CN114278436B - System and method for utilizing air inlet temperature-regulating waste heat of two-stage dual-mode gas turbine - Google Patents
System and method for utilizing air inlet temperature-regulating waste heat of two-stage dual-mode gas turbine Download PDFInfo
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- CN114278436B CN114278436B CN202111576208.4A CN202111576208A CN114278436B CN 114278436 B CN114278436 B CN 114278436B CN 202111576208 A CN202111576208 A CN 202111576208A CN 114278436 B CN114278436 B CN 114278436B
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- 239000002918 waste heat Substances 0.000 title claims abstract description 215
- 239000007789 gas Substances 0.000 title claims abstract description 171
- 238000000034 method Methods 0.000 title claims abstract description 12
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 234
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 218
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000010248 power generation Methods 0.000 claims abstract description 31
- 239000000498 cooling water Substances 0.000 claims description 28
- 239000002826 coolant Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000003507 refrigerant 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 2
- 239000008400 supply water Substances 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004064 recycling 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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- Engine Equipment That Uses Special Cycles (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a two-stage dual-mode gas turbine air inlet temperature-regulating waste heat utilization system and a method, wherein the system comprises a waste heat boiler waste heat utilization heat exchanger arranged at a tail flue of a waste heat boiler, a gas turbine air inlet heat exchanger arranged in an air inlet module channel of a 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 air inlet heat exchanger circulating water tank arranged between the tail flue of the waste heat boiler and the air inlet module of the gas turbine. The combined cycle unit is operated in two modes of cooling and heating, so that the combined cycle unit is always operated under the working conditions of optimal efficiency and optimal output, the operation safety of the combined cycle unit is improved, and the operation performance of the gas turbine under most environmental conditions all year round is effectively improved.
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 two-stage dual-mode gas turbine air inlet temperature regulation waste heat utilization system and method.
Background
The gas turbine is a prime motor which takes air as working medium, and generates high-temperature and high-pressure gas after the air is compressed and the mixed fuel is combusted, and finally the gas expands to do work. Because the working media participating in the thermodynamic cycle of the gas turbine are all taken from the atmosphere, and the whole system is in open cycle, the power output is greatly affected by the atmospheric conditions. A large number of experiments and operations show that the inlet temperature of the gas turbine has a great influence on the output, heat consumption and exhaust gas temperature of the gas turbine.
After the gas turbine installation site is determined, the atmospheric pressure generally does not change much among the 3 parameters of ambient temperature, ambient humidity and atmospheric pressure, which will vary with the local climate and season. Of both temperature and humidity, temperature has a greater impact on gas turbine performance. In a certain operating range, when the temperature of the inlet air rises, the power and efficiency of the inlet air are reduced, and the heat consumption rate is increased. 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 regulating system on the gas turbine in the region with severe annual air temperature change, and the method becomes an important means for improving the performance of the gas turbine.
The exhaust temperature of the waste heat boiler is generally above 90 ℃ and has larger deviation from the ambient temperature, which causes a great amount of waste of low-quality heat sources 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 air inlet temperature-regulating waste heat utilization system and a method, wherein a temperature regulating system is additionally arranged in an air inlet system of a gas turbine, a heat exchanger, a hot water type lithium bromide refrigerator and other devices are additionally arranged in a tail flue of a waste heat boiler, and a photovoltaic, wind power and other distributed new energy power generation system is additionally arranged, so that the temperature regulating system has two-stage heat exchange, can operate in two modes of cooling and heating, and the combined cycle unit always operates under the optimal efficiency and optimal output working condition, meanwhile, the operation safety of the combined cycle unit is improved, and the operation performance of the gas turbine under most environmental conditions throughout the year is effectively improved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The utility model provides a two-stage bimodulus gas turbine waste heat utilization system that adjusts temperature that admits air, includes waste heat boiler waste heat utilization heat exchanger B who arranges in waste heat boiler afterbody flue, gas turbine air inlet heat exchanger A who arranges in gas turbine air inlet module passageway, photovoltaic and wind-powered electricity generation new forms of energy power generation equipment C who arranges near the unit, electric refrigerator D, electric heater E, hot water type lithium bromide refrigerator F and gas turbine air inlet heat exchanger circulation tank I who arranges between waste heat boiler afterbody flue and gas turbine air inlet module.
The gas turbine air inlet heat exchanger A is arranged in the gas turbine air inlet module channel and is used for exchanging heat for gas turbine air inlet; the waste heat utilization heat exchanger B of the waste heat boiler is used for recycling waste heat of flue gas of a tail flue of the waste heat boiler, and can reduce 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 cold water at the outlet of the lithium bromide refrigerator so as to improve the cooling heat exchange efficiency of the gas turbine inlet heat exchanger A.
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 exchanging efficiency of the gas turbine inlet heat exchanger A.
The hot water type lithium bromide refrigerator F is used for cooling the circulating water returned from the gas turbine 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 circulating water tank I of the gas turbine inlet heat exchanger is used for providing a water supply water tank for circulating water entering the gas turbine inlet heat exchanger A, so that the stability of a water supply system is ensured.
The hot water outlet pipeline of the waste heat boiler waste heat utilization heat exchanger B is connected to the hot water inlet valve 8 of the lithium bromide refrigerator, the outlet of the hot water inlet valve 8 of the lithium bromide refrigerator is connected to the hot water inlet of the hot water type lithium bromide refrigerator F, the cold water after heat exchange is connected to the hot water return valve 9 of the lithium bromide refrigerator F from the hot water outlet of the hot water type lithium bromide refrigerator F, the return valve 9 of the lithium bromide refrigerator heat source water is connected to the waste heat boiler waste heat utilization circulating pump inlet valve 13, the waste heat utilization circulating pump inlet valve 13 is connected to the waste heat boiler waste heat utilization circulating pump G, the waste heat boiler waste heat utilization circulating pump G is connected to the waste heat boiler waste heat utilization circulating pump outlet valve 14, the waste heat boiler waste heat utilization circulating pump inlet valve 13, 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 the waste heat boiler waste heat utilization circulating pump bypass valve 12.
The outlet water pipeline of the main machine power tower is connected with the cooling water inlet valve 6 of the lithium bromide refrigerator, the cooling water inlet valve 6 of the lithium bromide refrigerator is connected with the cooling water inlet of the hot water type lithium bromide refrigerator 7, the cooling water backwater of the hot water type lithium bromide refrigerator 7 is connected with the cooling water backwater valve 7 of the lithium bromide refrigerator, and the cooling water backwater valve 7 of the lithium bromide refrigerator is connected with the inlet water pipeline of the main machine power tower.
The chilled water outlet of the hot water type lithium bromide refrigerator 7 is connected to the electric refrigerator inlet valve 4, the electric refrigerator inlet valve 4 is connected to the hot water side inlet of the electric refrigerator D, chilled water at the outlet of the electric refrigerator D is connected to the gas turbine air inlet heat exchanger circulating water tank water inlet valve 1, the outlet of the gas turbine air inlet heat exchanger circulating water tank water inlet valve 1 is connected to the gas turbine air inlet heat exchanger circulating water tank I, the outlet of the gas turbine air inlet heat exchanger circulating water tank I is connected to the refrigerating/heating mode switching valve 15, the refrigerating/heating mode switching valve 15 is connected to the gas turbine air inlet heat exchanger circulating pump H, and the outlet of the gas turbine air inlet heat exchanger circulating pump H is connected to the inlet of the gas turbine air inlet heat exchanger A.
The waste heat boiler waste heat utilization heat exchanger B hot water outlet pipeline is connected to the electric heater water inlet valve 10 through the three-way pipeline before the lithium bromide refrigerator heat source water inlet valve 8, the outlet of the electric heater water inlet valve 10 is connected to the electric heater E, the outlet of the electric heater E is connected to the electric heater outlet valve 2, and the outlet of the electric heater outlet valve 2 is connected to the inlet pipeline of the gas turbine air inlet heat exchanger circulating pump H.
The outlet of the gas turbine air inlet heat exchanger A is connected to the gas turbine air inlet heat exchanger outlet valve 3, 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 hot water type lithium bromide refrigerator gas turbine air inlet heat exchanger coolant water inlet valve 5, and the hot water type lithium bromide refrigerator gas turbine air inlet heat exchanger coolant water inlet valve 5 is connected to the hot water type lithium bromide refrigerator F coolant water inlet; the other path is connected to a bypass valve 11 of the lithium bromide refrigerator fed by the waste heat boiler waste heat utilization heat exchanger, and an outlet of the bypass valve 11 of the lithium bromide refrigerator fed by the waste heat boiler waste heat utilization heat exchanger is connected to a pipeline between a heat source water backwater 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 operation method of the two-stage dual-mode gas turbine air inlet temperature regulation waste heat utilization system comprises two modes of cooling and heating of the gas turbine air inlet temperature regulation, and the cooling and heating have two-stage functions;
When the system is in an air inlet cooling mode, the operation modes of each main device, valve or valve group, switch, pipeline and accessories are as follows:
(1) The waste heat boiler waste heat utilization heat exchanger B, the photovoltaic and wind power new energy power generation equipment C, the waste heat boiler waste heat utilization circulating pump G, the hot water type lithium bromide refrigerator F, the electric refrigerator D, the gas turbine air inlet heat exchanger circulating water tank I, the gas turbine air inlet heat exchanger circulating pump H and the gas turbine air inlet heat exchanger A are operated normally; the electric heater E stops working;
(2) The method comprises the steps of opening a gas turbine inlet heat exchanger circulating water tank inlet valve 1, a gas turbine inlet heat exchanger outlet valve 3, an electric refrigerator inlet valve 4, a hot water type lithium bromide refrigerator gas turbine 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; the outlet valve 2 of the electric heater, the water inlet valve 10 of the electric heater, the bypass valve 11 of the lithium bromide refrigerator for water inlet of the waste heat boiler waste heat utilization heat exchanger and the bypass valve 12 of the waste heat boiler waste heat utilization circulating pump 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 power output of the photovoltaic and wind power new energy power generation equipment of the switch S2 is switched to the electric heater E to disconnect the power supply;
(4) The gas turbine inlet air cooling operation mode is as follows:
the waste heat of the tail flue of the waste heat boiler is absorbed into hot water by the waste heat utilization heat exchanger B, the hot water after heat exchange enters the hot water type lithium bromide refrigerator F, and the heat is transferred to the lithium bromide refrigerator F and then returned to the waste heat utilization heat exchanger B; the lithium bromide refrigerator F is driven by hot water to refrigerate hot water returned from the gas turbine inlet heat exchanger A, and the refrigerated cold water enters the gas turbine inlet heat exchanger circulating water tank I; circulating water from the cooling tower enters a lithium bromide refrigerator to take away waste heat, and returns to the cooling tower for cooling; the circulating pump H of the gas turbine inlet heat exchanger conveys cold water in the water tank I to the gas turbine inlet heat exchanger A to cool the gas turbine inlet, 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, valve or valve group, switch, pipeline and accessories 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 gas turbine inlet heat exchanger circulating pump H and the gas turbine inlet heat exchanger A are normally operated; 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 turbine air inlet heat exchanger stop working;
(2) The electric heater outlet valve 2, the gas turbine inlet heat exchanger outlet valve 3, the electric heater inlet valve 10, the waste heat boiler waste heat utilization heat exchanger inlet lithium bromide refrigerator bypass valve 11 and the waste heat boiler waste heat utilization circulating pump bypass valve 12 are opened; the gas turbine inlet heat exchanger circulating water tank inlet valve 1, the refrigerating/heating mode switching valve 15, the electric refrigerator inlet valve 4, the hot water type lithium bromide refrigerator gas turbine inlet heat exchanger refrigerant water inlet valve 5, the lithium bromide refrigerator cooling water inlet valve 6, the lithium bromide refrigerator cooling water return valve 7, the lithium bromide refrigerator heat source water inlet valve 8 and the lithium bromide refrigerator heat source water return 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 outputs the power of the photovoltaic and wind power new energy power generation equipment to the electric heater E to supply power to be connected;
(4) The gas turbine inlet air heating operation mode is as follows:
the waste heat of the tail flue of the waste heat boiler is absorbed into hot water by the waste heat utilization heat exchanger B, the hot water after heat exchange enters the electric heater E to continue heating, the liquid level in the electric heater E is stable in operation, after the hot water is heated by the electric heater E, the hot water 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 air inlet of the gas turbine, and the cooled hot water is directly returned to the waste heat utilization heat exchanger B to continue absorbing heat.
The invention has the beneficial effects that:
1. By adopting the technical scheme, the waste heat utilization of the combined cycle unit can be realized, and the whole operation efficiency of the unit is obviously improved due to the adoption of new energy power generation systems such as photovoltaic, wind power and the like as secondary heating or refrigerating energy sources;
2. by adopting the technical scheme, the gas turbine air inlet temperature regulating system can work in two modes of heating and cooling, and the air inlet temperature of the gas turbine can always meet the requirement that the combined cycle unit works at the optimal air inlet temperature, so that the unit has stronger economic operation flexibility;
3. By adopting the technical scheme of the invention, the summer output of the combined cycle unit can be obviously improved, meanwhile, the icing phenomenon of the gas turbine air inlet system in winter is avoided, and the operation safety of the combined cycle unit is improved.
Drawings
FIG. 1 is a schematic diagram of a system according to the present invention.
Reference numerals illustrate:
A-the gas turbine intake heat exchanger; b-waste heat utilization heat exchanger of waste heat boiler; c-photovoltaic and wind power new energy power generation equipment; d-an electric refrigerator; e-an electric heater; f-hot water type lithium bromide refrigerator; g-waste heat boiler waste heat utilization circulating pump; an H-gas turbine inlet heat exchanger circulating pump; i-gas turbine inlet heat exchanger circulating water tank.
1-A water inlet valve of a circulating water tank of an air inlet heat exchanger of a gas turbine; 2-an electric heater outlet valve; 3-gas turbine inlet heat exchanger outlet valve; 4-an inlet valve of an electric refrigerator; a refrigerant water inlet valve of an air inlet heat exchanger of a gas turbine of the 5-hot water type lithium bromide refrigerator; 6-lithium bromide refrigerator cooling water inlet valve; 7-lithium bromide refrigerator cooling water backwater valve; heat source water inlet valve of 8-lithium bromide refrigerator; a heat source water return valve of the 9-lithium bromide refrigerator; 10-an electric heater water inlet valve; 11-a bypass valve of a lithium bromide refrigerator for water inlet of a waste heat utilization heat exchanger of a waste heat boiler; 12-a bypass valve of a waste heat utilization circulating pump of a waste heat boiler; 13-an inlet valve of a waste heat utilization circulating pump of a waste heat boiler; 14-an outlet valve of a waste heat utilization circulating pump of a waste heat boiler; 15-cooling/heating mode switching valve.
S1-a switch and a switch-off switch of the photovoltaic and wind power new energy power generation equipment for outputting power to the electric refrigerator D and the electric heater E; s2-the power output of the photovoltaic and wind power new energy power generation equipment is output to a turn-off switch of the electric heater E.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The system is characterized in that a module 1 is added on the basis of a conventional combined cycle unit, and the module 1 mainly comprises main equipment, a valve or a valve group, a switch, a pipeline and accessories:
Wherein, the main equipment in the module 1 comprises:
A-the gas turbine intake heat exchanger; b-waste heat utilization heat exchanger of waste heat boiler; c-photovoltaic and wind power new energy power generation equipment; d-an electric refrigerator; e-an electric heater; f-hot water type lithium bromide refrigerator; g-waste heat boiler waste heat utilization circulating pump; an H-gas turbine inlet heat exchanger circulating pump; i-gas turbine inlet heat exchanger circulating water tank.
Wherein the valve or valves in module 1 comprise:
1-a water inlet valve of a circulating water tank of an air inlet heat exchanger of a gas turbine; 2-an electric heater outlet valve; 3-gas turbine inlet heat exchanger outlet valve; 4-an inlet valve of an electric refrigerator; a refrigerant water inlet valve of an air inlet heat exchanger of a gas turbine of the 5-hot water type lithium bromide refrigerator; 6-lithium bromide refrigerator cooling water inlet valve; 7-lithium bromide refrigerator cooling water backwater valve; heat source water inlet valve of 8-lithium bromide refrigerator; a heat source water return valve of the 9-lithium bromide refrigerator; 10-an electric heater water inlet valve; 11-a bypass valve of a lithium bromide refrigerator for water inlet of a waste heat utilization heat exchanger of a waste heat boiler; 12-a bypass valve of a waste heat utilization circulating pump of a waste heat boiler; 13-an inlet valve of a waste heat utilization circulating pump of a waste heat boiler; 14-an outlet valve of a waste heat utilization circulating pump of a waste heat boiler; 15-cooling/heating mode switching valve.
Wherein the switch in module 1 comprises:
s1-a switch and a switch-off switch of the photovoltaic and wind power new energy power generation equipment for outputting power to the electric refrigerator D and the electric heater E; s2-the power output of the photovoltaic and wind power new energy power generation equipment is output to a turn-off switch of the electric heater E.
The system and the method for utilizing the intake temperature-regulating waste heat of the two-stage dual-mode gas turbine as shown in fig. 1 are characterized in that the connection modes of the devices added in the module 1 are as follows:
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 turbine air inlet heat exchanger A is arranged in a gas turbine air inlet module channel, 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 gas turbine air inlet heat exchanger circulating water tank I are arranged between the tail flue of the waste heat boiler and the gas turbine air inlet module;
b) The hot water outlet pipeline of the waste heat boiler waste heat utilization heat exchanger B is connected to the hot water inlet valve 8 of the lithium bromide refrigerator, the outlet of the valve 8 is connected to the hot water inlet of the lithium bromide refrigerator, the cold water after heat exchange is connected to the hot water return valve 9 of the lithium bromide refrigerator from the hot water outlet of the lithium bromide refrigerator, the valve 9 is connected to the inlet valve 13 of the waste heat boiler waste heat utilization circulating pump, the valve 13 is connected to the waste heat boiler waste heat utilization circulating pump G, the pump G is connected to the outlet valve 14 of the waste heat boiler waste heat utilization circulating pump, the valve 14 is connected to the 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 the waste heat boiler waste heat utilization circulating pump bypass valve 12;
c) The outlet water pipeline of the main machine power tower is connected with a pipeline connected with a cooling water inlet valve 6 of the lithium bromide refrigerator, the valve 6 is connected with a cooling water inlet of the lithium bromide refrigerator, cooling water return water of the lithium bromide refrigerator is connected with a cooling water return valve 7 of the lithium bromide refrigerator, and the valve 7 is connected with the inlet water pipeline of the main machine power tower;
d) The outlet of the valve 1 is connected to the circulating water tank I of the gas turbine air inlet heat exchanger, the outlet of the water tank I is connected to the refrigerating/heating mode switching valve 15, the valve 15 is connected to the circulating pump H of the gas turbine air inlet heat exchanger, and the outlet of the pump H is connected to the inlet of the gas turbine air inlet heat exchanger A;
e) The outlet of the valve 10 is connected to the electric heater E, the outlet of the electric heater E is connected to the electric heater outlet valve 2, and the outlet of the valve 2 is connected to the inlet pipeline of the circulating pump H of the gas turbine inlet heat exchanger;
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 hot water type lithium bromide refrigerator gas turbine air inlet heat exchanger, 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 the lithium bromide refrigerator for water inlet of the waste heat boiler waste heat utilization heat exchanger, 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 the waste heat boiler waste heat utilization circulating pump.
The two-stage dual-mode gas turbine inlet air temperature adjustment waste heat utilization system shown in fig. 1 has two modes of cooling and heating for gas turbine inlet air temperature adjustment, and the cooling and heating have two-stage functions.
When the system is in an air inlet cooling mode, the operation modes of each main device, valve or valve group, switch, pipeline and accessories are as follows:
(1) The waste heat boiler waste heat utilization heat exchanger B, the photovoltaic and wind power new energy power generation equipment C, the waste heat boiler waste heat utilization circulating pump G, the hot water type lithium bromide refrigerator F, the electric refrigerator D, the gas turbine air inlet heat exchanger circulating water tank I, the gas turbine air inlet heat exchanger circulating pump H and the gas turbine air inlet heat exchanger A are operated normally; the E-motor heater stops working.
(2) Valve 1, valve 3, valve 4, valve 5, valve 8, valve 6, valve 7, valve 9, valve 15, valve 13, valve 14 are opened; valve 2, valve 10, valve 11, valve 12 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 power output of the photovoltaic and wind power new energy power generation equipment of the switch S2 is switched to the electric heater E to disconnect the power supply.
(4) The gas turbine inlet air cooling operation mode is as follows:
The waste heat of the tail flue of the waste heat boiler is absorbed into hot water by the waste heat utilization heat exchanger B, the hot water after heat exchange enters the hot water type lithium bromide refrigerator F, and the heat is transferred to the lithium bromide refrigerator F and then returned to the waste heat utilization heat exchanger B; the lithium bromide refrigerator F is driven by hot water to refrigerate hot water returned from the gas turbine inlet heat exchanger A, and the refrigerated cold water enters the gas turbine inlet heat exchanger circulating water tank I; circulating water from the cooling tower enters a lithium bromide refrigerator to take away waste heat, and returns to the cooling tower for cooling; the circulating pump H of the gas turbine inlet heat exchanger conveys cold water in the water tank I to the gas turbine inlet heat exchanger A to cool the gas turbine inlet, 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, valve or valve group, switch, pipeline and accessories 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 gas turbine inlet heat exchanger circulating pump H and the gas turbine inlet heat exchanger A are normally operated; 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 turbine air inlet heat exchanger stop working.
(2) Valve 2, valve 3, valve 10, valve 11 and valve 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 outputs the power of the photovoltaic and wind power new energy power generation equipment to the electric heater E to supply power to be connected.
(4) The gas turbine inlet air heating operation mode is as follows:
the waste heat of the tail flue of the waste heat boiler is absorbed into hot water by the waste heat utilization heat exchanger B, the hot water after heat exchange enters the electric heater E to continue heating, the liquid level in the electric heater E is stable in operation, after the hot water is heated by the electric heater E, the hot water 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 air inlet of the gas turbine, and the cooled hot water is directly returned to the waste heat utilization heat exchanger B to continue absorbing heat.
According to the two-stage dual-mode gas turbine air inlet temperature-regulating waste heat utilization system and method shown in FIG. 1, the temperature of air at the outlet of the gas turbine air inlet heat exchanger A can be always kept at the optimal air inlet temperature point of the gas turbine, so that the high efficiency of the combined cycle unit in running all the time is ensured.
By utilizing the system and the design of the invention, as the gas turbine air inlet system has the functions of cooling and heating, the air inlet temperature of the gas turbine can be ensured to be always kept under the most economical condition of the combined cycle unit in the range of the environmental condition of unit operation, and the optimal air inlet temperature of the combined cycle unit is 25.3 ℃ under the condition of the calculation example.
Claims (2)
1. The two-stage dual-mode gas turbine air inlet temperature regulation waste heat utilization system is characterized by comprising a waste heat boiler waste heat utilization heat exchanger (B) arranged at a tail flue of a waste heat boiler, a gas turbine air inlet heat exchanger (A) arranged in an air inlet module channel of a gas turbine, 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) arranged between the tail flue of the waste heat boiler and the air inlet module of the gas turbine;
A gas turbine inlet heat exchanger (A) arranged in a gas turbine inlet module passage for exchanging heat of gas turbine inlet air; the waste heat utilization heat exchanger (B) of the waste heat boiler is used for recovering waste heat of flue gas of a tail flue 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 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 at the outlet of the waste heat utilization heat exchanger (B) of the waste heat boiler;
the circulating water tank (I) of the gas turbine inlet heat exchanger is used for providing a water supply water tank for circulating water entering the gas turbine inlet heat exchanger (A), so that 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 the lithium bromide refrigerator heat source water inlet valve (8), the outlet of the lithium bromide refrigerator heat source water inlet valve (8) is connected to the hot water type lithium bromide refrigerator (F) heat source water inlet, the cold water after heat exchange is connected to the lithium bromide refrigerator heat source water backwater valve (9) from the hot water type lithium bromide refrigerator (F) heat source water outlet, the lithium bromide refrigerator heat source water backwater valve (9) is connected to the waste heat boiler waste heat utilization circulating pump inlet valve (13), the waste heat utilization circulating pump inlet valve (13) is connected to the waste heat boiler waste heat utilization circulating pump (G), the waste heat boiler waste heat utilization circulating pump (G) is connected to the waste heat boiler waste heat utilization circulating pump outlet valve (14), the waste heat boiler waste heat utilization circulating pump inlet valve (13), 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 the waste heat utilization circulating pump bypass valve (12);
the outlet water pipeline of the main machine power tower is connected with a pipeline connected with a lithium bromide refrigerator cooling water inlet valve (6), the lithium bromide refrigerator cooling water inlet valve (6) is connected with a hot water type lithium bromide refrigerator (F) cooling water inlet, the cooling water return water of the hot water type lithium bromide refrigerator (F) is connected with a lithium bromide refrigerator cooling water return valve (7), and the lithium bromide refrigerator cooling water return valve (7) is connected with the main machine power tower inlet water pipeline;
The hot water type lithium bromide refrigerator comprises a hot water type lithium bromide refrigerator (F), a refrigerating water inlet valve (4), a refrigerating water inlet valve (1), a gas turbine air inlet heat exchanger circulating water tank (I), a refrigerating/heating mode switching valve (15) and a gas turbine air inlet heat exchanger circulating pump (H), wherein the refrigerating water inlet valve (4) is connected to a hot water side inlet of the electric refrigerator (D);
The waste heat boiler waste heat utilization heat exchanger (B) is characterized in that a hot water outlet pipeline is connected to an electric heater water inlet valve (10) from a front end of a heat source water inlet valve (8) of the lithium bromide refrigerator, 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 a gas turbine air inlet heat exchanger outlet valve (3), 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 hot water type lithium bromide refrigerator gas turbine air inlet heat exchanger coolant water inlet valve (5), and the hot water type lithium bromide refrigerator gas turbine air inlet heat exchanger coolant water inlet valve (5) is connected to a hot water type lithium bromide refrigerator (F) coolant water inlet; the other path is connected to a bypass valve (11) of the lithium bromide refrigerator fed by the waste heat boiler waste heat utilization heat exchanger, and an outlet of the bypass valve (11) of the lithium bromide refrigerator fed by the waste heat boiler waste heat utilization heat exchanger is connected to a pipeline between a heat source water backwater valve (9) of the lithium bromide refrigerator and an inlet valve (13) of a waste heat boiler waste heat utilization circulating pump.
2. The operation method based on the two-stage dual-mode gas turbine air inlet temperature regulation waste heat utilization system is characterized by comprising two modes of cooling and heating of the gas turbine air inlet temperature regulation, and the cooling and heating have two-stage functions;
When the system is in an air inlet cooling mode, the operation modes of each main device, valve or valve group, switch, pipeline and accessories are as follows:
(1) The waste heat boiler waste heat utilization heat exchanger (B), the photovoltaic and wind power new energy power generation equipment (C), the waste heat boiler waste heat utilization circulating pump (G), the hot water type lithium bromide refrigerator (F), the electric refrigerator (D), the gas turbine air inlet heat exchanger circulating water tank (I), the gas turbine air inlet heat exchanger circulating pump (H) and the gas turbine air inlet heat exchanger (A) are operated normally; the electric heater (E) stops working;
(2) The method comprises the steps of opening a gas turbine inlet heat exchanger circulating water tank inlet valve (1), a gas turbine inlet heat exchanger outlet valve (3), an electric refrigerator inlet valve (4), a hot water type lithium bromide refrigerator gas turbine inlet heat exchanger refrigerant 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); the electric heater outlet valve (2), the electric heater water inlet valve (10), the waste heat boiler waste heat utilization heat exchanger water inlet lithium bromide refrigerator bypass valve (11) and the waste heat boiler waste heat utilization circulating pump bypass valve (12) are closed;
(3) The first 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 second switch (S2) is switched to the electric heater (E) to supply power to be disconnected;
(4) The gas turbine inlet air cooling operation mode is as follows:
The waste heat of the tail flue of the waste heat boiler is absorbed into hot water by the waste heat utilization heat exchanger (B), the hot water after heat exchange enters the hot water type lithium bromide refrigerator (F), and heat is transferred to the lithium bromide refrigerator (F) and then returned to the waste heat utilization heat exchanger (B); the lithium bromide refrigerator (F) is driven by hot water to refrigerate hot water returned from the gas turbine inlet heat exchanger (A), and the refrigerated cold water enters the gas turbine inlet heat exchanger circulating water tank (I); circulating water from the cooling tower enters a lithium bromide refrigerator to take away waste heat, and returns to the cooling tower for cooling; the cold water in the circulating water tank (I) of the gas turbine inlet heat exchanger is conveyed to the gas turbine inlet heat exchanger (A) by the circulating pump (H) of the gas turbine inlet heat exchanger, the gas turbine inlet air is cooled, the liquid level in the circulating water tank (I) of the gas turbine inlet heat exchanger is kept stable in operation, and the cold water is heated by hot air and then returned 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, valve or valve group, switch, pipeline and accessories 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 gas turbine inlet heat exchanger circulating pump (H) and the gas turbine inlet heat exchanger (A) are operated normally; 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 turbine air inlet heat exchanger stop working;
(2) An electric heater outlet valve (2), a gas turbine inlet heat exchanger outlet valve (3), an electric heater inlet valve (10), a waste heat boiler waste heat utilization heat exchanger inlet lithium bromide refrigerator bypass valve (11) and a waste heat boiler waste heat utilization circulating pump bypass valve (12) are opened; the gas turbine inlet heat exchanger circulating water tank water inlet valve (1), the refrigerating/heating mode switching valve (15), the electric refrigerator inlet valve (4), the hot water type lithium bromide refrigerator gas turbine inlet heat exchanger refrigerant water inlet valve (5), the lithium bromide refrigerator cooling water inlet valve (6), the lithium bromide refrigerator cooling water return valve (7), the lithium bromide refrigerator heat source water inlet valve (8) and the lithium bromide refrigerator heat source water return valve (9) are closed;
(3) The first 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 second switch (S2) outputs the power of the photovoltaic and wind power new energy power generation equipment to the electric heater (E) to supply power to be turned on;
(4) The gas turbine inlet air heating operation mode is as follows:
Waste heat of a tail flue of the waste heat boiler is absorbed into hot water by the waste heat utilization heat exchanger (B), the hot water after heat exchange enters the electric heater (E) to be heated continuously, the liquid level in the electric heater (E) is stable in operation, after the electric heater (E) is heated, the hot water enters the gas turbine air inlet heat exchanger (A) under the driving of the gas turbine air inlet heat exchanger circulating pump (H), the air inlet of the gas turbine is heated, and the cooled hot water is directly returned to the waste heat utilization heat exchanger (B) to absorb heat continuously.
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| US7124589B2 (en) * | 2003-12-22 | 2006-10-24 | David Neary | Power cogeneration system and apparatus means for improved high thermal efficiencies and ultra-low emissions |
| JP2007064049A (en) * | 2005-08-30 | 2007-03-15 | Hitachi Eng Co Ltd | Waste heat recovery system for gas turbine cogeneration equipment |
| US7644573B2 (en) * | 2006-04-18 | 2010-01-12 | General Electric Company | Gas turbine inlet conditioning system and method |
| KR100893828B1 (en) * | 2007-11-02 | 2009-04-20 | 지에스건설 주식회사 | Hybrid heat pump system for cooling and heating with integrated power generation system |
| CN103696855B (en) * | 2013-12-17 | 2017-02-15 | 中国能源建设集团浙江省电力设计院有限公司 | Integrated system for heating and cooling inflow air of gas turbine |
| CN104912669B (en) * | 2015-06-25 | 2017-06-06 | 上海电气燃气轮机有限公司 | The air inlet air conditioning system and its application method of Combined cycle gas-steam turbine power plant |
| CN105822431B (en) * | 2016-04-29 | 2018-01-09 | 西安热工研究院有限公司 | The combined cycle afterheat utilizing system of the high/low intake air temperature of compressor can be stabilized |
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