JP2005087784A - Reactor - Google Patents

Abstract

[PROBLEMS] To provide a reactor structure capable of preventing gas leakage without using a gasket.
A reaction chamber 2a in which a reaction between a catalyst and a gas is performed by being filled with a catalyst is formed in a separated state from the surroundings, and a gas supply path 2b for supplying gas to the reaction chamber 2a and a reaction chamber 2a A plurality of metal reaction plates 2 in which gas discharge passages 2c for discharging gas are formed, and gas flow paths 4b are formed and overlapped between the reaction plates 2 so as to cover the reaction chamber 2a from the plate thickness direction. And a separation plate 4 for separating adjacent reaction plates 2, and gas plates are formed, and cover plates 5 and 6 sandwiching the overlapping state of the reaction plate 2 and the separation plate 4 from both sides are provided. The overlapping surfaces of the reaction plate 2, the separation plate 3, and the cover plates 5 and 6 are joined by diffusion joining or brazing.
[Selection] Figure 1

Description

  The present invention relates to a reactor used by being connected to a fuel cell for general household power supply, a fuel cell for automobile mounting, and the like, and more particularly to a reactor for performing a chemical reaction by supplying a gas.

  A fuel cell is one in which electricity is extracted by converting hydrogen gas supplied to hydrogen ions at a fuel electrode and then reacting the hydrogen ions with supplied oxygen at the air electrode to form water. The electrode has a basic structure of an assembly of cells sandwiching the electrolyte. Hydrogen gas is reformed by reacting methanol, methane, dimethyl ether or the like with water vapor (water) and supplied in a hydrogen-rich state, and a reformer for this purpose is connected to the fuel cell. In the steam reforming, carbon monoxide (CO) is generated by the shift reaction, and the CO remover is connected to the fuel cell in order to reduce the performance of the fuel electrode.

  Japanese Patent Application Laid-Open No. 2000-154001 discloses a structure in which reaction parts for performing these reactions are assembled in a stacked state. In this structure, the catalyst for carrying out the reaction is formed into a sheet shape through which gas can flow, the sheet catalyst is sandwiched between flat plates, and a separator plate is overlapped on the outside of the flat plate to form a unit of reaction unit. The entire unit is laminated by overlapping a plurality of units. The raw material gas is supplied to a reaction unit of one unit through a manifold formed on a flat plate, while the gas after the reaction is discharged from a manifold formed on the flat plate in the same manner. The flat plate is formed with a reaction space in the central portion for carrying out the reaction by placing a sheet-like catalyst. In such a structure, for example, in the reforming section, a combustion air supply manifold, an off gas supply manifold, and a combustion gas discharge manifold are formed on the combustion side.

In such a reactor, it is necessary to prevent gas leakage. For this reason, gaskets are arranged around the overlapping portion of the flat plate and the sheet-like catalyst and around the separator plate. The gasket is cut into a shape that closes the portion excluding the manifold forming portion and the sheet-like catalyst placement portion, and is sandwiched between the flat plates in this cut state and compressed to prevent gas leakage. In order to compress the gasket, a state in which a plurality of reaction parts composed of a sheet catalyst and a flat plate are stacked is sandwiched between upper and lower press plates, a tie rod is passed through the reaction unit and the upper and lower press plates, and a nut is screwed into the tie rod. Tightening is performed.
JP 2000-154001 A

  In the conventional reactor having a laminated structure, gaskets are used to prevent gas leakage, so that many gaskets are required, and the assembly thereof is not only troublesome, but also the size of the gasket is increased.

  Further, since the gasket is formed of an elastic material such as rubber or resin, it has low durability against high temperatures, and deteriorates at an early stage under a high temperature environment to cause gas leakage. For this reason, the use limit temperature is limited, and there is a problem that it is not suitable for use in a wide range of temperatures.

  Furthermore, because the structure is such that the tie rods are passed through the entire laminated state and tightened with nuts, it is difficult not only to apply a compressive force uniformly to all gaskets, but also to compress uniformly. However, there is a problem that gas leaks from the gasket in that portion.

  The present invention has been made in consideration of such conventional problems, and can reliably prevent gas leakage without using a gasket, which makes it easy to assemble and downsize, An object of the present invention is to provide a reactor that can be used in a high temperature environment.

  In order to achieve the above object, the reactor according to the first aspect of the present invention is such that a reaction chamber in which a catalyst is charged and a reaction between the catalyst and the gas is performed is formed in a separated state from the surroundings, and a gas is supplied to the reaction chamber. A plurality of metal reaction plates formed with a gas supply path for supplying gas and a gas discharge path for discharging gas from the reaction chamber, and a gas flow path is formed, and the reaction plate is formed so as to cover the reaction chamber from the thickness direction. A separation plate that is arranged in an overlapped state and separates adjacent reaction plates; and a cover plate that is formed with a gas flow path and sandwiches the overlapped state of the reaction plate and the separation plate from both sides. The overlapping surfaces of the separation plate and the cover plate are bonded by diffusion bonding or brazing.

  According to the first aspect of the present invention, a reaction unit of one unit is formed by superimposing the reaction plate and the separation plate, and a reactor is formed by superimposing a cover plate on a state where a plurality of reaction units are stacked. . Then, by supplying the gas from the cover plate side, the gas enters the reaction chamber of the reaction plate from the separation plate to perform the reaction, and is then discharged from the gas discharge path of the reaction plate.

  In the present invention, the reaction plate, the separation plate, and the cover plate are made of metal, and their overlapping surfaces are joined by diffusion bonding or brazing. Diffusion bonding and brazing directly bond metals, and can be bonded with the metal plates in close contact. For this reason, not only gas leakage from between the metal plates does not occur, but there is no need to arrange a gasket between the metal plates. Thus, since the gasket is no longer necessary, the thickness can be reduced and the size can be reduced. In addition, since the metal plates are directly joined, the heat resistance is high, and use in a high temperature environment is possible.

  A second aspect of the present invention is the reactor according to the first aspect, wherein the entire overlapping surfaces of the reaction plate, the separation plate, and the cover plate are joined.

  As in the second aspect of the invention, joining reliability is improved by joining the entire overlapping surface by diffusion joining or brazing. For this reason, gas leakage can be prevented more effectively.

  Invention of Claim 3 is a reactor of Claim 1 or 2, Comprising: The said reaction plate has a plate which performs endothermic reaction, and a plate which performs exothermic reaction, These plates are separating plates. Are superimposed on each other.

  In the invention of claim 3, the endothermic reaction plate and the exothermic reaction plate are overlapped via the separation plate, so that heat is exchanged between the reaction plates via the separation plate. For this reason, the reaction in each plate can be promoted, and the reaction efficiency is improved.

  A fourth aspect of the present invention is the reactor according to the first or second aspect, characterized in that a monitor hole into which a temperature monitor can be inserted is formed in the separation plate.

  In the invention of claim 4, since the temperature monitor can be arranged on the separation plate, the reaction on the reaction plate can be accurately grasped and the reaction can be controlled.

  According to the present invention, since the reaction plate, the separation plate, and the cover plate are all made of metal plates and their overlapping surfaces are joined by diffusion bonding or brazing, not only gas leakage between these metal plates does not occur. This eliminates the need to place a gasket between the metal plates. Thereby, the thickness can be reduced by reducing the thickness, and the heat resistance is high, so that it can be used in a high temperature environment.

  FIGS. 1-9 is the reactor in one embodiment of this invention, and shows the form applied to the reformer connected to a fuel cell.

  As shown in FIGS. 1 and 2, the reformer 1 as a reactor is composed of a reforming catalyst plate 2 as a reaction plate, a combustion catalyst plate 3 as a reaction plate, and a separation plate 4. It is configured by overlapping in the direction. These superpositions are performed by inserting the separation plate 4 between the reaction plates 2 and 3. In this embodiment, the reforming catalyst plate 2, the separation plate 4, the combustion catalyst plate 3, The separation plate 3, the reforming catalyst plate 2,. Also, the cover plates 5 and 6 are overlapped on both sides of the overlapped state of these plates, thereby sandwiching these overlapped states.

  The reforming catalyst plate 2 and the combustion catalyst plate 3 serving as reaction plates are for reacting the catalyst and gas, and the reaction chambers 2a and 3a for carrying out the reaction by being filled with a catalyst (not shown) are inward. It is formed in the part. Further, the plates 2 and 3 are respectively formed with gas supply passages 2b and 2c for supplying gas to the reaction chambers 2a and 3a and gas discharge passages 2c and 3c for discharging the gas after reaction. Has been.

  The gas supply paths 2b and 2c are formed by penetrating small holes in the plate thickness direction with respect to the plates 2 and 3, respectively. These small holes are formed in a keyhole shape so that the lower end portion is in an open state, and the opened lower end portions communicate with the corresponding reaction chambers 2a and 3a. Thereby, the gas supplied to the gas supply paths 2b and 3b can flow into the reaction chambers 2a and 3a.

  The gas discharge paths 2c and 3c are formed by cutting out the plates 2 and 3, respectively. As shown in FIG. 2, the gas discharge path 2 c in the reforming catalyst plate 2 is formed by partially cutting out the lower end portion of the plate 2, whereby the gas is sent to the lower end of the reforming catalyst plate 2. It is discharged from the part to the outside. As shown in FIG. 4, the gas discharge passage 3 c in the combustion catalyst plate 3 is formed by cutting out a lower portion of one side surface portion (right side surface portion) of the plate 3. 3 is discharged from the side surface portion.

  The reaction chamber 2a in the reforming catalyst plate 2 generates a hydrogen-rich gas by reacting a hydrogen compound such as methane or methanol with water vapor. This source gas is supplied from the direction indicated by arrow A in FIG. On the other hand, the catalyst is packed in a solid state such as a granular or powdery form mainly composed of copper and zinc. In the reforming catalyst plate 2, hydrogen is generated by an endothermic reaction. The reaction chamber 2a, except for the gas supply path 2b and the gas discharge path 2c, is in a state separated from the surroundings so that the reacted gas does not diffuse around the reforming catalyst plate 2.

  The reaction chamber 3a in the combustion catalyst plate 3 is for burning off-gas containing the remaining hydrogen used in the fuel cell, and the catalyst therefor is filled in a solid state such as granular or powder. The off gas is supplied from the direction of arrow B in FIG. 2, and the off gas burns by an exothermic reaction. The reaction chamber 3 a is in a state in which other portions are separated from the surroundings except for the gas supply path 3 b and the gas discharge path 3 c, so that the reacted gas does not diffuse around the combustion catalyst plate 3.

  The reforming catalyst plate 2 and the combustion catalyst plate 3 have through-holes 2d and 3d having closed cross-sections penetrating in the plate thickness direction. The through holes 2d and 3d are formed to allow a gas unrelated to the corresponding plates 2 and 3 to pass therethrough, and off-gas passes through the through holes 2d of the reforming catalyst plate 2 so that the through holes of the combustion catalyst plate 3 are passed through. In 3d, the reforming raw material gas passes.

  A separation plate 4 shown in FIG. 5 is sandwiched between the reforming catalyst plate 2 and the combustion catalyst plate 3 described above. The separation plate 4 is sandwiched between the reforming catalyst plate 2 and the combustion catalyst plate 3 to separate them. Further, the separation plate 4 is formed with gas flow paths 4a and 4b each having a closed cross-sectional hole communicating with the gas supply paths 2b and 3b and the gas discharge paths 2c and 3c of the reforming catalyst plate 2 and the combustion catalyst plate 3. ing. As shown in FIG. 1, the gas flow path 4 a is disposed so as to communicate with the gas supply path 2 b of the reforming catalyst plate 2 and the through hole 3 d of the combustion catalyst plate 3, and the reforming raw material gas passes therethrough. The gas flow path 4b is disposed so as to communicate with the through hole 2d of the reforming catalyst plate 2 and the gas supply path 3b of the combustion catalyst plate 3, and off gas passes therethrough.

  The above-described separation plate 4 is in a state in which all of the portions except for the gas flow paths 4a and 4b are closed. By being sandwiched between the reforming catalyst plate 2 and the combustion catalyst plate 3, these reaction chambers 2a. 3a are blocked off. Therefore, the catalyst of the reforming catalyst plate 2 and the catalyst of the combustion catalyst plate 3 are not mixed, and the gas supplied to them and the reacted gas are not mixed.

  A monitor hole 8 is formed in the separation plate 4 in this embodiment. As shown in FIG. 5, the monitor holes 8 are formed at predetermined intervals along the width direction of the separation plate 4, and a temperature monitor (not shown) such as a thermometer is inserted into each monitor hole 8. Thus, the reaction temperature is detected. That is, the separation plate 4 transmits heat from the combustion catalyst plate 3 that performs an exothermic reaction, and transmits this heat to the reforming catalyst plate 2 that performs an endothermic reaction, and monitors the transmitted temperature. This makes it possible to control the reaction efficiently.

  Further, the separation plate 4 is disposed between the reforming catalyst plate 2 that performs an endothermic reaction and the combustion catalyst plate 3 that performs an exothermic reaction. Heat can be exchanged between the catalyst plates 3. Thereby, reaction in each plate 2 and 3 can be promoted, and reaction efficiency can be improved.

  FIG. 9 shows another form of the separation plate 4, and a sandwiching plate 4 h made of a metal plate is superimposed on both sides of a core plate 4 g made of a metal plate in which slits 4 f for the monitor holes 8 are formed at appropriate intervals. It has a joined structure. By setting it as such a structure, the magnitude | size of the monitor hole 8 and the thickness of the separation plate 4 can be adjusted arbitrarily, and it can be made versatile. In this case, the core plate 4g and the sandwiching plate 4h are joined by diffusion joining or brazing described later.

  In this embodiment, another separation plate 4x is arranged outside the combustion catalyst plate 3 in the thickness direction (left side in FIG. 1). The separation plate 4x covers an outer portion of the combustion catalyst plate 3, and the separation plate 4x is also formed with gas passages similar to the gas passages 4a and 4b.

  FIG. 2 shows a state in which the reforming catalyst plate 2, the separation plate 4, the combustion catalyst plate 3 and the separation plate 4 x are united, and a plurality of units are stacked in the thickness direction. The cover plates 5 and 6 act so as to sandwich them by being overlapped from both sides with respect to the laminated state.

  As shown in FIGS. 1 and 6, the cover plates 5 and 6 include gas flow paths 5 a, 5 b, 6 a, and 6 b that penetrate in the plate thickness direction and are pipe-shaped and protrude outward in the plate thickness direction. Yes. The gas flow paths 5a, 6a communicate with the gas supply path 2b of the reforming catalyst plate 2 and the through hole 3d of the combustion catalyst plate 3, and the gas flow paths 5b, 6b are the through hole 2d of the reforming catalyst plate 2 and the combustion catalyst plate. 3 is arranged at a position communicating with the gas supply path 3d. Therefore, the gas from the gas flow paths 5a and 6a passes through the separation plates 4, 4x and the combustion catalyst plate 3, reaches the reforming catalyst plate 2, and flows into the reaction chamber 2a from the gas supply path 2b. On the other hand, the gas from the gas flow paths 5b and 6b passes through the reforming catalyst plate 2 and the separation plates 4 and 4x, reaches the combustion catalyst plate 3, and flows into the reaction chamber 3a from the gas supply path 3b. The above-described reaction is performed by these inflows.

  The above-described reforming catalyst plate 2, combustion catalyst plate 3, separation plates 4, 4x, and cover plates 5 and 6 are joined in a superposed state by diffusion joining or brazing. In this case, the reforming catalyst plate 2, the combustion catalyst plate 3, the separation plates 4, 4x, and the cover plates 5 and 6 are formed of metal plates having the same size and the same outer shape (rectangular shape), and are aligned in the plate thickness direction. In this state, they are overlapped and joined. As the metal plate, stainless steel, carbon steel, aluminum, aluminum alloy, and other metals can be used as long as they can be joined.

  Diffusion bonding is a technique in which atoms are diffused by heating to a temperature below the melting point of the metal material with an electrode or the like with the above plates 2, 3, 4, 4x. It is. Brazing is a technique in which a brazing material such as solder is formed on the overlapping surface of the plates and the brazing material is melted to join the plates together. The brazing material may be adhered in the form of a foil, or may be adhered by plating or coating.

  In such diffusion bonding or bonding by brazing, adjacent plates are directly bonded and bonded in close contact with each other without a gap. Therefore, no gas leaks from between the joined plates. And since the plate which consists of a metal plate is joined directly, it has big heat resistance, the use in a low temperature environment and a high temperature environment is attained, and it can apply to a wide temperature environment.

  Further, since gas leakage between the plates does not occur, it is not necessary to sandwich a sealing material such as a gasket. For this reason, the thickness of the overlapping direction of the plates can be reduced, and the reactor 1 as a whole can be downsized. Furthermore, it is not necessary to use all the plates in the assembled state and to use a tie rod for compressing the gasket, and assembling can be performed easily.

  Further, in the joined state, the gas discharge path 2c of the reforming catalyst plate 2 and the gas discharge path 3c of the combustion catalyst plate 3 are in an open state, so that the reaction chambers 2a, 3a are connected from these gas discharge paths 2c, 3c. The catalyst can be filled in or the catalyst can be discharged from the reaction chambers 2a and 3a. For this reason, there exists a merit which can replace | exchange catalyst easily.

In FIG. 2, reference numeral 11 denotes a bottom plate, and reference numeral 12 denotes a side plate.
The bottom plate 11 is attached so as to cover the bottom surface side of the reactor 1 in the plate laminated state described above, and as shown in FIG. 7, bolt holes 11 a for that purpose are formed at a plurality of locations around the bottom plate 11. Further, a counterbore part 11b facing the gas discharge path 2c of the reforming catalyst plate 2 is formed in the length direction on the bottom plate 11, and the exhaust pipe 11c is attached to the counterbore part 11b so as to communicate therewith. By providing such a bottom plate 11, the hydrogen-rich gas reformed in the reforming catalyst plate 2 can be taken out.

  The side plate 12 is attached so as to cover one side surface of the stacked state of the plates. The side plate 12 is attached to a side surface of the combustion catalyst plate 3 where the gas discharge path 3c is open. As shown in FIG. 8, a counterbore part 12b facing the gas discharge path 3c is formed, and a counterbore part is formed. A discharge pipe 12c communicating with 12b is provided. By providing this side plate 12, the gas from the combustion catalyst plate 3 can be taken out. In addition, the bolt hole 12a for attaching the side plate 12 to the reactor 1 is formed in the surrounding multiple places. Further, the bottom plate 11 and the side plate 12 may be metal or resin.

  If it is necessary to prevent the catalyst from leaking out of the reaction chamber 2a of the reforming catalyst plate 2 and the reaction chamber 3a of the combustion catalyst plate 3, as shown in FIGS. And by fitting a mesh-like mat into the counterbore parts 11b and 12b of the side plate 12, the leakage can be easily prevented.

  10 to 15 show a reactor 21 according to another embodiment of the present invention. This reactor 21 is applied to a CO remover that removes CO generated by a shift reaction or the like, and is used by being connected to a fuel cell.

  As shown in FIG. 10 and FIG. 11, the CO remover 21 as a reactor has a structure in which a catalyst plate 22 as a reaction plate, a separation plate 23, and a heat medium plate 24 are sequentially stacked in the thickness direction. A unit is formed by laminating a plurality of units in the thickness direction. Then, the cover plates 26 and 27 are overlapped from both sides of the stacked state, thereby sandwiching a plurality of units.

  The catalyst plate 22 oxidizes and reduces CO. As shown in FIG. 12, a reaction chamber 22a is formed in which a catalyst for filling the catalyst plate 22 is filled. The reaction chamber 22 a is a rectangular space and is formed in the inner part of the catalyst plate 22. As the catalyst, a granular or powdered material having platinum / ruthenium as a main component and activated is used. Further, a gas supply path 22b for supplying CO to the reaction chamber 22a and a gas discharge path 22c for discharging the gas from which CO has been removed are formed in the catalyst plate 22.

  The gas supply path 22b has a keyhole shape and is formed in the upper part of the reaction chamber 22a so as to penetrate in the plate thickness direction. The lower end portion of the gas supply path 22b communicates with the reaction chamber 22a. On the other hand, the gas discharge path 22 c is formed by opening the lower end portion of the catalyst plate 22.

  The heat medium plate 24 cools the catalyst plate 22 and is superposed on the catalyst plate 22 via the separation plate 23. In order to perform cooling, a plurality of groove-like heat medium flow paths 24a are formed in the heat medium plate 24 as shown in FIGS. The heat medium flow path 24a is formed on the surface opposite to the catalyst plate 22 so as to be parallel to the horizontal direction, and each is connected to a cooling source (not shown). Further, a gas flow path 24b having a closed cross section communicating with the gas supply path 22b of the catalyst plate 22 passes through the heat medium plate 24 in the plate thickness direction. In the heat medium plate 24 of this embodiment, an opening 24c is formed at a portion corresponding to the reaction chamber 22a of the catalyst plate 22.

  Reference numeral 25 denotes a subplate that is superposed on the surface of the heat medium plate 24 where the heat medium flow path 24a is formed, and the open surface of the monitor hole 28 is sealed by the superposition of the subplate 25. The sub-plate 25 is also formed with a gas channel 25 b having a closed cross section that communicates with the gas supply channel 22 b of the catalyst plate 22.

  The separation plate 23 is disposed in an overlapping manner between the catalyst plate 22 and the heat medium plate 24, thereby separating the catalyst plate 22 and the heat medium plate 24. Further, the separation plate 23 is formed with a gas flow path 23 b having a closed cross section that communicates with the gas supply path 22 b of the catalyst plate 22 and the gas flow path 24 b of the heat medium plate 24.

  As shown in FIG. 14, the separation plate 23 is in a state where all of the portions except the gas flow path 23 b are closed, and is sandwiched between the catalyst plate 22 and the heat medium plate 24, thereby The reaction chamber 22a is covered. By being sandwiched between the catalyst plate 22 and the heat medium plate 24 in this manner, the heat of the catalyst plate 22 acts so as to be transmitted to the heat medium plate 24. Thereby, the catalyst plate 22 can be efficiently cooled, and the exothermic reaction on the plate 22 can be promoted.

  Further, the separation plate 23 is formed with a plurality of rectangular groove-like monitor holes 28 into which a temperature monitor (not shown) such as a thermometer can be inserted, whereby the temperature of the catalyst plate 22 is monitored. It has become. Reference numeral 29 denotes a subplate that is superposed on the surface of the separation plate 23 where the monitor hole 28 is formed, and the open surface of the monitor hole 28 is sealed by the superposition of the subplate 29.

  The subplate 25 on the heat medium plate 24 side and the subplate 29 on the separation plate 23 side have gas passages 29a (not shown) and 25a having closed cross-sections communicating with the gas supply passage 22b of the catalyst plate 22 in thickness. It penetrates in the direction.

  As shown in FIG. 10, the cover plates 26 and 27 include gas flow paths 26 a and 27 a that penetrate in the plate thickness direction and project in the form of pipes and protrude outward in the plate thickness direction. These gas flow paths 26a and 27a are formed so as to communicate with the gas supply path 22b of the catalyst plate 22, and gas containing CO is supplied to the catalyst plate 22 from the respective gas flow paths 26a and 27a. The

  In FIG. 11, reference numeral 30 denotes a bottom plate that is attached so as to cover the bottom surface side of the reactor 21 in the plate-laminated state described above. As shown in FIGS. 11 and 15, the bottom plate 30 is formed with a counterbore 30b facing the gas discharge path 22c of the catalyst plate 22 in the length direction, and the discharge pipe 31 communicates with the counterbore 30b. It is attached as follows. By providing such a bottom plate 30, the gas from the catalyst plate 22 can be taken out. The bottom plate 30 is formed with bolt holes 30a in the peripheral portion for attaching to the reactor 21 in a stacked state.

  A mat 33 having a metal wire entangled in a net shape is detachably fitted into the counterbore portion 30b of the bottom plate 30. The mat 33 has a mesh shape that allows gas to flow and prevents leakage of the catalyst in the catalyst plate 22. As the mat 33, a foam metal or the like can be used.

  Also in this embodiment, the catalyst plate 22, the separation plate 23, the heat medium plate 24, and the cover plates 26 and 27 are formed in the same size and the same outer shape (rectangular shape) by a metal that can be joined such as aluminum or an alloy thereof. Then, they are superposed in a state aligned in the plate thickness direction, and are joined by diffusion bonding or brazing in this superposed state. Therefore, adjacent plates can be joined directly and are in close contact with each other without gaps, so that gas does not leak from between the joined plates and has high heat resistance. Can be applied to a wide range of temperature environments. Further, since no gas leakage occurs between the plates, it is not necessary to sandwich a sealing material such as a gasket, the thickness in the overlapping direction of the plates can be reduced, and the entire reactor can be miniaturized.

  FIG. 16 shows still another embodiment of the present invention. In this embodiment, two reaction plates 41 and 42 are superposed via a separation plate 43. Each reaction plate 41, 42 has reaction chambers 41a, 42a having a rectangular closed cross section, and from gas supply paths 41b, 42b and reaction chambers 41a, 42a for supplying gas to these reaction chambers 41a, 42a. Gas discharge paths 41c and 42c for discharging gas are provided. Each of the reaction chambers 41a and 42a is filled with a catalyst that performs a gas reaction.

  The gas supply path 41b in the reaction plate 41 is formed in the upper surface portion of the reaction chamber 41a, and the gas discharge path 41c is formed in the side surface portion of the reaction chamber 41a. On the other hand, the gas supply path 42 b in the reaction plate 42 is formed in the side surface portion of the reaction chamber 42 a so as to correspond to the gas discharge path 41 c of the reaction plate 41. In addition, a gas flow path 43b penetrates through the separation plate 43 in the thickness direction, and this gas flow path 43b communicates with the gas discharge path 41c of the reaction plate 41 and the gas supply path 42b of the reaction plate 42. Are formed at positions corresponding to these.

  In such a structure, the gas supplied to the reaction chamber 41a from the gas supply path 41b of the reaction plate 41 passes through the gas flow path 43b of the separation plate 43 from the gas discharge path 41c of the side surface part and the side surface part of the reaction plate 42. Gas supply path 42b, is supplied from the gas supply path 42b to the reaction chamber 42a, and is discharged from the gas discharge path 42c to the outside.

  In such an embodiment, gas can be passed between the plurality of reaction plates. For this reason, it becomes possible to perform the stepwise reaction with respect to gas.

  The present invention is not limited to the embodiment as described above, and various modifications can be made. For example, the present invention can be similarly applied to a reactor other than a reformer or a CO remover connected to a fuel cell.

It is a disassembled perspective view of the reactor in one embodiment of this invention. It is a perspective view which shows the joining state of the reactor in one Embodiment. It is a front view of a reforming catalyst plate. It is a front view of a combustion catalyst plate. It is a front view of a separation plate. It is a front view of a cover plate. (A), (b) is the top view and front view of a baseplate. (A), (b) is the side view and front view of a side plate. It is a fragmentary sectional view showing another form of a separation plate. It is a disassembled perspective view of the reactor in another embodiment of this invention. It is a perspective view which shows the joining state of the reactor in another embodiment. It is a front view of a catalyst plate. It is a front view of a heat-medium plate. It is a front view of a separation plate. It is a front view of a baseplate. It is a perspective view of another embodiment of this invention.

Explanation of symbols

1, 21 Reactor 2 Reforming catalyst plate 3 Combustion catalyst plate 2a, 3a Reaction chamber 2b, 3b Gas supply path 2c, 3c Gas discharge path 4, 4x Separation plate 4a, 4b Gas flow path 5, 6 Cover plate 5a, 5b , 6a, 6b Gas flow path 22 Catalyst plate 23 Separation plate 26, 27 Cover plate

Claims (4)

A reaction chamber in which the catalyst is charged and the reaction between the catalyst and the gas is performed is formed in a separated state from the surroundings, and a gas supply path for supplying gas to the reaction chamber and a gas discharge path for discharging gas from the reaction chamber are provided. A plurality of formed metal reaction plates;
A separation plate for separating adjacent reaction plates, wherein a gas flow path is formed and arranged between the reaction plates so as to cover the reaction chamber from the plate thickness direction;
A gas flow path is formed, and a cover plate that sandwiches the overlapping state of the reaction plate and the separation plate from both sides,
A reactor characterized in that the overlapping surfaces of the reaction plate, separation plate and cover plate are joined by diffusion joining or brazing.   The reactor according to claim 1, wherein the entire overlapping surfaces of the reaction plate, the separation plate, and the cover plate are joined.   3. The reaction according to claim 1, wherein the reaction plate has a plate that performs an endothermic reaction and a plate that performs an exothermic reaction, and these plates are superposed via a separation plate. vessel.   The reactor according to claim 1, wherein a monitor hole into which a temperature monitor can be inserted is formed in the separation plate.

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