CN105841408B - Closed-type circulating cooling water energy-saving driving system and method - Google Patents
Closed-type circulating cooling water energy-saving driving system and method Download PDFInfo
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- CN105841408B CN105841408B CN201610341289.2A CN201610341289A CN105841408B CN 105841408 B CN105841408 B CN 105841408B CN 201610341289 A CN201610341289 A CN 201610341289A CN 105841408 B CN105841408 B CN 105841408B
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
Abstract
The invention discloses a kind of closed-type circulating cooling water energy-saving driving system and methods.The closed-type circulating cooling water energy-saving driving system, including closed type water tank, the closed-type circulating cooling water circuit being connected to closed type water tank；Closed-type circulating cooling water circuit includes the water main pipe being connected to closed type water tank, it is sequentially connected the enclosed cooling water pump component being set in water main pipe, enclosed water heat exchanger and multiple cooling equipment pipelines arranged side by side, and the return water main pipe of connection each cooling equipment pipeline and enclosed cooling water pump component；Enclosed cooling water pump component includes the closed-type circulating cooling water pump being set in water main pipe, and the double-speed motor of driving closed-type circulating cooling water pump, the entrance of closed-type circulating cooling water pump is connected to return water main pipe, the outlet of closed-type circulating cooling water pump is connected to enclosed water heat exchanger.The case where technical solution proposed by the present invention is not in " suppressing pump ", will not cause energy loss, it is ensured that cooling water system safe and stable operation.
Description
Technical field
The present invention relates to power-plant cooling water systems technology field, more particularly to a kind of energy saving driving of closed-type circulating cooling water
System and method.
Background technology
In traditional technology, the closed-type circulating cooling water system that domestic thermal power plant uses generally configures two closed cycles
Cooling water pump, and the type selecting of closed-type circulating cooling water pump is determined according to cooling water inflow needed for each subsidiary engine equipment of summer condition.According to
Power plant runs feedack, and closed-type circulating cooling water pump is all right in summer operation, but to winter, since each subsidiary engine is set
Standby required cooling water inflow is reduced, and finds that most of control valve opening is minimum in operation, and only 6% or so, cause closed cycle to cool down
There is the case where " suppressing pump " in water pump, can only open the main pipe communicating door of closed-type circulating cooling water system thus to reduce pressure, but
A large amount of energy loss can be caused again in this way.
Invention content
Based on this, in view of the above-mentioned problems, the present invention proposes a kind of closed-type circulating cooling water energy-saving driving system and method, no
The case where will appear " suppressing pump ", energy loss will not be caused, it is ensured that cooling water system safe and stable operation.
Its technical solution is as follows：
A kind of closed-type circulating cooling water energy-saving driving system, including closed type water tank, the enclosed being connected to the closed type water tank
Circulating cooling water loop；The closed-type circulating cooling water circuit includes the water main pipe being connected to the closed type water tank, is connected successively
Connect the enclosed cooling water pump component being set in the water main pipe, enclosed water heat exchanger, multiple cooling equipment pipes arranged side by side
Road, and it is connected to the return water main pipe of each cooling equipment pipeline and the enclosed cooling water pump component；The enclosed cooling
Water pump component includes the closed-type circulating cooling water pump being set in the water main pipe, and the driving closed-type circulating cooling water
The double-speed motor of pump, the entrance of closed-type circulating cooling water pump is connected to the return water main pipe, the closed-type circulating cooling water
The outlet of pump is connected to the enclosed water heat exchanger.
Closed type water tank supplies water to closed-type circulating cooling water circuit, i.e., is cooled down chilled(cooling) water supply (CWS) to enclosed by water main pipe
Cooling water pump is sent in enclosed water heat exchanger by water pump component, enclosed cooling water pump component, and heat exchange is carried out to drop with the external world
Then cooling water after cooling is transported in cooling equipment pipeline by the temperature of low cooling water, need cooling equipment to various
It cools down, then cooling water flows back into enclosed cooling water pump component, enclosed cooling water pump component from cooling equipment pipeline
Continue cooling water being transported in enclosed water heat exchanger and carry out heat exchange cooling, then the cooling to cooling equipment Pipeline transport cooling
Water cools down equipment, moves in circles, to form a closed-type circulating cooling water system.In the process, enclosed cools down
The closed-type circulating cooling water of water pump component pumps under the driving of double-speed motor, according to different temperature features, with different rotating speeds
Closed-type circulating cooling water pump operating is driven, while regulating valve cooperation carries out aperture adjustment, makes entire closed-type circulating cooling water circuit
The flow of middle cooling water is corresponding with the rotating speed that closed-type circulating cooling water pumps.In this way, would not generate in the lower feelings of environment temperature
It under condition, finds that most of control valve opening is minimum since cooling water inflow needed for each subsidiary engine equipment is reduced, in operation, and leads to enclosed
The case where " suppressing pump " occurs in recirculated cooling water pump occurs.Also need not open the main pipe communicating door of closed-type circulating cooling water system with
Pressure is reduced, to which the energy loss of system will not be caused.
Its further technical solution is illustrated below：
Further, the enclosed cooling water pump component includes being arranged in parallel to follow in the first enclosed in the return water main pipe
Ring cooling water pump and the second closed-type circulating cooling water pump, and the first double speed corresponding with the first closed-type circulating cooling water pump
Motor, the second double-speed motor corresponding with the second closed-type circulating cooling water pump.
Further, the enclosed cooling water pump component further includes being closed with first closed-type circulating cooling water pump and second
The special closed-type circulating cooling water pump of low temperature of formula recirculated cooling water parallel connection of pumps, and the special closed-type circulating cooling water pump of the low temperature holds
Amount is less than the capacity of first closed-type circulating cooling water pump or the second closed-type circulating cooling water pump.
Further, further include the flow control valve in the exit for being set to the enclosed water heat exchanger；
The flow control valve includes the full capacity gate valve or shut-off valve being set in the water main pipe, and the full appearance
Measure the outlet of gate valve or shut-off valve one end and the enclosed water heat exchanger and the other end and the cooling equipment pipeline
Entrance is connected to；Further include being set to 60% capacity regulating in parallel with the full capacity gate valve or shut-off valve in the water main pipe
Valve.
Further, the closed-type circulating cooling water circuit further includes the entrance for being set to the enclosed cooling water pump component
The temperature sensor at place, the temperature sensor are electrically connected with the flow control valve and double-speed motor.
Further, the enclosed water heat exchanger includes being arranged in parallel to hand in the first enclosed hydro-thermal in the return water main pipe
Parallel operation and the second enclosed water heat exchanger.
Further, the enclosed cooling water pump component further includes being set in the water main pipe and being located at the enclosed
The shut-off valve and control valve of circulating cooling water pump both sides.
Further, the cooling equipment pipeline includes the water supply branch pipe being connected to the water main pipe, with the water supply
The cooling equipment of branch pipe connection, and it is connected to the return branch of the cooling equipment and the return water main pipe.
Further, the cooling equipment includes steam turbine ancillary equipment, boiler auxiliaries, generator ancillary equipment.
Further, further include the condensate system being connected to the closed type water tank and DW system demineralized water system.
In addition, the present invention also proposes a kind of energy saving driving method of closed-type circulating cooling water, include the following steps：
Double-speed motor drives closed-type circulating cooling water pump work, and recirculated cooling water, which is transported to enclosed water heat exchanger, to carry out
Heat exchange cooling, then the recirculated cooling water after heat exchange is transported to cooling equipment pipeline, various equipment are cooled down, then recycle
The cooling equipment pipeline of cooling water outflow simultaneously flows back to closed-type circulating cooling water pump；
When recirculated cooling water by enclosed water heat exchanger exchange heat water temperature after cooling be in high value when, increase stream
The aperture of adjustable valve simultaneously adjusts double-speed motor and runs at high speed, and increases the circulating cooling flow being transported in cooling equipment pipeline
Amount；
When recirculated cooling water by enclosed water heat exchanger exchange heat water temperature after cooling be in lower value when, reduce stream
The aperture of adjustable valve simultaneously adjusts double-speed motor low-speed running, reduces the circulating cooling flow being transported in cooling equipment pipeline
Amount.
Further, further include following steps：
When recirculated cooling water is in high value and lower value by the enclosed water heat exchanger water temperature after cooling that exchange heat
Between when, adjust the aperture of flow control valve and double-speed motor made to run at high speed, adjusting be transported to following in cooling equipment pipeline
Ring cooling water flow.
Further, further include following steps：
Temperature sensor monitors the temperature of the recirculated cooling water of the inlet of enclosed cooling water pump component in real time, according to monitoring
The aperture of temperature regulated flow regulating valve, and the rotating speed for controlling double-speed motor is adjusted according to the aperture of flow control valve.
The present invention has following advantageous effect outstanding：
1, closed-type circulating cooling water pump configuration double-speed motor, makes closed-type circulating cooling water pump when environment temperature is higher (such as
Summer), environment temperature it is relatively low when (such as winter) two operating modes can operate in high efficient district, not only avoided occur " suppressing pump " situation, but also
It is conducive to extend the service life of pump；
2, speed governing closed-type circulating cooling water pump is adjusted by the way of changing double-speed motor rotating speed, it is cold to adjust closed cycle
But the rate of discharge of water pump, than by more energy saving using tune valve flow restriction control in pipeline；
3, when the double-speed motor slow-speed of revolution drives closed-type circulating cooling water pump operating, flow control valve holding is larger in pipeline opens
Degree, advantageously reduces piping resistance, improves the economy of unit operation.
Description of the drawings
Fig. 1 is the structural schematic block diagram of closed-type circulating cooling water energy-saving driving system described in the embodiment of the present invention；
Fig. 2 is the step schematic block diagram of the energy saving driving method of closed-type circulating cooling water described in the embodiment of the present invention.
Reference sign：
100- closed type water tanks, 200- water main pipes, 210- temperature sensors, 220- full capacity gate valves, 230-60% capacity
Regulating valve, 300- enclosed cooling water pump components, the first closed-type circulating cooling waters of 310- pump, the second closed-type circulating cooling waters of 320-
Pump, the special closed-type circulating cooling water pump of 330- low temperature, 400- enclosed water heat exchangers, 410- the first enclosed water heat exchangers,
420- the second enclosed water heat exchangers, 500- cooling equipment pipelines, 502- steam turbine ancillary equipments, 504- boiler auxiliaries,
506- generator ancillary equipments, other ancillary equipments of 508-, 510- water supply branch pipes, 520- return branch, 600- return water main pipes.
Specific implementation mode
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of closed-type circulating cooling water energy-saving driving system, including closed type water tank 100, with the closed-up water
The closed-type circulating cooling water circuit that case 100 is connected to, closed type water tank 100 is to closed-type circulating cooling water circuit cooling water supply.It is described
Closed-type circulating cooling water circuit includes the water main pipe 200 being connected to the closed type water tank 100, is sequentially connected and is set to the confession
Enclosed cooling water pump component 300, enclosed water heat exchanger 400, multiple cooling equipment pipelines being set up in parallel on jellyfish pipe 200
500, and it is connected to the return water main pipe 600 of each cooling equipment pipeline 500 and the enclosed cooling water pump component 300.
I.e. by water main pipe 200 by chilled(cooling) water supply (CWS) to enclosed cooling water pump component 300, enclosed cooling water pump component
300 are sent to cooling water pump in enclosed water heat exchanger 400, and heat exchange is carried out to reduce the temperature of cooling water, then with the external world
Cooling water after cooling is transported in cooling equipment pipeline 500, needs cooling equipment to cool down to various, then
Cooling water flows back into enclosed cooling water pump component 300 from cooling equipment pipeline 500, and enclosed cooling water pump component 300 continues will be cold
But water, which is transported in enclosed water heat exchanger 400, carries out heat exchange cooling, then to the cooling water of the cooling conveying of equipment pipeline 500 cooling
Equipment is cooled down, is moved in circles, to form a closed-type circulating cooling water system.
Moreover, the enclosed cooling water pump component 300 includes the closed cycle cooling being set in the water main pipe 200
Water pump, and driving closed-type circulating cooling water pump double-speed motor, the entrance of the closed-type circulating cooling water pump with it is described
The connection of return water main pipe 600, the outlet of closed-type circulating cooling water pump are connected to the enclosed water heat exchanger 400.Above-mentioned
During circulating cooling, the closed-type circulating cooling water of enclosed cooling water pump component 300 pumps under the driving of double-speed motor, according to
Different temperature features, with different rotating speed driving closed-type circulating cooling water pump operatings, while the regulating valve in pipeline coordinate into
Row aperture adjusts, and makes the rotating speed pair of the flow of cooling water and closed-type circulating cooling water pump in entire closed-type circulating cooling water circuit
It answers.In this way, would not generate at low ambient temperatures, since cooling water inflow needed for each subsidiary engine equipment is reduced but transport
Most of control valve opening is minimum in row, and causes closed-type circulating cooling water to pump the case where " suppressing pump " occur and occur.It does not need yet
The main pipe communicating door of closed-type circulating cooling water system is opened to reduce pressure, to which the energy loss of system will not be caused.
Further, the enclosed cooling water pump component 300 includes being arranged in parallel in first in the return water main pipe 600
Closed-type circulating cooling water pump 310 and the second closed-type circulating cooling water pump 320, and pumped with first closed-type circulating cooling water
310 corresponding first double-speed motors pump 320 corresponding second double-speed motors with second closed-type circulating cooling water.It sets simultaneously
Two closed-type circulating cooling water pumps and corresponding double-speed motor are set, one of closed-type circulating cooling water pump can be regarded standby
With, make another closed-type circulating cooling water pump break down when remain to normally pump, ensure system run well.For example, working as
One closed-type circulating cooling water pump trips in operation, then another stand-by pump interlocks self-starting, and system can be maintained normal
Operation.Alternatively, two closed-type circulating cooling water pumps can also be made to work at the same time, the big flow to meet cooling equipment pipeline cools down
Water demand.
In addition, the enclosed cooling water pump component 300 may also include and first closed-type circulating cooling water pump 310 and the
The special closed-type circulating cooling water pump 330 of the low temperature in parallel of two closed-type circulating cooling waters pump 320, and the special closed cycle of the low temperature
330 capacity of cooling water pump is less than the appearance of first closed-type circulating cooling water pump 310 or the second closed-type circulating cooling water pump 320
Amount.The special closed-type circulating cooling water pump 330 of the smaller low temperature of the capacity can be directly enabled when environment temperature is relatively low, and closed
The closed-type circulating cooling water pump used when high temperature and when other temperature.When can guarantee that environment temperature is relatively low in winter, the enclosed
Cooling water pump component 300 remains to normal, economical operation.
It is set in the water main pipe and is closed positioned at described moreover, the enclosed cooling water pump component 300 may also include
The shut-off valve and control valve (not illustrated in figure) of formula circulating cooling water pump both sides.It, can be to institute by shut-off valve and control valve
The inflow and outflow for stating closed-type circulating cooling water pump is controlled.
In addition, the enclosed water heat exchanger 400 includes being arranged in parallel in the first enclosed hydro-thermal in the return water main pipe 600
Exchanger 410 and the second enclosed water heat exchanger 420.Two enclosed water heat exchangers are set, it can be by one of closed-up water
Heat exchanger is as primary, another enclosed water heat exchanger is as spare, when an enclosed water heat exchanger breaks down,
Another enclosed water heat exchanger can be enabled.It thereby may be ensured that cooling water system runs well, ensure unit safety operation.
Furthermore, it is also possible to two enclosed water heat exchangers, to meet the heat exchange cooling requirement of cooling water.
In addition, system further includes the flow control valve in the exit for being set to the enclosed water heat exchanger 400.Pass through tune
The aperture of rectification adjustable valve controls the cooling water flow of outlet, to control into cold in cooling equipment pipeline 500
But water flow.Specifically, the flow control valve includes the full capacity gate valve 220 being set in the water main pipe 200 or cuts
Only valve, and the outlet of the full capacity gate valve 220 or shut-off valve one end and the enclosed water heat exchanger 400 and it is another
End is connected to the entrance of the cooling equipment pipeline 500.Flow control valve may also include be set in the water main pipe 200 with
The full capacity gate valve 220 or 60% capacity control valve 230 of shut-off valve parallel connection, 60% capacity control valve 230 be set to
On the full capacity gate valve 220 or the shunt valve of shut-off valve parallel connection.In this way, it is higher in summer this environment temperature,
Full capacity gate valve 220 or shut-off valve are enabled, normally to cooling 500 cooling water supply of equipment pipeline.In other cases, example
In the case of environment temperature is lower such as winter, 60% capacity control valve 230 on shunt valve is enabled, reduction is supplied to described
Cooling 500 cooling water flow of equipment pipeline.In this way, main road when summer condition (environment temperature is higher), other times bypass
60% capacity control valve 230 on pipe carrys out water diversion volume, even if when winter (environment temperature is relatively low), regulating valve still has 36% or so to open
Degree, it is ensured that certain through-current capacity.
In addition, the closed-type circulating cooling water circuit, which may also include, is set to entering for the enclosed cooling water pump component 300
At mouthful pipeline and the temperature sensor 210 in cooling 500 exit of equipment pipeline, the temperature sensor 210 and the stream
Adjustable valve and double-speed motor electrical connection.Temperature sensor 210 can be to by the cold of cooling 500 cooling heat transferring of equipment pipeline
But coolant-temperature gage is monitored, and can be to being set to the stream in 400 exit of enclosed water heat exchanger according to monitoring temperature
The aperture of adjustable valve (i.e. full capacity gate valve 220 or 60% capacity control valve 230) is adjusted, and passes through the flow-rate adjustment
The rotating speed that the aperture of valve controls the double-speed motor is adjusted and (is switched to low speed or high speed), to realize to closed cycle
The rotating speed of cooling water pump is adjusted, and the cooling water flow of cooling equipment pipeline 500 is flowed to control.
It is and described in addition, the cooling equipment pipeline 500 includes the water supply branch pipe 510 being connected to the water main pipe 200
The cooling equipment that water supply branch pipe 510 is connected to, and it is connected to the return branch 520 of the cooling equipment and the return water main pipe 600.
By water supply branch pipe 510, by cooling water from being introduced into water main pipe 200 in cooling equipment, heat exchange cooling is carried out to cooling equipment,
And the cooling water after heat exchange is transported in return water main pipe 600 by return branch 520.Further, the cooling equipment packet
Include steam turbine ancillary equipment 502, boiler auxiliaries 504, generator ancillary equipment 506 and other ancillary equipments 508.Deaeration
The cooling water of the main and auxiliary machine equipment in all main buildings outside machine oil cooler can be provided by this system.
In addition, the closed-type circulating cooling water energy-saving driving system further includes the condensation being connected to the closed type water tank 100
Water system (not illustrated in figure) and DW system demineralized water system.The system is cooled down using the chemical demineralizing water of DW system demineralized water system as system
Then working medium (cooling water) is cooled down with condensate transfer pump to closed type water tank and its pipeline water-filling of system by closed cycle
It is recycled in closed circuit after water pump boosting, the supply when condensed water from condensate system is as the system normal operation
Water.
In addition, as shown in Fig. 2, the present invention also proposes a kind of energy saving driving method of closed-type circulating cooling water, including walk as follows
Suddenly：
S100, double-speed motor drive closed-type circulating cooling water pump work, and recirculated cooling water is transported to enclosed hydrothermal exchange
Device 400 carries out heat exchange cooling, then by the recirculated cooling water after heat exchange be transported to cooling equipment pipeline 500 to various cooling equipment into
Row cools down, and then recirculated cooling water flows out cooling equipment pipeline 500 and flows back to closed-type circulating cooling water pump；
S200, it is cooled down and through supercooling equipment pipeline when recirculated cooling water carries out heat exchange by enclosed water heat exchanger 400
When cooler-water temperature after 500 heat exchange coolings is in high value, increase the aperture of flow control valve (i.e. full capacity gate valve 220) simultaneously
So that double-speed motor is run at high speed, increases the circulating cooling water flow being transported in cooling equipment pipeline 500；
Further, further include following steps：
Temperature sensor 210 monitors set with the cooling at the entrance pipe of the enclosed cooling water pump component 300 in real time
The temperature of recirculated cooling water at 500 export pipeline of standby pipeline, (such as when detecting that the temperature of recirculated cooling water is in high value
The high value of temperature can be set as 25 degrees Celsius, may be alternatively provided as other values, can be determined according to actual conditions), according to
Monitoring temperature adjusts the aperture of flow control valve (i.e. full capacity gate valve 220), that is, increases going out for the enclosed water heat exchanger 400
The aperture of flow control valve at mouthful pipeline and at cooling 500 entrance pipe of equipment pipeline, so as to adjust turning for double-speed motor
The adjustment of rotational speed of double-speed motor is high speed by speed to be made to drive closed-type circulating cooling water pump (310 or 320) to run at high speed
Cooling water flow is corresponding with closed-type circulating cooling water pump discharge in water main pipe 200, and increase is transported to the cooling equipment pipeline
Circulating cooling water flow in 500 ensures that cooling water system runs well.
S300, it is cooled down and through supercooling equipment pipeline when recirculated cooling water carries out heat exchange by enclosed water heat exchanger 400
When cooler-water temperature after 500 heat exchange coolings is in lower value, reducing flow control valve, (i.e. full capacity gate valve 220 or 60% holds
Adjustable valve 230) aperture and make double-speed motor low-speed running, reduce and be transported to circulating cooling in cooling equipment pipeline 500
Water flow.
Further, may also include the steps of：
S310, temperature sensor 210 monitor at the entrance pipe of the enclosed cooling water pump component 300 and described cold in real time
But the temperature of the recirculated cooling water at 500 export pipeline of equipment pipeline, when detecting that the temperature of recirculated cooling water is in lower value
When (such as the high value of temperature can be set as 10 degrees Celsius, may be alternatively provided as other values, can be determined according to actual conditions),
The aperture of flow control valve (i.e. full capacity gate valve 220) is adjusted according to monitoring temperature, that is, reduces the aperture of flow control valve, and root
The rotating speed of double-speed motor is controlled according to the aperture regulation of flow control valve, i.e., is low speed by the adjustment of rotational speed of double-speed motor, to drive
Dynamic closed-type circulating cooling water pumps (310 or 320) low-speed running, and cooling water flow in water main pipe 200 is made to be cooled down with closed cycle
Water pump (310 or 320) flow corresponds to, and reduces the circulating cooling water flow being transported in cooling equipment pipeline 500, ensures cooling water
System runs well.
In addition, it may further comprise following steps：
S320, temperature sensor 210 monitor at the entrance pipe of the enclosed cooling water pump component 300 and described cold in real time
But the temperature of the recirculated cooling water at 500 export pipeline of equipment pipeline, when detecting that the temperature of recirculated cooling water is in lower value
When, the startup low temperature in parallel with first closed-type circulating cooling water pump 310 and the second closed-type circulating cooling water pump 320 is special to be closed
Formula circulating cooling water pump 330, and the first closed-type circulating cooling water pump 310 and the second closed-type circulating cooling water pump 320 are closed,
Reduce 300 output flow of enclosed cooling water pump component, it is ensured that when environment temperature is relatively low in winter, the enclosed cooling water pump group
Part 300 remains to normal, economical operation.
In addition, it may further comprise following steps：
S330, temperature sensor 210 monitor at the entrance pipe of the enclosed cooling water pump component 300 and described cold in real time
But the temperature of the recirculated cooling water at 500 export pipeline of equipment pipeline, when detecting that the temperature of recirculated cooling water is in lower value
When, 60% capacity control valve 230 being arranged on the shunt valve in parallel with the full capacity gate valve 220 or shut-off valve is enabled, and protect
The enclosed cooling water pump component 300 running speed higher in environment temperature is held, 60% on shunt valve is used
Capacity control valve 230 carrys out water diversion volume, and flow control valve 210 when (environment temperature is relatively low) in winter is made still to have 36% or so aperture,
It can guarantee certain through-current capacity.
It moreover, above-mentioned steps S310, S320, S330 can be used alone, can also be used in conjunction with each other, can reach
When environment temperature is relatively low (such as winter), enclosed cooling water pump component remains to work normally, and is not in " suppressing pump ", need not also arrange
Water and off-energy.
S400, it is cooled down and through supercooling equipment pipeline when recirculated cooling water carries out heat exchange by enclosed water heat exchanger 400
When cooler-water temperature after 500 heat exchange coolings is between high value and lower value, double-speed motor runs at high speed and adjusts flow
The aperture of regulating valve adjusts the circulating cooling water flow being transported in cooling equipment pipeline 500.
Further, temperature sensor 210 monitors at the entrance pipe of the enclosed cooling water pump component 300 and institute in real time
The temperature for stating the recirculated cooling water at cooling 500 export pipeline of equipment pipeline, when detect recirculated cooling water temperature be in compared with
When between high level and lower value, the aperture of flow control valve (i.e. full capacity gate valve 220) is adjusted according to monitoring temperature, i.e., it is appropriate to increase
The aperture of large flux control valve, and according to the rotating speed of the aperture of flow control valve control double-speed motor, i.e., turn double-speed motor
Speed is adjusted to high speed, to drive closed-type circulating cooling water pump (310 or 320) to run at high speed, makes cooling water in water main pipe 200
Flow is corresponding with closed-type circulating cooling water pump (310 or 320) flow, and appropriate increase is transported to following in cooling equipment pipeline 500
Ring cooling water flow ensures that cooling water system runs well.
In above-mentioned closed-type circulating cooling water energy-saving driving system, closed-type circulating cooling water pump is driven using double-speed motor
It is dynamic, in winter when operating mode (environment temperature is relatively low), the slow-speed of revolution is switched to replace high rotating speed, reduces water supply.Simultaneously in pipeline
Flow control valve keep larger opening, advantageously reduce resistance.The energy saving driving system of closed-type circulating cooling water proposed by the present invention
System and method keep closed-type circulating cooling water pump higher in environment temperature by pumping configuration double-speed motor to closed-type circulating cooling water
When (such as summer), environment temperature it is relatively low when (such as winter) two operating modes can operate in high efficient district, both avoided that " suppressing pump " feelings occur
Condition, and it is conducive to extend the service life of pump；Speed governing closed-type circulating cooling water is adjusted by the way of changing double-speed motor rotating speed
Pump, to adjust the rate of discharge of closed-type circulating cooling water pump, than by more energy saving using tune valve flow restriction control in pipeline；It is double
When the speed motor slow-speed of revolution drives closed-type circulating cooling water pump operating, flow control valve keeps larger opening in pipeline, is conducive to drop
Low piping resistance, improves the economy of unit operation.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (7)
1. a kind of closed-type circulating cooling water energy-saving driving system, which is characterized in that including closed type water tank, connect with the closed type water tank
Logical closed-type circulating cooling water circuit；
The closed-type circulating cooling water circuit includes the water main pipe being connected to the closed type water tank, is sequentially connected described in being set to
Enclosed cooling water pump component, enclosed water heat exchanger, multiple cooling equipment pipelines arranged side by side in water main pipe, and connection are every
The return water main pipe of a cooling equipment pipeline and the enclosed cooling water pump component；
The enclosed cooling water pump component includes the closed-type circulating cooling water pump being set in the water main pipe, and driving institute
State the double-speed motor of closed-type circulating cooling water pump, the entrance of closed-type circulating cooling water pump is connected to the return water main pipe, institute
The outlet for stating closed-type circulating cooling water pump is connected to the enclosed water heat exchanger；
The enclosed cooling water pump component include be arranged in parallel in the return water main pipe the first closed-type circulating cooling water pump and
Second closed-type circulating cooling water pump, and the first double-speed motor corresponding with the first closed-type circulating cooling water pump, with it is described
Second closed-type circulating cooling water pumps corresponding second double-speed motor；
The enclosed cooling water pump component further includes and first closed-type circulating cooling water pumps and the second closed-type circulating cooling water
The special closed-type circulating cooling water pump of the low temperature of parallel connection of pumps, and the special closed-type circulating cooling water pump capacity of the low temperature is less than described the
One closed-type circulating cooling water pumps or the capacity of the second closed-type circulating cooling water pump；
It further include the flow control valve in the exit for being set to the enclosed water heat exchanger；The flow control valve includes setting
In full capacity gate valve or shut-off valve in the water main pipe, and the full capacity gate valve or shut-off valve one end and the closed-up water
The outlet of heat exchanger and the other end is connected to the entrance of the cooling equipment pipeline；Further include being set to the water supply
60% capacity control valve in parallel with the full capacity gate valve or shut-off valve in main pipe.
2. closed-type circulating cooling water energy-saving driving system according to claim 1, which is characterized in that the closed cycle is cold
But water loop further includes the temperature sensor for the inlet for being set to the enclosed cooling water pump component, the temperature sensor with
The flow control valve and double-speed motor electrical connection.
3. closed-type circulating cooling water energy-saving driving system according to claim 1, which is characterized in that the enclosed hydro-thermal is handed over
Parallel operation includes being arranged in parallel in the first enclosed water heat exchanger in the return water main pipe and the second enclosed water heat exchanger.
4. closed-type circulating cooling water energy-saving driving system according to claim 1, which is characterized in that the enclosed cooling water
Pump group part further includes being set in the water main pipe and being pumped positioned at the closed-type circulating cooling water shut-off valve and the control of both sides
Valve.
5. a kind of closed cycle of the energy-saving driving system of closed-type circulating cooling water according to any one of claims 1-4 is cold
But the energy saving driving method of water, which is characterized in that include the following steps：
Double-speed motor drives closed-type circulating cooling water pump work, and recirculated cooling water is transported to enclosed water heat exchanger and is exchanged heat
It cools down, then the recirculated cooling water after heat exchange is transported to cooling equipment pipeline, various equipment are cooled down, then circulating cooling
The cooling equipment pipeline of water outflow simultaneously flows back to closed-type circulating cooling water pump；
When recirculated cooling water by enclosed water heat exchanger exchange heat water temperature after cooling be in high value when, increase flow tune
It saves the aperture of valve and adjusts double-speed motor and run at high speed, increase the circulating cooling water flow being transported in cooling equipment pipeline；
When recirculated cooling water by enclosed water heat exchanger exchange heat water temperature after cooling be in lower value when, reduce flow tune
It saves the aperture of valve and adjusts double-speed motor low-speed running, reduce the circulating cooling water flow being transported in cooling equipment pipeline.
6. the energy saving driving method of closed-type circulating cooling water according to claim 5, which is characterized in that further include walking as follows
Suddenly：
When recirculated cooling water exchange heat water temperature after cooling between high value and lower value by enclosed water heat exchanger
When, it adjusts the aperture of flow control valve and double-speed motor is made to run at high speed, it is cold to adjust the cycle being transported in cooling equipment pipeline
But water flow.
7. the energy saving driving method of closed-type circulating cooling water according to claim 5 or 6, which is characterized in that further include as follows
Step：
Temperature sensor monitors the temperature of the recirculated cooling water of the inlet of enclosed cooling water pump component in real time, according to monitoring temperature
The aperture of flow control valve is adjusted, and adjusts the rotating speed of control double-speed motor according to the aperture of flow control valve.
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| CN106759637B (en) * | 2017-02-24 | 2022-11-22 | 长江勘测规划设计研究有限责任公司 | Operation method of hydropower station open-close type combined technical water supply system |
| CN107990774B (en) * | 2017-12-29 | 2023-10-13 | 大连福佳·大化石油化工有限公司 | Extraction feeding heat exchange system |
| CN109357560A (en) * | 2018-11-07 | 2019-02-19 | 中国能源建设集团浙江省电力设计院有限公司 | A kind of closed-type circulating cooling water system and method for commissioning |
| CN109268194B (en) * | 2018-11-19 | 2023-12-19 | 西安西热节能技术有限公司 | System and method for improving technical water supply reliability of hydropower station |
| CN111121356B (en) * | 2019-11-19 | 2021-06-11 | 万洲电气股份有限公司 | Industrial circulating cooling water energy-saving system and method based on central cooling system |
| CN112554967A (en) * | 2020-12-07 | 2021-03-26 | 江苏南通发电有限公司 | Operation optimization method under limited plate number of closed coolers |
| CN113105922B (en) * | 2021-04-16 | 2021-12-07 | 广东韶钢松山股份有限公司 | Coke oven gas final cooling system |
| CN114659330A (en) * | 2022-03-11 | 2022-06-24 | 西安热工研究院有限公司 | Closed water system water quality improvement and cavitation erosion prevention system and operation method |
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| WO2010096028A1 (en) * | 2009-02-17 | 2010-08-26 | Utc Power Corporation | Water treatment system and method for a fuel cell power plant |
| CN103411473B (en) * | 2013-08-21 | 2016-03-30 | 上海宝钢节能技术有限公司 | Industrial circulating water system combination energy-saving method and industrial circulating water combination energy-saving system |
| CN203632473U (en) * | 2013-10-28 | 2014-06-04 | 哈尔滨电机厂有限责任公司 | 600MW grade nuclear power conventional island generator auxiliary engine stator cooling water system |
| CN104534917A (en) * | 2014-12-24 | 2015-04-22 | 深圳孚沃德斯科技有限公司 | Energy-saving control device and method for closed cooling circulation system |
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| CN205655535U (en) * | 2016-05-19 | 2016-10-19 | 中国能源建设集团广东省电力设计研究院有限公司 | Energy -conserving actuating system of closed circulation cooling water |
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