A control method of intelligent closed tower cooling, spraying and cleaning multiplex system

Abstract

The application provides a control method of an intelligent closed tower cooling, spraying and cleaning multipurpose system. The system comprises a heat exchange group connected with a water source through a high-pressure pump and a control device. The heat exchange group comprises a plurality of mobile spraying devices connected in parallel with each other, a plurality of electromagnetic valves connected in series between the high-pressure pump and the mobile spraying devices, and a heat exchanger arranged below the mobile spraying devices. When the closed tower is used for cooling, spraying and cleaning, the water source is input into the heat exchange group by the high-pressure pump under the control of the control device, and the opening and closing of the electromagnetic valves and the start and stop of the mobile spraying devices are controlled, so that the water pressure input into the heat exchange group is high, and the plurality of heat exchangers can be simultaneously cooled and sprayed and sequentially cleaned, respectively. Therefore, the closed tower has the functions of cooling, spraying and cleaning, the cleaning efficiency of the closed tower is improved, and manual cleaning is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of closed tower spray cooling and cleaning multiplex system, and particularly relates to a control method of an intelligent closed tower cooling spray and cleaning multiplex system. BACKGROUND

[0002] The cooling mode of the closed cooling tower is generally to set a spray device above the heat exchanger, and water is sprayed to the heat exchanger through the spray device after the water is introduced into the spray device, so that the heat exchanger can be cooled.

[0003] In the process of using the closed cooling tower, the following problems are found:

[0004] 1. The spray device does not always maintain a working state during the operation in the closed cooling tower; when the external environment temperature is low, the spray device will stop working, and the surface of the cooler will adsorb dust during the stop working period. When the external environment temperature is high, the spray device will be restarted. However, since the spray device sprays low-pressure water, it is difficult to remove the dust accumulated on the surface, thereby affecting the heat exchange efficiency of the heat exchanger.

[0005] 2. The closed cooling tower is often used in enterprises such as cement plants and coal coking enterprises where there is a large amount of air dust. After the air dust is adsorbed on the surface of the heat exchanger, the heat exchange efficiency of the heat exchanger will be seriously reduced. To solve this problem, manual cleaning is usually used, but this method has low working efficiency and a poor working environment, and the movement and stepping of personnel can easily damage the surface of the heat exchange equipment and reduce the service life of the equipment.

[0006] 3. The spray device of the existing closed cooling tower sprays low-pressure water. Over a long period of time, the surface of the heat exchanger will be scaled and grow moss, which will affect the heat exchange efficiency of the heat exchanger. These scales and moss also need to be treated in the same way as problem 2. SUMMARY

[0007] The present application discloses a control method of an intelligent closed tower cooling spray and cleaning multiplex system, which mainly solves the problem that the surface of the heat exchanger of the traditional closed cooling tower is usually cleaned manually, and the spray device sprays low-pressure water, which easily causes dirt and moss on the surface of the heat exchanger.

[0008] To achieve the object, the technical scheme of the present application is as follows:

[0009] In a first aspect, the present application provides an intelligent closed tower cooling spray and cleaning multiplex system, comprising a heat exchange group connected to a water source through a high-pressure pump and a control device.

[0010] The heat exchange group comprises a plurality of mobile spraying devices connected in parallel, a plurality of electromagnetic valves connected in series between the high-pressure pump and the mobile spraying devices, and a heat exchanger arranged below the mobile spraying devices.

[0011] The control device comprises a cooling spraying and cleaning multiplexing control unit for controlling the start and stop of the high-pressure pump, for controlling the opening and closing of the plurality of electromagnetic valves and the start and stop of the mobile spraying devices connected in series therewith.

[0012] In an embodiment, the mobile spraying device comprises a mobile mechanism, a spraying head arranged on the mobile mechanism, and a driving motor, wherein the spraying head is connected to the electromagnetic valve, and the output end of the driving motor is drivingly connected to the mobile mechanism.

[0013] In an embodiment, the mobile spraying device further comprises two limit switches arranged at both ends of the stroke of the mobile mechanism, wherein the both ends of the stroke correspond to both ends of the heat exchanger, respectively.

[0014] In an embodiment, a pressure sensor and a safety pressure relief electric valve are connected between the high-pressure pump and the heat exchange group.

[0015] In an embodiment, the control device further comprises a safety pressure relief control unit for controlling the opening and closing of the safety pressure relief electric valve.

[0016] In an embodiment, 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.

[0017] The above technical solution has at least the following advantages or beneficial effects: when the closed tower is used for cooling spraying and cleaning multiplexing, the water source is input into the heat exchange group by the high-pressure pump through the control device, and the opening and closing of the electromagnetic valve and the start and stop of the mobile spraying device are controlled, so that the water pressure input into the heat exchange group is high, and the simultaneous cooling spraying and sequential cleaning of a plurality of heat exchangers can be realized, thereby ensuring that the closed tower has the functions of cooling spraying and cleaning, and the cleaning efficiency of the closed tower can be improved during cleaning, manual cleaning can be avoided, and damage during cleaning can be prevented.

[0018] In a second aspect, the present application provides a control method of an intelligent closed tower cooling spraying and cleaning multiplexing system, comprising a cooling and cleaning multiplexing control method, a cleaning control method, a mobile control method, and a safety auxiliary control method for controlling the intelligent closed tower cooling spraying and cleaning multiplexing system.

[0019] The temperature-reducing cleaning reuse 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 temperature-reducing set value, the control device controls the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series to be opened, and controls the high-pressure pump to be started; when the temperature sensor at the medium outlet of a single heat exchanger senses that the medium temperature is lower than the temperature-reducing set value, the high-pressure pump is controlled to stop working, and then the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series 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 temperature-reducing set value, the control device controls the mobile spraying devices above the multiple corresponding heat exchangers and the electromagnetic valves connected in series to be opened at the same time, and controls the high-pressure pump to be started; when the temperature sensor at the medium outlet of any heat exchanger senses that the medium temperature is lower than the temperature-reducing set value, the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series are controlled to be closed, and the high-pressure pump is controlled to stop working before the last electromagnetic valve is closed, and then the last electromagnetic valve is controlled to be closed.

[0020] 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 spraying device above the corresponding heat exchanger to be started and the electromagnetic valve connected in series to be opened, and controls the high-pressure pump to be started, so as to spray and clean the corresponding heat exchanger; when the temperature sensor at the medium outlet of a single heat exchanger senses that the medium temperature is lower than the cleaning set value, the high-pressure pump is controlled to be closed first, and then the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series 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 spraying device above one of the corresponding heat exchangers to be started and the electromagnetic valve connected in series to be opened, and controls the high-pressure pump to be started, so as to spray and clean the corresponding heat exchanger; when the temperature sensor at the medium outlet of the corresponding heat exchanger senses that the medium temperature is lower than the cleaning set value, the high-pressure pump is controlled to be closed first, and then the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series are controlled to be closed, and the other heat exchangers are gradually cleaned in the same way in turn.

[0021] The mobile control method comprises: when the control device controls the mobile spraying device to be started, the control device controls the driving motor of the mobile spraying device to drive the mobile mechanism to move the spraying head; when the mobile mechanism touches the limit switch, the control device controls the driving motor to reversely drive the mobile mechanism, so that the mobile mechanism moves back and forth; and the control device controls the moving speed and the number of back-and-forth movements of the mobile mechanism.

[0022] The safety auxiliary control method comprises: when the pressure sensed by the pressure sensor is higher than the preset safety value, the control device controls the safety pressure relief electric valve to be opened, controls the high-pressure pump to be closed, and triggers the valve fault alarm; otherwise, the control device controls the safety pressure relief electric valve to be closed.

[0023] In an embodiment, the cleaning control method is prior to the temperature reduction cleaning reuse control method.

[0024] In an embodiment, the cleaning set value is higher than the temperature reduction set value.

[0025] In an embodiment, when a heat exchanger stops working, the control device skips cleaning work on the corresponding heat exchanger in the cleaning control method.

[0026] The advantages or beneficial effects of the above technical solutions at least include: through the cooperation of the temperature reduction cleaning reuse control method, the cleaning control method, the moving control method and the safety auxiliary control method, the opening and closing of the moving spray device and the electromagnetic valve connected in series can be controlled, so that high-pressure spray cleaning of the heat exchanger in need of cleaning can be performed in sequence, and spray cooling of the heat exchanger in need of temperature reduction can be performed at the same time, the moving spray device can spray and cool the heat exchanger at the same time, and the water pressure during cleaning is sufficient to clean the surface of the heat exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings illustrate exemplary embodiments of the present application and together with the general description given above, explain the principles of the application. These drawings are included herewith to provide further understanding of the present application and are incorporated in and constitute a part of the specification.

[0028] Figure 1 A structure diagram of an intelligent closed tower temperature reduction spray and cleaning reuse system according to an exemplary embodiment of the present application is shown;

[0029] Figure 2 A structure diagram of a moving spray device according to an exemplary embodiment of the present application is shown;

[0030] Figure 3 A structure diagram of a heat exchanger according to an exemplary embodiment of the present application is shown.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 1. High-pressure pump;

[0033] 2. Water source;

[0034] 3. Heat exchange group;

[0035] 31. Moving spray device; 311. Moving mechanism; 312. Spray head; 313. Drive motor; 314. Limit switch; 32. Electromagnetic valve; 33. Heat exchanger; 331. Temperature sensor;

[0036] 4. Control device;

[0037] 5. pressure sensor;

[0038] 6. safety relief electric valve. DETAILED DESCRIPTION

[0039] Embodiments of the present application will be described in more detail with reference to the drawings. While several embodiments of the application are shown in the drawings, it is not intended that the application be limited to the embodiments shown, but rather, the application is intended to cover all modifications and alternatives coming within the scope of the application. It should be understood that the drawings and detailed description thereto are not intended to limit the scope of the present application.

[0040] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0041] It should be understood that the various steps of the method embodiments of the present application can be executed in different orders and / or in parallel. In addition, the method embodiments can include additional steps and / or omit the execution of the steps shown. The scope of the present application is not limited in this respect.

[0042] The term "comprising" and variations thereof as used in the present application are open-ended, that is, "including but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Related definitions are given throughout the detailed description. It should be noted that the concepts mentioned in the present application are merely used to distinguish different devices, modules or units, and are not intended to limit the functions performed by these devices, modules or units.

[0043] It should be noted that the modification of "one" or "multiple" mentioned in the present application is illustrative and not limiting, and those skilled in the art should understand that, unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0044] The names of the messages or information exchanged between the devices in the embodiments of the present application are only for illustrative purposes, and are not intended to limit the scope of the messages or information.

[0045] Referring to Figure 1 The embodiments of the present application provide a smart closed tower cooling and cleaning system, which comprises a heat exchange group 3 connected with a water source 2 through a high-pressure pump 1 and a control device 4.

[0046] The heat exchange group 3 comprises a plurality of mobile spraying devices 31 connected in parallel with each other, a plurality of electromagnetic valves 32 connected in series between the high-pressure pump 1 and the mobile spraying devices 31, and a heat exchanger 33 arranged below the mobile spraying devices 31;

[0047] The control device 4 comprises a cooling spraying and cleaning multiplexing control unit for controlling the start and stop of the high-pressure pump 1, for controlling the opening and closing of the plurality of electromagnetic valves 32 and the start and stop of the mobile spraying devices 31 connected in series therewith.

[0048] With the above structure, when the closed tower is cooled and sprayed and cleaned in a multiplexing manner, the water source 2 is input into the heat exchange group 3 by the high-pressure pump 1, the water source 2 and the heat exchange group 3, and the opening and closing of the electromagnetic valves 32 and the start and stop of the mobile spraying devices 31 are controlled by the control device 4, so that the water pressure input into the heat exchange group 3 is high pressure, and simultaneous cooling spraying and sequential cleaning of the plurality of heat exchangers 33 can be realized, thereby ensuring that the closed tower has the functions of cooling spraying and cleaning, and the cleaning efficiency of the closed tower can be improved during cleaning, manual cleaning can be avoided, and damage during cleaning can be prevented.

[0049] In one embodiment, referring to Figure 1 , Figure 2 and Figure 3 , the mobile spraying device 31 comprises a mobile mechanism 311, a spraying head 312 and a driving motor 313, the spraying head 312 is arranged on the mobile mechanism 311, the spraying head 312 is connected with the electromagnetic valve 32, and the output end of the driving motor 313 is drivingly connected with the mobile mechanism 311. Among them, the spraying head 312 can be arranged in plurality and arranged in sequence on the mobile mechanism 311; in actual application, the driving force of the driving motor 313 can drive the mobile mechanism 311 to move along the heat exchanger 33.

[0050] The mobile spraying device 31 further comprises two limit switches 314, the two limit switches 314 are respectively arranged at both ends of the stroke of the mobile mechanism 311, and the both ends of the stroke respectively correspond to both ends of the heat exchanger 33. In actual application, the two limit switches 314 of the mobile spraying device 31 can limit the stroke end of the mobile mechanism 311, so as to control the reciprocating movement of the mobile mechanism 311.

[0051] The high-pressure pump 1 is connected with the heat exchange group 3 with a pressure sensor 5 and a safety pressure relief electric valve 6. In actual application, through the cooperation of the pressure sensor 5 and the safety pressure relief electric valve 6, the pressure sensor 5 can sense the water pressure of the water pipeline between the high-pressure pump 1 and the heat exchange group 3, and can control the opening and closing of the safety pressure relief electric valve 6 according to the sensed water pressure by the control device 4, so as to prevent the pressure relief of the pipeline when the solenoid valve 32 is damaged and not opened.

[0052] The control device 4 further comprises a safety pressure relief control unit for controlling the opening and closing of the safety pressure relief electric valve 6. In actual application, 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 according to the water pressure sensed by the pressure sensor 5.

[0053] 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 application, by setting 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 moving spraying device 31 according to the sensed temperature.

[0054] Referring to Figure 1 , Figure 2 and Figure 3 , the embodiment of the present application provides a control method of an intelligent closed tower cooling spraying and cleaning multiplex system, which comprises a cooling and cleaning multiplex control method, a cleaning control method, a moving control method and a safety auxiliary control method for controlling the intelligent closed tower cooling spraying and cleaning multiplex system.

[0055] The temperature-reducing cleaning reuse 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 temperature-reducing set value, the control device 4 controls the mobile spraying device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series to be opened, and controls the high-pressure pump 1 to be started; when the temperature sensor 331 at the medium outlet of a single heat exchanger 33 senses that the medium temperature is lower than the temperature-reducing set value, the control device 4 controls the mobile spraying device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series to be closed after the high-pressure pump 1 is stopped; when the temperature sensors 331 at the medium outlets of multiple heat exchangers 33 simultaneously sense that the medium temperature is higher than the temperature-reducing set value, the control device 4 controls the mobile spraying devices 31 above the corresponding heat exchangers 33 and the electromagnetic valves 32 connected in series to be opened simultaneously, and controls the high-pressure pump 1 to be started; when the temperature sensor 331 at the medium outlet of any heat exchanger 33 senses that the medium temperature is lower than the temperature-reducing set value, the control device 4 controls the mobile spraying device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series to be closed, and controls the high-pressure pump 1 to be stopped after the last electromagnetic valve 32 is closed.

[0056] 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 spraying device 31 above the corresponding heat exchanger 33 to be started and the electromagnetic valve 32 connected in series to be opened, and controls the high-pressure pump 1 to be started, so as to spray and clean the corresponding heat exchanger 33; when the temperature sensor 331 at the medium outlet of a single heat exchanger 33 senses that the medium temperature is lower than the cleaning set value, the control device 4 controls the mobile spraying device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series to be closed after the high-pressure pump 1 is stopped; when the temperature sensors 331 at the medium outlets of multiple heat exchangers 33 simultaneously sense that the medium temperature is higher than the cleaning set value, the control device 4 controls the mobile spraying device 31 above one of the corresponding heat exchangers 33 to be started and the electromagnetic valve 32 connected in series to be opened, and controls the high-pressure pump 1 to be started, so as to spray and clean the corresponding heat exchanger 33; when the temperature sensor 331 at the medium outlet of the corresponding heat exchanger 33 senses that the medium temperature is lower than the cleaning set value, the control device 4 controls the mobile spraying device 31 above the corresponding heat exchanger 33 and the electromagnetic valve 32 connected in series to be closed after the high-pressure pump 1 is stopped, and then gradually cleans other heat exchangers 33 in the same way;

[0057] The movement control method comprises: when the control device 4 controls the mobile spraying device 31 to start, the control device 4 controls the driving motor 313 of the mobile spraying device 31 to drive the mobile mechanism 311 to move the spraying head 312, and when the mobile mechanism 311 touches the limit switch, the control device 4 controls the driving motor 313 to reversely drive the mobile mechanism 311 to move the mobile mechanism 311 back and forth, and controls the moving speed of the mobile mechanism 311 and the number of times of back and forth movement;

[0058] The safety auxiliary control method comprises: 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 fault alarm, and vice versa, controls the safety pressure relief electric valve 6 to close.

[0059] With the above structure, through the cooperation of the above cooling and cleaning multiplex control method, the cleaning control method, the movement control method and the safety auxiliary control method, the opening and closing of the mobile spraying device 31 and the electromagnetic valve 32 connected in series can be controlled, so that the high-pressure spraying cleaning of the heat exchanger 33 needing cleaning can be realized in sequence, and the spraying cooling of the heat exchanger 33 needing cooling can be realized at the same time, so that the mobile spraying device 31 can spray and cool the heat exchanger 33 at the same time, and ensure that the water pressure during cleaning is enough to clean the surface of the heat exchanger 33.

[0060] The cleaning control method is prior to the cooling and cleaning multiplex 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 after the last heat exchanger 33 is cleaned, the heat exchanger 33 is cooled.

[0061] The cleaning set value is higher than the cooling set value. That is, when the heat exchanger 33 is cooled by the cooling and cleaning multiplex control method, it is difficult to reduce the temperature of the medium in the heat exchanger 33, and the temperature gradually rises, which indicates that the surface of the heat exchanger 33 needs to be cleaned, so that the heat exchanger 33 needing cleaning can be clearly sensed.

[0062] In the cleaning control method, when the heat exchanger 33 stops working, the control device 4 skips the cleaning work of the corresponding heat exchanger 33. In actual application, when the heat exchanger 33 stops working, the cleaning work of the heat exchanger 33 is automatically skipped, which can reduce the useless cleaning time and improve the cleaning efficiency.

[0063] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0064] Those skilled in the art will understand that the above embodiments are only for the purpose of clearly illustrating the application, and are not intended to limit the scope of the application. Other changes or modifications can be made by those skilled in the art based on the above application, and these changes or modifications are still within the scope of the application.

Claims

1. A control method of an intelligent closed tower cooling, spraying and cleaning multiplex system, characterized in that, The system comprises a heat exchange group connected with a water source through a high-pressure pump and a control device; The heat exchange group comprises a plurality of mobile spraying devices connected in parallel with each other, a plurality of electromagnetic valves connected in series between the high-pressure pump and the mobile spraying devices, and a heat exchanger arranged below the mobile spraying devices; The control device comprises a cooling spraying and cleaning multiplexing control unit, which is used for controlling the start and stop of the high-pressure pump, the opening and closing of the plurality of electromagnetic valves and the start and stop of the mobile spraying devices connected in series with the electromagnetic valves; The mobile spraying device comprises a mobile mechanism, a spraying head and a driving motor, the spraying head is arranged on the mobile mechanism, the spraying head is connected with the electromagnetic valve, and the output end of the driving motor is drivingly connected with the mobile mechanism; The high-pressure pump and the heat exchange group are connected with a pressure sensor and a safety pressure relief electric valve; The control method comprises a cooling and cleaning multiplexing control method, a cleaning control method, a mobile control method and a safety auxiliary control method for controlling the intelligent closed tower cooling and cleaning multiplexing system; The cooling and cleaning multiplexing control method comprises the following steps: when the temperature sensor at the medium outlet of a single heat exchanger senses that the medium temperature is higher than the cooling set value, the control device controls the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series with the mobile spraying device to be opened, and controls the high-pressure pump to be started; when the temperature sensor at the medium outlet of the single heat exchanger senses that the medium temperature is lower than the cooling set value, the high-pressure pump is stopped, and then the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series with the mobile spraying device are controlled to be closed; when the temperature sensors at the medium outlets of a plurality of heat exchangers simultaneously sense that the medium temperatures are higher than the cooling set value, the control device controls the mobile spraying devices above the plurality of corresponding heat exchangers and the electromagnetic valves connected in series with the mobile spraying devices to be opened at the same time, and controls the high-pressure pump to be started; when the temperature sensor at the medium outlet of any heat exchanger senses that the medium temperature is lower than the cooling set value, the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series with the mobile spraying device are controlled to be closed, and until the last electromagnetic valve is closed, the high-pressure pump is stopped, and then the last electromagnetic valve is controlled to be closed. 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 spraying device above the corresponding heat exchanger to start and the electromagnetic valve connected in series to open, and controls the high-pressure pump to start, so as to spray and clean the corresponding heat exchanger; when the temperature sensor at the medium outlet of a single heat exchanger senses that the medium temperature is lower than the cleaning set value, the control device controls the high-pressure pump to stop first, and then controls the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series to stop; 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 spraying device above one of the corresponding heat exchangers to start and the electromagnetic valve connected in series to open, and controls the high-pressure pump to start, so as to spray and clean the corresponding heat exchanger; when the temperature sensor at the medium outlet of the corresponding heat exchanger senses that the medium temperature is lower than the cleaning set value, the control device controls the high-pressure pump to stop first, and then controls the mobile spraying device above the corresponding heat exchanger and the electromagnetic valve connected in series to stop, and then gradually cleans the other heat exchangers in the same way. The movement control method comprises: when the control device controls the mobile spraying device to start, the control device controls the driving motor of the mobile spraying device to drive the mobile mechanism to move the spraying head; when the mobile mechanism touches the limit switch, the control device controls the driving motor to reversely drive the mobile mechanism to reciprocate, and controls the movement speed and the reciprocation times of the mobile mechanism. The safety auxiliary control method comprises: when the pressure sensor senses that the pressure is higher than the preset safety value, the control device controls the safety pressure relief electric valve to open, controls the high-pressure pump to stop, and triggers the valve fault alarm; otherwise, the control device controls the safety pressure relief electric valve to close.

2. The control method of the intelligent closed-tower cooling, spraying and cleaning multiplex system according to claim 1, characterized in that, The mobile spraying device further comprises two limit switches, which are arranged at both ends of the stroke of the mobile mechanism, and correspond to both ends of the heat exchanger respectively.

3. The control method of the intelligent closed-tower cooling, spraying and cleaning multiplex system according to claim 1, 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.

4. The control method of the intelligent closed-tower cooling, spraying and cleaning multiplex 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.

5. The control method of the intelligent closed tower cooling spraying and cleaning multiplex system according to claim 1, wherein the cleaning control method is prior to the cooling and cleaning multiplex control method.

6. The control method of the intelligent closed tower cooling spraying and cleaning multiplex system according to claim 1, wherein the cleaning set value is higher than the cooling set value.

7. The control method of the intelligent closed tower cooling spraying and cleaning multiplex system according to claim 1, wherein when a heat exchanger stops working, the control device skips the cleaning work of the corresponding heat exchanger.

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