CN114635797A - Control system for inlet air temperature of gas turbine - Google Patents
Control system for inlet air temperature of gas turbine Download PDFInfo
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- CN114635797A CN114635797A CN202011477222.4A CN202011477222A CN114635797A CN 114635797 A CN114635797 A CN 114635797A CN 202011477222 A CN202011477222 A CN 202011477222A CN 114635797 A CN114635797 A CN 114635797A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 338
- 239000008236 heating water Substances 0.000 claims abstract description 78
- 238000002485 combustion reaction Methods 0.000 claims abstract description 44
- 239000000498 cooling water Substances 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 107
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 32
- 239000002918 waste heat Substances 0.000 claims description 23
- 230000002209 hydrophobic effect Effects 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 description 24
- 230000007613 environmental effect Effects 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/057—Control or regulation
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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
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
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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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The embodiment of the invention provides a control system for the inlet air temperature of a combustion engine, which comprises: the gas-steam combined cycle unit comprises a gas-steam combined cycle unit and a heat exchange mechanism, wherein the heat exchange mechanism comprises an air heat exchanger, and an air outlet of the air heat exchanger is communicated with an air inlet of a gas compressor of the gas turbine; the water inlet end of the air heat exchanger is connected with a heat exchange water inlet pipeline, and a third valve is arranged on the heat exchange water inlet pipeline and used for controlling the water circulation in the heat exchange water inlet pipeline; the water outlet end of the air heat exchanger is connected with a heat exchange water outlet pipeline, and a fourth valve is arranged on the heat exchange water outlet pipeline and used for controlling the water circulation in the heat exchange water outlet pipeline; a cooling water inlet pipe is led out from the heat exchange water inlet pipeline to convey cooling media, and a first heating water inlet pipe and a second heating water inlet pipe are led out to convey heating media. The invention controls the switching of cold and hot media of the air heat exchanger through a plurality of valves, realizes the purpose of increasing or reducing the inlet air temperature of the gas turbine according to the actual operation condition, and meets different requirements of the unit.
Description
Technical Field
The invention relates to the technical field of power generation equipment, in particular to a control system for the air inlet temperature of a combustion engine.
Background
At present, a large amount of internal combustion engine power plants are put into operation, and the efficiency of a gas-steam combined cycle unit is improved by 0.1 percent to generate good energy-saving effect and great economy, so the improvement of the unit efficiency for reducing the operation cost of the power plants becomes an important subject in recent years. For a gas-steam combined cycle unit, the operating mode and efficiency of a gas turbine directly affect the efficiency of the whole combined cycle unit, and the temperature of the gas turbine inlet has a great influence on the performance of the gas turbine according to the operating characteristics of the gas turbine.
On one hand, the output of the combustion engine is in a linear relation with the ambient temperature, and the combustion engine cannot reach the output of a nameplate under the summer heavy-load working condition in the environment with higher temperature, so that the output of the combustion engine during summer heavy-load operation is prevented to be a necessary phenomenon, the characteristic of the gas turbine is prevented from being regulated by a power grid due to the heavy-load peak requirement of the power grid in summer, and even the utilization hour guarantee of the gas turbine is directly influenced.
On the other hand, the main factors influencing the efficiency of the gas-steam combined cycle power plant include equipment type selection in the construction period, system design, main parameters, index determination, operation mode in the operation period, unit load rate, temperature before turbine of the gas turbine, main parameters (temperature, pressure and flow) of a waste heat boiler (steam turbine), and cold end loss, but most of the factors of the unit which is put into operation cannot be controlled by the power plant, the efficiency of the whole combined cycle is improved only by increasing the temperature before the turbine and reducing the cold end loss, and according to the operation characteristic of the gas turbine, the higher the temperature before the turbine of the gas turbine is, the higher the unit efficiency is, so that the unit efficiency can be improved by heating the inlet temperature of the gas turbine under the condition of partial load.
In summary, the intake air temperature of the combustion engine needs to be adjusted correspondingly according to the external working environment temperature, but in the prior art, the adjustment of the intake air temperature of the combustion engine can only be realized through a single increasing or decreasing manner, the adjustment manner is relatively single, the intake air temperature of the combustion engine can only be increased or decreased, and the intake air temperature of the combustion engine cannot be adjusted according to different requirements of the operating conditions. Therefore, a control system capable of realizing cold and hot medium switching and achieving the purpose of adjusting the intake temperature of the combustion engine is needed.
Disclosure of Invention
The present disclosure provides a system for controlling the intake air temperature of a combustion engine to overcome at least one technical problem in the prior art.
According to an embodiment of the present specification, there is provided a control system of an intake air temperature of a combustion engine, the control system including: gas-steam combined cycle unit and heat transfer mechanism, wherein:
the gas-steam combined cycle unit includes: the system comprises a gas turbine, a closed cold water heat exchanger, a closed cold water return pipe, a closed cold water supply pipe and a secondary drainage cooler; a water inlet of the closed cold water heat exchanger is connected with a closed cold water return pipe, and a first valve is mounted on the closed cold water return pipe and used for controlling the return water circulation of the closed cold water in the closed cold water return pipe; the water outlet of the closed cold water heat exchanger is connected with a closed cold water supply pipe, and a second valve is arranged on the closed cold water supply pipe and used for controlling closed cold water circulation in the closed cold water supply pipe; the water inlet of the secondary drainage cooler is communicated with the closed cold water supply pipe, and the water outlet of the secondary drainage cooler is communicated with the closed cold water return pipe;
the heat exchange mechanism comprises an air heat exchanger, a heat exchange water inlet pipeline, a heat exchange water outlet pipeline, a first pump body, a cooling water inlet pipe, a cooling water outlet pipe, a lithium bromide device, a first heating water inlet pipe, a first heating water outlet pipe, a second heating water inlet pipe, a second heating water outlet pipe and a water guide pipe; the air outlet of the air heat exchanger is communicated with the air inlet of the compressor of the gas turbine; the water inlet end of the air heat exchanger is connected with the heat exchange water inlet pipeline, and a third valve is arranged on the heat exchange water inlet pipeline and used for controlling the water circulation in the heat exchange water inlet pipeline; the water outlet end of the air heat exchanger is connected with the heat exchange water outlet pipeline, and the heat exchange water outlet pipeline is provided with a fourth valve for controlling the water circulation in the heat exchange water outlet pipeline; the first pump body is arranged on the heat exchange water outlet pipeline; a path of cooling water inlet pipe is led out from the heat exchange water inlet pipeline and is communicated with a water outlet of the lithium bromide device, and a fifth valve is arranged on the cooling water inlet pipe and is used for controlling the circulation of air conditioner cold water in the cooling water inlet pipe; a cooling water outlet pipe led out from the heat exchange water outlet pipeline is communicated with a water inlet of the lithium bromide device, and a sixth valve is arranged on the cooling water outlet pipe and used for controlling the water flow in the cooling water outlet pipe; a path of first heating water inlet pipe is led out from the heat exchange water inlet pipeline and communicated with the closed cold water return pipe, and the first heating water inlet pipe is arranged between the first valve and the secondary drainage cooler; a seventh valve is arranged on the first heating water inlet pipe and used for controlling the water circulation in the first heating water inlet pipe; a first heating water outlet pipe is led out from the heat exchange water outlet pipeline and communicated with the closed cold water supply pipe, and the first heating water outlet pipe is arranged between the second valve and the secondary drainage cooler; the first heating water outlet pipe is provided with an eighth valve for controlling the water flow in the first heating water outlet pipe; a path of second heating water inlet pipe led out from the heat exchange water inlet pipeline is communicated with a water outlet of the secondary drainage cooler, and a ninth valve is arranged on the second heating water inlet pipe and used for controlling the water flow in the second heating water inlet pipe; a second heating water outlet pipe led out from the heat exchange water outlet pipeline is communicated with a water inlet of the secondary drainage cooler, and a tenth valve is arranged on the second heating water outlet pipe and used for controlling the water flow in the second heating water outlet pipe; the second heating water outlet pipe is connected with the water diversion pipe, and an eleventh valve is installed on the water diversion pipe and used for controlling medium water circulation in the water diversion pipe;
when the air heat exchanger is not put into operation, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve and the eleventh valve are closed, the first valve and the second valve are opened, closed cold water flows out of the closed cold water heat exchanger and flows into the secondary drainage cooler through the closed cold water supply pipe, secondary drainage of a heat supply network is cooled in the secondary drainage cooler, and the heat-exchanged closed cold water is conveyed back into the closed cold water heat exchanger through the closed cold water return pipe;
when the intake temperature of the combustion engine needs to be reduced, the seventh valve, the eighth valve, the ninth valve, the tenth valve and the eleventh valve are closed, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are opened, the second stage drainage of the heat supply network in the second stage drainage cooler is cooled by the cold water flowing out from the cold water heat exchanger, air conditioner cold water generated by the lithium bromide device is conveyed into the air heat exchanger through the cooling water inlet pipe and the heat exchange water inlet pipeline, the air conditioner cold water cools air in the air heat exchanger, the cooled air enters the gas turbine through a gas compressor air inlet of the gas turbine, and the air conditioner cold water after heat exchange sequentially flows through the heat exchange water outlet pipeline and the cooling water outlet pipe under the action of the first pump body and is conveyed back into the lithium bromide device;
when the inlet air temperature of the gas turbine needs to be increased, the first valve, the second valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve are closed, the third valve, the fourth valve, the ninth valve, the tenth valve and the eleventh valve are opened, intermediate water is introduced through the water conduit and is conveyed into the secondary drainage cooler through the second heating water outlet pipe, secondary drainage of a heat supply network is cooled in the secondary drainage cooler, the intermediate water heated after heat exchange is conveyed into the air heat exchanger through the second heating water inlet pipe and the heat exchange water inlet pipe, air is heated in the air heat exchanger, the heated air enters the gas turbine through an air compressor air inlet of the gas turbine, and the intermediate water subjected to heat exchange is conveyed into the secondary drainage cooler through the heat exchange water outlet pipe and the second heating water outlet pipe under the action of the first pump body, cooling the secondary drainage of the heat supply network in the secondary drainage cooler, and performing circulating heat exchange; or,
when the inlet air temperature of the gas turbine needs to be increased, the first valve, the second valve, the fifth valve, the sixth valve, the ninth valve, the tenth valve and the eleventh valve are closed, the third valve, the fourth valve, the seventh valve and the eighth valve are opened, the closed cold water return water in the closed cold water return pipe is conveyed to the air heat exchanger through the first heating water inlet pipe and the heat exchange water inlet pipe, heat exchange is carried out between the air heat exchanger and air, the heated air enters the gas turbine through the air compressor air inlet of the gas turbine after heat exchange, and the cooled closed cold water return water after heat exchange is conveyed to the closed cold water supply pipe through the heat exchange water outlet pipe and the first heating water outlet pipe under the action of the first pump body and enters the closed cold water circulation system again for circulation.
Optionally, the gas-steam combined cycle unit further includes a waste heat boiler, a steam turbine, a condenser, a cooling tower, a second pump body, a heat supply network heater, and a primary water drainage cooler, wherein:
the steam outlet end of the gas turbine is communicated with the steam inlet end of the waste heat boiler, the steam outlet end of the waste heat boiler is communicated with the steam inlet end of the steam turbine, the steam outlet end of the steam turbine is communicated with the steam inlet end of the heat supply network heater, the steam outlet end of the heat supply network heater is communicated with the water inlet end of the first-stage hydrophobic cooler, the water outlet end of the first-stage hydrophobic cooler is communicated with the water inlet end of the second-stage hydrophobic cooler, the steam exhaust end of the steam turbine is communicated with the steam inlet end of the condenser, the water outlet end of the condenser is communicated with the water inlet end of the waste heat boiler, and the cooling tower is respectively communicated with the condenser and the closed water heat exchanger.
Further optionally, the gas-steam combined cycle unit further comprises a second pump body, a water inlet end of the second pump body is connected with a water discharge end of the condenser, and a water outlet end of the second pump body is connected with a water inlet end of the waste heat boiler.
Further optionally, the first pump body and the second pump body are both booster pumps.
Further optionally, the gas-steam combined cycle unit further includes a first generator, and the steam turbine is coaxially connected to the first generator and drives the first generator to generate electricity.
Optionally, the gas-steam combined cycle unit further comprises a second generator, and a compressor of the gas turbine is coaxially connected with the second generator to drive the second generator to generate electricity.
Optionally, the air heat exchanger is a plate air heat exchanger.
Optionally, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve, and the eleventh valve are stop valves.
The beneficial effects of the embodiment of the specification are as follows:
the air inlet temperature of the gas turbine is adjusted by arranging the air heat exchanger at the inlet of the gas compressor of the gas turbine, and the switching of cold and hot media is controlled by the valves, so that the purpose of increasing or reducing the air inlet temperature of the gas turbine according to the actual operation condition is realized, and different requirements of the unit under different operation conditions are met. Under the working condition of high environmental temperature and large load in summer, cold medium is introduced into the air heat exchanger to cool air at the air inlet of the gas turbine, so that the air inlet temperature of the gas turbine is reduced, the output of the gas turbine in summer is kept, the peak operation in summer is realized, and the load capacity of the gas turbine power plant is improved. Under the condition of partial load, a heat medium is introduced into the air heat exchanger to heat air at the air inlet of the gas turbine, so that the air inlet temperature of the gas turbine is increased, the front temperature of the gas turbine is increased, and the efficiency of the unit is improved.
The innovation points of the embodiment of the specification comprise:
1. in the embodiment, the air heat exchanger is arranged at the inlet of the compressor of the gas turbine to adjust the inlet air temperature of the gas turbine, and the switching of the cold and hot media is controlled by the valves, so that the aim of increasing or reducing the inlet air temperature of the gas turbine according to the actual operation condition is fulfilled, different requirements of the unit under different operation conditions are met, and the air heat exchanger is one of innovation points of the embodiment of the specification.
2. In the embodiment, under the working condition of high environmental temperature and large load in summer, the cold medium is introduced into the air heat exchanger to cool the air at the air inlet of the gas turbine, so that the air inlet temperature of the gas turbine is reduced, the output of the gas turbine in summer is kept, the summer peak operation is realized, and the load capacity of the gas turbine power plant is improved.
3. In this embodiment, under the condition of partial load, a heat medium is introduced into the air heat exchanger to heat air at the air inlet of the combustion engine, so that the inlet air temperature of the combustion engine is increased, and the front temperature of the combustion engine turbine is increased, thereby improving the unit efficiency.
4. In the embodiment, the cold water of the air conditioner generated by the air conditioner of the power plant is used as the cold medium source of the air heat exchanger, and on the basis of not increasing additional investment, the air inlet temperature of the combustion engine is reduced by using the existing refrigeration system, so that the purpose of increasing the output of the combustion engine is achieved, and the cold water cooling system is one of the innovation points of the embodiment of the specification.
5. In the embodiment, the secondary drainage of the heat supply network of the low-grade heat source is used as a heat medium source of the air heat exchanger, so that the problem of poor economic benefit caused by the fact that a high-grade heat source is adopted in an air exhaust mode of the compressor in the prior art is solved, the cold source loss of the unit and the recovery temperature of the working medium are reduced, the air inlet temperature of the gas turbine is increased, the unit efficiency is further improved, and the method is one of the innovation points of the embodiment of the specification.
6. In the embodiment, the closed cold water backwater is used as a heat medium source of the air heat exchanger, and a low-grade heat source is adopted, so that the problem of poor economic benefit caused by the fact that a high-grade heat source is adopted in an air exhaust mode of the compressor in the prior art is solved, the inlet air temperature of the gas turbine can be increased, the cold source loss is reduced, the purpose of improving the unit efficiency is achieved, and the closed cold water backwater air conditioner is one of the innovation points of the embodiment of the specification.
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 control system for the intake air temperature of a combustion engine according to an embodiment of the present disclosure;
in the figure, 1 is a gas turbine, 2 is a closed cold water heat exchanger, 3 is a closed cold water return pipe, 4 is a closed cold water supply pipe, 5 is a two-stage hydrophobic cooler, 6 is a first valve, 7 is a second valve, 8 is an air heat exchanger, 9 is a heat exchange water inlet pipe, 10 is a heat exchange water outlet pipe, 11 is a first pump body, 12 is a cooling water inlet pipe, 13 is a cooling water outlet pipe, 14 is a lithium bromide device, 15 is a first heating water inlet pipe, 16 is a first heating water outlet pipe, 17 is a second heating water inlet pipe, 18 is a second heating water outlet pipe, 19 is a water guide pipe, 20 is a third valve, 21 is a fourth valve, 22 is a fifth valve, 23 is a sixth valve, 24 is a seventh valve, 25 is an eighth valve, 26 is a ninth valve, 27 is a tenth valve, 28 is an eleventh valve, 29 is a waste heat boiler, 30 is a steam turbine, 31 is a condenser, 32 is a cooling tower, 33 is a heat supply network heater, 34 is a first-stage hydrophobic cooler, 35 is a second pump body, 36 is a first generator, and 37 is a second generator.
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 based on the embodiments of the present invention without inventive step, 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 control system for the inlet air temperature of a combustion engine. The following are detailed below.
The output power of a gas turbine, which is a positive displacement power machine, is related to the mass flow of inlet air, and when the temperature of the inlet air is reduced, the density of the air is increased, and the mass flow of the inlet air is increased, so that the output power and efficiency of the combustion engine are also improved, and therefore, the following conclusion can be reached: in a "cold" environment, the gas turbine has a greater output, so the engine output can be increased by reducing the inlet air temperature in a high temperature environment. Under partial load, if the inlet air temperature is increased under the condition of constant load, the front temperature of the turbine is increased (if the inlet air temperature is not subjected to temperature control), so that the efficiency of the gas turbine is improved, when the gas turbine runs under the partial load, the inlet air mass flow of the air compressor is a fixed value, the inlet air temperature of the gas turbine is increased, the inlet air density is reduced, the inlet volume flow is increased, the IGV angle of the air compressor is forced to be enlarged, the throttling loss of air flowing in the IGV is reduced, the running condition of the air compressor is improved, and the purposes of saving energy and improving the efficiency are achieved. Therefore, the requirement of the internal combustion engine on the intake air temperature is different under different running conditions, the output of the internal combustion engine needs to be improved by reducing the intake air temperature of the internal combustion engine under a high-temperature and large-load condition, and the efficiency of the internal combustion engine needs to be improved by increasing the intake air temperature of the internal combustion engine under a partial-load condition.
An embodiment of the present invention provides a control system for an intake air temperature of a combustion engine, as shown in fig. 1, the control system includes: gas-steam combined cycle unit and heat transfer mechanism, wherein, gas-steam combined cycle unit includes: the gas turbine 1, close cold water heat exchanger 2, close cold water wet return 3, close cold water supply pipe 4, second grade drainage cooler 5, heat transfer mechanism includes air heat exchanger 8, heat transfer inlet channel 9, heat transfer outlet conduit 10, the first pump body 11, cooling inlet tube 12, cooling outlet pipe 13, lithium bromide device 14, first heating inlet tube 15, first heating outlet pipe 16, second heating inlet tube 17, second heating outlet pipe 18, leading water pipe 19.
Specifically, a water inlet of the closed cold water heat exchanger 2 is connected with a closed cold water return pipe 3, and a first valve 6 is mounted on the closed cold water return pipe 3 and used for controlling return water circulation of closed cold water in the closed cold water return pipe 3; a water outlet of the closed cold water heat exchanger 2 is connected with a closed cold water supply pipe 4, and a second valve 7 is mounted on the closed cold water supply pipe 4 and used for controlling closed cold water circulation in the closed cold water supply pipe 4; the water inlet of the secondary drainage cooler 5 is communicated with the closed cold water supply pipe 4, and the water outlet of the secondary drainage cooler 5 is communicated with the closed cold water return pipe 3;
an air outlet of the air heat exchanger 8 is communicated with an air inlet of a compressor of the gas turbine 1; the water inlet end of the air heat exchanger 8 is connected with the heat exchange water inlet pipeline 9, and a third valve 20 is arranged on the heat exchange water inlet pipeline 9 and used for controlling the water circulation in the heat exchange water inlet pipeline 9; the water outlet end of the air heat exchanger 8 is connected with the heat exchange water outlet pipeline 10, and the heat exchange water outlet pipeline 10 is provided with a fourth valve 21 for controlling the water circulation in the heat exchange water outlet pipeline 10; the first pump body 11 is installed on the heat exchange water outlet pipeline 10; a cooling water inlet pipe 12 led out from the heat exchange water inlet pipeline 9 is communicated with a water outlet of the lithium bromide device 14, and a fifth valve 22 is arranged on the cooling water inlet pipe 12 and used for controlling the circulation of air conditioner cold water in the cooling water inlet pipe 12; a cooling water outlet pipe 13 led out from the heat exchange water outlet pipeline 10 is communicated with a water inlet of the lithium bromide device 14, and a sixth valve 23 is arranged on the cooling water outlet pipe 13 and used for controlling the water circulation in the cooling water outlet pipe 13; a path of first heating water inlet pipe 15 is led out from the heat exchange water inlet pipeline 9 and is communicated with the closed cold water return pipe 3, and the first heating water inlet pipe 15 is arranged between the first valve 6 and the secondary drainage cooler 5; a seventh valve 24 is installed on the first heating water inlet pipe 15 and used for controlling the water circulation in the first heating water inlet pipe 15; a path of the first heating water outlet pipe 16 led out from the heat exchange water outlet pipeline 10 is communicated with the closed cold water supply pipe 4, and the first heating water outlet pipe 16 is arranged between the second valve 7 and the secondary drainage cooler 5; an eighth valve 25 is installed on the first heating water outlet pipe 16 and used for controlling the water circulation in the first heating water outlet pipe 16; a path of the second heating water inlet pipe 17 led out from the heat exchange water inlet pipeline 9 is communicated with a water outlet of the secondary drainage cooler 5, and a ninth valve 26 is arranged on the second heating water inlet pipe 17 and used for controlling the water circulation in the second heating water inlet pipe 17; a path of the second heating water outlet pipe 18 led out from the heat exchange water outlet pipeline 10 is communicated with a water inlet of the secondary drainage cooler 5, and a tenth valve 27 is arranged on the second heating water outlet pipe 18 and used for controlling the water circulation in the second heating water outlet pipe 18; the water conduit 19 is connected to the second heating water outlet pipe 18, and an eleventh valve 28 is installed on the water conduit 19 and used for controlling the medium water circulation in the water conduit 19.
An air heat exchanger 8 is arranged at an air inlet of a compressor of a gas turbine 1, and a plurality of valves control the switching of cold and hot media of the air heat exchanger 8 through a first valve 6, a second valve 7, a third valve 20, a fourth valve 21, a fifth valve 22, a sixth valve 23, a seventh valve 24, an eighth valve 25, a ninth valve 26, a tenth valve 27 and an eleventh valve 28, so that different requirements of a unit under actual operation conditions are met.
In the embodiment of the present invention, the heat exchange water inlet pipe 9 serves as a total water inlet pipe of the air heat exchanger 8 and is used for conveying a heat exchange medium into the air heat exchanger 8, the third valve 20 is used for connecting or blocking water circulation in the heat exchange water inlet pipe 9, the heat exchange water outlet pipe 10 serves as a total water outlet pipe of the air heat exchanger 8 and is used for conveying the heat exchange medium after heat exchange in the air heat exchanger 8 to the outside of the air heat exchanger 8, and the fourth valve 21 is used for connecting or blocking water circulation in the heat exchange water outlet pipe 10. The cooling water inlet pipe 12 and the cooling water outlet pipe 13 are cold medium conveying pipelines of the air heat exchanger 8, and control the circulation of cold media in the pipelines respectively through a fifth valve 22 and a sixth valve 23, the first heating water inlet pipe 15 and the first heating water outlet pipe 16 are conveying pipelines for closing a cold water return heat medium source of the air heat exchanger 8, and block or connect the conveying of a cold water return heat source to the air heat exchanger 8 through a first valve 6, a second valve 7, a seventh valve 24 and an eighth valve 25, and the second heating water inlet pipe 17 and the second heating water outlet pipe 18 are conveying pipelines for closing a cold water return heat source of the air heat exchanger 8, and block or connect the conveying of medium water to a hot water network second-level hydrophobic heat medium source of the air heat exchanger 8 through a ninth valve 26, a tenth valve 27 and an eleventh valve 28.
The cold water of the air conditioner is used as a cold medium source of the air heat exchanger 8, so that the air inlet temperature of the combustion engine can be reduced to achieve the purpose of increasing the output of the combustion engine, and the additional investment cost is reduced by utilizing the existing refrigerating system. Meanwhile, in the embodiment, the closed cold water return water and the second-level drainage of the heat supply network are used as the heat medium source of the air heat exchanger 8, and the low-grade heat source is used, so that the problem that the economic benefit is poor due to the fact that a high-grade heat source is adopted in the air exhaust mode of the compressor in the prior art is solved, the cold source loss of the unit is reduced, and the purpose of improving the air inlet temperature of the gas turbine to improve the efficiency of the unit is achieved.
The specific control process of the control system for the intake air temperature of the combustion engine provided by the embodiment is as follows:
when the air heat exchanger 8 is not in operation, the third valve 20, the fourth valve 21, the fifth valve 22, the sixth valve 23, the seventh valve 24, the eighth valve 25, the ninth valve 26, the tenth valve 27 and the eleventh valve 28 are closed, the first valve 6 and the second valve 7 are opened, the closed cold water flows out of the closed cold water heat exchanger 2 and flows into the secondary hydrophobic cooler 5 through the closed cold water supply pipe 4, the secondary hydrophobic of the heat supply network is cooled in the secondary hydrophobic cooler 5, and the closed cold water after heat exchange is conveyed back into the closed cold water heat exchanger 2 through the closed cold water return pipe 3;
when the inlet air temperature of the gas turbine needs to be reduced, the seventh valve 24, the eighth valve 25, the ninth valve 26, the tenth valve 27 and the eleventh valve 28 are closed, the first valve 6, the second valve 7, the third valve 20, the fourth valve 21, the fifth valve 22 and the sixth valve 23 are opened, the secondary drainage of the heat supply network in the secondary drainage cooler 5 is cooled by the cold water flowing out from the cold water heat exchanger 2, the air-conditioning cold water generated by the lithium bromide device 14 is conveyed into the air heat exchanger 8 through the cooling water inlet pipe 12 and the heat exchange water inlet pipe 9, the air-conditioning cold water cools the air in the air heat exchanger 8, the cooled air enters the gas turbine 1 through the air inlet of the gas turbine 1, and the air-conditioning cold water after heat exchange sequentially flows through the heat exchange water outlet pipe 10 and the heat exchange water outlet pipe 10 under the action of the first pump body 11, A cooling water outlet pipe 13 which is conveyed back to the lithium bromide device 14;
when the inlet air temperature of the combustion engine needs to be increased, the first valve 6, the second valve 7, the fifth valve 22, the sixth valve 23, the seventh valve 24 and the eighth valve 25 are closed, the third valve 20, the fourth valve 21, the ninth valve 26, the tenth valve 27 and the eleventh valve 28 are opened, intermediate water is introduced through the water guide pipe 19 and is conveyed into the secondary hydrophobic cooler 5 through the second heating water outlet pipe 18, secondary hydrophobic of a heat supply network is cooled in the secondary hydrophobic cooler 5, the intermediate water heated after heat exchange is conveyed into the air heat exchanger 8 through the second heating water inlet pipe 17 and the heat exchange water inlet pipe 9, air is heated in the air heat exchanger 8, the heated air enters the combustion turbine 1 through the air compressor air inlet of the combustion turbine 1, and the intermediate water after heat exchange passes through the water outlet pipe 10 and the heat exchange water outlet pipe 10 under the action of the first pump body 11, The second heating water outlet pipe 18 is conveyed into the secondary drainage cooler 5 to cool the secondary drainage of the heat supply network in the secondary drainage cooler 5, and the circulating heat exchange is carried out; or,
when the intake temperature of the internal combustion engine needs to be increased, the first valve 6, the second valve 7, the fifth valve 22, the sixth valve 23, the ninth valve 26, the tenth valve 27 and the eleventh valve 28 are closed, the third valve 20, the fourth valve 21, the seventh valve 24 and the eighth valve 25 are opened, the closed cold water return water in the closed cold water return pipe 3 is conveyed to the air heat exchanger 8 through the first heating water inlet pipe 15 and the heat exchange water inlet pipeline 9, and heat exchange is carried out between the air and air in the air heat exchanger 8, the heated air enters the gas turbine 1 through an air compressor air inlet of the gas turbine 1 after heat exchange, and the cooled cold water return water after heat exchange is conveyed to the cold water supply pipe 4 through the heat exchange water outlet pipeline 10 and the first heating water outlet pipe 16 under the action of the first pump body 11 and enters the cold water circulation system again for circulation.
As can be seen from the above, in the present embodiment, the supply of the cold and hot media into the air heat exchanger 8 is switched by controlling a plurality of valves, and preferably, the first valve 6, the second valve 7, the third valve 20, the fourth valve 21, the fifth valve 22, the sixth valve 23, the seventh valve 24, the eighth valve 25, the ninth valve 26, the tenth valve 27, and the eleventh valve 28 are all stop valves. Furthermore, the air heat exchanger 8 is preferably a plate air heat exchanger.
Therefore, the purpose of increasing or reducing the inlet air temperature of the combustion engine according to the actual operation condition is achieved, and different requirements of the unit are met. Under the working condition of high environmental temperature and large load in summer, cold medium is introduced into the air heat exchanger to cool air at the air inlet of the gas turbine, so that the air inlet temperature of the gas turbine is reduced, the output of the gas turbine in summer is kept, the peak operation in summer is realized, and the load capacity of the gas turbine power plant is improved. Under the condition of partial load, a heat medium is introduced into the air heat exchanger to heat air at the air inlet of the gas turbine, so that the air inlet temperature of the gas turbine is increased, the front temperature of the turbine of the gas turbine is increased, and the efficiency of the unit is improved.
In a specific embodiment, the gas-steam combined cycle unit further includes a waste heat boiler 29, a steam turbine 30, a condenser 31, a cooling tower 32, a heat supply network heater 33 and a primary drain cooler 34, wherein a steam outlet of the gas turbine 1 is communicated with a steam inlet of the waste heat boiler 29, a steam outlet of the waste heat boiler 29 is communicated with a steam inlet of the steam turbine 30, a steam outlet of the steam turbine 30 is communicated with a steam inlet of the heat supply network heater 33, a steam outlet of the heat supply network heater 33 is communicated with a water inlet of the primary drain cooler 34, a water outlet of the primary drain cooler 34 is communicated with a water inlet of the secondary drain cooler 5, a steam outlet of the steam turbine 30 is communicated with a steam inlet of the condenser 31, and a water outlet of the condenser 31 is communicated with a water inlet of the waste heat boiler 29, the cooling tower 32 is respectively communicated with the condenser 31 and the closed cold water heat exchanger 2.
The air after heat exchange in the air heat exchanger 8 enters the compressor in the gas turbine 1 from the air inlet of the compressor, is compressed in the compressor, then flows to the combustion chamber of the gas turbine 1, is mixed with fuel sprayed in the combustion chamber and then is combusted to form high-temperature gas, then flows into the turbine of the gas turbine 1 to expand and work, then the high-temperature gas still having high energy is conveyed to the waste heat boiler 29, water is heated in the waste heat boiler 29 to form steam, and the generated steam flows into the steam turbine 30 from the steam outlet end of the waste heat boiler 29 to push the steam turbine 30 to operate. The gas discharged from the steam discharge end of the steam turbine 30 enters the condenser 31 to be cooled to form condensed water, and then the condensed water is discharged from the water discharge end of the condenser 31 and is conveyed to the water inlet end of the waste heat boiler 29 to be used as a water source required by the waste heat boiler 29.
Further, the gas-steam combined cycle unit further comprises a second pump body 35, a water inlet end of the second pump body 35 is connected with a water outlet end of the condenser 31, and a water outlet end of the second pump body 35 is connected with a water inlet end of the exhaust-heat boiler 29. Preferably, the second pump body 35 is a booster pump. The condensate water formed in the condenser 31 is pressurized by the second pump body 35 and then conveyed to the exhaust-heat boiler 29, so that the smooth conveying of the condensate water is ensured, and the stability of the system is improved.
The cooling tower 32 is respectively communicated with the condenser 31 and the closed cold water heat exchanger 2 to provide a cooling water source for the condenser 31 and the closed cold water heat exchanger 2, the condenser 31 is used for cooling the exhaust steam of the steam turbine 30 to form condensed water, the closed cold water heat exchanger 2 is used for cooling the closed cold water return water to ensure that the cooled closed cold water is conveyed to the closed cold water circulating system again for circulation, and the cooling tower 32 is used for carrying out heat exchange between the cooling water carrying waste heat and air in the tower to ensure that the waste heat is transmitted to the air and is dissipated into the atmosphere.
The gas-steam combined cycle unit in this embodiment supplies heat to the heat supply network, the high-heat gas exhausted from the steam turbine 30 is used as the heat source of the heat supply network, exhausted from the steam outlet end of the steam turbine 30, and enters the heat supply network heater 33 through the steam inlet end of the heat supply network heater 33 to supply heat to the required area, and meanwhile, in order to reduce the heat loss caused by the low-pressure steam extraction due to drainage and displacement, the water exhausted from the heat supply network heater 33 is sequentially cooled by the primary drainage cooler 34 and the secondary drainage cooler 5 and then is subjected to heat treatment.
In the embodiment of the invention, the control system of the inlet air temperature of the gas turbine adopts a multi-shaft arrangement scheme, the gas-steam combined cycle unit further comprises a first generator 36 and a second generator 37, and the steam turbine 30 is coaxially connected with the first generator 36 and drives the first generator 36 to generate electricity; the compressor of the gas turbine 1 is coaxially connected with the second generator 37 to drive the second generator 37 to generate electricity. In detail, the steam delivered from the exhaust heat boiler 29 to the steam turbine 30 drives the steam turbine 4 to operate, thereby driving the first generator 36 to generate electricity; the high-temperature gas enters a turbine of the gas turbine 1 to do work through expansion, the turbine impeller is pushed to drive the compressor impeller to rotate together, and the second generator 37 is coaxial with the compressor of the gas turbine 1 to further drive the second generator 37 to generate power.
It should be noted and understood that the present embodiment only shows a multi-axis arrangement scheme of the unit, but the present control system is not limited to the multi-axis arrangement scheme, and the present control system can also be applied to a single-axis arrangement scheme according to the requirement.
In summary, the present specification discloses a control system for the inlet air temperature of a gas turbine, which adjusts the inlet air temperature of the gas turbine by arranging an air heat exchanger at the inlet of the gas compressor of the gas turbine, and controls the switching of the cold and hot media through a plurality of valves, so as to achieve the purpose of increasing or decreasing the inlet air temperature of the gas turbine according to the actual operation conditions, and meet different requirements of the unit under different operation conditions. Under the working condition of high environmental temperature and large load in summer, cold medium is introduced into the air heat exchanger to cool air at the air inlet of the gas turbine, so that the air inlet temperature of the gas turbine is reduced, the output of the gas turbine in summer is kept, the peak operation in summer is realized, and the load capacity of the gas turbine power plant is improved. Under the condition of partial load, a heat medium is introduced into the air heat exchanger to heat air at the air inlet of the gas turbine, so that the air inlet temperature of the gas turbine is increased, the front temperature of the gas turbine is increased, and the efficiency of the unit is improved.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams 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 will 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 (8)
1. A control system for an intake air temperature of a combustion engine, characterized by comprising: gas-steam combined cycle unit and heat transfer mechanism, wherein:
the gas-steam combined cycle unit includes: the system comprises a gas turbine, a closed cold water heat exchanger, a closed cold water return pipe, a closed cold water supply pipe and a secondary drainage cooler; a water inlet of the closed cold water heat exchanger is connected with a closed cold water return pipe, and a first valve is mounted on the closed cold water return pipe and used for controlling the return water circulation of the closed cold water in the closed cold water return pipe; the water outlet of the closed cold water heat exchanger is connected with a closed cold water supply pipe, and a second valve is arranged on the closed cold water supply pipe and used for controlling closed cold water circulation in the closed cold water supply pipe; the water inlet of the secondary drainage cooler is communicated with the closed cold water supply pipe, and the water outlet of the secondary drainage cooler is communicated with the closed cold water return pipe;
the heat exchange mechanism comprises an air heat exchanger, a heat exchange water inlet pipeline, a heat exchange water outlet pipeline, a first pump body, a cooling water inlet pipe, a cooling water outlet pipe, a lithium bromide device, a first heating water inlet pipe, a first heating water outlet pipe, a second heating water inlet pipe, a second heating water outlet pipe and a water guide pipe; the air outlet of the air heat exchanger is communicated with the air inlet of the compressor of the gas turbine; the water inlet end of the air heat exchanger is connected with the heat exchange water inlet pipeline, and a third valve is arranged on the heat exchange water inlet pipeline and used for controlling the water circulation in the heat exchange water inlet pipeline; the water outlet end of the air heat exchanger is connected with the heat exchange water outlet pipeline, and the heat exchange water outlet pipeline is provided with a fourth valve for controlling the water circulation in the heat exchange water outlet pipeline; the first pump body is arranged on the heat exchange water outlet pipeline; a path of cooling water inlet pipe is led out from the heat exchange water inlet pipeline and is communicated with a water outlet of the lithium bromide device, and a fifth valve is arranged on the cooling water inlet pipe and is used for controlling the circulation of air conditioner cold water in the cooling water inlet pipe; a cooling water outlet pipe led out from the heat exchange water outlet pipeline is communicated with a water inlet of the lithium bromide device, and a sixth valve is arranged on the cooling water outlet pipe and used for controlling the water flow in the cooling water outlet pipe; a path of first heating water inlet pipe is led out from the heat exchange water inlet pipeline and communicated with the closed cold water return pipe, and the first heating water inlet pipe is arranged between the first valve and the secondary drainage cooler; a seventh valve is arranged on the first heating water inlet pipe and used for controlling the water circulation in the first heating water inlet pipe; a first heating water outlet pipe is led out from the heat exchange water outlet pipeline and communicated with the closed cold water supply pipe, and the first heating water outlet pipe is arranged between the second valve and the secondary drainage cooler; the first heating water outlet pipe is provided with an eighth valve for controlling the water flow in the first heating water outlet pipe; a path of second heating water inlet pipe led out from the heat exchange water inlet pipeline is communicated with a water outlet of the secondary drainage cooler, and a ninth valve is arranged on the second heating water inlet pipe and used for controlling the water flow in the second heating water inlet pipe; a second heating water outlet pipe led out from the heat exchange water outlet pipeline is communicated with a water inlet of the secondary drainage cooler, and a tenth valve is arranged on the second heating water outlet pipe and used for controlling the water flow in the second heating water outlet pipe; the second heating water outlet pipe is connected with the water diversion pipe, and an eleventh valve is installed on the water diversion pipe and used for controlling medium water circulation in the water diversion pipe;
when the air heat exchanger is not put into operation, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve and the eleventh valve are closed, the first valve and the second valve are opened, closed cold water flows out of the closed cold water heat exchanger and flows into the secondary drainage cooler through the closed cold water supply pipe, secondary drainage of a heat supply network is cooled in the secondary drainage cooler, and the heat-exchanged closed cold water is conveyed back into the closed cold water heat exchanger through the closed cold water return pipe;
when the intake temperature of the combustion engine needs to be reduced, the seventh valve, the eighth valve, the ninth valve, the tenth valve and the eleventh valve are closed, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are opened, the second stage drainage of the heat supply network in the second stage drainage cooler is cooled by the cold water flowing out from the cold water heat exchanger, air conditioner cold water generated by the lithium bromide device is conveyed into the air heat exchanger through the cooling water inlet pipe and the heat exchange water inlet pipeline, the air conditioner cold water cools air in the air heat exchanger, the cooled air enters the gas turbine through a gas compressor air inlet of the gas turbine, and the air conditioner cold water after heat exchange sequentially flows through the heat exchange water outlet pipeline and the cooling water outlet pipe under the action of the first pump body and is conveyed back into the lithium bromide device;
when the inlet air temperature of the gas turbine needs to be increased, the first valve, the second valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve are closed, the third valve, the fourth valve, the ninth valve, the tenth valve and the eleventh valve are opened, intermediate water is introduced through the water conduit and is conveyed into the secondary drainage cooler through the second heating water outlet pipe, secondary drainage of a heat supply network is cooled in the secondary drainage cooler, the intermediate water heated after heat exchange is conveyed into the air heat exchanger through the second heating water inlet pipe and the heat exchange water inlet pipe, air is heated in the air heat exchanger, the heated air enters the gas turbine through an air compressor air inlet of the gas turbine, and the intermediate water subjected to heat exchange is conveyed into the secondary drainage cooler through the heat exchange water outlet pipe and the second heating water outlet pipe under the action of the first pump body, cooling the secondary drainage of the heat supply network in the secondary drainage cooler, and performing circulating heat exchange; or,
when the inlet air temperature of the gas turbine needs to be increased, the first valve, the second valve, the fifth valve, the sixth valve, the ninth valve, the tenth valve and the eleventh valve are closed, the third valve, the fourth valve, the seventh valve and the eighth valve are opened, the closed cold water return water in the closed cold water return water pipe is conveyed into the air heat exchanger through the first heating water inlet pipe and the heat exchange water inlet pipe, heat exchange is carried out between the air heat exchanger and air, the heated air enters the gas turbine through the air compressor air inlet of the gas turbine after heat exchange, and the closed cold water return water cooled after heat exchange is conveyed to the closed cold water supply pipe through the heat exchange water outlet pipe and the first heating water outlet pipe under the action of the first pump body and enters the closed cold water circulation system again for circulation.
2. The gas turbine inlet air temperature control system of claim 1, wherein the gas-steam combined cycle unit further comprises a waste heat boiler, a steam turbine, a condenser, a cooling tower, a second pump body, a heat supply network heater and a first-stage hydrophobic cooler, wherein:
the steam outlet end of the gas turbine is communicated with the steam inlet end of the waste heat boiler, the steam outlet end of the waste heat boiler is communicated with the steam inlet end of the steam turbine, the steam outlet end of the steam turbine is communicated with the steam inlet end of the heat supply network heater, the steam outlet end of the heat supply network heater is communicated with the water inlet end of the first-stage hydrophobic cooler, the water outlet end of the first-stage hydrophobic cooler is communicated with the water inlet end of the second-stage hydrophobic cooler, the steam exhaust end of the steam turbine is communicated with the steam inlet end of the condenser, the water outlet end of the condenser is communicated with the water inlet end of the waste heat boiler, and the cooling tower is respectively communicated with the condenser and the closed water heat exchanger.
3. The system for controlling the inlet air temperature of the gas turbine as claimed in claim 2, wherein the gas-steam combined cycle unit further comprises a second pump body, the water inlet end of the second pump body is connected with the water discharge end of the condenser, and the water outlet end of the second pump body is connected with the water inlet end of the waste heat boiler.
4. The system for controlling the intake air temperature of a combustion engine according to claim 2, wherein the first pump body and the second pump body are both booster pumps.
5. The system for controlling inlet air temperature of a gas turbine engine according to claim 2, wherein the gas-steam combined cycle unit further comprises a first generator, and the steam turbine is coaxially connected with the first generator and drives the first generator to generate electricity.
6. The system for controlling the inlet air temperature of the gas turbine as claimed in claim 1, wherein the gas-steam combined cycle unit further comprises a second generator, and the compressor of the gas turbine is coaxially connected with the second generator to drive the second generator to generate electricity.
7. The control method of the intake air temperature of the internal combustion engine according to claim 1, wherein the air heat exchanger is a plate type air heat exchanger.
8. The system for controlling intake air temperature of a combustion engine according to claim 1, wherein the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve, and the eleventh valve are all stop valves.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116104649A (en) * | 2023-02-12 | 2023-05-12 | 华能北京热电有限责任公司 | Air inlet temperature regulating system |
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