CN113153524B - Gas turbine inlet air cooling and carbon capture system utilizing liquefied natural gas cold energy - Google Patents
Gas turbine inlet air cooling and carbon capture system utilizing liquefied natural gas cold energy Download PDFInfo
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- CN113153524B CN113153524B CN202110487678.7A CN202110487678A CN113153524B CN 113153524 B CN113153524 B CN 113153524B CN 202110487678 A CN202110487678 A CN 202110487678A CN 113153524 B CN113153524 B CN 113153524B
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- 239000007789 gas Substances 0.000 title claims abstract description 145
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 95
- 238000001816 cooling Methods 0.000 title claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000003546 flue gas Substances 0.000 claims abstract description 81
- 239000003507 refrigerant Substances 0.000 claims abstract description 60
- 238000001704 evaporation Methods 0.000 claims abstract description 36
- 230000008020 evaporation Effects 0.000 claims abstract description 36
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 78
- 239000007788 liquid Substances 0.000 claims description 45
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 39
- 239000001569 carbon dioxide Substances 0.000 claims description 39
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 5
- 230000009919 sequestration Effects 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 238000007701 flash-distillation Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
- F02C3/22—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being gaseous at standard temperature and pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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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
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
- F02C7/143—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid before or between the compressor stages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a gas turbine inlet air cooling and carbon capturing system utilizing liquefied natural gas cold energy, which relates to the field of liquefied natural gas and comprises: a liquefied natural gas storage device; the gas turbine system comprises an air heat exchanger, a flash evaporation gas heat exchanger and a gas turbine, wherein a refrigerant side inlet and a heat medium side inlet of the air heat exchanger are respectively communicated with the liquefied natural gas storage device and air, a refrigerant side inlet and a heat medium side inlet of the flash evaporation gas heat exchanger are respectively communicated with the liquefied natural gas storage device and liquefied natural gas flash evaporation gas, and a heat medium side outlet of the air heat exchanger and a heat medium side outlet of the flash evaporation gas heat exchanger are both communicated with an air inlet of the gas turbine; the flue gas treatment system comprises a first flue gas heat exchanger, the liquefied natural gas storage device is communicated with a refrigerant side inlet of the first flue gas heat exchanger, and a heat medium side inlet of the first flue gas heat exchanger is communicated with a flue gas outlet of the gas turbine. The system can not only improve the comprehensive efficiency of the gas turbine, but also reduce the carbon emission.
Description
Technical Field
The invention relates to the field of liquefied natural gas, in particular to a gas turbine inlet air cooling and carbon capturing system utilizing the cold energy of liquefied natural gas.
Background
In recent years, with rapid industrial development, the demand of fossil fuels is rapidly increased, natural gas is used as the cleanest energy source of the fossil fuels, the trade of natural gas is rapidly developed, and the natural gas is widely used worldwide. There are many ways of transporting natural gas, the most common being liquefied natural gas for some transoceanic, long-distance transportation, etc.
In the lng storage and transportation process, although the lng storage facility is provided with an insulation layer, heat is introduced, and BOG (flash boil off gas) is inevitably generated. Currently, the management method of BOG is mainly used as a power generation fuel. However, after the BOG is used as a power generation fuel of the gas turbine to generate power, the gas turbine can discharge a large amount of flue gas, and a large amount of carbon dioxide in the flue gas is discharged in an unorganized manner, so that the environment is seriously polluted.
On the other hand, the storage temperature of liquefied natural gas is-162 ℃, while the temperature of natural gas used by users is mostly ambient temperature, and about 850kJ/kg of cold energy is released in the process of gasifying the liquefied natural gas from-162 ℃ to the ambient temperature, and the part of cold energy is not fully utilized at present.
Therefore, how to utilize the cold energy released in the gasification process of liquefied natural gas to improve the overall efficiency of the gas turbine and reduce the emission of carbon dioxide after the BOG is used as the fuel for power generation of the gas turbine becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a gas turbine inlet air cooling and carbon capturing system using liquefied natural gas cold energy, which can cool inlet air of a gas turbine and capture carbon dioxide by using the liquefied natural gas cold energy, not only can improve the comprehensive efficiency of the gas turbine, but also can effectively reduce the carbon emission of the system and reduce the pollution to the environment.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a gas turbine inlet air cooling and carbon capturing system using liquefied natural gas cold energy, comprising: a liquefied natural gas storage device in which liquefied natural gas is stored; the gas turbine system comprises an air heat exchanger, a flash evaporation gas heat exchanger and a gas turbine, wherein a refrigerant side inlet and a heat medium side inlet of the air heat exchanger are respectively communicated with the liquefied natural gas storage device and air, a refrigerant side inlet and a heat medium side inlet of the flash evaporation gas heat exchanger are respectively communicated with the liquefied natural gas storage device and the liquefied natural gas flash evaporation gas, and a heat medium side outlet of the air heat exchanger and a heat medium side outlet of the flash evaporation gas heat exchanger are both communicated with an air inlet of the gas turbine; the liquefied natural gas storage device is communicated with a refrigerant side inlet of the first flue gas heat exchanger, and a heat medium side inlet of the first flue gas heat exchanger is communicated with a smoke outlet of the gas turbine; and the liquid carbon dioxide collecting system is communicated with a heating medium side outlet of the first flue gas heat exchanger.
Preferably, the liquid carbon dioxide collecting system comprises a first gas-liquid separator and a liquid carbon dioxide storage device, and the heat medium side outlet of the first flue gas heat exchanger, the first gas-liquid separator and the liquid carbon dioxide storage device are communicated in sequence.
Preferably, the liquid carbon dioxide storage device is a liquid carbon dioxide storage tank, and the liquefied natural gas storage device is a liquid natural gas storage tank.
Preferably, the flue gas treatment system further comprises a second flue gas heat exchanger, a second gas-liquid separator and a gas compression device, the liquefied natural gas storage device and the gas outlet of the gas turbine are respectively communicated with the refrigerant side inlet and the heat medium side inlet of the second flue gas heat exchanger, the heat medium side outlet of the second flue gas heat exchanger is communicated with the inlet of the second gas-liquid separator, the gas outlet of the second gas-liquid separator is communicated with the gas inlet of the gas compression device, and the gas outlet of the gas compression device is communicated with the heat medium side inlet of the first flue gas heat exchanger.
Preferably, the liquefied natural gas storage device is communicated with a refrigerant side inlet of the air heat exchanger and a refrigerant side inlet of the first flue gas heat exchanger, and the refrigerant side of the air heat exchanger, the refrigerant side of the flash evaporation gas heat exchanger, the refrigerant side of the second flue gas heat exchanger and the refrigerant side of the first flue gas heat exchanger are sequentially communicated.
Preferably, the liquefied natural gas storage device is communicated with a refrigerant side inlet of the air heat exchanger through a first branch, the liquefied natural gas storage device is communicated with a refrigerant side inlet of the first flue gas heat exchanger through a second branch, a refrigerant side outlet of the air heat exchanger is communicated with a refrigerant side inlet of the flash evaporation gas heat exchanger through a third branch, a refrigerant side outlet of the flash evaporation gas heat exchanger is communicated with a refrigerant side inlet of the second flue gas heat exchanger through a fourth branch, and a refrigerant side outlet of the second flue gas heat exchanger is communicated with a refrigerant side inlet of the first flue gas heat exchanger through a fifth branch.
Preferably, the gas compression device is a compressor.
Preferably, the gas turbine comprises a gas compressor, a combustion chamber and a gas turbine which are sequentially communicated, a heat medium side outlet of the air heat exchanger is communicated with the gas compressor, a heat medium side outlet of the flash evaporation gas heat exchanger is communicated with the combustion chamber, and the gas turbine is communicated with a heat medium side inlet of the second flue gas heat exchanger.
Compared with the prior art, the invention has the following technical effects:
the invention provides a gas turbine inlet air cooling and carbon capturing system utilizing liquefied natural gas cold energy, which comprises: the liquefied natural gas storage device is internally stored with liquefied natural gas; the gas turbine system comprises an air heat exchanger, a flash evaporation gas heat exchanger and a gas turbine, wherein a refrigerant side inlet and a heating medium side inlet of the air heat exchanger are respectively communicated with the liquefied natural gas storage device and air, a refrigerant side inlet and a heating medium side inlet of the flash evaporation gas heat exchanger are respectively communicated with the liquefied natural gas storage device and the liquefied natural gas flash evaporation gas, and a heating medium side outlet of the air heat exchanger and a heating medium side outlet of the flash evaporation gas heat exchanger are both communicated with an air inlet of the gas turbine; the liquefied natural gas storage device is communicated with a refrigerant side inlet of the first flue gas heat exchanger, and a heat medium side inlet of the first flue gas heat exchanger is communicated with a smoke outlet of the gas turbine; and the liquid carbon dioxide collecting system is communicated with a heat medium side outlet of the first flue gas heat exchanger.
In the specific use process, liquefied natural gas exchanges heat with air and liquefied natural gas flash evaporation gas, thereby reducing the temperature of the air and the liquefied natural gas flash evaporation gas, reducing the temperature of inlet air (air and liquefied natural gas flash evaporation gas) of a gas turbine, improving the comprehensive efficiency of power generation of the gas turbine, and simultaneously cooling flue gas exhausted by the gas turbine by the liquefied natural gas, so that the carbon dioxide is condensed into liquid carbon dioxide and is separated from the flue gas, thereby effectively avoiding the emission of a large amount of carbon dioxide to the atmosphere and causing serious environmental pollution. The system utilizes the cold energy of the liquefied natural gas, improves the comprehensive efficiency of the gas turbine and reduces the carbon emission of the system on the basis of avoiding the waste of the cold energy of the liquefied natural gas.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating an overall structure of a gas turbine inlet air cooling and carbon capture system using lng cooling energy according to an embodiment of the present invention.
FIG. 2 is a schematic flow diagram of a gas turbine inlet air cooling and carbon capture system using LNG cooling energy according to an embodiment of the present invention.
Description of reference numerals: 100. a gas turbine inlet air cooling and carbon capture system utilizing liquefied natural gas cooling energy; 1. a liquefied natural gas storage device; 2. a gas turbine system; 3. a flue gas treatment system; 4. a liquid carbon dioxide collection system; 11. a first branch; 12. a second branch circuit; 21. an air heat exchanger; 22. a flash evaporation gas heat exchanger; 23. a compressor; 24. a gas turbine; 25. a combustion chamber; 26. a third branch; 27. a fourth branch; 31. a flue gas pipeline; 32. a second flue gas heat exchanger; 33. a second gas-liquid separator; 34. a gas compression device; 35. a first flue gas heat exchanger; 36. a fifth branch; 41. a first gas-liquid separator; 42. a liquid carbon dioxide storage tank; 5. an air reservoir; 6. and (4) a flash evaporation gas storage tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a gas turbine inlet air cooling and flue gas carbon dioxide capture integrated system which utilizes liquefied natural gas cold energy to cool inlet air of a gas turbine and capture carbon dioxide, can improve the comprehensive efficiency of the gas turbine, can effectively reduce the carbon emission of the system and reduce the pollution to the environment.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
Referring to fig. 1-2, the present embodiment provides a gas turbine inlet air cooling and carbon capture system 100 using lng cooling energy, including: the liquefied natural gas storage device 1 is characterized in that liquefied natural gas is stored in the liquefied natural gas storage device 1; the gas turbine system 2 comprises an air heat exchanger 21, a flash evaporation gas heat exchanger 22 and a gas turbine, wherein a refrigerant side inlet and a heat medium side inlet of the air heat exchanger 21 are respectively communicated with the liquefied natural gas storage device 1 and air so as to exchange heat with the liquefied natural gas and the air, a refrigerant side inlet and a heat medium side inlet of the flash evaporation gas heat exchanger 22 are respectively communicated with the liquefied natural gas storage device 1 and the liquefied natural gas flash evaporation gas so as to exchange heat with the liquefied natural gas and the liquefied natural gas flash evaporation gas, and a heat medium side outlet of the air heat exchanger 21 and a heat medium side outlet of the flash evaporation gas heat exchanger 22 are both communicated with an air inlet of the gas turbine; the flue gas treatment system 3 comprises a first flue gas heat exchanger 35, the liquefied natural gas storage device 1 is communicated with a refrigerant side inlet of the first flue gas heat exchanger 35 so as to exchange heat for flue gas exhausted by the gas turbine by using liquefied natural gas, and a heat medium side inlet of the first flue gas heat exchanger 35 is communicated with a smoke outlet of the gas turbine; and the liquid carbon dioxide collecting system 4 is communicated with a heat medium side outlet of the first flue gas heat exchanger 35 to collect the condensed liquid carbon dioxide.
In the specific use, liquefied natural gas carries out the heat transfer with air and liquefied natural gas flash distillation gas, thereby reduce the temperature of air and liquefied natural gas flash distillation gas, make gas turbine inlet gas (air and liquefied natural gas flash distillation gas) temperature reduce, the comprehensive efficiency of gas turbine electricity generation improves, liquefied natural gas cools down gas turbine exhaust flue gas simultaneously, make the carbon dioxide gas condensation become liquid carbon dioxide, isolate in the flue gas, effectively avoided a large amount of carbon dioxide gas to discharge to the atmosphere, the condition of serious polluted environment takes place. The system utilizes the cold energy of the liquefied natural gas, improves the comprehensive efficiency of the gas turbine and reduces the carbon emission of the system on the basis of avoiding the waste of the cold energy of the liquefied natural gas.
Specifically, in this embodiment, air is stored in the air storage tank 5, flash vapor of liquefied natural gas is stored in the flash vapor storage tank 6, the heat medium side inlet of the air heat exchanger 21 is communicated with the air storage tank 5, and the heat medium side inlet of the flash vapor heat exchanger 22 is communicated with the flash vapor storage tank 6.
In this embodiment, the flue gas after heat exchange may contain other gaseous impurities besides the liquid carbon dioxide, and in order to separate these gaseous impurities, the liquid carbon dioxide collecting system 4 includes a liquid carbon dioxide storage device and a first gas-liquid separator 41 for separating the above gaseous impurities, and the outlet on the heat medium side of the first flue gas heat exchanger 35, the first gas-liquid separator 41 and the liquid carbon dioxide storage device are sequentially communicated.
In the present embodiment, specifically, the liquid carbon dioxide storage device is a liquid carbon dioxide storage tank 42, and the liquefied natural gas storage device 1 is a liquid natural gas storage tank.
Referring to fig. 2, in the present embodiment, the flue gas treatment system 3 further includes a second flue gas heat exchanger 32, a second gas-liquid separator 33, and a gas compression device 34, the liquefied natural gas storage device 1 and the gas outlet of the gas turbine are respectively communicated with the refrigerant side inlet and the heat medium side inlet of the second flue gas heat exchanger 32, the heat medium side outlet of the second flue gas heat exchanger 32 is communicated with the inlet of the second gas-liquid separator 33, the gas outlet of the second gas-liquid separator 33 is communicated with the gas inlet of the gas compression device 34, and the gas outlet of the gas compression device 34 is communicated with the heat medium side inlet of the first flue gas heat exchanger 35. The second flue gas heat exchanger 32 precools the flue gas discharged by the gas turbine, the second gas-liquid separator 33 is used for carrying out primary gas-liquid separation on the precooled flue gas to separate out carbon dioxide gas, then the gas compression device 34 compresses the separated carbon dioxide gas, and the compressed carbon dioxide gas is subjected to cryogenic cooling by the first flue gas heat exchanger 35 again to obtain liquid carbon dioxide.
In this embodiment, the flue gas outlet of the gas turbine is connected to the heating medium side inlet of the second flue gas heat exchanger 32 through a flue gas pipeline 31.
Referring to fig. 2, in the present embodiment, the lng storage apparatus 1 is communicated with both the refrigerant side inlet of the air heat exchanger 21 and the refrigerant side inlet of the first flue gas heat exchanger 35, and the refrigerant side of the air heat exchanger 21, the refrigerant side of the flash vapor heat exchanger 22, the refrigerant side of the second flue gas heat exchanger 32, and the refrigerant side of the first flue gas heat exchanger 35 are sequentially communicated. Specifically, the lng storage device 11 is communicated with a refrigerant side inlet of the air heat exchanger 21 through a first branch 11, the lng storage device 11 is communicated with a refrigerant side inlet of the first flue gas heat exchanger 35 through a second branch 12, a refrigerant side outlet of the air heat exchanger 21 is communicated with a refrigerant side inlet of the flash evaporation gas heat exchanger 22 through a third branch 26, a refrigerant side outlet of the flash evaporation gas heat exchanger 22 is communicated with a refrigerant side inlet of the second flue gas heat exchanger 32 through a fourth branch 27, and a refrigerant side outlet of the second flue gas heat exchanger 32 is communicated with a refrigerant side inlet of the first flue gas heat exchanger 35 through a fifth branch 36. The air cooling needs a temperature environment of minus 30 ℃, the flash evaporation gas only needs the temperature of 30 ℃, the heat exchangers are arranged in series, the cold energy of the liquefied natural gas is utilized in a segmented mode, the air is cooled by utilizing the high-grade cold energy, the flash evaporation gas is cooled by utilizing the low-grade cold energy, and the residual lower-grade cold energy provides partial cold energy for a follow-up carbon dioxide collecting system.
In the present embodiment, the gas compressing device 34 is a compressor.
Referring to fig. 2, in the embodiment, specifically, the gas turbine includes a compressor 23, a combustion chamber 25 and a gas turbine 24 which are communicated in sequence, an outlet on the heat medium side of the air heat exchanger 21 is communicated with the compressor 23, an outlet on the heat medium side of the flash-vapor heat exchanger 22 is communicated with the combustion chamber 25, and the gas turbine 24 is communicated with an inlet on the heat medium side of the second flue gas heat exchanger 32.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. A gas turbine inlet air cooling and carbon capture system utilizing lng cold energy, comprising: a liquefied natural gas storage device in which liquefied natural gas is stored;
the gas turbine system comprises an air heat exchanger, a flash evaporation gas heat exchanger and a gas turbine, wherein a refrigerant side inlet and a heat medium side inlet of the air heat exchanger are respectively communicated with the liquefied natural gas storage device and air, the refrigerant side inlet and the heat medium side inlet of the flash evaporation gas heat exchanger are respectively communicated with the liquefied natural gas storage device and liquefied natural gas flash evaporation gas, and a heat medium side outlet of the air heat exchanger and a heat medium side outlet of the flash evaporation gas heat exchanger are both communicated with an air inlet of the gas turbine;
the liquefied natural gas storage device is communicated with a refrigerant side inlet of the first flue gas heat exchanger, and a heat medium side inlet of the first flue gas heat exchanger is communicated with a smoke outlet of the gas turbine;
the liquid carbon dioxide collecting system is communicated with a heating medium side outlet of the first flue gas heat exchanger;
the flue gas treatment system further comprises a second flue gas heat exchanger, a second gas-liquid separator and a gas compression device, wherein the liquefied natural gas storage device and the smoke outlet of the gas turbine are respectively communicated with a refrigerant side inlet and a heat medium side inlet of the second flue gas heat exchanger, a heat medium side outlet of the second flue gas heat exchanger is communicated with an inlet of the second gas-liquid separator, a gas outlet of the second gas-liquid separator is communicated with a gas inlet of the gas compression device, and a gas outlet of the gas compression device is communicated with a heat medium side inlet of the first flue gas heat exchanger;
the liquefied natural gas storage device is communicated with a refrigerant side inlet of the air heat exchanger through a first branch, the liquefied natural gas storage device is communicated with a refrigerant side inlet of the first flue gas heat exchanger through a second branch, a refrigerant side outlet of the air heat exchanger is communicated with a refrigerant side inlet of the flash evaporation gas heat exchanger through a third branch, a refrigerant side outlet of the flash evaporation gas heat exchanger is communicated with a refrigerant side inlet of the second flue gas heat exchanger through a fourth branch, and a refrigerant side outlet of the second flue gas heat exchanger is communicated with a refrigerant side inlet of the first flue gas heat exchanger through a fifth branch.
2. The gas turbine inlet air cooling and carbon capturing system using lng cooling energy according to claim 1, wherein the liquid carbon dioxide collecting system includes a first gas-liquid separator and a liquid carbon dioxide storage device, and the heat medium side outlet of the first flue gas heat exchanger, the first gas-liquid separator and the liquid carbon dioxide storage device are sequentially communicated.
3. The gas turbine inlet air cooling and carbon capture system using lng cooling energy of claim 2, wherein the liquid carbon dioxide storage device is a liquid carbon dioxide storage tank and the lng storage device is a lng storage tank.
4. The gas turbine inlet air cooling and carbon sequestration system using lng cooling energy as recited in claim 1, wherein the lng storage device is in communication with both the refrigerant side inlet of the air heat exchanger and the refrigerant side inlet of the first flue gas heat exchanger, and the refrigerant side of the air heat exchanger, the refrigerant side of the flash vapor heat exchanger, the refrigerant side of the second flue gas heat exchanger and the refrigerant side of the first flue gas heat exchanger are in communication in sequence.
5. The system of claim 1, wherein the gas compression device is a compressor.
6. The system for cooling and capturing carbon in an lng gas turbine according to claim 1, wherein the gas turbine includes a compressor, a combustor, and a gas turbine, which are sequentially connected to each other, the heat medium side outlet of the air heat exchanger is connected to the compressor, the heat medium side outlet of the flash gas heat exchanger is connected to the combustor, and the gas turbine is connected to the heat medium side inlet of the second flue gas heat exchanger.
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| CN202110487678.7A CN113153524B (en) | 2021-05-06 | 2021-05-06 | Gas turbine inlet air cooling and carbon capture system utilizing liquefied natural gas cold energy |
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| CN202110487678.7A CN113153524B (en) | 2021-05-06 | 2021-05-06 | Gas turbine inlet air cooling and carbon capture system utilizing liquefied natural gas cold energy |
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| CN113153524B true CN113153524B (en) | 2022-07-22 |
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| CN109876590A (en) * | 2019-03-20 | 2019-06-14 | 赫普科技发展（北京）有限公司 | A kind of thermal power plant utilizes LNG cold energy carbon capture system and carbon capture method |
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