Air compressor cooler cleaning system and method

Abstract

The invention provides an air compressor cooler cleaning system and method, belongs to the technical field of compressors, and aims to solve the problem of blockage of the air side of an air compressor cooler. The air compressor cooler cleaning system comprises a dosing pipeline, a flushing pipeline, a cleaning main pipe, a dosing device and a controller. And the dosing pipeline and the flushing pipeline are connected in parallel between the air compressor cooling water inlet pipe and the inlet of the cleaning main pipe. The outlet of the cleaning main pipe is connected with at least two cleaning branch pipes. A first valve and a second valve are arranged on the dosing pipeline. The first valve and the second valve are respectively positioned at the upstream and the downstream of the dosing device. And a third valve is arranged on the flushing pipeline. And a control valve is arranged on each cleaning branch pipe. The controller is connected to the dosing device, the first valve, the second valve and the control valve. The air channel of the cooler can be cleaned on the premise that the cooler is not disassembled, and the disassembly and assembly time and the disassembly and assembly cost are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a system and method for cleaning an air compressor cooler. Background Art

[0002] Severe fouling on the air side of an air compressor cooler core can reduce the energy efficiency of the compressed air system and increase power consumption. Traditionally, cleaning and maintenance of air compressor cooler cores requires complete shutdown of the machine and a complete disassembly, cleaning, and reinstallation process performed by professionals. This process is not only tedious and complex, but also extends equipment downtime and increases labor costs. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide an air compressor cooler cleaning system and method, which can clean the cooler air path without disassembling the cooler, thereby reducing disassembly and assembly time and cost.

[0004] To address the above-mentioned problems, the present invention provides an air compressor cooler cleaning system, comprising: a dosing line, a flushing line, a cleaning main pipe, a dosing device, and a controller. The dosing line and the flushing line are connected in parallel between the air compressor cooling water inlet pipe and the inlet of the cleaning main pipe. At least two cleaning branches are connected to the outlet of the cleaning main pipe. Each cleaning branch is connected to the air side of a cooler. The dosing device is disposed on the dosing line. The dosing line is provided with a first valve and a second valve. The first and second valves are located upstream and downstream of the dosing device, respectively. A third valve is provided on the flushing line. A control valve is provided on each cleaning branch pipe. The controller is respectively connected to the dosing device, the first valve, the second valve, the third valve, and the control valve.

[0005] The dosing device includes a dosing tank, a metering pump, a temperature sensor, and a liquid level gauge. The dosing tank is mounted on the dosing line. It is equipped with a heater and a stirrer. The metering pump delivers the chemical into the dosing tank, where it mixes with cooling water to form the cleaning agent. The temperature sensor and liquid level gauge are located in the dosing tank to monitor the temperature and liquid level. A controller is connected to the heater, stirrer, temperature sensor, and liquid level gauge, respectively.

[0006] Among them, the amount of medicine delivered by the metering pump to the dosing barrel needs to be determined according to the after-cooling pressure difference of the cooler: when the after-cooling pressure difference is 0.6-0.8bar, the delivered medicine is 5000-6500g; when the after-cooling pressure difference is 0.8-1.0bar, the delivered medicine is 6500-10000g.

[0007] Among them, the chemicals include descaling agents and corrosion inhibitors.

[0008] The air compressor cooler cleaning system also includes a liquid level probe. The liquid level probe is disposed within the cooler and below the connection between the cleaning branch pipe and the cooler. The controller is connected to the liquid level probe.

[0009] The present invention also provides an air compressor cooler cleaning method, utilizing the above-mentioned air compressor cooler cleaning system, the method comprising the following steps:

[0010] S1. The cooling water and the reagent are mixed in the dosing device to form a cleaning agent;

[0011] S2. Inject the cleaning agent into one of the coolers to be cleaned;

[0012] S3. Repeat the above steps until each cooler to be cleaned is soaked with cleaning agent;

[0013] S4. Allow the cleaning agent to stand in the cooler for a preset period of time, after which the cooler is drained;

[0014] S5. Inject cooling water into the cooler and circulate it for flushing.

[0015] Wherein, step S1 includes:

[0016] S11. Determine the dosage of the agent based on the post-cooling pressure difference of the cooler and deliver the required dosage of the agent to the dosing device;

[0017] S12. Open the first valve, inject cooling water into the dosing device until the preset water level is reached and then close the first valve;

[0018] S13. Heating the cooling water until the temperature reaches a preset value;

[0019] S14. Add the reagent to the dosing device and stir it thoroughly to mix it into a cleaning agent.

[0020] Wherein, step S2 includes:

[0021] S21. Open the second valve and a control valve to inject the cleaning agent in the dosing device into the cooler connected to the control valve;

[0022] S22. When the cleaning agent level in the dosing device drops to a preset level, close the second valve and the control valve.

[0023] Wherein, step S4 includes:

[0024] S41. Allow the cleaning agent to stand in the cooler for 36 to 48 hours;

[0025] S42. Open the automatic drain valve on the cooler, drain the cooler, and then close the automatic drain valve.

[0026] Wherein, step S5 includes:

[0027] S51. Open the third valve and the control valve to inject cooling water into the cooler;

[0028] S52. When the cooling water in the cooler reaches the limit level, close the third valve and the control valve;

[0029] S53. After soaking for the required time, open the automatic drain valve on the cooler to drain;

[0030] S54. Repeat the above steps to circulate and flush the cooler.

[0031] Beneficial effects:

[0032] The air compressor cooler cleaning system provided by the present invention is arranged between the air compressor cooling water inlet pipe and the air side of multiple coolers. It will not affect the cooling system of the air compressor, and there is no need to change the structure of the cooling system or to structurally modify the cooler. The present invention realizes online dosing immersion and online circulation flushing of the air side of the cooler through the coordination of the dosing device, the first valve, the second valve, the third valve, and the control valve, as well as the logical control of the controller, without the need to disassemble the cooler, thereby improving cleaning efficiency and reducing cleaning costs. The present invention supports individual or overall cleaning of the cooler, and cleaning and maintenance can be completed without disassembling the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of an air compressor cooler cleaning system according to an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of a dosing device according to an embodiment of the present invention;

[0035] Figure 3 This is a flow chart of a method for cleaning an air compressor cooler according to an embodiment of the present invention.

[0036] The reference numerals indicate:

[0037] 1. Dosing pipeline; 2. Flushing pipeline; 3. Dosing device; 4. Cleaning main pipe; 5. Cleaning branch pipe; 6. Controller; 7. Air compressor cooling water inlet pipe; 8. Cooler; 9. Liquid level probe;

[0038] 31. Dosing tank; 32. Metering pump; 33. Heater; 34. Agitator; 35. Liquid level gauge; 36. Temperature sensor;

[0039] V1 is the first valve; V2 is the second valve; V3 is the third valve; V4~V6 are all control valves. DETAILED DESCRIPTION

[0040] Furthermore, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0041] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] This embodiment provides an air compressor cooler cleaning system. Figure 1 This is a schematic diagram of an air compressor cooler cleaning system provided in this embodiment.

[0044] like Figure 1 As shown, the air compressor cooler cleaning system of this embodiment includes: a dosing pipeline 1, a flushing pipeline 2, a cleaning main pipe 4, a dosing device 3 and a controller 6. The dosing pipeline 1 and the flushing pipeline 2 are connected in parallel between the air compressor cooling water inlet pipe 7 and the inlet of the cleaning main pipe 4. At least two cleaning branch pipes 5 are connected to the outlet of the cleaning main pipe 4. Each cleaning branch pipe 5 is connected to the gas side of a cooler 8. The dosing device 3 is arranged on the dosing pipeline 1. The dosing pipeline 3 is provided with a first valve V1 and a second valve V2. The first valve V1 and the second valve V2 are respectively located upstream and downstream of the dosing device 3. The flushing pipeline 2 is provided with a third valve V3. Each cleaning branch pipe 5 is provided with a control valve (V4 to V6). The controller 6 is respectively connected to the dosing device 3, the first valve V1, the second valve V2, the third valve V3 and the control valves V4 to V6.

[0045] When the cleaning program is started, the chemical soaking mode is first started: the controller 6 opens the first valve V1, automatically injects water into the dosing device 3, and starts the dosing device 3 at the same time, so that the cooling water and the chemical are mixed in the dosing device 3 according to the set ratio to form a cleaning agent; then the first valve V1 is closed, the second valve V2 and a control valve V4 (or V5, V6) are opened, and the cleaning agent is injected into a cooler 8; when the cleaning agent level in the cooler 8 meets the soaking requirement, the corresponding control valve V4 (or V5, V6) and the second valve V2 are closed; and the above operation is repeated until a sufficient amount of cleaning agent is injected into each cooler 8; then the system is left to stand for a preset time to complete the entire soaking process.

[0046] Then start the clean water flushing mode: the controller 6 first opens the condensing water pipe of the cooler 8 to drain the cleaning agent therein, and then closes the condensing water pipe of the cooler 8; then opens the third valve V3 and the control valves V4~V6 to inject new cooling water into the cooler 8; after standing for a period of time, open the condensing water pipe of the cooler 8 to drain the cooling water therein; then repeat the above operation and perform multiple cycles of flushing to ensure that residual agents and dirt are completely removed.

[0047] The controller 6 of this embodiment may adopt a PLC control system.

[0048] The control valves V4 to V6 of this embodiment are respectively arranged 15 cm in front of the water inlet of a cooler 8 , and each control valve V4 to V6 independently controls the water inlet of a cooler 8 .

[0049] The air compressor cooler cleaning system provided in this embodiment is arranged between the air compressor cooling water inlet pipe 7 and the air side of multiple coolers 8. It will not affect the cooling system of the air compressor, and there is no need to change the structure of the cooling system or to modify the structure of the cooler. This embodiment realizes online dosing immersion and online circulation flushing of the air side of the cooler 8 through the coordination of the dosing device 3, the first valve V1, the second valve V2, the third valve V3, the control valves V4 to V6, and the logical control of the controller 6. There is no need to disassemble the cooler 8, which improves the cleaning efficiency and reduces the cleaning cost. This embodiment supports the cleaning of the cooler 8 individually or as a whole, and cleaning and maintenance can be completed without disassembling the equipment.

[0050] Figure 2 This is a schematic diagram of a dosing device provided in this embodiment. Figure 2As shown, the dosing device 3 includes a dosing tank 31, a metering pump 32, a temperature sensor 36, and a liquid level gauge 35. The dosing tank 31 is disposed on the dosing pipeline 1. A heater 33 and an agitator 34 are provided in the dosing tank 31. The metering pump 32 is used to deliver the agent to the dosing tank 31 so that the agent mixes with cooling water in the dosing tank 31 to form a cleaning agent. The temperature sensor 36 and the liquid level gauge 35 are disposed in the dosing tank 31 to monitor the temperature and liquid level in the dosing tank 31. The controller 6 is connected to the heater 33, the agitator 34, the temperature sensor 36, and the liquid level gauge 35, respectively.

[0051] The dosing device 3 of this embodiment includes a dosing barrel 31, a metering pump 32, a temperature sensor 36, and a liquid level gauge 35. When the cleaning process is initiated, the chemical soaking mode is first activated: the controller 6 opens the first valve V1 and automatically fills the dosing barrel 31 with water. The controller 6 uses the liquid level gauge 35 to monitor the water level in the dosing barrel 31. When the water level reaches a preset value, the controller closes the first valve V1, stopping the water injection. The heater 33 is then activated to heat the cooling water in the dosing barrel 31. The controller 6 uses the temperature sensor 36 to monitor the water temperature in the dosing barrel 31. When the temperature reaches a preset value, the controller controls the heater 33 to shut off, stopping heating. The metering pump 32 is then activated to deliver the required amount of chemical to the dosing barrel 31, and the agitator 34 is activated to stir the chemical and water, thoroughly mixing them to form a cleaning solution.

[0052] The heater 33 of this embodiment may be a heating rod, and the liquid level meter 35 may be a float type liquid level sensor.

[0053] The dosing device 3 of this embodiment includes a dosing barrel 31, a metering pump 32, a temperature sensor 36 and a liquid level meter 35, and the controller 6 is connected to the heater 33, the agitator 34, the temperature sensor 36 and the liquid level meter 35 respectively. It can realize automatic water injection, heating, dispensing and stirring operations, and can monitor and control the temperature and liquid level in real time. It is easy to use and has a high degree of automation. The controller 6 of this embodiment adjusts the power of the heater 33 in real time to prevent temperature overshoot and improve energy efficiency. The dosing barrel 31 of this embodiment is provided with an agitator 34, which can ensure that the agent is evenly dissolved and avoid precipitation. In addition, this embodiment supports the flexible replacement of different cleaning agents, which is convenient for adjusting the cleaning plan according to the working conditions.

[0054] Among them, the amount of medicine delivered by the metering pump 32 to the dosing barrel 1 needs to be determined according to the after-cooling pressure difference of the cooler 8: when the after-cooling pressure difference is 0.6-0.8 bar, 5000-6500g of medicine is delivered; when the after-cooling pressure difference is 0.8-1.0 bar, 6500-10000g of medicine is delivered.

[0055] The after-cooling pressure difference refers to the difference between the pipeline outlet pressure and the three-stage outlet pressure. The pipeline outlet pressure is the output pressure of the compressed air after cooling through the cooler 8, and the three-stage outlet pressure is the pressure of the compressed air when it leaves the final cylinder (high temperature state). When the after-cooling pressure difference is less than 0.6 bar, it means that the airflow resistance is small, the cooler 8 is unobstructed, and there is no excessive scaling. When the after-cooling pressure difference is 0.6-0.8 bar, it means that the airflow resistance is large, and the cooler 8 is blocked. At this time, the amount of medicine is 5000-6500g. When the after-cooling pressure difference is 0.8-1.0 bar, it means that the airflow resistance is large and the cooler 8 is heavily blocked. At this time, the amount of medicine is 6500-10000g.

[0056] The present embodiment determines the amount of reagent to be used according to the post-cooling pressure difference of the cooler 8, thereby realizing dynamic allocation of the cleaning agent, avoiding the influence of insufficient reagent on the cleaning effect, and also avoiding the waste of resources and excessive corrosion caused by excessive reagent.

[0057] Among them, the chemicals include descaling agents and corrosion inhibitors.

[0058] In this embodiment, the main components of the agent are aminosulfonic acid and a surface leavening agent. In other embodiments, the main components of the agent can also be EDTA chelating agent + corrosion inhibitor, which is suitable for cleaning high calcium and magnesium scale layers.

[0059] Among them, Figure 1 As shown, the air compressor cooler cleaning system further includes a liquid level probe 9. The liquid level probe 9 is disposed in the cooler 8 and below the connection between the cleaning branch pipe 5 and the cooler 8. The controller 6 is connected to the liquid level probe 9.

[0060] In some examples, the liquid level probe 9 is disposed 10 cm below the connection between the cleaning branch pipe 5 and the cooler 8 .

[0061] In this embodiment, a liquid level probe 9 is installed within cooler 8, below the connection between cleaning branch pipe 5 and cooler 8, to monitor the cleaning agent level within cooler 8. A controller 6 is connected to the liquid level probe 9. When the cleaning agent level within cooler 8 reaches the required level, it controls the second valve V2 and control valves V4-V6 to close, preventing the cleaning agent level from being too high, causing backflow and overflow. This also prevents the cleaning agent level within cooler 8 from being insufficient, preventing the interior of cooler 8 from being fully soaked.

[0062] This embodiment also provides an air compressor cooler cleaning method, which utilizes the air compressor cooler cleaning system in the above embodiment. Figure 3 This is a flow chart of a method for cleaning an air compressor cooler provided in this embodiment.

[0063] like Figure 3 As shown, the air compressor cooler cleaning method of this embodiment includes the following steps:

[0064] S1. The cooling water and the agent are mixed in the dosing device 3 to form a cleaning agent;

[0065] S2. The cleaning agent is injected into one of the coolers to be cleaned 8;

[0066] S3. Repeat the above steps until each cooler 8 to be cleaned is soaked with cleaning agent;

[0067] S4. Allow the cleaning agent to stand in the cooler 8 for a preset period of time, after which the cooler 8 is emptied;

[0068] S5. Inject cooling water into the cooler 8 and circulate and flush it.

[0069] In this embodiment, the air path of the cooler 8 is cleaned without disassembling the cooler 8, thereby reducing the disassembly and assembly time and labor costs.

[0070] The cleaning method of this embodiment utilizes the air compressor cooler cleaning system in the above embodiment, and therefore has all the above beneficial effects, which will not be described in detail here.

[0071] Wherein, step S1 includes:

[0072] S11 determines the amount of agent used according to the post-cooling pressure difference of the cooler 8, and delivers the required amount of agent to the dosing device 3;

[0073] Specifically, when the after-cooling pressure difference of cooler 8 is 0.6-0.8 bar, add 5000-6500g of reagent; when the after-cooling pressure difference is 0.8-1.0 bar, add 6500-10000g of reagent (after-cooling pressure difference = pipeline outlet pressure - third-stage outlet pressure).

[0074] S12. Open the first valve V1 and inject cooling water into the dosing device 3 until the preset water level is reached and then close the first valve V1;

[0075] Specifically, the dosing barrel 31 has a capacity of 250L, a barrel height of about 850mm, and a barrel diameter of 680mm. A liquid level gauge 35 is added to the dosing barrel 31. When the cooler 8 needs to be cleaned, the first valve V1 is opened and cooling water is injected into the dosing barrel 31. When the liquid level reaches 750mm, the water injection is stopped (the capacity of the cooler is 200L, and when the water level is at 680mm, it is about 200L of water).

[0076] S13. Heating the cooling water until the temperature reaches a preset value;

[0077] Specifically, when the water temperature in the dosing barrel 31 reaches 80° C., heating is stopped to ensure the best cleaning effect.

[0078] S14. Add the reagent to the dosing device 3 and stir it thoroughly to mix it into a cleaning agent.

[0079] Specifically, the required amount of medicine is determined according to the post-cooling pressure difference of the cooler 8, and then the metering pump 32 is controlled to accurately deliver the medicine to the dosing barrel 31, and the agitator 34 is started to mix the medicine with the water in the dosing barrel 31 according to the set ratio to form a cleaning agent.

[0080] Wherein, step S2 includes:

[0081] S21. Open the second valve V2 and a control valve V4 (or V5, V6) to inject the cleaning agent in the dosing device 3 into the cooler 8 connected to the control valve V4 (or V5, V6);

[0082] Specifically, since the capacity of the dosing barrel 31 is limited, in order to ensure that the cleaning agent in each cooler 8 meets the soaking requirement, the coolers 8 are injected one by one.

[0083] S22. When the cleaning agent level in the dosing device 3 drops to a preset level, the second valve V2 and the control valve V4 (or V5, V6) are closed.

[0084] Specifically, when the liquid level meter 35 detects that the liquid level in the dosing barrel 31 drops to 50 mm, the second valve V2 and the control valve V4 (or V5, V6) are closed, and new cleaning agent is re-configured in the dosing barrel 31 for injection into the next cooler 8.

[0085] Wherein, step S4 includes:

[0086] S41. Allow the cleaning agent to stand in the cooler 8 for 36 to 48 hours;

[0087] Specifically, the scale in the gas tester of the cooler 8 can be dissolved by soaking for 36-48 hours. Compared with the traditional cleaning method, this embodiment significantly improves the cleaning efficiency.

[0088] S42. Open the automatic drain trap on the cooler 8, drain the cooler 8, and then close the automatic drain trap.

[0089] Specifically, drainage is controlled by the existing automatic trap on the cooler 8. When filling water, the automatic trap is closed, and when draining water, the automatic trap is opened, without the need to set up additional drainage pipes and valves.

[0090] Wherein, step S5 includes:

[0091] S51. Open the third valve V3 and the control valves V4 to V6 to inject cooling water into the cooler 8;

[0092] Specifically, after the drug soaking water is drained, the third valve V3 and all the control valves V4 to V6 are opened, the steam trap at the bottom of each cooler 8 is closed, and new water is injected into multiple coolers 8 at the same time to improve the flushing efficiency.

[0093] S52. When the cooling water in the cooler 8 reaches the limit level, close the third valve V3 and the control valves V4 to V6;

[0094] Specifically, when the cooling water in each cooler 8 reaches the height of the liquid level probe 9, the third valve V3 and all the control valves V4 to V6 are closed.

[0095] S53. After soaking for the required time, open the automatic drain valve on the cooler 8 to drain;

[0096] Specifically, soak for about 5 minutes to fully mix the residual medicine and dirt in the cooler 8 with the cooling water. Afterwards, open the automatic drain valve on the cooler 8 to drain the water so that the residual medicine and dirt are discharged together with the cooling water.

[0097] S54. Repeat the above steps to perform cyclic flushing on the cooler 8.

[0098] Specifically, perform three cycles of flushing to ensure that residual chemicals and dirt are completely removed.

[0099] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0100] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An air compressor cooler cleaning system, characterized in that: include: Dosing pipelines, flushing pipelines, cleaning mains, dosing devices and controllers; The dosing pipeline and the flushing pipeline are connected in parallel between the cooling water inlet pipe of the air compressor and the inlet of the cleaning main pipe; at least two cleaning branches are connected to the outlet of the cleaning main pipe; each of the cleaning branches is connected to the gas side of a cooler; The dosing device is arranged on the dosing pipeline; The dosing pipeline is provided with a first valve and a second valve; the first valve and the second valve are respectively located upstream and downstream of the dosing device; A third valve is provided on the flushing pipeline; Each cleaning branch pipe is provided with a control valve; The controller is respectively connected to the dosing device, the first valve, the second valve, the third valve and the control valve.

2. The air compressor cooler cleaning system according to claim 1, characterized in that: The dosing device includes: a dosing barrel, a metering pump, a temperature sensor and a liquid level meter; The dosing barrel is arranged on the dosing pipeline; a heater and a stirrer are provided in the dosing barrel; The metering pump is used to deliver the agent to the dosing barrel so that the agent and cooling water are mixed in the dosing barrel to form a cleaning agent; The temperature sensor and the liquid level meter are arranged in the dosing barrel to monitor the temperature and liquid level in the dosing barrel; The controller is connected to the heater, the stirrer, the temperature sensor and the liquid level meter respectively.

3. The air compressor cooler cleaning system according to claim 2, characterized in that: The amount of medicine delivered by the metering pump to the dosing barrel needs to be determined according to the after-cooling pressure difference of the cooler: When the post-cooling pressure difference is 0.6-0.8 bar, 5000-6500 g of the medicine is delivered; When the post-cooling pressure difference is 0.8-1.0 bar, 6500-10000 g of the medicine is delivered.

4. The air compressor cooler cleaning system according to claim 2 or 3, characterized in that: The medicine includes a descaling agent and a corrosion inhibitor.

5. The air compressor cooler cleaning system according to claim 1, characterized in that: Also includes: Liquid level probe; The liquid level probe is arranged in the cooler and is located below the connection between the cleaning branch pipe and the cooler; The controller is connected to the liquid level probe.

6. A method for cleaning an air compressor cooler, using the air compressor cooler cleaning system according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: S1. The cooling water and the agent are mixed in the dosing device to form a cleaning agent; S2. The cleaning agent is injected into one of the coolers to be cleaned; S3. Repeat the above steps until each cooler to be cleaned is soaked with the cleaning agent; S4. Allow the cleaning agent to stand in the cooler for a preset period of time, after which the cooler is emptied; S5. Inject cooling water into the cooler and perform circulating flushing.

7. The air compressor cooler cleaning method according to claim 6, characterized in that: The step S1 comprises: S11. Determine the amount of the agent to be used according to the post-cooling pressure difference of the cooler, and deliver the required amount of the agent to the dosing device; S12. Open the first valve, inject cooling water into the dosing device until the preset water level is reached and then close the first valve; S13. Heating the cooling water until the temperature reaches a preset value; S14. Add the reagent to the dosing device and stir it thoroughly to mix it into a cleaning agent.

8. The air compressor cooler cleaning method according to claim 6, characterized in that: The step S2 comprises: S21. Open the second valve and one of the control valves to inject the cleaning agent in the dosing device into the cooler connected to the control valve; S22. When the cleaning agent liquid level in the dosing device drops to a preset liquid level, close the second valve and the control valve.

9. The air compressor cooler cleaning method according to claim 6, characterized in that: The step S4 comprises: S41. Allow the cleaning agent to stand in the cooler for 36 to 48 hours; S42. Open the automatic drain trap on the cooler, drain the cooler, and then close the automatic drain trap.

10. The air compressor cooler cleaning method according to claim 6, characterized in that: The step S5 comprises: S51. Open the third valve and the control valve to inject cooling water into the cooler; S52. When the cooling water in the cooler reaches the limit level, closing the third valve and the control valve; S53. After soaking for the required time, open the automatic drain valve on the cooler to drain; S54. Repeat the above steps to perform cyclic flushing on the cooler.

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