CN114961909B - Photo-thermal steam cycle and gas turbine steam cycle combined power generation system - Google Patents
Photo-thermal steam cycle and gas turbine steam cycle combined power generation system Download PDFInfo
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- CN114961909B CN114961909B CN202210536786.3A CN202210536786A CN114961909B CN 114961909 B CN114961909 B CN 114961909B CN 202210536786 A CN202210536786 A CN 202210536786A CN 114961909 B CN114961909 B CN 114961909B
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- 238000010248 power generation Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 123
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000003546 flue gas Substances 0.000 claims abstract description 67
- 239000002918 waste heat Substances 0.000 claims abstract description 55
- 239000007789 gas Substances 0.000 claims abstract description 41
- 239000000779 smoke Substances 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 52
- 239000002184 metal Substances 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 20
- 238000009423 ventilation Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
- F03G6/064—Devices for producing mechanical power from solar energy with solar energy concentrating means having a gas turbine cycle, i.e. compressor and gas turbine combination
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
- F03G6/068—Devices for producing mechanical power from solar energy with solar energy concentrating means having other power cycles, e.g. Stirling or transcritical, supercritical cycles; combined with other power sources, e.g. wind, gas or nuclear
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a photo-thermal steam cycle and gas turbine steam cycle combined power generation system, which comprises: the steam cycle power generation device comprises a second generator and a waste heat boiler, a steam turbine, a condenser and a water supply pump which are sequentially connected, the water supply pump comprises a water inlet and a water outlet, the water inlet is connected with a condensate water outlet of the condenser, the water outlet is connected with a first water injection port of the waste heat boiler, the photo-thermal heat exchange device comprises a flue gas inlet, a water inlet and a water outlet, the flue gas inlet is connected with a smoke outlet of the waste heat boiler, the water inlet is connected with a water outlet of the water supply pump, and the water outlet is connected with a second water injection port of the waste heat boiler. The photo-thermal steam cycle and gas turbine steam cycle combined power generation system provided by the embodiment of the invention has the advantage of high flue gas utilization rate.
Description
Technical Field
The invention relates to the technical field of fuel gas-steam combined cycle power generation, in particular to a photo-thermal steam cycle and gas turbine steam cycle combined power generation system.
Background
The gas-steam combined cycle is that the flue gas of a gas turbine is introduced into a waste heat boiler, and water in the waste heat boiler is heated by the flue gas to generate high-temperature and high-pressure steam so as to drive the steam turbine to drive a generator to generate electricity. The flue gas in the waste heat boiler after heat exchange with water also has a certain temperature, and in the related technology, the flue gas in the waste heat boiler after heat exchange with water is directly discharged, so that the utilization rate of the flue gas is greatly reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides a photo-thermal steam cycle and gas turbine steam cycle combined power generation system, which has the advantage of less fuel use.
The photo-thermal steam cycle and gas turbine steam cycle combined power generation system of the embodiment of the invention comprises: a gas turbine power plant comprising a gas turbine assembly and a first generator, the gas turbine assembly comprising a turbine coupled to the first generator for driving the first generator to generate power; the steam cycle power generation device comprises a second generator, a waste heat boiler, a steam turbine, a condenser and a water supply pump, wherein the waste heat boiler comprises a smoke inlet, a smoke outlet, a steam discharge port, a first water injection port and a second water injection port, the smoke inlet is connected with a smoke outlet of the turbine, the steam turbine is connected with the second generator so as to drive the second generator to generate power, the condenser is connected with the steam turbine so as to cool steam discharged by the steam turbine into condensed water, the water supply pump comprises a water inlet and a water outlet, the water inlet is connected with a condensed water outlet of the condenser, and the water outlet is connected with the first water injection port of the waste heat boiler so as to convey part of the condensed water into the waste heat boiler; and the photo-thermal heat exchange device comprises a flue gas inlet, a water inlet and a water outlet, wherein the flue gas inlet is connected with the smoke outlet of the waste heat boiler so that flue gas in the waste heat boiler is introduced into the photo-thermal heat exchange device, the water inlet is connected with the water outlet of the water supply pump, and the water outlet is connected with the second water injection port of the waste heat boiler.
According to the photo-thermal steam cycle and gas turbine steam cycle combined power generation system, the flue gas subjected to heat exchange in the waste heat boiler is led into the photo-thermal heat exchange device, and meanwhile, part of condensed water is led into the photo-thermal heat exchange device through the water feeding pump, so that the part of condensed water can be preheated by utilizing the waste heat of the flue gas. In addition, the photo-thermal heat exchange device can heat the flue gas in the photo-thermal heat exchange device by utilizing solar heat energy, so that the heated flue gas exchanges heat with the part of condensed water, the temperature of the condensed water is further improved, and finally the heated condensed water is introduced into the waste heat boiler, so that the efficiency of steam generation in the waste heat boiler is increased, and the power generation efficiency of the steam turbine is further increased.
Therefore, the photo-thermal steam cycle and gas turbine steam cycle combined power generation system provided by the embodiment of the invention has the advantage of high flue gas utilization rate.
In some embodiments, the photo-thermal heat exchange device comprises a solar heat collection assembly and an energy exchange assembly, the solar heat collection assembly comprises a first heating pipe, the energy exchange assembly comprises a first heat exchange pipe and a second heat exchange pipe, one end of the first heating pipe is connected with the flue gas inlet, the other end of the first heating pipe is connected with one end of the first heat exchange pipe, the other end of the first heat exchange pipe is connected with a flue outlet of the photo-thermal heat exchange device, the second heat exchange pipe is communicated with the water inlet and the water outlet, and the first heating pipe is arranged adjacent to the second heat exchange pipe so as to preheat the second heat exchange pipe.
In some embodiments, the first heating tube is a metal tube, and an outer wall of the first heating tube is coated with a selective absorbing coating.
In some embodiments, the solar collector assembly further comprises a first glass tube, at least a portion of which is sleeved outside the first heating tube.
In some embodiments, a first annular cavity is formed between the first glass tube and the first heating tube, the first annular cavity being a vacuum cavity.
In some embodiments, the flue inlet is connected to the turbine through a ventilation pipeline, the ventilation pipeline is provided with a first inlet and a second inlet, the solar heat collection assembly further comprises a second heating pipe, the second heating pipe is communicated with the first inlet and the second inlet, and the second heating pipe is a metal pipe.
In some embodiments, the solar collector assembly further comprises a second glass tube sleeved outside the second heating tube.
In some embodiments, a second annular cavity is formed between the second glass tube and the second heating tube, the second annular cavity being a vacuum cavity.
In some embodiments, the gas turbine assembly further comprises a compressor for absorbing and compressing air, and a combustor for combusting the compressed air with a fuel and generating a high temperature and high pressure gas, the compressor, the combustor, and the turbine being connected in sequence.
In some embodiments, the compressor and the turbine are coaxially disposed.
Drawings
Fig. 1 is a schematic structural diagram of a combined photo-thermal steam cycle and gas turbine steam cycle power generation system according to an embodiment of the present invention.
Reference numerals:
A ventilation line 10; a first inlet 101; a second inlet 102;
A gas turbine power generation apparatus 1; a compressor 11; a combustion chamber 12; a turbine 13; a first generator 14;
a steam cycle power generation device 2; a waste heat boiler 21; a smoke inlet 211; a smoke outlet 212; a steam outlet 213; a first water filling port 214; a second water filling port 215; a steam turbine 22; a steam inlet 221; a steam outlet 222; a condenser 23; a steam inlet 231; a condensed water outlet 232; a water feed pump 24; a water inlet 241; a water outlet 242; a second generator 25;
a photo-thermal heat exchange device 3; a flue gas inlet 31; a flue gas outlet 32; a water passage port 33; a drain opening 34.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1, the photo-thermal steam cycle and gas turbine steam cycle combined power generation system according to the embodiment of the invention includes: a gas turbine power generation device 1, a steam cycle power generation device 2 and a photo-thermal heat exchange device 3.
The gas turbine power plant 1 comprises a gas turbine assembly and a first generator 14, the gas turbine assembly comprising a turbine 13, the turbine 13 being connected to the first generator 14 for driving the first generator 14 to generate power. Specifically, the output shaft of the turbine 13 is connected with the rotating shaft of the first generator 14, so that when the output shaft of the turbine 13 is driven to rotate, the rotating shaft of the first generator 14 is driven to rotate, thereby realizing the power generation function,
The steam cycle power generation device 2 comprises a second generator 25, a waste heat boiler 21, a steam turbine 22, a condenser 23 and a water supply pump 24, wherein the waste heat boiler 21 comprises a smoke inlet 211, a smoke outlet 212, a steam outlet 213, a first water injection port 214 and a second water injection port 215, the smoke inlet 211 is connected with a smoke outlet of the turbine 13, and the steam turbine 22 is connected with the second generator 25 so as to drive the second generator 25 to generate power. A condenser 23 is connected to the turbine 22 to cool the steam discharged from the turbine 22 into condensed water. The feed pump 24 includes a water inlet 241 connected to the condensed water outlet 232 of the condenser 23, and a water outlet 242 connected to the first water injection port 214 of the waste heat boiler 21 so as to deliver a portion of the condensed water into the waste heat boiler 21.
Specifically, as shown in fig. 1, the exhaust-heat boiler 21, the steam turbine 22, the condenser 23 and the feed pump 24 are sequentially connected through a pipe, that is, the steam outlet 213 of the exhaust-heat boiler 21 is connected with the steam inlet 221 of the steam turbine 22 through a pipe, the steam outlet 222 of the steam turbine 22 is connected with the steam inlet 231 of the condenser 23 through a pipe, the water outlet 242 of the condenser 23 is connected with the water inlet 241 of the feed pump 24 through a pipe, and the water outlet 242 of the feed pump 24 is connected with the first water inlet 214 of the exhaust-heat boiler 21 through a pipe.
It will be appreciated that the flue gas exhausted from the turbine 13 may be introduced into the waste heat boiler 21 through the flue gas outlet of the turbine 13 and the flue gas inlet 211 of the waste heat boiler 21, and the flue gas introduced into the waste heat boiler 21 is used to heat water in the waste heat boiler 21 to heat the water into steam, and the steam is introduced into the steam turbine 22 through the steam exhaust port 213 to drive the second generator 25 to generate electricity, thereby realizing combined power generation of the gas turbine and the steam. The steam discharged from the steam turbine 22 is introduced into the condenser 23 through the steam inlet 231 of the condenser 23, so that the condenser 23 can cool down and liquefy the steam into condensed water, the condenser 23 then introduces the condensed water into the feed pump 24, and the condensed water in the feed pump 24 can be introduced into the waste heat boiler 21 through the first water inlet 214 through the feed pump 24 so as to exchange heat with the flue gas in the waste heat boiler 21, thereby realizing the power generation by utilizing the steam cycle.
The output shaft of the steam turbine 22 is connected with the rotating shaft of the second engine, so that when the output shaft of the steam turbine is driven to rotate, the rotating shaft of the second generator 25 is driven to rotate, and the power generation function is realized.
The photo-thermal heat exchange device 3 comprises a flue gas inlet 31, a water through port 33 and a water outlet 34, wherein the flue gas inlet 31 is connected with a flue gas outlet 212 of the waste heat boiler 21, so that flue gas in the waste heat boiler 21 is led into the photo-thermal heat exchange device 3, the water through port 33 is connected with a water outlet 242 of the water feeding pump 24, and the water outlet 34 is connected with a second water injection port 215 of the waste heat boiler 21.
Specifically, the water feed pump 24 may introduce a part of condensed water into the photo-thermal heat exchange device 3 through the water outlet 242 and the water inlet 33 of the photo-thermal heat exchange device 3. The flue gas inlet 31 is connected with the flue gas outlet 212 of the waste heat boiler 21 through a pipeline, so that flue gas in the waste heat boiler 21 can be introduced into the photo-thermal heat exchange device 3 through the flue gas outlet 212 and the flue gas inlet 31 to heat the flue gas through the photo-thermal heat exchange device 3. The heated flue gas can exchange heat with the condensed water which is introduced into the photo-thermal heat exchange device 3 so as to increase the temperature of the condensed water, and then the heated condensed water is introduced into the waste heat boiler 21 so as to prepare for heat exchange with the flue gas in the waste heat boiler 21. The photo-thermal heat exchange device 3 further comprises a smoke outlet 32, and the heated smoke and condensed water can be discharged through the smoke outlet 32 after heat exchange.
It will be appreciated that the flue gas after heat exchange in the waste heat boiler 21 is led into the photo-thermal heat exchange device 3, and meanwhile, part of condensed water is led into the photo-thermal heat exchange device 3 through the water feeding pump 24, so that the part of condensed water can be preheated by utilizing the waste heat of the flue gas. In addition, the photo-thermal heat exchange device 3 can heat the flue gas in the photo-thermal heat exchange device 3 by utilizing solar heat energy, so that the heated flue gas exchanges heat with the part of condensed water, the temperature of the condensed water is further improved, and finally the heated condensed water is introduced into the waste heat boiler 21, so that the efficiency of generating steam in the waste heat boiler 21 is increased, and the power generation efficiency of the steam turbine is further increased.
Therefore, the photo-thermal steam cycle and gas turbine steam cycle combined power generation system provided by the embodiment of the invention has the advantage of high flue gas utilization rate.
In some embodiments, the photo-thermal heat exchange device 3 comprises a solar heat collection assembly and an energy exchange assembly, the solar heat collection assembly comprises a first heating pipe, the energy exchange assembly comprises a first heat exchange pipe and a second heat exchange pipe, one end of the first heating pipe is connected with the flue gas inlet 31, the other end of the first heating pipe is connected with one end of the first heat exchange pipe, the other end of the first heat exchange pipe is connected with a flue gas outlet of the photo-thermal heat exchange device 3, the second heat exchange pipe is communicated with the water outlet 34, and the first heating pipe is arranged adjacent to the second heat exchange pipe so as to preheat the second heat exchange pipe.
Specifically, the solar heat collection component is used for absorbing solar heat energy, namely the first heating pipe can utilize the solar heat energy to enable the temperature of the first heating pipe to be increased so as to heat flue gas introduced into the first heating pipe, and then the heated flue gas is introduced into the first heat exchange pipe. The water feed pump 24 can feed part of condensed water into the second heat exchange tube through the water feed port 33 of the photo-thermal heat exchange device 3.
It will be appreciated that the flue gas exhausted from the waste heat boiler 21 is introduced into the first heating pipe through the flue gas inlet 31, so that the solar heat energy is used for heating the first heating pipe, the temperature of the flue gas in the first heating pipe is raised, the heated flue gas is introduced into the first heat exchange pipe and exchanges heat with the condensed water in the second heat exchange pipe, so as to raise the temperature of the condensed water, and then the heated condensed water is introduced into the waste heat boiler 21, so as to prepare for heat exchange with the flue gas in the waste heat boiler 21.
The flue gas just introduced into the first heating pipe still has a certain temperature, the first heating pipe is arranged adjacent to the second heat exchange pipe, and the flue gas can be used for exchanging heat with condensed water in the second heat exchange pipe to realize a preheating function, so that the residual temperature of the flue gas is better utilized.
In some embodiments, the first heating tube is a metal tube, and the outer wall of the first heating tube is coated with a selective absorbing coating. It will be appreciated that the selective absorption coating applied to the outer wall of the metal tube is more advantageous for heating the metal tube by solar light to increase the heat absorption efficiency.
Optionally, the solar heat collection assembly further comprises a first glass tube, at least part of which is sleeved outside the first heating tube. That is, the glass tube is sleeved on the metal tube to effectively inhibit heat loss, so that the self temperature of the metal tube is ensured, and the metal tube is prevented from radiating too fast. It will be appreciated that the first heating tube comprises a first section adjacent the flue gas inlet 31 and adjacent the second heat exchange tube, and a second section over which the first glass tube is sleeved to ensure that the condensate of the second heat exchange tube can be heat exchanged by the flue gas in the first section.
Preferably, a first annular cavity is formed between the first glass tube and the first heating tube, and the first annular cavity is a vacuum cavity. That is, the first annular cavity is in a vacuum state, so that convection and conduction heat loss in the first annular cavity can be restrained, the self temperature of the metal tube is further ensured, and the heat loss of the metal tube is reduced.
In some embodiments, as shown in fig. 1, the smoke inlet 211 is connected to the turbine 13 through a ventilation pipeline 10, the ventilation pipeline 10 is provided with a first inlet 101 and a second inlet 102, and the solar heat collecting assembly further comprises a second heating pipe, which is a metal pipe, and the second heating pipe is communicated with the first inlet 101 and the second inlet 102.
It will be appreciated that one end of the second heating pipe is connected to the first inlet 101 through a pipe, the other end of the second heating pipe is connected to the second inlet 102 through a pipe, the second heating pipe can absorb solar heat energy to raise its temperature, that is, the flue gas exhausted from the turbine 13 can be introduced into the second heating pipe through the first inlet 101, the second heating pipe can heat the flue gas and introduce into the ventilation pipeline 10 through the second inlet 102, that is, a part of the flue gas in the ventilation pipeline 10 can be heated by using the photo-thermal heat exchange device 3, and the heated flue gas is introduced into the waste heat boiler 21 to heat water in the waste heat boiler 21, so that the overall temperature of the flue gas introduced into the waste heat boiler 21 is raised, the efficiency of the waste heat boiler 21 to heat the water into steam is raised, and the power generation efficiency of the second generator 25 is raised.
Optionally, the solar heat collection assembly further comprises a second glass tube, and the second glass tube is sleeved outside the second heating tube. It can be understood that the second glass tube is sleeved on the metal tube, so that heat loss can be effectively restrained, the self temperature of the metal tube is ensured, and the metal tube is prevented from radiating too fast.
Preferably, a second annular cavity is formed between the second glass tube and the second heating tube, and the second annular cavity is a vacuum cavity. That is, the second annular cavity is in a vacuum state, so that convection and conduction heat loss in the second annular cavity can be restrained, the self temperature of the metal tube is further ensured, and the heat loss of the metal tube is reduced.
In addition, the photo-thermal heat exchange device 3 of the reheating type photo-thermal and steam combined cycle power generation system is used for collecting solar heat energy so as to heat the metal pipe. The collection of solar thermal energy may be performed in a variety of ways, for example: the solar heat exchange device 3 of the regenerative solar heat and steam combined cycle power generation system according to the embodiment of the invention can adopt different setting forms to collect solar heat energy according to actual environments.
In some embodiments, as shown in FIG. 1, the gas turbine assembly further includes a compressor 11 and a combustor 12, the compressor 11, the combustor 12, and the turbine 13 being connected in sequence, the compressor 11 for absorbing and compressing air, the combustor 12 for combusting the compressed air with fuel and generating high temperature and high pressure gas.
Specifically, as shown in fig. 1, the compressor 11 absorbs and compresses air, and then the compressed air is introduced into the combustion chamber 12, so as to provide air required by fuel combustion for the combustion chamber 12, the fuel in the combustion chamber 12 generates high-temperature and high-pressure gas after combustion, and the gas is introduced into the turbine 13 for expansion work, so that the first generator 14 is driven to generate power.
Preferably, the compressor 11 and the turbine 13 are coaxially arranged. It will be appreciated that the compressor 11 and the turbine 13 are disposed on the same main shaft, that is, during operation, the compressor 11 is driven by the external motor, the compressor 11 is started to provide compressed air for the combustion chamber 12, thereby providing high temperature gas for the turbine 13, and the turbine 13 expands to perform work to drive the main shaft to rotate, that is, when the turbine 13 starts to operate, the compressor 1111 is driven to rotate, so that long-time use of the external motor is avoided.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (8)
1. A photo-thermal steam cycle and gas turbine steam cycle cogeneration system comprising:
A gas turbine power plant comprising a gas turbine assembly and a first generator, the gas turbine assembly comprising a turbine coupled to the first generator for driving the first generator to generate power;
The steam cycle power generation device comprises a second generator, a waste heat boiler, a steam turbine, a condenser and a water supply pump, wherein the waste heat boiler comprises a smoke inlet, a smoke outlet, a steam outlet, a first water filling port and a second water filling port, the smoke inlet is connected with a smoke outlet of the turbine,
The steam turbine is connected with the second generator so as to drive the second generator to generate electricity,
The condenser is connected with the steam turbine so as to cool the steam discharged from the steam turbine into condensed water,
The water supply pump comprises a water inlet and a water outlet, the water inlet is connected with a condensate water outlet of the condenser, and the water outlet is connected with the first water injection port of the waste heat boiler so as to convey part of condensate water into the waste heat boiler; and
The photo-thermal heat exchange device comprises a flue gas inlet, a water inlet and a water outlet, wherein the flue gas inlet is connected with the smoke outlet of the waste heat boiler so that flue gas in the waste heat boiler can be introduced into the photo-thermal heat exchange device, the water inlet is connected with the water outlet of the water feeding pump, the water outlet is connected with the second water injection port of the waste heat boiler,
The photo-thermal heat exchange device comprises a solar heat collection assembly and an energy exchange assembly, the solar heat collection assembly comprises a first heat exchange tube and a second heat exchange tube, one end of the first heat exchange tube is connected with the flue gas inlet, the other end of the first heat exchange tube is connected with one end of the first heat exchange tube, the other end of the first heat exchange tube is connected with a flue gas outlet of the photo-thermal heat exchange device, the second heat exchange tube is communicated with the water inlet and the water outlet, the first heat exchange tube is arranged adjacent to the second heat exchange tube so as to preheat the second heat exchange tube,
The smoke inlet is connected with the turbine through a ventilation pipeline, the ventilation pipeline is provided with a first inlet and a second inlet, the solar heat collection assembly further comprises a second heating pipe, the second heating pipe is communicated with the first inlet and the second inlet, the second heating pipe is a metal pipe,
And the flue gas exhausted by the turbine is introduced into the second heating pipe through the first inlet, and the second heating pipe heats the flue gas and is introduced into the ventilation pipeline through the second inlet.
2. The combined photo-thermal steam cycle and gas turbine steam cycle power generation system according to claim 1, wherein the first heating pipe is a metal pipe, and the outer wall surface of the first heating pipe is coated with a selective absorption coating.
3. The combined photo-thermal steam cycle and gas turbine steam cycle power generation system of claim 1, wherein the solar heat collection assembly further comprises a first glass tube, at least a portion of the first glass tube being sleeved outside the first heating tube.
4. A combined power generation system of a photo-thermal steam cycle and a gas turbine steam cycle according to claim 3, wherein a first annular cavity is formed between the first glass tube and the first heating tube, and the first annular cavity is a vacuum cavity.
5. The combined photo-thermal steam cycle and gas turbine steam cycle power generation system as recited in claim 4, wherein said solar collector assembly further comprises a second glass tube, said second glass tube being sleeved outside said second heating tube;
a first annular gap is formed between the first glass tube and the first metal tube, a second annular gap is formed between the second glass tube and the second metal tube, and the first annular gap and the second annular gap are both in a vacuum state.
6. The combined photo-thermal steam cycle and gas turbine steam cycle power generation system as recited in claim 5, wherein a second annular cavity is formed between the second glass tube and the second heating tube, and the second annular cavity is a vacuum cavity.
7. The combined photo-thermal steam cycle and gas turbine steam cycle power generation system as defined in claim 6, wherein said gas turbine assembly further comprises a compressor and a combustor, said compressor, said combustor, and said turbine being connected in sequence, said compressor being configured to absorb and compress air, said combustor being configured to combust said compressed air with fuel and produce high temperature and high pressure gas.
8. The combined photo-thermal steam cycle and gas turbine steam cycle power generation system as recited in claim 7, wherein said compressor and said turbine are coaxially disposed.
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| CN102966495A (en) * | 2012-11-09 | 2013-03-13 | 青海中控太阳能发电有限公司 | Tower type solar energy-steam combustion gas combined cycle power generation system |
| CN106958514A (en) * | 2017-03-24 | 2017-07-18 | 国家电网公司 | A kind of solar heat power generation system combined with combustion gas, Steam Power Circulation electricity generation system |
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| JP5596715B2 (en) * | 2012-01-19 | 2014-09-24 | 株式会社日立製作所 | Solar thermal combined power generation system and solar thermal combined power generation method |
| CN204783144U (en) * | 2015-07-14 | 2015-11-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Gas - steam combined cycle generation waste heat utilization system |
| CN112922686B (en) * | 2021-01-21 | 2022-08-19 | 青岛科技大学 | Gas-steam combined cycle composite power generation system integrating solar energy and MCFC |
| CN113756953B (en) * | 2021-08-24 | 2024-08-23 | 中国联合重型燃气轮机技术有限公司 | Gas turbine power generation system and power generation method |
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| CN102966495A (en) * | 2012-11-09 | 2013-03-13 | 青海中控太阳能发电有限公司 | Tower type solar energy-steam combustion gas combined cycle power generation system |
| CN106958514A (en) * | 2017-03-24 | 2017-07-18 | 国家电网公司 | A kind of solar heat power generation system combined with combustion gas, Steam Power Circulation electricity generation system |
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