Cleaning system and cleaning control method of cleaning system

Abstract

The invention discloses a cleaning system and a cleaning control method of the cleaning system, and relates to the technical field of chemical engineering, the cleaning system comprises a flash evaporation crystallizer, a steam heat supply device, a heat exchanger and a flushing device; a heat supply flow path is formed in the steam heat supply device and is used for generating steam; a first heat exchange runner section and a second heat exchange runner section which can exchange heat with each other are formed on the heat exchanger; the flushing device is provided with a flushing pipeline, the flushing pipeline is located on the heat supply flow path and communicated with the first heat exchange flow path section, condensate water circulates in the flushing pipeline, and the tail end of the flushing pipeline extends into the flash evaporation crystallizer and is connected with a flushing spray head facing the interior of the flash evaporation crystallizer. The high-temperature condensate water of the heat exchanger is fed into the flash evaporation crystallizer through the flushing pipeline to be used for cleaning the cobalt sulfate scales, the cleaning effect of the cobalt sulfate scales in the flash evaporation crystallizer can be improved, and the safety risk can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical engineering, in particular to a cleaning system and a cleaning control method of the cleaning system. BACKGROUND

[0002] Cobalt sulfate is an important raw material for preparing lithium battery positive electrode materials, catalysts, ceramic glaze, etc. In its production process, a flash crystallizer is often used to crystallize cobalt sulfate crystals from concentrated solution. The equipment makes the solution boil by instant pressure reduction, water evaporates quickly and cools the solution, thereby precipitating crystals. However, cobalt sulfate solution is prone to form hard scale on the inner surface of the crystallizer, especially on the flash chamber wall, baffle, circulating cylinder, sight glass, etc. during the flash process. The main component of these scales is cobalt sulfate, and the structure layer will cause problems such as efficiency reduction, capacity reduction and product purity reduction, which requires frequent shutdown for maintenance and cleaning using mechanical or chemical methods, not only causing material waste and cost increase, but also bringing high safety risk to operators. SUMMARY

[0003] The main purpose of the present application is to provide a cleaning system and a cleaning control method of the cleaning system, aiming to improve the cleaning effect of cobalt sulfate scale in the flash crystallizer and reduce the safety risk.

[0004] To achieve the above-mentioned purpose, the cleaning system provided by the present application comprises a flash crystallizer, a steam heating device, a heat exchanger and a flushing device. The steam heating device forms a heating flow path to generate steam. The heat exchanger forms first and second heat exchange flow path sections capable of heat exchange with each other. The first heat exchange flow path section is on the heating flow path, and the second heat exchange flow path section flows through materials. The end of the second heat exchange flow path section communicates with the flash crystallizer to input materials into the flash crystallizer. The flushing device has a flushing pipeline. The flushing pipeline is on the heating flow path and communicates with the first heat exchange flow path section. The flushing pipeline flows through condensed water. The end of the flushing pipeline extends into the flash crystallizer and is connected with a flushing nozzle towards the inside of the flash crystallizer.

[0005] In an embodiment, a recovery tank is provided on the heating flow path. The recovery tank is between the heat exchanger and the flushing nozzle.

[0006] In an embodiment, the cleaning system further comprises a solution recovery pipeline and a solution concentration detection meter. The solution recovery pipeline communicates with a blowdown port of the flash crystallizer to discharge cleaning waste liquid in the flash crystallizer. The solution concentration detection meter is installed on the solution recovery pipeline to detect the concentration of the cleaning waste liquid in the solution recovery pipeline.

[0007] In an embodiment, the solution recovery pipeline is provided with a blowdown valve, the blowdown valve is electrically connected with the solution concentration detector, and the blowdown valve is used to control the flow of the cleaning waste liquid in the solution recovery pipeline to a waste water treatment station; and / or, the solution recovery pipeline is provided with a transfer pump, the transfer pump is electrically connected with the solution concentration detector, and the transfer pump is used to control the flow of the solution in the solution recovery pipeline to a raw material tank, the raw material tank is in communication with the second heat exchange channel section of the heat exchanger, and the raw material tank is used to recover the cleaning waste liquid in the solution recovery pipeline.

[0008] In an embodiment, the flushing device further comprises a high-pressure flushing pump, the high-pressure flushing pump is installed on the flushing pipeline, and the high-pressure flushing pump is used to adjust the water pressure of the condensed water in the flushing pipeline.

[0009] In an embodiment, a plurality of flushing nozzles are provided, and the plurality of flushing nozzles are provided as rotatable nozzles.

[0010] In an embodiment, the flushing nozzles are at least partially provided with spherical nozzles; and / or, the flushing nozzles are at least partially provided with high-pressure fan-shaped nozzles.

[0011] In an embodiment, the flushing pipeline is provided with a temperature maintaining device, the temperature maintaining device is used to maintain the temperature of the condensed water in the flushing pipeline.

[0012] In an embodiment, the cleaning system further comprises a differential pressure sensor, the differential pressure sensor is installed in the flash crystallizer, and is used to monitor the fouling thickness in the flash crystallizer.

[0013] A cleaning control method of a cleaning system, the cleaning system comprises a flash crystallizer, a steam heating device, a heat exchanger, and a flushing device; the steam heating device is formed with a heating flow path to generate steam; the heat exchanger is formed with a first heat exchange channel section and a second heat exchange channel section capable of heat exchange with each other, the first heat exchange channel section is on the heating flow path, the second heat exchange channel section is in communication with a material, and an end of the second heat exchange channel section is in communication with the flash crystallizer to input the material into the flash crystallizer; the flushing device has a flushing pipeline, the flushing pipeline is on the heating flow path and in communication with the first heat exchange channel section, condensed water flows through the flushing pipeline, and an end of the flushing pipeline extends into the flash crystallizer and is connected with a flushing nozzle towards the inside of the flash crystallizer; the cleaning control of the cleaning system comprises the following steps: controlling the flushing device to start and spray condensed water towards the fouling in the flash crystallizer; obtaining a solution concentration signal of the solution concentration detector; When the concentration signal meets the reuse conditions, the transfer pump is controlled to operate to transport the cleaning waste liquid in the solution recovery pipeline to the raw material tank. When the concentration signal meets the discharge conditions, the drain valve is opened to transport the flushed solution in the solution recovery pipeline to the wastewater treatment station.

[0014] The technical solution of this invention includes a steam heating device that provides steam as a heat source. The steam is then fed into the first heat exchange channel section of the heat exchanger through a heating flow path, allowing the material flowing in the second heat exchange channel section to exchange heat with the steam, thereby heating the material and turning the steam into high-temperature condensate. The condensate from the first heat exchange channel section can then be discharged into a flushing pipe. The end of the flushing pipe extends into the flash crystallizer and is connected to a flushing nozzle, allowing the high-temperature condensate in the flushing pipe to be sprayed out through the flushing nozzle to flush the inner wall of the flash crystallizer. The temperature and water flow impact force are used to dissolve and peel off the cobalt sulfate scale.

[0015] In summary, the technical solution of the present invention improves the cleaning effect of cobalt sulfate scale in the flash crystallizer and reduces safety risks by sending the high-temperature condensate from the heat exchanger into the flash crystallizer through a flushing pipeline. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment of the cleaning system provided by the present invention; Figure 2 For having Figure 1 Schematic diagram of a flash crystallizer; Figure 3 For having Figure 2 Schematic diagram of the middle flush nozzle; Figure 4 A flowchart illustrating an embodiment of the cleaning control method for the cleaning system provided by the present invention; Figure 5 This is a schematic diagram of the control terminal of the cleaning control method for the cleaning system of the hardware operating environment involved in the embodiments of the present invention.

[0018] Explanation of icon numbers: 1. Flash crystallizer; 2. Steam heating device; 3. Heat exchanger; 4. Flushing device; 41. Flushing pipeline; 42. Flushing nozzle; 421. Spherical nozzle; 5. Recovery tank; 6. Solution recovery pipeline; 7. Wastewater treatment station; 8. Raw material tank; 1001. Processor; 1002. Communication bus; 1003. User interface; 1004. Network interface; 1005. Memory.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] Cobalt sulfate is an important raw material for the preparation of lithium battery cathode materials, catalysts, and ceramic glazes. In its production process, a flash crystallizer is commonly used to crystallize cobalt sulfate crystals from a concentrated solution. This equipment boils the solution by instantaneously reducing pressure, rapidly evaporating water and cooling the solution, thereby precipitating crystals. However, during the flash evaporation process, the cobalt sulfate solution readily forms hard scale on the internal surfaces of the crystallizer, especially on the walls, guide plates, circulation cylinder, and sight glasses. This scale, primarily composed of cobalt sulfate, can lead to reduced efficiency, lower production capacity, and decreased product purity. Frequent shutdowns for maintenance and mechanical or chemical cleaning are required, resulting in material waste, increased costs, and significant safety risks for operators.

[0024] Therefore, the present invention proposes a cleaning system.

[0025] Please see the appendix Figure 1 and attached Figure 2 In one embodiment of the present invention, the cleaning system includes a flash crystallizer 1, a steam heating device 2, a heat exchanger 3, and a rinsing device 4; the steam heating device 2 forms a heating flow path for generating steam; the heat exchanger 3 forms a first heat exchange flow channel section and a second heat exchange flow channel section capable of exchanging heat with each other, the first heat exchange flow channel section is located on the heating flow path, the second heat exchange flow channel section carries material, and the end of the second heat exchange flow channel section is connected to the flash crystallizer 1 for inputting material into the flash crystallizer 1; the rinsing device 4 has a rinsing pipe 41, the rinsing pipe 41 is located on the heating flow path and is connected to the first heat exchange flow channel section, the rinsing pipe 41 carries condensate, the end of the rinsing pipe 41 extends into the flash crystallizer 1, and is connected to a rinsing nozzle 42 facing the interior of the flash crystallizer 1.

[0026] In this embodiment of the invention, a steam heating device 2 is provided to supply steam as a heat source. The steam is then fed into the first heat exchange channel section of the heat exchanger 3 through a heating flow path, allowing the material flowing in the second heat exchange channel section to exchange heat with the steam, thereby heating the material and turning the steam into high-temperature condensate. The condensate from the first heat exchange channel section can then be discharged into a flushing pipe 41. The end of the flushing pipe 41 extends into the flash crystallizer 1 and is connected to a flushing nozzle 42, allowing the high-temperature condensate in the flushing pipe 41 to be sprayed out through the flushing nozzle 42 to flush the inner wall of the flash crystallizer 1. The temperature and water flow impact force are used to dissolve and peel off the cobalt sulfate scale. This embodiment improves the cleaning effect of cobalt sulfate scale in the flash crystallizer 1 and reduces safety risks by sending the high-temperature condensate from the heat exchanger 3 into the flash crystallizer 1 through the flushing pipe 41 for cleaning cobalt sulfate scale.

[0027] It should be noted that the high-temperature condensate discharged from heat exchanger 3 is between 80°C and 95°C. The flushing device 4 can use the high temperature of the condensate to accelerate the dissolution of cobalt sulfate scale. The material flowing in the second heat exchange channel section of heat exchanger 3 is set as cobalt sulfate feed liquid to provide raw materials for flash crystallizer 1.

[0028] Understandably, the scale is a solid substance mainly composed of cobalt sulfate, which adheres to the inside of the flash crystallizer.

[0029] In one embodiment, a recovery tank 5 is provided in the heating flow path, and the recovery tank 5 is located between the heat exchanger 3 and the flushing nozzle 42.

[0030] In embodiments of the present invention, by setting up a recovery tank 5, the condensate generated during material heat exchange in the heat exchanger 3 can be collected, and then when cleaning is required, the condensate in the recovery tank 5 can be discharged for rinsing when material heat exchange and flash crystallizer 1 feeding are stopped.

[0031] It is understood that the recycling tank 5 can be configured as a tank with heat preservation function to reduce the heat loss of condensate. For example, it can be configured as a tank with vacuum jacket or coated with heat preservation coating, or it can be configured as other tanks with heat preservation function. This invention does not limit the scope of the invention.

[0032] In one embodiment, the cleaning system further includes a solution recovery pipeline 6 and a solution concentration meter. The solution recovery pipeline 6 is connected to the drain port of the flash crystallizer 1 to discharge the cleaning waste liquid in the flash crystallizer 1. The solution concentration meter is installed in the solution recovery pipeline 6 to detect the concentration of the cleaning waste liquid in the solution recovery pipeline 6.

[0033] In this embodiment of the invention, by setting up a solution recovery pipeline 6, the cleaning waste liquid generated after being cleaned with condensate water in the flash crystallizer 1 can be transported; at the same time, this embodiment also sets up a solution concentration detector, which can detect the concentration of the cleaning waste liquid in the solution recovery pipeline 6, and then determine whether it needs to be recycled.

[0034] It is understandable that the cleaning waste liquid is a mixture of high-temperature condensate and the dissolved cobalt sulfate scale inside the flash crystallizer 1.

[0035] In one embodiment, a drain valve is installed on the solution recovery pipeline 6, which is electrically connected to a solution concentration meter. The drain valve is used to control the flow of cleaning waste liquid in the solution recovery pipeline 6 to the wastewater treatment station 7; and / or, a transfer pump is installed on the solution recovery pipeline 6, which is electrically connected to a solution concentration meter. The transfer pump is used to control the flow of solution in the solution recovery pipeline 6 to the raw material tank 8, which is connected to the second heat exchange flow channel section of the heat exchanger 3. The raw material tank 8 is used to recover the cleaning waste liquid in the solution recovery pipeline 6.

[0036] In this embodiment of the invention, by setting a drain valve, when the concentration detected by the solution concentration meter does not meet the recovery requirements, the cleaning waste liquid can be discharged into the wastewater treatment station 7 using the drain valve; this embodiment also includes a transfer pump, which is started when the concentration detected by the solution concentration meter meets the recovery requirements to send the cleaning waste liquid into the raw material tank 8. The raw material tank 8 is connected to the second heat exchange flow channel section of the heat exchanger 3, so that the recovered solution can be sent into the heat exchanger 3 for heat exchange and then transported as raw material to the flash crystallizer 1.

[0037] It should be noted that the above-mentioned related technical features, such as "a drain valve is installed on the solution recovery pipeline 6, which is electrically connected to the solution concentration meter, and the drain valve is used to control the flow of cleaning waste liquid in the solution recovery pipeline 6 to the wastewater treatment station 7" and "a transfer pump is installed on the solution recovery pipeline 6, which is electrically connected to the solution concentration meter, and the transfer pump is used to control the flow of solution in the solution recovery pipeline 6 to the raw material tank 8, which is connected to the second heat exchange flow channel section of the heat exchanger 3, and the raw material tank 8 is used to recover the cleaning waste liquid in the solution recovery pipeline 6", can be selected or installed simultaneously, and the present invention does not limit this.

[0038] In one embodiment, the flushing device 4 further includes a high-pressure flushing pump, which is installed in the flushing pipeline 41 and is used to adjust the water pressure of the condensate in the flushing pipeline 41.

[0039] In embodiments of the present invention, by setting a high-pressure flushing pump, the water pressure of the condensate in the flushing pipe 41 can be increased, thereby increasing the impact force of the condensate during flushing and improving the flushing and peeling effect on the structure.

[0040] In one embodiment, a plurality of rinsing nozzles 42 are provided, and the plurality of rinsing nozzles 42 are configured as rotatable nozzles.

[0041] In embodiments of the present invention, by providing multiple flushing nozzles 42, the flushing nozzles 42 can be respectively positioned toward multiple easily scaled areas within the flash crystallizer 1. For example, in this embodiment, the flushing nozzles 42 can be positioned toward multiple locations such as the flash chamber wall, guide plate, circulation cylinder, and sight glass, etc. The present invention does not limit this. At the same time, in this embodiment, the flushing nozzles 42 are rotatable nozzles, which can adjust the orientation and thus adjust the flushing area, thereby increasing the flushing range.

[0042] It is understood that the flushing pipe 41 in this embodiment may also be provided with multiple branch pipes, which can be connected to multiple flushing nozzles 42 respectively to perform flushing operations.

[0043] In one embodiment, the flushing nozzle 42 is at least partially equipped with a spherical nozzle 421; and / or, the flushing nozzle 42 is at least partially equipped with a high-pressure fan-shaped nozzle.

[0044] See appendix Figure 3 In the embodiments of the present invention, by setting a spherical nozzle 421 or a high-pressure fan-shaped nozzle, it is easier to rotate and adjust, and the condensate pumped by the high-pressure flushing pump can be used for flushing. Specifically, this embodiment takes the spherical nozzle 421 as an example. In this embodiment, multiple flushing nozzles 42 are provided, and spherical nozzles 421 are installed on the multiple flushing nozzles 42 for flushing. Each flushing nozzle 42 contains eight spherical nozzles 421.

[0045] It should be noted that the above-mentioned related technical features, such as "the rinsing nozzle 42 is at least partially equipped with a spherical nozzle 421" and "the rinsing nozzle 42 is at least partially equipped with a high-pressure fan-shaped nozzle", can be selected or simultaneously provided, and the present invention does not limit this.

[0046] In one embodiment, a temperature maintaining device is installed on the flushing pipe 41 to maintain the temperature of the condensate in the flushing pipe 41.

[0047] In embodiments of the present invention, by providing a temperature maintaining device on the flushing pipe 41, the temperature loss of condensate can be reduced.

[0048] It is understood that the temperature maintaining device in this embodiment can be configured as a heat tracing pipe or other structure or device that can maintain temperature. Specifically, under the action of the temperature maintaining device, the temperature of the condensate sprayed from the flushing nozzle 42 should be controlled above 70°C to ensure the dissolution efficiency of the scale.

[0049] In one embodiment, the cleaning system further includes a differential pressure sensor installed inside the flash crystallizer 1 to monitor the thickness of scale inside the flash crystallizer 1.

[0050] In embodiments of the present invention, cleaning can be performed periodically during short production stops or intervals according to the production cycle; alternatively, a differential pressure sensor can be installed to monitor the scale thickness and cleaning can be performed based on the scale thickness signal.

[0051] See appendix Figure 4 This invention provides a cleaning control method for a cleaning system. The cleaning system's specific structure is described in the above embodiments. Since this cleaning control method employs all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The cleaning control of the cleaning system includes the following steps: Start the flushing device and spray condensate towards the scale buildup inside the flash crystallizer; It is understandable that the flushing device can be activated periodically during short production stops or intervals based on the production cycle; alternatively, a differential pressure sensor can be installed to monitor the scale thickness and activate the flushing device based on the scale thickness signal. It should be understood that before starting the flushing device, the feed to the flash crystallizer should be suspended, and the system should be kept at a low temperature and low pressure to avoid affecting the flushing effect.

[0052] It should be noted that the sprayed condensate can be controlled at at least 70 degrees Celsius using a temperature maintenance device to ensure effective dissolution of scale. Acquire the solution concentration signal from the solution concentration detector; It should be noted that the solution concentration signal detected by this solution concentration detector is the concentration signal of cobalt sulfate in the cleaning waste liquid; When the concentration signal meets the reuse conditions, the transfer pump is controlled to operate to transport the cleaning waste liquid in the solution recovery pipeline to the raw material tank. It is understood that, in this embodiment, the reuse condition is that the concentration of cobalt sulfate in the concentration signal is higher than 1.32 g / L.

[0053] When the concentration signal meets the discharge conditions, the drain valve is opened to transport the flushed solution in the solution recovery pipeline to the wastewater treatment station.

[0054] It is understood that, in this embodiment, the emission condition is that the concentration of cobalt sulfate in the concentration signal is less than 1.32 g / L.

[0055] It should be understood that after the flushing solution is discharged or recycled, the flushing system can be shut down and the equipment inspected to quickly resume production.

[0056] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, PLC control cabinet, etc.; or a control terminal for a cleaning control method of a cleaning system capable of realizing the above functions, specifically, such as... Figure 5As shown, the cleaning control method control terminal of this cleaning system may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to realize communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0057] Those skilled in the art will understand that Figure 5 The structure shown does not constitute a limitation on the control terminal of the cleaning system and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0058] like Figure 5 As shown, the memory 1005, as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and a cleaning control program based on the cleaning system. Figure 5 In the control terminal of the cleaning control method of the cleaning system shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the control terminal of the cleaning control method of the cleaning system of the present invention can be set in the control terminal of the cleaning system. The control terminal of the cleaning system calls the cleaning control program based on the cleaning system stored in the memory 1005 through the processor 1001 and executes the cleaning control method of the cleaning system of the present invention.

[0059] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A cleaning system, characterized in that, include: Flash crystallizer; A steam heating device having a heating flow path for generating steam; The heat exchanger has a first heat exchange flow channel section and a second heat exchange flow channel section that can exchange heat with each other. The first heat exchange flow channel section is located in the heating flow path, and the second heat exchange flow channel section is through which material flows. The end of the second heat exchange flow channel section is connected to the flash crystallizer to input material into the flash crystallizer. as well as, A flushing device has a flushing pipeline located on the heating flow path and connected to the first heat exchange flow path section. Condensate flows through the flushing pipeline, and the end of the flushing pipeline extends into the flash crystallizer and is connected to a flushing nozzle facing the interior of the flash crystallizer.

2. The cleaning system as described in claim 1, characterized in that, A recovery tank is provided in the heating flow path, and the recovery tank is located between the heat exchanger and the flushing nozzle.

3. The cleaning system as described in claim 1, characterized in that, The cleaning system also includes: A solution recovery pipeline, connected to the drain outlet of the flash crystallizer, is used to discharge the cleaning waste liquid inside the flash crystallizer; and, A solution concentration meter is installed in the solution recovery pipeline to detect the concentration of cleaning waste liquid in the solution recovery pipeline.

4. The cleaning system as described in claim 3, characterized in that, The solution recovery pipeline is equipped with a drain valve, which is electrically connected to the solution concentration meter. The drain valve is used to control the flow of cleaning waste liquid in the solution recovery pipeline to the wastewater treatment station; and / or, A transfer pump is installed on the solution recovery pipeline. The transfer pump is electrically connected to the solution concentration detector. The transfer pump is used to control the flow of the solution in the solution recovery pipeline to the raw material tank. The raw material tank is connected to the second heat exchange flow channel section of the heat exchanger. The raw material tank is used to recover the cleaning waste liquid in the solution recovery pipeline.

5. The cleaning system as described in claim 1, characterized in that, The flushing device also includes a high-pressure flushing pump, which is installed in the flushing pipeline and is used to adjust the water pressure of the condensate in the flushing pipeline.

6. The cleaning system as described in claim 1, characterized in that, The flushing nozzles are provided in multiple ways, and the multiple flushing nozzles are configured as rotatable nozzles.

7. The cleaning system as described in claim 6, characterized in that, The flushing nozzle is at least partially equipped with a spherical nozzle; and / or, The flushing nozzle is at least partially equipped with a high-pressure fan-shaped nozzle.

8. The cleaning system as described in claim 1, characterized in that, A temperature maintaining device is installed on the flushing pipeline to maintain the temperature of the condensate in the flushing pipeline.

9. The cleaning system as described in claim 1, characterized in that, The cleaning system also includes a differential pressure sensor installed inside the flash crystallizer to monitor the thickness of scale inside the flash crystallizer.

10. A cleaning control method for a cleaning system, used in the cleaning system of claim 4, characterized in that, The cleaning control method of the cleaning system includes the following steps: The flushing device is activated to spray condensate towards the scale buildup inside the flash crystallizer. Acquire the solution concentration signal from the solution concentration detector; When the concentration signal meets the reuse conditions, the transfer pump is controlled to operate to transport the cleaning waste liquid in the solution recovery pipeline to the raw material tank. When the concentration signal meets the discharge conditions, the drain valve is opened to transport the flushed solution in the solution recovery pipeline to the wastewater treatment station.

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