CN115387910A - Cooling water system for cooling air of turbine of gas turbine - Google Patents
Cooling water system for cooling air of turbine of gas turbine Download PDFInfo
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- CN115387910A CN115387910A CN202110568970.1A CN202110568970A CN115387910A CN 115387910 A CN115387910 A CN 115387910A CN 202110568970 A CN202110568970 A CN 202110568970A CN 115387910 A CN115387910 A CN 115387910A
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- 239000000498 cooling water Substances 0.000 title claims abstract description 43
- 238000001816 cooling Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 321
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000004064 recycling Methods 0.000 claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 29
- 230000001276 controlling effect Effects 0.000 description 13
- 230000001105 regulatory effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000003134 recirculating effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/16—Cooling of plants characterised by cooling medium
- F02C7/18—Cooling of plants characterised by cooling medium the medium being gaseous, e.g. air
- F02C7/185—Cooling means for reducing the temperature of the cooling air or gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
- F01K9/003—Plants characterised by condensers arranged or modified to co-operate with the engines condenser cooling circuits
Abstract
The embodiment of the invention provides a cooling water system for cooling air of a turbine of a gas turbine, wherein the water inlet end of a condensed water heater in the cooling water system is connected with one end of a condensed water main pipe; one end of the low-pressure water delivery pipe is communicated with the water outlet end of the condensed water heater; the other end of the low-pressure water delivery pipe is communicated with the water inlet end of the low-pressure steam pocket; a circulating water inlet pipe is led out from the low-pressure water delivery pipe; the TCA cooler is arranged on the circulating water inlet pipe, and the water inlet end of the TCA cooler is communicated with the water outlet end of the condensed water heater; the water-water heat exchanger is connected with the TCA cooler in series; the water inlet end of the condensed water recycling pump set is communicated with the water outlet end of the water-water heat exchanger; a heater return pipe communicated with the water inlet end of the condensed water heater is led out from the water outlet end of the condensed water recycling pump set; the water outlet end of the condensed water recycling pump set leads out another path of low-pressure steam drum water return pipe communicated with the water inlet end of the low-pressure steam drum; one end of the first communicating pipe is communicated with the water inlet end of the TCA cooler, and the other end of the first communicating pipe is communicated with the water return pipe of the heater.
Description
Technical Field
The invention relates to the technical field of gas turbines, in particular to a cooling water system for cooling air of a turbine of a gas turbine.
Background
The gas turbine is an internal combustion type power machine which takes continuously flowing gas as a working medium and drives an impeller to rotate at a high speed to convert the energy of fuel into useful work, and is a rotary impeller type heat engine. The Cooling Air of the Turbine rotor and the moving blades of the gas Turbine is exhausted from a compressor, and the exhaust gas of the compressor is cooled and filtered by a TCA cooler and then used for Cooling the Turbine moving blades of the first three stages, the rotor disc and the fourth stage rotor disc. The cooling effect of the TCA cooler has a very important role since it directly affects the safe operation of the gas turbine and the output of the gas turbine.
In the prior art, cooling water of a TCA system comes from a high-pressure feed pump outlet main pipe in front of a high-pressure water supply regulating valve of a boiler, the high-pressure feed water enters a cooler for heat exchange after passing through two water supply valves, and TCA return water returns to a high-pressure steam drum or a condenser through a pneumatic regulating valve. Because the TCA water supply line is arranged in front of the high-pressure water supply valve, the TCA flow can be influenced by the high-pressure water supply valve. And because the TCA cooler is arranged in the high-pressure system, the whole pressure of the piping system of the high-pressure system is high, the front-back pressure difference of the TCA backwater adjusting valve is larger, especially during the starting period or the low-load period, at the moment, the TCA cooler backwaters to the condenser, the front-back pressure difference of the adjusting valve is large, the pressure drop after the valve can cause the valve body to be washed, along with the operation of the unit, the leakage flow of the valve is serious, the automatic control failure is easy to cause, and the safety of the unit is threatened.
Disclosure of Invention
The present specification provides a cooling water system for cooling air for a turbine of a combustion engine that overcomes at least one of the problems of the prior art.
According to an embodiment of the present specification, there is provided a cooling water system for cooling air for a turbine of an internal combustion engine, the cooling water system including:
the water inlet end of the condensed water heater is connected with one end of the condensed water main pipe;
one end of the low-pressure water conveying pipe is communicated with the water outlet end of the condensed water heater;
the other end of the low-pressure water delivery pipe is communicated with the water inlet end of the low-pressure steam drum;
the first valve group is arranged on the low-pressure water conveying pipe;
the circulating water inlet pipe is led out from the low-pressure water conveying pipe between the first valve group and the condensed water heater;
the TCA cooler is arranged on the circulating water inlet pipe, and the water inlet end of the TCA cooler is communicated with the water outlet end of the condensed water heater;
the water-water heat exchanger is arranged on the circulating water inlet pipe, and the water inlet end of the water-water heat exchanger is communicated with the water outlet end of the TCA cooler;
a first electrically operated valve disposed on the circulating inlet pipe between the TCA cooler and the water-water heat exchanger;
the first electric adjusting valve is arranged on the circulating water inlet pipe between the first electric valve and the water-water heat exchanger;
a water inlet end of the condensed water recycling pump set is communicated with a water outlet end of the water-water heat exchanger;
the second electric valve is arranged on the circulating water inlet pipe between the water-water heat exchanger and the condensed water recycling pump set;
the first check valve is arranged on the circulating water inlet pipe between the second electric valve and the condensed water recycling pump set;
the water outlet end of the condensed water recirculation pump set leads out a heater water return pipe communicated with the water inlet end of the condensed water heater;
the second valve group is arranged on the heater water return pipe;
the water outlet end of the condensed water recycling pump set leads out another path of low-drum water return pipe communicated with the water inlet end of the low-pressure steam drum;
the third valve group is arranged on the low-packet water return pipe;
one end of the first communication pipe is communicated with the water inlet end of the TCA cooler, and the other end of the first communication pipe is communicated with the heater water return pipe between the second valve group and the condensed water recirculation pump group;
the first normally closed electric valve is arranged on the first communication pipe;
the second check valve is arranged on the first communication pipe between the first normally closed electric valve and the TCA cooler, and the water outlet end of the second check valve is communicated with the water inlet end of the TCA cooler.
Preferably, the first valve group comprises a third electric valve, a second electric adjusting valve and a first manual valve which are sequentially arranged along the water flow direction.
Preferably, the cooling water system further comprises a fourth valve group; the fourth valve group is connected with the first valve group in parallel; the fourth valve group comprises a second normally closed electric valve and a second manual valve which are sequentially arranged along the water flow direction.
Preferably, the cooling water system further comprises a second communicating pipe and a fourth electric valve; one end of the second communicating pipe is communicated with the circulating water inlet pipe between the first electric valve and the TCA cooler, and the other end of the second communicating pipe is communicated with the circulating water inlet pipe between the first check valve and the condensate water recycling pump set; the fourth electrically operated valve is provided on the second communication pipe.
Preferably, the condensate water recycling pump group comprises a plurality of condensate water recycling pumps, a third manual valve, a third check valve and a fifth electric valve; the water inlet end of each condensate water recirculation pump is provided with the third manual valve; and the water outlet end of each condensate water recirculation pump is provided with the third check valve and the fifth electric valve.
Preferably, the second valve group comprises a third electric adjusting valve and a fourth manual valve; the third electric adjusting valve is arranged on the water return pipe of the heater; the fourth manual valve is arranged on the heater water return pipe between the third electric control valve and the condensed water heater.
Preferably, the third valve group comprises a fourth electric regulating valve and a fifth manual valve; the fourth electric adjusting valve is arranged on the low-package water return pipe; the fifth manual valve is arranged on the low-package water return pipe between the condensed water recirculation pump group and the fourth electric adjusting valve.
Preferably, the cooling water system further comprises a condenser, a condensed water pump set and a sixth electric valve; the water inlet end of the condensed water pump set is communicated with the water outlet end of the condenser; the water outlet end of the condensed water pump group is connected with the other end of the condensed water main pipe; and a sixth electric valve is arranged on the condensed water main pipe.
More preferably, the condensate pump group includes a plurality of condensate pumps, a seventh electric valve, a fourth check valve, a pressure reducing valve, and an eighth electric valve; the water inlet end of each condensate pump is provided with the pressure reducing valve and the eighth electric valve; and the water outlet end of each condensate pump is provided with the fourth check valve and the seventh electric valve.
Still more preferably, the first motor-operated valve, the second motor-operated valve, the third motor-operated valve, the fourth motor-operated valve, the fifth motor-operated valve, the sixth motor-operated valve, the seventh motor-operated valve, and the eighth motor-operated valve are all electrically-operated shutoff valves.
By applying the embodiment of the specification, the TCA cooler is arranged in the low-pressure system and is arranged behind the condensed water heater and is connected with the water-water heat exchanger in series, the condensed water flows through the TCA cooler, the water-water heat exchanger and the condensed water recirculation pump in sequence, one path of the condensed water returns to the inlet of the condensed water heater, and the other path of the condensed water returns to the low-pressure steam pocket through the throttle valve, so that the operation requirement of the unit can be met, the problem that the TCA cooler is arranged in the high-pressure system in the prior art can be solved, the flow of the TCA cooler is not influenced by the water supply throttle valve any more, the risk of tripping of the unit due to low flow of the TCA cooler is reduced, and the safety coefficient of the whole unit is improved.
According to the cooling water system, the TCA cooler is arranged in the low-pressure system, on one hand, the whole pressure of the TCA cooling water pipe system is low, the pipe system is not easy to cause vibration, and the automatic control of the TCA return water throttle is more stable and reliable; on the other hand, the unit does not need to arrange a condensed water pipeline at the inlet of the high-pressure water feed pump any more, so that the complexity of the system is reduced, the load of the high-pressure water feed pump is reduced, and a certain energy-saving effect is achieved. Meanwhile, closed-loop control can be realized on the flow rate of TCA cooling water, and the heat of the TCA cooler is taken away by the water-water heat exchanger, so that the heat supply capacity of the water-water heat exchanger is improved, and the heat supply capacity of the water-water heat exchanger during low load of the combustion engine is further ensured. In addition, when the combustion engine is started, the flow and the temperature of the TCA system can meet the starting conditions more quickly, so that the starting time of the combustion engine can be shortened, and the efficiency of the combustion engine is improved.
The innovation points of the embodiment of the specification comprise:
1. in the embodiment, the TCA cooler is arranged in the low-pressure system, the flow of the TCA cooler is not influenced by the water supply throttle any more, the risk of tripping of the unit due to low flow of the TCA cooler is reduced, the integral safety factor of the unit is improved, and the unit runs more safely.
2. In the embodiment, the TCA cooler is arranged in the low-pressure system, the whole pressure of the TCA cooling water pipe system is low, the pipe system is not easy to cause vibration, and the automatic control of the TCA return water adjusting valve is more stable and reliable.
3. In this embodiment, the TCA cooling water flow rate can be closed-loop controlled.
4. In the embodiment, the heat of the TCA cooler is taken away by the water-water heat exchanger, so that the heat supply capacity of the water-water heat exchanger is improved, and the heat supply capacity of the water-water heat exchanger at the low load of the combustion engine is further ensured.
5. In the embodiment, when the combustion engine is started, the flow and the temperature of the TCA system can meet the starting conditions more quickly, so that the starting time of the combustion engine can be shortened, and the efficiency of the combustion engine can be improved.
6. In the embodiment, the TCA cooler is arranged in the low-pressure system, a condensed water pipeline does not need to be arranged at the inlet of the high-pressure feed water pump, the complexity of the system is reduced, the load of the high-pressure feed water pump is reduced, and a certain energy-saving effect is achieved.
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 diagram of a cooling water system for cooling air of a turbine of a combustion engine according to an embodiment of the present disclosure;
description of reference numerals: the system comprises a condensate water heater 1, a condensate water header 2, a low-pressure water pipe 3, a low-pressure steam drum 4, a circulating water inlet pipe 5, a TCA cooler 6, a water-water heat exchanger 7, a first electric valve 8, a first electric control valve 9, a first electric control valve 10, a second electric control valve 11, a first check valve 12, a heater return pipe 13, a low-package return pipe 13, a first communication pipe 14, a first normally closed electric valve 15, a second check valve 16, a third electric valve 17, a second electric control valve 18, a first manual valve 19, a second normally closed electric valve 20, a second manual valve 21, a second communication pipe 22, a fourth electric control valve 23, a condensate water recycling manual pump 24, a third electric control valve 25, a third check valve 26, a fifth electric control valve 27, a third electric control valve 28, a third electric control valve 29, a fourth manual control valve 30, a fourth electric control valve 31, a fifth manual valve 32, a condenser 33, a sixth electric control valve 34, a seventh electric control valve 35, a fourth electric control valve 36, a fourth electric control valve 37, a fourth electric control valve 38, an eighth electric control valve 38, and a third electric control valve 38.
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 a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the 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 cooling water system for cooling air of a turbine of a combustion engine. Fig. 1 is a cooling water system for cooling air of a turbine of an internal combustion engine according to an embodiment of the present disclosure, which will be described in detail below with reference to fig. 1.
According to the cooling water system for cooling air of the turbine of the combustion engine, the TCA cooler 6 is arranged in a low-pressure system, the TCA cooler 6 is arranged behind the condensed water heater 1 and is connected with the water-water heat exchanger 7 in series, condensed water flows through the TCA cooler 6, the water-water heat exchanger 7 and the condensed water recirculation pump 24 in sequence, one path of the condensed water returns to the inlet of the condensed water heater 1, and the other path of the condensed water returns to the low-pressure steam pocket 4 through the third valve group.
Specifically, this cooling water system's cooling water source is mainly supplied with by condenser 32, carries through the female pipe of condensate 2, and wherein, for the homoenergetic normal transport of condensate under guaranteeing every operating mode, condenser 32's play water end is provided with the condensate pump package for improve the conveying efficiency of condensate, guarantee the normal operating of condensate transport operation, under the effect of condensate pump package, the condensate carries through the female pipe of condensate 2. Furthermore, a sixth electric valve 33 is arranged on the condensate header pipe 2, and the sixth electric valve 33 is preferably an electric stop valve and is used for controlling the communication and the shutoff of the condensate header pipe 2 and further controlling the delivery of the condensate according to the requirements.
In a specific embodiment the condensate pump group comprises a plurality of condensate pumps 34, a seventh electric valve 35, a fourth check valve 36, a pressure reducing valve 37, an eighth electric valve 38. The water inlet end of each condensate pump 34 is provided with a pressure reducing valve 37 and an eighth electric valve 38, and the water outlet end of each condensate pump 34 is provided with a fourth check valve 36 and a seventh electric valve 35. The fourth check valve 36 is used for preventing the backflow of the condensed water, so that the operation safety of the unit is improved, and the service life of the condensed water pump 34 is prolonged. The pressure reducing valve 37 is used for reducing the pressure of the condensed water supplied by the condenser 32, so that the outlet pressure of the condensed water is automatically kept stable, and the condensed water conveyed by the condensed water pump 34 is ensured to be suitable for the low-pressure system environment. The seventh electric valve 35 and the eighth electric valve 38 are preferably electric stop valves, the eighth electric valve 38 is used as a water inlet valve of the condensate pump 34 and is used for controlling the communication or the closing of the condensate pump 34 and the condenser 32, the seventh electric valve 35 is used as a water outlet valve of the condensate pump 34 and is used for controlling the communication or the closing of the condensate pump 34 and the condensate main pipe 2, and the number of the condensate pumps 34 for operation is controlled according to the unit working condition requirements, so that the delivery capacity of the condensate is controlled.
The water inlet end of the condensate heater 1 is connected with one end of the condensate main pipe 2, the water outlet end is communicated with one end of the low-pressure water conveying pipe 3 and is communicated with the water inlet end of the low-pressure steam pocket 4 through the low-pressure water conveying pipe 3, so that the condensate conveyed by the condensate pump 34 is heated by the condensate heater 1 and then conveyed into the low-pressure steam pocket 4 through the low-pressure water conveying pipe 3. In order to control the flow of the condensed water of the low-pressure water pipe 3, a first valve group is arranged on the low-pressure water pipe 3. Furthermore, the first valve group comprises a third electric valve 17, a second electric regulating valve 18 and a first manual valve 19 which are sequentially arranged along the water flow direction, the third electric valve 17 is preferably an electric stop valve, the third electric valve 17 is used for automatically controlling the connection and disconnection of the low-pressure water conveying pipe 3, the first manual valve 19 is used for manually controlling the connection and disconnection of the low-pressure water conveying pipe 3, the third electric valve 17 and the first manual valve 19 are used for dually controlling the condensate water conveying of the low-pressure water conveying pipe 3, the operation is safer and more reliable, the second electric regulating valve 18 is used for regulating the water flow of the low-pressure water conveying pipe 3, the accurate regulation is 0-100%, the water inflow of the low-pressure steam pocket 4 can be effectively controlled, and the automation is strong.
In a specific implementation process, in order to ensure normal water supply of the low-pressure steam pocket 4, the cooling water system of this embodiment is further provided with a fourth valve group connected in parallel with the first valve group, specifically, the fourth valve group includes a second normally closed electric valve 20 and a second manual valve 21 which are sequentially arranged along a water flow direction, when the first valve group is in normal operation, the second normally closed electric valve 20 is in a closed state, and when the first valve group is abnormal, the second normally closed electric valve 20 is opened, and condensed water is conveyed into the low-pressure steam pocket 4 through the fourth valve group. At the same time, the delivery of condensate is manually controlled by means of the second manual valve 21 to supply the low-pressure drum 4 with condensate on demand.
In the embodiment of the specification, a path of circulating water inlet pipe 5 is led out from the low-pressure water delivery pipe 3 between the first valve group and the condensed water heater 1, the TCA cooler 6 is arranged on the circulating water inlet pipe 5, and the water inlet end of the TCA cooler 6 is communicated with the water outlet end of the condensed water heater 1; the water-water heat exchanger 7 is arranged on the circulating water inlet pipe 5, the water inlet end of the water-water heat exchanger 7 is communicated with the water outlet end of the TCA cooler 6, and the water outlet end is communicated with the water inlet end of the condensed water recycling pump set. The TCA cooler 6 and the water-water heat exchanger 7 are connected in series through the low-pressure water delivery pipe 3, so that the condensed water primarily heated by the condensed water heater 1 can be supplied to the TCA cooler 6 and the water-water heat exchanger 7. In order to realize the control of the flow of the condensed water between the TCA cooler 6 and the water-water heat exchanger 7 and between the water-water heat exchanger 7 and the condensed water recycling pump set, a first electric valve 8 and a first electric adjusting valve 9 are arranged between the TCA cooler 6 and the water-water heat exchanger 7, and a second electric valve 10 and a first check valve 11 are arranged between the water-water heat exchanger 7 and the condensed water recycling pump set. In detail, the first electric valve 8 is arranged on the circulating water inlet pipe 5 between the TCA cooler 6 and the water-water heat exchanger 7, the first electric valve 8 is used for automatically controlling the communication or the closing between the TCA cooler 6 and the water-water heat exchanger 7, so that the condensed water is controlled to enter the water-water heat exchanger 7 from the TCA cooler 6 according to the requirement, the first electric regulating valve 9 is arranged on the circulating water inlet pipe 5 between the first electric valve 8 and the water-water heat exchanger 7, and the water flow entering the water-water heat exchanger 7 from the TCA cooler 6 is accurately regulated and controlled by the first electric regulating valve 9. The second electric valve 10 is arranged on the circulating water inlet pipe 5 between the water-water heat exchanger 7 and the condensate water recycling pump set, the second electric valve 10 is used for automatically controlling the communication or the shutoff between the water-water heat exchanger 7 and the condensate water recycling pump set, the condensate water is controlled to flow into the condensate water recycling pump set from the water-water heat exchanger 7 according to the requirement, and the first check valve 11 is arranged on the circulating water inlet pipe 5 between the second electric valve 10 and the condensate water recycling pump set to prevent water backflow and ensure the operation safety of the unit equipment.
The cooling water system in this embodiment is further provided with a second communication pipe 22, one end of the second communication pipe 22 is communicated with the circulating water inlet pipe 5 between the first electric valve 8 and the TCA cooler 6, the other end of the second communication pipe 22 is communicated with the circulating water inlet pipe 5 between the first check valve 11 and the condensate recirculating pump group, and the second communication pipe 22 is provided with a fourth electric valve 23. Therefore, the water outlet of the TCA cooler 6 can be directly conveyed through the condensed water recirculation pump 24 in the condensed water recirculation pump set by using the second communicating pipe 22, and the communication or the disconnection of the second communicating pipe 22 is automatically controlled through the fourth electric valve 23, so that the water outlet of the TCA cooler 6 is conveyed to the water-water heat exchanger 7 or the condensed water recirculation pump 24 according to the requirement.
In another specific embodiment, the condensate recirculating pump set comprises a plurality of condensate recirculating pumps 24, a third manual valve 25, a third check valve 26 and a fifth electric valve 27. The water inlet end of each condensate recirculation pump 24 is provided with a third manual valve 25, the water inlet of the condensate recirculation pump 24 is manually controlled by the third manual valve 25, the water outlet end of each condensate recirculation pump 24 is provided with a third check valve 26 and a fifth electric valve 27, the third check valve 26 is used for preventing the water outlet of the condensate recirculation pump 24 from flowing reversely, the service life of the device is prolonged, the operation safety of the unit is improved, and preferably, the fifth electric valve 27 is an electric check valve and is used for automatically controlling the connection or the closing of the water outlet of the condensate recirculation pump 24.
In the embodiment of the specification, two paths are led out from the water outlet end of the condensed water recycling pump group, one path is a heater return pipe 12 communicated with the water inlet end of the condensed water heater 1, and the other path is a low-pressure steam pocket return pipe 13 communicated with the water inlet end of the low-pressure steam pocket 4, so that the condensed water is circulated.
Wherein, in order to control the circulation of the condensed water, a second valve group is provided on the heater return pipe 12, and a third valve group is provided on the low-packet return pipe 13. In detail, the second valve group comprises a third electric control valve 28 and a fourth manual valve 29, the third electric control valve 28 is arranged on the heater water return pipe 12, the third electric control valve 28 is used for accurately controlling the flow rate of the condensed water circulated to the inlet of the condensed water heater 1 by the condensed water recirculation pump 24, the temperature of the inlet of the condensed water heater 1 is adjusted to be not lower than a specified value, the fourth manual valve 29 is arranged on the heater water return pipe 12 between the third electric control valve 28 and the condensed water heater 1, the communication or the closing between the condensed water recirculation pump 24 and the condensed water heater 1 is manually controlled by the fourth manual valve 29, and then the condensed water is controlled to enter the condensed water heater 1 from the condensed water recirculation pump 24. The third valve group comprises a fourth electric adjusting valve 30 and a fifth manual valve 31, the fourth electric adjusting valve 30 is arranged on the low-pressure steam pocket water return pipe 13, the fourth electric adjusting valve 30 is used for accurately adjusting and controlling the flow of the condensate water circulated to the low-pressure steam pocket 4 by the condensate water recirculation pump 24, the accurate adjustment of 0-100% can be realized, the fifth manual valve 31 is arranged on the low-pressure steam pocket water return pipe 13 between the condensate water recirculation pump group and the fourth electric adjusting valve 30, the fifth manual valve 31 can be used for manually controlling the communication or the disconnection between the condensate water recirculation pump 24 and the low-pressure steam pocket 4, and then the condensate water is conveyed to the low-pressure steam pocket 4 through the condensate water recirculation pump 24 according to requirements.
In addition, the cooling water system is also provided with a first communication pipe 14, specifically, one end of the first communication pipe 14 is communicated with the water inlet end of the TCA cooler 6, and the other end is communicated with a heater water return pipe 12 between the second valve group and the condensed water recirculation pump group; the first normally closed electric valve 15 is arranged on the first communicating pipe 14; the second check valve 16 is disposed on the first communication pipe 14 between the first normally closed electric valve 15 and the TCA cooler 6, and a water outlet end of the second check valve 16 is communicated with a water inlet end of the TCA cooler 6. Therefore, the condensed water delivered by the condensed water pump 34 is directly delivered to the TCA cooler 6 through the first communication pipe 14, and the second check valve 16 is used for preventing the condensed water in the first communication pipe 14 from flowing reversely, so that the one-way flow of the condensed water in the first communication pipe 14 is ensured, and the system safety is improved. The normally closed valve 15 is normally closed and when the condensate pump 34 is to be fed directly to the TCA cooler 6, the normally closed valve 15 is opened to allow the condensate to be fed directly to the TCA cooler 6.
The connection relationship between the components of the cooling water system for turbine cooling air of a combustion engine provided in the present embodiment and the components has been described above, and the operation principle of the cooling water system for turbine cooling air of a combustion engine will be described in detail with reference to fig. 1.
In the illustrated embodiment, before the engine is started, the condensate recirculation pump 24 is started, the frequency conversion is increased, and the TCA flow is established. After the combustion engine is started, the high-temperature condensed water flowing through the TCA cooler 6 is subjected to sufficient heat exchange with the water-water heat exchanger 7, heat is taken away, the heat supply capacity of the water-water heat exchanger 7 is improved, then the outlet of the condensed water recirculation pump 24 is divided into two paths, one path returns to the inlet of the condensed water heater 1, and at the moment, the third electric regulating valve 28 automatically operates to regulate the inlet temperature of the condensed water heater 1 to be not lower than a specified value; the other path of the low-pressure steam drum 4 is returned to ensure the TCA flow demand of the combustion engine under any load, and simultaneously, the water-water heat exchanger 7 can also supply heat to a certain extent.
To sum up, this specification discloses a cooling water system of combustion engine turbine cooling air, arrange the TCA cooler at low pressure system, set up behind the condensate water heater, establish ties with water-water heat exchanger, the condensate water flows through the TCA cooler in proper order, water-water heat exchanger, behind the condensate water recirculation pump, returns all the way to the condensate water heater entry, another way returns to the low pressure steam pocket through the accent door, can satisfy the operation demand of unit, can solve the produced problem of TCA cooler arrangement at high pressure system among the prior art again, and make TCA cooler flow no longer receive the water and transfer the influence, reduced because the risk of the low unit tripping operation of TCA cooler flow, improved the holistic factor of safety of unit.
According to the cooling water system, the TCA cooler is arranged in the low-pressure system, on one hand, the whole pressure of the TCA cooling water pipe system is low, the pipe system is not easy to cause vibration, and the automatic control of the TCA return water throttle is more stable and reliable; on the other hand, the unit does not need to arrange a condensed water pipeline at the inlet of the high-pressure water feed pump any more, so that the complexity of the system is reduced, the load of the high-pressure water feed pump is reduced, and a certain energy-saving effect is achieved. Meanwhile, closed-loop control can be realized on the flow rate of TCA cooling water, and the heat of the TCA cooler is taken away by the water-water heat exchanger, so that the heat supply capacity of the water-water heat exchanger is improved, and the heat supply capacity of the water-water heat exchanger during low load of the combustion engine is further ensured. In addition, when the combustion engine is started, the flow and the temperature of the TCA system can meet the starting conditions more quickly, so that the starting time of the combustion engine can be shortened, and the efficiency of the combustion engine is improved.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes shown 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 examples are only intended to illustrate the technical solution of the present invention, but 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 of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A cooling water system for cooling air for a turbine of a combustion engine, said cooling water system comprising:
the water inlet end of the condensed water heater is connected with one end of the condensed water main pipe;
one end of the low-pressure water conveying pipe is communicated with the water outlet end of the condensed water heater;
the other end of the low-pressure water delivery pipe is communicated with the water inlet end of the low-pressure steam drum;
the first valve group is arranged on the low-pressure water conveying pipe;
the circulating water inlet pipe is led out from the low-pressure water conveying pipe between the first valve group and the condensed water heater;
the TCA cooler is arranged on the circulating water inlet pipe, and the water inlet end of the TCA cooler is communicated with the water outlet end of the condensed water heater;
the water-water heat exchanger is arranged on the circulating water inlet pipe, and the water inlet end of the water-water heat exchanger is communicated with the water outlet end of the TCA cooler;
a first electric valve disposed on the circulation water inlet pipe between the TCA cooler and the water-water heat exchanger;
the first electric adjusting valve is arranged on the circulating water inlet pipe between the first electric valve and the water-water heat exchanger;
a water inlet end of the condensed water recycling pump set is communicated with a water outlet end of the water-water heat exchanger;
the second electric valve is arranged on the circulating water inlet pipe between the water-water heat exchanger and the condensed water recycling pump set;
the first check valve is arranged on the circulating water inlet pipe between the second electric valve and the condensed water recycling pump set;
the water outlet end of the condensed water recycling pump set leads out a heater water return pipe which is communicated with the water inlet end of the condensed water heater;
the second valve group is arranged on the heater water return pipe;
the water outlet end of the condensed water recirculation pump set is led out of the other path of the low-drum water return pipe communicated with the water inlet end of the low-pressure steam drum;
the third valve group is arranged on the low-packet water return pipe;
one end of the first communication pipe is communicated with the water inlet end of the TCA cooler, and the other end of the first communication pipe is communicated with the heater water return pipe between the second valve group and the condensed water recirculation pump group;
the first normally closed electric valve is arranged on the first communication pipe;
the second check valve, the second check valve set up in first normally closed motorised valve with between the TCA cooler on the first connecting pipe, just the water outlet end of second check valve with the end of intaking of TCA cooler is linked together.
2. A cooling water system for cooling air of a turbine of an internal combustion engine as claimed in claim 1, wherein said first valve set includes a third electric valve, a second electric control valve, and a first manual valve which are sequentially arranged along a water flow direction.
3. A cooling water system for cooling air for a turbine of a combustion engine as set forth in claim 1, further comprising a fourth valve group; the fourth valve group is connected with the first valve group in parallel; the fourth valve group comprises a second normally closed electric valve and a second manual valve which are sequentially arranged along the water flow direction.
4. A cooling water system for cooling air of a combustion engine turbine according to claim 1, further comprising a second connection pipe, a fourth electric valve; one end of the second communicating pipe is communicated with the circulating water inlet pipe between the first electric valve and the TCA cooler, and the other end of the second communicating pipe is communicated with the circulating water inlet pipe between the first check valve and the condensed water recycling pump set; the fourth electrically operated valve is provided on the second communication pipe.
5. The cooling water system for cooling air of a gas turbine engine according to claim 1, wherein the condensate recirculation pump group comprises a plurality of condensate recirculation pumps, a third manual valve, a third check valve and a fifth electric valve; the water inlet end of each condensate water recirculation pump is provided with the third manual valve; and the water outlet end of each condensate water recirculation pump is provided with the third check valve and the fifth electric valve.
6. A cooling water system for cooling air for a turbine of a combustion engine as set forth in claim 1 wherein said second valve set includes a third electrically actuated trim valve, a fourth manually actuated valve; the third electric adjusting valve is arranged on the water return pipe of the heater; the fourth manual valve is arranged on the heater water return pipe between the third electric control valve and the condensed water heater.
7. A cooling water system for turbine cooling air of a combustion engine as claimed in claim 1, wherein said third valve set comprises a fourth electrically operated governor valve, a fifth manual valve; the fourth electric adjusting valve is arranged on the low-package water return pipe; the fifth manual valve is arranged on the low-package water return pipe between the condensed water recycling pump group and the fourth electric adjusting valve.
8. The cooling water system for cooling air of a turbine of a gas turbine engine according to claim 1, further comprising a condenser, a condensate pump group, and a sixth electric valve; the water inlet end of the condensed water pump set is communicated with the water outlet end of the condenser; the water outlet end of the condensed water pump set is connected with the other end of the condensed water main pipe; and a sixth electric valve is arranged on the condensed water main pipe.
9. The cooling water system for cooling air of a gas turbine engine according to claim 8, wherein the condensate pump group includes a plurality of condensate pumps, a seventh electric valve, a fourth check valve, a pressure reducing valve, and an eighth electric valve; the water inlet end of each condensate pump is provided with the pressure reducing valve and the eighth electric valve; and the water outlet end of each condensate pump is provided with the fourth check valve and the seventh electric valve.
10. The cooling water system for cooling air of a turbine of an internal combustion engine according to claim 1, 2, 4, 5, 8 or 9, wherein the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve and the eighth electric valve are all electric stop valves.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110568970.1A CN115387910A (en) | 2021-05-25 | 2021-05-25 | Cooling water system for cooling air of turbine of gas turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110568970.1A CN115387910A (en) | 2021-05-25 | 2021-05-25 | Cooling water system for cooling air of turbine of gas turbine |
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| CN214887387U (en) * | 2021-05-25 | 2021-11-26 | 华能北京热电有限责任公司 | Cooling water system for cooling air of turbine of gas turbine |
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| JP2013231393A (en) * | 2012-04-27 | 2013-11-14 | Toshiba Corp | Steam turbine plant |
| JP2014020348A (en) * | 2012-07-23 | 2014-02-03 | Toshiba Corp | Steam turbine system |
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