank 2 side, so that when the fifth stop valve 25 is closed, the third The first communication port of the second clarifier 2 is isolated from the external pipeline to facilitate subsequent cleaning work. The seventh ball valve 26 is located at the position where the second pipe 6 is connected to the first pipe 5 and the third pipe 10 is connected to the third pipe. On the pipeline of the first pipeline 5 between the positions on the pipeline 5, in order to play a separation role, the lime milk pipeline system can be divided into two pipeline systems with the same function. Not only can one of the pipelines When the system fails, another set of pipeline system is connected by opening the seventh ball valve 26 to improve the overall risk resistance of the milk-of-lime pipeline system and facilitate subsequent cleaning work.

In this embodiment, the second pipeline 6 is connected to the first pipeline 5 by providing a third bifurcated pipeline 27 , and the converging end of the third bifurcated pipeline 27 is connected to the first electronically controlled valve 7 and the second pipeline 6 on the second pipeline 6 . On the pipeline between the ball valves 8, the first electronically controlled valve 7 can isolate the first lime milk discharging assembly 3 from the external pipeline to facilitate subsequent cleaning work. The branch end of the third bifurcated pipeline 27 is connected On the pipeline between the fourth stop valve 24 and the seventh ball valve 26 on the first pipeline 5, eighth valves are arranged sequentially from the direction away from the second pipeline 6 on both sides of the branch end of the third bifurcated pipeline 27. The ball valve 28, the first feeding pump 29, the sixth stop valve 30 and the ninth ball valve 31; through the above settings, it can be ensured that the lime milk solution produced by the first lime milk discharge assembly 3 can enter the first clarification tank more quickly 1 and the second clarifier 2.

In this embodiment, the third pipeline 10 is connected to the first pipeline 5 by providing a fourth bifurcated pipeline 32, so that the second electronically controlled valve 11 can isolate the second lime milk discharging assembly 4 from the external pipeline. In order to facilitate subsequent cleaning work, the converging end of the fourth bifurcated pipe 32 is connected to the pipeline between the second electronically controlled valve 11 and the second ball valve 12 on the third pipe 10, and the branching end of the fourth bifurcated pipe 32 is connected to On the pipeline between the fifth stop valve 25 and the seventh ball valve 26 on the first pipeline 5, tenth valves are arranged sequentially from the direction away from the third pipeline 10 on both sides of the branch end of the fourth bifurcated pipeline 32. The ball valve 33, the second feeding pump 34, the seventh stop valve 35 and the eleventh ball valve 36; through the aforementioned settings, it can be ensured that the lime milk solution produced by the second lime milk discharging assembly 4 can enter the first clarification more quickly. Pool 1 and the second clarifier 2.

The first pipe 5 is also provided with a twelfth ball valve 37 and a thirteenth ball valve 38. The twelfth ball valve 37 is provided on the first pipe 5 at the connection position between the second branch pipe 20 and the first pipe 5 and the third branch. On the pipeline between the connection position of the pipeline 27 and the first pipeline 5, the twelfth ball valve 37 can isolate the first clarification tank 1 and the first lime milk discharging assembly 3 to increase the risk resistance of the overall system. The thirteenth ball valve 38 is disposed on the first pipeline 5 between the connection position of the second branch pipe 20 and the first pipe 5 and the connection position of the fourth branch pipe 32 and the first pipe 5, so that the thirteenth ball valve 38 The second clarifier 2 and the second lime milk discharging assembly 4 can be isolated to increase the risk resistance of the overall system.

In this embodiment, the discharge end of the first milk of lime discharging component 3 and the third bifurcated pipe 27 are also connected to the external tap water pump main pipe 45 through pipe connections to serve as the first milk of lime discharging component. 3 generates lime milk solution to provide enough water and facilitate subsequent flushing operations; an eighth stop valve 39 is provided on the pipeline connecting the discharge end of the first lime milk discharging component 3 and the external tap water pump main pipe 45, and the third The first manual butterfly valve 40 and the first electric butterfly valve 41 are disposed in sequence on the pipeline connecting the bifurcated pipe 27 and the external tap water pump main pipe 45 from the direction close to the third bifurcated pipe 27 .

In this implementation, the discharge end of the second milk of lime discharging assembly 4 and the fourth bifurcated pipe 32 are also connected to the external tap water pump main pipe 45 through pipe connections, so that the second milk of lime discharging assembly 4 The lime milk solution is generated to provide enough water and facilitate subsequent flushing operations. A ninth stop valve 42 is provided on the pipeline connecting the discharge end of the second lime milk discharging assembly 4 and the external tap water pump main pipe 45. A second manual butterfly valve 43 and a second electric butterfly valve 44 are disposed in sequence on the pipeline connecting the fork pipe 32 and the external tap water pump main pipe 45 from the direction close to the fourth bifurcated pipe 32 .

In this embodiment, the second communication port of the first clarification tank 1 is connected with the external dosing room 47 through a pipeline connection, so that the external dosing room 47 can add the required flocculant into the first clarification tank 1 , the third communication port of the first clarifier 1 is connected with the external outlet channel 48 through a pipeline connection, so that the first clarifier 1 can discharge the treated water, and the fourth communication port of the first clarifier 1 passes through The pipelines are connected to the external running water pump main pipe 45 and the external sludge discharge pump 46 respectively, so that the first clarifier 1 can discharge sewage and the water flow from the external running water pump main pipe 45 can be connected to its fourth flow port. Some pipelines are cleaned; a tenth stop valve 49 is provided on the pipeline connecting the fourth communication port of the first clarifier 1 to the external tap water pump main pipe 45, and the fourth communication port of the first clarifier 1 is connected to the external mud discharge The pipeline connected to the pump 46 is provided with a fourteenth ball valve 50 and a third electronically controlled valve 51 in order from the direction away from the first clarifier 1. The fourth communication port of the first clarifier 1 is connected to the external tap water pump main pipe 45. The pipelines connected to the fourth communication port of the first clarifier 1 and the external sludge pump 46 are also connected together by setting a fourth pipe 52. The fourth pipe 52 is provided for subsequent use of the first clarifier. When the fourth communication port of 1 is connected to the external mud pump 46 for cleaning, it can balance the water pressure and prevent pipeline rupture due to changes in water pressure in the pipeline caused by pipeline blockage. , the fourth pipeline 52 is provided with a third electric butterfly valve 53 and an eleventh stop valve 54.

In this embodiment, the second communication port of the second clarification tank 2 is connected with the external dosing room 47 through a pipeline connection, so that the external dosing room 47 can add the required flocculant into the second clarification tank 2 , the third communication port of the second clarifier 2 is connected with the external outlet channel 48 through a pipeline connection, so that the second clarifier 2 can discharge the treated water, and the fourth communication port of the second clarifier 2 passes through The pipelines are connected to the external running water pump main pipe 45 and the external sludge discharge pump 46 respectively, so that the second clarifier 2 can discharge sewage and the water flow from the external running water pump main pipe 45 can be connected to its fourth flow port. Some pipelines are cleaned; a twelfth stop valve 55 is provided on the pipeline connecting the fourth communication port of the second clarifier 2 and the external tap water pump main pipe 45, and the fourth communication port of the second clarifier 2 is connected to the external discharge pipe. A fifteenth ball valve 56 and a fourth electric control valve 57 are arranged in sequence on the pipeline connected to the mud pump 46 from the direction away from the second clarifier 2. The fourth communication port of the second clarifier 2 is connected to the external tap water pump main pipe 45. The pipeline is also connected to the pipeline connecting the fourth communication port of the second clarifier 2 and the external sludge pump 46 through a fifth pipeline 58. The fifth pipeline 58 is provided for subsequent clarification of the second clarification tank. When the pipeline connecting the fourth communication port of the pool 2 and the external mud pump 46 is cleaned, it plays a role in balancing the water pressure and preventing pipeline rupture due to changes in water pressure in the pipeline caused by pipeline blockage. occurs, the fifth pipeline 58 is provided with a fourth electric butterfly valve 59 and a thirteenth stop valve 60 .

Embodiment 2; Please refer to Figure 1. Based on Embodiment 1, this embodiment proposes a method for using a milk-of-lime pipeline system that can be cleaned online, including the following steps:

When the lime milk pipeline system in Embodiment 1 is running, in addition to the first electronic control valve 7, the second electronic control valve 11, the first electric butterfly valve 41, the second electric butterfly valve 44, the third electric control valve 51, and the third electric butterfly valve 53. The fourth electronically controlled valve 57, the fourth electric butterfly valve 59, the first ball valve 8, the first stop valve 9, the second ball valve 12, the second stop valve 13, the third ball valve 16, the third stop valve 18, the fourth All valves except the ball valve 19, the fifth ball valve 21, the sixth ball valve 23 and the seventh ball valve 26 are in a normally open state. The first electronically controlled valve 7, the second electronically controlled valve 11, the first electric butterfly valve 41, the second electric butterfly valve 41 The butterfly valve 44, the third electric control valve 51, the third electric butterfly valve 53, the fourth electric control valve 57 and the fourth electric butterfly valve 59 change their opening and closing states according to actual needs. If necessary, the first clarifier 1 and the second clarifier When the lime milk solution produced by the first milk of lime discharging assembly 3 and the second milk of lime discharging assembly 4 is added to the pool 2, the first electric control valve 7 and the second electric control valve 11 are opened to cooperate with the first feeding pump 29 and the second feeding pump 34 work to transport the milk of lime solution. For example, when the milk of lime solution produced by the first milk of lime discharging assembly 3 and the second milk of lime discharging assembly 4 has insufficient water content, the first electric butterfly valve 41 and The second electric butterfly valve 44 opens, and cooperates with the water from the external tap water pump main pipe 45 to replenish the lime milk solution. If the first clarifier 1 and the second clarifier 2 need to discharge sewage, the third electronic control valve 51 and the second The four electronically controlled valves 57 are opened to cooperate with the sewage discharge. If it is necessary to clean the sewage pipelines connected to the fourth connecting ports of the first clarifier 1 and the second clarifier 2, the third electronically controlled butterfly valve and the fourth electronically controlled butterfly valve Open, balance water pressure; first ball valve 8, first stop valve 9, second ball valve 12, second stop valve 13, third ball valve 16, third stop valve 18, fourth ball valve 19, fifth ball valve 21, The sixth ball valve 23 and the seventh ball valve 26 are both in a normally closed state; at the same time, during operation, one of the two pipeline systems separated by the seventh ball valve 26 should be in operation, while the other pipeline system is not. Operates as a backup piping system.

When the milk of lime pipeline system is clogged, the blockage form of the milk of lime pipeline system is determined based on the phenomenon of blockage; for ease of understanding, in this embodiment, it is assumed that the blocked pipeline system is the pipeline with the first clarifier 1 The system, that is, the pipeline system with the first clarifier 1 is operated; the specific judgment method is: monitor the pH value of the incoming water in real time when the first clarifier 1 is operating. If the pH value is found to drop, check the first lime milk on site Whether the internal liquid level of the material component 3 has dropped; if the internal liquid level has dropped, it means that the running pipeline system is not blocked, and the user needs to check whether the first clarifier 1 is caused by an internal mechanical failure of the first clarifier 1. The pH value drops; if the internal liquid level does not drop, it means that the running pipeline system is blocked. Then the seventh ball valve 26 is opened, and the two sets of pipeline systems separated by the seventh ball valve 26 are connected, and the operation with the second pipeline system is started at the same time. The pipeline system of the clarifier 2 is then put into dosing while monitoring the pH value of the first clarifier 1. If the change in pH value increases, it means that the second feeding pump 34 can produce the lime milk from the second lime milk discharge assembly 4. It is easy to transport the liquid in the first clarifier 1, and it can be determined that the blockage is in the pump port position of the first feed pump 29. If the pH value of the first clarifier 1 remains unchanged, and at the same time, the second feed pump 34 The pressure gradually increases, and the material level in the second milk of lime discharge component 4 does not drop, then it can be determined that the blockage form is that the pipeline in the pipeline system with the first clarifier 1 is blocked by milk of lime;

If the blockage is in the form of lime milk blockage in the pipeline, close the first electric control valve 7, the fourth stop valve 24, the first electric butterfly valve 41 and the ninth ball valve 31, and connect the pipelines in the pipeline system with the first clarifier 1 to The first clarifier 1, the first lime milk discharging assembly 3, the first feeding pump 29, the external tap water pump main pipe 45 and the external sludge pump 46 are isolated, and then the first stop valve 9, the third ball valve 16, The third stop valve 18, the fourth ball valve 19 and the fifth ball valve 21 on the corresponding branch end pipeline in the second bifurcated pipeline 20 connected to the first pipeline 5 simultaneously control the chemical pump 17 to start working, so that the chemical pump 17 will increase the speed. The chemical liquid in the chemical cleaning box 14 is pumped into the pipeline system with the first clarifier 1, and circulates in the pipeline system. The added chemical liquid can react with the attached lime milk because it is acidic, so as to remove the attached liquid. The milk of lime in the milk of lime pipeline system is removed, and the pH value of the medicinal liquid in the dosing cleaning box 14 is measured in real time. If the pH value of the medicinal liquid drops, the medicinal liquid is replenished to stabilize the medicinal liquid in the dosing cleaning tank 14 pH value, if the pH value of the medicinal solution is stable, stop the circulation of the medicinal solution and perform soaking. After soaking for a certain period of time, in this embodiment, the soaking time is 24 hours; the specific soaking time can be determined according to the actual length of the milk of lime pipeline; by Open the first electric butterfly valve 41, the second electric butterfly valve 44 and the sixth ball valve 23, and use the water from the external tap water pump main pipe 45 to flush the lime milk pipeline system. The flushed liquid flows back into the dosing cleaning tank 14 and then flows out. Collect in the external collection tank 22; at this time, the adhesion amount of lime milk in the treated lime milk pipeline system will be greatly reduced;

If the blockage is in the pump port position of the first feeding pump 29, close the first electric control valve 7, the fourth stop valve 24, the first electric butterfly valve 41 and the ninth ball valve 31, and the first clarification tank will be The pipelines in the piping system of 1 are isolated from the first clarifier 1, the first lime milk discharging assembly 3, the first feeding pump 29, the external tap water pump main pipe 45 and the external sludge pump 46, and then open the first ball valve 8. The third ball valve 16, the third stop valve 18, the fourth ball valve 19 and the fifth ball valve 21 on the corresponding branch end pipeline in the second bifurcated pipeline 20 connected to the first pipeline 5 simultaneously control the chemical pump 17 to start working. , order the chemical pump 17 to drive the chemical liquid in the chemical dosing cleaning box 14 into the pipeline system, and circulate it in the pipeline system. Since the added chemical liquid is acidic, it can react with the attached lime milk to remove the attached lime milk. The milk of lime in the milk of lime pipeline system is removed, and the pH value of the medicinal liquid in the dosing cleaning box 14 is measured in real time. If the pH value of the medicinal liquid drops, the medicinal liquid is replenished to stabilize the medicinal liquid in the dosing cleaning tank 14 pH value, if the pH value of the medicinal solution is stable, stop the circulation of the medicinal solution and perform soaking. The soaking time is 24 hours. After the soaking is completed, the first electric butterfly valve 41, the second electric butterfly valve 44 and the sixth ball valve 23 are opened, with the help of external tap water. The water from the pump main pipe 45 flushes the milk of lime pipeline system, and the flushed liquid flows back into the dosing cleaning tank 14 and then flows out to the external collection pool 22 for collection; at this time, the treated milk of lime pipeline system The amount of lime milk adhesion will be greatly reduced.

At the same time, during the cleaning process of the pipeline system with the first clarifier 1, the second electric control valve 11, the fifth stop valve 25, the second electric butterfly valve 44, and the eleventh ball valve 36 can be opened and controlled. The second clarifier 2 and the second lime milk discharging assembly 4 are operated, that is, the pipeline system with the second clarifier 2 is started, so that the pipeline system replaces the pipeline system with the first clarifier 1 for water supply. Carry out treatment to ensure the stability of the overall water supply system and avoid water supply interruptions as much as possible.

In the present invention, unless otherwise explicitly stated and limited, the terms "installation", "setting", "connection", "fixing", "rotating" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. It can be detachably connected or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements. , unless otherwise explicitly limited, those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

The above are only typical examples of the present invention. In addition, the present invention can also have various other specific implementations. Any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present invention.

Claims (10)

1. A milk of lime pipeline system capable of online cleaning, including a first clarifier (1), a second clarifier (2), a first milk of lime discharge component (3) and a second milk of lime discharge component (4), It is characterized in that: the first communication port of the first clarification tank (1) and the first communication port of the second clarification tank (2) are connected together through a first pipe (5);

   The discharge end of the first lime milk discharging assembly (3) is connected to the first pipe (5) by setting a second pipe (6), and the pipeline of the second pipe (6) is away from the first lime milk discharge. The first electric control valve (7), the first ball valve (8) and the first stop valve (9) are arranged in sequence in the direction of the material assembly (3);

   The discharge end of the second lime milk discharging assembly (4) is connected to the first pipe (5) by setting a third pipe (10), and the pipeline of the third pipe (10) is away from the second lime milk discharge. A second electronically controlled valve (11), a second ball valve (12) and a second stop valve (13) are arranged in sequence in the direction of the material assembly (4);

   The pipeline system also includes a dosing and cleaning box (14). The first communication port of the dosing and cleaning box (14) is connected to the second pipe (6) and the third pipe (10) by setting a first bifurcated pipe (15). ) are connected together, the branch end of the first bifurcated pipe (15) is connected with the second pipe (6) and the third pipe (10), and the pipe at the converging end of the first bifurcated pipe (15) is away from the chemical dosing and cleaning A third ball valve (16), a medicine pump (17), a third stop valve (18) and a fourth ball valve (19) are arranged in sequence in the direction of the box (14);

   The second communication port of the dosing and cleaning box (14) is connected to the first pipe (5) by setting a second bifurcated pipe (20). One side of the branch end pipe of the second bifurcated pipe (20) is connected to the first pipe (5). On the pipeline on the side of the first pipeline (5) close to the first clarifier (1), the branch end pipeline on the other side is connected to the pipeline on the side of the first pipeline (5) close to the second clarifier (2). Fifth ball valves (21) are provided on both ends of the pipes on both sides of the branch pipe (20);

   The third communication port of the dosing and cleaning box (14) is connected to the external collection pool (22) through a pipeline connection, and the third communication port of the dosing and cleaning box (14) is connected to the external collection pool (22). There is a sixth ball valve (23) on the pipeline;

   The first pipeline (5) is also provided with a fourth stop valve (24), a fifth stop valve (25) and a seventh ball valve (26). The fourth stop valve (24) is located close to the first clarifier (1). And the fourth stop valve (24) is located on the first pipe (5) at a position closer to the connection between the second bifurcated pipe (20) and the first pipe (5) on the side of the first clarifier (1). The position is closer to the first clarifier (1), the fifth stop valve (25) is set close to the second clarifier (2), and the fifth stop valve (25) is located on the first pipe (5) at a lower position than the second clarifier (2). The connection position of the bifurcated pipe (20) and the pipe on the side of the first pipe (5) close to the second clarifier (2) is closer to the second clarifier (2), and the seventh ball valve (26) is located in the second pipe (6) Connect to the first pipe (5) between the position on the first pipe (5) and the position where the third pipe (10) connects on the first pipe (5).
2. A milk-of-lime pipeline system capable of online cleaning according to claim 1, characterized in that: the second pipeline (6) is connected to the first pipeline (5) by setting a third bifurcated pipeline (27) , the converging end of the third bifurcated pipe (27) is connected to the pipeline between the first electric control valve (7) and the first ball valve (8) on the second pipe (6), and the third bifurcated pipe (27) The branch end of the pipe is connected to the pipe between the fourth stop valve (24) and the seventh ball valve (26) on the first pipe (5), and the pipes on both sides of the branch end of the third bifurcated pipe (27) are provided with An eighth ball valve (28), a first feeding pump (29), a sixth stop valve (30) and a ninth ball valve (31) are arranged in sequence from the direction away from the second pipeline (6).
3. A milk-of-lime pipeline system capable of online cleaning according to claim 1, characterized in that: the third pipeline (10) is connected to the first pipeline (5) by setting a fourth bifurcated pipeline (32) , the converging end of the fourth bifurcated pipe (32) is connected to the pipeline between the second electronically controlled valve (11) and the second ball valve (12) on the third pipe (10), and the fourth bifurcated pipe (32) The branch end of the pipe is connected to the pipe between the fifth stop valve (25) and the seventh ball valve (26) on the first pipe (5), and the pipes on both sides of the branch end of the fourth bifurcated pipe (32) are provided with A tenth ball valve (33), a second feeding pump (34), a seventh stop valve (35) and an eleventh ball valve (36) are arranged in sequence from the direction away from the third pipeline (10).
4. A milk-of-lime pipeline system capable of online cleaning according to claim 2, characterized in that: the first pipeline (5) is also provided with a twelfth ball valve (37), and the twelfth ball valve (37) is On the first pipeline (5), on the pipeline between the connection position of the second bifurcation pipe (20) and the first pipe (5) and the connection position of the third bifurcation pipe (27) and the first pipe (5).
5. A milk-of-lime pipeline system capable of online cleaning according to claim 3, characterized in that: the first pipeline (5) is also provided with a thirteenth ball valve (38), and the thirteenth ball valve (38) is On the first pipeline (5), on the pipeline between the connection position of the second bifurcation pipe (20) and the first pipe (5) and the connection position of the fourth bifurcation pipe (32) and the first pipe (5).
6. A milk of lime pipeline system capable of online cleaning according to claim 1, characterized in that: the discharge end of the first milk of lime discharge assembly (3) and the third bifurcated pipe (27) are also connected by The pipeline connection method is connected with the external tap water pump main pipe (45). An eighth stop valve is provided on the pipeline connecting the discharge end of the first lime milk discharging assembly (3) with the external tap water pump main pipe (45). (39), the pipeline connecting the third bifurcated pipe (27) and the external tap water pump main pipe (45) is successively provided with a first manual butterfly valve (40) and a first electric butterfly valve (40) from the direction close to the third bifurcated pipe (27). Butterfly valve (41).
7. A milk of lime pipeline system capable of online cleaning according to claim 1, characterized in that: the discharge end of the second milk of lime discharge assembly (4) and the fourth bifurcated pipe (32) are also connected by The pipeline connection method is connected with the external tap water pump main pipe (45), and a ninth stop valve is provided on the pipeline connecting the discharge end of the second lime milk discharging assembly (4) with the external tap water pump main pipe (45). (42), the pipeline connecting the fourth bifurcated pipe (32) and the external water pump main pipe (45) is successively provided with a second manual butterfly valve (43) and a second manual butterfly valve (43) from the direction close to the fourth bifurcated pipe (32). Electric butterfly valve (44).
8. A milk-of-lime pipeline system capable of online cleaning according to claim 1, characterized in that: the second communication port of the first clarifier (1) is connected to the external dosing room (47) through a pipeline connection Together, the third communication port of the first clarifier (1) is connected to the external outlet channel (48) through a pipeline connection, and the fourth communication port of the first clarification tank (1) is connected to the external water outlet channel (48) through a pipeline connection. The external tap water pump main pipe (45) and the external sludge discharge pump (46) are connected together, and a tenth cutoff is provided on the pipeline connecting the fourth communication port of the first clarifier (1) and the external tap water pump main pipe (45). Valve (49), the pipeline connecting the fourth communication port of the first clarifier (1) and the external sludge pump (46) is sequentially provided with a fourteenth ball valve (50) and a ball valve (50) from the direction away from the first clarifier (1). The third electronic control valve (51), the pipeline connecting the fourth communication port of the first clarifier (1) and the external tap water pump main pipe (45) and the fourth communication port of the first clarifier (1) and the external discharge The pipelines connected to the mud pump (46) are also connected together through a fourth pipe (52). The fourth pipe (52) is provided with a third electric butterfly valve (53) and an eleventh stop valve (54).
9. A milk-of-lime pipeline system capable of online cleaning according to claim 1, characterized in that: the second communication port of the second clarifier (2) is connected to the external dosing room (47) through a pipeline connection. Together, the third communication port of the second clarifier (2) is connected to the external outlet channel (48) through a pipeline connection, and the fourth communication port of the second clarification tank (2) is connected to the external water outlet channel (48) through a pipeline connection. The external tap water pump main pipe (45) and the external sludge discharge pump (46) are connected together. The fourth communication port of the second clarifier (2) and the external tap water pump main pipe (45) are connected with a twelfth pipe. The stop valve (55) and the fifteenth ball valve (56) are arranged on the pipeline connecting the fourth communication port of the second clarifier (2) and the external sludge pump (46) from the direction away from the second clarifier (2). and the fourth electric control valve (57), the pipeline connecting the fourth communication port of the second clarifier (2) and the external tap water pump main pipe (45) and the fourth communication port of the second clarifier (2) with the outside The pipelines connected to the mud pump (46) are also connected together through a fifth pipe (58). The fifth pipe (58) is provided with a fourth electric butterfly valve (59) and a thirteenth stop valve (60). .
10. A method of using the milk-of-lime pipeline system capable of online cleaning based on any one of claims 1 to 9, characterized in that it includes the following steps:

    When the lime milk pipeline system is in operation, in addition to the first electric control valve (7), the second electric control valve (11), the first electric butterfly valve (41), the second electric butterfly valve (44), and the third electric control valve (51), the third electric butterfly valve (53), the fourth electric control valve (57), the fourth electric butterfly valve (59), the first ball valve (8), the first stop valve (9), the second ball valve (12) , the second stop valve (13), the third ball valve (16), the third stop valve (18), the fourth ball valve (19), the fifth ball valve (21), the sixth ball valve (23) and the seventh ball valve (26 ) are in the normally open state, the first electric control valve (7), the second electric control valve (11), the first electric butterfly valve (41), the second electric butterfly valve (44), the third electric control valve (51), the third electric butterfly valve (53), the fourth electric control valve (57) and the fourth electric butterfly valve (59) change their opening and closing states according to actual needs. The first ball valve (8) and the first stop valve ( 9), the second ball valve (12), the second stop valve (13), the third ball valve (16), the third stop valve (18), the fourth ball valve (19), the fifth ball valve (21), the sixth ball valve (23) and the seventh ball valve (26) are both normally closed;

    When the milk of lime pipeline system is blocked, determine the blockage form of the milk of lime pipeline system based on the phenomenon caused by the blockage;

    If the blockage is in the form of lime milk blockage in the pipeline, close the first electric control valve (7), the second electric control valve (11), the fourth stop valve (24), the fifth stop valve (25), and the first electric butterfly valve ( 41), the second electric butterfly valve (44), the ninth ball valve (31) and the eleventh ball valve (36), and open the first stop valve (9), the second stop valve (13), and the third ball valve (16) , the third stop valve (18), the fourth ball valve (19) and the fifth ball valve (21), and at the same time control the chemical pump (17) to start working, and the chemical pump (17) will add the chemical liquid in the cleaning tank (14) Pour into the milk of lime pipeline system and circulate in the milk of lime pipeline system. At the same time, measure the pH value of the medicinal liquid in the dosing cleaning box (14). If the pH value of the medicinal liquid drops, add If the pH value of the medicinal solution is stable, stop the circulation of the medicinal solution and soak it. After soaking for a certain period of time, open the first electric butterfly valve (41), the second electric butterfly valve (44) and the sixth ball valve (23). Water from the external tap water pump main pipe (45) flushes the lime milk pipeline system, and the flushed liquid flows out into the external collection tank (22);

    If the blockage is caused by blockage at the pump ports of the first feed pump (29) and the second feed pump (34), close the first electronically controlled valve (7), the second electronically controlled valve (11), and the fourth cut-off valve. valve (24), the fifth stop valve (25), the first electric butterfly valve (41) and the second electric butterfly valve (44), and open the first ball valve (8), the second ball valve (12), the third ball valve (16) ), the third stop valve (18), the fourth ball valve (19) and the fifth ball valve (21), and at the same time control the medicine pump (17) to start working, and the medicine pump (17) will add the medicine in the cleaning tank (14) The liquid is pumped into the milk of lime pipeline system and circulates in the milk of lime pipeline system. At the same time, the pH value of the medicinal liquid in the dosing cleaning box (14) is measured. If the pH value of the medicinal liquid drops, replenish it. Add the medicinal solution. If the pH value of the medicinal solution is stable, stop the circulation of the medicinal solution and soak it. After soaking for a certain period of time, open the first electric butterfly valve (41), the second electric butterfly valve (44) and the sixth ball valve (23). The lime milk pipeline system is flushed with water from the external tap water pump main pipe (45), and the flushed liquid flows out into the external collection tank (22).