CN209655821U - A kind of circulating water cooling system - Google Patents
A kind of circulating water cooling system Download PDFInfo
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- CN209655821U CN209655821U CN201821804367.9U CN201821804367U CN209655821U CN 209655821 U CN209655821 U CN 209655821U CN 201821804367 U CN201821804367 U CN 201821804367U CN 209655821 U CN209655821 U CN 209655821U
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Abstract
The utility model provides a kind of circulating water cooling system, the circulating water cooling system includes multiple cooling towers, the multiple cooling tower includes first group of cooling tower and remaining cooling tower, remaining described cooling tower is equipped with multiple blowers and multiple motor-driven valves, first group of cooling tower is provided only with first group of blower, and the water outlet of first group of cooling tower is kept it turned on；The circulating water cooling system autocontrol method includes the starting number that electric temperature control valve controls multiple blowers according to its internal cooling water temperature automatic adjustment cooling water flow, to frequency converter progress constant difference PID control or constant-pressure drop PID control, according to the cooling water temperature of the common end of the water outlet of the multiple cooling tower.The utility model can effectively save hydroelectric resources, reduce production cost.
Description
Technical field
The utility model belongs to steel cord production field, and in particular to a kind of circulating water cooling system.
Background technique
Circulation is the important component of steel cord production master operation plating and water tank process.Wherein, it recycles
Water system supplies the cooling of intermediate-frequency heating furnace, main cooling intermediate frequency furnace loading coil, and cooling water temperature requires to be less than or equal to 35 DEG C.
Recirculated water cool down using cooling tower and the recirculated water in intermediate frequency furnace is cooled down by plate heat exchanger, makes intermediate frequency furnace water temperature not
More than 35 DEG C.Existing circulating water cooling system has the following disadvantages:
One, cooling column water temperature is manually adjusted according to wet-bulb temperature, does not join with the temperature requirement of workshop drainage facility
Move up the automatic control for doing closed loop；
Two, the type of cooling that system uses cooling tower to combine with plate heat exchanger, cooling column water temperature is by ambient wet bulb temperature
Degree influence is very big, and when environment temperature decline, cooling water temperature can also decline, since plate heat exchanger heat exchange amount is steady state value,
And use electric temperature control valve and control, electric temperature control valve will voluntarily reduce cooling water flow when the cooling water temperature decreases；Stream
Amount is reduced, original cooling towers and circulating pump for 28 DEG C of summer wet-bulb temperature selections will emergent power and cooling capacity it is excessive
Phenomenon causes the waste of hydroelectric resources；
Three, existing circulating water pipeline and plate heat exchanger design are less than normal, and summer, autumn cooling water temperature often have overheating problem,
After there is overtemperature, needs to increase pure water to carry out neutralization cooling, increase the consumption of pure water；Or air-conditioning is opened by workshop
Cooling system cools down to water tank box indirect, causes the waste of electric power resource.
Utility model content
The purpose of this utility model is to provide a kind of circulating water cooling systems, carry out oneself of closed loop to cooling water temperature
Dynamic control, effectively save hydroelectric resources.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of circulating water cooling system, including circulating water unit and control transmission unit, the circulating water list
Member include multiple cooling towers in parallel, multiple plate heat exchangers in parallel, multiple circulating pumps in parallel, cooling water pipeline,
The common end of the water outlet of the multiple cooling tower is arranged in recirculated water water return pipeline and frequency converter, the cooling water pipeline
Between the common end of the water inlet of the multiple plate heat exchanger, the recirculated water water return pipeline is arranged in the multiple cooling
Between the common end of the water outlet of the common end of the water inlet of tower and the multiple plate heat exchanger, the multiple circulating pump setting
On the cooling water supply pipe road, for adjusting the flow of cooling water in the cooling water pipeline, the frequency converter is used
In the revolving speed for adjusting the multiple circulating pump；The control transmission unit includes programmable logic controller (PLC), wet-bulb temperature sensing
Device, first group of temperature, pressure transmitter and second group of temperature, pressure transmitter, the wet bulb temperature sensor, first group of temperature
Pressure transmitter, second group of temperature, pressure transmitter is spent to be electrically connected with the programmable logic controller (PLC) respectively, it is described
Frequency converter is also electrically connected with the programmable logic controller (PLC), and the wet bulb temperature sensor is for acquiring the multiple cooling
The temperature of the cooling water of the common end of the water outlet of tower, first group of temperature, pressure transmitter are the multiple board-like for acquiring
The temperature and pressure of the cooling water of the common end of the water inlet of heat exchanger, second group of temperature, pressure transmitter is for acquiring institute
State the temperature and pressure of the recirculated water of the common end of the water outlet of multiple plate heat exchangers.
The multiple cooling tower includes first group of cooling tower and remaining cooling tower in addition to first group of cooling tower, institute
It states remaining cooling tower and is respectively arranged with multiple blowers and multiple motor-driven valves, the multiple blower and multiple motor-driven valves correspond,
Each motor-driven valve is correspondingly opened or closed in corresponding blower start and stop, and first group of cooling tower is correspondingly arranged on first group
Blower, the water outlet of first group of cooling tower remain open state, the multiple blower, first group of blower difference
It is electrically connected with the programmable logic controller (PLC).
Wherein, it is respectively equipped with electric temperature control valve on the multiple plate heat exchanger, for the multiple board-like according to flowing into
The flow of its internal cooling water of the temperature adjust automatically of the cooling water of heat exchanger, when the cooling for flowing into the multiple plate heat exchanger
When coolant-temperature gage is higher than temperature upper limit, increase cooling water flow, when the cooling water temperature for flowing into the multiple plate heat exchanger is low
When temperature upper limit value, reduce cooling water flow；
The programmable logic controller (PLC) be used to calculate the temperature of first group of temperature, pressure transmitter acquisition with it is described
Temperature difference between the temperature of second group of temperature, pressure transmitter acquisition, and according to the temperature difference compared with preset temperature difference
As a result constant difference PID control is carried out to the output frequency of the frequency converter, to adjust the cooling water of the multiple circulating pump output
Flow；Alternatively, the programmable logic controller (PLC) is used to calculate pressure and the institute of first group of temperature, pressure transmitter acquisition
The pressure difference between the pressure of second group of temperature, pressure transmitter acquisition is stated, and according to the ratio of the pressure difference and preset pressure difference
Relatively result carries out constant-pressure drop PID control to the output frequency of the frequency converter, to adjust the cooling of the multiple circulating pump output
Water flow；
The temperature that the programmable logic controller (PLC) is also used to acquire the wet bulb temperature sensor and the first default temperature
Degree is compared, and when the temperature of wet bulb temperature sensor acquisition is greater than first preset temperature, is controlled the multiple
Blower and first group of blower all start, and open corresponding multiple motor-driven valves；It is acquired in the wet bulb temperature sensor
Temperature be less than first preset temperature when, when the wet bulb temperature sensor acquisition temperature the first temperature difference of every decline,
The programmable logic controller (PLC) just stops the Fans in the multiple blower, and closes corresponding motor-driven valve, when
The temperature of the wet bulb temperature sensor acquisition is every to rise first temperature difference, and the programmable logic controller (PLC) just will be described
A Fans in multiple blowers in halted state are again started up, and open the corresponding motor-driven valve；
Preferably, the common end of the water inlet of the common end of the water outlet of the multiple cooling tower and the multiple circulating pump
Between cooling water supply pipe road be additionally provided with electronic scale remover, for the common end to the water outlet from the multiple cooling tower
The cooling water of outflow carries out scale removal.
Preferably, the programmable logic controller (PLC) is also connected with operator control panel, and the operator control panel is for switching to the frequency conversion
The constant difference PID control or constant-pressure drop PID control that device carries out.
Preferably, the operator control panel is also used to preset the temperature upper limit, temperature upper limit value, described default
Temperature difference, the preset pressure be poor, first preset temperature and first temperature difference.
Preferably, the programmable logic controller (PLC) is also connected with power cabinet, and the power cabinet is used for the recirculated water cooling
But system provides power supply.
Compared with prior art, the utility model has the beneficial effects that the circulating water cooling system it is the multiple
Electric temperature control valve on plate heat exchanger is according to the cooling water temperature adjust automatically cooling water flow flowed through, the programmable logic
Controller is poor according to the cooling water temperature of the common end of the water inlet of the multiple plate heat exchanger and water outlet common end
Constant difference PID control carried out to the output frequency of frequency converter, or according to the public of the water inlet of the multiple plate heat exchanger
The cooling water pressure difference of end and water outlet common end carries out constant-pressure drop PID control to the output frequency of frequency converter, also according to
The cooling water temperature of the common end of the water outlet of the multiple cooling tower controls the starting number of the multiple blower, can be effective
Meet production needs, save hydroelectric resources, reduces production cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the circulating water cooling system of an embodiment of the utility model；
Fig. 2 is constant difference PID control in the autocontrol method of the circulating water cooling system of an embodiment of the utility model
The block diagram of system；
Fig. 3 is constant-pressure drop PID control in the autocontrol method of the circulating water cooling system of an embodiment of the utility model
The block diagram of system；
Fig. 4 is blower start-up and shut-down control in the autocontrol method of the circulating water cooling system of an embodiment of the utility model
Logic chart.
Specific embodiment
To make to have further understanding to the purpose of this utility model, construction, feature and its function, hereby cooperate embodiment
Detailed description are as follows.
Referring to Figure 1, Fig. 1 is the structural schematic diagram of the circulating water cooling system of an embodiment of the utility model.This reality
A kind of circulating water cooling system with a novel embodiment includes circulating water unit 100 and control transmission unit 200, circulation
Water cooling unit 100 includes multiple cooling towers 11 in parallel, multiple plate heat exchangers 12 in parallel, multiple circulating pumps in parallel
13, cooling water pipeline 14, recirculated water water return pipeline 15 and frequency converter 16, cooling water pipeline 14 are arranged in multiple coolings
Between the common end 121 of the water inlet of the common end 112 and multiple plate heat exchangers 12 of the water outlet of tower 11, recirculated water return pipe
The common end of the common end 111 of the water inlet of multiple cooling towers 11 and the water outlet of multiple plate heat exchangers 12 is arranged in road 15
Between 122, multiple circulating pumps 13 are arranged on cooling water pipeline 14, cooling in cooling water pipeline 14 for adjusting
The flow of water, between the common end 112 of the water outlet of the common end 131 and multiple cooling towers 11 of the water inlet of multiple circulating pumps 13
It is connected with cooling water pipeline 14, the common end 132 of water outlet and the entering for multiple plate heat exchangers 12 of multiple circulating pumps 13
Cooling water pipeline 14 is connected between the common end 121 at the mouth of a river, frequency converter 16 is used to adjust the revolving speed of multiple circulating pumps 13；
Controlling transmission unit 200 includes 22, first groups of programmable logic controller (PLC) 21, wet bulb temperature sensor temperature, pressure transmitters 23
With second group of temperature, pressure transmitter 24,22, first groups of wet bulb temperature sensor, 23, second groups of temperature, pressure transmitter temperature pressure
Power transmitter 24 is electrically connected with programmable logic controller (PLC) 21 respectively, and frequency converter 16 is also electrical with programmable logic controller (PLC) 21
Connection, wet bulb temperature sensor 22 are used to acquire the temperature of the cooling water of the common end 112 of the water outlet of multiple cooling towers 11, the
One group of temperature, pressure transmitter 23 is used to acquire the temperature of the cooling water of the common end 121 of the water inlet of multiple plate heat exchangers 12
And pressure, second group of temperature, pressure transmitter 24 are used to acquire following for the common end 122 of the water outlet of multiple plate heat exchangers 12
The temperature and pressure of ring water.22, first groups of wet bulb temperature sensor, 23, second groups of temperature, pressure transmitter temperature, pressure transmitter
The various data of 24 acquisitions are all transmitted to programmable logic controller (PLC) 21, programmable logic controller (PLC) 21 to these data at
Reason.
Multiple cooling towers 11 include first group of cooling tower 113 and remaining cooling tower in addition to first group of cooling tower 113
114, remaining cooling tower 114 is respectively arranged with multiple blowers 1141 and multiple motor-driven valves 1142, multiple blowers 1141 and multiple electricity
Dynamic valve 1142 corresponds, and each motor-driven valve 1142 is correspondingly opened or closed in corresponding 1141 start and stop of blower, and first group
Cooling tower 113 is correspondingly arranged on first group of blower 1131, and the water outlet 1132 of first group of cooling tower 113 remains opening state
State, 1141, first groups of blowers 1131 of multiple blowers are electrically connected with programmable logic controller (PLC) 21 respectively.Multiple blowers 1141
Start and stop are controlled by programmable logic controller (PLC) 21, when cooling water temperature is lower, it is possible to reduce the starting of multiple blowers 1141
Number, so as to save hydroelectric resources；The water outlet 1132 of first group of cooling tower 113 remains open state, can guarantee
There is cooling water to flow through always in cooling water pipeline 14.
Wherein, it is respectively equipped with electric temperature control valve 123 on multiple plate heat exchangers 12, for according to the multiple plate-type heat-exchanges of inflow
The flow of its internal cooling water of the temperature adjust automatically of the cooling water of device 12, when the coolant water temperature for flowing into multiple plate heat exchangers 12
When degree is higher than temperature upper limit, increase cooling water flow, when the cooling water temperature for flowing into multiple plate heat exchangers 12 is lower than temperature
When lower limit value, reduce cooling water flow.
Programmable logic controller (PLC) 21 is used to calculate the temperature and second group of temperature of first group of temperature, pressure transmitter 23 acquisition
The temperature difference between the temperature that pressure transmitter 24 acquires is spent, and according to the comparison result of the temperature difference and preset temperature difference to change
The output frequency of frequency device 16 carries out constant difference PID control, to adjust in multiple outputs to cooling water pipeline 14 of circulating pump 13
Cooling water flow；Alternatively, programmable logic controller (PLC) 21 is used to calculate the pressure of first group of temperature, pressure transmitter 23 acquisition
Pressure difference between the pressure of second group of temperature, pressure transmitter 24 acquisition, and according to the ratio of the pressure difference and preset pressure difference
Relatively result carries out constant-pressure drop PID control to the output frequency of frequency converter 16, is supplied with adjusting multiple outputs of circulating pump 13 to cooling water
Cooling water flow in water lines 14.
Temperature that programmable logic controller (PLC) 21 is also used to acquire wet bulb temperature sensor 22 and the first preset temperature into
Row compares, and when the temperature that wet bulb temperature sensor 22 acquires is greater than the first preset temperature, controls multiple blowers 1141 and first
The all startings of group blower 1131, and open corresponding multiple motor-driven valves 1142；It is small in the temperature that wet bulb temperature sensor 22 acquires
When the first preset temperature, temperature the first temperature difference of every decline that wet bulb temperature sensor 22 acquires, programmable logic controller (PLC)
21 just stop the Fans in multiple blowers 1141, and close corresponding motor-driven valve 1142, wet bulb temperature sensor 22
The temperature of acquisition the first temperature difference of every rising, programmable logic controller (PLC) 21 will just be in halted state in multiple blowers 1141
One Fans are again started up, and open corresponding motor-driven valve 1142；In this way, environment temperature is lower in winter, cooling water temperature
When relatively low, multiple blowers 1141 may not necessarily all start, and corresponding multiple motor-driven valves 1142 need not be also all turned on,
Hydroelectric resources can effectively be saved.
As the preferred embodiment of the utility model, the common end 112 of the water outlet of multiple cooling towers 11 and multiple circulations
It is additionally provided with electronic scale remover 141 on cooling water pipeline 14 between the common end 131 of the water inlet of pump 13, for from more
The cooling water that the common end 112 of the water outlet of a cooling tower 11 is flowed out carries out scale removal.
As the preferred embodiment of the utility model, programmable logic controller (PLC) 21 is also connected with operator control panel 25, operator control panel 25
For switching the constant difference PID control or constant-pressure drop PID control that carry out to frequency converter 16.
As the preferred embodiment of the utility model, operator control panel 25 is also used to preset temperature upper limit, lowest temperature
Value, preset temperature is poor, preset pressure is poor, the first preset temperature and the first temperature difference.
As the preferred embodiment of the utility model, programmable logic controller (PLC) 21 is also connected with power cabinet 26, power cabinet 26
For providing power supply to circulating water cooling system.
Another side according to the present utility model provides a kind of circulating water cooling system autocontrol method.Incorporated by reference to referring to
Fig. 1 to Fig. 4, Fig. 2 are constant difference PID control in the autocontrol method of the circulating water cooling system of an embodiment of the utility model
The block diagram of system, Fig. 3 are constant-pressure drop PID in the autocontrol method of the circulating water cooling system of an embodiment of the utility model
The block diagram of control, Fig. 4 are blower control in the autocontrol method of the circulating water cooling system of an embodiment of the utility model
The logic chart of system.A kind of autocontrol method of circulating water cooling system of an embodiment of the present invention includes:
The temperature of the cooling water of the common end 112 of the water outlet of multiple cooling towers 11 is acquired using wet bulb temperature sensor 22
Degree, the cooling water of the common end 121 of the water inlet of multiple plate heat exchangers 12 is acquired using first group of temperature, pressure transmitter 23
Temperature and pressure, the common end of the water outlet of multiple plate heat exchangers 12 is acquired using second group of temperature, pressure transmitter 24
The temperature and pressure of 122 recirculated water, multiple cooling towers 11 include first group of cooling for being correspondingly arranged on first group of blower 1131
Tower 113 and remaining cooling tower 114 in addition to first group of cooling tower 113, remaining cooling tower 114 are respectively arranged with multiple blowers
1141 and correspond in multiple motor-driven valves 1142 of multiple blowers 1141, each motor-driven valve 1142 is opened in corresponding blower 1131
Stopping time correspondingly opens or closes, and the water outlet 1132 of first group of cooling tower 113 remains open state；
Using the electric temperature control valve 123 on multiple plate heat exchangers 12 according to the cooling for flowing into multiple plate heat exchangers 12
The flow of its internal cooling water of the temperature adjust automatically of water, when the cooling water temperature for flowing into multiple plate heat exchangers 12 is higher than temperature
When upper limit value, increase cooling water flow, when the cooling water temperature for flowing into multiple plate heat exchangers 12 is lower than temperature upper limit value, subtracts
Small cooling water flow；
The temperature and second group of temperature of the acquisition of first group of temperature, pressure transmitter 23 are calculated using programmable logic controller (PLC) 21
The temperature difference between the temperature that pressure transmitter 24 acquires is spent, and according to the comparison result of the temperature difference and preset temperature difference to change
The output frequency of frequency device 16 carries out constant difference PID control, to adjust in multiple outputs to cooling water pipeline 14 of circulating pump 13
Cooling water flow；Alternatively, calculating the pressure of first group of temperature, pressure transmitter 23 acquisition using programmable logic controller (PLC) 21
Pressure difference between the pressure of second group of temperature, pressure transmitter 24 acquisition, and according to the ratio of the pressure difference and preset pressure difference
Relatively result carries out constant-pressure drop PID control to the output frequency of frequency converter 16, is supplied with adjusting multiple outputs of circulating pump 13 to cooling water
Cooling water flow in water lines 14.The block diagram of the constant difference PID control of Fig. 2 is referred to, first in operator control panel 25 in advance
The pre- of the cooling water of the common end 121 of water inlet corresponding to multiple plate heat exchangers 12 and the common end 122 of water outlet is set
If temperature difference, programmable logic controller (PLC) 21 calculates the temperature and second group of temperature of first group of temperature, pressure transmitter 23 acquisition
The temperature difference between temperature that pressure transmitter 24 acquires, and according to the comparison result of the temperature difference and preset temperature difference to frequency conversion
The output frequency of device 16 carries out constant difference PID control, can when the temperature difference is greater than or gradually rises up to close to preset temperature difference
The control of programmed logic controller 21 increases the output frequency of frequency converter 16, to increase multiple outputs of circulating pump 13 to cooling water
Cooling water flow in pipeline 14, when the temperature difference is less than preset temperature difference, programmable logic controller (PLC) 21 does not change frequency conversion
The output frequency of device 16；Alternatively, referring to the block diagram of the constant-pressure drop PID control of Fig. 3, preset in operator control panel 25 first
The default pressure of the cooling water of the common end 122 of the common end 121 and water outlet of water inlet corresponding to multiple plate heat exchangers 12
Power is poor, and programmable logic controller (PLC) 21 calculates the pressure of first group of temperature, pressure transmitter 23 acquisition and second group of temperature, pressure becomes
The pressure difference between pressure for sending device 24 to acquire, and according to the comparison result of the pressure difference and preset pressure difference to frequency converter 16
Output frequency carries out constant-pressure drop PID control.
The temperature for being acquired wet bulb temperature sensor 22 using programmable logic controller (PLC) 21 and the first preset temperature are carried out
Compare, when the temperature that wet bulb temperature sensor 22 acquires is greater than the first preset temperature, controls multiple blowers 1141 and first group
The all startings of blower 1131, and open corresponding multiple motor-driven valves 1142；It is small in the temperature that wet bulb temperature sensor 22 acquires
When the first preset temperature, temperature the first temperature difference of every decline that wet bulb temperature sensor 22 acquires, programmable logic controller (PLC)
21 just stop the Fans in multiple blowers 1141, and close corresponding motor-driven valve 1142, wet bulb temperature sensor 22
The temperature of acquisition the first temperature difference of every rising, programmable logic controller (PLC) 21 will just be in halted state in multiple blowers 1141
One Fans are again started up, and open corresponding motor-driven valve 1142.The logic of blower start-up and shut-down control shown in Figure 4
Figure, when carrying out blower start-up and shut-down control, step S1 is first carried out: programmable logic controller (PLC) 21 adopts wet bulb temperature sensor 22
The temperature of collection is compared with the first preset temperature；Execute step S2 again: the temperature for judging that wet bulb temperature sensor 22 acquires is
It is no to be greater than the first preset temperature；If the temperature that wet bulb temperature sensor 22 acquires is greater than the first preset temperature, it is carried out step
S3: multiple blowers 1141 and first group of blower 1131 are all started, and open corresponding multiple motor-driven valves 1142；If wet
The temperature that ball temperature sensor 22 acquires is not more than the first preset temperature, and be carried out step S4: wet bulb temperature sensor 22 acquires
Temperature the first temperature difference of every decline, programmable logic controller (PLC) 21 just by multiple blowers 1141 a Fans stop, and
Close corresponding motor-driven valve 1142, temperature the first temperature difference of every rising that wet bulb temperature sensor 22 acquires, programmable logic
The Fans that halted state is in multiple blowers 1141 are just again started up by controller 21, and open corresponding motor-driven valve
1142。
In a kind of autocontrol method of circulating water cooling system of an embodiment of the present invention, electric temperature control valve is automatic
Adjust the cooling water flow in multiple plate heat exchangers 12, programmable logic controller (PLC) 21 carries out the output frequency of frequency converter 16
Constant difference PID control or constant-pressure drop PID control, programmable logic controller (PLC) 21 control multiple blowers 1141 starting number this
Three steps are synchronous to be executed, but the utility model is not limited thereto, in the other embodiments of the utility model, these three steps
Suddenly it can execute in other orders.
As the preferred embodiment of the utility model, temperature upper limit, temperature upper limit value, preset temperature be poor, preset pressure
Difference, the first preset temperature and the first temperature difference are configured in operator control panel 25.
As the preferred embodiment of the utility model, constant difference PID control and constant-pressure drop PID control by operator control panel 25 into
Row switching.
As the preferred embodiment of the utility model, first group of temperature, pressure transmitter 23 and second group of temperature, pressure pick-up
Device 24 is all made of current signal.In an embodiment of the utility model, first group of temperature, pressure transmitter 23 and second group of temperature
Spending the distance between pressure transmitter 24 and programmable logic controller (PLC) 21 is about 560 meters, belongs to least favorable circuit, temperature pressure
Power transmitter must use current signal.
As the preferred embodiment of the utility model, the first temperature difference is 2 degrees Celsius, but the utility model is not with this
It is limited, in the different embodiments of the utility model, the first temperature difference can be set according to production needs.
In the practical application of an embodiment of the utility model, power cabinet 26 is used to provide electricity to circulating water cooling system
Source, wet bulb temperature sensor 22 acquire the cooling water temperature of the common end 112 of the water outlet of multiple cooling towers 11, first group of temperature
Pressure transmitter 23 acquires the temperature and pressure data of the common end 121 of the water inlet of multiple plate heat exchangers 12, second group of temperature
Degree pressure transmitter 24 acquires the temperature and pressure data of the common end 122 of the water outlet of multiple plate heat exchangers 12, electronic temperature
Valve 123 is controlled according to the flow for flowing into the temperature adjust automatically of cooling water of multiple plate heat exchangers 12 cooling water；It is programmable to patrol
It collects controller 21 and constant difference PID control or constant-pressure drop PID control is carried out to the output frequency of frequency converter 16, adjust multiple circulating pumps
Cooling water flow in 13；Programmable logic controller (PLC) 21 is preset also according to the temperature that wet bulb temperature sensor 22 acquires with first
The comparison result of temperature controls the starting number of multiple blowers 1141；Meanwhile according to the technological requirements to cooling water pipeline 14
It is transformed with the size of recirculated water water return pipeline 15, the area of multiple plate heat exchangers 12, in conjunction with circulating water cooling system
Autocontrol method effectively enhances circulating water effect, reduces pure water consumption, reaches energy-saving and emission-reduction, reduces production
The double effects of cost.
The utility model provides a kind of circulating water cooling system, carries out constant difference PID control to the output frequency of frequency converter 16
System or constant-pressure drop PID control, the comparison result control of the temperature and the first preset temperature that are acquired also according to wet bulb temperature sensor 22
The starting number of multiple blowers 1141 is made, the water outlet 132 of first group of cooling tower 113 keeps it turned on, can either guarantee cold
But there is cooling water to flow through always in water water supply pipe 14, meet production needs, and hydroelectric resources can be saved, reduction is produced into
This.
The utility model is described by above-mentioned related embodiment, however above-described embodiment is only to implement the utility model
Example.It must be noted that the embodiment disclosed is not limiting as the scope of the utility model.On the contrary, not departing from this
It is changed and retouched made by the spirit and scope of utility model, belongs to the scope of patent protection of the utility model.
Claims (4)
1. a kind of circulating water cooling system, which is characterized in that including circulating water unit and control transmission unit, the circulation
Water cooling unit includes multiple cooling towers in parallel, multiple plate heat exchangers in parallel, multiple circulating pumps in parallel, cooling water confession
The water outlet of the multiple cooling tower is arranged in water lines, recirculated water water return pipeline and frequency converter, the cooling water pipeline
Common end and the multiple plate heat exchanger water inlet common end between, the recirculated water water return pipeline is arranged described
It is the multiple to follow between the common end of the water outlet of the common end of the water inlet of multiple cooling towers and the multiple plate heat exchanger
Ring pump is arranged on the cooling water supply pipe road, described for adjusting the flow of cooling water in the cooling water pipeline
Frequency converter is used to adjust the revolving speed of the multiple circulating pump；The control transmission unit includes programmable logic controller (PLC), wet bulb
Temperature sensor, first group of temperature, pressure transmitter and second group of temperature, pressure transmitter, it is the wet bulb temperature sensor, described
First group of temperature, pressure transmitter, second group of temperature, pressure transmitter electrically connect with the programmable logic controller (PLC) respectively
It connects, the frequency converter is also electrically connected with the programmable logic controller (PLC), and the wet bulb temperature sensor is described for acquiring
The temperature of the cooling water of the common end of the water outlet of multiple cooling towers, first group of temperature, pressure transmitter are described for acquiring
The temperature and pressure of the cooling water of the common end of the water inlet of multiple plate heat exchangers, second group of temperature, pressure transmitter are used
In the temperature and pressure of the recirculated water of the common end for the water outlet for acquiring the multiple plate heat exchanger；
The multiple cooling tower includes first group of cooling tower and remaining cooling tower in addition to first group of cooling tower, it is described its
Remaining cooling tower is respectively arranged with multiple blowers and multiple motor-driven valves, and the multiple blower and multiple motor-driven valves correspond, each
Motor-driven valve is correspondingly opened or closed in corresponding blower start and stop, and first group of cooling tower is correspondingly arranged on first group of wind
Machine, the water outlet of first group of cooling tower remain open state, the multiple blower, first group of blower respectively with
The programmable logic controller (PLC) electrical connection；
Wherein, it is respectively equipped with electric temperature control valve on the multiple plate heat exchanger, for according to the multiple plate-type heat-exchange of inflow
The flow of its internal cooling water of the temperature adjust automatically of the cooling water of device.
2. circulating water cooling system as described in claim 1, which is characterized in that the water outlet of the multiple cooling tower it is public
Cooling water supply pipe road between the common end of the water inlet of end and the multiple circulating pump is additionally provided with electronic scale remover, is used for
Scale removal is carried out to the cooling water of the common end outflow of the water outlet from the multiple cooling tower.
3. circulating water cooling system as described in claim 1, which is characterized in that the programmable logic controller (PLC) is also connected with behaviour
Work shields, and the operator control panel is used to switch the constant difference PID control or constant-pressure drop PID control for carrying out the frequency converter.
4. circulating water cooling system as described in claim 1, which is characterized in that the programmable logic controller (PLC) is also connected with dynamic
Power cabinet, the power cabinet are used to provide power supply to the circulating water cooling system.
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|---|---|---|---|
| CN201821804367.9U CN209655821U (en) | 2018-11-04 | 2018-11-04 | A kind of circulating water cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821804367.9U CN209655821U (en) | 2018-11-04 | 2018-11-04 | A kind of circulating water cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110986618A (en) * | 2019-12-10 | 2020-04-10 | 山西太钢不锈钢股份有限公司 | Recycling method of cooling tower |
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2018
- 2018-11-04 CN CN201821804367.9U patent/CN209655821U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110986618A (en) * | 2019-12-10 | 2020-04-10 | 山西太钢不锈钢股份有限公司 | Recycling method of cooling tower |
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