Plate heat exchanger cleaning system, plate heat exchanger and cleaning method

Abstract

The invention relates to the technical field of heat exchangers, in particular to a plate heat exchanger cleaning system, a plate heat exchanger and a cleaning method. The fluid monitoring devices are installed at an inlet and an outlet of the plate heat exchanger respectively, connected with the control device and used for monitoring fluid data of the inlet and the outlet of the plate heat exchanger and transmitting the data to the control device. The high-pressure cleaning device is arranged between plate channels of the plate heat exchanger, is connected with the control device and is used for acquiring an instruction of the control device and cleaning the plate channels of the plate heat exchanger; the control device is used for receiving the fluid data of the fluid monitoring device and generating a cleaning instruction to the high-pressure cleaning device. Real-time monitoring and a response mechanism are combined, the fluid monitoring device, the high-pressure cleaning device and the control device are combined for control, the self-cleaning function of the plate heat exchanger is achieved, and the problems that an existing plate heat exchanger is difficult to clean and low in efficiency are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to a plate heat exchanger cleaning system, a plate heat exchanger and a cleaning method. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It is widely used in various fields such as chemical industry, energy, power, and medicine. A heat exchanger is also called a heat exchanger. Its working principle is mainly based on the principle of heat conduction. The hot and cold fluids are separated by a solid partition, and the heat is transferred from the hot fluid to the cold fluid through the partition, thereby realizing the heat exchange. This type of equipment is usually filled with water or other media in a large closed container, and a pipe passes through the container to allow hot water to flow through the pipe. Due to the temperature difference between the hot water in the pipe and the cold and hot water in the container, heat exchange will be formed, that is, the heat of the high-temperature object is always transferred to the low-temperature object. There are many types of heat exchangers, including shell and tube heat exchangers, coil heat exchangers, shell and tube heat exchangers, threaded plate heat exchangers, volumetric heat exchangers, heat pipe heat exchangers, and plate heat exchangers. Among them, the plate heat exchanger is a kind of heat exchanger composed of a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat is exchanged through the plates. The basic components of the plate heat exchanger include plate heat exchanger plates, plate heat exchanger sealing gaskets, fixed clamping plates, movable clamping plates, clamping bolts, upper guide rods, lower guide rods, and rear columns. Due to the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, the plate heat exchanger is widely used in the chemical industry, textile industry, nonferrous industry, machinery manufacturing, central heating, shipbuilding industry, air conditioning and refrigeration, food industry, steel industry, electric power industry, oil industry, paper industry, and medicine.

[0003] However, in the long-term operation process, especially when the treated medium contains a high concentration of suspended solids, particulate matter or chemical precipitates. These impurities will form a dirt layer between the plates of the plate heat exchanger, gradually accumulate and cause the flow channel cross-section to decrease, thereby increasing the resistance of the fluid through the heat exchanger. As the pressure drop increases, the energy required to pump the fluid also increases, which not only increases energy consumption, but may also cause the heat transfer efficiency of the heat exchanger to decrease. In severe cases, flow channel blockage will prevent part or all of the fluid from passing, affecting the heat exchange efficiency and stability of the entire system. In addition, scaling and blockage may also cause local overheating of the heat exchanger, increasing equipment damage and accident risks. Therefore, regular cleaning and maintenance are essential to maintain efficient operation of plate heat exchangers.

[0004] The existing plate heat exchanger is cleaned manually, which is labor-intensive, time-consuming and inefficient, resulting in long downtime of the entire unit and poor economic benefits. Summary of the invention

[0005] In view of the problem that the plate heat exchanger in the prior art is difficult to clean and has low efficiency, the present invention provides a plate heat exchanger cleaning system, a plate heat exchanger and a cleaning method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides a plate heat exchanger cleaning system, comprising a fluid monitoring device, a control device and a high-pressure cleaning device; The fluid monitoring device is installed at the inlet and outlet of the plate heat exchanger respectively and is connected to the control device to monitor the inlet and outlet fluid data of the plate heat exchanger and transmit it to the control device; The high-pressure cleaning device is arranged between the plate channels of the plate heat exchanger and is connected to the control device, and is used to obtain instructions from the control device and clean the plate channels of the plate heat exchanger; The control device is used to receive fluid data from the fluid monitoring device and generate a cleaning instruction to the high-pressure cleaning device.

[0007] Optionally, the fluid monitoring device includes a pressure sensor, a temperature sensor and a flow rate sensor.

[0008] Optionally, the high-pressure cleaning device includes a cleaning liquid storage tank and a cleaning liquid pump and a nozzle connected to the cleaning liquid storage tank in sequence, and the nozzle is arranged between the plate channels of the plate heat exchanger; the cleaning liquid pump is provided with cleaning liquid inside and is connected to the control device.

[0009] Optionally, the nozzle is a rotatable nozzle.

[0010] Optionally, an electric control valve is provided between the cleaning liquid pump and the nozzle, and the electric control valve is connected to the control device.

[0011] Optionally, the high-pressure cleaning device further comprises an air compressor, a gas outlet of the air compressor is connected to a nozzle, and the air compressor is connected to a control device.

[0012] Optionally, a gas control valve is provided between the gas outlet of the air compressor and the nozzle, and the gas control valve is connected to the control device.

[0013] Optionally, it also includes a circulating filtration device, which includes a waste liquid collection tank arranged below the plate channel of the plate heat exchanger, and the output end of the waste liquid collection tank is connected to a filtration structure for filtering out particles and dirt in the waste liquid; the output end of the filtration structure is connected to a cleaning liquid storage tank.

[0014] The present invention provides a method for cleaning a plate heat exchanger using the above cleaning system, comprising: Obtain the fluid data at the inlet and outlet of the plate heat exchanger; According to the fluid data at the inlet and outlet of the plate heat exchanger, determine whether dirt accumulation occurs; If dirt accumulation occurs, the plate heat exchanger should be cleaned according to the inlet and outlet fluid data.

[0015] A plate heat exchanger comprises the plate heat exchanger cleaning system.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a plate heat exchanger cleaning system. By installing fluid monitoring devices at the inlet and outlet of the plate heat exchanger, the system can monitor key data of the fluid (such as temperature, pressure, flow rate change, etc.) in real time. These data are essential for evaluating the operating efficiency and pollution degree of the plate heat exchanger. By setting a control device to receive and process the key data of the real-time monitoring fluid, it is possible to quickly identify whether there are signs of dirt accumulation or performance degradation in the plate heat exchanger, thereby intelligently triggering the cleaning instruction. By setting a high-pressure cleaning device between the plate channels of the plate heat exchanger, the plate channels of the plate heat exchanger are cleaned according to the instructions of the control device. This combination of real-time monitoring and response mechanism can greatly reduce the disadvantages of manual cleaning, improve the timeliness and efficiency of cleaning, and can be cleaned without affecting production, reducing downtime, and has high flexibility and adaptability. The system not only improves the operating efficiency of the heat exchanger, but also reduces maintenance costs and operating risks, and provides an efficient and environmentally friendly solution for the cleaning of industrial heat exchangers.

[0017] The fluid monitoring device includes a pressure sensor, a temperature sensor and a flow rate sensor, which are used to monitor the pressure, temperature and fluid flow rate of the inlet and outlet of the plate heat exchanger in real time.

[0018] The high-pressure cleaning device includes a cleaning liquid storage tank, a cleaning liquid pump and a nozzle connected to the cleaning liquid storage tank in sequence. The nozzle is arranged between the plate channels of the plate heat exchanger; the cleaning liquid pump is provided with cleaning liquid inside and is connected to the control device. After the cleaning liquid is pressurized by the cleaning liquid pump, it is sprayed between the plate channels of the plate heat exchanger through the nozzle in a high-pressure form. The high-pressure spraying can ensure that the cleaning liquid penetrates into the dirt layer, effectively removes the stubborn dirt attached to the plate, and realizes intelligent control cleaning.

[0019] The nozzle is a rotatable nozzle, which can ensure that the cleaning liquid is evenly distributed between the plate channels of the plate heat exchanger during the cleaning process. This design not only expands the coverage of the cleaning liquid, but also reduces the cleaning dead corners, thereby improving the cleaning efficiency.

[0020] An electric control valve is arranged between the cleaning liquid pump and the nozzle. The electric control valve is connected to the control device. The electric control valve can accurately adjust the flow of cleaning liquid from the cleaning liquid pump to the nozzle according to the instructions of the control device, ensuring the stability of the pressure and flow of the cleaning liquid at the nozzle, thereby improving the accuracy and consistency of cleaning.

[0021] The high-pressure cleaning device also includes an air compressor, the gas outlet of the air compressor is connected to the nozzle, and the air compressor is connected to the control device. The high-pressure airflow provided by the air compressor can be sprayed onto the cleaned surface together with the cleaning liquid to form a strong flushing force, which can more effectively remove stubborn dirt and improve the cleaning efficiency and quality. At the same time, after the cleaning is completed, the inter-plate channels of the cleaned plate heat exchanger can be further purged to further improve the cleaning efficiency and cleaning effect.

[0022] A gas control valve is provided between the gas outlet of the air compressor and the nozzle, and the gas control valve is connected to the control device. The gas control valve can accurately adjust the gas flow and pressure from the air compressor to the nozzle, ensuring that the blown gas forms a stable jet at the nozzle, thereby improving the accuracy and efficiency of cleaning.

[0023] It also includes a circulating filter device, which includes a waste liquid collection tank arranged below the plate channel of the plate heat exchanger, and the output end of the waste liquid collection tank is connected to a filter structure for filtering out particles and dirt in the waste liquid; the output end of the filter structure is connected to a cleaning liquid storage tank. Through the circulating filter device, the waste liquid below the plate channel of the plate heat exchanger can be collected, filtered and processed, and after removing the particles and dirt therein, it is re-injected into the cleaning liquid storage tank to achieve the reuse of the waste liquid. This helps to reduce the cost of using the cleaning liquid and improve resource utilization.

[0024] The present invention also provides a method for cleaning a plate heat exchanger using the above-mentioned cleaning system. The method obtains the fluid data of the inlet and outlet of the plate heat exchanger, and determines whether dirt accumulation occurs based on the fluid data of the inlet and outlet of the plate heat exchanger; if dirt accumulation occurs, the plate heat exchanger is cleaned based on the fluid data of the inlet and outlet. The method is combined with the control device of the cleaning system to realize automatic control. When the fluid data reaches the preset dirt accumulation threshold, the control device can automatically start the cleaning program without manual intervention, which helps to reduce labor costs and improve management efficiency. By accurately judging dirt accumulation and formulating personalized cleaning plans, the method can reduce unnecessary consumption of cleaning fluid and water resources. At the same time, this helps to reduce energy consumption and emissions during the cleaning process, which meets the requirements of environmental protection and sustainable development. The method is simple and easy to implement, and provides a more scientific, efficient and environmentally friendly solution for the cleaning and maintenance of plate heat exchangers.

[0025] A plate heat exchanger includes the above-mentioned plate heat exchanger cleaning system. The plate heat exchanger can monitor its own dirt accumulation in real time, and clean the plate channel of the plate heat exchanger as needed according to the monitoring data, effectively remove the accumulated dirt and impurities, ensure the smoothness of heat transfer, and avoid the decrease in heat exchange efficiency caused by dirt blockage. The plate heat exchanger has a simple structure, low modification cost, good stability, low energy consumption and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a plate heat exchanger cleaning system of the present invention.

[0027] Figure 2 The present invention is a cleaning flow chart of a plate heat exchanger cleaning system.

[0028] Figure 3 The present invention is a flow chart of a method for cleaning a plate heat exchanger.

[0029] Among them, 1-gas control valve, 2-main control valve, 3-nozzle, 4-waste liquid collection tank, 5-filtration structure, 6-filtrate pump, 7-filtrate control valve, 8-cleaning liquid storage tank, 9-air compressor, 10-control device, 11-electric control valve, 12-cleaning liquid pump, 13-fluid monitoring device. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0037] Example 1 See also Figure 1 , the present invention discloses a plate heat exchanger cleaning system, including a fluid monitoring device 13, a control device 10 and a high-pressure cleaning device; The control device 10 is used to receive fluid data from the fluid monitoring device and generate a cleaning instruction to the high-pressure cleaning device; The fluid monitoring device 1 is installed at the inlet and outlet of the plate heat exchanger respectively and connected to the control device 10, and is used to monitor the inlet and outlet fluid data of the plate heat exchanger and transmit it to the control device, including a pressure sensor, a temperature sensor and a flow rate sensor, and the pressure sensor, the temperature sensor and the flow rate sensor are all connected to the control device 10; The high-pressure cleaning device is arranged between the plate channels of the plate heat exchanger and is connected to the control device 10, and is used to obtain the control device instructions and clean the plate channels of the plate heat exchanger, including a cleaning liquid storage tank 8 and an air compressor 9, the cleaning liquid storage tank 8 is connected with a cleaning liquid pump 12, an electric control valve 11 and a nozzle 3 in sequence, the nozzle 3 is a rotatable nozzle, and is arranged between the plate channels of the plate heat exchanger; the cleaning liquid pump 12 is provided with cleaning liquid inside; the electric control valve 11 and the cleaning liquid pump 12 are both connected to the control device 10; the gas outlet of the air compressor 9 is connected to the nozzle 3, and a gas control valve 1 is arranged between the nozzle 3, and the gas control valve 1 is connected to the control device 10; the input end of the nozzle 3 is provided with a main control valve 2, and the main control valve 2 is connected to the control device 10.

[0038] By combining real-time monitoring with a response mechanism, the system can greatly reduce the disadvantages of manual cleaning, improve the timeliness and efficiency of cleaning, and can perform cleaning without affecting production, reducing downtime, and has high flexibility and adaptability. The system not only improves the operating efficiency of the heat exchanger, but also reduces maintenance costs and operational risks, providing an efficient and environmentally friendly solution for the cleaning of industrial heat exchangers.

[0039] Example 2 See also Figure 1 , the present invention discloses a plate heat exchanger cleaning system, including a fluid monitoring device 13, a control device 10, a high-pressure cleaning device and a circulation filtering device; The control device 10 is used to receive fluid data from the fluid monitoring device and generate a cleaning instruction to the high-pressure cleaning device; The fluid monitoring device 1 is installed at the inlet and outlet of the plate heat exchanger respectively and connected to the control device 10, and is used to monitor the inlet and outlet fluid data of the plate heat exchanger and transmit it to the control device, including a pressure sensor, a temperature sensor and a flow rate sensor, and the pressure sensor, the temperature sensor and the flow rate sensor are all connected to the control device 10; The high-pressure cleaning device is arranged between the plate channels of the plate heat exchanger and is connected to the control device 10, and is used to obtain the control device instructions and clean the plate channels of the plate heat exchanger, including a cleaning liquid storage tank 8 and an air compressor 9, the cleaning liquid storage tank 8 is connected with a cleaning liquid pump 12, an electric control valve 11 and a nozzle 3 in sequence, the nozzle 3 is a rotatable nozzle, and is arranged between the plate channels of the plate heat exchanger; the cleaning liquid pump 12 is provided with cleaning liquid inside; the electric control valve 11 and the cleaning liquid pump 12 are both connected to the control device 10; the gas outlet of the air compressor 9 is connected to the nozzle 3, and a gas control valve 1 is arranged between the nozzle 3, and the gas control valve 1 is connected to the control device 10; the input end of the nozzle 3 is provided with a main control valve 2, and the main control valve 2 is connected to the control device 10.

[0040] The circulating filtering device is used to recover the cleaning liquid and filter the dirt that falls off during the cleaning process, so as to realize the recycling of the cleaning liquid and reduce environmental pollution and costs. It includes a waste liquid collection tank 4 arranged below the plate channel of the plate heat exchanger. The output end of the waste liquid collection tank 4 is connected to a filtering structure 5 for filtering out particles and dirt in the waste liquid; the output end of the filtering structure 5 is connected to a filtrate pump 6 and a filtrate control valve 7 in sequence, and the output end of the filtrate control valve 7 is connected to a cleaning liquid storage tank 8, and the cleaning liquid storage tank 8 is connected to a control device 10.

[0041] See also Figure 2 , the system first obtains the fluid data of the inlet and outlet of the plate heat exchanger through high-precision sensors, including key parameters such as temperature, pressure, and flow rate. These data will be transmitted to the control device 10 in real time for analysis to determine whether there is a deviation. If a deviation occurs, the system will further analyze the size and trend of the deviation to determine whether there is dirt accumulation. According to the size of the deviation, the system can accurately estimate the amount of dirt accumulation and then determine the most appropriate cleaning strategy. For example, slight dirt accumulation may only require simple physical flushing, while severe dirt may require deep cleaning with chemical cleaning agents. After determining the cleaning strategy, the system will automatically start the corresponding cleaning program to comprehensively clean the plate heat exchanger. Through automation technology, the cleaning process can not only improve the cleaning efficiency, but also reduce manual intervention, ensuring the consistency and reliability of the cleaning process. This not only helps to extend the service life of the heat exchanger, but also maintains its efficient heat exchange performance, ensuring that the equipment always maintains a good working condition during long-term operation.

[0042] See also Figure 3 The present invention provides a method for cleaning a plate heat exchanger using the above cleaning system, comprising: S1: Obtain the fluid data of the inlet and outlet of the plate heat exchanger; S2: Determine whether dirt accumulation occurs based on the fluid data at the inlet and outlet of the plate heat exchanger; S3: If dirt accumulation occurs, clean the plate heat exchanger according to the inlet and outlet fluid data.

[0043] This method is combined with the control device of the cleaning system to achieve automatic control. The system is equipped with high-precision sensors that can monitor various data of the fluid in real time, such as temperature, pressure, flow rate, and degree of dirt accumulation. When these data reach the preset dirt accumulation threshold, the control device will automatically start the cleaning program according to the preset program without manual intervention, thereby greatly reducing labor costs and improving management efficiency. By accurately judging the dirt accumulation situation and selecting the most appropriate cleaning agent, cleaning time and cleaning method according to the actual use of the equipment and the type of dirt, this method can reduce unnecessary consumption of cleaning fluid and water resources, and at the same time, this helps to reduce energy consumption and emissions during the cleaning process, meeting the requirements of environmental protection and sustainable development. In addition, the operation process of this method is simple and easy, without the need for complex equipment and cumbersome steps. It is only necessary to enter the relevant parameters and thresholds in the system. In the automatic cleaning system of the plate heat exchanger, the setting of parameters and thresholds is the key. The temperature threshold of the cleaning liquid in the cleaning liquid storage tank 8 is usually set at 40℃~60℃ to ensure the cleaning effect while avoiding equipment damage; the pressure threshold of the nozzle 3 is generally 0.1~0.2MPa, which can effectively flush the dirt without damaging the heat exchanger plate of the plate heat exchanger; the flow threshold of the cleaning liquid pump 12 is set according to the size and structure of the heat exchanger, such as the flow rate of general equipment is set to 10~15L / min to ensure uniform distribution of the cleaning liquid. The dirt accumulation threshold is set by monitoring the degree of decrease in heat transfer efficiency. When the heat transfer efficiency decreases by 10%~15%, the cleaning program is started (the heat transfer efficiency is obtained through the fluid data at the inlet and outlet of the plate heat exchanger). The cleaning time threshold is set according to the degree of dirt, 30~60min for light dirt and 1-2h for heavy dirt. During the acid cleaning and alkali cleaning processes, the pH value thresholds are controlled at 2~3 and 11~12 respectively. When the preset value is reached, it means that the chemical reaction is completed, and automatic cleaning control can be realized. Moreover, the system also has good compatibility and scalability, and can be easily integrated with other equipment and systems. The present invention also provides a plate heat exchanger, including the above-mentioned plate heat exchanger cleaning system. The plate heat exchanger can monitor its own dirt accumulation in real time, and the data standards for monitoring the dirt accumulation of the heat exchanger mainly include corrosion rate, scaling rate and dirt thermal resistance. The plate channel of the plate heat exchanger is cleaned as needed to effectively remove the accumulated dirt and impurities, ensure the smoothness of heat transfer, and avoid the decrease in heat exchange efficiency caused by dirt blockage. The plate heat exchanger has a simple structure, low modification cost, good stability, low energy consumption and long service life.

[0044] In summary, the present invention provides a plate heat exchanger cleaning system, a plate heat exchanger and a cleaning method. By combining real-time monitoring with a response mechanism, and utilizing the combined control of a fluid monitoring device, a high-pressure cleaning device and a control device, the self-cleaning function of the plate heat exchanger is realized. The entire cleaning process does not require manual intervention, reducing operational risks and labor intensity. The design of the system allows cleaning without stopping the operation of the heat exchanger, thereby improving production efficiency. The system is suitable for plate heat exchangers of various sizes and types, and has broad industrial application prospects. Through this automated cleaning method, the cleanliness of the heat exchanger can be significantly improved, the service life of the equipment can be extended, and its continuous and efficient heat exchange performance can be ensured.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and substitutions, and these modifications and substitutions are also within the scope of protection covered by the claims.

Claims

1. A plate heat exchanger cleaning system, characterized in that: It includes a fluid monitoring device, a control device and a high-pressure cleaning device; The fluid monitoring device is installed at the inlet and outlet of the plate heat exchanger respectively and is connected to the control device to monitor the inlet and outlet fluid data of the plate heat exchanger and transmit it to the control device; The high-pressure cleaning device is arranged between the plate channels of the plate heat exchanger and is connected to the control device, and is used to obtain instructions from the control device and clean the plate channels of the plate heat exchanger; The control device is used to receive fluid data from the fluid monitoring device and generate a cleaning instruction to the high-pressure cleaning device.

2. The plate heat exchanger cleaning system according to claim 1, characterized in that: The fluid monitoring device includes a pressure sensor, a temperature sensor and a flow rate sensor.

3. The plate heat exchanger cleaning system according to claim 1, characterized in that: The high-pressure cleaning device includes a cleaning liquid storage tank and a cleaning liquid pump and a nozzle connected to the cleaning liquid storage tank in sequence, wherein the nozzle is arranged between the plate channels of the plate heat exchanger; the cleaning liquid pump is provided with cleaning liquid inside and is connected to the control device.

4. The plate heat exchanger cleaning system according to claim 3, characterized in that: The nozzle is a rotatable nozzle.

5. The plate heat exchanger cleaning system according to claim 3, characterized in that: An electric control valve is arranged between the cleaning liquid pump and the nozzle, and the electric control valve is connected to the control device.

6. The plate heat exchanger cleaning system according to claim 3, characterized in that: The high-pressure cleaning device also includes an air compressor, a gas outlet of the air compressor is connected to a nozzle, and the air compressor is connected to a control device.

7. The plate heat exchanger cleaning system according to claim 6, characterized in that: A gas control valve is arranged between the gas outlet of the air compressor and the nozzle, and the gas control valve is connected to the control device.

8. The plate heat exchanger cleaning system according to claim 3, characterized in that: It also includes a circulating filtration device, which includes a waste liquid collection tank arranged below the plate channel of the plate heat exchanger. The output end of the waste liquid collection tank is connected to a filtration structure for filtering out particles and dirt in the waste liquid; the output end of the filtration structure is connected to a cleaning liquid storage tank.

9. A method for cleaning a plate heat exchanger using the cleaning system according to any one of claims 1 to 8, characterized in that: include: Obtain the fluid data at the inlet and outlet of the plate heat exchanger; According to the fluid data at the inlet and outlet of the plate heat exchanger, determine whether dirt accumulation occurs; If dirt accumulation occurs, the plate heat exchanger should be cleaned according to the inlet and outlet fluid data.

10. A plate heat exchanger, characterized in that: A plate heat exchanger cleaning system comprising the plate heat exchanger cleaning system according to any one of claims 1 to 8.

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