Intelligent closed tower cooling spraying and cleaning reuse system and control method

Abstract

The invention provides an intelligent closed tower cooling, spraying and cleaning multiplexing system and a control method. The intelligent closed tower cooling, spraying and cleaning multiplexing system comprises a heat exchange group and a control device, wherein the heat exchange group is connected with a water source through a high-pressure pump; the heat exchange set comprises a plurality of movable spraying devices connected in parallel, a plurality of electromagnetic valves connected between the high-pressure pump and the movable spraying devices in series and a heat exchanger arranged below the movable spraying devices. By adopting the structure, when the closed tower is used for cooling, spraying and cleaning, the control device controls the high-pressure pump to input the water source into the heat exchange group and controls the opening and closing of the electromagnetic valve and the start and stop of the movable spraying device under the arrangement of the high-pressure pump, the water source and the heat exchange group, so that the water pressure input into the heat exchange group is high, and the heat exchange group can be recycled. The closed tower is provided with multiple heat exchangers, and the multiple heat exchangers can be cooled, sprayed and cleaned in sequence at the same time, so that the closed tower has the cooling, spraying and cleaning functions, the cleaning efficiency of the closed tower is improved, and manual cleaning is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of closed tower spray cooling and cleaning multiplexing systems, and in particular to an intelligent closed tower cooling spray and cleaning multiplexing system and a control method. Background Art

[0002] The cooling method of a closed cooling tower is generally to set a spray device above the heat exchanger. After water is passed into the spray device, the water is sprayed onto the heat exchanger through the spray device, thereby cooling the heat exchanger.

[0003] The following problems were found in the process of using closed cooling tower: 1. The spray device does not always work during operation in a closed cooling tower; when the ambient temperature is low, the spray device will stop working, and dust will be adsorbed on the cooler surface during the stoppage period. When the ambient temperature is high, the spray device will restart. However, since the spray device sprays low-pressure water, it is difficult to remove the dust accumulated on the surface, which in turn affects the heat exchange efficiency of the heat exchanger.

[0004] 2. Closed cooling towers are often used in cement plants, coal coking enterprises and other enterprises with large amounts of air dust. When air dust is adsorbed on the surface of the heat exchanger, it will seriously reduce the heat exchange efficiency of the heat exchanger. To address this problem, manual cleaning was originally used, but this method has low work efficiency and a poor working environment. People walking and stepping on the surface of the heat exchange equipment can easily damage it, reducing the service life of the equipment.

[0005] 3. The spraying devices of existing closed cooling towers all use low-pressure water for spraying. In the long run, the surface of the heat exchanger will be scaled and moss will grow, which will affect the heat exchange efficiency of the heat exchanger. These scales and mosses also need to be treated in the same way as in problem 2. Summary of the invention

[0006] The invention discloses an intelligent closed tower cooling spray and cleaning multiplexing system and a control method, which mainly solves the problem that the cleaning of the heat exchanger surface of a traditional closed cooling tower is usually done manually, and the spraying device uses low-pressure water spraying, which easily causes dirt and moss to form on the heat exchanger surface.

[0007] To achieve the above object, the technical solution of the present invention is implemented as follows: In a first aspect, the present invention provides an intelligent closed tower cooling spraying and cleaning multiplexing system, comprising a heat exchange group 3 and a control device 4 connected to a water source 2 via a high-pressure pump 1; The heat exchange group 3 includes a plurality of mobile spray devices 31 connected in parallel, a plurality of solenoid valves 32 connected in series between the high-pressure pump 1 and the mobile spray devices 31, and a heat exchanger 33 arranged below the mobile spray devices 31; The control device 4 includes a cooling spray and cleaning multiplexing control unit, which is used to control the start and stop of the high-pressure pump 1, and to control the individual or simultaneous opening and closing of multiple solenoid valves 32 and the start and stop of the mobile spray device 31 connected in series therewith.

[0008] In one embodiment, the mobile spray device 31 includes a mobile mechanism 311, a spray head 312 and a drive motor 313, the spray head 312 is arranged on the mobile mechanism 311, the spray head 312 is connected to the solenoid valve 32, and the output end of the drive motor 313 is transmission-connected to the mobile mechanism 311.

[0009] In one embodiment, the mobile spray device 31 further includes two limit switches 314 , which are respectively disposed at two ends of a travel of the mobile mechanism 311 , and the two ends of the travel correspond to two ends of the heat exchanger 33 .

[0010] In one embodiment, a pressure sensor 5 and a safety pressure relief electric valve 6 are connected between the high-pressure pump 1 and the heat exchange group 3 .

[0011] In one embodiment, the control device 4 further includes a safety pressure relief control unit, and the safety pressure relief control unit is used to control the opening and closing of the safety pressure relief electric valve 6 .

[0012] In one embodiment, the heat exchanger 33 is provided with a medium inlet and a medium outlet, and the medium outlet of the heat exchanger 33 is provided with a temperature sensor 331 .

[0013] The advantages or beneficial effects of the above technical solution include at least: when the closed tower is subjected to cooling, spraying and cleaning reuse, through the setting of the high-pressure pump 1, the water source 2 and the heat exchange group 3, the control device 4 controls the high-pressure pump 1 to input the water source 2 into the heat exchange group 3, and controls the opening and closing of the solenoid valve 32 and the start and stop of the mobile spraying device 31, so that the water pressure input to the heat exchange group 3 can be high pressure, and the cooling, spraying and sequential cleaning of multiple heat exchangers 33 can be achieved simultaneously, thereby ensuring that it has the functions of cooling, spraying and cleaning. During cleaning, the cleaning efficiency of the closed tower can be improved, and manual cleaning can be avoided to prevent damage during cleaning.

[0014] In a second aspect, the present invention provides a control method for an intelligent closed tower cooling spray and cleaning multiplexing system, including a cooling and cleaning multiplexing control method, a cleaning control method, a movement control method and a safety auxiliary control method for controlling the above-mentioned intelligent closed tower cooling spray and cleaning multiplexing system; The cooling and cleaning multiplexing control method comprises: when the temperature sensor 331 at the medium outlet of a single or multiple heat exchangers 33 senses that the medium temperature is higher than the cooling set value, the control device 4 controls the mobile spray device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series therewith to open, and controls the high-pressure pump 1 to start, and performs cooling spraying on the corresponding heat exchanger 33; otherwise, the mobile spray device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series therewith are controlled to close, and until the last electromagnetic valve 32 is closed, the high-pressure pump 1 is controlled to stop working, and then the last electromagnetic valve 32 is controlled to close; The cleaning control method comprises: when the temperature sensor 331 at the medium outlet of a single heat exchanger 33 senses that the medium temperature is higher than the cleaning set value, the control device 4 controls the mobile spray device 31 above the corresponding heat exchanger 33 to start and the electromagnetic valve 32 connected in series therewith to open, and controls the high-pressure pump 1 to start, and sprays and cleans the corresponding heat exchanger 33; otherwise, the high-pressure pump 1 is first controlled to be closed, and then the mobile spray device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series therewith are controlled to be closed; when the medium outlet of multiple heat exchangers 33 is When the temperature sensor 331 at the outlet of the medium senses that the medium temperature is higher than the cleaning set value at the same time, the control device 4 controls the mobile spray device 31 above one of the corresponding heat exchangers 33 to start and the electromagnetic valve 32 connected in series therewith to open, and controls the high-pressure pump 1 to start, and sprays and cleans the corresponding heat exchanger 33. Otherwise, the high-pressure pump 1 is first controlled to be closed, and then the mobile spray device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series therewith are controlled to be closed, and then the other heat exchangers 33 are gradually cleaned in the same way; The movement control method includes: when the control device 4 controls the mobile spray device 31 to start, the control device 4 controls the driving motor 313 of the mobile spray device 31 to drive the moving mechanism 311 to drive the spray head 312 to move, and when the moving mechanism 311 touches the limit to open and close, the control device 4 controls the driving motor 313 to reversely drive the moving mechanism 311 to make the moving mechanism 311 reciprocate, and controls the moving speed and the number of reciprocating movements of the moving mechanism 311; The safety auxiliary control method includes: when the pressure sensed by the pressure sensor 5 is higher than the preset safety value, the control device 4 controls the safety pressure relief electric valve 6 to open, controls the high pressure pump 1 to close, and triggers the valve failure alarm; otherwise, the safety pressure relief electric valve 6 is controlled to close. In one embodiment, the cleaning control method takes precedence over the temperature drop cleaning multiplexing control method.

[0015] In one embodiment, the cleaning setting value is higher than the cooling setting value.

[0016] In one embodiment, in the cleaning control method, when a heat exchanger 33 stops working, the control device 4 skips the cleaning work of the corresponding heat exchanger 33 .

[0017] The advantages or beneficial effects of the above technical solution include at least: through the cooperation of the above-mentioned cooling and cleaning multiplexing control method, the cleaning control method, the movement control method and the safety auxiliary control method, the opening and closing of the mobile spray device 31 and the solenoid valve 32 connected in series can be controlled, so that the heat exchanger 33 that needs to be cleaned can be sprayed and cleaned in turn by high-pressure spraying, and the heat exchanger 33 that needs to be cooled can be sprayed and cooled at the same time, so that the mobile spray device 31 can cool down and spray the heat exchanger 33 while also spraying and cleaning, and ensure that the water pressure during cleaning is sufficient to clean the surface of the heat exchanger 33. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0019] Figure 1 A schematic structural diagram of an intelligent closed tower cooling, spraying and cleaning multiplexing system according to an exemplary embodiment of the present invention is shown; Figure 2 A schematic structural diagram of a mobile spraying device according to an exemplary embodiment of the present invention is shown; Figure 3 A schematic structural diagram of a heat exchanger according to an exemplary embodiment of the present invention is shown.

[0020] Description of reference numerals: 1. High pressure pump; 2. Water source; 3. Heat exchange group; 31. Mobile spray device; 311. Mobile mechanism; 312. Spray head; 313. Driving motor; 314. Limit switch; 32. Solenoid valve; 33. Heat exchanger; 331. Temperature sensor; 4. Control device; 5. Pressure sensor; 6. Safety pressure relief electric valve. DETAILED DESCRIPTION

[0021] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0024] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0026] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0027] See also Figure 1 , an embodiment of the present invention provides an intelligent closed tower cooling spraying and cleaning multiplexing system, including a heat exchange group 3 and a control device 4 connected to a water source 2 via a high-pressure pump 1; The heat exchange group 3 includes a plurality of mobile spray devices 31 connected in parallel, a plurality of solenoid valves 32 connected in series between the high-pressure pump 1 and the mobile spray devices 31, and a heat exchanger 33 arranged below the mobile spray devices 31; The control device 4 includes a cooling spray and cleaning multiplexing control unit, which is used to control the start and stop of the high-pressure pump 1, and to control the individual or simultaneous opening and closing of multiple solenoid valves 32 and the start and stop of the mobile spray device 31 connected in series therewith.

[0028] By adopting the above structure, when the closed tower is subjected to cooling, spraying and cleaning reuse, through the setting of the high-pressure pump 1, the water source 2 and the heat exchange group 3, the control device 4 controls the high-pressure pump 1 to input the water source 2 into the heat exchange group 3, and controls the opening and closing of the solenoid valve 32 and the start and stop of the mobile spraying device 31, so that the water pressure input to the heat exchange group 3 can be high pressure, and the simultaneous cooling, spraying and sequential cleaning of multiple heat exchangers 33 can be achieved, thereby ensuring that it has the functions of cooling and spraying and cleaning. During cleaning, the cleaning efficiency of the closed tower can be improved, and manual cleaning can be avoided to prevent damage during cleaning.

[0029] In one embodiment, see Figure 1 , Figure 2 and Figure 3 The mobile spray device 31 includes a mobile mechanism 311, a spray head 312 and a drive motor 313. The spray head 312 is arranged on the mobile mechanism 311, the spray head 312 is connected to the electromagnetic valve 32, and the output end of the drive motor 313 is connected to the mobile mechanism 311. There can be multiple spray heads 312, which are arranged in sequence on the mobile mechanism 311. In actual use, the driving force of the drive motor 313 can drive the mobile mechanism 311 to move along the heat exchanger 33.

[0030] The mobile spray device 31 further includes two limit switches 314, which are respectively arranged at two ends of the travel of the mobile mechanism 311, and the two ends of the travel correspond to two ends of the heat exchanger 33. In actual use, the two limit switches 314 of the mobile spray device 31 can cooperate with each other to limit the travel ends of the mobile mechanism 311, so as to control the mobile mechanism 311 to achieve reciprocating movement.

[0031] A pressure sensor 5 and a safety pressure relief electric valve 6 are connected between the high-pressure pump 1 and the heat exchange group 3. In actual use, the pressure sensor 5 can sense the water pressure of the water pipe between the high-pressure pump 1 and the heat exchange group 3 through the cooperation of the pressure sensor 5 and the safety pressure relief electric valve 6, and can control the opening and closing of the safety pressure relief electric valve 6 by the control device 4 according to the sensed water pressure, so as to prevent the electromagnetic valve 32 from being damaged and not opening, and to protect the pipeline from pressure relief.

[0032] The control device 4 also includes a safety pressure relief control unit, which is used to control the opening and closing of the safety pressure relief electric valve 6. In actual use, through the setting of the safety pressure relief control unit, the opening and closing of the safety pressure relief electric valve 6 can be controlled accordingly according to the water pressure sensed by the pressure sensor 5.

[0033] The heat exchanger 33 is provided with a medium inlet and a medium outlet, and the medium outlet of the heat exchanger 33 is provided with a temperature sensor 331. In actual use, by providing the temperature sensor 331 at the medium outlet of the heat exchanger 33, the temperature of the medium outlet of the heat exchanger 33 can be sensed, so that the control device 4 can control the opening and closing of the corresponding solenoid valve 32 of the heat exchange group 3 and the start and stop of the mobile spray device 31 according to the sensed temperature.

[0034] See also Figure 1 , Figure 2 and Figure 3 , an embodiment of the present invention provides a control method for an intelligent closed tower cooling spray and cleaning multiplexing system, including a cooling and cleaning multiplexing control method, a cleaning control method, a movement control method and a safety auxiliary control method for controlling the above-mentioned intelligent closed tower cooling spray and cleaning multiplexing system; The cooling and cleaning multiplexing control method comprises: when the temperature sensor 331 at the medium outlet of a single or multiple heat exchangers 33 senses that the medium temperature is higher than the cooling set value, the control device 4 controls the mobile spray device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series therewith to open, and controls the high-pressure pump 1 to start, and performs cooling spraying on the corresponding heat exchanger 33; otherwise, the mobile spray device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series therewith are controlled to close, and until the last electromagnetic valve 32 is closed, the high-pressure pump 1 is controlled to stop working, and then the last electromagnetic valve 32 is controlled to close; That is, when a single temperature sensor 331 senses that the medium temperature is higher than the cooling set value, the control device 4 controls the mobile spray device 31 above the corresponding heat exchanger 33 and the solenoid valve 32 connected in series therewith to open, and controls the high-pressure pump 1 to start; otherwise, the high-pressure pump 1 is controlled to stop working, and then the mobile spray device 31 above the corresponding heat exchanger 33 and the solenoid valve 32 connected in series therewith are controlled to close; when the temperature sensors 331 at the medium outlets of multiple heat exchangers 33 simultaneously sense that the medium temperature is higher than the cooling set value, the control device 4 controls the mobile spray devices 31 above the multiple corresponding heat exchangers 33 and the solenoid valve 32 connected in series therewith to open at the same time, and controls the high-pressure pump 1 to start; otherwise, the mobile spray device 31 above the corresponding heat exchanger 33 and the solenoid valve 32 connected in series therewith are controlled to close, and until the last solenoid valve 32 is closed, the high-pressure pump 1 is controlled to stop working, and then the last solenoid valve 32 is controlled to close.

[0035] The cleaning control method comprises: when the temperature sensor 331 at the medium outlet of a single heat exchanger 33 senses that the medium temperature is higher than the cleaning set value, the control device 4 controls the mobile spray device 31 above the corresponding heat exchanger 33 to start and the electromagnetic valve 32 connected in series therewith to open, and controls the high-pressure pump 1 to start, and sprays and cleans the corresponding heat exchanger 33; otherwise, the high-pressure pump 1 is first controlled to be closed, and then the mobile spray device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series therewith are controlled to be closed; when the medium outlet of multiple heat exchangers 33 is When the temperature sensor 331 at the outlet of the medium senses that the medium temperature is higher than the cleaning set value at the same time, the control device 4 controls the mobile spray device 31 above one of the corresponding heat exchangers 33 to start and the electromagnetic valve 32 connected in series therewith to open, and controls the high-pressure pump 1 to start, and sprays and cleans the corresponding heat exchanger 33. Otherwise, the high-pressure pump 1 is first controlled to be closed, and then the mobile spray device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series therewith are controlled to be closed, and then the other heat exchangers 33 are gradually cleaned in the same way; The movement control method includes: when the control device 4 controls the mobile spray device 31 to start, the control device 4 controls the driving motor 313 of the mobile spray device 31 to drive the moving mechanism 311 to drive the spray head 312 to move, and when the moving mechanism 311 touches the limit to open and close, the control device 4 controls the driving motor 313 to reversely drive the moving mechanism 311 to make the moving mechanism 311 reciprocate, and controls the moving speed and the number of reciprocating movements of the moving mechanism 311; The safety auxiliary control method includes: when the pressure sensed by the pressure sensor 5 is higher than a preset safety value, the control device 4 controls the safety pressure relief electric valve 6 to open, controls the high-pressure pump 1 to close, and triggers a valve failure alarm; otherwise, the safety pressure relief electric valve 6 is controlled to close.

[0036] By adopting the above-mentioned structure, through the cooperation of the above-mentioned cooling and cleaning multiplexing control method, cleaning control method, movement control method and safety auxiliary control method, the opening and closing of the mobile spray device 31 and the solenoid valve 32 connected in series can be controlled, so that the heat exchanger 33 that needs to be cleaned can be cleaned by high-pressure spraying in sequence and the heat exchanger 33 that needs to be cooled can be sprayed and cooled at the same time, so that the mobile spray device 31 can cool down and spray the heat exchanger 33 while also spraying and cleaning, and ensure that the water pressure during cleaning is sufficient to clean the surface of the heat exchanger 33.

[0037] The cleaning control method takes precedence over the cooling and cleaning multiplexing control method. That is, when it is sensed that the heat exchanger 33 needs to be cleaned, the heat exchanger 33 is cleaned first, and the heat exchanger 33 is cooled down only after the last heat exchanger 33 is cleaned.

[0038] The cleaning setting value is higher than the cooling setting value. That is, when the heat exchanger 33 is cooled by the cooling and cleaning multiplexing control method, it is difficult to reduce the temperature of the medium in the heat exchanger 33, and the temperature gradually rises, indicating that the surface of the heat exchanger 33 needs to be cleaned, so that the heat exchanger 33 that needs to be cleaned can be clearly sensed.

[0039] In the cleaning control method, when a heat exchanger 33 stops working, the control device 4 skips the cleaning work of the corresponding heat exchanger 33. In actual use, when the heat exchanger 33 stops working, the cleaning work of the heat exchanger 33 is automatically skipped, which can reduce useless cleaning time and improve cleaning efficiency.

[0040] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0041] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. An intelligent closed tower cooling spraying and cleaning multiplexing system, characterized in that: It includes a heat exchange group and a control device connected to a water source through a high-pressure pump; The heat exchange group includes a plurality of mobile spray devices connected in parallel to each other, a plurality of solenoid valves connected in series between the high-pressure pump and the mobile spray devices, and a heat exchanger arranged below the mobile spray devices; The control device includes a cooling spray and cleaning multiplexing control unit, which is used to control the start and stop of the high-pressure pump, the individual or simultaneous opening and closing of multiple solenoid valves, and the start and stop of a mobile spray device connected in series.

2. The intelligent closed tower cooling spraying and cleaning multiplexing system according to claim 1, characterized in that: The mobile spraying device comprises a mobile mechanism, a spray head and a driving motor. The spray head is arranged on the mobile mechanism, the spray head is connected to the electromagnetic valve, and the output end of the driving motor is drivingly connected to the mobile mechanism.

3. The intelligent closed tower cooling spraying and cleaning multiplexing system according to claim 1, characterized in that: The mobile spray device further comprises two limit switches, which are respectively arranged at two ends of the travel of the mobile mechanism, and the two ends of the travel correspond to two ends of the heat exchanger respectively.

4. The intelligent closed tower cooling spraying and cleaning multiplexing system according to claim 1, characterized in that: A pressure sensor and a safety pressure relief electric valve are connected between the high-pressure pump and the heat exchange group.

5. The intelligent closed tower cooling spraying and cleaning multiplexing system according to claim 4, characterized in that: The control device further comprises a safety pressure relief control unit, which is used to control the opening and closing of the safety pressure relief electric valve.

6. The intelligent closed tower cooling spraying and cleaning multiplexing system according to claim 1, characterized in that: The heat exchanger is provided with a medium inlet and a medium outlet, and the medium outlet of the heat exchanger is provided with a temperature sensor.

7. A control method for an intelligent closed tower cooling spray and cleaning multiplexing system, characterized in that: It includes a cooling and cleaning multiplexing control method, a cleaning control method, a movement control method and a safety auxiliary control method for controlling the intelligent closed tower cooling spraying and cleaning multiplexing system described in any one of claims; The cooling and cleaning multiplexing control method comprises: when the temperature sensor at the medium outlet of a single or multiple heat exchangers senses that the medium temperature is higher than the cooling set value, the control device controls the mobile spray device above the corresponding heat exchanger and the electromagnetic valve connected in series therewith to open, and controls the high-pressure pump to start, and performs cooling spraying on the corresponding heat exchanger; otherwise, the mobile spray device above the corresponding heat exchanger and the electromagnetic valve connected in series therewith are controlled to close, and until the last electromagnetic valve is closed, the high-pressure pump is controlled to stop working, and then the last electromagnetic valve is controlled to close; The cleaning control method comprises: when the temperature sensor at the medium outlet of a single heat exchanger senses that the medium temperature is higher than the cleaning set value, the control device controls the mobile spray device above the corresponding heat exchanger to start and the electromagnetic valve connected in series therewith to open, and controls the high-pressure pump to start, and sprays and cleans the corresponding heat exchanger; otherwise, the high-pressure pump is first controlled to be closed, and then the mobile spray device above the corresponding heat exchanger and the electromagnetic valve connected in series therewith are controlled to be closed; when the temperature sensors at the medium outlets of multiple heat exchangers simultaneously sense that the medium temperature is higher than the cleaning set value, the control device controls the mobile spray device above one of the corresponding heat exchangers to start and the electromagnetic valve connected in series therewith to open, and controls the high-pressure pump to start, and sprays and cleans the corresponding heat exchanger; otherwise, the high-pressure pump is first controlled to be closed, and then the mobile spray device above the corresponding heat exchanger and the electromagnetic valve connected in series therewith are controlled to be closed, and then other heat exchangers are gradually cleaned in the same manner; The movement control method comprises: when the control device controls the mobile spray device to start, the control device controls the driving motor of the mobile spray device to drive the mobile mechanism to drive the spray head to move, when the mobile mechanism touches the limit to open and close, the control device controls the driving motor to reversely drive the mobile mechanism to make the mobile mechanism reciprocate, and controls the moving speed and the number of reciprocating movements of the mobile mechanism; The safety auxiliary control method includes: when the pressure sensed by the pressure sensor is higher than a preset safety value, the control device controls the safety pressure relief electric valve to open, controls the high-pressure pump to close, and triggers a valve failure alarm; otherwise, the safety pressure relief electric valve is controlled to close.

8. The control method of the intelligent closed tower cooling spraying and cleaning multiplexing system as described in claim 7, wherein the cleaning control method takes precedence over the cooling and cleaning multiplexing control method.

9. The control method of the intelligent closed tower cooling spraying and cleaning multiplexing system as described in claim 7, wherein the cleaning set value is higher than the cooling set value.

10. The control method of the intelligent closed tower cooling spray and cleaning reuse system as described in claim 7, wherein in the cleaning control method, when a heat exchanger stops working, the control device skips the cleaning work of the corresponding heat exchanger.

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