CN115324736B - Combined power generation system of intercooler and fuel cell gas turbine and working method - Google Patents
Combined power generation system of intercooler and fuel cell gas turbine and working method Download PDFInfo
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- CN115324736B CN115324736B CN202210979518.9A CN202210979518A CN115324736B CN 115324736 B CN115324736 B CN 115324736B CN 202210979518 A CN202210979518 A CN 202210979518A CN 115324736 B CN115324736 B CN 115324736B
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- 239000000446 fuel Substances 0.000 title claims abstract description 91
- 238000010248 power generation Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 203
- 239000001257 hydrogen Substances 0.000 claims abstract description 75
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 75
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 74
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 58
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000002485 combustion reaction Methods 0.000 claims abstract description 48
- 239000003345 natural gas Substances 0.000 claims abstract description 29
- 239000000112 cooling gas Substances 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 61
- 239000001301 oxygen Substances 0.000 claims description 61
- 229910052760 oxygen Inorganic materials 0.000 claims description 61
- 230000005611 electricity Effects 0.000 claims description 17
- 229910021529 ammonia Inorganic materials 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000002407 reforming Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000003487 electrochemical reaction Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000006057 reforming reaction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005915 ammonolysis reaction Methods 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000000354 decomposition reaction Methods 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
- F02C7/143—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid before or between the compressor stages
-
- 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
- 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
- F02C7/22—Fuel supply systems
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to the technical field of a contact power generation device, in particular to a combined power generation system of an intercooler and a fuel cell gas turbine and a working method thereof, wherein the combined power generation system of the intercooler and the fuel cell gas turbine comprises: the air inlet of the low-pressure compressor is communicated with the outside air; the heat end of the intercooler is communicated with the air outlet of the low-pressure air compressor, the cold end of the intercooler is communicated with the liquid ammonia, the heat of the low-pressure air compressor heats and decomposes the liquid ammonia into hydrogen-rich gas, the hydrogen-rich gas outlet of the intercooler is communicated with the anode inlet of the fuel cell, and the cooling gas outlet of the intercooler is communicated with the cooling gas inlet of the high-pressure air compressor; the gas inlet of the combustion chamber is communicated with the high-pressure gas outlet of the high-pressure gas compressor, and the gas inlet of the combustion chamber is communicated with natural gas. The combustion efficiency of the gas turbine and the total efficiency of the power generation system are improved; the combined power generation of the fuel cell and the gas turbine ensures that the working efficiency and the output power of the combined power generation system of the intercooler and the fuel cell gas turbine are improved.
Description
Technical Field
The invention relates to the technical field of contact power generation devices, in particular to a combined power generation system of an intercooler and a fuel cell gas turbine and a working method thereof.
Background
Ammonia is a clean high-energy density hydrogen carrier, does not need to introduce oxygen and water for decomposition, has simple process, compact device structure, small occupied area, high hydrogen production purity and easy miniaturization, and meets the requirement of a movable hydrogen source. Compared with other reforming fuels, ammonia has the advantages of high hydrogen content, no pollution gas generation, no carbon element and the like. Compared with hydrogen, ammonia has large volume energy density, is easy to liquefy, store and transport, is safer than other common fuels, has better economical efficiency and has little environmental hazard; in addition, ammonia is supplied in the market sufficiently, the annual output reaches 2 hundred million tons, and the ammonia is the single chemical product with the largest consumption in the world today, has wide manufacturing and distributing infrastructures worldwide, is sufficient for guaranteeing uninterrupted supply of fuel, and has little environmental hazard.
The power generation industry is a major source of global greenhouse gas emissions and is thus identified as the major target industry for carbon dioxide abatement, and gas turbine distributed power generation is an important component of the power generation industry. At present, the research focus of the gas turbine is on improving the cycle thermal efficiency and reducing the carbon emission, the gas turbine mostly uses natural gas as a main fuel, and the gas such as ammonia/hydrogen is doped to reduce the carbon dioxide emission of the gas turbine, so that the gas turbine is a main solution.
Disclosure of Invention
Therefore, the invention provides a combined power generation system of an intercooler and a fuel cell gas turbine and a working method thereof, wherein the combined power generation system reduces carbon emission of the gas turbine and improves the overall power generation efficiency of the system.
In order to solve the technical problems, the invention provides a combined power generation system of an intercooler and a fuel cell gas turbine, comprising: the air inlet of the low-pressure air compressor is communicated with the outside air; the hot end of the intercooler is communicated with the air outlet of the low-pressure air compressor, the cold end of the intercooler is communicated with liquid ammonia, the heat of the low-pressure air compressor heats and decomposes the liquid ammonia to prepare hydrogen-rich gas, the hydrogen-rich gas outlet of the intercooler is communicated with the anode inlet of the fuel cell, and the cooling gas outlet of the intercooler is communicated with the cooling gas inlet of the high-pressure air compressor; the gas inlet of the combustion chamber is communicated with the high-pressure gas outlet of the high-pressure gas compressor, the gas inlet of the combustion chamber is communicated with natural gas, the gas inlet of the combustion chamber is communicated with the anode outlet of the fuel cell, the gas outlet of the combustion chamber is communicated with the gas inlet of the high-pressure turbine, and the gas outlet of the high-pressure turbine is connected with the generator; the cathode inlet of the fuel cell is communicated with the air outlet of the high-pressure turbine, the cathode outlet of the fuel cell is communicated with the low-pressure turbine, and the low-pressure turbine is connected with the generator.
Further, the hydrogen-rich gas is a mixed gas of ammonia vapor, nitrogen and hydrogen.
Further, the gas produced from the anode outlet is unburned hydrogen-rich gas.
Further, the oxygen content entering the combustion chamber from the high-pressure gas outlet of the high-pressure gas compressor is greater than the oxygen content required by mixing unburnt hydrogen-rich gas with natural gas.
Further, after the hydrogen-rich gas is combusted with the natural gas, the generated gas is high-temperature high-pressure oxygen-rich gas.
Further, the oxygen-enriched gas pushes the high-pressure turbine to do work for power generation, the oxygen-enriched gas is communicated with the cathode inlet, unburned oxygen is provided for the fuel cell for power generation, and the oxygen-enriched gas is communicated with the cathode outlet and pushes the low-pressure turbine to do work for power generation.
Further, the low-pressure compressor, the high-pressure turbine, the low-pressure turbine and the generator are coaxially arranged.
Further, a reforming chamber for ammonia decomposition reforming reaction is arranged in the intercooler.
Further, the fuel cell is a solid oxide fuel cell.
The invention also provides a working method of the combined power generation system of the intercooler and the fuel cell gas turbine, which comprises the following steps: the method comprises the steps that excessive air from the atmosphere is initially compressed by a low-pressure compressor and then is introduced into the hot end of an intercooler, liquid ammonia is introduced into the cold end of the intercooler, the initially compressed air is cooled by heat exchange, the cooled air is further compressed by a high-pressure compressor, and finally, the cooled air is introduced into a combustion chamber; heating and decomposing liquid ammonia into hydrogen-rich gas in an intercooler, wherein the oxygen content in the air in a combustion chamber is more than the oxygen content required by a mixture of the hydrogen-rich gas and natural gas, the hydrogen-rich gas and the natural gas are combusted in excessive air to generate high-temperature and high-pressure oxygen-rich gas, the oxygen-rich gas pushes a high-pressure turbine to do work for generating electricity, the oxygen-rich gas after doing work for generating electricity enters a cathode of a fuel cell, and the oxygen-rich gas at an outlet of the cathode of the fuel cell pushes a low-pressure turbine to do work for generating electricity; the hydrogen-rich gas is introduced into the anode of the fuel cell, and is subjected to electrochemical reaction with the oxygen-rich gas of the cathode to generate electricity, and unburnt hydrogen-rich gas at the anode outlet of the fuel cell is doped with natural gas.
The technical scheme of the invention has the following advantages:
1. The invention provides a combined power generation system of an intercooler and a fuel cell gas turbine, which comprises the following components: the air inlet of the low-pressure air compressor is communicated with the outside air; the hot end of the intercooler is communicated with the air outlet of the low-pressure air compressor, the cold end of the intercooler is communicated with liquid ammonia, the heat of the low-pressure air compressor heats and decomposes the liquid ammonia to prepare hydrogen-rich gas, the hydrogen-rich gas outlet of the intercooler is communicated with the anode inlet of the fuel cell, and the cooling gas outlet of the intercooler is communicated with the cooling gas inlet of the high-pressure air compressor; the gas inlet of the combustion chamber is communicated with the high-pressure gas outlet of the high-pressure gas compressor, the gas inlet of the combustion chamber is communicated with natural gas, the gas inlet of the combustion chamber is communicated with the anode outlet of the fuel cell, the gas outlet of the combustion chamber is communicated with the gas inlet of the high-pressure turbine, and the gas outlet of the high-pressure turbine is connected with the generator; the cathode inlet of the fuel cell is communicated with the air outlet of the high-pressure turbine, the cathode outlet of the fuel cell is communicated with the low-pressure turbine, and the low-pressure turbine is connected with the generator.
The combined power generation system of the intercooler and the fuel cell gas turbine utilizes the heat of the intercooler to heat and decompose the liquid ammonia, so that hydrogen-rich gas is prepared, the extra heat required by evaporation and decomposition of the liquid ammonia is saved, and the generated hydrogen-rich gas can be simultaneously used as fuel of the fuel cell and the gas turbine, namely, the intercooler is communicated with an anode inlet of the fuel cell; meanwhile, hydrogen-rich gas also enters the combustion chamber and is mixed with natural gas in the combustion chamber for combustion, so that the CO2 emission of the gas turbine is reduced; when the liquid ammonia is heated and decomposed into hydrogen-rich gas in the intercooler, the oxygen content in the air in the combustion chamber is more than the oxygen content required by the mixture of the hydrogen-rich gas and the natural gas, the hydrogen-rich gas and the natural gas are combusted in excessive air to generate high-temperature and high-pressure oxygen-rich gas, the oxygen-rich gas pushes the high-pressure turbine to do work and generate power, the oxygen-rich gas after doing work and generating power enters the cathode of the fuel cell, and the oxygen-rich gas at the outlet of the cathode of the fuel cell pushes the low-pressure turbine to do work and generate power, so that the combustion efficiency of the gas turbine and the total efficiency of a power generation system are improved; the combined power generation of the fuel cell and the gas turbine ensures that the working efficiency and the output power of the combined power generation system of the intercooler and the fuel cell gas turbine are improved.
2. The gas produced by the anode outlet is unburnt hydrogen-rich gas. The hydrogen-rich gas coming out of the hydrogen-rich gas outlet of the intercooler enters the anode of the fuel cell, and the hydrogen-rich gas reacts with the oxygen-rich gas to burn, so that the fuel cell generates electricity. The unburned hydrogen-rich gas enters the combustion chamber through the anode outlet to perform further reaction combustion, and the waste of the unburned hydrogen-rich gas is avoided through the arrangement.
3. The combined power generation system of the intercooler and the fuel cell gas turbine is characterized in that a low-pressure compressor, a high-pressure turbine, a low-pressure turbine and a generator are coaxially arranged. The low-pressure compressor, the high-pressure turbine, the low-pressure turbine and the generator are coaxially arranged, so that the working performances of the low-pressure compressor, the high-pressure turbine, the low-pressure turbine and the generator are ensured, and the optimal working efficiency is achieved.
The summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a combined power generation system of an intercooler and a fuel cell gas turbine provided by the present invention.
Reference numerals illustrate:
1. a low pressure compressor; 2. an intercooler; 3. a high pressure compressor; 4. a combustion chamber; 5. a high pressure turbine; 6. a fuel cell; 7. a low pressure turbine; 8. and (5) a generator.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. 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 one or more of the described features. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, or communicable with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
In this disclosure, unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different structures of the disclosure. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present disclosure. Furthermore, the present disclosure may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings, it being understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present disclosure.
Referring to fig. 1, the present invention provides a combined power generation system of an intercooler and a fuel cell gas turbine, comprising: the low-pressure compressor 1, the air inlet of the low-pressure compressor 1 is communicated with the outside air; the hot end of the intercooler 2 is communicated with the air outlet of the low-pressure air compressor 1, the cold end of the intercooler 2 is communicated with liquid ammonia, the heat of the low-pressure air compressor 1 heats and decomposes the liquid ammonia to prepare hydrogen-rich gas, the hydrogen-rich gas outlet of the intercooler 2 is communicated with the anode inlet of the fuel cell 6, and the cooling gas outlet of the intercooler 2 is communicated with the cooling gas inlet of the high-pressure air compressor 3; a combustion chamber 4, wherein a gas inlet is communicated with a high-pressure gas outlet of the high-pressure compressor 3, a gas inlet of the combustion chamber 4 is communicated with natural gas, a gas inlet of the combustion chamber 4 is communicated with an anode outlet of the fuel cell 6, a gas outlet of the combustion chamber 4 is communicated with a gas inlet of a high-pressure turbine 5, and a gas outlet of the high-pressure turbine 5 is connected with a generator 8; the cathode inlet of the fuel cell 6 communicates with the air outlet of the high pressure turbine 5, the cathode outlet of the fuel cell 6 communicates with a low pressure turbine 7, and the low pressure turbine 7 is connected with the generator 8.
The combined power generation system of the intercooler and the fuel cell gas turbine utilizes the heat of the intercooler 2 to heat and decompose the liquid ammonia, so as to prepare hydrogen-rich gas, and the extra heat required by evaporation and decomposition of the liquid ammonia is saved, and the generated hydrogen-rich gas can be simultaneously used as fuel of the fuel cell 6 and the gas turbine, namely the intercooler 2 is communicated with the anode inlet of the fuel cell 6; meanwhile, hydrogen-rich gas also enters the combustion chamber 4 and is mixed with natural gas in the combustion chamber 4 for combustion, so that the CO2 emission of the gas turbine is reduced; when the liquid ammonia is heated and decomposed into hydrogen-rich gas in the intercooler 2, the oxygen content in the air in the combustion chamber 4 is more than the oxygen content required by the mixture of the hydrogen-rich gas and the natural gas, the hydrogen-rich gas and the natural gas are combusted in excessive air to generate high-temperature and high-pressure oxygen-rich gas, the oxygen-rich gas pushes the high-pressure turbine 5 to perform work and generate power, the oxygen-rich gas after performing work and generate power enters the cathode of the fuel cell 6, and the oxygen-rich gas at the outlet of the cathode of the fuel cell 6 pushes the low-pressure turbine 7 to perform work and generate power, so that the combustion efficiency of the gas turbine and the total efficiency of a power generation system are improved; the fuel cell 6 and the gas turbine are combined to generate electricity, so that the working efficiency and the output power of the combined power generation system of the intercooler and the fuel cell gas turbine are improved.
In some alternative embodiments, the hydrogen-rich gas is a mixture of ammonia vapor and nitrogen, and hydrogen. I.e. the intercooler 2 is used for evaporating and decomposing liquid ammonia, and the heat of the low-pressure compressor 1 is used for heating and decomposing the liquid ammonia to prepare hydrogen-rich gas, specifically, the decomposition reaction is as follows: 2nh3→n2+3h2.
In some alternative embodiments, the gas produced at the anode outlet is unburned hydrogen-rich gas. The hydrogen-rich gas coming out of the hydrogen-rich gas outlet of the intercooler 2 enters the anode of the fuel cell 6, and the hydrogen-rich gas reacts with the oxygen-rich gas to burn, so that the fuel cell 6 generates electricity. Wherein, the unburned hydrogen-rich gas enters the combustion chamber 4 through the anode outlet for further reaction combustion, and the arrangement avoids the waste of the unburned hydrogen-rich gas.
In some alternative embodiments, the oxygen content entering the combustion chamber 4 from the high pressure gas outlet of the high pressure compressor 3 is greater than the oxygen content required for mixing the unburnt hydrogen-rich gas with natural gas. Specifically, after being compressed by the low-pressure compressor 1, the excessive air enters the intercooler 2 for cooling, and then enters the combustion chamber 4 by the high-pressure compressor 3, at the moment, the oxygen content in the air is more than the oxygen content required by the mixture of the hydrogen-rich gas and the natural gas, and after the hydrogen-rich gas and the natural gas are combusted in the excessive air, high-temperature and high-pressure oxygen-rich gas is generated. The oxygen-enriched gas is reacted with the hydrogen-rich gas at the anode of the fuel cell 6 to burn, so that the fuel cell 6 generates electricity.
In some alternative embodiments, because air is compressed by the low-pressure compressor 1 to generate high-pressure gas, after the air enters the intercooler 2 to be cooled, the cooled high-pressure gas enters the high-pressure compressor 3 to be compressed to generate high-pressure gas, and then enters the combustion chamber 4, and the high-pressure gas and the hydrogen-rich gas in the combustion chamber 4 are combusted with the natural gas, and the generated gas is the high-temperature high-pressure oxygen-rich gas.
In some alternative embodiments, the oxygen-enriched gas pushes the high pressure turbine 5 to perform work and generate electricity, the oxygen-enriched gas is communicated with the cathode inlet and provides unburnt oxygen to the fuel cell 6 to generate electricity, the oxygen-enriched gas is communicated with the cathode outlet and pushes the low pressure turbine 7 to perform work and generate electricity, so that the combustion efficiency of the gas turbine and the overall efficiency of the power generation system are improved; the fuel cell 6 and the gas turbine are combined to generate electricity, so that the working efficiency and the output power of the combined power generation system of the intercooler and the fuel cell gas turbine are improved.
In some alternative embodiments, the low pressure compressor 1, the high pressure compressor 3, the high pressure turbine 5, the low pressure turbine 7, and the generator 8 are coaxially disposed. Through the low-pressure compressor 1, the high-pressure compressor 3, the high-pressure turbine 5, the low-pressure turbine 7 and the generator 8 which are coaxially arranged, the working performances of the low-pressure compressor 1, the high-pressure compressor 3, the high-pressure turbine 5, the low-pressure turbine 7 and the generator 8 are ensured, and the optimal working efficiency is achieved.
In some alternative embodiments, a reforming chamber for the ammonia decomposition reforming reaction is provided in the intercooler 2. By the arrangement of the reforming chamber, after the liquid ammonia enters the intercooler 2, the liquid ammonia is decomposed into hydrogen-rich gas, namely, the liquid ammonia is decomposed into mixed gas of ammonia steam, nitrogen and hydrogen.
In the present embodiment, the fuel cell 6 is a solid oxide fuel cell 6.
The invention also provides a working method of the combined power generation system of the intercooler and the fuel cell gas turbine, which comprises the following steps: the excess air from the atmosphere is initially compressed by a low-pressure compressor and then is introduced into the hot end of the intercooler 2, the liquid ammonia is introduced into the cold end of the intercooler 2, the initially compressed air is cooled by heat exchange, the cooled air is further compressed by a high-pressure compressor 3, and finally the cooled air is introduced into a combustion chamber 4; the liquid ammonia is heated and decomposed into hydrogen-rich gas in the intercooler 2, at the moment, the oxygen content in the air in the combustion chamber 4 is more than the oxygen content required by the mixture of the hydrogen-rich gas and the natural gas, the hydrogen-rich gas and the natural gas are combusted in excessive air to generate high-temperature and high-pressure oxygen-rich gas, the oxygen-rich gas pushes the high-pressure turbine 5 to perform work for power generation, the oxygen-rich gas after performing work for power generation enters the cathode of the fuel cell 6, and the oxygen-rich gas at the outlet of the cathode of the fuel cell 6 pushes the low-pressure turbine 7 to perform work for power generation; the hydrogen-rich gas is introduced into the anode of the fuel cell 6, and is subjected to electrochemical reaction with the oxygen-rich gas of the cathode to generate electricity, and the unburnt hydrogen-rich gas at the anode outlet of the fuel cell 6 is doped with natural gas.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
1. An intercooler and fuel cell gas turbine combined power generation system comprising:
The low-pressure air compressor (1), the air inlet of the low-pressure air compressor (1) is communicated with the outside air;
The hot end of the intercooler (2) is communicated with the air outlet of the low-pressure air compressor (1), the cold end of the intercooler (2) is communicated with liquid ammonia, the heat of the low-pressure air compressor (1) heats and decomposes the liquid ammonia into hydrogen-rich gas, the hydrogen-rich gas outlet of the intercooler (2) is communicated with the anode inlet of the fuel cell (6), and the cooling gas outlet of the intercooler (2) is communicated with the cooling gas inlet of the high-pressure air compressor (3);
The gas inlet of the combustion chamber (4) is communicated with a high-pressure gas outlet of the high-pressure gas compressor (3), the gas inlet of the combustion chamber (4) is communicated with natural gas, the gas inlet of the combustion chamber (4) is communicated with an anode outlet of the fuel cell (6), the gas outlet of the combustion chamber (4) is communicated with a gas inlet of the high-pressure turbine (5), and the gas outlet of the high-pressure turbine (5) is connected with the generator (8);
The cathode inlet of the fuel cell (6) is communicated with the air outlet of the high-pressure turbine (5), the cathode outlet of the fuel cell (6) is communicated with the low-pressure turbine (7), and the low-pressure turbine (7) is connected with the generator (8);
The oxygen-enriched gas pushes the high-pressure turbine (5) to do work for power generation, the oxygen-enriched gas is communicated with the cathode inlet, unburned oxygen is provided for the fuel cell (6) for power generation, the oxygen-enriched gas is communicated with the cathode outlet, and the low-pressure turbine (7) is pushed to do work for power generation.
2. The cogeneration system of an intercooler and a fuel cell gas turbine of claim 1 wherein the hydrogen rich gas is a mixture of ammonia vapor and nitrogen, and hydrogen.
3. The combined power generation system of an intercooler and a fuel cell gas turbine according to claim 1 or 2, wherein the gas produced at the anode outlet is unburned hydrogen-rich gas.
4. A combined power generation system of an intercooler and a fuel cell gas turbine according to claim 3, characterized in that the oxygen content entering the combustion chamber (4) from the high pressure gas outlet of the high pressure compressor (3) is greater than the oxygen content required for mixing the unburnt hydrogen-rich gas with natural gas.
5. The combined power generation system of an intercooler and a fuel cell gas turbine according to claim 4, wherein the generated gas after the combustion of the hydrogen-rich gas and the natural gas is oxygen-rich gas of high temperature and high pressure.
6. The combined power generation system of an intercooler and a fuel cell gas turbine according to claim 4 or 5, characterized in that the low-pressure compressor (1), the high-pressure compressor (3), the high-pressure turbine (5), the low-pressure turbine (7), and the generator (8) are coaxially arranged.
7. The combined power generation system of an intercooler and a fuel cell gas turbine according to claim 6, wherein a reforming chamber for an ammonolysis reforming reaction is provided in the intercooler (2).
8. The combined power generation system of an intercooler and a fuel cell gas turbine according to claim 7, wherein the fuel cell (6) is a solid oxide fuel cell (6).
9. Method for operating a combined power generation system of an intercooler and a fuel cell gas turbine according to any of the preceding claims 1-8, comprising:
The method comprises the steps that excessive air from the atmosphere is initially compressed by a low-pressure compressor and then is introduced into the hot end of an intercooler (2), liquid ammonia is introduced into the cold end of the intercooler (2), the initially compressed air is cooled by heat exchange, the cooled air is further compressed by a high-pressure compressor (3), and finally the cooled air is introduced into a combustion chamber (4);
The liquid ammonia is heated and decomposed into hydrogen-rich gas in the intercooler (2), at the moment, the oxygen content in the air in the combustion chamber (4) is more than the oxygen content required by the mixture of the hydrogen-rich gas and the natural gas, the hydrogen-rich gas and the natural gas are combusted in excessive air to generate high-temperature and high-pressure oxygen-rich gas, the oxygen-rich gas pushes the high-pressure turbine (5) to do work for generating electricity, the oxygen-rich gas after doing work for generating electricity enters the cathode of the fuel cell (6), and the oxygen-rich gas at the outlet of the cathode of the fuel cell (6) pushes the low-pressure turbine (7) to do work for generating electricity;
the hydrogen-rich gas is introduced into the anode of the fuel cell (6), and is subjected to electrochemical reaction with the oxygen-rich gas of the cathode to generate electricity, and the unburnt hydrogen-rich gas at the anode outlet of the fuel cell (6) is doped with natural gas.
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| CN109944700B (en) * | 2019-03-26 | 2020-07-31 | 清华大学 | Gas turbine and fuel cell combined power generation method |
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| WO2007143937A1 (en) * | 2006-05-12 | 2007-12-21 | Yun Tian | Hybrid power system for vehicle-use fuel cell, automobile including the system, the use of the system and the use of fuel cell stack |
| CN102449835A (en) * | 2009-03-30 | 2012-05-09 | 莲花汽车有限公司 | A reheated gas turbine system having a fuel cell |
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