JP4324313B2 - Fuel reformer and manufacturing apparatus thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel reformer including a reformer for producing a reformed gas containing hydrogen by reforming a reforming fuel containing hydrocarbon and a manufacturing apparatus thereof.
[0002]
[Prior art]
For example, a fuel cell stack constructed by laminating a plurality of fuel cell units in which a solid polymer electrolyte membrane is sandwiched between an anode side electrode and a cathode side electrode and sandwiched by separators has been developed. Is being put into practical use.
[0003]
This type of fuel cell stack supplies a reformed gas (fuel gas) containing hydrocarbons, for example, hydrogen gas generated by steam reforming of an aqueous methanol solution, to the anode side electrode and an oxidant gas (oxygen gas or By supplying (air) to the cathode side electrode, the hydrogen gas is hydrogen ionized and flows in the solid polymer electrolyte membrane, whereby electric energy is obtained outside the fuel cell.
[0004]
In this case, a fuel reformer is used to generate a reformed gas containing hydrogen gas from an aqueous methanol solution and supply it to the fuel cell stack. This fuel reformer includes, for example, an evaporator for steaming a reforming fuel such as an aqueous methanol solution, and a reforming reaction is performed on the reforming fuel gas steamed through the evaporator to generate hydrogen. A reformer for generating a reformed gas containing gas, a warm-up combustor for warming up the entire system, and removing carbon monoxide in the reformed gas generated by the reformer A carbon monoxide remover, and a heat exchanger for adjusting the reformed gas to the operating temperature of the fuel cell stack.
[0005]
In the fuel reformer, pellets are generally used as the reforming catalyst, and the pellets are long in the gas flow direction. For this reason, the temperature difference in the gas flow direction of the reforming catalyst becomes large, and it is difficult to realize a desired reforming reaction in the entire catalyst portion, and the problem is that the compactness is inferior. Therefore, it is conceivable to reduce the thickness of the entire reformer by using a doughnut-shaped reforming catalyst layer orthogonal to the gas flow direction.
[0006]
For example, in the fuel reformer 2 shown in FIG. 5, a reforming chamber 6 is formed in the casing 4, and the reforming chamber 6 is arranged in the flow direction of the reformed gas and has a plurality of donut-like shapes. A reforming catalyst layer 8 is provided. A flow path member 10 is disposed while holding the outer peripheral surface and the inner peripheral surface of each reforming catalyst layer 8, and the reformed gas is supplied from the central portion side of the flow path member 10 toward the reforming catalyst layer 8. Is configured to do.
[0007]
A reformed gas channel member 12 is provided corresponding to the reforming catalyst layer 8 located on the most downstream side, and the reformed gas channel member 12 is provided with a plurality of reformed gas passage holes 14. A cover member 16 and a bottomed cylindrical body 18 fitted to the inner peripheral surface of the reforming catalyst layer 8 on the most downstream side are provided. The bottomed cylindrical body 18 has a function of preventing leakage of the reforming fuel flowing to the center side of the flow path member 10.
[0008]
[Problems to be solved by the invention]
By the way, in the above-described reformed gas flow path member 12, when the bottomed cylindrical body 18 is joined to the cover member 16, these members are constituted by thin plates of about 0.1 mm to 0.5 mm, and It is extremely difficult to set a jig corresponding to the welded portion of the bottomed cylindrical body 18. For this reason, the bottomed cylindrical body 18 is usually handled by performing a light press-fitting process on the cover member 16.
[0009]
However, there is a problem that a gap is likely to be generated at the joint portion due to the processing accuracy of the cover member 16 and the bottomed cylindrical body 18. If welding is attempted in this state, it has been pointed out that a gap between parts further expands due to thermal expansion during welding. As a result, the reformed gas flow path member 12 cannot be manufactured with high accuracy, and it becomes difficult to deal with mass production.
[0010]
The present invention solves this type of problem, and includes a reformer in which a thin plate-like bottomed cylindrical body and a cover member are securely and firmly welded without causing a gap or the like. The purpose is to provide.
[0011]
Further, the present invention provides a fuel capable of welding the thin plate-like bottomed cylindrical body constituting the reformer and the cover member reliably and easily without causing a gap and simplifying the configuration. It aims at providing the manufacturing apparatus of a reformer.
[0012]
[Means for Solving the Problems]
In the fuel reformer according to the present invention, a plurality of reforming catalyst layers whose surface direction is set orthogonal to the flow direction of the reforming fuel, and the outer peripheral surface and inner peripheral surface of the reforming catalyst layer are held. And a flow path member that supplies the reforming fuel to the reforming catalyst layer from a hole formed in a cylindrical portion that holds the inner peripheral surface, and is disposed on the most downstream side of the flow path member. A reformer comprising a reformed gas channel member is provided. The reformed gas flow path member is formed with a bottomed cylindrical body fitted to the downstream end of the cylindrical portion, and an opening for allowing the generated reformed gas to pass therethrough. A cover member to which the cylindrical body is welded, and the bottomed tubular body has a flange portion extending radially outward at an opening side end portion, and the flange portion is welded to the cover member. ing.
[0013]
Thereby, in particular, even when the bottomed cylindrical body and the cover member are formed of thin plates, the welding operation is performed with high accuracy in a state where the flange portion and the cover member are securely held. Therefore, there is no occurrence of a defective part such as a hole or a melt at the joint part between the bottomed cylindrical body and the cover member, and it is possible to efficiently manufacture a high-quality reformed gas channel member. Become.
[0014]
In the fuel reformer manufacturing apparatus according to the present invention, when the cover member constituting the reformed gas flow path member and the bottomed cylindrical body are joined, the side surface holding mechanism that holds the side surface portion of the cover member. An end edge holding mechanism for holding an end edge portion of the flange portion extending radially outward at an opening side end portion of the bottomed cylindrical body, an end portion of the flange portion, and the cover member And a welding mechanism that welds the side surface portion.
[0015]
As described above, since the flange portion of the bottomed cylindrical body is held by the edge holding mechanism, no gap is generated between the flange portion and the cover member, and the flange portion is interposed via the welding mechanism. The edge portion and the side surface portion of the cover member are easily and reliably welded. Moreover, the occurrence of thermal deformation during welding can be avoided under the action of the edge holding mechanism, the bottomed tubular body and the cover member can be stably welded, and airtightness can be reliably maintained. It becomes possible. Furthermore, since the bottomed cylindrical body is not press-fitted into the cover member, it is possible to perform a good welding process without being affected by the processing accuracy of these parts.
[0016]
Further, the side surface holding mechanism includes a fixing jig disposed on the welding surface side of the cover member and a copper back bar disposed on the surface side opposite to the welding surface of the cover member. As a result, the cover member is securely held from both sides of the side portion, and the heat dissipation is effectively improved through the back bar, and good welding work can be performed even under high heat input side welding conditions. The improvement in performance can be easily achieved.
[0017]
Furthermore, the side surface holding mechanism and the edge holding mechanism are integrally attached to the rotary table. For this reason, the whole apparatus can be easily made compact.
[0018]
In addition, by providing an end surface support mechanism that supports the end surface of the cylindrical portion provided in the cover member, the flange portion of the bottomed cylindrical body and the cover member are interposed via the end edge holding mechanism and the end surface support mechanism. It can be held firmly. Therefore, a highly accurate welding process without a gap or the like is reliably performed on the end portion of the flange portion and the side surface portion of the cover member.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an exploded perspective view of a fuel reformer 20 according to an embodiment of the present invention, and FIG. 2 is a partial cross-sectional view of the fuel reformer 20.
[0020]
The fuel reformer 20 arranges the evaporator 22, the reformer 26, the intermediate combustor 27, and the CO selective oxidizer 28 in this order along the flow direction of the reforming fuel (arrow A direction), and these The inner casing means 34 which accommodates the components integrally and constitutes the reforming chamber 30 and the gas flow path 32 between the components, and the inner casing means 34 are disposed so as to surround the inner casing means 34. And an outer casing means 35 for forming a heat insulating closed space 33 having a predetermined degree of vacuum between the outer wall and the outer wall.
[0021]
The inner casing means 34 includes a support plate 36 for arranging and supporting each component of the evaporator 22, the reformer 26, the intermediate combustor 27, and the CO selective oxidizer 28, and the evaporator supported by the support plate 36. 22, first plate-like inner cases 38a, 40a and second plate-like inner cases 38b, 40b for accommodating the reformer 26, the intermediate combustor 27, and the CO selective oxidizer 28.
[0022]
As shown in FIG. 1, the support plate 36 is composed of a thin plate material having a single elasticity, for example, a metal plate, and includes a first opening 46 that accommodates the evaporator 22, the reformer 26, and the intermediate plate. A second opening 48 that is long in the direction of arrow A for accommodating the combustor 27 and the CO selective oxidizer 28 is provided. The support plate 36 is formed with three semi-cylindrical portions 52 corresponding to the three tubes 50 of the evaporator 22 at the end on the first opening 46 side, and the end of the second opening 48. On the side, a semi-cylindrical portion 56 is provided corresponding to the tube 54 of the CO selective oxidizer 28. Similarly, a semi-cylindrical portion 58 is provided at the boundary between the first and second openings 46 and 48, while methanol vapor conduits 60 a and 60 b are provided on both long sides of the second opening 48. A plurality of semi-cylindrical portions 68a and 68b are provided corresponding to the air conduit 62 and the cooling water conduits 66a and 66b.
[0023]
The first and second plate-like inner cases 38a, 38b are configured to have a substantially oval shape (flat shape) when viewed from the front, and a flange portion 70 is formed around each opening side end. The flange portion 70 is provided with three semi-cylindrical portions 72 corresponding to the tubes 50 of the evaporator 22, and a single semi-cylindrical portion 74 is formed on the opposite side of the semi-cylindrical portion 72. The Holes 78a and 78b are formed in the second plate-like inner case 38b corresponding to the connecting portions 76a and 76b provided in the evaporator 22.
[0024]
The first and second plate-like inner cases 40a, 40b are configured to have a substantially elliptical shape when viewed from the front, and the inside of the reforming chamber is formed by overlapping the flange portions 80 provided at the respective opening side ends. 30 is formed. At both ends in the longitudinal direction of the flange portion 80, a semi-cylindrical portion 82 corresponding to the semi-cylindrical portion 74 and a semi-cylindrical portion 84 corresponding to the tube 54 of the CO selective oxidizer 28 are provided. The part is provided with semi-cylindrical parts 86 a and 86 b corresponding to the semi-cylindrical parts 68 a and 68 b of the support plate 36. On the inner walls of the first and second plate-like inner cases 40a and 40b, bulging portions 88a and 88b projecting toward the reforming chamber 30 are formed.
[0025]
The outer casing means 35 forms a heat insulating closed space 33 between the first plate-like inner cases 38a, 40a and the outer walls of the second plate-like inner cases 38b, 40b, and the first plate-like inner case 38a, A first plate-like outer case 90a and a second plate-like outer case 90b are provided to surround 40a and the second plate-like inner cases 38b, 40b.
[0026]
The first and second plate-like outer cases 90a and 90b are configured to have a substantially elliptical shape when viewed from the front, and a rotating flange portion 100 is formed at each opening side end. A semi-cylindrical portion 102 corresponding to the tube 50 of the evaporator 22 and a semi-cylindrical portion 104 corresponding to the tube 54 of the CO selective oxidizer 28 are formed at both ends in the longitudinal direction of each flange portion 100, On both sides of the portion 100, semi-cylindrical portions 106a and 106b corresponding to the semi-cylindrical portions 86a and 86b of the first and second plate-like inner cases 40a and 40b are provided. A semi-cylindrical portion 107 corresponding to a leak check conduit (not shown) is provided on one side of the flange portion 100.
[0027]
Disk-shaped bulging portions 108a and 108b for supporting the first plate-shaped inner case 38a are formed in the first plate-shaped outer case 90a, while the second plate-shaped outer case 90b is formed in the second plate-shaped outer case 90b. Disk-shaped bulging portions 110a and 110b that support the second plate-shaped inner case 38b are formed. Holes 112a and 112b through which the connecting portions 76a and 76b of the evaporator 22 are inserted are formed in the bulging portion 110b.
[0028]
With the evaporator 22, the reformer 26, the intermediate combustor 27, and the CO selective oxidizer 28 disposed in the first plate-like inner cases 38a, 40a via the support plate 36, the second plate-like inner case 38b, 40b is arranged by overlapping the flange portions 70 and 80, and the flange portions 70 and 80 are fixed to each other by spot welding or the like. The first and second plate-like outer cases 90a and 90b are arranged so as to cover the first plate-like inner cases 38a and 40a and the second plate-like inner cases 38b and 40b, and the respective flange portions 100 are overlapped. Fixed by spot welding.
[0029]
As shown in FIG. 2, the reformer 26 integrally fixes the first to fifth reforming catalyst layers 114a to 114e and the inner peripheral surfaces of the first to fifth reforming catalyst layers 114a to 114e. First to fifth flow path members 118a to 118e that provide a cylindrical portion 116 and integrally hold the outer peripheral surfaces of the first to fifth reforming catalyst layers 114a to 114e, and the fifth reforming catalyst layer And a reformed gas flow path member 119 disposed on the downstream side (the most downstream side) of 114e.
[0030]
The first to fifth reforming catalyst layers 114a to 114e are made of copper or a zinc-based catalyst, and are set in a donut-shaped honeycomb structure. The surface direction of each honeycomb catalyst is orthogonal to the flow direction of the reforming fuel in the reforming chamber 30 (arrow A direction), and the honeycomb catalysts are arranged in parallel in the arrow A direction. The rectifying plates 120 are fixed on the upstream side of the first to fifth reforming catalyst layers 114a to 114e in the flow direction of the reforming fuel. The rectifying plate 120 has an appropriate pressure loss, equalizes the flow of the reforming fuel to the first to fifth reforming catalyst layers 114a to 114e, and equalizes the flow in the surface of each catalyst layer. It has a function to do. A plurality of hole portions 122 are formed on the outer peripheral portion of the cylindrical portion 116 corresponding to the first to fifth reforming catalyst layers 114a to 114e.
[0031]
The reformed gas flow path member 119 is fitted with the cover member 124 provided integrally with the tubular portion 116 and the tubular portion 116 so that the reforming fuel is supplied from the downstream end of the tubular portion 116. A bottomed cylindrical body 126 for preventing discharge. The cover member 124 has substantially the same shape as the first to fifth flow path members 118a to 118e, and the side surface portion 128 whose diameter increases in the direction of the arrow A is used for allowing the reformed gas to pass therethrough. A plurality of hole portions 130 are formed, and an end portion of the side surface portion 128 is integrally provided with a ring portion 132 held by the bulging portions 88a and 88b of the first and second plate-like inner cases 40a and 40b. It has been.
[0032]
As shown in FIG. 3, the bottomed cylindrical body 126 is provided with a flange portion 134 that extends radially outward at the opening-side end portion. The flange portion 134 and the side surface portion 128 of the cover member 124 are welded, for example, by TIG welding.
[0033]
FIG. 4 is a schematic configuration diagram of the manufacturing apparatus 200 according to the embodiment of the present invention. The manufacturing apparatus 200 joins the reformed gas flow path member 119 constituting the fuel reforming apparatus 20, and the side face holding the side face portion 128 of the cover member 124 constituting the reformed gas flow path member 119. The holding mechanism 202, the end edge holding mechanism 204 that holds the end edge of the flange 134 of the bottomed cylindrical body 126, and the end of the flange 134 and the side surface 128 of the cover member 124 are welded together. A welding torch (welding mechanism) 206 is provided, and these are integrally attached to the rotary table 208.
[0034]
The rotary table 208 is provided with a jig plate 210, and a centering jig (end surface support mechanism) 212 that supports the end surface of the cylindrical portion 116 of the cover member 124 corresponding to the rotation center of the jig plate 210. Fixed. The centering jig 212 integrally includes a flat portion 214 with which the end surface of the cylindrical portion 116 abuts and a bulging portion 216 that fits into the cylindrical portion 116 and performs centering of the cylindrical portion 116. Have.
[0035]
The side surface holding mechanism 202 includes a fixing jig 218 disposed on the welding surface side of the cover member 124 and a copper back bar 220 disposed on the surface side opposite to the welding surface of the cover member 124. The back bar 220 is held on the jig plate 210 via a plurality of support columns 222. The back bar 220 has a substantially ring shape, and a relief taper surface 224 is formed on the inner peripheral wall surface. The back bar 220 is set at a position where the inner peripheral surface side thereof is close to the outer peripheral surface of the cylindrical portion 116, and the surface 226 that supports the cover member 124 includes the flange portion 134 of the bottomed cylindrical body 126 and the cover. It extends to the cylindrical portion 116 side from the welded portion with the member 124.
[0036]
The fixing jig 218 is provided with a relief taper surface 228 on the inner peripheral surface side, and is provided with pressing portions 230a and 230b protruding toward the back bar 220 at the inner peripheral end portion and the outer peripheral end portion. The fixed healing portion 218 is fixed to the back bar 220 via the fixing bolt 231, and the fixing bolt 231 is inserted into the hole 130 formed in the cover member 124.
[0037]
A frame 232 is attached to the rotary table 208 or a body bracket (not shown), and a clamp jig 234 is provided at the tip of the frame 232 toward the rotary table 208 side. A centering jig 238 constituting the edge holding mechanism 204 is attached to the edge of the clamp jig 234 via a bearing 236. The centering jig 238 includes a bulging portion 240 inserted into the bottomed tubular body 126 and a pressing portion that is integrally provided on the base end side of the bulging portion 240 and bulges radially outward. 242 and the pressing portion 242 presses the edge of the flange portion 134 of the bottomed cylindrical body 126. The welding torch 206 is a TIG torch, for example, and is attached to a welding robot (not shown).
[0038]
Next, an operation for manufacturing the reformed gas flow path member 119 using the manufacturing apparatus 200 configured as described above will be described.
[0039]
First, a centering jig 212 and a back bar 220 are fixed to the jig plate 210, and the cylindrical part 116 of the cover member 124 is interposed via the flat part 214 and the bulging part 216 of the centering jig 212. And the side surface 128 is disposed corresponding to the surface 226 of the back bar 220. Next, the fixing jig 218 constituting the side surface holding mechanism 202 is fixed to the back bar 220 via the fixing bolt 231, so that the side surface portion 128 of the cover member 124 is fixed by the fixing jig 218 and the back bar 220. Retained.
[0040]
Furthermore, the bottomed cylindrical body 126 is disposed corresponding to the cover member 124 via the edge holding mechanism 204. In the edge holding mechanism 204, the bulging portion 240 is fitted into the bottomed cylindrical body 126, and the pressing portion 242 connects the edge of the flange portion 134 of the bottomed cylindrical body 126 to the cover member 124. The side surface 128 is pressed and supported. At that time, the end edge holding mechanism 204 is pressurized toward the centering jig 212 via the clamp jig 234, and the uneven pressure is prevented by the frame 232. In this state, the rotary table 208 is rotated, and the flange portion 134 of the bottomed cylindrical body 126 and the side surface portion 128 of the cover member 124 are TIG welded over the entire circumference via the welding torch 206.
[0041]
In this case, in this embodiment, the end portion of the flange portion 134 and the cover member 124 in a state where the end edge portion of the flange portion 134 of the bottomed cylindrical body 126 is pressed and held via the end edge portion holding mechanism 204. Since the side surface portion 128 is welded (welded), no gap is generated between the flange portion 134 and the side surface portion 128 during the welding operation.
[0042]
In addition, the pressing part 242 constituting the edge holding mechanism 204 is inwardly spaced from the end of the flange part 134, for example, at a position 3 to 5 mm away, that is, without arc escape or molten pool contact, etc. It is set to the minimum position that does not interfere with the heat, and thermal deformation during welding can be suppressed. As a result, it is possible to effectively prevent the occurrence of a gap due to thermal deformation, and the effect that a highly accurate welding operation is stably performed can be obtained.
[0043]
Furthermore, the back bar 220 constituting the side surface holding mechanism 202 is made of a copper material having excellent thermal conductivity. For this reason, heat dissipation is improved via the back bar 220 during welding of the flange portion 134 and the side surface portion 128, and particularly, good welding is performed even under welding conditions on the high heat input side, and there is an advantage that the mass productivity is excellent. is there.
[0044]
Furthermore, it is not necessary to press-fit the bottomed cylindrical body 126 into the cylindrical portion 116 of the cover member 124. Therefore, good welding is reliably performed without being affected by the processing accuracy of the cover member 124 and the bottomed cylindrical body 126.
[0045]
Further, the bottomed cylindrical body 126 can be centered (positioned) by the bulging portion 240 that constitutes the edge holding mechanism 204, so that the welding quality is improved with a simple configuration, and the reformed gas flow path member is provided. The accuracy of the entire 119 can be improved. In addition, in the subsequent assembly process, the bottomed cylindrical body 126 can be used as a processing standard, the jig in each process can be simplified, and the accuracy can be easily improved.
[0046]
Next, the operation of the fuel reformer 20 incorporating the reformed gas flow path member 119 manufactured in this way will be described below.
[0047]
A methanol aqueous solution in which methanol and water are mixed at a predetermined mixing ratio is supplied to the evaporator 22 of the fuel reformer 20. In the evaporator 22, the methanol aqueous solution is vaporized by heat exchange between the high-temperature combustion gas and the evaporation gas, and is mixed with air and supplied into the reformer 26.
[0048]
As shown in FIG. 2, the reforming fuel supplied to the reformer 26 is introduced into the cylindrical portion 116 and led out from the hole 122 toward the first to fifth reforming catalyst layers 114a to 114e. Is done. In the first to fifth reforming catalyst layers 114a to 114e, an oxidation reaction that is an exothermic reaction and a fuel reforming reaction that is an endothermic reaction are performed by methanol water vapor and oxygen in the reforming fuel.
[0049]
The reformed gas generated through the first to fifth reforming catalyst layers 114a to 114e flows in the reforming chamber 30 in the direction of arrow A, and reaches the cover member 124 constituting the reformed gas flow path member 119. It is sent to the intermediate combustor 27 side through the formed hole 130 and the gas flow path 32, and further sent to the CO selective oxidizer 28 via the gas flow path 32. In the CO selective oxidizer 28, after the CO in the reformed gas is selectively oxidized and removed, the reformed gas is supplied to a fuel cell stack (not shown). The fuel cell stack is supplied with an oxidant gas, for example, air, and the hydrogen gas in the reformed gas and the oxygen gas in the air react to generate power.
[0050]
In this case, in the present embodiment, as shown in FIG. 3, a flange portion 134 that extends radially outward to the open-side end portion of the bottomed tubular body 126 constituting the reformed gas flow path member 119. The flange portion 134 is welded to the side surface portion 128 of the cover member 124. Thereby, in particular, a welding defect such as a gap does not occur at the welded portion between the cover member 124, which is a thin plate member, and the bottomed cylindrical body 126. Therefore, the reforming fuel does not flow in the direction of the arrow A in the cylindrical portion 116 and leaks from between the cylindrical portion 116 and the bottomed cylindrical body 126, and a good and reliable fuel reforming process is performed. The effect of being carried out is obtained.
[0051]
Further, since the cover member 124 and the bottomed cylindrical body 126 are firmly welded, the bottomed cylindrical body 126 does not cause a defect such as separation from the cover member 124. For this reason, the reformed gas flow path member 119 can be used effectively over a long period of time, which is economical.
[0052]
【The invention's effect】
In the fuel reformer according to the present invention, the bottomed cylindrical body constituting the reformed gas flow path member has a flange portion extending radially outward at the opening side end portion. Since the portion is welded to the cover member, no gap or the like is generated at the welded portion between the bottomed tubular body and the cover member. Accordingly, it is possible to reliably prevent the reforming fuel from leaking with a simple configuration and to have a desired welding strength and to be used effectively over a long period of time.
[0053]
In the fuel reformer manufacturing apparatus according to the present invention, the side surface portion of the cover member is held by the side surface holding mechanism, and the end edge portion of the flange portion of the bottomed cylindrical body is held by the end edge portion holding mechanism. In the state, the end portion of the flange portion and the side surface portion of the cover member are welded. For this reason, there is no gap between the flange portion and the cover member, and the end portion of the flange portion and the side surface portion of the cover member can be welded with high accuracy and satisfactory with a simple configuration. become. Thereby, it is possible to stably perform highly accurate welding work and to secure desired airtightness.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a fuel reformer according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional explanatory view of the fuel reformer.
FIG. 3 is a cross-sectional view of a reformed gas flow path member constituting the fuel reformer.
FIG. 4 is a schematic configuration diagram of a manufacturing apparatus according to an embodiment of the present invention.
FIG. 5 is an explanatory diagram of a fuel reformer having a doughnut-shaped reforming catalyst layer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 20 ... Fuel reformer 22 ... Evaporator 26 ... Reformer 27 ... Intermediate combustor 28 ... CO selective oxidizer 30 ... Reforming chamber 32 ... Gas flow path 34 ... Inner casing means 35 ... Outer casing means 114a-114e ... Reforming catalyst layers 118a to 118e ... flow path member 119 ... reformed gas flow path members 122, 130 ... hole 124 ... cover member 126 ... bottomed cylindrical body 128 ... side face part 134 ... flange part 200 ... manufacturing apparatus 202 ... Side surface holding mechanism 204 ... Edge edge holding mechanism 206 ... Welding torch 212, 238 ... Centering jig 218 ... Fixing jig 220 ... Back bar 226 ... Surface 230a, 230b, 242 ... Pressing part 232 ... Frame 234 ... Clamp jig 240 ... bulge part

Claims (5)

A fuel reformer including a reformer for generating a reformed gas containing hydrogen by reforming a reforming fuel containing hydrocarbon,
The reformer includes a plurality of reforming catalyst layers whose surface direction is set orthogonal to the flow direction of the reforming fuel;
A flow path for holding the outer peripheral surface and the inner peripheral surface of the reforming catalyst layer and supplying the reforming fuel to the reforming catalyst layer from a hole formed in a cylindrical portion that holds the inner peripheral surface Members,
A reformed gas channel member disposed on the most downstream side of the channel member;
With
The reformed gas flow path member is fitted to the downstream end portion of the cylindrical portion and prevents the reforming fuel from being discharged from the downstream end portion;
An opening for allowing the generated reformed gas to pass therethrough, and a cover member to which the bottomed tubular body is welded;
And providing
The bottomed cylindrical body has a flange portion extending radially outward at an opening side end portion, and the flange portion is welded to the cover member. The reforming catalyst layer retains the outer peripheral surface and the inner peripheral surface of a plurality of reforming catalyst layers whose surface direction is set orthogonal to the flow direction of the reforming fuel, and the reforming catalyst layer receives the reforming from the hole of the cylindrical portion. And a reformed gas channel member disposed on the most downstream side of the channel member, wherein the reformed gas channel member is a downstream end of the cylindrical portion. A manufacturing apparatus for manufacturing a fuel reformer comprising a bottomed cylindrical body fitted to a cover member and a cover member having an opening through which the generated reformed gas passes.
A side surface holding mechanism for holding a side surface portion of the cover member;
An edge holding mechanism for holding an edge of the flange provided to extend radially outward at the opening side end of the bottomed tubular body;
A welding mechanism for welding the end portion of the flange portion and the side surface portion of the cover member;
An apparatus for manufacturing a fuel reformer characterized by comprising: The manufacturing apparatus according to claim 2, wherein the side surface holding mechanism includes a fixing jig disposed on a welding surface side of the cover member;
A copper back bar disposed on the surface of the cover member opposite to the welding surface;
An apparatus for manufacturing a fuel reformer characterized by comprising: 4. The fuel reformer manufacturing apparatus according to claim 2, further comprising a rotary table on which the side surface holding mechanism and the edge holding mechanism are integrally mounted. 4. The manufacturing apparatus according to claim 2, further comprising an end surface support mechanism for supporting the end surface of the cylindrical portion provided on the cover member.

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