CN214944581U - Shutdown cooling device of gas-steam combined cycle unit - Google Patents
Shutdown cooling device of gas-steam combined cycle unit Download PDFInfo
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- CN214944581U CN214944581U CN202120997241.3U CN202120997241U CN214944581U CN 214944581 U CN214944581 U CN 214944581U CN 202120997241 U CN202120997241 U CN 202120997241U CN 214944581 U CN214944581 U CN 214944581U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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Abstract
The embodiment of the utility model provides a shutdown cooling device of a gas-steam combined cycle unit, wherein a closed water expansion water tank is communicated with a closed water conveying pipeline; one end of the booster pump inlet main pipe is connected with the closed cold water outlet main pipe, and the other end of the booster pump inlet main pipe is respectively connected with the water inlet ends of the closed cold water booster pumps; one end of the booster pump outlet main pipe is respectively connected with the water outlet ends of the closed cold water booster pumps, and the other end of the booster pump outlet main pipe is connected with the closed cold water circulating pipeline; an inlet main pipe of the booster pump is connected with a closed cold water circulating pipeline; a fifth control valve, a closed cold water circulating cooler and a sixth control valve are arranged on the closed cold water circulating pipeline; one end of the closed cold water delivery main pipe is connected with an outlet main pipe of the booster pump, and the other end of the closed cold water delivery main pipe is respectively connected with the water inlet ends of the coolers of the motor of the plurality of booster pumps; one end of the closed cold water return main pipe is respectively connected with the water outlet ends of the coolers of the motor of the plurality of superchargers, and the other end of the closed cold water return main pipe is connected with a closed water conveying pipeline; a communicating pipe communicated with a booster pump inlet main pipe is led out from the cold water closed return main pipe.
Description
Technical Field
The utility model relates to a gas-steam combined cycle unit technical field particularly, relates to a gas-steam combined cycle unit shuts down cooling device.
Background
In the prior art, a medium of a closed cooling water system of a gas-steam combined cycle unit group is chemical demineralized water, cooling water is provided for cooling equipment of the whole unit, circulating open water of a condenser is used for cooling, and water is supplemented by the chemical demineralized water. The system generally comprises two 100% plate heat exchangers and two 100% closed cooling water pumps, wherein the two closed cooling water pumps are one in operation and one in standby, and the closed cooling water system is also provided with an expansion water tank which is used as the pressure stabilizing and buffering of the closed cooling water system. And cooling water in the closed cooling water system flows to the closed cooling water pump, the closed circulating water heat exchanger, each cooling water user and the closed cooling water pump from the closed cooling water expansion water tank in sequence. In addition, the closed cooling water system is also provided with three closed cold water booster pumps for providing cooling water for the gas booster of the combined cycle unit.
After the whole set of unit group is completely stopped every time, the turbine lubricating oil pump needs to operate for 8-10 days, the lubricating oil system is stopped until the temperature of a turbine cylinder is reduced to below 50 ℃, during the operation of the lubricating oil pump, the heat which needs to be taken away by the whole combined cycle unit is little, the heat is about 8% of the heat of a normal operation working condition, a closed cooling water pump is still needed to continuously operate to cool the turbine lubricating oil system, and after the temperature of the closed cooling water is increased, a circulating water pump cooling oil system needs to be operated discontinuously, so that a large amount of station power is consumed. In addition, the distance from a circulating water pump room to a condenser main plant is about 1000 meters, the pipe diameter is 2800 millimeters, the circulating water pump belongs to a large-pipe-diameter long pipeline facility, the circulating water pump can generate a surge phenomenon when being started and stopped every time, the water hammer phenomenon can be generated due to improper control, the safe operation of a circulating water system is seriously threatened, the impact of frequent starting and stopping of the circulating water pump on a circulating pump motor and the circulating water system is large, the pressure of the circulating water system can tend to be stable after the circulating pump is stopped every time due to repeated fluctuation of the water hammer effect, and the pipeline and the valve of the circulating water system can be damaged after the circulating water pump is stopped for a long time.
Disclosure of Invention
The present specification provides a gas-steam combined cycle unit shutdown cooling device to overcome at least one technical problem in the prior art.
According to an embodiment of the present specification, there is provided a shutdown cooling device of a gas-steam combined cycle unit, including: the closed water expansion water tank, the closed water conveying pipeline, the two closed cooling water pumps, the plurality of closed cold water coolers, the closed cold water outlet main pipe, the booster pump inlet main pipe, the plurality of closed cold water booster pumps, the booster pump outlet main pipe, the closed cold water circulating pipeline, the closed cold water circulating cooler, the closed cold water conveying main pipe, the plurality of booster motor coolers, the closed cold water return main pipe, the communicating pipe, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the sixth control valve;
the closed water expansion water tank is communicated with the closed water conveying pipeline; the water inlet ends of the two closed cooling water pumps are respectively communicated with the closed water conveying pipeline; the water inlet ends of the closed cold water coolers are respectively communicated with the two closed cooling water pumps, and the water outlet ends of the closed cold water coolers are respectively communicated with the closed cold water outlet main pipe; the closed cold water outlet main pipe is communicated with a plurality of closed cold water users; one end of the booster pump inlet main pipe is communicated with the closed cold water outlet main pipe, and the other end of the booster pump inlet main pipe is respectively communicated with the water inlet ends of the closed cold water booster pumps; one end of the booster pump outlet main pipe is respectively communicated with the water outlet ends of the closed cold water booster pumps, and the other end of the booster pump outlet main pipe is communicated with one end of the closed cold water circulating pipeline; the other end of the closed cold water circulating pipeline is communicated with a booster pump inlet main pipe; the closed cold water circulating pipeline is sequentially provided with the fifth control valve, a closed cold water circulating cooler and a sixth control valve along the closed cold water conveying direction; the second control valve is arranged on the booster pump inlet main pipe between the closed cold water booster pump and the closed cold water circulating pipeline; one end of the cold water shut-off main pipe is communicated with the booster pump outlet main pipe, and the other end of the cold water shut-off main pipe is respectively communicated with the water inlet ends of the plurality of booster motor coolers; the third control valve is arranged on the closed cold water delivery main pipe; one end of the closed cold water return main pipe is respectively communicated with the water outlet ends of the coolers of the motor of the superchargers, and the other end of the closed cold water return main pipe is communicated with the closed water conveying pipeline; the fourth control valve is installed on the cold water return main pipe; a path of the communicating pipe is led out from the closed cold water return main pipe between the fourth control valve and the closed water conveying pipeline; the communicating pipe is communicated with the booster pump inlet main pipe; the first control valve is installed on the communicating pipe.
Preferably, the cooling water inlet end and the cooling water outlet end of the cold water closed circulation cooler are respectively communicated with the refrigerating station; a seventh control valve is arranged between the cooling water inlet end of the closed cold water circulating cooler and the refrigerating station; an eighth control valve is arranged between the cooling water outlet end of the closed cold water circulating cooler and the refrigerating station.
Preferably, the first control valve and the second control valve are both manual valves; and the third control valve and the fourth control valve are electrically operated valves.
Preferably, the closed water expansion tank is connected with a water replenishing pipeline for replenishing desalted water.
Preferably, the closed water conveying pipeline is communicated with a plurality of closed water users.
Preferably, a ninth control valve is arranged at the water inlet end of the closed cooling water pump.
Preferably, a tenth control valve and an eleventh control valve are arranged at the water outlet end of the closed cooling water pump.
Further preferably, the ninth control valve and the eleventh control valve are both electrically operated valves; the tenth control valve is a manual valve.
Preferably, the closed water conveying pipeline and the closed cold water outlet main pipe are respectively communicated with a plurality of closed cold pump motor coolers.
Preferably, the closed water conveying pipeline and the closed cold water outlet main pipe are respectively communicated with a steam turbine oil cooler.
By applying the embodiment of the specification and simple system transformation, the operation of the closed cold water booster pump can be used for providing closed cold water after the machine group is completely stopped, the problems that a closed cold water pump still needs to be continuously operated and a circulating water pump needs to be discontinuously operated during the operation of the lubricating oil pump in the prior art are solved, the service power can be saved, the economic benefit of a power plant is improved, and the repeated impact on a circulating pump motor and a circulating water system can be reduced.
The innovation points of the embodiment of the specification comprise:
1. the shutdown cooling device of the gas-steam combined cycle unit can realize that shutdown cold water is provided by using one shutdown cold water booster pump after the unit group is completely stopped, solves the problem that one shutdown cold water pump needs to be continuously operated and one circulating water pump needs to be discontinuously operated during the operation of a lubricating oil pump in the prior art, reduces the service power consumption, and improves the economic benefit of a power plant.
2. Repeated impact on the circulating pump motor and the circulating water system is reduced, the problem that the circulating pump frequently starts and stops large impact on the circulating pump motor and the circulating water system in the prior art is solved, and the service life of system equipment is prolonged.
3. The system is small in modification, simple in construction and low in cost.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a shutdown cooling device of a gas-steam combined cycle unit provided by an embodiment of the specification;
description of reference numerals: 1 is a closed water expansion water tank, 2 is a closed water conveying pipeline, 3 is a closed cooling water pump, 4 is a closed cold water cooler, 5 is a closed cold water outlet main pipe, 6 is a booster pump inlet main pipe, 7 is a closed cold water booster pump, 8 is a booster pump outlet main pipe, 9 is a closed cold water circulating pipeline, 10 is a closed cold water circulating cooler, 11 is a closed cold water conveying main pipe, 12 is a booster motor cooler, 13 is a closed cold water return main pipe, 14 is a communicating pipe, 15 is a first control valve, 16 is a second control valve, 17 is a third control valve, 18 is a fourth control valve, 19 is a fifth control valve, 20 is a sixth control valve, 21 is a seventh control valve, 22 is an eighth control valve, 23 is a water replenishing pipeline, 24 is a ninth control valve, 25 is a tenth control valve, 26 is an eleventh control valve, 27 is a closed cold pump motor cooler, 28 is a steam turbine oil cooler, 29 is a user of cooling water of the combustion engine, 30 is a user of cooling water of the steam turbine, and 31 is a user of cooling water of the air compressor.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present specification and the drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the specification discloses a shutdown cooling device of a gas-steam combined cycle unit. Fig. 1 is a schematic diagram illustrating a shutdown cooling device of a gas-steam combined cycle unit according to an embodiment of the present disclosure. The following are detailed below.
A closed water expansion water tank 1 in the shutdown cooling device of the gas-steam combined cycle unit is used as the pressure stabilization and buffering of a closed cooling water system. The closed water expansion tank 1 is communicated with the closed water conveying pipeline 2, and cooling water in the closed water expansion tank 1 is circulated through the closed water conveying pipeline 2. The medium of the cooling system in the embodiment of the present description is chemical demineralized water, and the closed water expansion tank 1 is connected with a water replenishing pipeline 23 for replenishing the demineralized water.
The shutdown cooling device is provided with two closed cooling water pumps 3, the water inlet ends of the two closed cooling water pumps 3 are respectively communicated with a closed water conveying pipeline 2, the water inlet ends of a plurality of closed cooling water coolers 4 are respectively communicated with the two closed cooling water pumps 3, and the water outlet ends are respectively communicated with a closed cooling water outlet main pipe 5. The cooling water of the closed cooling water system flows from the closed water expansion water tank 1 to the closed cooling water pump 3 and the closed cooling water cooler 4 in sequence.
The two closed cooling water pumps 3 are operated and equipped one by one, a ninth control valve 24 is arranged at the water inlet end of each closed cooling water pump 3, a tenth control valve 25 and an eleventh control valve 26 are arranged at the water outlet end of each closed cooling water pump 3, and the ninth control valve 24, the tenth control valve 25 and the eleventh control valve 26 are used for controlling the cooling water conveying of the two closed cooling water pumps 3 during operation or shutdown. Preferably, the ninth control valve 24 and the eleventh control valve 26 are both electrically operated valves, and the tenth control valve 25 is a manual valve. When the closed cooling water pump 3 is operated, the ninth control valve 24, the tenth control valve 25 and the eleventh control valve 26 before and after the closed cooling water pump 3 are opened, so that the cooling water in the closed water expansion tank 1 can be conveyed to the operated closed cooling water pump 3 through the closed water conveying pipeline 2.
The cooling water in the chilled water outlet header 5 flows to a plurality of chilled water booster pumps 7, a turbine oil cooler 28, a chilled water consumer, and a chilled pump motor cooler 27. The closed cold pump motor coolers 27 are respectively communicated with the closed water conveying pipeline 2 and the closed cold water outlet main pipe 5, the steam turbine oil coolers 28 are respectively communicated with the closed water conveying pipeline 2 and the closed cold water outlet main pipe 5, and the closed cold water users are also respectively communicated with the closed water conveying pipeline 2 and the closed cold water outlet main pipe 5. In the embodiment of the present specification, the cold shut-off water consumers include, but are not limited to, a plurality of engine cooling water consumers 29, turbine cooling water consumers 30, and air compressor cooling water consumers 31.
The water inlet ends of the closed cold water booster pumps 7 are respectively communicated with one end of a booster pump inlet main pipe 6, the water outlet ends are respectively communicated with one end of a booster pump outlet main pipe 8, the other end of the booster pump inlet main pipe 6 is communicated with a closed cold water outlet main pipe 5, and the booster pump outlet main pipe 8 leads out a closed cold water circulating pipeline 9 and a closed cold water delivery main pipe 11.
The other end of the closed cold water circulating pipeline 9 is communicated with the booster pump inlet main pipe 6, so that the water inlet end and the water outlet end of the closed cold water booster pump 7 are communicated through the closed cold water circulating pipeline 9. The closed cold water circulating pipeline 9 is sequentially provided with a fifth control valve 19, a closed cold water circulating cooler 10 and a sixth control valve 20 along the closed cold water conveying direction. The shutdown cooling device is additionally provided with a closed cold water circulating cooler 10, and the closed cold water circulating cooler 10 is used for further cooling the cooling water conveyed by the closed cold water booster pump 7, so that the purpose of providing closed cold water by the operation of one closed cold water booster pump 7 is realized, and the service power consumption is reduced. The flow of the cooling water in the closed cooling water circulation line 9 is controlled by the fifth control valve 19 and the sixth control valve 20.
A cooling water inlet end and a cooling water outlet end of the closed cooling water circulation cooler 10 are respectively communicated with a refrigeration station (not shown in the figure), a seventh control valve 21 is arranged between the cooling water inlet end of the closed cooling water circulation cooler 10 and the refrigeration station, and an eighth control valve 22 is arranged between the cooling water outlet end of the closed cooling water circulation cooler 10 and the refrigeration station. The closed cooling water circulation cooler 10 cools the cooling water generated by the refrigeration station, and controls the delivery of the cooling water of the refrigeration station by using the seventh control valve 21 and the eighth control valve 22, thereby controlling the refrigeration operation of the closed cooling water circulation cooler 10. In a specific implementation process, the refrigeration station can be a lithium bromide refrigeration station.
The water inlet ends of the motor coolers 12 of the plurality of superchargers are respectively communicated with the closed cold water delivery main pipe 11, and the water outlet ends are respectively communicated with the closed cold water return main pipe 13. A second control valve 16 is arranged on a booster pump inlet main pipe 6 between the closed cold water booster pump 7 and the closed cold water circulating pipeline 9; a third control valve 17 is arranged on the cold water-stopping and water-conveying main pipe 11; the closed cold water return main pipe 13 is communicated with the closed water conveying pipeline 2; a fourth control valve 18 is arranged on the cold water closing return main pipe 13; a closed cold water return main pipe 13 between the fourth control valve 18 and the closed water conveying pipeline 2 is led out of a communicating pipe 14; the communicating pipe 14 is communicated with the booster pump inlet main pipe 6; a first control valve 15 is mounted on the communicating pipe 14. In a specific embodiment, the first control valve 15 and the second control valve 16 are both manual valves, and the third control valve 17 and the fourth control valve 18 are both electric valves. The cooling water output by the cold water stopping booster pump 7 passes through a booster motor cooler 12 and is then conveyed into a cold water stopping return main pipe 13. The cooling water in the cold water shut-off return main pipe 13 can flow to the water inlet end of the cold water shut-off booster pump 7 through the communicating pipe 14.
In the shutdown cooling device, the flow direction of the cooling water is controlled by controlling the opening and closing of the first control valve 15, the second control valve 16, the third control valve 17, the fourth control valve 18, the fifth control valve 19, the sixth control valve 20, the seventh control valve 21 and the eighth control valve 22, and the modes are switched.
The components of the shutdown cooling device of the gas-steam combined cycle unit and the connection relationship between the components are described above, and the working principle of the shutdown cooling device of the gas-steam combined cycle unit is described in detail below with reference to fig. 1.
In this embodiment, when the system is in normal operation, the first control valve, the fifth control valve 19, the sixth control valve 20, the seventh control valve 21 and the eighth control valve 22 are closed, the third control valve 17 and the fourth control valve 18 are opened, the closed cooling water pump 3 operates, and the closed cooling water is pressurized by the closed cooling water booster pump 7, supplied to the booster motor cooler 12 for cooling water, and returned to the closed cooling water return main pipe 13.
After the machine group is completely stopped, the operation of the closed cooling water pump 3 is stopped, the modes are switched, the second control valve 16, the third control valve 17 and the fourth control valve 18 are closed, the first control valve 15, the fifth control valve 19, the sixth control valve 20, the seventh control valve 21 and the eighth control valve 22 are opened, one closed cooling water booster pump 7 is started, and one cooling water pump in the refrigeration station is started, so that the closed cooling water circulation cooler 10 can perform cooling operation. Cooling water in the closed water expansion water tank 1 flows to a closed cold water return main pipe 13 through a closed water conveying pipeline 2, flows to a water inlet end of a closed cold water booster pump 7 through a communicating pipe 14, flows to a closed cold water circulating cooler 10 through a closed cold water circulating pipeline 9 after passing through the closed cold water booster pump 7, is conveyed to a booster pump inlet main pipe 6 through the closed cold water circulating pipeline 9 after being cooled by the closed cold water circulating cooler 10, and is closed to a cold water outlet main pipe 5, and then the cooling water is conveyed to each user of closed cold water through the closed cold water outlet main pipe 5, so that the purpose of providing closed cold water through the operation of one closed cold water booster pump 7 is achieved.
After the system is transformed according to the shutdown cooling device, the oil system runs for 20 days after shutdown by taking three-phase full-shutdown maintenance for 2 times every year as an example. The closed cooling water pump is used for continuously operating, the circulating pump is started 3 times a day in winter, and the calculation is carried out for 1 hour each time, so that the power consumption of 710 multiplied by 24 multiplied by 20+1250 multiplied by 3 multiplied by 20- (30+90) × 24 multiplied by 20 is saved, the power consumption is reduced to 30 ten thousand yuan, and the economic benefit of the power plant is improved. In addition, because the circulating water pump frequently opens and stops and to the impact ratio of circulating pump motor and circulating water system great, circulating water system's pressure can only tend to stable after the repeated fluctuation of water hammer effect for a plurality of times after the circulating pump is stopped at every turn, can cause circulating water system pipeline and valve to damage for a long time, and this shut down cooling device has reduced the repeated impact to circulating pump motor and circulating water system, has improved the life of equipment.
To sum up, the specification discloses a shutdown cooling device for a gas-steam combined cycle unit, which adopts simple system transformation, can realize that a closed cold water booster pump is used for providing closed cold water after a unit group is completely stopped, solves the problem that a closed cold water pump still needs to be continuously operated and a circulating water pump needs to be discontinuously operated during the operation of a lubricating oil pump in the prior art, can save station power, improve the economic benefit of a power plant, and can reduce repeated impact on a circulating pump motor and a circulating water system.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (10)
1. A shutdown cooling device for a gas-steam combined cycle plant, the shutdown cooling device comprising: the closed water expansion water tank, the closed water conveying pipeline, the two closed cooling water pumps, the plurality of closed cold water coolers, the closed cold water outlet main pipe, the booster pump inlet main pipe, the plurality of closed cold water booster pumps, the booster pump outlet main pipe, the closed cold water circulating pipeline, the closed cold water circulating cooler, the closed cold water conveying main pipe, the plurality of booster motor coolers, the closed cold water return main pipe, the communicating pipe, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the sixth control valve;
the closed water expansion water tank is communicated with the closed water conveying pipeline; the water inlet ends of the two closed cooling water pumps are respectively communicated with the closed water conveying pipeline; the water inlet ends of the closed cold water coolers are respectively communicated with the two closed cooling water pumps, and the water outlet ends of the closed cold water coolers are respectively communicated with the closed cold water outlet main pipe; the closed cold water outlet main pipe is communicated with a plurality of closed cold water users; one end of the booster pump inlet main pipe is communicated with the closed cold water outlet main pipe, and the other end of the booster pump inlet main pipe is respectively communicated with the water inlet ends of the closed cold water booster pumps; one end of the booster pump outlet main pipe is respectively communicated with the water outlet ends of the closed cold water booster pumps, and the other end of the booster pump outlet main pipe is communicated with one end of the closed cold water circulating pipeline; the other end of the closed cold water circulating pipeline is communicated with a booster pump inlet main pipe; the closed cold water circulating pipeline is sequentially provided with the fifth control valve, a closed cold water circulating cooler and a sixth control valve along the closed cold water conveying direction; the second control valve is arranged on the booster pump inlet main pipe between the closed cold water booster pump and the closed cold water circulating pipeline; one end of the cold water shut-off main pipe is communicated with the booster pump outlet main pipe, and the other end of the cold water shut-off main pipe is respectively communicated with the water inlet ends of the plurality of booster motor coolers; the third control valve is arranged on the closed cold water delivery main pipe; one end of the closed cold water return main pipe is respectively communicated with the water outlet ends of the coolers of the motor of the superchargers, and the other end of the closed cold water return main pipe is communicated with the closed water conveying pipeline; the fourth control valve is installed on the cold water return main pipe; a path of the communicating pipe is led out from the closed cold water return main pipe between the fourth control valve and the closed water conveying pipeline; the communicating pipe is communicated with the booster pump inlet main pipe; the first control valve is installed on the communicating pipe.
2. The shutdown cooling device of the gas-steam combined cycle unit according to claim 1, wherein a cooling water inlet end and a cooling water outlet end of the closed cold water circulating cooler are respectively communicated with a refrigeration station; a seventh control valve is arranged between the cooling water inlet end of the closed cold water circulating cooler and the refrigerating station; an eighth control valve is arranged between the cooling water outlet end of the closed cold water circulating cooler and the refrigerating station.
3. The shutdown cooling device of the gas-steam combined cycle unit according to claim 1, wherein the first control valve and the second control valve are both manual valves; and the third control valve and the fourth control valve are electrically operated valves.
4. The shutdown cooling device of the gas-steam combined cycle unit as recited in claim 1, wherein a water replenishing pipeline for replenishing demineralized water is connected to the closed water expansion tank.
5. The shutdown cooling device of a gas-steam combined cycle unit according to claim 1, wherein the closed water delivery conduit is in communication with a plurality of the closed water users.
6. The shutdown cooling device of the gas-steam combined cycle unit as claimed in claim 1, wherein a ninth control valve is provided at a water inlet end of the closed cooling water pump.
7. The shutdown cooling device of the gas-steam combined cycle unit according to claim 6, wherein a tenth control valve and an eleventh control valve are arranged at a water outlet end of the closed cooling water pump.
8. The shutdown cooling device of the gas-steam combined cycle unit of claim 7, wherein the ninth control valve and the eleventh control valve are both electrically operated valves; the tenth control valve is a manual valve.
9. The shutdown cooling device of the gas-steam combined cycle unit as recited in claim 1, wherein the closed water delivery pipeline and the closed cold water outlet main pipe are respectively communicated with a plurality of closed cold pump motor coolers.
10. The shutdown cooling device of the gas-steam combined cycle unit according to claim 1, wherein the closed water delivery pipeline and the closed cold water outlet main pipe are respectively communicated with a steam turbine oil cooler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120997241.3U CN214944581U (en) | 2021-05-11 | 2021-05-11 | Shutdown cooling device of gas-steam combined cycle unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120997241.3U CN214944581U (en) | 2021-05-11 | 2021-05-11 | Shutdown cooling device of gas-steam combined cycle unit |
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| CN214944581U true CN214944581U (en) | 2021-11-30 |
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