CN114278436A - Two-stage dual-mode gas turbine inlet air temperature-adjusting waste heat utilization system and method - Google Patents
Two-stage dual-mode gas turbine inlet air temperature-adjusting waste heat utilization system and method Download PDFInfo
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- CN114278436A CN114278436A CN202111576208.4A CN202111576208A CN114278436A CN 114278436 A CN114278436 A CN 114278436A CN 202111576208 A CN202111576208 A CN 202111576208A CN 114278436 A CN114278436 A CN 114278436A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 247
- 239000007789 gas Substances 0.000 title claims abstract description 239
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 241
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 234
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000010248 power generation Methods 0.000 claims abstract description 32
- 239000000498 cooling water Substances 0.000 claims description 28
- 230000033228 biological regulation Effects 0.000 claims description 10
- 239000003507 refrigerant Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000003546 flue gas Substances 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a two-stage dual-mode gas turbine inlet air temperature-regulating waste heat utilization system and a method, which comprises a waste heat boiler waste heat utilization heat exchanger arranged at a tail flue of a waste heat boiler, a gas turbine inlet heat exchanger arranged in a gas inlet module channel of the gas turbine, photovoltaic and wind power new energy power generation equipment arranged near a unit, an electric refrigerator, an electric heater, a hot water type lithium bromide refrigerator and a gas turbine inlet heat exchanger circulating water tank arranged between the tail flue of the waste heat boiler and the gas turbine inlet module. The invention operates in two modes of cooling and heating, so that the combined cycle unit always operates under the working conditions of optimal efficiency and optimal output, simultaneously improves the operation safety of the combined cycle unit, and effectively improves the operation performance of the gas turbine under most environmental conditions all the year around.
Description
Technical Field
The invention belongs to the technical field of energy conservation of a gas turbine combined cycle unit, and particularly relates to a system and a method for utilizing inlet air temperature-regulating waste heat of a two-stage dual-mode gas turbine.
Background
The gas turbine is a prime mover which takes air as a working medium, generates high-temperature and high-pressure gas after the air is compressed and mixed with fuel to be combusted, and finally applies work by gas expansion. Because the working media participating in the thermodynamic cycle of the gas turbine are all taken from the atmosphere, and the whole system is an open cycle, the power output of the system is greatly influenced by the atmospheric conditions. A large number of tests and operations show that the inlet temperature of the gas turbine has great influence on the output, heat consumption and exhaust gas temperature of the gas turbine.
After the installation site of the gas turbine is determined, the atmospheric pressure generally has little change in 3 parameters of ambient temperature, ambient humidity and atmospheric pressure, and the temperature and the humidity can change along with the local climate and seasons. Of both temperature and humidity, temperature has a greater effect on gas turbine performance. Within a certain operating range, as the intake air temperature increases, its power and efficiency decreases, with a consequent increase in heat rate. The operation performance of the unit can be effectively improved by adjusting the air inlet temperature of the gas turbine, so that the operation performance of the gas turbine is improved by arranging an air inlet temperature adjusting system on the gas turbine in regions with severe temperature change all the year around, and the method becomes an important means for improving the performance of the gas turbine.
The exhaust gas temperature of the waste heat boiler is generally over 90 ℃, and has large deviation with the ambient temperature, which causes a great amount of low-quality heat source waste in the continuous operation of the unit.
Disclosure of Invention
In order to overcome the technical problems, the invention provides a two-stage dual-mode gas turbine inlet air temperature-regulating waste heat utilization system and a method, a temperature regulating system is additionally arranged in a gas turbine inlet system, a heat exchanger, a hot water type lithium bromide refrigerator and other equipment are additionally arranged in a waste heat boiler tail flue, a photovoltaic and wind power distributed new energy power generation system is additionally arranged, the temperature regulating system has two-stage heat exchange and can operate in a cooling mode and a heating mode, a combined cycle unit always operates under the optimal efficiency and the optimal output working condition, the operation safety of the combined cycle unit is improved, and the operation performance of the gas turbine under most of annual environmental conditions is effectively improved.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a two-stage bimodulus gas turbine waste heat utilization system that adjusts temperature that admits air, is including arranging waste heat boiler waste heat utilization heat exchanger B at waste heat boiler afterbody flue, arranging gas turbine heat exchanger A that admits air in the gas turbine air intake module passageway, arranging photovoltaic and wind-powered electricity generation new forms of energy power generation facility C near the unit, arranging electric refrigerator D, electric heater E, hot water type lithium bromide refrigerator F and gas turbine heat exchanger circulation tank I that admits air between waste heat boiler afterbody flue and the gas turbine air intake module.
The gas turbine air inlet heat exchanger A arranged in the gas turbine air inlet module channel is used for exchanging heat of the gas turbine air inlet; the waste heat utilization heat exchanger B of the waste heat boiler is used for recovering the waste heat of the flue gas at the tail part of the waste heat boiler, and the temperature of the flue gas above 85 ℃ can be reduced to below 70 ℃; and the photovoltaic and wind power new energy power generation equipment C is used for generating electric power.
And the electric refrigerator D is used for further cooling the cold water at the outlet of the lithium bromide refrigerator so as to improve the cooling and heat exchange efficiency of the gas turbine air inlet heat exchanger A.
And the electric heater E is used for further heating the circulating water at the outlet of the waste heat utilization heat exchanger B of the waste heat boiler so as to improve the heating and heat exchange efficiency of the gas inlet heat exchanger A of the gas turbine.
The hot water type lithium bromide refrigerator F is used for cooling the circulating water returned from the gas turbine air inlet heat exchanger A by utilizing the energy of the circulating water at the outlet of the waste heat boiler waste heat utilization heat exchanger B.
The gas turbine air inlet heat exchanger circulating water tank I is used for providing a water supply tank for circulating water entering the gas turbine air inlet heat exchanger A, and the stability of a water supply system is ensured.
The waste heat boiler waste heat utilization heat exchanger B hot water outlet pipeline is connected to a hot water inlet valve 8 of a lithium bromide refrigerator heat source water, an outlet of the hot water inlet valve 8 of the lithium bromide refrigerator heat source water is connected to a hot water inlet of a hot water type lithium bromide refrigerator F heat source water, cold water after heat exchange is connected to a hot water return valve 9 of the lithium bromide refrigerator from a hot water outlet of the hot water type lithium bromide refrigerator F heat source water, the hot water return valve 9 of the lithium bromide refrigerator heat source water is connected to a waste heat utilization circulating pump inlet valve 13 of a waste heat boiler, the waste heat utilization circulating pump inlet valve 13 of the waste heat boiler is connected to a waste heat utilization circulating pump G of the waste heat boiler, the waste heat utilization circulating pump G of the waste heat boiler is connected to a waste heat utilization circulating pump outlet valve 14 of the waste heat boiler, the waste heat utilization circulating pump outlet valve 14 of the waste heat boiler is connected to a hot water inlet of the waste heat utilization heat exchanger B of the waste heat boiler, the waste heat utilization circulating pump inlet valve 13 of the waste heat boiler, The waste heat boiler waste heat utilization circulating pump outlet valve 14 and the waste heat boiler waste heat utilization circulating pump G are provided with a waste heat boiler waste heat utilization circulating pump bypass valve 12.
Connect out the pipeline from host computer power tower export circulating water pipeline and be connected to lithium bromide refrigerator cooling water inlet valve 6, lithium bromide refrigerator cooling water inlet valve 6 is connected to 7 cooling water entrys of hot water type lithium bromide refrigerator, and the cooling water return water of hot water type lithium bromide refrigerator 7 is connected to lithium bromide refrigerator cooling water return water valve 7, and lithium bromide refrigerator cooling water return water valve 7 is connected to host computer power tower entry circulating water pipeline.
The outlet of chilled water of the hot water type lithium bromide refrigerator 7 is connected to an inlet valve 4 of an electric refrigerator, the inlet valve 4 of the electric refrigerator is connected to the hot water side inlet of the electric refrigerator D, the chilled water at the outlet of the electric refrigerator D is connected to a water inlet valve 1 of a circulating water tank of a gas turbine gas inlet heat exchanger, the outlet of the water inlet valve 1 of the circulating water tank of the gas turbine gas inlet heat exchanger is connected to a circulating water tank I of the gas turbine gas inlet heat exchanger, the outlet of the circulating water tank I of the gas turbine gas inlet heat exchanger is connected to a refrigerating/heating mode switching valve 15, the refrigerating/heating mode switching valve 15 is connected to a circulating pump H of the gas turbine gas inlet heat exchanger, and the outlet of the circulating pump H of the gas turbine gas inlet heat exchanger is connected to the inlet of the gas turbine gas inlet heat exchanger A.
The waste heat boiler waste heat utilization heat exchanger B is connected with a tee pipe in front of a hot water outlet pipeline of the waste heat boiler waste heat utilization heat exchanger B and a heat source water inlet valve 8 of the lithium bromide refrigerator, the tee pipe is connected to an electric heater water inlet valve 10, an outlet of the electric heater water inlet valve 10 is connected to an electric heater E, an outlet of the electric heater E is connected to an electric heater outlet valve 2, and an outlet of the electric heater outlet valve 2 is connected to an inlet pipeline of a gas turbine air inlet heat exchanger circulating pump H.
The outlet of the gas turbine air inlet heat exchanger A is connected to the outlet valve 3 of the gas turbine air inlet heat exchanger, the outlet pipeline of the gas turbine air inlet heat exchanger outlet valve 3 is divided into two paths, one path is connected to the refrigerant water inlet valve 5 of the gas turbine air inlet heat exchanger of the hot water type lithium bromide refrigerator, and the refrigerant water inlet valve 5 of the gas turbine air inlet heat exchanger of the hot water type lithium bromide refrigerator is connected to the chilled water inlet of the hot water type lithium bromide refrigerator F; the other path is connected to a bypass valve 11 of a waste heat boiler waste heat utilization heat exchanger water inlet lithium bromide refrigerator, and an outlet of the bypass valve 11 of the waste heat boiler waste heat utilization heat exchanger water inlet lithium bromide refrigerator is connected to a pipeline between a heat source water return valve 9 of the lithium bromide refrigerator and an inlet valve 13 of a waste heat boiler waste heat utilization circulating pump.
The operation method of the two-stage dual-mode gas turbine air inlet temperature regulation waste heat utilization system has the advantages that the gas turbine air inlet temperature regulation has two cooling and heating modes, and both the cooling and the heating have two-stage functions;
when the system is in an air inlet cooling mode, the operation modes of each main device, each valve or each valve group, each switch, each pipeline and each accessory are as follows:
(1) the waste heat utilization heat exchanger B of the waste heat boiler, the photovoltaic and wind power new energy power generation equipment C, the waste heat utilization circulating pump G of the waste heat boiler, the hot water type lithium bromide refrigerator F, the electric refrigerator D, the circulating water tank I of the gas inlet heat exchanger of the gas turbine, the circulating pump H of the gas inlet heat exchanger of the gas turbine and the gas inlet heat exchanger A of the gas turbine normally operate; the electric heater E stops working;
(2) a water inlet valve 1 of a circulating water tank of a gas turbine gas inlet heat exchanger, a gas turbine gas inlet heat exchanger outlet valve 3, an electric refrigerator inlet valve 4, a refrigerant water inlet valve 5 of a hot water type lithium bromide refrigerator gas turbine gas inlet heat exchanger, a lithium bromide refrigerator heat source water inlet valve 8, a lithium bromide refrigerator cooling water inlet valve 6, a lithium bromide refrigerator cooling water return valve 7, a lithium bromide refrigerator heat source water return valve 9, a refrigeration/heating mode switching valve 15, a waste heat boiler waste heat utilization circulating pump inlet valve 13 and a waste heat boiler waste heat utilization circulating pump outlet valve 14 are opened; an outlet valve 2 of the electric heater, a water inlet valve 10 of the electric heater, a water inlet lithium bromide refrigerator bypass valve 11 of the waste heat utilization heat exchanger of the waste heat boiler and a waste heat utilization circulating pump bypass valve 12 of the waste heat boiler are closed;
(3) the switch S1 is switched to the photovoltaic and wind power new energy power generation equipment C to be powered by the electric refrigerator D, and the switch S2 is switched to the electric heater E to be powered off when the power of the photovoltaic and wind power new energy power generation equipment is output;
(4) the gas turbine inlet air cooling operation mode is as follows:
the waste heat utilization heat exchanger B of the waste heat boiler absorbs the waste heat of the tail flue of the waste heat boiler to hot water, the high-temperature hot water after heat exchange enters a hot water type lithium bromide refrigerator F, and the heat is transferred to the lithium bromide refrigerator F and then returns to the waste heat utilization heat exchanger B; the lithium bromide refrigerator F is driven by hot water to refrigerate the hot water returned from the gas turbine gas inlet heat exchanger A, and the refrigerated cold water enters the gas turbine gas inlet heat exchanger circulating water tank I; circulating water from the cooling tower enters a lithium bromide refrigerator to take away waste heat, and the circulating water returns to the cooling tower for cooling; the circulating pump H of the gas turbine air inlet heat exchanger conveys cold water in the water tank I to the gas turbine air inlet heat exchanger A, the air inlet of the gas turbine is cooled, the liquid level in the water tank I is kept stable in operation, and the cold water is heated by hot air and then returns to the lithium bromide refrigerator to be cooled continuously;
when the system is in an air inlet heating mode, the operation modes of each main device, each valve or each valve group, each switch, each pipeline and each accessory are as follows:
(1) the waste heat utilization heat exchanger B of the waste heat boiler, the photovoltaic and wind power new energy power generation equipment C, the electric heater E, the circulating pump H of the gas turbine air inlet heat exchanger and the gas turbine air inlet heat exchanger A normally operate; the hot water type lithium bromide refrigerator F, the electric refrigerator D, the waste heat utilization circulating pump G of the waste heat boiler and the circulating water tank I of the gas inlet heat exchanger of the gas turbine stop working;
(2) an outlet valve 2 of the electric heater, an outlet valve 3 of an air inlet heat exchanger of the gas turbine, an inlet valve 10 of the electric heater, a bypass valve 11 of an inlet lithium bromide refrigerator of the waste heat utilization heat exchanger of the waste heat boiler and a bypass valve 12 of a waste heat utilization circulating pump of the waste heat boiler are opened; a water inlet valve 1 of a circulating water tank of a gas turbine gas inlet heat exchanger, a refrigerating/heating mode switching valve 15, an inlet valve 4 of an electric refrigerator, a refrigerant water inlet valve 5 of a gas turbine gas inlet heat exchanger of a hot water type lithium bromide refrigerator, a cooling water inlet valve 6 of the lithium bromide refrigerator, a cooling water return valve 7 of the lithium bromide refrigerator, a heat source water inlet valve 8 of the lithium bromide refrigerator and a heat source water return valve 9 of the lithium bromide refrigerator are closed;
(3) the switch S1 is switched to the photovoltaic and wind power new energy power generation equipment C to supply power to the electric heater E, and the switch S2 is switched to the electric heater E to supply power for the photovoltaic and wind power new energy power generation equipment C;
(4) the gas turbine inlet air heating operation mode is as follows:
the waste heat utilization heat exchanger B of the waste heat boiler absorbs the waste heat of the tail flue of the waste heat boiler to hot water, the high-temperature hot water after heat exchange enters the electric heater E to be continuously heated, the liquid level in the electric heater E is stable during operation, the hot water is heated by the electric heater E and then enters the gas turbine air inlet heat exchanger A under the driving of the gas turbine air inlet heat exchanger circulating pump H to heat the inlet air of the gas turbine, and the cooled hot water directly returns to the waste heat utilization heat exchanger B of the waste heat boiler to continuously absorb heat.
The invention has the beneficial effects that:
1. by adopting the technical scheme of the invention, the waste heat utilization of the combined cycle unit can be realized, and the whole operation efficiency of the unit is obviously improved because new energy power generation systems such as photovoltaic, wind power and the like are adopted as secondary heating or refrigerating energy sources;
2. by adopting the technical scheme of the invention, the air inlet temperature regulating system of the gas turbine can work in two modes of heating and cooling, the air inlet temperature of the gas turbine can be ensured to always meet the requirement that the combined cycle unit works at the optimal air inlet temperature, and the unit has stronger economic operation flexibility;
3. by adopting the technical scheme of the invention, the output of the combined cycle unit in summer can be obviously improved, the phenomenon of icing of the air inlet system of the gas turbine in winter can be avoided, and the operation safety of the combined cycle unit is improved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Description of reference numerals:
a-gas turbine inlet heat exchanger; b, a waste heat utilization heat exchanger of the waste heat boiler; c-photovoltaic and wind power new energy power generation equipment; d-an electric refrigerator; e-an electric heater; an F-hot water type lithium bromide refrigerator; g, a waste heat utilization circulating pump of the waste heat boiler; an H-gas turbine inlet heat exchanger circulating pump; i-gas turbine inlet heat exchanger circulation water tank.
1-a water inlet valve of a circulating water tank of a gas inlet heat exchanger of a gas turbine; 2-electric heater outlet valve; 3-gas turbine inlet heat exchanger outlet valve; 4-electric refrigerator inlet valve; 5-a refrigerant water inlet valve of a gas inlet heat exchanger of a gas turbine of the hot water type lithium bromide refrigerator; 6-cooling water inlet valve of lithium bromide refrigerator; a cooling water return valve of a 7-lithium bromide refrigerator; 8-lithium bromide refrigerator heat source water inlet valve; 9-lithium bromide refrigerator heat source water backwater valve; 10-electric heater water inlet valve; 11-a waste heat boiler waste heat utilization heat exchanger water inlet lithium bromide refrigerator bypass valve; 12-a waste heat utilization circulating pump bypass valve of the waste heat boiler; 13-an inlet valve of a waste heat utilization circulating pump of the waste heat boiler; 14-an outlet valve of the waste heat utilization circulating pump of the waste heat boiler; 15-cooling/heating mode switching valve.
S1-switching and turning-off switches of the power output of the photovoltaic and wind power new energy power generation equipment to the electric refrigerator D and the electric heater E; s2, outputting the power of the photovoltaic and wind power new energy power generation equipment to a turn-off switch of the electric heater E.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a two-stage dual-mode gas turbine inlet air temperature regulation waste heat utilization system and method are provided, the system is additionally provided with a module 1 on the basis of a conventional combined cycle unit, and the module 1 mainly comprises a main device, a valve or a valve group, a switch, a pipeline and accessories:
wherein, the master device in module 1 includes:
a-gas turbine inlet heat exchanger; b, a waste heat utilization heat exchanger of the waste heat boiler; c-photovoltaic and wind power new energy power generation equipment; d-an electric refrigerator; e-an electric heater; an F-hot water type lithium bromide refrigerator; g, a waste heat utilization circulating pump of the waste heat boiler; an H-gas turbine inlet heat exchanger circulating pump; i-gas turbine inlet heat exchanger circulation water tank.
Wherein, the valve or valve group in module 1 includes:
1-a water inlet valve of a circulating water tank of a gas inlet heat exchanger of a gas turbine; 2-electric heater outlet valve; 3-gas turbine inlet heat exchanger outlet valve; 4-electric refrigerator inlet valve; 5-a refrigerant water inlet valve of a gas inlet heat exchanger of a gas turbine of the hot water type lithium bromide refrigerator; 6-cooling water inlet valve of lithium bromide refrigerator; a cooling water return valve of a 7-lithium bromide refrigerator; 8-lithium bromide refrigerator heat source water inlet valve; 9-lithium bromide refrigerator heat source water backwater valve; 10-electric heater water inlet valve; 11-a waste heat boiler waste heat utilization heat exchanger water inlet lithium bromide refrigerator bypass valve; 12-a waste heat utilization circulating pump bypass valve of the waste heat boiler; 13-an inlet valve of a waste heat utilization circulating pump of the waste heat boiler; 14-an outlet valve of the waste heat utilization circulating pump of the waste heat boiler; 15-cooling/heating mode switching valve.
Wherein, the switch in module 1 includes:
s1-switching and turning-off switches of the power output of the photovoltaic and wind power new energy power generation equipment to the electric refrigerator D and the electric heater E; s2, outputting the power of the photovoltaic and wind power new energy power generation equipment to a turn-off switch of the electric heater E.
As shown in fig. 1, the intake temperature-adjusting waste heat utilization system and method for the two-stage dual-mode gas turbine includes the following connection modes of the devices added to the module 1:
a) the waste heat utilization heat exchanger B of the waste heat boiler is arranged in a tail flue of the waste heat boiler, the gas inlet heat exchanger A of the gas turbine is arranged in a gas inlet module channel of the gas turbine, the photovoltaic and wind power new energy power generation equipment C is arranged near a unit, and the electric refrigerator D, the electric heater E, the hot water type lithium bromide refrigerator F and the circulating water tank I of the gas inlet heat exchanger of the gas turbine are arranged between the tail flue of the waste heat boiler and the gas inlet module of the gas turbine;
b) a hot water outlet pipeline of a waste heat boiler waste heat utilization heat exchanger B is connected to a heat source water inlet valve 8 of a lithium bromide refrigerator, an outlet of the valve 8 is connected to a heat source water inlet of the lithium bromide refrigerator, cold water after heat exchange is connected to a heat source water return valve 9 of the lithium bromide refrigerator from a heat source water outlet of the lithium bromide refrigerator, the valve 9 is connected to an inlet valve 13 of a waste heat boiler waste heat utilization circulating pump, the valve 13 is connected to a waste heat boiler waste heat utilization circulating pump G, the pump G is connected to an outlet valve 14 of the waste heat boiler waste heat utilization circulating pump, the valve 14 is connected to a hot water inlet of the waste heat boiler waste heat utilization heat exchanger B, and the valve 13, the valve 14 and the pump G are provided with a waste heat boiler waste heat utilization circulating pump bypass valve 12;
c) an outlet pipeline is connected to a cooling water inlet valve 6 of the lithium bromide refrigerator from a circulating water pipeline at the outlet of the main engine power tower, the valve 6 is connected to a cooling water inlet of the lithium bromide refrigerator, cooling water return water of the lithium bromide refrigerator is connected to a cooling water return valve 7 of the lithium bromide refrigerator, and the valve 7 is connected to a circulating water pipeline at the inlet of the main engine power tower;
d) the outlet of the chilled water of the lithium bromide refrigerator is connected to an inlet valve 4 of the electric refrigerator, the valve 4 is connected to the hot water side inlet of the electric refrigerator, the chilled water at the outlet of the electric refrigerator is connected to a water inlet valve 1 of a circulating water tank of a gas turbine gas inlet heat exchanger, the outlet of the valve 1 is connected to a circulating water tank I of the gas turbine gas inlet heat exchanger, the outlet of the water tank I is connected to a refrigerating/heating mode switching valve 15, the valve 15 is connected to a circulating pump H of the gas turbine gas inlet heat exchanger, and the outlet of a pump H is connected to the inlet of a gas turbine gas inlet heat exchanger A;
e) a hot water outlet pipeline of the waste heat utilization heat exchanger B of the waste heat boiler is connected with an outlet tee pipeline before a valve 8 and is connected to an electric heater water inlet valve 10, the outlet of the valve 10 is connected to an electric heater E, the outlet of the electric heater E is connected to an outlet valve 2 of the electric heater, and the outlet of the valve 2 is connected to an inlet pipeline of a circulating pump H of an air inlet heat exchanger of the gas turbine;
f) the outlet of the gas turbine air inlet heat exchanger A is connected to the outlet valve 3 of the gas turbine air inlet heat exchanger, the outlet pipeline of the valve 3 is divided into two paths, one path is connected to the refrigerant water inlet valve 5 of the gas turbine air inlet heat exchanger of the hot water type lithium bromide refrigerator, and the valve 5 is connected to the chilled water inlet of the lithium bromide refrigerator; the other path is connected to a bypass valve 11 of a water inlet lithium bromide refrigerator of the waste heat utilization heat exchanger of the waste heat boiler, and an outlet of the valve 11 is connected to a pipeline between a heat source water return valve 9 of the lithium bromide refrigerator and an inlet valve 13 of a waste heat utilization circulating pump of the waste heat boiler.
The two-stage dual-mode gas turbine inlet air temperature regulation waste heat utilization system shown in fig. 1 has two modes of cooling and heating for inlet air temperature regulation of the gas turbine, and both the cooling and the heating have two-stage functions.
When the system is in an air inlet cooling mode, the operation modes of each main device, each valve or each valve group, each switch, each pipeline and each accessory are as follows:
(1) the waste heat utilization heat exchanger B of the waste heat boiler, the photovoltaic and wind power new energy power generation equipment C, the waste heat utilization circulating pump G of the waste heat boiler, the hot water type lithium bromide refrigerator F, the electric refrigerator D, the circulating water tank I of the gas inlet heat exchanger of the gas turbine, the circulating pump H of the gas inlet heat exchanger of the gas turbine and the gas inlet heat exchanger A of the gas turbine normally operate; the E-electric heater stops operating.
(2) The valves 1, 3, 4, 5, 8, 6, 7, 9, 15, 13 and 14 are opened; valves 2, 10, 11, 12 are closed.
(3) The switch S1 is switched to the photovoltaic and wind power new energy power generation equipment C to the electric refrigerator D for power supply, and the switch S2 is switched to the electric heater E for power supply disconnection of the photovoltaic and wind power new energy power generation equipment.
(4) The gas turbine inlet air cooling operation mode is as follows:
the waste heat utilization heat exchanger B of the waste heat boiler absorbs the waste heat of the tail flue of the waste heat boiler to hot water, the high-temperature hot water after heat exchange enters a hot water type lithium bromide refrigerator F, and the heat is transferred to the lithium bromide refrigerator F and then returns to the waste heat utilization heat exchanger B; the lithium bromide refrigerator F is driven by hot water to refrigerate the hot water returned from the gas turbine gas inlet heat exchanger A, and the refrigerated cold water enters the gas turbine gas inlet heat exchanger circulating water tank I; circulating water from the cooling tower enters a lithium bromide refrigerator to take away waste heat, and the circulating water returns to the cooling tower for cooling; and a circulating pump H of the gas turbine air inlet heat exchanger conveys cold water in the water tank I to the gas turbine air inlet heat exchanger A, the air inlet of the gas turbine is cooled, the liquid level in the water tank I is kept stable in operation, and the cold water is heated by hot air and then returns to the lithium bromide refrigerator for continuous cooling.
When the system is in an air inlet heating mode, the operation modes of each main device, each valve or each valve group, each switch, each pipeline and each accessory are as follows:
(1) the waste heat utilization heat exchanger B of the waste heat boiler, the photovoltaic and wind power new energy power generation equipment C, the electric heater E, the circulating pump H of the gas turbine air inlet heat exchanger and the gas turbine air inlet heat exchanger A normally operate; and the hot water type lithium bromide refrigerator F, the electric refrigerator D, the waste heat utilization circulating pump G of the waste heat boiler and the circulating water tank I of the gas inlet heat exchanger of the gas turbine stop working.
(2) The valves 2, 3, 10, 11 and 12 are opened; valve 1, valve 15, valve 4, valve 5, valve 6, valve 7, valve 8 and valve 9 are closed.
(3) The switch S1 is switched to the photovoltaic and wind power new energy power generation equipment C to supply power to the electric heater E, and the switch S2 is switched to the electric heater E to supply power to the photovoltaic and wind power new energy power generation equipment C.
(4) The gas turbine inlet air heating operation mode is as follows:
the waste heat utilization heat exchanger B of the waste heat boiler absorbs the waste heat of the tail flue of the waste heat boiler to hot water, the high-temperature hot water after heat exchange enters the electric heater E to be continuously heated, the liquid level in the electric heater E is stable during operation, the hot water is heated by the electric heater E and then enters the gas turbine air inlet heat exchanger A under the driving of the gas turbine air inlet heat exchanger circulating pump H to heat the inlet air of the gas turbine, and the cooled hot water directly returns to the waste heat utilization heat exchanger B of the waste heat boiler to continuously absorb heat.
As shown in FIG. 1, the inlet air temperature-adjusting waste heat utilization system and method for the two-stage dual-mode gas turbine has the advantages that the outlet air temperature of the gas turbine inlet heat exchanger A can be always kept below the optimal inlet air temperature point of the gas turbine, and therefore the high efficiency of the combined cycle unit in all the time operation is guaranteed.
By utilizing the system and the design of the invention, because the gas inlet system of the gas turbine has the cooling and heating functions, the gas inlet temperature of the gas turbine is always kept in the most economic condition of the combined cycle unit in the environmental condition range of unit operation, and the optimal gas inlet temperature of the combined cycle unit is 25.3 ℃ under the condition of the present example.
Claims (7)
1. The two-stage dual-mode gas turbine air inlet temperature adjustment waste heat utilization system is characterized by comprising a waste heat boiler waste heat utilization heat exchanger (B) arranged at a tail flue of the waste heat boiler, a gas turbine air inlet heat exchanger (A) arranged in a gas turbine air inlet module channel, photovoltaic and wind power new energy power generation equipment (C) arranged near a unit, an electric refrigerator (D), an electric heater (E), a hot water type lithium bromide refrigerator (F) and a gas turbine air inlet heat exchanger circulating water tank (I) which are arranged between the tail flue of the waste heat boiler and the gas turbine air inlet module;
the gas turbine air inlet heat exchanger (A) arranged in the gas turbine air inlet module channel is used for exchanging heat of gas turbine inlet air; the waste heat utilization heat exchanger (B) of the waste heat boiler is used for recovering the waste heat of the flue gas at the tail part of the waste heat boiler and reducing the temperature of the flue gas above 85 ℃ to below 70 ℃; the photovoltaic and wind power new energy power generation equipment (C) is used for generating electric power;
the electric refrigerator (D) is used for further cooling the cold water at the outlet of the lithium bromide refrigerator;
the electric heater (E) is used for further heating the circulating water at the outlet of the waste heat utilization heat exchanger (B) of the waste heat boiler;
the hot water type lithium bromide refrigerator (F) is used for cooling the circulating water returned from the gas turbine air inlet heat exchanger A by utilizing the circulating water energy at the outlet of the waste heat boiler waste heat utilization heat exchanger (B);
the gas turbine air inlet heat exchanger circulating water tank (I) is used for providing a water supply tank for circulating water entering the gas turbine air inlet heat exchanger (A), and the stability of a water supply system is ensured.
2. The system for utilizing the intake temperature-adjusting waste heat of the two-stage dual-mode gas turbine as claimed in claim 1, wherein the waste heat boiler waste heat utilization heat exchanger (B) has a hot water outlet pipeline connected to a hot water inlet valve (8) of the lithium bromide refrigerator, an outlet of the hot water inlet valve (8) of the lithium bromide refrigerator is connected to a hot water inlet of the hot lithium bromide refrigerator (F), the cold water after heat exchange is connected to a hot water return valve (9) of the lithium bromide refrigerator from a hot water outlet of the hot water refrigerator (F), the hot water return valve (9) of the lithium bromide refrigerator is connected to a waste heat utilization circulating pump inlet valve (13) of the waste heat boiler, the waste heat utilization circulating pump inlet valve (13) is connected to a waste heat utilization circulating pump (G) of the waste heat boiler, and the waste heat utilization circulating pump (G) of the waste heat boiler is connected to a waste heat utilization circulating pump outlet (14) of the waste heat utilization circulating pump of the waste heat boiler, an outlet valve (14) of the waste heat utilization circulating pump of the waste heat boiler is connected to a hot water inlet of a waste heat utilization heat exchanger (B) of the waste heat boiler, and an inlet valve (13) of the waste heat utilization circulating pump of the waste heat boiler, an outlet valve (14) of the waste heat utilization circulating pump of the waste heat boiler and a waste heat utilization circulating pump (G) of the waste heat utilization circulating pump of the waste heat boiler are provided with a bypass valve (12) of the waste heat utilization circulating pump of the waste heat boiler.
3. The two-stage dual-mode gas turbine air inlet temperature adjustment waste heat utilization system as claimed in claim 1, wherein an outlet pipeline connected to a circulating water pipeline at an outlet of a main engine power tower is connected to a cooling water inlet valve (6) of a lithium bromide refrigerator, the cooling water inlet valve (6) of the lithium bromide refrigerator is connected to a cooling water inlet of a hot water type lithium bromide refrigerator (7), cooling water return water of the hot water type lithium bromide refrigerator (7) is connected to a cooling water return valve (7) of the lithium bromide refrigerator, and the cooling water return valve (7) of the lithium bromide refrigerator is connected to the circulating water pipeline at the inlet of the main engine power tower.
4. The two-stage dual-mode gas turbine air inlet temperature regulation waste heat utilization system as claimed in claim 1, wherein a chilled water outlet of the hot water type lithium bromide refrigerator (7) is connected to an inlet valve (4) of an electric refrigerator, the inlet valve (4) of the electric refrigerator is connected to a hot water side inlet of the electric refrigerator (D), chilled water at an outlet of the electric refrigerator (D) is connected to a circulating water tank inlet valve (1) of a gas turbine air inlet heat exchanger, an outlet of the circulating water tank inlet valve (1) of the gas turbine air inlet heat exchanger is connected to a circulating water tank (I) of the gas turbine air inlet heat exchanger, an outlet of the circulating water tank (I) of the gas turbine air inlet heat exchanger is connected to a cooling/heating mode switching valve (15), the cooling/heating mode switching valve (15) is connected to a circulating pump (H) of the gas turbine air inlet heat exchanger, and an outlet of the circulating pump (H) of the gas turbine air inlet heat exchanger is connected to an air inlet heat exchanger (A) of the gas turbine And (4) a mouth.
5. The two-stage dual-mode gas turbine air inlet temperature regulation waste heat utilization system as claimed in claim 1, wherein a hot water outlet pipeline of the waste heat boiler waste heat utilization heat exchanger (B) is connected with an electric heater inlet valve (10) through a tee pipeline in front of a lithium bromide refrigerator heat source water inlet valve (8), an outlet of the electric heater inlet valve (10) is connected with an electric heater (E), an outlet of the electric heater (E) is connected with an electric heater outlet valve (2), and an outlet of the electric heater outlet valve (2) is connected with an inlet pipeline of a gas turbine air inlet heat exchanger circulating pump (H).
6. The two-stage dual-mode gas turbine air inlet temperature regulation waste heat utilization system as claimed in claim 1, wherein an outlet of a gas turbine air inlet heat exchanger (A) is connected to an outlet valve (3) of the gas turbine air inlet heat exchanger, an outlet pipeline of the gas turbine air inlet heat exchanger outlet valve (3) is divided into two paths, one path is connected to a refrigerant water inlet valve (5) of a gas turbine air inlet heat exchanger of a hot water type lithium bromide refrigerator, and the refrigerant water inlet valve (5) of the gas turbine air inlet heat exchanger of the hot water type lithium bromide refrigerator is connected to a chilled water inlet of the hot water type lithium bromide refrigerator (F); the other path is connected to a bypass valve (11) of a waste heat boiler waste heat utilization heat exchanger water inlet lithium bromide refrigerator, and an outlet of the bypass valve (11) of the waste heat boiler waste heat utilization heat exchanger water inlet lithium bromide refrigerator is connected to a pipeline between a heat source water return valve (9) of the lithium bromide refrigerator and an inlet valve (13) of a waste heat boiler waste heat utilization circulating pump.
7. The operation method of the two-stage dual-mode gas turbine inlet air temperature regulation waste heat utilization system is characterized in that the inlet air temperature regulation of the gas turbine has two modes of cooling and heating, and the cooling and the heating have two-stage functions;
when the system is in an air inlet cooling mode, the operation modes of each main device, each valve or each valve group, each switch, each pipeline and each accessory are as follows:
(1) the waste heat utilization system comprises a waste heat boiler waste heat utilization heat exchanger (B), photovoltaic and wind power new energy power generation equipment (C), a waste heat boiler waste heat utilization circulating pump (G), a hot water type lithium bromide refrigerator (F), an electric refrigerator (D), a gas turbine air inlet heat exchanger circulating water tank (I), a gas turbine air inlet heat exchanger circulating pump (H) and a gas turbine air inlet heat exchanger (A) which normally operate; the electric heater (E) stops working;
(2) a water inlet valve (1) of a circulating water tank of a gas turbine gas inlet heat exchanger, a gas turbine gas inlet heat exchanger outlet valve (3), an electric refrigerator inlet valve (4), a hot water type lithium bromide refrigerator gas turbine gas inlet heat exchanger coolant water inlet valve (5), a lithium bromide refrigerator heat source water inlet valve (8), a lithium bromide refrigerator cooling water inlet valve (6), a lithium bromide refrigerator cooling water return valve (7), a lithium bromide refrigerator heat source water return valve (9), a refrigeration/heating mode switching valve (15), a waste heat boiler waste heat utilization circulating pump inlet valve (13) and a waste heat boiler waste heat utilization circulating pump outlet valve (14) are opened; an outlet valve (2) of the electric heater, a water inlet valve (10) of the electric heater, a water inlet lithium bromide refrigerator bypass valve (11) of the waste heat utilization heat exchanger of the waste heat boiler and a waste heat utilization circulating pump bypass valve (12) of the waste heat boiler are closed;
(3) the switch (S1) is switched to the photovoltaic and wind power new energy power generation equipment (C) to supply power to the electric refrigerator (D), and the switch (S2) outputs the power of the photovoltaic and wind power new energy power generation equipment to the electric heater (E) to supply power for disconnection;
(4) the gas turbine inlet air cooling operation mode is as follows:
the waste heat utilization heat exchanger (B) of the waste heat boiler absorbs the waste heat of the tail flue of the waste heat boiler to hot water, the high-temperature hot water after heat exchange enters a hot water type lithium bromide refrigerator (F), and the heat is transferred to the lithium bromide refrigerator (F) and then returns to the waste heat utilization heat exchanger (B); the lithium bromide refrigerator (F) is driven by hot water to refrigerate the hot water returned from the gas turbine gas inlet heat exchanger (A), and the refrigerated cold water enters the gas turbine gas inlet heat exchanger circulating water tank (I); circulating water from the cooling tower enters a lithium bromide refrigerator to take away waste heat, and the circulating water returns to the cooling tower for cooling; the cold water in the circulating water tank (I) of the gas turbine gas inlet heat exchanger is conveyed to the gas turbine gas inlet heat exchanger (A) by the gas turbine gas inlet heat exchanger circulating pump (H), the gas turbine gas is cooled, the liquid level in the circulating water tank (I) of the gas turbine gas inlet heat exchanger is kept stable in operation, and the cold water is heated by hot air and then returns to the lithium bromide refrigerator for continuous cooling;
when the system is in an air inlet heating mode, the operation modes of each main device, each valve or each valve group, each switch, each pipeline and each accessory are as follows:
(1) the waste heat utilization heat exchanger (B) of the waste heat boiler, photovoltaic and wind power new energy power generation equipment (C), an electric heater (E), a circulating pump (H) of a gas turbine gas inlet heat exchanger and a gas turbine gas inlet heat exchanger (A) normally operate; the hot water type lithium bromide refrigerator (F), the electric refrigerator (D), the waste heat boiler waste heat utilization circulating pump (G) and the gas turbine air inlet heat exchanger circulating water tank (I) stop working;
(2) an outlet valve (2) of the electric heater, an outlet valve (3) of an air inlet heat exchanger of the gas turbine, an inlet valve (10) of the electric heater, a bypass valve (11) of an inlet lithium bromide refrigerator of the waste heat utilization heat exchanger of the waste heat boiler and a bypass valve (12) of a waste heat utilization circulating pump of the waste heat boiler are opened; a water inlet valve (1) of a circulating water tank of a gas turbine gas inlet heat exchanger, a refrigeration/heating mode switching valve (15), an inlet valve (4) of an electric refrigerator, a refrigerant water inlet valve (5) of a gas turbine gas inlet heat exchanger of a hot water type lithium bromide refrigerator, a cooling water inlet valve (6) of the lithium bromide refrigerator, a cooling water return valve (7) of the lithium bromide refrigerator, a heat source water inlet valve (8) of the lithium bromide refrigerator and a heat source water return valve (9) of the lithium bromide refrigerator are closed;
(3) the switch (S1) is switched to the photovoltaic and wind power new energy power generation equipment (C) to supply power to the electric heater (E), and the switch (S2) outputs the power of the photovoltaic and wind power new energy power generation equipment to the electric heater (E) for power supply connection;
(4) the gas turbine inlet air heating operation mode is as follows:
the waste heat utilization heat exchanger (B) of the waste heat boiler absorbs the waste heat of the tail flue of the waste heat boiler to hot water, the high-temperature hot water after heat exchange enters the electric heater (E) to continue heating, the liquid level in the electric heater (E) is stable during operation, after the electric heater (E) heats, the hot water enters the gas turbine air inlet heat exchanger (A) under the driving of a gas turbine air inlet heat exchanger circulating pump (H), the gas turbine air inlet is heated, and the cooled hot water directly returns to the waste heat utilization heat exchanger (B) of the waste heat boiler to continue absorbing heat.
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