CN111043818A - Cooling water circulation control method and system - Google Patents
Cooling water circulation control method and system Download PDFInfo
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- CN111043818A CN111043818A CN201811184365.9A CN201811184365A CN111043818A CN 111043818 A CN111043818 A CN 111043818A CN 201811184365 A CN201811184365 A CN 201811184365A CN 111043818 A CN111043818 A CN 111043818A
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- 239000000498 cooling water Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 353
- 238000001816 cooling Methods 0.000 claims abstract description 56
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 239000002351 wastewater Substances 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 11
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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Abstract
The application provides a cooling water circulation control method and a cooling water circulation control system. The cooling water circulation system comprises a first water tank, a second water tank and a first circulating water pump which are sequentially connected through pipelines. And a first electromagnetic valve is arranged on a pipeline connecting the first water tank and the second water tank. The first water tank is provided with a first temperature detection device for detecting a first temperature value of circulating water in the first water tank. When the first temperature value is smaller than or equal to a first preset temperature value, the circulating water in the first water tank can directly return to water utilization equipment without passing through a cooling tower and a water chilling unit by opening the first electromagnetic valve. The first electromagnetic valve and the first temperature detection device are matched for use, so that the working loads of the cooling tower and the water chilling unit are reduced.
Description
Technical Field
The present disclosure relates to cooling circulation technologies, and in particular, to a cooling water circulation control method and system.
Background
In industrial plants such as semiconductor factories and data rooms, process equipment often generates heat during production and operation, which causes the water temperature in the production equipment to continuously rise. In order to ensure that the water in the production equipment reaches the environment required by production all the year round, a set of cooling system is required.
No matter whether the water temperature in the production equipment reaches the environment required by production or not, the existing cooling system needs to guide the water coming out of the production equipment into a cooling tower for primary cooling and then into a water chilling unit for secondary cooling. The cooling system does not comprehensively consider the influence of factors such as external environment and the like, does not fully utilize an outdoor natural cold source, and increases the working load of the water chilling unit.
Disclosure of Invention
Therefore, it is necessary to provide a cooling water circulation control method and system for solving the problem in the prior art that an outdoor natural cold source is not fully utilized.
A cooling water circulation control method. The cooling water circulation control method comprises the following steps:
detecting and judging whether a first temperature value of circulating water in a first water tank is less than or equal to a first preset temperature value, wherein the first preset temperature value is a working temperature value of the circulating water in water utilization equipment;
and when the first temperature value is detected and judged to be less than or equal to the first preset temperature value, controlling a first electromagnetic valve to be opened, and returning the circulating water in the first water tank to the water utilization equipment through a first circulating water pump.
In one embodiment, the method further comprises the following steps:
when the first temperature value is detected and judged to be greater than the first preset temperature value, detecting and judging whether the wet bulb temperature value is less than or equal to a second preset temperature value, wherein the second preset temperature value is less than the first preset temperature value;
when the outdoor wet bulb temperature value is detected and judged to be smaller than or equal to the second preset temperature value, the first electromagnetic valve is controlled to be closed, the second electromagnetic valve is controlled to be opened, so that the circulating water in the first water tank is introduced into a primary circulating system, after primary cooling treatment is carried out on the circulating water in the water using equipment, the third electromagnetic valve and the fourth electromagnetic valve are controlled to be opened, and the circulating water in the primary circulating system returns to the water using equipment through the first circulating water pump.
In one embodiment, the method further comprises the following steps:
when the outdoor wet bulb temperature value is greater than the second preset temperature value, the first electromagnetic valve is controlled to be closed, the second electromagnetic valve is controlled to be opened, so that circulating water in the first water tank is introduced into a primary circulating system, after primary cooling treatment is carried out on the circulating water in the water using equipment, the fourth electromagnetic valve is controlled to be closed, the third electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve are controlled to be opened, so that the circulating water in the primary circulating system is introduced into a secondary circulating system, after secondary cooling treatment is carried out on the circulating water flowing out of the primary circulating system, the fourth electromagnetic valve is controlled to be opened, and the circulating water in the secondary circulating system returns to the water using equipment through the first circulating water pump.
In one embodiment, the method further comprises the following steps:
detecting and judging whether the conductivity value of the circulating water in the second water tank is greater than a preset conductivity value or not;
and when detecting and judging whether the conductivity value of the circulating water in the second water tank is larger than a preset conductivity value or not, controlling a seventh electromagnetic valve and an eighth electromagnetic valve to be opened, draining water from the second water tank, and supplementing water to the first water tank.
In one embodiment, the method further comprises the following steps:
and controlling a ninth electromagnetic valve to be opened, and introducing the circulating water discharged from the second water tank into a wastewater recovery device so as to recycle the circulating water discharged from the second water tank.
A cooling water circulation system. The cooling water circulation system comprises a first water tank and a first water circulating pump which are sequentially connected through a pipeline. The cooling water circulation system further includes:
the first electromagnetic valve is arranged on a pipeline between the first water tank and the second water tank; and
the first temperature detection device is arranged in the first water tank and used for detecting whether the first temperature value of the circulating water in the first water tank is smaller than or equal to a first preset temperature value or not.
In one embodiment, the cooling water circulation system further includes:
the controller is electrically connected with the first electromagnetic valve and is used for controlling the opening and closing state of the first electromagnetic valve; and
and the second water tank is arranged between the first water tank and the first circulating water pump, and a pipeline between the first water tank and the second water tank is provided with the first electromagnetic valve.
In one embodiment, the cooling water circulation system further includes:
the seventh electromagnetic valve is arranged on a water replenishing pipeline of the first water tank, and water is replenished into the first water tank after the seventh electromagnetic valve is opened;
the eighth electromagnetic valve is arranged on a drainage pipeline of the second water tank, and when the eighth electromagnetic valve (28) is opened, the second water tank starts to drain water; and
and the conductivity detection device is arranged in the second water tank and is used for detecting the conductivity of the process water circulation system.
In one embodiment, the cooling water circulation system further includes:
and the wastewater recovery device is connected with the first circulating water pump through a pipeline.
In one embodiment, the cooling water circulation system further includes:
the first-stage circulating system is connected with the first water tank through a pipeline and used for cooling circulating water entering the first-stage circulating system; and
and the secondary circulating system is connected with the primary circulating system through a pipeline.
Drawings
FIG. 1 is a flow chart of a cooling water circulation control method provided in an embodiment of the present application;
FIG. 2 is a flow chart of a cooling water circulation control method provided in another embodiment of the present application;
FIG. 3 is a flow chart of a cooling water circulation control method provided in yet another embodiment of the present application;
FIG. 4 is a schematic view of a cooling water circulation system provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a cooling water circulation system provided in another embodiment of the present application.
Description of the main element reference numerals
Process water circulation system 100
Fourth solenoid valve 24
Ninth electromagnetic valve 29
First temperature detecting device 31
Second temperature detecting device 32
Third temperature detecting device 33
Fourth temperature detecting device 34
Waste water recovery device 50
Water-using equipment 60
The first water tank 210
The second water tank 220
First circulating water pump 230
Second circulating water pump 310
First water inlet 321
First water outlet 322
Two-stage circulation system 400
Third circulating water pump 420
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the cooling water circulation control method and system of the present application are further described in detail by embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, an embodiment of the present application provides a cooling water circulation control method. The cooling water circulation control method comprises the following steps:
s100, detecting and judging whether a first temperature value of circulating water in the first water tank 210 is smaller than or equal to a first preset temperature value, wherein the first preset temperature value is a temperature value suitable for the water utilization equipment 60 to work.
In step S100, the water in the water using device 60 flows into the first water tank 210, and the temperature is naturally reduced by the movement of the circulating water. A first temperature value of the circulating water in the first water tank 210 is detected by the first temperature detecting means 31. And the controller 10 such as a single chip microcomputer and a microprocessor judges whether the first temperature value is smaller than the first preset temperature value. The first preset temperature value may be arbitrarily set by those skilled in the art. For example, the first preset temperature value may be 22 ℃.
S200, when it is detected and determined that the first temperature value is less than or equal to the first preset temperature value, controlling the first electromagnetic valve 21 to open, and returning the circulating water in the first water tank 210 to the water using equipment 60 through the first circulating water pump 230.
In step S200, the controller 10 may control the open/close state of the first electromagnetic valve. For example, the first preset temperature value is 22 ℃, and the first temperature value detected by the first temperature detecting device 31 is 20 ℃. The single chip microcomputer can control the first electromagnetic valve to be opened. At this time, a path between the first water tank 210 and the first circulating water pump 230 is opened, and the circulating water in the first water tank 210 is returned to the water using device 60 through the first circulating water pump 230. Of course, the circulating water in the first water tank 210 may also flow into the second water tank 220. And then returns to the water using equipment 60 through the first circulating water pump 230 connected with the second water tank 220 to continue to be used by the water using equipment 60.
In this embodiment, the controller 10 controls the open/close state of the first electromagnetic valve 21 according to the determination result. When the first temperature value is less than or equal to the first preset temperature value, the controller 10 controls the first electromagnetic valve 21 to open. At this time, a path between the first water tank 210 and the first circulating water pump 230 is opened. The circulating water in the first water tank 210 may flow back to the water-using device 60 through the first circulating water pump 230 without being cooled by the primary circulating system 300 and the secondary circulating system 400. The cooling water circulation control method reduces the workload of the primary circulation system 300 and the secondary circulation system 400 by controlling the open/close state of the first electromagnetic valve 21.
Referring to fig. 2, in one embodiment, the method further includes:
s300, when the first temperature value is detected and judged to be larger than the first preset temperature value, whether the outdoor wet bulb temperature value is smaller than or equal to a second preset temperature value or not is detected and judged, and the second preset temperature value is an outdoor temperature value which can be cooled by utilizing the primary circulating system 300.
In step S300, when the controller 10 determines that the first temperature value is greater than the first preset temperature value. That is, the temperature of the circulating water in the first water tank 210 cannot be lowered to a temperature suitable for the operation of the water using equipment 60 by a natural cooling mode of the movement of the circulating water. At this time, the outdoor wet bulb temperature value may be detected by the second temperature detecting device 32. The second temperature detection device 32 may be a temperature sensor disposed outdoors. The controller 10 determines whether the wet bulb temperature value is less than or equal to a second preset temperature value. The wet bulb temperature represents the lowest temperature that the circulating water can reach by evaporation at a certain point and at a certain time. For purposes of this application, the wet bulb temperature represents the lowest temperature to which the circulating water may be cooled in the primary cooling system 300. The lower the wet bulb temperature value, the better the natural heat sink for cooling. The second preset temperature value may be set according to the circulating water temperature required by the operation of the water using equipment 60. The second preset temperature value needs to be suitably lower than the water temperature required for the operation of the water using device 60. For example, the water temperature of the circulation water required by the operation of the water using device 60 is 22 ℃, and the second preset temperature value may be set to 20 ℃.
S400, when the outdoor wet bulb temperature value is smaller than or equal to the second preset temperature value, controlling the first electromagnetic valve 21 to be closed, and controlling the second electromagnetic valve 22 to be opened. So that the circulating water in the first water tank 210 is introduced into the primary circulating system 300. And after the circulating water in the water using equipment is subjected to primary cooling treatment, controlling the third electromagnetic valve 23 and the fourth electromagnetic valve 24 to be opened. The circulating water in the primary circulating system 300 is returned to the water-using equipment 60 through the first circulating water pump 230.
In step S400, when the outdoor wet bulb temperature value is less than or equal to the second preset temperature value. It can be stated that the water temperature of the water using device 60 can be reduced by the primary circulation system 300 using a natural cold source. The primary circulation system 300 may be provided with a third temperature detection device 33 for detecting a third temperature value of the circulating water after the primary circulation system 300 operates for a period of time. When the third temperature value is less than or equal to the first preset temperature value, the controller 10 controls the third electromagnetic valve 23 and the fourth electromagnetic valve 24 to open, and the circulating water in the primary circulating system 300 returns to the water-using device 60 through the first circulating water pump 230. When the third temperature value is greater than the first preset temperature value, the primary circulation system 300 continues to utilize a natural cooling source to cool the circulation water in the water-using equipment 60. Until the controller 10 determines that the third temperature value is less than or equal to the first preset temperature value. The controller 10 controls the third solenoid valve 23 and the fourth solenoid valve 24 to open, and the circulating water in the primary circulating system 300 returns to the water using device 60 through the first circulating water pump 230.
In this embodiment, the controller 10 determines whether the outdoor wet bulb temperature value is less than or equal to the second preset temperature value. The controller 10 controls the open/close states of the first solenoid valve 21 and the second solenoid valve 22 according to the determination result. When the wet bulb temperature value is less than or equal to the second preset temperature value, the controller 10 controls the first electromagnetic valve 21 to be closed and controls the second electromagnetic valve 22 to be opened. So as to realize the purpose of performing primary cooling on the circulating water from the water using equipment 60 by using the primary circulating system 300 and a natural cooling source. The cooling water circulation control method fully utilizes natural cold sources to cool the circulating water from the water using equipment 60 by controlling the opening and closing states of the first electromagnetic valve 21 and the second electromagnetic valve 22, reduces the working load of the secondary circulation system 400, and improves the energy efficiency of the secondary circulation system 400.
In one embodiment, the method further comprises the following steps:
s500, when the outdoor wet bulb temperature value is larger than the second preset temperature value, the first electromagnetic valve 21 is controlled to be closed, and the second electromagnetic valve 22 is controlled to be opened. So that the circulating water in the first water tank 210 is introduced into the primary circulating system 300. After the first-stage cooling treatment is performed on the circulating water in the water using equipment 60, the fourth electromagnetic valve 24 is controlled to be closed, and the third electromagnetic valve 23, the fifth electromagnetic valve 25 and the sixth electromagnetic valve 26 are opened. To introduce the circulating water in the primary circulating system 300 into the secondary circulating system 400. After the second-stage cooling treatment is performed on the circulating water flowing out of the first-stage circulating system 300, the fourth electromagnetic valve 24 is controlled to be opened, and the circulating water in the second-stage circulating system 400 returns to the water-using equipment 60 through the first circulating water pump 230.
The outdoor wet bulb temperature value is greater than the second preset temperature value. It can be stated that the circulating water flowing out of the water consuming device 60 cannot be cooled to a temperature suitable for the continued operation of the water consuming device 60 by only one-stage cooling. For example, the temperature value suitable for the continuous operation of the water utilization equipment 60 is 22 ℃, the temperature value of the circulating water flowing out of the water utilization equipment 60 is 35 ℃, and the temperature of the circulating water flowing out of the water utilization equipment 60 is reduced to 30 ℃ after being cooled by the primary circulating system 300. At this time, the controller 10 controls the fourth solenoid valve 24 to be closed, and the third, fifth, and sixth solenoid valves 23, 25, and 26 to be opened. Introducing the circulating water in the primary circulating system 300 into a secondary circulating system 400, and performing secondary cooling on the circulating water entering the secondary circulating system 400 in a reverse Carnot circulating mode formed by the secondary circulating system 400. A fourth temperature sensing device 34 may be disposed in the two-stage circulation system 400. The fourth temperature detecting device detects a fourth temperature value of the circulating water after the secondary circulating system 400 operates for a period of time. When the fourth temperature value is less than or equal to a first preset temperature value, the controller 10 controls the fourth electromagnetic valve 24 to open. The circulating water in the secondary circulating system 400 is returned to the water using apparatus 60 through the first circulating water pump 230.
In this embodiment, when the wet bulb temperature value is greater than the second preset temperature value, the effect of cooling the natural energy is reduced. After the primary circulation system 300 is subjected to primary cooling treatment, the circulating water flowing out of the water utilization equipment 60 is cooled to a certain temperature value, and then the secondary circulation system 400 is utilized for secondary cooling. The primary cycle 300 utilizes a natural cooling source for cooling, as opposed to the secondary cycle 400 for cooling. The first-stage circulation system 300 has low power consumption, shares the work load of the second-stage circulation system 400, and reduces the power consumption of the second-stage circulation system 400, thereby reducing the operation cost of the refrigeration equipment.
Referring to fig. 3, in one embodiment, the method further includes:
s600, detecting whether the conductivity value of the circulating water in the second water tank 220 is larger than a preset conductivity value.
Since the conductivity value in the cooling water circulation system 100 is too high, scale inhibition, corrosion, and the like of the pipe or the equipment may be caused. Therefore, a conductivity detection means 40 may be provided on the second water tank. The conductivity detection means 40 detects the conductivity value of the circulating water in the second water tank 220. The controller 10 determines whether the conductivity value is greater than a preset conductivity value. The preset conductivity value may be arbitrarily set by those skilled in the art.
S700, when the conductivity value of the circulating water in the second water tank 220 is greater than the preset conductivity value, controlling the seventh electromagnetic valve 27 and the eighth electromagnetic valve 28 to open, replenishing water to the first water tank 210, and draining water to the second water tank 220.
In step S700, the seventh electromagnetic valve 27 is a water replenishing valve disposed on the water replenishing pipeline of the first water tank 210. The eighth solenoid valve 28 is a drain valve disposed on a drain line of the second tank 220. When the conductivity value is greater than the preset conductivity value, the controller 10 controls the seventh electromagnetic valve 27 to open, the first water tank 210 starts to replenish water, and the second water tank 220 starts to drain water.
In this embodiment, the controller 10 may control the open/close states of the seventh solenoid valve 27 and the eighth solenoid valve 28 according to the determination result. Thereby ensuring that the conductivity value of the circulating water in the cooling water circulation system 100 is within a safe range. The cooling water circulation control method avoids scale inhibition, corrosion and the like of pipelines or equipment cooling equipment of the cooling water circulation system 100 by controlling the water supplement of the first water tank 210 and the water drainage of the second water tank 220, improves the heat exchange efficiency of the equipment, prolongs the service life and reduces the operation and maintenance cost.
In one embodiment, the method further comprises the following steps:
and S800, controlling the ninth electromagnetic valve 29 to be opened, and introducing the circulating water discharged from the second water tank 220 into a wastewater recovery device 50 so as to recover and reuse the circulating water discharged from the second water tank 220.
The wastewater recovery device 50 is connected with the first circulating water pump 230 through a pipeline. The ninth electromagnetic valve 29 is disposed on a pipe between the wastewater recovery device 50 and the first circulating water pump 230. When the controller 10 controls the seventh solenoid valve 27 and the ninth solenoid valve 29 to be opened, and the second water tank 220 starts to discharge water, the discharged circulating water flows into the wastewater reclamation apparatus 50 through the first circulating water pump 230. The waste water recovery device 50 may be connected to a greening pipe or a flushing pipe of a toilet, and used for greening vegetation or using water in the toilet.
In this embodiment, the cooling water circulation control method controls the circulating water discharged from the second water tank 220 to flow into the wastewater recovery device 50. The waste water recovery device 50 may be connected to a greening pipe or a flushing pipe of a toilet, and used for greening vegetation or using water in the toilet. The cooling water circulation control method reduces the waste of water resources and reduces the cost expenditure of enterprises.
Referring to fig. 4, an embodiment of the present application provides a cooling water circulation system 100. The cooling water circulation system 100 includes a first water tank 210 and a first circulation water pump 230 which are sequentially connected by a pipe. The cooling water circulation system 100 further includes a first electromagnetic valve 21 and a first temperature detection device 31.
The water inlet of the first water tank 210 is connected with the water outlet of the water using equipment 60 through a pipeline.
The first electromagnetic valve 21 is disposed in a pipe between the water outlet of the first water tank 210 and the first circulating water pump 230. When the first solenoid valve 21 is opened, the circulating water in the first water tank 210 may be returned to the water using device 60 through the first circulating water pump 230.
The first temperature detection device 31 is disposed in the first water tank 210, and is configured to detect a first temperature value of circulating water in the first water tank 210. The first temperature detection means 31 may be a temperature sensor.
In this embodiment, the cooling water circulation system 100 includes a first water tank 210 and a first water circulation pump 230 sequentially connected by a pipe. A first electromagnetic valve 21 is arranged on a pipeline connecting the first water tank 210 and the first circulating water pump 230. The first water tank 210 is provided with a first temperature detection device 31 for detecting a first temperature value of circulating water in the first water tank 210. When the first temperature value is less than or equal to the first preset temperature value, the first electromagnetic valve 21 may be opened to allow the circulating water in the first water tank 210 to directly return to the water using equipment 60 without passing through the cooling tower 320 and the water chilling unit 430. The first electromagnetic valve 21 and the first temperature detecting device 31 are used together to reduce the workload of the cooling tower 320 and the water chilling unit 430.
Referring to fig. 5, in one embodiment, the cooling water circulation system 100 further includes a controller 10 and a second water tank 2020. The controller 10 is electrically connected to the first electromagnetic valve 21, and is configured to control an opening/closing state of the first electromagnetic valve 21. The second water tank 220 is disposed between the first water tank 210 and the first circulating water pump 230, and the first electromagnetic valve 21 is disposed in a pipe between the first water tank 210 and the second water tank 220.
The controller 10 may be a single chip microcomputer or a microprocessor. The controller 10 is in communication connection with the first temperature detecting device 31, and is configured to obtain the first temperature value detected by the first temperature detecting device 31. In addition, the controller 10 may be communicatively coupled to a touch screen. The current working personnel can set the first preset temperature value and the second preset temperature value at will through the touch screen. The controller 10 may obtain the first preset value and compare with the first temperature value.
In this embodiment, the cooling water circulation system 100 automatically controls the open/close state of the first electromagnetic valve 21 through the controller 10, so as to control the cooling mode of the circulating water in the water using equipment 60.
In one embodiment, the cooling water circulation system 100 further includes a primary circulation system 300 and a secondary circulation system 400.
The primary circulation system 300 includes a second circulation water pump 310 and a cooling tower 320. The second circulation water pump 310 is connected to the first water tank 210 through a pipe. The second electromagnetic valve 22 is provided in a pipe between the second circulating water pump 310 and the first water tank 210. The second solenoid valve 22 is electrically connected to the controller 10. The cooling tower 320 has a first water inlet 321 and a first water outlet 322. The first water inlet 321 is connected with the second circulating water pump 310 through a pipeline, and the first water outlet 322 is connected with the second-stage circulating system 400 through a pipeline. The third electromagnetic valve 23 is disposed in a pipeline between the first water outlet 322 and the secondary circulation system 400. The third solenoid valve 23 is electrically connected to the controller 10. The cooling tower 320 may further be provided with a third temperature detection device 33. The third temperature detecting device 33 is configured to detect a third temperature value in the cooling tower 320 after the primary circulation system 300 operates for a period of time.
The cooling tower 320 includes multiple sets of spray pumps and multiple sets of fans. When the controller 10 controls the second electromagnetic valve to open, the second circulating water pump 310 provides power to introduce the circulating water in the first water tank 210 into the pipeline of the cooling tower 320. And the spray pump sprays cold water to a pipeline filled with circulating water needing refrigeration. And the fan blows air to the pipeline filled with circulating water needing refrigeration. The spray pump and the fan are matched for use, and the purpose of physical cooling is achieved by utilizing a natural cold source. The third temperature detecting device 33 detects a third temperature value of the cooling tower in real time. The current working personnel can also set a third preset temperature value on the touch screen. The third preset temperature value is a temperature value that can enter the secondary circulation system 400. And when the wet bulb temperature value is less than or equal to the second preset temperature value. At which point the secondary circulation system 400 ceases operation. And only when the third temperature value is less than or equal to a first preset temperature value, the spray pump and the fan stop working. At this time, the circulating water in the cooling tower 320 is returned to the water using facility through the first circulating water pump 230. And when the wet bulb temperature value is greater than the second preset temperature value. And only when the third temperature value is less than or equal to a third preset temperature value, the spray pump and the fan stop working. At this time, the circulating water in the cooling tower 320 enters the secondary circulating system 400 to perform a secondary cooling process.
The secondary circulation system 400 includes a heat exchanger 410, a third circulation water pump 420, and a chiller 430.
The heat exchanger 410 is connected to the first water outlet 322 through a pipe. The third electromagnetic valve 23 is arranged on the pipeline between the heat exchanger 410 and the first water outlet 322. The third solenoid valve 23 is electrically connected to the controller 10. The heat exchanger 410 is connected to the second water tank 220 through a pipe. The fourth solenoid valve 24 is arranged on a pipeline between the heat exchanger 410 and the second water tank 220. The fourth solenoid valve 24 is electrically connected to the controller 10.
The third circulating water pump 420 is connected to the heat exchanger 410 through a pipe. The fifth electromagnetic valve 25 is arranged on a pipeline between the third circulating water pump 420 and the heat exchanger 410. The fifth solenoid valve 25 is electrically connected to the controller 10.
The water chilling unit 430 is respectively connected with the heat exchanger 410 and the third circulating water pump 420 through pipes. The sixth electromagnetic valve 26 is arranged on a pipeline between the water chilling unit 430 and the heat exchanger 410. The sixth solenoid valve 26 is electrically connected to the controller 10. The water chilling unit 430 may further include a fourth temperature detection device 34. The fourth temperature detecting device 34 is configured to detect a fourth temperature value in the water chilling unit 430 in real time. The fourth temperature detection device 34 is in communication with the controller 10.
When the controller 10 controls the second electromagnetic valve 22 to open, the primary circulation system 300 may perform a primary cooling process on the circulation water entering the primary circulation system 300 by using a natural cold source. When the controller 10 controls the third solenoid valve 23 and the fourth solenoid valve 24 to be opened, the circulating water in the cooling tower 320 enters the second water tank 220 through the heat exchanger 410. And then returns to the water using device 60 through the first circulating water pump 230. When the controller 10 controls the fourth solenoid valve 24 to be closed, the third solenoid valve 23, the fifth solenoid valve 25, and the sixth solenoid valve 26 are opened. The circulating water in the primary circulating system 300 flows into the secondary cooling system 400. The secondary cooling system 400 performs secondary cooling on the circulating water entering the secondary circulating system 400 by using reverse carnot circulation. When the fourth temperature value is less than or equal to the first preset value, the secondary circulation system 400 stops working. The controller 10 controls the fourth electromagnetic valve 24 to open, and the circulating water in the secondary circulating system 400 enters the second water tank 220 and returns to the water-using equipment through the first circulating water pump 230. Otherwise, the secondary circulation system 400 continues to work until the controller 10 determines that the fourth temperature value is less than or equal to the first preset value.
In this embodiment, the cooling water circulation system 100 is used by combining the primary circulation system 300 and the secondary circulation system 400. The cooling water circulation system 100 makes full use of natural cooling source to cool the circulating water from the water using equipment 60, thereby reducing the workload of the secondary circulation system 400 and improving the energy efficiency of the secondary circulation system 400.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A cooling water circulation control method, characterized by comprising:
detecting and judging whether a first temperature value of water in a first water tank (210) is less than or equal to a first preset temperature value, wherein the first preset temperature value is a working temperature value of circulating water in water utilization equipment (60);
when the first temperature value is detected and judged to be smaller than or equal to the first preset temperature value, a first electromagnetic valve (21) is controlled to be opened, and circulating water in the first water tank (210) returns to the water utilization equipment (60) through a first circulating water pump (230).
2. The cooling water circulation control method according to claim 1, further comprising:
when the first temperature value is detected and judged to be greater than the first preset temperature value, detecting and judging whether the outdoor wet bulb temperature value is less than or equal to a second preset temperature value, wherein the second preset temperature value is less than the first preset value;
when the outdoor wet bulb temperature value is smaller than or equal to the second preset temperature value through detection and judgment, the first electromagnetic valve (21) is controlled to be closed, the second electromagnetic valve (22) is opened to introduce circulating water in the first water tank (210) into a primary circulating system (300), after primary cooling treatment is carried out on the circulating water in the water using equipment (60), the third electromagnetic valve (23) and the fourth electromagnetic valve (24) are controlled to be opened, and the circulating water in the primary circulating system (300) returns to the water using equipment (60) through the first circulating water pump (230).
3. The cooling water circulation control method according to claim 2, further comprising:
when the detected and judged outdoor wet bulb temperature value is greater than the second preset temperature value, the first electromagnetic valve (21) is controlled to be closed, the second electromagnetic valve (22) is controlled to be opened, so as to introduce the circulating water in the first water tank (210) into a primary circulating system (300), after the first-stage cooling treatment is carried out on the circulating water in the water utilization equipment (60), the fourth electromagnetic valve (24) is controlled to be closed, the third electromagnetic valve (23), the fifth electromagnetic valve (25) and the sixth electromagnetic valve (26) are opened, to introduce the circulating water of the primary circulating system (300) into a secondary circulating system (400), after the circulating water flowing out of the primary circulating system (300) is subjected to secondary cooling treatment, the fourth electromagnetic valve (24) is controlled to be opened, circulating water in the secondary circulating system (400) returns to the water using equipment (60) through the first circulating water pump (230).
4. The cooling water circulation control method according to any one of claims 1 to 3, further comprising:
detecting and judging whether the conductivity value of the circulating water in the second water tank (220) is greater than a preset conductivity value or not;
and when detecting and judging whether the conductivity value of the circulating water in the second water tank (220) is larger than a preset conductivity value or not, controlling a seventh electromagnetic valve (27) and an eighth electromagnetic valve (28) to be opened, draining the second water tank (220), and supplementing water to the first water tank (210).
5. The cooling water circulation control method according to claim 4, further comprising:
and controlling a ninth electromagnetic valve (29) to be opened, and introducing the circulating water discharged from the second water tank (220) into a wastewater recovery device (50) so as to recycle the circulating water discharged from the second water tank (220).
6. A cooling water circulation system (100) comprising a first water tank (210) and a first circulating water pump (230) which are connected in sequence by a pipe, characterized in that the cooling water circulation system (100) further comprises:
a first electromagnetic valve (21) arranged on a pipeline between the first water tank (210) and the first circulating water pump (230); and
the first temperature detection device (31) is arranged in the first water tank (210) and used for detecting a first temperature value of circulating water in the first water tank (210).
7. The cooling water circulation system (100) of claim 6, further comprising:
the controller (10) is electrically connected with the first electromagnetic valve (21) and is used for controlling the opening and closing state of the first electromagnetic valve (21); and
and a second water tank (220) disposed between the first water tank (210) and the first circulating water pump (230), wherein the first electromagnetic valve (21) is disposed in a pipe between the first water tank (210) and the second water tank (220).
8. The cooling water circulation system (100) of claim 7, further comprising:
the seventh electromagnetic valve (27) is arranged on a water replenishing pipeline of the first water tank (210), and water is replenished into the first water tank (210) after the seventh electromagnetic valve (27) is opened;
the eighth electromagnetic valve (28) is arranged at a drainage pipeline of the second water tank (220), and when the eighth electromagnetic valve (28) is opened, the second water tank (220) starts to drain water; and
and the conductivity detection device (40) is arranged in the second water tank (220) and is used for detecting the conductivity of circulating water in the cooling water circulating system (100).
9. The cooling water circulation system (100) of claim 8, further comprising:
and the waste water recovery device (50) is connected with the first circulating water pump (230) through a pipeline.
10. The cooling water circulation system (100) of claim 6, further comprising:
the primary circulating system (300) is connected with the first water tank (210) through a pipeline and is used for cooling circulating water entering the primary circulating system (300); and
and the secondary circulating system (400) is connected with the primary circulating system (300) through a pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184365.9A CN111043818A (en) | 2018-10-11 | 2018-10-11 | Cooling water circulation control method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811184365.9A CN111043818A (en) | 2018-10-11 | 2018-10-11 | Cooling water circulation control method and system |
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| CN111043818A true CN111043818A (en) | 2020-04-21 |
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| CN201811184365.9A Pending CN111043818A (en) | 2018-10-11 | 2018-10-11 | Cooling water circulation control method and system |
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