CN117432524A - Device system and method for combined power generation of propane dehydrogenation gas turbine and fuel cell - Google Patents
Device system and method for combined power generation of propane dehydrogenation gas turbine and fuel cell Download PDFInfo
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- CN117432524A CN117432524A CN202311347898.5A CN202311347898A CN117432524A CN 117432524 A CN117432524 A CN 117432524A CN 202311347898 A CN202311347898 A CN 202311347898A CN 117432524 A CN117432524 A CN 117432524A
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- propane
- fuel cell
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 244
- 239000000446 fuel Substances 0.000 title claims abstract description 173
- 239000001294 propane Substances 0.000 title claims abstract description 124
- 238000010248 power generation Methods 0.000 title claims abstract description 92
- 238000006356 dehydrogenation reaction Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 167
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 115
- 239000001257 hydrogen Substances 0.000 claims abstract description 111
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 111
- 238000002485 combustion reaction Methods 0.000 claims abstract description 45
- 230000006835 compression Effects 0.000 claims abstract description 43
- 238000007906 compression Methods 0.000 claims abstract description 43
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 43
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000007787 solid Substances 0.000 claims abstract description 37
- 238000002360 preparation method Methods 0.000 claims abstract description 20
- 239000002918 waste heat Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 12
- 238000003487 electrochemical reaction Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 10
- 239000006227 byproduct Substances 0.000 abstract description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 5
- 239000001569 carbon dioxide Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 14
- 230000008901 benefit Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000002407 reforming Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04708—Temperature of fuel cell reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
- H01M8/0612—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants from carbon-containing material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/40—Combination of fuel cells with other energy production systems
- H01M2250/407—Combination of fuel cells with mechanical energy generators
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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
- 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)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides a device system and a method for combined power generation of a propane dehydrogenation gas turbine and a fuel cell, wherein the device system comprises a propylene preparation unit through propane dehydrogenation, a gas turbine power generation unit and a fuel cell power generation unit; the propylene preparation unit through propane dehydrogenation comprises a propane preheating device, a propane dehydrogenation device and a hydrogen compression device which are connected in sequence; the gas turbine power generation unit comprises an air compression device, a combustion chamber, a gas turbine and a first generator which are connected in sequence; the fuel cell power generation unit comprises a battery fuel preheating device, a solid oxide fuel cell, a steam turbine and a second generator which are connected in sequence. The hydrogen in the invention is derived from the by-product of propylene preparation by propane dehydrogenation, the cost is low, and the technology is mature; and the gas turbine power generation unit and the fuel cell power generation unit are used in a combined mode, so that the combined power generation efficiency of the whole device system is improved, the emission of carbon dioxide is reduced, and the application prospect is wide.
Description
Technical Field
The invention relates to the technical field of gas turbines, in particular to a device system and a method for combined power generation of a propane dehydrogenation gas turbine and a fuel cell.
Background
The source of hydrogen energy is wide, and the hydrogen production modes are various. The industrial by-product hydrogen production has the advantages of lower production cost, mature technology, high efficiency and the like. Hydrogen energy is of great interest as an important industrial feedstock and energy fuel and enters a rapid development period.
CN113756955a discloses a gas turbine power generation system and a power generation method, the gas turbine power generation system comprises a renewable energy power generation device, a hydrogen production device, a hydrogen energy storage device and a gas turbine, the renewable energy power generation device is used for supplying power to the hydrogen production device so as to enable the hydrogen production device to prepare hydrogen and oxygen, the hydrogen energy storage device is connected with the hydrogen production device, the gas turbine is respectively connected with the hydrogen production device and the hydrogen energy storage device, the hydrogen prepared by the hydrogen production device can enter the hydrogen energy storage device and the gas turbine, and the gas turbine can use air, the hydrogen prepared by the hydrogen production device and/or the hydrogen in the hydrogen energy storage device to generate power.
CN102966389a discloses a method for recycling exhaust gas waste heat of a gas turbine. The method is that the exhaust gas from the gas turbine of the gas turbine enters a reforming reactor, water and methanol with the molar ratio of 1-2:1 are added into the reforming reactor, the water and the methanol absorb the exhaust gas waste heat of the gas turbine to carry out chemical reaction under the action of a catalyst, and the reacted synthesis gas is separated by purifying equipment to obtain the hydrogen with the purity of 85-95%. The method has the advantages that the exhaust gas waste heat of the gas turbine is utilized to carry out methanol reforming to prepare hydrogen, the obtained hydrogen is used for a fuel cell power generation system, the exhaust gas waste heat of the gas turbine is utilized to carry out grade improvement and is converted into reaction synthesis gas, a new thought is provided for producing hydrogen from methanol, and the energy consumption for producing hydrogen from methanol is effectively reduced. Meanwhile, the fuel utilization rate and the power generation efficiency of the fuel cell system are improved, and the obvious energy-saving purpose is achieved.
CN107143403a discloses a hydrogen gas turbine exhaust gas waste heat utilization system, comprising: the system comprises a gas compressor, a combustion chamber, a first turbine, a second turbine, an organic working medium evaporator, an organic working medium expander, a three-phase generator, an organic working medium condenser, a working medium circulating pump and a valve. The waste heat in the tail gas of the hydrogen gas turbine is converted into high-grade electric energy, the output power of the hydrogen gas turbine is improved, the efficiency of a hydrogen gas turbine system is obviously improved, the system cost is reduced, the exhaust temperature of flue gas can be reduced, the heat pollution is reduced, the purpose of energy-saving and environment-friendly production is achieved, and the economic benefit and the social benefit of enterprises can be further improved.
However, the power generation efficiency of the gas turbine is still low compared with that of a fuel cell, and the hydrogen is used as a raw material, so that the problem of high power generation cost is also caused.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a device system and a method for combined power generation of a propane dehydrogenation gas turbine and a fuel cell, which adopt propane dehydrogenation to prepare propylene to prepare by-product high-purity and low-cost hydrogen as raw materials of the gas turbine, and combine the gas turbine and a solid oxide fuel cell to complement advantages and disadvantages of the gas turbine and the solid oxide fuel cell, so that the power generation efficiency of the whole device system is improved, and carbon dioxide emission is reduced, and the application prospect is wide.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a system for combined power generation by a propane dehydrogenation gas turbine and a fuel cell, the system comprising a unit for producing propylene by propane dehydrogenation, a gas turbine power generation unit and a fuel cell power generation unit;
the propylene preparation unit through propane dehydrogenation comprises a propane preheating device, a propane dehydrogenation device and a hydrogen compression device which are connected in sequence;
the gas turbine power generation unit comprises an air compression device, a combustion chamber, a gas turbine and a first generator which are connected in sequence;
the fuel cell power generation unit comprises a battery fuel preheating device, a solid oxide fuel cell, a steam turbine and a second power generator which are connected in sequence;
the propylene preparation unit through propane dehydrogenation is respectively connected with a combustion chamber of the gas turbine power generation unit and a battery fuel preheating device of the fuel battery power generation unit through a hydrogen compression device;
the gas turbine power generation unit is connected with a propane preheating device of a propylene preparation unit through propane dehydrogenation by a gas turbine;
the fuel cell power generation unit is connected with the combustion chamber of the gas turbine power generation unit through a solid oxide fuel cell.
The hydrogen used as fuel in the device system for combined power generation of the propane dehydrogenation gas turbine and the fuel cell is derived from propane, and the process for preparing propylene by the propane dehydrogenation has the advantages of low energy consumption, less carbon emission, high purity of byproduct hydrogen, low cost and reduction of carbon dioxide emission of combined cycle of the gas turbine. Meanwhile, the waste heat recovery is carried out on the gas turbine power generation unit and the fuel cell power generation unit, so that heat required by the reaction is provided for the propane dehydrogenation propylene production unit and the fuel cell power generation unit, the energy conversion efficiency of the whole device system is improved, and the cost of the propane dehydrogenation propylene production unit is reduced. The invention combines the gas turbine power generation unit and the fuel cell power generation unit, improves the combined power generation efficiency of the whole device system, and reduces the emission of carbon dioxide.
Preferably, the propane preheating device is a surface type gas-gas heat exchanger.
Preferably, the propane preheating device is provided with a propane conveying pipeline and an exhaust pipeline.
The waste gas discharged by the exhaust pipeline is converged with the waste gas discharged by the battery fuel preheating device and enters the condensing device.
Preferably, a propylene conveying pipeline is arranged on the propane dehydrogenation device.
The propylene produced in the propane dehydrogenation device can be used for producing high-added-value products such as polypropylene, acrylonitrile, propylene oxide, ethylene propylene rubber, nylon 66, ABS resin and the like.
Preferably, the air compression device, the gas turbine and the first generator are coaxially connected.
Preferably, the air compression device is provided with an air conveying pipeline.
Preferably, the gas turbine power generation unit further comprises a gas turbine fuel supply device and a gas turbine fuel mixing device connected in sequence.
When the present invention employs a hydrogen-loaded gas turbine, the gas turbine fuel supply may provide natural gas or other combustible gas. At this time, a portion of the hydrogen produced by the propane dehydrogenation unit is mixed with the fuel supplied from the gas turbine fuel supply unit in the fuel premixing device before entering the combustion chamber.
When the present invention employs a pure hydrogen gas turbine, the hydrogen is derived entirely from the hydrogen produced by the propane dehydrogenation unit. In this case, the gas turbine fuel supply device and the fuel premixing device may not be provided.
Preferably, the gas turbine fuel mixing device is connected to a combustion chamber.
Preferably, the gas turbine fuel mixing device is connected to a hydrogen compression device.
Preferably, the air compression device is connected to a battery fuel preheating device.
Preferably, the solid oxide fuel cell comprises an anode and a cathode.
Preferably, the fuel preheating device of the battery is connected with the anode through a hydrogen conveying pipeline.
Preferably, the battery fuel preheating device is connected with the cathode through an air delivery pipe.
Preferably, the steam turbine is connected with the battery fuel preheating device through the first steam exhaust pipeline, so that waste heat utilization can be realized, and the comprehensive efficiency of the whole device system is improved.
Preferably, the second exhaust steam pipeline is arranged on the battery fuel preheating device.
The exhaust steam of the steam turbine preheats the air and the hydrogen in the battery fuel preheating device, and the preheated exhaust steam is discharged from the second exhaust steam pipeline.
Preferably, the second generator is coaxially connected to the steam turbine.
In a second aspect, the present invention also provides a method for generating electricity by combining a propane dehydrogenation gas turbine with a fuel cell, wherein the method is performed by using the device system for generating electricity by combining a propane dehydrogenation gas turbine with a fuel cell according to the first aspect; the method comprises the following steps:
propane is heated by a propane preheating device and then enters a propane dehydrogenation device to generate propylene and hydrogen; after being compressed by the hydrogen compression device, part of the hydrogen enters the fuel preheating device of the battery and becomes preheated hydrogen; the other part enters a combustion chamber for combustion;
after being compressed by the air compression device, a part of air enters a combustion chamber to be combusted so as to push a gas turbine to rotate, and exhaust gas of the gas turbine enters a propane preheating device to heat propane; the other part enters a battery fuel preheating device and becomes preheated air;
the preheated hydrogen and the preheated air respectively enter an anode and a cathode of the solid oxide fuel cell to perform electrochemical reaction to generate electric energy; after the anode is completely preheated, hydrogen enters a combustion chamber to continue to burn, and exhaust gas generated by the cathode of the solid oxide fuel cell enters a steam turbine to do work.
The method reduces the power generation cost by taking the byproduct hydrogen of the propylene unit prepared by dehydrogenating propane as a hydrogen source of the gas turbine power generation unit and the fuel cell power generation unit; the exhaust gas of the gas turbine is sent to the propane heating device for waste heat recovery, and the exhaust gas of the steam turbine is sent to the battery fuel preheating device for waste heat recovery, so that the combined cycle efficiency of the device system is improved. In the invention, the power generation unit of the gas turbine is started, the first power generator starts to generate power, the exhaust gas of the gas turbine enters the propane preheating device, the propylene preparation unit by propane dehydrogenation is started, the propane dehydrogenation device generates hydrogen, the hydrogen enters the battery fuel preheating device, the power generation unit of the fuel battery is started, and the whole system starts to operate.
As a preferable technical scheme of the invention, the method specifically comprises the following steps:
propane is heated by a propane preheating device and then enters a propane dehydrogenation device to generate propylene and hydrogen; propylene is processed into industrial products, and after hydrogen is compressed by a hydrogen compression device, part of hydrogen enters a battery fuel preheating device and becomes preheated hydrogen; the other part of hydrogen is mixed with the gas from the gas turbine fuel supply device in the gas turbine fuel mixing device and then enters the combustion chamber to burn, so that the gas turbine is pushed to rotate, and the first coaxially arranged generator is driven to rotate for generating electricity;
after the air is compressed by the air compression device, a part of air enters a combustion chamber to be combusted so as to push a gas turbine to rotate, and the exhaust gas of the gas turbine enters a propane preheating device to heat propane; the other part of air enters a fuel preheating device of the battery and becomes preheated air;
the preheated hydrogen enters the anode of the solid oxide fuel cell, and the preheated air enters the cathode of the solid oxide fuel cell to perform electrochemical reaction to generate electric energy; after the anode is completely preheated, hydrogen enters a combustion chamber to continue to burn, exhaust steam generated by a cathode of the solid oxide fuel cell enters a steam turbine to do work, and a second coaxially arranged generator is pushed to rotate for power generation;
exhaust steam of the steam turbine enters the battery fuel preheating device through the first exhaust steam pipeline for waste heat utilization, and generated exhaust steam is discharged through the second exhaust steam pipeline.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) The hydrogen of the device system for jointly generating power by the propane dehydrogenation gas turbine and the fuel cell is derived from byproducts of propylene preparation by propane dehydrogenation, so that the cost is low and the technology is mature;
(2) The combined cycle efficiency of the device system for combined power generation of the propane dehydrogenation gas turbine and the fuel cell is high, and the carbon dioxide emission is low;
(3) The device system for combined power generation of the propane dehydrogenation gas turbine and the fuel cell provided by the invention is flexible in operation, high in starting speed, capable of carrying out hydrogen-doped and pure hydrogen operation, and capable of meeting various industrial requirements.
Drawings
FIG. 1 is a schematic diagram of a system of apparatus for combined power generation of a propane dehydrogenation gas turbine and fuel cell in accordance with example 1 of the present invention.
FIG. 2 is a schematic diagram of a system of apparatus for combined power generation of a propane dehydrogenation gas turbine and fuel cell in accordance with example 2 of the present invention.
In the figure: 1-propane preheating device; a 2-propane dehydrogenation unit; 3-a gas turbine fuel supply; 4-a gas turbine fuel mixing device; 5-an air compression device; 6-combustion chamber; 7-a gas turbine; 8-a first generator; 9-a hydrogen compression device; 10-a battery fuel preheating device; 11-solid oxide fuel cells; 12-a steam turbine; 13-a second generator.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
The present invention will be described in further detail below. The following examples are merely illustrative of the present invention and are not intended to represent or limit the scope of the invention as defined in the claims.
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention 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 are not to 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", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
It should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
It will be appreciated by those skilled in the art that the present invention necessarily includes the necessary piping, conventional valves and general pumping equipment for achieving the process integrity, but the foregoing is not a major inventive aspect of the present invention, and that the present invention is not particularly limited thereto as the layout may be automatically added by those skilled in the art based on the process flow and the equipment configuration options.
Example 1
The embodiment provides a device system for combined power generation of a propane dehydrogenation gas turbine and a fuel cell, and a schematic diagram of the device system is shown in fig. 1. This embodiment employs a hydrogen-loaded gas turbine.
The device system comprises a propylene preparation unit by propane dehydrogenation, a gas turbine power generation unit and a fuel cell power generation unit;
the propylene preparation unit by propane dehydrogenation comprises a propane preheating device 1, a propane dehydrogenation device 2 and a hydrogen compression device 9 which are connected in sequence;
the gas turbine power generation unit comprises an air compression device 5, a combustion chamber 6, a gas turbine 7 and a first power generator 8 which are connected in sequence;
the fuel cell power generation unit comprises a battery fuel preheating device 10, a solid oxide fuel cell 11, a steam turbine 12 and a second generator 13 which are connected in sequence;
the propylene preparation unit through propane dehydrogenation is respectively connected with a combustion chamber 6 of a gas turbine power generation unit and a battery fuel preheating device 10 of a fuel battery power generation unit through a hydrogen compression device 9;
the gas turbine power generation unit is connected with a propane preheating device 1 of a propylene preparation unit through propane dehydrogenation by a gas turbine 7;
the fuel cell power generation unit is connected to the combustion chamber 6 of the gas turbine power generation unit via a solid oxide fuel cell 11.
A propane conveying pipeline and an exhaust pipeline are arranged on the propane preheating device 1;
the propane dehydrogenation device 2 is provided with a propylene conveying pipeline.
The air compression device 5, the gas turbine 7 and the first generator 8 are coaxially connected.
The gas turbine power generation unit further comprises a gas turbine fuel supply device 3 and a gas turbine fuel mixing device 4 which are connected in sequence;
the gas turbine fuel mixing device 4 is connected with a combustion chamber 6;
the gas turbine fuel mixing device 4 is connected with a hydrogen compression device 9;
the air compression device 5 is connected to a battery fuel preheating device 10.
The solid oxide fuel cell includes an anode and a cathode;
the battery fuel preheating device 10 is connected with an anode through a hydrogen conveying pipeline;
the battery fuel preheating device 10 is connected with a cathode through an air delivery pipe.
The steam turbine 12 is connected to the battery fuel preheating device 10 via a first exhaust line.
The second exhaust pipe is provided on the battery fuel preheating device 10.
The second generator 13 is coaxially connected to the steam turbine 12.
The embodiment also provides a method for jointly generating electricity by the propane dehydrogenation gas turbine and the fuel cell, wherein the method is carried out by adopting the device system for jointly generating electricity by the propane dehydrogenation gas turbine and the fuel cell; the method comprises the following steps:
propane is heated by a propane preheating device 1 and then enters a propane dehydrogenation device 2 to generate propylene and hydrogen; propylene is processed into industrial products, and after hydrogen is compressed by the hydrogen compression device 9, part of hydrogen enters the battery fuel preheating device 10 and becomes preheated hydrogen; the other part of hydrogen is mixed with natural gas from the gas turbine fuel supply device 3 in the gas turbine fuel mixing device 4, and then enters the combustion chamber 6 for combustion, so that the gas turbine 7 is driven to rotate, and the first coaxially arranged generator 8 is driven to rotate for generating electricity;
after the air is compressed by the air compression device 5, a part of air enters the combustion chamber 6 to be combusted to push the gas turbine 7 to rotate, and the exhaust gas of the gas turbine 7 enters the propane preheating device 1 to heat propane; the other part of air enters the battery fuel preheating device 10 and becomes preheated air;
the preheated hydrogen enters the anode of the solid oxide fuel cell 11, and the preheated air enters the cathode of the solid oxide fuel cell 11 to perform electrochemical reaction to generate electric energy; after the anode is completely preheated, hydrogen enters a combustion chamber 6 for continuous combustion, exhaust steam generated by the cathode of a solid oxide fuel cell 11 enters a steam turbine 12 for acting, and a coaxially arranged second generator 13 is pushed to rotate for power generation;
exhaust gas of the steam turbine 12 enters the battery fuel preheating device 10 through a first exhaust gas pipeline for waste heat utilization, and generated waste gas is discharged through a second exhaust gas pipeline.
Example 2
The embodiment provides a device system for combined power generation of a propane dehydrogenation gas turbine and a fuel cell, and a schematic diagram of the device system is shown in fig. 2. The present embodiment employs a pure hydrogen gas turbine.
The device system comprises a propylene preparation unit by propane dehydrogenation, a gas turbine power generation unit and a fuel cell power generation unit;
the propylene preparation unit by propane dehydrogenation comprises a propane preheating device 1, a propane dehydrogenation device 2 and a hydrogen compression device 9 which are connected in sequence;
the gas turbine power generation unit comprises an air compression device 5, a combustion chamber 6, a gas turbine 7 and a first power generator 8 which are connected in sequence;
the fuel cell power generation unit comprises a battery fuel preheating device 10, a solid oxide fuel cell 11, a steam turbine 12 and a second generator 13 which are connected in sequence;
the propylene preparation unit through propane dehydrogenation is respectively connected with a combustion chamber 6 of a gas turbine power generation unit and a battery fuel preheating device 10 of a fuel battery power generation unit through a hydrogen compression device 9;
the gas turbine power generation unit is connected with a propane preheating device 1 of a propylene preparation unit through propane dehydrogenation by a gas turbine 7;
the fuel cell power generation unit is connected to the combustion chamber 6 of the gas turbine power generation unit via a solid oxide fuel cell 11.
A propane conveying pipeline and an exhaust pipeline are arranged on the propane preheating device 1;
the propane dehydrogenation device 2 is provided with a propylene conveying pipeline.
The air compression device 5, the gas turbine 7 and the first generator 8 are coaxially connected.
The air compression device 5 is connected to a battery fuel preheating device 10.
The solid oxide fuel cell includes an anode and a cathode;
the battery fuel preheating device 10 is connected with an anode through a hydrogen conveying pipeline;
the battery fuel preheating device 10 is connected with a cathode through an air delivery pipe.
The steam turbine 12 is connected to the battery fuel preheating device 10 via a first exhaust line.
The second exhaust pipe is provided on the battery fuel preheating device 10.
The second generator 13 is coaxially connected to the steam turbine 12.
The embodiment also provides a method for jointly generating electricity by the propane dehydrogenation gas turbine and the fuel cell, wherein the method is carried out by adopting the device system for jointly generating electricity by the propane dehydrogenation gas turbine and the fuel cell;
the method comprises the following steps:
propane is heated by a propane preheating device 1 and then enters a propane dehydrogenation device 2 to generate propylene and hydrogen; propylene is processed into industrial products, and after hydrogen is compressed by the hydrogen compression device 9, part of hydrogen enters the battery fuel preheating device 10 and becomes preheated hydrogen; the other part of hydrogen enters the combustion chamber 6 to burn, so as to push the gas turbine 7 to rotate and drive the first coaxially arranged generator 8 to rotate for generating electricity;
after the air is compressed by the air compression device 5, a part of air enters the combustion chamber 6 to be combusted to push the gas turbine 7 to rotate, and the exhaust gas of the gas turbine 7 enters the propane preheating device 1 to heat propane; the other part of air enters the battery fuel preheating device 10 and becomes preheated air;
the preheated hydrogen enters the anode of the solid oxide fuel cell 11, and the preheated air enters the cathode of the solid oxide fuel cell 11 to perform electrochemical reaction to generate electric energy; after the anode is completely preheated, hydrogen enters a combustion chamber 6 for continuous combustion, exhaust steam generated by the cathode of a solid oxide fuel cell 11 enters a steam turbine 12 for acting, and a coaxially arranged second generator 13 is pushed to rotate for power generation;
exhaust gas of the steam turbine 12 enters the battery fuel preheating device 10 through a first exhaust gas pipeline for waste heat utilization, and generated waste gas is discharged through a second exhaust gas pipeline.
In the present embodiment, 2215Nm 3 Heating propane at 20 ℃ and 0.1MPa to 420 ℃ by a propane preheating device 1, and then entering a propane dehydrogenation device 2 to generate propylene and hydrogen; the outlet hydrogen temperature was reduced to 60 ℃ as a result of the dehydrogenation of propane to an endothermic reaction.
Propylene was processed as an industrial product, 20% flow hydrogen 443Nm 3 After being compressed to 1.6MPa by the hydrogen compression device 9, the mixture enters the battery fuel preheating device 10 and is preheated to 100 ℃ by the exhaust steam of the steam turbine 12; 80% flow of hydrogen 1772Nm 3 /h and 13Nm of anode exhaust gas of solid oxide fuel cell 11 3 After mixing/h, the mixture is burnt in a combustion chamber 6, so that the gas turbine 7 is pushed to do work, the output electric power is 0.986MW, the exhaust steam is 0.3MPa, the temperature is 540 ℃, and the pressure is 1785Nm 3 And (h) preheating propane in a propane preheating device 1, and cooling to 65 ℃;
after being compressed by the air compression device 5, one part of air enters the combustion chamber 6 to be combusted to drive the gas turbine 7 to rotate, and the other part of air enters the battery fuel preheating device 10 to become preheated air;
the preheated hydrogen enters the anode of the solid oxide fuel cell 11, and the preheated air enters the cathode of the solid oxide fuel cell 11 to perform electrochemical reaction to generate electric energy; the power generation efficiency of the solid oxide fuel cell 11 was 60%,0.585Nm 3 The power per hour is 1kW, and the generated electric power is 0.757MW; high temperature and high pressure steam generated by the cathode of the solid oxide fuel cell 11 was 1.5MPa, 650 ℃ and 430Nm 3 The steam turbine 12 is put into the reactor for doing work to drive the second generator 13 which is coaxially arranged to rotate for generating electricity, and the generated electric power is 0.032MW;
the exhaust gas of the steam turbine 12 was 8kPa, 150℃and 430Nm 3 And/h enters the fuel of the battery through the first exhaust pipelineWaste heat utilization is carried out in the preheating device 10, and generated waste steam at 65 ℃ is discharged through a second steam discharge pipeline and is converged with gas turbine steam discharge to enter a condensing device.
The device system for combined power generation of the propane dehydrogenation gas turbine and the fuel cell provided in the embodiment adopts a pure hydrogen gas turbine, and consumes 2215Nm of hydrogen 3 And/h, the total power of the output electricity is 1.775MW, and the power generation efficiency reaches 52.7%.
In the prior art, a pure hydrogen combustion engine with a certain imported brand is adopted, and the consumption of hydrogen is 2215Nm 3 And/h, the output power is 1.516MW, and the power generation efficiency is 45% after the waste heat boiler is matched. The device system for combined power generation of the propane dehydrogenation gas turbine and the fuel cell is about 7.7% higher than the efficiency of the combined cycle system of the gas turbine and the waste heat boiler. In addition, the method of combining the fuel cell with the gas engine is adopted in the system, so that the startup time of propane dehydrogenation and the fuel cell is shortened, and the operation flexibility of the whole system is improved.
The applicant states that the detailed structural features of the present invention are described by the above embodiments, but the present invention is not limited to the above detailed structural features, i.e. it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be apparent to those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope of the present invention and the scope of the disclosure.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
Claims (10)
1. A device system for combined power generation of a propane dehydrogenation gas turbine and a fuel cell, which is characterized by comprising a propylene preparation unit by propane dehydrogenation, a gas turbine power generation unit and a fuel cell power generation unit;
the propylene preparation unit through propane dehydrogenation comprises a propane preheating device, a propane dehydrogenation device and a hydrogen compression device which are connected in sequence;
the gas turbine power generation unit comprises an air compression device, a combustion chamber, a gas turbine and a first generator which are connected in sequence;
the fuel cell power generation unit comprises a battery fuel preheating device, a solid oxide fuel cell, a steam turbine and a second power generator which are connected in sequence;
the propylene preparation unit through propane dehydrogenation is respectively connected with a combustion chamber of the gas turbine power generation unit and a battery fuel preheating device of the fuel battery power generation unit through a hydrogen compression device;
the gas turbine power generation unit is connected with a propane preheating device of a propylene preparation unit through propane dehydrogenation by a gas turbine;
the fuel cell power generation unit is connected with the combustion chamber of the gas turbine power generation unit through a solid oxide fuel cell.
2. The plant system according to claim 1, wherein the propane pre-heating device is provided with a propane delivery conduit and an exhaust conduit;
preferably, a propylene conveying pipeline is arranged on the propane dehydrogenation device.
3. The plant arrangement according to claim 1 or 2, characterized in that the air compression device, the gas turbine and the first generator are connected coaxially;
preferably, the air compression device is provided with an air conveying pipeline.
4. A plant system according to any one of claims 1-3, wherein the gas turbine power generation unit further comprises a gas turbine fuel supply and a gas turbine fuel mixing device connected in sequence;
preferably, the gas turbine fuel mixing device is connected to a combustion chamber;
preferably, the gas turbine fuel mixing device is connected with a hydrogen compression device;
preferably, the air compression device is connected to a battery fuel preheating device.
5. The plant system according to any one of claims 1 to 4, wherein the solid oxide fuel cell comprises an anode and a cathode;
preferably, the battery fuel preheating device is connected with the anode through a hydrogen conveying pipeline;
preferably, the battery fuel preheating device is connected with the cathode through an air delivery pipe.
6. The plant arrangement according to any of claims 1-5, characterized in that the steam turbine is connected to a battery fuel preheating device via a first exhaust duct.
7. The plant arrangement according to any one of claims 1-6, characterized in that the battery fuel preheating device is provided with a second exhaust duct.
8. The plant arrangement according to any of the claims 1-7, characterized in that the second generator is connected coaxially to the steam turbine.
9. A method for combined power generation of a propane dehydrogenation gas turbine and a fuel cell, which is characterized in that the method is carried out by adopting the device system for combined power generation of the propane dehydrogenation gas turbine and the fuel cell according to any one of claims 1 to 8; the method comprises the following steps:
propane is heated by a propane preheating device and then enters a propane dehydrogenation device to generate propylene and hydrogen; after being compressed by the hydrogen compression device, part of the hydrogen enters the fuel preheating device of the battery and becomes preheated hydrogen; the other part enters a combustion chamber for combustion;
after being compressed by the air compression device, a part of air enters a combustion chamber to be combusted so as to push a gas turbine to rotate, and exhaust gas of the gas turbine enters a propane preheating device to heat propane; the other part enters a battery fuel preheating device and becomes preheated air;
the preheated hydrogen and the preheated air respectively enter an anode and a cathode of the solid oxide fuel cell to perform electrochemical reaction to generate electric energy; after the anode is completely preheated, hydrogen enters a combustion chamber to continue to burn, and exhaust gas generated by the cathode of the solid oxide fuel cell enters a steam turbine to do work.
10. The method according to claim 9, characterized in that it comprises in particular the steps of:
propane is heated by a propane preheating device and then enters a propane dehydrogenation device to generate propylene and hydrogen; propylene is processed into industrial products, and after hydrogen is compressed by a hydrogen compression device, part of hydrogen enters a battery fuel preheating device and becomes preheated hydrogen; the other part of hydrogen is mixed with the gas from the gas turbine fuel supply device in the gas turbine fuel mixing device and then enters the combustion chamber to burn, so that the gas turbine is pushed to rotate, and the first coaxially arranged generator is driven to rotate for generating electricity;
after the air is compressed by the air compression device, a part of air enters a combustion chamber to be combusted so as to push a gas turbine to rotate, and the exhaust gas of the gas turbine enters a propane preheating device to heat propane; the other part of air enters a fuel preheating device of the battery and becomes preheated air;
the preheated hydrogen enters the anode of the solid oxide fuel cell, and the preheated air enters the cathode of the solid oxide fuel cell to perform electrochemical reaction to generate electric energy; after the anode is completely preheated, hydrogen enters a combustion chamber to continue to burn, exhaust steam generated by a cathode of the solid oxide fuel cell enters a steam turbine to do work, and a second coaxially arranged generator is pushed to rotate for power generation;
exhaust steam of the steam turbine enters the battery fuel preheating device through the first exhaust steam pipeline for waste heat utilization, and generated exhaust steam is discharged through the second exhaust steam pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311347898.5A CN117432524A (en) | 2023-10-18 | 2023-10-18 | Device system and method for combined power generation of propane dehydrogenation gas turbine and fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311347898.5A CN117432524A (en) | 2023-10-18 | 2023-10-18 | Device system and method for combined power generation of propane dehydrogenation gas turbine and fuel cell |
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| CN (1) | CN117432524A (en) |
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