CN107946612B - High-temperature gas heat exchanger of solid oxide fuel cell - Google Patents
High-temperature gas heat exchanger of solid oxide fuel cell Download PDFInfo
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- CN107946612B CN107946612B CN201711342580.2A CN201711342580A CN107946612B CN 107946612 B CN107946612 B CN 107946612B CN 201711342580 A CN201711342580 A CN 201711342580A CN 107946612 B CN107946612 B CN 107946612B
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- Prior art keywords
- cold air
- gas
- heat exchanger
- flue gas
- gas flow
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- 239000000446 fuel Substances 0.000 title claims abstract description 29
- 239000007787 solid Substances 0.000 title claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 67
- 239000002737 fuel gas Substances 0.000 claims abstract description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003546 flue gas Substances 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000003466 welding Methods 0.000 claims abstract description 17
- 238000005219 brazing Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims description 11
- 239000000779 smoke Substances 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000009827 uniform distribution Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 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
-
- 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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Combustion & Propulsion (AREA)
Abstract
The invention discloses a high-temperature gas heat exchanger of a solid oxide fuel cell, which comprises a hot flue gas inlet/outlet pipeline, a cold air/fuel gas inlet/outlet pipeline, a flue gas splitter plate, a cold air/fuel gas splitter plate, a gas splitter plate and a sealing strip. According to the high-temperature gas heat exchanger of the solid oxide fuel cell, the high-temperature brazing or laser welding is adopted for each part to ensure the air tightness of each joint surface, each repeated unit can be processed independently and then processed integrally, and the heat exchange efficiency of gas can be fully improved by adjusting the shape of the flow dividing plate and the thickness of the gas dividing plate, so that the assembly is simple, stable and reliable.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a high-temperature gas heat exchanger of a solid oxide fuel cell.
Background
The Solid Oxide Fuel Cell (SOFC) is a device for directly converting chemical energy in hydrocarbon fuel into electric energy through electrochemical reaction, and has the advantages of high conversion efficiency, no pollution, low fuel selectivity and the like. The SOFC independent power generation system comprises a pile and a peripheral system (BOP), and the working process is as follows: the air is input into a heat exchanger through a blower for preheating, and the preheated air enters an SOFC cathode; the hydrogen or other reformed hydrocarbon fuel gas enters the SOFC anode after being preheated by a heat exchanger; the air in the cathode and the fuel gas which is not reacted with the anode enter a combustion chamber for full combustion, and the hot flue gas after combustion enters a heat exchanger for preheating the cold air and the fuel gas; the high-temperature flue gas flowing out of the heat exchanger still has a certain utilization value, and can be used for secondary power generation of a turbine; the hot flue gas after the process can also meet the heat demand of household heating and hot water.
The current working temperature of SOFCs is mainly concentrated at medium-high temperature (600-800 ℃), so that the highest working temperature of the heat exchanger is required to be higher than 800 ℃, and the heat exchanger needs to withstand a large temperature gradient because the temperature of cold air/fuel gas is close to room temperature before entering the heat exchanger, so that high-temperature heat-resistant alloy is often used as a forming material of the heat exchanger. Because the heat exchanger has a complex structure, the heat exchanger cannot be directly manufactured by mechanical processing, and the structure of the heat exchanger needs to be split and then respectively molded and then spliced; because the hot flue gas, the cold flue gas flow channel and the external environment need to be separated absolutely, the absolute sealing of the splicing interface needs to be ensured. In order to ensure heat exchange efficiency, the steel plates used for the heat exchanger isolating plate are thinner, and different components can be welded only through high-temperature brazing. The heat exchanger is an important component of the BOP and it is necessary to ensure as high a heat exchange efficiency as possible. The high-temperature heat exchanger has a complex structure and a severe working environment, so that the processing difficulty is extremely high, and the high-temperature heat exchanger product applied to the solid oxide fuel cell is still seen in China.
Disclosure of Invention
In view of the above, the invention aims to provide a high-temperature gas heat exchanger of a solid oxide fuel cell, which is used for preheating cold air and fuel gas and has the advantages of simple processing, high reliability and easy structure adjustment.
In order to solve the technical problems, the invention provides a high-temperature gas heat exchanger of a solid oxide fuel cell, which comprises:
a hot flue gas inlet/outlet pipe for hot flue gas to enter and exit the heat exchanger;
a cold air/fuel gas inlet/outlet pipe for the cold air/fuel gas to enter and exit the heat exchanger;
the flue gas flow dividing plate is used for uniformly distributing gas in the hot flue gas flow channel;
a cold air/fuel gas manifold for uniform distribution of gas in the cold air/fuel gas flow channels;
a gas separation plate for separating the heat-insulating flue gas and the cold air/fuel gas;
the sealing strip is used for isolating the hot smoke gas flow channel from the cold air/fuel gas flow channel and the external environment of the heat exchanger;
the flue gas splitter plate, the gas splitter plate and the sealing strip form a hot flue gas flow channel; the cold air/fuel gas flow dividing plate, the gas dividing plate and the sealing strip form a cold air/fuel gas flow channel;
the hot flue gas flow channel and the cold air/fuel gas flow channel form a structural unit, the structural units are orderly stacked in sequence in the up-down direction to form the heat exchanger, and the hot flue gas flow channel and the cold air/fuel gas flow channel are alternately distributed in the up-down direction and are used for heat exchange.
Preferably, the hot flue gas inlet/outlet pipeline, the cold air/fuel gas inlet/outlet pipeline, the gas separation plate and the sealing strip are all connected by high-temperature brazing or laser welding, and the sealing strip is used for ensuring the air tightness of each interface.
The hot flue gas inlet/outlet pipeline, the cold air/fuel gas inlet/outlet pipeline, the flue gas splitter plate, the cold air/fuel gas splitter plate, the gas splitter plate and the sealing strip are all made of high-temperature heat-resistant alloy.
In a preferred embodiment of the present invention, the cold air/fuel gas dividing plate is divided into two parts, namely a cold air inlet guide plate and a cold air main dividing plate, and the cold air inlet guide plate is used for ensuring that the gas uniformly enters the cold air main dividing plate.
In a preferred embodiment of the invention, the thickness of the hot flue gas splitter plate and the cold air/fuel gas splitter plate is slightly less than the thickness of the sealing strip for ensuring insertion into the hot flue gas flow channel and the cold air/fuel gas flow channel.
Preferably, the flue gas diversion plate and the cold air/fuel gas diversion plate can be processed into different shapes through rolling or stamping forming, so that the gas flow path is increased, and the heat exchange efficiency is improved.
In a preferred embodiment of the present invention, the sealing strips are divided into hot flue gas sealing strips and cold air sealing strips, welded between adjacent gas separation plates, and distributed alternately, for providing independent gas flow chambers for the hot flue gas flow channels and the cold air/fuel gas flow channels.
The invention can split the heat exchanger into a plurality of structural units, each structural unit is split into small components with regular shapes, each welding surface is ensured to be a plane, the welding reliability is improved while the welding difficulty is reduced, and the welding quality is easy to check. The invention can easily change the size of each component and the shape of the flow dividing plate according to the requirements of different heat exchangers so as to meet the requirements of different heat exchange gas amounts and fluid resistances. According to the high-temperature gas heat exchanger of the solid oxide fuel cell, the high-temperature brazing or laser welding is adopted for each part to ensure the air tightness of each joint surface, each repeated unit can be processed independently and then processed integrally, and the heat exchange efficiency of gas can be fully improved by adjusting the shape of the flow dividing plate and the thickness of the gas dividing plate, so that the assembly is simple, stable and reliable.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a high temperature gas heat exchanger for a solid oxide fuel cell according to an embodiment of the present invention;
FIG. 2 is a split view of a structural unit of a high temperature gas heat exchanger for a solid oxide fuel cell according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a solid oxide fuel cell high temperature gas heat exchanger according to an embodiment of the present invention;
fig. 4 is an overall split view of a high temperature gas heat exchanger for a solid oxide fuel cell according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 4, fig. 1 is an overall schematic diagram of a solid oxide fuel cell gas heat exchanger according to an embodiment of the present invention; FIG. 2 is a split view of a structural unit of a solid oxide fuel cell gas heat exchanger according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a solid oxide fuel cell gas heat exchanger according to an embodiment of the present invention; fig. 4 is an overall split view of a solid oxide fuel cell gas heat exchanger provided in an embodiment of the present invention.
Specifically, as shown in fig. 1, the high-temperature gas heat exchanger of the solid oxide fuel cell of the present invention comprises a gas separation plate 1, a cold gas inlet guide plate 2, a cold gas main guide plate 3, a flue gas guide plate 4, a hot flue gas seal 5 and a cold gas seal 10, wherein the cold gas inlet guide plate 2 and the cold gas main guide plate 3 form a cold air/fuel gas guide plate, and the hot flue gas seal 5 and the cold gas seal 10 form a seal. The cold air inlet guide plate 2, the cold air main guide plate 3 and the smoke guide plate 4 are fixed at the corresponding positions of the gas separation plate 1 through spot welding, the gas separation plate 1, the hot smoke sealing strip 5 and the cold air sealing strip 10 are placed at the positions shown in fig. 2, ni-based brazing filler metal is added between the hot smoke sealing strip 5 and the cold air sealing strip 10 and the gas separation plate 1, after the solid positions are welded through spot welding, brazing is carried out at a high temperature, and then the smoke guide plate 4 and the cold air/fuel gas guide plate are placed at the corresponding positions respectively to form a hot smoke air flow channel and a cold air/fuel air flow channel respectively, so that the structural units shown in fig. 3 are prepared, and each structural unit comprises one hot smoke air flow channel and one cold air/fuel air flow channel. The structural units are orderly stacked in sequence, a layer of gas separation plate 1 is added on the uppermost surface, ni-based brazing filler metal is added at each interface, and high-temperature brazing is performed under the condition of pressurization, so that the heat exchanger main body of the invention is manufactured. The hot flue gas inlet pipe 6, the hot flue gas outlet pipe 7, the cold air/fuel gas inlet pipe 8 and the cold air/fuel gas outlet pipe 9 are connected with the heat exchanger main body through high-temperature brazing to form a complete solid oxide fuel cell gas heat exchanger integrally, as shown in figures 1 and 4. In addition to high temperature brazing, laser welding may also be used as a means of welding.
The invention can split the heat exchanger into a plurality of structural units, each structural unit is split into small components with regular shapes, each welding surface is ensured to be a plane, the welding reliability is improved while the welding difficulty is reduced, and the welding quality is easy to check. The invention can easily change the size of each component and the shape of the flow dividing plate according to the requirements of different heat exchangers so as to meet the requirements of different heat exchange gas amounts and fluid resistances. According to the high-temperature gas heat exchanger of the solid oxide fuel cell, the high-temperature brazing or laser welding is adopted for each part to ensure the air tightness of each joint surface, each repeated unit can be processed independently and then processed integrally, and the heat exchange efficiency of gas can be fully improved by adjusting the shape of the flow dividing plate and the thickness of the gas dividing plate, so that the assembly is simple, stable and reliable.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (4)
1. A solid oxide fuel cell high temperature gas heat exchanger comprising:
a hot flue gas inlet/outlet pipe for hot flue gas to enter and exit the heat exchanger;
a cold air/fuel gas inlet/outlet pipe for the cold air/fuel gas to enter and exit the heat exchanger;
the flue gas flow dividing plate is used for uniformly distributing gas in the hot flue gas flow channel;
a cold air/fuel gas manifold for uniform distribution of gas in the cold air/fuel gas flow channels;
a gas separation plate for separating the heat-insulating flue gas and the cold air/fuel gas;
the sealing strip is used for isolating the hot smoke gas flow channel from the cold air/fuel gas flow channel and the external environment of the heat exchanger;
the flue gas splitter plate, the gas splitter plate and the sealing strip form a hot flue gas flow channel; the cold air/fuel gas flow dividing plate, the gas dividing plate and the sealing strip form a cold air/fuel gas flow channel;
the hot smoke gas flow channel and the cold air/fuel gas flow channel form a structural unit, the structural units are orderly stacked in sequence in the up-down direction to form the heat exchanger, and the hot smoke gas flow channel and the cold air/fuel gas flow channel are alternately distributed in the up-down direction and are used for heat exchange;
the hot flue gas inlet/outlet pipeline, the cold air/fuel gas inlet/outlet pipeline, the gas separation plate and the sealing strip are all connected by high-temperature brazing or laser welding and are used for ensuring the air tightness of each interface;
the hot flue gas inlet/outlet pipeline, the cold air/fuel gas inlet/outlet pipeline, the flue gas splitter plate, the cold air/fuel gas splitter plate, the gas splitter plate and the sealing strip are all made of high-temperature heat-resistant alloy;
the cold air/fuel gas splitter plate is divided into two parts, namely a cold air inlet splitter plate and a cold air main splitter plate, wherein the cold air inlet splitter plate is used for ensuring that gas uniformly enters the cold air main splitter plate.
2. The solid oxide fuel cell high temperature gas heat exchanger of claim 1, wherein: the thickness of the flue gas diversion plate and the cold air/fuel gas diversion plate is slightly smaller than that of the sealing strip, so that the flue gas diversion plate and the cold air/fuel gas diversion plate can be inserted into the hot flue gas flow channel and the cold air/fuel gas flow channel.
3. The solid oxide fuel cell high temperature gas heat exchanger of claim 1, wherein: the flue gas splitter plate and the cold air/fuel gas splitter plate can be processed into different shapes through rolling or stamping forming, so that the gas flow path is increased, and the heat exchange efficiency is improved.
4. The solid oxide fuel cell high temperature gas heat exchanger of claim 1, wherein: the sealing strips are divided into hot flue gas sealing strips and cold air sealing strips, are welded between adjacent gas separation plates, and are distributed at intervals to provide independent airflow cavities for the hot flue gas flow channels and the cold air/fuel gas flow channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711342580.2A CN107946612B (en) | 2017-12-14 | 2017-12-14 | High-temperature gas heat exchanger of solid oxide fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711342580.2A CN107946612B (en) | 2017-12-14 | 2017-12-14 | High-temperature gas heat exchanger of solid oxide fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107946612A CN107946612A (en) | 2018-04-20 |
| CN107946612B true CN107946612B (en) | 2023-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201711342580.2A Active CN107946612B (en) | 2017-12-14 | 2017-12-14 | High-temperature gas heat exchanger of solid oxide fuel cell |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801028B (en) * | 2018-05-23 | 2019-09-06 | 浙江富源制冷设备股份有限公司 | A kind of micro-channel heat exchanger and its installation method in Cold Chain Logistics field |
| CN114497624A (en) * | 2021-12-29 | 2022-05-13 | 武汉科技大学 | Reforming and heat exchange integrated device for solid oxide fuel cell system |
| CN118538974A (en) * | 2024-07-26 | 2024-08-23 | 武汉船用电力推进装置研究所(中国船舶集团有限公司第七一二研究所) | Fuel cell power generation module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1543003A (en) * | 2003-05-02 | 2004-11-03 | 松下电器产业株式会社 | Fuel cell power generator |
| JP2007227124A (en) * | 2006-02-23 | 2007-09-06 | Mitsubishi Electric Corp | Fuel-cell power generation system |
| CN101494294A (en) * | 2008-01-23 | 2009-07-29 | 中国科学院宁波材料技术与工程研究所 | Catalytic reforming plant for solid-oxide fuel battery |
| CN102479969A (en) * | 2010-11-19 | 2012-05-30 | 朱益辉 | Ring cylinder power cell different from traditional structure |
| CN207611823U (en) * | 2017-12-14 | 2018-07-13 | 武汉华科福赛新能源有限责任公司 | A kind of solid oxide fuel cell high-temperature gas heat exchanger |
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2017
- 2017-12-14 CN CN201711342580.2A patent/CN107946612B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1543003A (en) * | 2003-05-02 | 2004-11-03 | 松下电器产业株式会社 | Fuel cell power generator |
| JP2007227124A (en) * | 2006-02-23 | 2007-09-06 | Mitsubishi Electric Corp | Fuel-cell power generation system |
| CN101494294A (en) * | 2008-01-23 | 2009-07-29 | 中国科学院宁波材料技术与工程研究所 | Catalytic reforming plant for solid-oxide fuel battery |
| CN102479969A (en) * | 2010-11-19 | 2012-05-30 | 朱益辉 | Ring cylinder power cell different from traditional structure |
| CN207611823U (en) * | 2017-12-14 | 2018-07-13 | 武汉华科福赛新能源有限责任公司 | A kind of solid oxide fuel cell high-temperature gas heat exchanger |
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| CN107946612A (en) | 2018-04-20 |
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