CN106288602A - A kind of industrial cooling circulating water system and control method thereof - Google Patents
A kind of industrial cooling circulating water system and control method thereof Download PDFInfo
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- CN106288602A CN106288602A CN201510347538.4A CN201510347538A CN106288602A CN 106288602 A CN106288602 A CN 106288602A CN 201510347538 A CN201510347538 A CN 201510347538A CN 106288602 A CN106288602 A CN 106288602A
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Abstract
The invention discloses a kind of industrial cooling circulating water system, including cooling tower, cooling pond and water pump, the water inlet end of the connection cooling pond, water side of described cooling tower, in cooling pond, be provided with fluid level transmitter；The water side of described cooling pond is connected to water pump, totally 3 and be arranged in parallel, water pump, the water side of water pump is connected to, with water pipe, be respectively connecting to multiple watering equipment with water pipe, the recirculation water of watering equipment, in return duct sends into cooling tower, return duct is additionally provided with return water temperature transmitter；Described industrial cooling circulating water system also includes converter, remote control terminal, human-machine operation terminal and PLC；The control method of a kind of industrial cooling circulating water system, including water pump control method and blower control method in starting mode of pump method, running；This industrial cooling circulating water system structure improvement, and its control method uses " first open and first stop " and the principle that switches the most in turn, prolongation water pump and the service life of blower fan, cost-effective for factory.
Description
Technical field
The present invention relates to cooling water system technical field, specifically a kind of industrial cooling circulating water system and control method thereof.
Background technology
Cooling water system is divided into once-through cooling water system and recirculating cooling water system, if i.e. discharged after cold water cooling production equipment, now cold water is only with once, claims once-through cooling water system；Making intensification cold water flow through cooling device makes water temperature return fall, produce equipment by pumped back to reuse, claim recirculating cooling water system, the consumption of the cold water of recirculating cooling water system is substantially reduced, more than 95% can be saved, cooling water accounts for about the 70% of industrial water consumption, therefore, recirculating cooling water system has played the effect of a large amount of water for industrial use of saving, it is used widely in the industry, existing cooling water system is not perfect, cannot Intelligent adjustment, especially for cooling conveying pump, due to all of cooling water watering equipment non-required persistently with water, therefore the cooling water pressure needed for cooling water system is not stopping change, but all cooling conveying pumps of cooling water system uninterruptedly operate at power frequency operation at present always, cannot Intelligent adjustment cooling conveying pump duty.
Summary of the invention
It is an object of the invention to provide a kind of industrial cooling circulating water system and control method thereof, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme: a kind of industrial cooling circulating water system, including cooling tower, cooling pond and water pump, the water inlet end of the connection cooling pond, water side of described cooling tower, filling pipe it is additionally provided with on cooling pond, filling pipe is provided with moisturizing electromagnetic valve, is provided with fluid level transmitter in cooling pond；The water side of described cooling pond is connected to water pump, totally 3, water pump, it is respectively water pump A, water pump B and water pump C, water pump A, water pump B and water pump C are arranged in parallel, the water side of water pump is connected to, with water pipe, with being additionally provided with water pushing pressure transmitter on water pipe and sending coolant-temperature gage transmitter, be respectively connecting to multiple watering equipment with water pipe, the recirculation water of watering equipment, in return duct sends into cooling tower, return duct is additionally provided with return water temperature transmitter；Described cooling tower is provided with cooling tower blower fan；nullDescribed industrial cooling circulating water system also includes converter、Remote control terminal、Human-machine operation terminal and PLC，Remote control terminal is connected to human-machine operation terminal，Human-machine operation terminal is connected to PLC，Fluid level transmitter、Water pushing pressure transmitter、Coolant-temperature gage transmitter and return water temperature transmitter is sent to be serially connected，And the signal output part of four is connected to PLC，Water pump A、Water pump B、Water pump C and cooling tower blower fan are parallel with one another，And four place wire on be in series with corresponding KM1 respectively、KM2、KM3 and KM4，KM1、KM2、KM3 and KM4M is by PLC control，Converter one end is connected to PLC，The other end is respectively connecting to water pump A、Water pump B and water pump C，Converter and water pump A、It is respectively equipped with KM1-1 in what water pump B and water pump C was connected three of the wires、KM2-1 and KM3-1，KM1-1、KM2-1 and KM3-1 is by PLC control；Described cooling tower blower fan is connected to PLC；Described moisturizing electromagnetic valve is connected to PLC.
As the further scheme of the present invention: be additionally provided with spray pump in described cooling tower.
The control method of a kind of industrial cooling circulating water system, including water pump control method and blower control method in starting mode of pump method, running；The step of described starting mode of pump method is as follows: the first step, start the last time water pump of converting operation, this water pump named first water pump when shutting down；Second step, the first pump variable frequency run, until cooling water pressure reaches to set pressure；3rd step, during second step, if the first water pump reaches maximum (top) speed, cooling water pressure be still below set pressure, then carry out next step, otherwise, keep the first water pump operation state；4th step, the first water pump is switched to power frequency operation, start the second water pump and put into converting operation, until cooling water pressure reaches to set pressure；5th step, during the 4th step, if the second water pump reaches maximum (top) speed, cooling water pressure be still below set pressure, then carry out next step, otherwise, keep water pump operation state；6th step, the second water pump is switched to power frequency operation, start the 3rd water pump and also put into converting operation, until cooling water pressure reaches to set pressure.
In described running, the step of the control method of water pump is as follows: the first step, judge that cooling water pressure whether less than setting pressure, the most then carries out the 6th step, otherwise, carries out second step；Second step, judge that cooling water pressure whether equal to setting pressure, the most then keeps water pump operation state, otherwise, carries out next step；3rd step, the water pump come into operation at first is disabled, regulate the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；4th step, in three step process, if the water pump of converting operation reaches minimum speed, cooling water pressure remains above setting pressure, then carry out next step, otherwise, keep water pump operation state；5th step, the water pump that second puts into operation is disabled, regulate the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；6th step, improve the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；7th step, in six-step process, if the water pump of current converting operation reaches maximum (top) speed, cooling water pressure is still below setting pressure, then carry out next step, otherwise, keeps water pump operation state；8th step, the water pump of current converting operation is switched to power frequency state, the water pump that idle is put into converting operation state, until cooling water pressure reaches to set pressure；9th step, during the 8th step, if the water pump of current converting operation reaches maximum (top) speed, cooling water pressure is still below setting pressure, then carry out next step, otherwise, keeps water pump operation state；Tenth step, the water pump of current converting operation is switched to power frequency state, idle for residue water pump is put into converting operation state, until cooling water pressure reaches to set pressure.
The step of described blower control method is as follows: if first step cooling water pump runs and cooling water send coolant-temperature gage to be higher than the start-up temperature that cooling tower sets, then starts blower fan, otherwise, carries out next step；Second step, blower fan are out of service.
As the further scheme of the present invention: in described running in water pump control method, if the most only separate unit water pump operation, when this water pump accumulated running time reaches to switch setting value, switch to next water pump operation.
As the present invention further scheme: in described running in water pump control method, if overload or fault alarm occurs in certain water pump, this water pump is out of service, and residue water pump is run by above-mentioned steps.
As the present invention further scheme: in described running in water pump control method, if cooling water water pushing pressure is less than the low pressure limit value set or higher than the upper pressure limit value set, system alarm.
As the present invention further scheme: described blower control method changes to following steps: if first step cooling water pump runs and cooling water send coolant-temperature gage to be higher than the start-up temperature that cooling tower sets, then carrying out next step, otherwise, blower fan stops；Second step, startup blower fan；3rd step, variable frequency adjustment rotation speed of fan, keep cooling water temperature constant, and this blower control method is applicable to large-scale cooling tower.
As the present invention further scheme: described blower control method changes to following steps: if first step cooling aquametry temperature is equal to design temperature, then keeps fan operation state, otherwise, carries out next step；If second step cooling aquametry temperature is less than design temperature, then all blower fan is out of service, otherwise, carries out next step；3rd step, the temperature difference calculated between cooling water design temperature and cooling aquametry temperature；If the 4th step temperature difference is more than threshold values, then carries out the 4th step, otherwise, carry out the 5th step；4th step, all blower fans all put into operation, quickly reduce cooling water temperature；5th step, it is gradually lowered fan operation quantity, makes cooling water temperature be gradually lowered, and constant to design temperature.
Compared with prior art, the invention has the beneficial effects as follows: this industrial cooling circulating water system structure improvement, and its control method uses " first open and first stop " and the principle switched the most in turn, extend water pump and the service life of blower fan, by converter variable frequency adjustment blower fan or the power of water pump, reach energy-conservation purpose, cost-effective for factory.
Accompanying drawing explanation
Fig. 1 is the structural representation of industrial cooling circulating water system.
Fig. 2 is the electrical structure schematic diagram of industrial cooling circulating water system.
Fig. 3 be industrial cooling circulating water system control method in the logic chart of starting mode of pump method.
Fig. 4 be industrial cooling circulating water system control method in the logic chart of water pump control method in running.
Fig. 5 is the logic chart of blower control method in the control method of industrial cooling circulating water system in embodiment 1.
Fig. 6 is the logic chart of blower control method in the control method of industrial cooling circulating water system in embodiment 2.
Fig. 7 is the logic chart of blower control method in the control method of industrial cooling circulating water system in embodiment 3.
Flow, time and the running status figure that Fig. 8 is three water pumps when running according to the control method of industrial cooling circulating water system of the present invention.
In figure: 1-cooling tower, 2-cooling pond, 3-fluid level transmitter, 4-moisturizing electromagnetic valve, 5-water pump A, 6-water pump B, 7-water pump C, 8-water pushing pressure transmitter, 9-send coolant-temperature gage transmitter, 10-watering equipment, 11-converter, 12-remote control terminal, 13-human-machine operation terminal, 14-PLC, 15-cooling tower blower fan.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical scheme of this patent is described in more detail.
Embodiment 1: referring to Fig. 1-2, a kind of industrial cooling circulating water system, including cooling tower 1, cooling pond 2 and water pump；The water inlet end of the connection cooling pond, water side 2 of described cooling tower 1, cooling pond 2 is additionally provided with filling pipe, and filling pipe is provided with moisturizing electromagnetic valve 4, is provided with fluid level transmitter 3 in cooling pond 2, and fluid level transmitter 3 is for monitoring the liquid level in cooling pond 2；The water side of described cooling pond 2 is connected to water pump, totally 3, water pump, it is respectively water pump A 5, water pump B 6 and water pump C 7, water pump A 5, water pump B 6 and water pump C 7 are arranged in parallel, the water side of water pump is connected to, with water pipe, with being additionally provided with water pushing pressure transmitter 8 on water pipe and sending coolant-temperature gage transmitter 9, be respectively connecting to multiple watering equipment 10 with water pipe, the recirculation water of watering equipment 10, in return duct sends into cooling tower 1, return duct is additionally provided with return water temperature transmitter 11；Described cooling tower 1 is provided with cooling tower blower fan 15, for lowering the temperature the water in cooling tower 1；nullDescribed industrial cooling circulating water system also includes converter 11、Remote control terminal 12、Human-machine operation terminal 13 and PLC 14，Remote control terminal 12 is connected to human-machine operation terminal 13，Human-machine operation terminal 13 is connected to PLC 14，Fluid level transmitter 3、Water pushing pressure transmitter 8、Coolant-temperature gage transmitter 9 and return water temperature transmitter 11 is sent to be serially connected，And the signal output part of four is connected to PLC 14，The data of acquisition are sent to PLC 14，Water pump A 5、Water pump B 6、Water pump C 7 and cooling tower blower fan 15 are parallel with one another，And four place wire on be in series with corresponding KM1 respectively、KM2、KM3 and KM4，KM1、KM2、KM3 and KM4 is controlled by PLC 14，Converter 11 one end is connected to PLC 14，The other end is respectively connecting to water pump A 5、Water pump B 6 and water pump C 7，Converter 11 and water pump A 5、It is respectively equipped with KM1-1 in what water pump B 6 and water pump C 7 was connected three of the wires、KM2-1 and KM3-1，KM1-1、KM2-1 and KM3-1 is controlled by PLC 14，By controlling KM1-1、Certain A.C. contactor Guan Bi in KM2-1 and KM3-1 three，Control converter 11 to be connected with corresponding water pump，To control the operation of corresponding water pump；Described cooling tower blower fan 15 is connected to PLC 14, PLC 14 and controls the operation of cooling tower blower fan 15, is additionally provided with spray pump in cooling tower 1；Described moisturizing electromagnetic valve 4 is connected to PLC 14, PLC 14 and obtains the liquid level data in cooling pond 2 by fluid level transmitter 3, and processes data, needs to open moisturizing electromagnetic valve 4 for cooling pond 2 moisturizing judging whether.
nullDescribed industrial cooling circulating water system，Cooling water in cooling tower 1 is sent in cooling pond 2，Fluid level transmitter 3 in cooling pond 2 is for monitoring the liquid level in cooling pond 2，Water in cooling pond 2 is extracted out by water pump，And be sent to use water pipe，And by with the water pushing pressure transmitter 8 on water pipe with send the hydraulic pressure and water temperature that coolant-temperature gage transmitter 9 monitors pump outlet，With water pipe, cooling water is sent in each watering equipment 10，The recirculation water of watering equipment 10 is in return duct sends into cooling tower 1，The return water temperature transmitter 11 of return duct is used for monitoring recirculation water temperature，Fluid level transmitter 3、Water pushing pressure transmitter 8、Coolant-temperature gage transmitter 9 and return water temperature transmitter 11 is sent all to be sent to PLC process by each obtaining data，PLC controls three water pumps and the running status of cooling blower according to result.
Referring to Fig. 3-5, the control method of a kind of industrial cooling circulating water system, including water pump control method and blower control method in starting mode of pump method, running；The step of described starting mode of pump method is as follows: the first step, start the last time water pump of converting operation, this water pump named first water pump when shutting down；Second step, the first pump variable frequency run, until cooling water pressure reaches to set pressure；3rd step, during second step, if the first water pump reaches maximum (top) speed, cooling water pressure be still below set pressure, then carry out next step, otherwise, keep the first water pump operation state；4th step, the first water pump is switched to power frequency operation, start the second water pump and put into converting operation, until cooling water pressure reaches to set pressure；5th step, during the 4th step, if the second water pump reaches maximum (top) speed, cooling water pressure be still below set pressure, then carry out next step, otherwise, keep water pump operation state；6th step, the second water pump is switched to power frequency operation, start the 3rd water pump and also put into converting operation, until cooling water pressure reaches to set pressure；In described running, the step of the control method of water pump is as follows: the first step, judge that cooling water pressure whether less than setting pressure, the most then carries out the 6th step, otherwise, carries out second step；Second step, judge that cooling water pressure whether equal to setting pressure, the most then keeps water pump operation state, otherwise, carries out next step；3rd step, the water pump come into operation at first is disabled, regulate the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；4th step, in three step process, if the water pump of converting operation reaches minimum speed, cooling water pressure remains above setting pressure, then carry out next step, otherwise, keep water pump operation state；5th step, the water pump that second puts into operation is disabled, regulate the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；6th step, improve the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；7th step, in six-step process, if the water pump of current converting operation reaches maximum (top) speed, cooling water pressure is still below setting pressure, then carry out next step, otherwise, keeps water pump operation state；8th step, the water pump of current converting operation is switched to power frequency state, the water pump that idle is put into converting operation state, until cooling water pressure reaches to set pressure；9th step, during the 8th step, if the water pump of current converting operation reaches maximum (top) speed, cooling water pressure is still below setting pressure, then carry out next step, otherwise, keeps water pump operation state；Tenth step, the water pump of current converting operation is switched to power frequency state, idle for residue water pump is put into converting operation state, until cooling water pressure reaches to set pressure；If the 11st step the most only separate unit water pump operation, when this water pump accumulated running time reaches to switch setting value, switch to next water pump operation；12nd step, during above-mentioned steps, during if overload or fault alarm occurs in certain water pump, this water pump is out of service, and residue water pump is run by above-mentioned steps；13rd step, during above-mentioned steps, if cooling water water pushing pressure less than set low pressure limit value or higher than set upper pressure limit value, system alarm.
In described running, the control method of water pump uses " first open and first stop " and the principle switched the most in turn, extends the service life of water pump.
The step of described blower control method is as follows: if first step cooling water pump runs and cooling water send coolant-temperature gage to be higher than the start-up temperature that cooling tower sets, then starts blower fan, otherwise, carries out next step；Second step, blower fan are out of service, and this blower control method is applicable to small-sized cooling tower.
Embodiment 2: refer to Fig. 6, replaces blower control method, and other are same as in Example 1, described blower control method changes to following steps: if first step cooling water pump runs and cooling water send coolant-temperature gage to be higher than the start-up temperature that cooling tower sets, then carrying out next step, otherwise, blower fan stops；Second step, startup blower fan；3rd step, variable frequency adjustment rotation speed of fan, keep cooling water temperature constant.This blower control method is applicable to large-scale cooling tower.
Embodiment 3: refer to Fig. 7, replaces blower control method, and other are same as in Example 1, and described blower control method changes to following steps: if first step cooling aquametry temperature is equal to design temperature, then keeps fan operation state, otherwise, carries out next step；If second step cooling aquametry temperature is less than design temperature, then all blower fan is out of service, otherwise, carries out next step；3rd step, the temperature difference calculated between cooling water design temperature and cooling aquametry temperature；If the 4th step temperature difference is more than threshold values, then carries out the 4th step, otherwise, carry out the 5th step；4th step, all blower fans all put into operation, quickly reduce cooling water temperature；5th step, it is gradually lowered fan operation quantity, cooling water temperature is made to be gradually lowered, and it is constant to design temperature, this blower control method is applicable to the water tower that multiple stage is in parallel, this blower control method is identical with the control method of water pump in running, same employing " first open and first stop " and the principle switched the most in turn, to extend service life of fan.
Fig. 8 is water pump A, these three water pumps of water pump B and water pump C are in practical work process, flow, time and running status figure when running according to the control method of industrial cooling circulating water system of the present invention, compared with traditional method of operation, synthesis energy saving up to 50% is run according to the control method of industrial cooling circulating water system of the present invention, and three water pumps run in turn, run time phase difference the least, extend the service life of water pump.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art is possessed, it is also possible to various changes can be made on the premise of without departing from this patent objective.
Claims (8)
1. an industrial cooling circulating water system, including cooling tower (1), cooling pond (2) and water pump, it is characterized in that, the water inlet end of the connection cooling pond, water side (2) of described cooling tower (1), cooling pond is additionally provided with filling pipe on (2), filling pipe is provided with moisturizing electromagnetic valve (4), is provided with fluid level transmitter (3) in cooling pond (2)；The water side of described cooling pond (2) is connected to water pump, totally 3, water pump, be respectively water pump A(5), water pump B(6) and water pump C(7), water pump A(5), water pump B(6) and water pump C(7) be arranged in parallel, the water side of water pump is connected to water pipe, with being additionally provided with water pushing pressure transmitter (8) on water pipe and sending coolant-temperature gage transmitter (9), it is respectively connecting to multiple watering equipment (10) with water pipe, the recirculation water of watering equipment (10), in return duct sends into cooling tower (1), return duct is additionally provided with return water temperature transmitter (11)；Described cooling tower 1 is provided with cooling tower blower fan (15)；nullDescribed industrial cooling circulating water system also includes converter (11)、Remote control terminal (12)、Human-machine operation terminal (13) and PLC(14)，Remote control terminal (12) is connected to human-machine operation terminal (13)，Human-machine operation terminal (13) is connected to PLC(14)，Fluid level transmitter (3)、Water pushing pressure transmitter (8)、Coolant-temperature gage transmitter (9) and return water temperature transmitter (11) is sent to be serially connected，And the signal output part of four is connected to PLC(14)，Water pump A(5)、Water pump B(6)、Water pump C(7) and cooling tower blower fan (15) parallel with one another，And four place wire on be in series with corresponding KM1 respectively、KM2、KM3 and KM4，KM1、KM2、KM3 and KM4 is by PLC(14) control，Converter (11) one end is connected to PLC(14)，The other end is respectively connecting to water pump A(5)、Water pump B(6) and water pump C(7)，Converter (11) and water pump A(5)、Water pump B(6) with water pump C(7) be connected three of the wires on be respectively equipped with KM1-1、KM2-1 and KM3-1，KM1-1、KM2-1 and KM3-1 is by PLC(14) control；Described cooling tower blower fan (15) is connected to PLC(14)；Described moisturizing electromagnetic valve (4) is connected to PLC(14).
Industrial cooling circulating water system the most according to claim 1, it is characterised in that described cooling tower is additionally provided with spray pump in (1).
3. the control method of an industrial cooling circulating water system, it is characterised in that include water pump control method and blower control method in starting mode of pump method, running；The step of described starting mode of pump method is as follows: the first step, start the last time water pump of converting operation, this water pump named first water pump when shutting down；Second step, the first pump variable frequency run, until cooling water pressure reaches to set pressure；3rd step, during second step, if the first water pump reaches maximum (top) speed, cooling water pressure be still below set pressure, then carry out next step, otherwise, keep the first water pump operation state；4th step, the first water pump is switched to power frequency operation, start the second water pump and put into converting operation, until cooling water pressure reaches to set pressure；5th step, during the 4th step, if the second water pump reaches maximum (top) speed, cooling water pressure be still below set pressure, then carry out next step, otherwise, keep water pump operation state；6th step, the second water pump is switched to power frequency operation, start the 3rd water pump and also put into converting operation, until cooling water pressure reaches to set pressure；In described running, the step of the control method of water pump is as follows: the first step, judge that cooling water pressure whether less than setting pressure, the most then carries out the 6th step, otherwise, carries out second step；Second step, judge that cooling water pressure whether equal to setting pressure, the most then keeps water pump operation state, otherwise, carries out next step；3rd step, the water pump come into operation at first is disabled, regulate the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；4th step, in three step process, if the water pump of converting operation reaches minimum speed, cooling water pressure remains above setting pressure, then carry out next step, otherwise, keep water pump operation state；5th step, the water pump that second puts into operation is disabled, regulate the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；6th step, improve the rotating speed of current converting operation water pump, until cooling water pressure reaches to set pressure；7th step, in six-step process, if the water pump of current converting operation reaches maximum (top) speed, cooling water pressure is still below setting pressure, then carry out next step, otherwise, keeps water pump operation state；8th step, the water pump of current converting operation is switched to power frequency state, the water pump that idle is put into converting operation state, until cooling water pressure reaches to set pressure；9th step, during the 8th step, if the water pump of current converting operation reaches maximum (top) speed, cooling water pressure is still below setting pressure, then carry out next step, otherwise, keeps water pump operation state；Tenth step, the water pump of current converting operation is switched to power frequency state, idle for residue water pump is put into converting operation state, until cooling water pressure reaches to set pressure；The step of described blower control method is as follows: if first step cooling water pump runs and cooling water send coolant-temperature gage to be higher than the start-up temperature that cooling tower sets, then starts blower fan, otherwise, carries out next step；Second step, blower fan are out of service.
The control method of industrial cooling circulating water system the most according to claim 3, it is characterized in that, in described running in water pump control method, if the most only separate unit water pump operation, when this water pump accumulated running time reaches to switch setting value, switch to next water pump operation.
The control method of industrial cooling circulating water system the most according to claim 4, it is characterised in that in described running in water pump control method, if overload or fault alarm occurs in certain water pump, this water pump is out of service, and residue water pump is run by above-mentioned steps.
The control method of industrial cooling circulating water system the most according to claim 5, it is characterised in that in described running in water pump control method, if cooling water water pushing pressure is less than the low pressure limit value set or higher than the upper pressure limit value set, system alarm.
7. according to the control method of the industrial cooling circulating water system described in claim 3 or 4 or 5 or 6, it is characterized in that, described blower control method replaces with following steps: if first step cooling water pump runs and cooling water send coolant-temperature gage to be higher than the start-up temperature that cooling tower sets, then carry out next step, otherwise, blower fan stops；Second step, startup blower fan；3rd step, variable frequency adjustment rotation speed of fan, keep cooling water temperature constant.
8. according to the control method of the industrial cooling circulating water system described in claim 3 or 4 or 5 or 6, it is characterized in that, described blower control method changes to following steps: if first step cooling aquametry temperature is equal to design temperature, then keep fan operation state, otherwise, next step is carried out；If second step cooling aquametry temperature is less than design temperature, then all blower fan is out of service, otherwise, carries out next step；3rd step, the temperature difference calculated between cooling water design temperature and cooling aquametry temperature；If the 4th step temperature difference is more than threshold values, then carries out the 4th step, otherwise, carry out the 5th step；4th step, all blower fans all put into operation, quickly reduce cooling water temperature；5th step, it is gradually lowered fan operation quantity, makes cooling water temperature be gradually lowered, and constant to design temperature.
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| CN106196799A (en) * | 2016-08-25 | 2016-12-07 | 浙江夏王纸业有限公司 | One utilizes public water delivery low-temperature receiver amount to replace production body paper thermal device |
| CN109893801A (en) * | 2017-12-08 | 2019-06-18 | 中国石油化工股份有限公司 | Cooling water recovery device and method |
| CN112197402A (en) * | 2020-10-14 | 2021-01-08 | 苏州合卓智能科技有限公司 | Group control system of heating and cooling source system |
| CN112486227A (en) * | 2020-10-28 | 2021-03-12 | 中广核(乌兰察布)风力发电有限公司 | Control system and method for automatic control of pressure of cooling water system |
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| CN109893801B (en) * | 2017-12-08 | 2023-10-20 | 中国石油化工股份有限公司 | Cooling water recovery device and method |
| CN112197402A (en) * | 2020-10-14 | 2021-01-08 | 苏州合卓智能科技有限公司 | Group control system of heating and cooling source system |
| CN112486227A (en) * | 2020-10-28 | 2021-03-12 | 中广核(乌兰察布)风力发电有限公司 | Control system and method for automatic control of pressure of cooling water system |
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