CN117383515A - Reformer and fuel cell - Google Patents
Reformer and fuel cell Download PDFInfo
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- CN117383515A CN117383515A CN202311410209.0A CN202311410209A CN117383515A CN 117383515 A CN117383515 A CN 117383515A CN 202311410209 A CN202311410209 A CN 202311410209A CN 117383515 A CN117383515 A CN 117383515A
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- heat exchange
- chamber
- gas
- reforming
- cavity
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- 239000000446 fuel Substances 0.000 title claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 128
- 238000002407 reforming Methods 0.000 claims abstract description 101
- 239000002737 fuel gas Substances 0.000 claims abstract description 68
- 230000007704 transition Effects 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 19
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 239000004020 conductor Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000376 reactant Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000001833 catalytic reforming Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 biogas Chemical compound 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C01B2203/02—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
-
- 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
- C01B2203/06—Integration with other chemical processes
- C01B2203/066—Integration with other chemical processes with fuel cells
- C01B2203/067—Integration with other chemical processes with fuel cells the reforming process taking place in the fuel cell
-
- 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
- C01B2203/0833—Heating by indirect heat exchange with hot fluids, other than combustion gases, product gases or non-combustive exothermic reaction product gases
-
- 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
Abstract
The invention belongs to the technical field of fuel cells, and discloses a reformer and a fuel cell, wherein the reformer comprises a reforming unit, the reforming unit is provided with an inner cavity, a partition plate divides the inner cavity into a fuel gas cavity and a heat exchange air cavity, the heat exchange air cavity is used for heat exchange gas to enter, the partition plate is made of heat conducting materials, the reforming unit is provided with a first end and a second end along a first direction, the fuel gas cavity comprises a first transition cavity, a reforming cavity positioned at one side of the first partition strip and a fuel gas heat exchange cavity positioned at the other side of the first partition strip, the reforming cavity and the fuel gas heat exchange cavity are communicated only through the first transition cavity, the reforming cavity is provided with a fuel gas inlet, the fuel gas heat exchange cavity is provided with a fuel gas outlet, a catalyst for reforming fuel gas is arranged in the reforming cavity, the first transition cavity is positioned at the first end, and the fuel gas inlet and the fuel gas outlet are both positioned at the second end, and the same size or specification of the reformer can increase the path length of a fuel gas flow channel, so that the heat exchange effect of fuel gas is improved.
Description
Technical Field
The present invention relates to the technical field of fuel cells, and in particular, to a reformer and a fuel cell.
Background
In the solid oxide fuel cell system, hydrocarbon gases such as methane, biogas, methanol, ethanol and the like can be used as fuel of the fuel cell except for the conventional hydrogen, however, other hydrocarbon fuels except for the hydrogen and the carbon monoxide are subjected to catalytic reforming before being supplied to the electric pile.
In a reformer in which fuel gas is heated and catalyzed, for example, a reformer provided with a gas flow passage for the fuel gas to pass therethrough and a heat supply passage for the high temperature flue gas of a solid oxide fuel cell, the fuel gas is reformed in the gas flow passage and heated by the high temperature flue gas is provided in the related art. However, there are problems in that the reformer is not excessively large in size due to the installation space of the fuel cell system, and thus the flow path of the fuel gas is generally short, which easily results in incomplete heat exchange and uneven heat exchange.
Disclosure of Invention
According to one aspect of the present invention, the present invention provides a reformer to solve the problems of incomplete heat exchange and uneven heat exchange caused by the generally short gas flow path of the fuel gas in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a reformer for reforming a fuel gas in the fuel cell; the reforming device comprises a reforming unit, a first separator and a second separator, wherein the reforming unit is provided with an inner cavity, the first separator is arranged in the inner cavity, the inner cavity is divided into a gas cavity and a heat exchange gas cavity by the separator, the heat exchange gas cavity is used for heat exchange gas to enter, the separator is made of a heat conducting material, and the reforming unit is provided with a first end and a second end along a first direction;
the gas chamber includes first transition chamber, is located reforming chamber and being located of first dividing strip one side first dividing strip opposite side gas heat transfer chamber, reforming chamber with gas heat transfer chamber is only passed through first transition chamber intercommunication, reforming chamber has the gas entry, gas heat transfer chamber has the gas export, be provided with the catalyst that is used for reformed gas in the reforming chamber, first transition chamber is located first end, gas entry and gas export all are located the second end.
As the preferred scheme of reformer, the reforming unit still includes the second parting bead, the heat transfer air cavity includes second transition chamber, is located the first heat transfer chamber of second parting bead one side and be located the second heat transfer chamber of second parting bead opposite side, the reforming chamber just is just to first heat transfer chamber setting, the gas heat transfer chamber just is just to second heat transfer chamber setting, first heat transfer chamber and second heat transfer chamber only pass through the second transition chamber intercommunication, first heat transfer chamber has the heat transfer gas entry, the second heat transfer chamber has the heat transfer gas export, the second transition chamber is located the second end, heat transfer gas entry and the heat transfer gas export all are located first end.
As the preferable scheme of the reformer, the heat exchange gas entering and exiting the heat exchange air cavity is air, and the heat exchange air cavity is communicated with an air inlet of the electric pile.
As the preferred scheme of reformer, still including set up in the first fin of reforming chamber and set up in the second fin of gas heat transfer chamber, first fin will the reforming chamber is divided into a plurality of reforming runner, and a plurality of the extending direction of reforming runner all is on a parallel with first direction, the second fin will gas heat transfer chamber is divided into a plurality of gas heat transfer runner, and a plurality of the extending direction of gas heat transfer runner all is on a parallel with first direction, first fin with the second fin all with the baffle contacts, and is made by the heat conduction material.
As a preferable scheme of the reformer, the section of the reforming flow channel is rectangular, isosceles trapezoid or omega-shaped; the section of the fuel gas heat exchange flow channel is rectangular, isosceles trapezoid or omega-shaped.
As a preferable mode of the reformer, the width of the reforming chamber in the second direction is larger than the width of the gas heat exchange chamber in the second direction, the second direction is parallel to the partition plate, and the second direction is perpendicular to the first direction.
As a preferable mode of the reformer, a plurality of reforming units are provided, and a plurality of reforming units are stacked in sequence.
As the preferred scheme of reformer, one side that first transition chamber kept away from first separate strip has consecutive first lateral wall, second lateral wall and third lateral wall, first lateral wall with the lateral wall in reforming chamber is connected, the third lateral wall with the lateral wall in gas heat transfer chamber is connected, the second lateral wall is the arc.
According to another aspect of the present invention, there is provided a fuel cell comprising the above-described reformer, and further comprising a stack, a fuel gas outlet of the reformer being in communication with a reactant gas inlet of the stack.
As the preferable scheme of the fuel cell, the heat exchange gas entering and exiting the heat exchange air cavity is air, the heat exchange air cavity is communicated with the air inlet of the electric pile, and the fuel cell further comprises an air preheater which is positioned at the upstream of the reformer along the circulation direction of the air and is used for heating the air.
The beneficial effects of the invention are as follows:
the invention provides a reformer for reforming fuel gas in a fuel cell, which comprises a reforming unit, wherein the reforming unit is provided with an inner cavity and comprises a baffle plate and a first separation strip, the baffle plate is arranged in the inner cavity and divides the inner cavity into a fuel gas cavity and a heat exchange air cavity, the heat exchange air cavity is used for allowing heat exchange gas to enter, the baffle plate is made of heat conducting materials, the reforming unit is provided with a first end and a second end along a first direction, the fuel gas cavity comprises a first transition cavity, a reforming cavity positioned at one side of the first separation strip and a fuel gas heat exchange cavity positioned at the other side of the first separation strip, the reforming cavity and the fuel gas heat exchange cavity are communicated only through the first transition cavity, the reforming cavity is provided with a fuel gas inlet, the fuel gas heat exchange cavity is provided with a fuel gas outlet, a catalyst for reforming fuel gas is arranged in the reforming cavity, the first transition cavity is positioned at the first end, the fuel gas inlet and the fuel gas outlet are both positioned at the second end, so that fuel gas enters from the fuel gas inlet positioned at the second end, reforming cavity is reformed through the catalyst, and is heated by the heat exchange gas at the same time, and then the fuel gas is heated through the first transition cavity. By the arrangement, the path length of the fuel gas flow channel can be increased for reformers with the same size or specification, so that the heat exchange effect of fuel gas is improved.
The invention also provides a fuel cell which comprises the reformer, wherein the reformer can increase the path length of a fuel gas flow channel so as to improve the heat exchange effect of fuel gas.
Drawings
FIG. 1 is a schematic view of the overall structure of a reformer in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a portion of a reformer in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a portion of a reformer according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a portion of a reformer in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a first fin according to an embodiment of the present invention;
FIG. 6 is a schematic view of another first fin according to an embodiment of the present invention;
FIG. 7 is a schematic view of a first fin according to another embodiment of the present invention.
In the figure:
1. a reforming unit; 2. a partition plate; 3. a first separator bar; 4. a second division bar; 5. a first fin; 6. a second fin;
100. an inner cavity;
110. a gas cavity; 111. a reforming chamber; 112. a first transition chamber; 113. a gas heat exchange cavity;
120. a heat exchange air cavity; 121. a first heat exchange chamber; 122. a second transition chamber; 123. and a second heat exchange cavity.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
In the solid oxide fuel cell system, hydrocarbon fuel is subjected to catalytic reforming before being supplied to the stack, and in the reformer, fuel gas is heated and catalyzed, for example, a reformer is provided in the related art, which is provided with a gas flow passage for passing fuel gas and a heat supply passage for passing high-temperature flue gas of the solid oxide fuel cell, and the fuel gas is reformed in the gas flow passage and heated by the high-temperature flue gas. However, there are problems in that the reformer is not excessively large in size due to the installation space of the fuel cell system, and thus the flow path of the fuel gas is generally short, which easily results in incomplete heat exchange and uneven heat exchange.
In view of the above problems, the present embodiment provides a reformer to solve the problems in the prior art that the gas flow channel of the fuel gas is generally short, incomplete heat exchange is easily caused, and the heat exchange is not uniform.
Referring to fig. 1-4, a reformer is used to reform the fuel gas in a fuel cell, in this embodiment the reformer is used in particular for a solid oxide fuel cell, but in other embodiments it may be used for other types of fuel cells as well. The reformer includes a reforming unit 1, the reforming unit 1 having an inner cavity 100, and including a partition plate 2 and a first division bar 3 provided in the inner cavity 100, the partition plate 2 dividing the inner cavity 100 into a gas cavity 110 and a heat exchange air cavity 120, the heat exchange air cavity 120 being used for heat exchange gas to enter, the partition plate 2 being made of a heat conductive material, so that the gas at the gas cavity 110 can exchange heat with the heat exchange gas at the heat exchange air cavity 120 through the partition plate 2. The reforming unit 1 has a first end and a second end in a first direction; the gas cavity 110 comprises a first transition cavity 112, a reforming cavity 111 positioned at one side of the first dividing strip 3 and a gas heat exchange cavity 113 positioned at the other side of the first dividing strip 3, wherein the reforming cavity 111 and the gas heat exchange cavity 113 are communicated only through the first transition cavity 112, the reforming cavity 111 is provided with a gas inlet, the gas heat exchange cavity 113 is provided with a gas outlet, a catalyst for reforming gas is arranged in the reforming cavity 111, the first transition cavity 112 is positioned at a first end, the gas inlet and the gas outlet are both positioned at a second end, and the gas inlet and the gas outlet can be divided through the first dividing strip 3. So that the fuel gas enters through the fuel gas inlet at the second end and is reformed by the catalyst in the reforming chamber 111 while being heated by the heat exchange gas, and then enters the fuel gas heat exchange chamber 113 through the first transition chamber 112, and is further heated by the heat exchange gas. By the arrangement, the path length of the fuel gas flow channel can be increased for reformers with the same size or specification, so that the heat exchange effect of fuel gas is improved.
With continued reference to fig. 1-4, the reforming unit 1 further includes a second partition bar 4, and the heat exchange air chamber 120 includes a second transition chamber 122, a first heat exchange chamber 121 located at one side of the second partition bar 4, and a second heat exchange chamber 123 located at the other side of the second partition bar 4, where the reforming chamber 111 is disposed opposite to the first heat exchange chamber 121, and the gas heat exchange chamber 113 is disposed opposite to the second heat exchange chamber 123, so that the gas located in the reforming chamber 111 can exchange heat with the heat exchange gas located in the first heat exchange chamber 121, and the gas located in the gas heat exchange chamber 113 can exchange heat with the heat exchange gas located in the second heat exchange chamber 123. The first heat exchange cavity 121 and the second heat exchange cavity 123 are only communicated through the second transition cavity 122, the first heat exchange cavity 121 is provided with a heat exchange gas inlet, the second heat exchange cavity 123 is provided with a heat exchange gas outlet, the second transition cavity 122 is positioned at the second end, and the heat exchange gas inlet and the heat exchange gas outlet are both positioned at the first end. So arranged, the heat exchange gas enters the first heat exchange chamber 121 from the heat exchange gas inlet at the first end and exchanges heat with the fuel gas at the reforming chamber 111, and in addition, the heat exchange gas enters the second heat exchange chamber 123 through the second transition chamber 122 and exchanges heat with the fuel gas at the fuel gas heat exchange chamber 113. In addition, the flowing direction of the heat exchange gas is opposite to that of the fuel gas, so that the fuel gas is uniformly heated, and the temperature difference is small.
Alternatively, the first dividing strip 3 and the second dividing strip 4 are arranged opposite to each other, the first dividing strip 3 and the second dividing strip 4 extend along the first direction, and the first dividing strip 3 and the second dividing strip 4 are made of heat insulation materials and do not participate in heat conduction, so that the fuel gas in the reforming cavity 111 can only exchange heat with the heat exchange gas in the first heat exchange cavity 121, and the fuel gas in the fuel gas heat exchange cavity 113 can only exchange heat with the heat exchange gas in the second heat exchange cavity 123.
With continued reference to fig. 1-4, in some embodiments, the heat exchange gas entering and exiting the heat exchange air chamber 120 is high temperature flue gas exhausted from the fuel cell, but this solution has the problem that an exhaust line for high temperature flue gas exhaust needs to be provided between the reformer and the stack of the fuel cell, and an intake line for air intake needs to be provided, resulting in a complex overall structure of the fuel cell. In this embodiment, the heat exchange gas flowing into and out of the heat exchange air cavity 120 is air, and the heat exchange air cavity 120 is communicated with the air inlet of the electric pile, so that the air discharged through the reformer can directly enter the electric pile to participate in the reaction as the oxidizing gas, and the structure is simple.
With continued reference to fig. 1-4, the reformer further includes a first fin 5 disposed in the reforming chamber 111 and a second fin 6 disposed in the gas heat exchange chamber 113, the first fin 5 dividing the reforming chamber 111 into a plurality of reforming channels, and extending directions of the plurality of reforming channels are all parallel to the first direction, the second fin 6 dividing the gas heat exchange chamber 113 into a plurality of gas heat exchange channels, and extending directions of the plurality of gas heat exchange channels are all parallel to the first direction, and the first fin 5 and the second fin 6 are both in contact with the separator 2 and are all made of a heat conductive material. Through setting up first fin 5 and second fin 6, can separate reforming chamber 111 and gas heat transfer chamber 113 into a plurality of runners, the gas velocity of flow in every runner is the same, and first fin 5 and second fin 6 are made by the heat conduction material, and all contact with baffle 2, and accessible baffle 2 is with heat transfer to first fin 5 and second fin 6 to accomplish the heat transfer with the gas by first fin 5 and second fin 6, can increase the heat transfer area.
Similarly, the reformer further includes a third fin disposed in the first heat exchange chamber 121 and a fourth fin disposed in the second heat exchange chamber 123, the third fin dividing the first heat exchange chamber 121 into a plurality of first heat exchange channels, and the extending directions of the plurality of first heat exchange channels are all parallel to the first direction, the fourth fin dividing the second heat exchange chamber 123 into a plurality of second heat exchange channels, and the extending directions of the plurality of second heat exchange channels are all parallel to the first direction, and the third fin and the fourth fin are all in contact with the separator 2 and are all made of a heat conductive material, which has similar technical effects as the first fin 5 and the second fin 6.
The section of the reforming flow channel is rectangular, isosceles trapezoid or omega-shaped; the section of the gas heat exchange flow channel is rectangular, isosceles trapezoid or omega-shaped. Taking the first fin 5 as an example, fig. 5 shows a structure in which the cross section of the reforming flow path is rectangular, fig. 6 shows a structure in which the cross section of the reforming flow path is isosceles trapezoid, and fig. 7 shows a structure in which the cross section of the reforming flow path is omega-shaped, and a user can select a suitable first fin 5 according to actual needs. In this embodiment, the cross section of the reforming flow channel is rectangular, and the width of the gas heat exchange flow channel along the second direction is greater than the width of the reforming flow channel along the second direction, wherein the second direction is parallel to the separator 2, and the second direction is perpendicular to the first direction, the first direction is the AB direction in fig. 1-4, the second direction is the CD direction in fig. 1-4, and the vertical direction is the EF direction in fig. 1-4.
Since the side wall of the reforming flow path needs to be provided with a catalyst for reforming the fuel gas, in order to increase the amount of the catalyst in the reforming chamber 111, the width of the reforming chamber 111 in the second direction is greater than the width of the fuel gas heat exchange chamber 113 in the second direction, so that the volume of the reforming chamber 111 is greater than the volume of the fuel gas heat exchange chamber 113, and more catalyst is conveniently placed. In addition, the width of the gas heat exchange flow channel along the second direction is larger than that of the reforming flow channel along the second direction, so that the number of the reforming flow channels is further increased, the contact area between the gas and the first fins 5 is increased, and the catalyst can be arranged on the surface of the first fins 5, so that the contact area between the gas and the catalyst is increased.
With continued reference to fig. 1-4, the reforming unit 1 is provided with a plurality of reforming units 1, and the plurality of reforming units 1 are stacked in sequence, wherein the gas inlets of the plurality of reforming units 1 are all connected with the total gas inlet of the fuel cell, and the gas outlets of the plurality of reforming units 1 are all connected with the reactant gas inlet of the electric pile in the fuel cell. The heat exchange gas inlets of the reforming units 1 are all connected with the total heat exchange gas inlet of the fuel cell, and the heat exchange gas outlets of the reforming units 1 are all connected with the air inlet of the electric pile in the fuel cell.
With continued reference to fig. 1-4, a side of the first transition cavity 112, far away from the first separation strip 3, has a first side wall, a second side wall and a third side wall, which are sequentially connected, the first side wall is connected with a side wall of the reforming cavity 111, the third side wall is connected with a side wall of the gas heat exchange cavity 113, and the second side wall is arc-shaped, so that the first side wall and the third side wall are in smooth transition, and the gas flow is guided through the second side wall, so that the too large difference of the gas flow velocity is avoided, and in this embodiment, the overall shape of the first transition cavity 112 is in a wing shape. In addition, the second transition chamber 122 is also configured in a similar manner to guide the flow of the heat exchange gas, so as to avoid excessive flow velocity difference of the heat exchange gas.
The present embodiment also provides a fuel cell, which in the present embodiment is a solid oxide fuel cell, and in other embodiments, may be other types of fuel cells, which is not limited thereto. The fuel cell comprises the reformer, the path length of the fuel gas flow channel can be increased by the reformer, so that the heat exchange effect of fuel gas is improved, and in addition, the fuel cell further comprises a galvanic pile, and a fuel gas outlet of the reformer is communicated with a reaction gas inlet of the galvanic pile, so that reformed fuel gas is provided for the galvanic pile.
The heat exchange gas entering and exiting the heat exchange air cavity 120 is air, and the heat exchange air cavity 120 is communicated with the air inlet of the electric pile, so that high-temperature flue gas does not need to be introduced into the reformer, but the scheme needs to heat the air in advance. Specifically, the fuel cell further includes an air preheater located upstream of the reformer in the air flow direction and used for heating air, wherein the heat source used for heating air may be high-temperature flue gas, and may also be other heat sources, such as an electric heat source, and the like.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. A reformer for reforming a fuel gas in the fuel cell; the reforming unit (1) is characterized by comprising a reforming unit (1), wherein the reforming unit (1) is provided with an inner cavity (100) and comprises a partition board (2) and a first separation strip (3), the partition board (2) is arranged in the inner cavity (100), the inner cavity (100) is separated into a fuel gas cavity (110) and a heat exchange air cavity (120), the heat exchange air cavity (120) is used for heat exchange air to enter, the partition board (2) is made of a heat conducting material, and the reforming unit (1) is provided with a first end and a second end along a first direction;
the gas chamber (110) comprises a first transition chamber (112), a reforming chamber (111) arranged on one side of the first separation strip (3) and a gas heat exchange chamber (113) arranged on the other side of the first separation strip (3), wherein the reforming chamber (111) and the gas heat exchange chamber (113) are communicated only through the first transition chamber (112), the reforming chamber (111) is provided with a gas inlet, the gas heat exchange chamber (113) is provided with a gas outlet, a catalyst for reforming gas is arranged in the reforming chamber (111), the first transition chamber (112) is arranged at the first end, and the gas inlet and the gas outlet are both arranged at the second end.
2. Reformer according to claim 1, characterized in that the reforming unit (1) further comprises a second partition strip (4), the heat exchange air chamber (120) comprises a second transition chamber (122), a first heat exchange chamber (121) at one side of the second partition strip (4) and a second heat exchange chamber (123) at the other side of the second partition strip (4), the reforming chamber (111) is arranged opposite to the first heat exchange chamber (121), the gas heat exchange chamber (113) is arranged opposite to the second heat exchange chamber (123), the first heat exchange chamber (121) and the second heat exchange chamber (123) are only in communication through the second transition chamber (122), the first heat exchange chamber (121) has a heat exchange gas inlet, the second heat exchange chamber (123) has a heat exchange gas outlet, the second transition chamber (122) is at the second end, and both the heat exchange gas inlet and the heat exchange gas outlet are at the first end.
3. The reformer of claim 1, wherein the heat exchange gas into and out of the heat exchange gas chamber (120) is air, the heat exchange gas chamber (120) being in communication with an air inlet of the stack.
4. A reformer according to any one of claims 1-3, further comprising a first fin (5) provided in the reforming chamber (111) and a second fin (6) provided in the gas heat exchange chamber (113), the first fin (5) dividing the reforming chamber (111) into a plurality of reforming runners, the extending directions of the plurality of reforming runners being all parallel to the first direction, the second fin (6) dividing the gas heat exchange chamber (113) into a plurality of gas heat exchange runners, the extending directions of the plurality of gas heat exchange runners being all parallel to the first direction, the first fin (5) and the second fin (6) both being in contact with the separator (2) and being made of a heat conducting material.
5. The reformer of claim 4, wherein the reforming channel has a rectangular, isosceles trapezoid or Ω -shaped cross section; the section of the fuel gas heat exchange flow channel is rectangular, isosceles trapezoid or omega-shaped.
6. A reformer according to any one of claims 1 to 3, wherein the width of the reforming chamber (111) in the second direction is greater than the width of the gas heat exchange chamber (113) in the second direction, the second direction being parallel to the separator (2) and the second direction being perpendicular to the first direction.
7. A reformer according to any one of claims 1-3, wherein a plurality of said reforming units (1) are provided, a plurality of said reforming units (1) being stacked one on top of the other.
8. A reformer according to any one of claims 1 to 3, wherein the side of the first transition chamber (112) remote from the first separator strip (3) has a first side wall, a second side wall and a third side wall connected in sequence, the first side wall being connected to the side wall of the reforming chamber (111), the third side wall being connected to the side wall of the gas heat exchange chamber (113), the second side wall being arcuate.
9. A fuel cell comprising a reformer as claimed in any one of claims 1 to 8, and further comprising a stack, the fuel gas outlet of the reformer being in communication with the reactant gas inlet of the stack.
10. The fuel cell according to claim 9, wherein the heat exchange gas into and out of the heat exchange gas chamber (120) is air, the heat exchange gas chamber (120) being in communication with the air inlet of the stack, the fuel cell further comprising an air preheater located upstream of the reformer in the flow direction of the air and for heating the air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311410209.0A CN117383515A (en) | 2023-10-27 | 2023-10-27 | Reformer and fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311410209.0A CN117383515A (en) | 2023-10-27 | 2023-10-27 | Reformer and fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117383515A true CN117383515A (en) | 2024-01-12 |
Family
ID=89462726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311410209.0A Pending CN117383515A (en) | 2023-10-27 | 2023-10-27 | Reformer and fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117383515A (en) |
-
2023
- 2023-10-27 CN CN202311410209.0A patent/CN117383515A/en active Pending
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