WO2014156013A1 - 燃料改質器及び燃料電池 - Google Patents
燃料改質器及び燃料電池 Download PDFInfo
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- WO2014156013A1 WO2014156013A1 PCT/JP2014/001354 JP2014001354W WO2014156013A1 WO 2014156013 A1 WO2014156013 A1 WO 2014156013A1 JP 2014001354 W JP2014001354 W JP 2014001354W WO 2014156013 A1 WO2014156013 A1 WO 2014156013A1
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- fuel
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- fuel reformer
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- reforming
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/04—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
- B01J8/0446—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical
- B01J8/0461—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical in two or more cylindrical annular shaped beds
- B01J8/0465—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds the flow within the beds being predominantly vertical in two or more cylindrical annular shaped beds the beds being concentric
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/04—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
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- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
- C01B3/384—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts the catalyst being continuously externally heated
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- 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
- H01M8/0618—Reforming processes, e.g. autothermal, partial oxidation or steam reforming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00504—Controlling the temperature by means of a burner
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/0053—Controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00796—Details of the reactor or of the particulate material
- B01J2208/00823—Mixing elements
- B01J2208/00831—Stationary elements
- B01J2208/00849—Stationary elements outside the bed, e.g. baffles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/02—Processes carried out in the presence of solid particles; Reactors therefor with stationary particles
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
- C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
- C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
- C01B2203/0233—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step the reforming step being a steam reforming step
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- C—CHEMISTRY; METALLURGY
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/06—Integration with other chemical processes
- C01B2203/066—Integration with other chemical processes with fuel cells
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
- C01B2203/0811—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel
- C01B2203/0816—Heating by flames
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
- C01B2203/0811—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel
- C01B2203/0822—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel the fuel containing hydrogen
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
- C01B2203/0811—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel
- C01B2203/0827—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel at least part of the fuel being a recycle stream
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- C—CHEMISTRY; METALLURGY
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/12—Feeding the process for making hydrogen or synthesis gas
- C01B2203/1288—Evaporation of one or more of the different feed components
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/12—Feeding the process for making hydrogen or synthesis gas
- C01B2203/1288—Evaporation of one or more of the different feed components
- C01B2203/1294—Evaporation by heat exchange with hot process stream
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- 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
- H01M2008/1293—Fuel cells with solid oxide electrolytes
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Definitions
- the present invention relates to a fuel reformer mainly used for a fuel cell.
- FIG. 1 shows an example of a fuel cell.
- the fuel cell 101 is a solid oxide fuel cell, and generates power using fuel gas such as city gas, water, and air.
- the fuel cell 101 includes an evaporator 102, an air preheater 103, a fuel reformer 104, a burner 105, a power generation cell 106, and the like.
- the evaporator 102 generates water vapor by heating water.
- the generated water vapor is mixed with fuel gas that has been subjected to a treatment such as desulfurization and sent to the fuel reformer 104.
- the mixed gas of fuel gas and water vapor is reformed into a high-temperature reformed gas mainly composed of hydrogen in the fuel reformer 104 and supplied to the power generation cell 106.
- the air is heated in the air preheater 103 and then supplied to the power generation cell 106.
- the power generation cell 106 is maintained in a predetermined operating temperature range in the range of 700 ° C. to 900 ° C. by supplying high-temperature reformed gas and air.
- the power generation cell 106 is composed of a plurality of single cells that generate an electromotive force by a chemical reaction.
- a chemical reaction occurs in each single cell while the reformed gas passes through the anode side of each single cell and air passes through the cathode side of each single cell.
- An electromotive force is generated. Electric power is generated by taking out the electromotive force from each single cell.
- the modified high-temperature reformed gas and air discharged from the power generation cell 106 are sent to the burner 105.
- the reformed gas and air are mixed and burned, thereby heating the fuel reformer 104.
- the exhaust gas generated in the burner 105 is sent to the air preheater 103, and is heated and exhausted after heat exchange.
- Patent Document 1 The specific structure of the fuel reformer is disclosed in Patent Document 1 and Patent Document 2, for example.
- Patent Document 1 discloses a fuel reformer in which a reforming catalyst is disposed in a central portion of the fuel reformer.
- a vertically long combustion gas passage is provided inside the fuel reformer, and a reaction tube protruding downward is installed at the center of the combustion gas passage.
- a combustor that generates a flame is installed below the reaction tube, and a protruding portion of the reaction tube faces the combustor.
- the reaction tube has a double tube structure, and the reforming catalyst is disposed only at the outer peripheral portion of the reaction tube, and is not disposed at the protruding end portion of the reaction tube.
- Patent Document 2 discloses a fuel reformer in which a reforming catalyst is disposed around a fuel reformer.
- a hollow cylindrical combustion cylinder containing a burner is installed in the center of the fuel reformer, and a cylindrical reforming catalyst layer is disposed around the combustion cylinder.
- the fuel reformer of Patent Document 2 can be reformed more efficiently because the amount of the reforming catalyst is larger than that of Patent Document 1, but the heat of the burner is used as the reforming catalyst. It is transmitted only indirectly.
- a main object of the present invention is to provide a fuel reformer that can be efficiently reformed with a simple structure.
- the fuel reformer disclosed is a fuel reformer that generates reformed gas using fuel gas by catalytic action.
- a main body having a combustion chamber extending in a cylindrical shape between the first end and the second end, a combustion nozzle disposed on the first end side of the combustion chamber and generating a flame by injection of combustion gas;
- An exhaust pipe disposed on the two end sides for exhausting exhaust gas generated in the combustion chamber; a gas flow gap provided along the outer shell of the combustion chamber in a state isolated from the inside of the combustion chamber;
- An outer reforming section formed by filling a gas circulation gap with a reforming catalyst; a fuel gas introduction pipe located upstream of the outer reforming section for introducing fuel gas into the gas circulation gap; and the outer side
- a reformed gas outlet pipe that is positioned downstream of the reforming section and guides the reformed gas from the gas flow gap.
- a columnar protrusion is disposed inside the combustion chamber, has an internal space isolated from the combustion chamber, and communicates with the fuel gas introduction pipe and the gas flow gap. And a gap.
- the flame generated at the combustion nozzle grows and concentrates in the center of the combustion chamber while moving toward the second end side. Therefore, the portion of the outer reforming portion located on the second end side from the combustion nozzle is unlikely to transmit combustion heat, and heating tends to be inefficient.
- the high-temperature exhaust gas flow collides with the protrusions of the columnar protrusions and flows into the gap extending in a cylindrical shape along the outer reforming portion. Therefore, the combustion heat of the exhaust gas flow can be efficiently transmitted to the outer reforming section.
- the columnar reforming portion is formed by filling the internal space of the columnar protrusion with a reforming catalyst.
- the fuel gas introduction pipe is inserted into the internal space of the columnar protruding portion, and a tip portion for allowing the fuel gas to flow out is disposed at the protruding portion of the columnar protruding portion while being covered with the reforming catalyst.
- the fuel gas is reformed while passing through both the columnar reforming section and the outer reforming section, the reformed gas can be efficiently generated.
- the protrusion of the columnar protrusion and the tip of the combustion nozzle face each other with a combustion space therebetween.
- the flame can be sufficiently grown and burned efficiently.
- a restricting portion for restricting a flame from the combustion nozzle toward the protruding end of the columnar protrusion and an opening for injecting the combustion gas from the combustion nozzle toward the peripheral direction are provided.
- the outer reforming section can be efficiently heated.
- a heat transfer member having thermal conductivity is fitted in a space between the outer reforming portion and the columnar protruding portion so as to allow ventilation.
- the combustion heat of the exhaust gas flow passes through the heat transfer member to the outer reforming part and the columnar reforming part inside the columnar protrusion while passing through the gap, so that the reforming can be performed more efficiently.
- an evaporator can be incorporated into the disclosed fuel reformer.
- the fuel pipe further includes a water guide pipe through which water flows out from the tip part, and an evaporating part for generating water vapor is formed by inserting the tip part of the water guide pipe into the internal space of the columnar protrusion, and the fuel gas An introduction pipe is connected to the gas flow gap on the second end side.
- This fuel reformer eliminates the need for a separate evaporator. Therefore, the structure can be further simplified.
- the fuel cell equipped with these fuel reformers can improve the utilization efficiency of combustion heat.
- combustion heat can be supplied to a large amount of reforming catalyst in a well-balanced manner, so that reformed gas can be generated efficiently.
- FIG. 5 is a schematic sectional view taken along line XX in FIG. 4. It is the schematic which shows the structure of the fuel cell of a modification. It is a schematic sectional drawing of the fuel reformer of a modification.
- FIG. 2 shows the configuration of the fuel cell 1 of the present embodiment.
- the fuel cell 1 is a flat solid oxide fuel cell 1. Except for the fuel reformer 20, the basic configuration of the fuel cell 1 is not much different from the fuel cell 101 described above.
- the fuel cell 1 is provided with an evaporator 2, an air preheater 3, a fuel reformer 20, a cell stack 4 and the like, and uses a fuel gas such as city gas, water and air, and the cell stack 4
- a fuel gas such as city gas, water and air
- the electromotive force is taken out from the power to generate electricity.
- the evaporator 2 heats water and generates water vapor.
- the generated water vapor is mixed with fuel gas that has been subjected to treatment such as desulfurization, and is sent to the fuel reformer 20 through the fuel gas introduction pipe 10. Therefore, the fuel gas introduced into the fuel reformer 20 in this embodiment contains water vapor.
- the fuel reformer 20 is provided with a reforming catalyst that functions at a high temperature, and the catalytic action reforms the fuel gas into a high-temperature reforming gas mainly composed of hydrogen.
- the generated reformed gas is sent to the cell stack 4 through the reformed gas outlet pipe 11.
- the air preheater 3 heats the outside air and generates high-temperature air (heated air).
- the generated heated air is introduced into the cell stack 4 through the air introduction pipe 12.
- the high temperature reformed gas an anode outflow gas (anode offgas), an example of combustion gas
- the high temperature air cathode outflow gas (cathode offgas)
- cathode side exhaust pipe 14 The high temperature air (cathode outflow gas (cathode offgas)) that has been altered in the cell stack 4 is sent to the fuel reformer 20 through the cathode side exhaust pipe 14.
- the anode outflow gas contains surplus hydrogen, when the anode outflow gas is mixed with the cathode outflow gas, it ignites and burns.
- the exhaust gas generated in the fuel reformer 20 is sent to the air preheater 3 through the exhaust pipe 15 and heated after the air is exhausted.
- FIG. 3 shows the external appearance of the main part of the fuel reformer 20.
- the fuel reformer 20 has a columnar main body 21 whose appearance is vertically long.
- the fuel gas introduction pipe 10 is connected to the approximate center of the upper end surface of the main body 21.
- the exhaust pipe 15 is connected to the peripheral portion of the upper end surface of the main body portion 21.
- the reformed gas outlet tube 11, the anode side discharge tube 13, and the cathode side discharge tube 14 are connected to the lower side surface of the main body 21 away from each other.
- the fuel reformer 20 is made of a heat resistant material.
- FIG. 4 shows the inside of the fuel reformer 20.
- the main body 21 generally has a double structure composed of a thermally conductive inner cylinder 22 and an outer cylinder 23 that is slightly larger than the inner cylinder 22.
- a combustion chamber 24 extending in a cylindrical shape along the central axis J is formed inside the inner cylindrical body 22 between a lower end 24a (first end) and an upper end 24b (second end).
- a combustion nozzle 30, a columnar protrusion 40, a heat transfer member 50, and the like are arranged in the combustion chamber 24 .
- the dots represent the reforming catalyst, and the mesh represents the heat transfer member 50.
- the outer cylinder body 23 has a cylindrical outer side wall portion 23a, an outer upper end wall portion 23b that closes the upper end of the outer side wall portion 23a, and an outer lower end wall portion 23c that closes the lower end of the outer side wall portion 23a.
- 21 outer shells are formed.
- the inner cylindrical body 22 has a cylindrical inner side wall portion 22a, an inner upper end wall portion 22b that closes the upper end of the inner side wall portion 22a, and an inner lower end wall portion 22c that closes the lower end of the inner side wall portion 22a.
- 24 outer shells are formed.
- the inner side wall part 22a is formed to have a smaller diameter than the outer side wall part 23a, and the inner side wall part 22a and the outer side wall part 23a are arranged concentrically inside and outside with the central axis J as a center. Accordingly, a cylindrical gap (cylindrical gap 25a) is formed between the inner side wall portion 22a and the outer side wall portion 23a.
- the inner side wall portion 22a is formed to be shorter in the axial direction than the outer side wall portion 23a, and between the outer upper end wall portion 23b and the inner upper end wall portion 22b, and between the outer lower end wall portion 23c and the inner lower end wall portion.
- a space is also formed between the space 22c (upper space 25b and lower space 25c).
- the cylindrical gap 25a, the upper gap 25b, and the lower gap 25c communicate with each other to form a gas flow gap 25 along the outer shell of the combustion chamber 24.
- the cylindrical void 25a located around the combustion chamber 24 is filled with a reforming catalyst, and an outer reforming portion 43 having a cylindrical shape is formed.
- the exhaust pipe 15 penetrates through the upper gap 25 b of the gas circulation gap 25 and protrudes into the combustion chamber 24.
- the tip of the exhaust pipe 15 opens at the upper corner of the combustion chamber 24.
- the reformed gas outlet pipe 11 is connected to the lower portion of the outer cylinder 23 and communicates with the lower gap 25c.
- the fuel gas introduction pipe 10 is connected to the upper part of the outer cylinder 23 and is connected to communicate with the gas flow gap 25 at a position separating the reformed gas outlet pipe 11 and the outer reforming part 43 (details). Will be described later).
- the anode side discharge pipe 13 passes through the cylindrical gap 25 a of the gas circulation gap 25 and protrudes into the combustion chamber 24, and is connected to the combustion nozzle 30.
- the combustion nozzle 30 is disposed on the lower end side of the central portion of the combustion chamber 24 and extends upward.
- the anode side exhaust pipe 13 is connected to the lower end of the combustion nozzle 30.
- the combustion nozzle 30 has a circular tube shape.
- the front end portion 30 a of the combustion nozzle 30 is closed, and a plurality of injection holes 31 are formed radially on the side surface portion of the combustion nozzle 30. Therefore, the hot anode effluent gas is sent to the combustion nozzle 30 through the anode side exhaust pipe 13 and is injected radially from the respective injection holes 31 toward the periphery of the combustion nozzle 30.
- the tip portion 30a of the combustion nozzle 30 may have some holes. That is, a restricting portion (in this case, the tip portion 30a of the closed combustion nozzle 30 corresponds) that prevents the combustion nozzle 30 from going to the columnar protrusion 40, and combustion gas is injected from the combustion nozzle 30 toward the periphery thereof. It is only necessary to have an opening (in this case, the injection hole 31 corresponds).
- a member constituting the restriction portion and the opening portion with respect to the combustion nozzle 30 may be disposed in the combustion chamber 24.
- the cathode side discharge pipe 14 penetrates through the cylindrical gap 25 a of the gas circulation gap 25 and protrudes into the combustion chamber 24.
- the tip of the cathode side exhaust pipe 14 is open near the lower end of the combustion nozzle 30. Accordingly, the high temperature cathode outflow gas is sent to the lower end portion of the combustion chamber 24 through the cathode side exhaust pipe 14 and ascends the combustion chamber 24.
- the cathode effluent gas and the injected anode effluent gas are combined and ignited, and a flame directed toward the outer reforming portion 43 is generated around the combustion nozzle 30. Thereby, the lower part of the outer reforming unit 43 can be efficiently heated.
- the flame rises while growing and concentrates in the center of the combustion chamber 24. Therefore, the grown flame gathers above the combustion nozzle 30 and becomes high temperature.
- the peripheral portion that is, the middle portion of the outer reforming portion 43 to the upper portion thereof, is difficult to transmit the combustion heat and tends to be inefficient in heating. Therefore, in the fuel reformer 20, the columnar protrusion 40 is provided so that the combustion heat is easily transmitted from the middle of the outer reforming portion 43 to the portion above it.
- a columnar protrusion 40 is provided on the upper part of the combustion chamber 24 concentrically with an outer reforming part 43 defined by the inner side wall part 22a and a cylindrical gap.
- the columnar protruding portion 40 protrudes downward from the upper end side toward the combustion nozzle 30, and the disk-shaped protruding end surface faces the tip of the combustion nozzle 30 with the combustion space 41 therebetween.
- the combustion space 41 Since the combustion space 41 is secured above the combustion nozzle 30, the flame can be sufficiently grown. Then, the exhaust gas flow rising at a high temperature in the combustion space 41 collides with the protruding end surface of the columnar protrusion 40, and expands in a cylindrical shape from the middle of the outer reforming portion 43 along the upper portion (exhaust gas flow). Into the channel 42).
- a columnar reforming portion 46 is provided in the columnar protruding portion 40 so that reforming can be performed more efficiently.
- the columnar protrusion 40 has a bottomed cylindrical partition wall 44 that constitutes the outer shell of the columnar protrusion 40.
- the partition wall portion 44 is made of a heat conductive material, and is integrally attached to the inner surface of the inner upper end wall portion 22b.
- the upper opening of the partition wall portion 44 is closed by the inner upper end wall portion 22b.
- a ventilation opening 45 is opened in the peripheral part of the inner upper end wall part 22b facing the inner side of the partition part 44 (see FIG. 5).
- the interior of the partition wall portion 44 communicates with the upper gap 25 b through the ventilation opening 45.
- an outflow prevention member such as a metal mesh or a non-woven fabric is disposed at the boundary between the columnar protrusion 40 and the outer reforming portion 43. Thereby, the reforming catalyst filled in the columnar protrusion 40 is prevented from moving toward the cylindrical reforming portion 43 due to gas flow.
- the inside of the partition wall 44 is filled with the reforming catalyst without any trouble. Thereby, a columnar reforming portion 46 having a cylindrical shape is formed inside the partition wall portion 44.
- the fuel gas introduction pipe 10 extends through the upper gap 25 b into the columnar protrusion 40 and is inserted into the columnar reforming section 46.
- An introduction port 10a through which the fuel gas flows out is provided at the tip of the fuel gas introduction pipe 10 and is disposed at the projecting end portion of the columnar projecting portion 40 while being covered with the reforming catalyst, and opens downward.
- the fuel gas introduced into the fuel reformer 20 through the fuel gas introduction pipe 10 is discharged to the columnar reforming section 46 from the introduction port 10a.
- the introduction port 10a is located at the protruding end portion of the columnar protruding portion 40 where the high-temperature exhaust gas flow collides, and is opened downward while being buried in the reforming catalyst, so that the combustion heat is most easily transmitted and immediately after the introduction of the fuel gas. Is most easily modified. Therefore, it can be reformed efficiently.
- the partially reformed fuel gas is homogenized in the upper gap 25b, then enters the cylindrical gap 25a, and flows toward the lower gap 25c while being further reformed in the outer reforming portion 43.
- the reformed gas generated by reforming the fuel gas as a whole is led out from the reformed gas outlet pipe 11 through the lower gap 25c.
- the reformed gas can be efficiently generated.
- a heat transfer member 50 is arranged so that reforming can be performed more efficiently.
- the heat transfer member 50 is made of a material having excellent thermal conductivity, and can be vented to the exhaust gas passage 42 between the outer reforming portion 43 and the columnar protrusion 40. It is inserted in.
- the heat transfer member 50 is a cylindrical member that is folded in the circumferential direction, and the exhaust gas flow is in contact with both the outer reforming portion 43 and the columnar protrusion 40 via the inner side wall portion 22a. It is fitted in the path 42. Therefore, since the combustion heat of the exhaust gas flow passes through the heat transfer member 50 to the outer reforming portion 43 and the columnar reforming portion 46 inside the columnar protrusion 40 while passing through the gap, the reforming is improved more efficiently. You can quality.
- the protruding end portion of the columnar protrusion 40 protrudes from the heat transfer member 50 and is arranged so that the lower side of the exhaust gas passage 42 is exposed from the heat transfer member 50.
- projection means that a space in which the heat transfer member 50 is not fitted is formed between the outer peripheral portion in the vicinity of the protrusion of the columnar protrusion 40 and the inner wall of the combustion chamber 24.
- the protruding end portion of the columnar protrusion 40 is exposed from the end surface (lower end 24a side) and protrudes toward the lower end 24a.
- the exhaust gas flow colliding with the protruding end portion of the columnar protrusion 40 can be smoothly guided to the exhaust gas flow path 42, and combustion is performed in a well-balanced manner over the entire circumference of the columnar reforming portion 46, the outer reforming portion 43, and the heat transfer member 50. Can convey heat. Moreover, since the combustion heat of the exhaust gas flow is taken away by the columnar protrusions 40, it is possible to prevent excessive heat of combustion from being applied to the heat transfer member 50, and to suppress deterioration of the heat transfer member 50.
- FIG. 6 shows the configuration of a modified fuel cell 1 ′.
- This fuel cell 1 ′ is different from the previous fuel cell 1 in that the function of the evaporator 2 is incorporated in the fuel reformer 20 ′, and the fuel reformer 20 ′ includes a fuel that does not contain water vapor. Gas (non-hydrous fuel gas) is directly supplied.
- FIG. 7 shows the fuel reformer 20 '.
- the basic structure of the fuel reformer 20 ′ is the same as that of the previous fuel reformer 20.
- the description is abbreviate
- the inside of the partition wall 44 constituting the columnar protrusion 40 is hollow, and a water conduit 60 through which water flows out from the tip is inserted.
- the water conduit 60 extends through the upper gap 25 b into the columnar protrusion 40, and the water inlet 60 a through which water flows out is disposed inside the columnar protrusion 40. Accordingly, the water introduced into the fuel reformer 20 ′ through the water conduit 60 is discharged from the water inlet 60 a into the partition wall 44.
- the partition wall 44 may be filled with stainless wool or the like so that water is dispersed.
- the water flowing out from the water inlet 60a immediately absorbs heat and vaporizes into water vapor. That is, the inside of the partition 44 functions as an evaporation unit 61 that generates water vapor. Also in this case, the combustion heat is absorbed as the heat of vaporization, so that excessive heating of the partition wall 44 can be suppressed.
- the generated water vapor flows into the upper gap 25b through the ventilation opening 45.
- a fuel gas introduction pipe 10 for introducing non-hydrous fuel gas is connected to the upper gap 25b. Accordingly, the fuel gas is mixed with the water vapor in the upper gap 25b.
- Fuel gas containing water vapor enters the cylindrical gap 25a and flows toward the lower gap 25c while being reformed by the outer reforming portion 43. Thus, the generated reformed gas is led out from the reformed gas outlet pipe 11 through the lower gap 25c.
- the installation direction of the fuel reformer can be appropriately changed according to the specifications. For example, it may be installed upside down or horizontally, or may be installed obliquely.
- the reforming catalyst may be filled in the upper gap 25b and the lower gap 25c of the gas circulation gap 25 as well.
- the configuration of the heat transfer member 50 can be selected as appropriate. For example, it may be fibrous or porous.
- Fuel gas and water vapor may be separately supplied to the fuel reformer and mixed inside the columnar protrusion 40.
- the lower gap 25c may be omitted. That is, the inner lower end wall portion 22c of the inner cylindrical body 22 is omitted, the cylindrical inner side wall portion 22a is extended downward and joined to the outer lower end wall portion 23c, and the lower end of the inner side wall portion 22a is connected to the outer lower end wall portion 23c. You may make it close.
- Fuel cell 10 Fuel gas introduction pipe 11 Reformed gas outlet pipe 12 Air introduction pipe 13 Anode side exhaust pipe 14 Cathode side exhaust pipe 15 Exhaust pipe 20, 20 ′ Fuel reformer 21 Body 22 Inner cylinder 23 Outer cylinder 24 Combustion chamber 24a Lower end (first end) 24b Upper end (second end) 25 Gas flow gap 30 Combustion nozzle 31 Injection hole 40 Columnar protrusion 41 Combustion space 43 Outer reforming portion 46 Columnar reforming portion 50 Heat transfer member
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Abstract
Description
図2に、本実施形態の燃料電池1の構成を示す。この燃料電池1は、平板型の固体酸化物形燃料電池1である。燃料改質器20を除けば、燃料電池1の基本的な構成は、上述した燃料電池101と大差は無い。
この燃料電池1では、バーナーと改質器とが燃料改質器20に一体に組み込まれ、構造が簡素化されていて、効率的な改質が行えるように工夫されている。
図6に、変形例の燃料電池1’の構成を示す。この燃料電池1’では、燃料改質器20’に蒸発器2の機能が組み込まれている点で先の燃料電池1と異なっており、燃料改質器20’には、水蒸気を含まない燃料ガス(無加水燃料ガス)が直接供給される。
燃料改質器の設置方向は仕様に応じて適宜変更できる。例えば、上下逆向きや横置きしてもよく、斜めに設置してもよい。ガス流通空隙25の上部空隙25b及び下部空隙25cにも改質触媒が充填されていてもよい。伝熱部材50の構成は適宜選択できる。例えば、繊維状であってもよいし、多孔質状であってもよい。
10 燃料ガス導入管
11 改質ガス導出管
12 空気導入管
13 アノード側排出管
14 カソード側排出管
15 排気管
20、20’ 燃料改質器
21 本体部
22 内筒体
23 外筒体
24 燃焼室
24a 下端(第1端)
24b 上端(第2端)
25 ガス流通空隙
30 燃焼ノズル
31 噴射孔
40 柱状突出部
41 燃焼空間
43 外側改質部
46 柱状改質部
50 伝熱部材
Claims (8)
- 触媒作用により、燃料ガスを用いて改質ガスを生成する燃料改質器であって、
第1端と第2端との間を筒状に延びる燃焼室を内部に有する本体部と、
前記燃焼室の第1端側に配置され、燃焼ガスの噴射によって火炎を生じる燃焼ノズルと、
第2端側に配置され、当該燃焼室で生じる排気ガスを排出する排気管と、
前記燃焼室の内部と隔絶された状態で当該燃焼室の外殻に沿って設けられたガス流通空隙と、
前記ガス流通空隙に改質触媒を充填して形成された外側改質部と、
前記外側改質部の上流側に位置し、前記ガス流通空隙に燃料ガスを導入する燃料ガス導入管と、
前記外側改質部の下流側に位置し、前記ガス流通空隙から改質ガスを導出する改質ガス導出管と、
を備え、
前記燃焼室の内部にあって、当該燃焼室と隔絶された内部空間を有するとともに前記燃料ガス導入管と前記ガス流通空隙とに連通するように、前記外側改質部と空隙を隔てて設けられ、第2端側から前記燃焼ノズルに向かって突出する柱状突出部が設けられている燃料改質器。 - 請求項1に記載の燃料改質器において、
前記柱状突出部の内部空間に改質触媒を充填することにより、柱状改質部が形成されている燃料改質器。 - 請求項1又は請求項2に記載の燃料改質器において、
前記燃料ガス導入管が、前記柱状突出部の内部空間に差し込まれ、燃料ガスを流出させる先端部が、改質触媒に覆われた状態で前記柱状突出部の突出部分に配置されている燃料改質器。 - 請求項1~請求項3のいずれか一つに記載の燃料改質器において、
前記柱状突出部の突端と、前記燃焼ノズルの先端とが、燃焼空間を隔てて対向している燃料改質器。 - 請求項4に記載の燃料改質器において、
前記燃焼ノズルから前記柱状突出部の突端方向に向かう火炎を規制する規制部と、
前記燃焼ノズルから該周囲方向に向けて前記燃焼ガスを噴射するための開口部と、
を備える燃料改質器。 - 請求項1~請求項5のいずれか一つに記載の燃料改質器において、
前記外側改質部と前記柱状突出部との間の空隙に、熱伝導性を有する伝熱部材が、通気可能な状態で嵌め込まれている燃料改質器。 - 請求項1に記載の燃料改質器において、
先端部から水が流出する導水管を更に備え、
前記導水管の先端部を前記柱状突出部の内部空間に差し込むことにより、水蒸気を発生する蒸発部が形成され、前記燃料ガス導入管が第2端側で前記ガス流通空隙に接続されている燃料改質器。 - 燃料電池であって、
請求項1~請求項7のいずれか一つに記載の燃料改質器を備え、
発電セルを有し、
前記発電セルに、前記燃料改質器で生成されるガスが供給される燃料電池。
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US14/772,746 US9738519B2 (en) | 2013-03-25 | 2014-03-11 | Fuel reformer and fuel cell |
EP14775534.2A EP2955153B1 (en) | 2013-03-25 | 2014-03-11 | Fuel reformer and fuel cell |
CN201480014332.3A CN105189345B (zh) | 2013-03-25 | 2014-03-11 | 燃料改性器及燃料电池 |
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JP6814970B2 (ja) | 2016-05-19 | 2021-01-20 | パナソニックIpマネジメント株式会社 | 高温動作型燃料電池システム |
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US11456473B2 (en) * | 2016-06-16 | 2022-09-27 | Kyocera Corporation | Reformer, cell stack apparatus, fuel cell module, and fuel cell apparatus |
JP6443404B2 (ja) | 2016-07-04 | 2018-12-26 | トヨタ自動車株式会社 | 熱、水素生成装置 |
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US9738519B2 (en) | 2017-08-22 |
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US20160023899A1 (en) | 2016-01-28 |
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