Abstract:
A multi-channel upright reformer for a fuel cell is provided, which has a simple structure by breaking from an existing complicated channel structure to allow fluids such as fuel and vapor to be stably flow, thereby improving durability and achieving an efficient reforming reaction and an efficient operation of the fuel cell. A method for manufacturing compactly a reformer by minimizing an area where heat exchange is performed and expand of a fuel cell due to the resulting decrease in manufacturing cost. Also a reformer for semipermanently using by frequently exchanging a catalyst used in a reforming reaction and supply the reformer at a low price by significantly decreasing cost consumed for the catalyst is provided.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a multi-channel upright reformer for a fuel cell merged with a heater, and more particularly, to a multi-channel upright reformer for a fuel cell merged with a heater which facilitates mounting of a combustor and previously prevents pressure from being dropped by configuring one or more channels in an upright cross structure to achieve an efficient reforming reaction and is manufactured with high durability and a compact size to improve economic efficiency. 
         [0003]    2. Related Art 
         [0004]    In general, a fuel cell is a generation system that directly converts chemical reaction energy of hydrogen contained in a hydrocarbon based material such as methanol, ethanol, and natural gas and oxygen into electric energy. 
         [0005]    The fuel cell is classified into a phosphate fuel cell, a molten carbonate fuel cell, a solid oxide fuel cell, a polyelectrolyte or alkali fuel cell, and the like according to the type of electrolyte used in the fuel cell. 
         [0006]    The respective fuel cells fundamentally operate according to the same principle, but types, operating temperatures, catalysts, and electrolytes of fuel are different from each other. 
         [0007]    Among them, the solid oxide fuel cell (SOFC) as a fuel cell using solid oxide such as zirconium oxide (ZrO2) or ceria (CeO2) as electrolyte generally operates at a high temperature of 700 to 1000° C. and can be used as the generation system in that since oxide ions (O2-) are conducted, oxygen in the air electrochemically reacts even in hydrocarbon such as methane or butane as hydrogen in principle. 
         [0008]    Further, a generation solid oxide fuel cell system includes a stack serving to produce electricity, an M-BOP serving to supply fuel to the inside of the stack and collect fuel and heat discharged and abandoned from the stack, and an E-POP serving to convert DC into AC so as to supply the produced electricity to home appliances and the mechanical balance of plants (M-BOP) includes a reformer that converts city gas as fuel of the fuel cell into hydrogen. 
         [0009]    The reformer is a content primarily to be handled in the present invention and the reformer is a device that converts or reforms fuel containing hydrogen into hydrogen gas through a chemical catalytic reaction and in general, when a schematic configuration of the reformer is described, the reformer is constituted by a combustion reaction unit generating and supplying heat energy, generating hydrogen gas from the fuel by using the heat energy, and a carbon monoxide removing unit reducing the concentration of oxide monoxide contained in the hydrogen gas. 
         [0010]    The reformer having the above configuration has a channel structure which is very complicatedly configured in order to increase efficiency in heat exchange as disclosed in Korean Patent Application No. 10-2004-0047023 (Title of Invention: FUEL CELL SYSTEM AND REFORMER USED THERETO) and Korean Patent Application No. 10-2005-0030566 (Title of Invention: PLATE TYPE REFORMER AND FUEL CELL SYSTEM HAVING THE SAME). 
         [0011]    That is, channels (a flow path and flow passages of water and gas) in the related art are configured in a winding form as disclosed in the prior technical data and the winding form disturbs the flow of fluids and decreases the velocity of the flow so as to maximize the efficiency in heat exchange, but a pressure drop is rather amplified and hydrogen as fuel of the stack is not smoothly supplied due to inclination to the maximization of the efficiency in heat exchange, and as a result, a problem that the stack may malfunction comes to the fore. 
         [0012]    In particular, since the heat exchange process is performed in the channel which is winding and complicated, the volume needs to be increased for efficient heat exchange and a problem that the durability of a reactor deteriorates due to a crack by heat expansion under a high-temperature condition. 
         [0013]    Moreover, the reformer has a structure in which it is difficult or impossible to exchange the catalyst, and as a result, exchanging the catalyst may be difficult and the catalyst is supported at one side of the channel or only a special type catalyst is configured to be used, and as a result, there is a problem that use convenience and economic efficiency are extremely low. 
         [0014]    In addition, as disclosed in the prior art, since the fuel and vapor enter while being mixed at an inlet, when room-temperature fuel and high-temperature vapor meet, the high-temperature vapor is condensed and some of the vapor is converted into a phase of water, and as a result, a two-phase behavior is shown. This blocks the narrow and winding channel and increases internal pressure and water expanded by internal evaporation pressure further increases the internal pressure to bring about serious durability problems such as total damage of the entirety of a welded part including a crack of the welded part, thereby preventing an efficiency operation of the fuel cell. 
         [0015]    Further, in the prior art, a water heater needs to be separately provided at a front end of the reactor, and as a result, construction cost of a system may increase and an operating method may be complicated. 
         [0016]    In addition, as disclosed in the prior art, the reformer in the related art has a structure in which multiple disk-type plates are horizontally stacked and under such a structure, a combustor cannot be mounted, and as a result, electricity is used as a heat source or high-priced platinum is used as a combustion catalyst and the reformer is not practical and popular due to a burden such as significant economic cost. 
         [0017]    Accordingly, a reformer for a fuel cell having a compact size, which has improved the durability of the fuel cell and the reformer configured in the fuel cell and reduces an economic cost burden and a fuel cell with the reformer are required. 
       SUMMARY OF THE INVENTION 
       [0018]    An object of the present invention is to provide a multi-channel upright reformer for a fuel cell, which has a simple structure by breaking from an existing complicated channel structure to allow fluids such as fuel and vapor to be stably flow, thereby improving durability and achieving an efficient reforming reaction and an efficient operation of the fuel cell. 
         [0019]    Another object of the present invention is to compactly manufacture a reformer by minimizing an area where heat exchange is performed and expand of a fuel cell due to the resulting decrease in manufacturing cost. 
         [0020]    Yet another objet of the present invention is to semipermanently use a reformer by frequently exchanging a catalyst used in a reforming reaction and supply the reformer at a low price by significantly decreasing cost consumed for the catalyst. 
         [0021]    In accordance with an embodiment of the present invention, a multi-channel upright reformer for a fuel cell merged with a heater includes: a heat transfer unit  100  in which each of a water inflow pipe  110  through which water flows into a preheating channel part  500  and an inflow pipe  120  through which natural gas for reforming flows into the preheating channel part  500  is configured, a discharge pipe  130  through which reformed reforming gas is discharged is formed on the bottom of the inflow pipe  120  and an exhaust port  140  through which a combustion exhaust gas is discharged is formed on the top of the inflow pipe  120 , a connection unit  150  is integrally formed on the other side of the exhaust port  140  so as to be easily hermetically joined coupled with the combustion supporting unit  200 , and an exhaust gas channel part  700  guiding the combusted exhaust gas to be exhausted, a reforming channel part  600  in which an actual reforming reaction is achieved and the discharge pipe  130  is connected and configured, and the preheating channel part  500  in which the water inflow pipe  110  and the inflow pipe  120  through which the water and the natural gas flow are connected and configured and preheating is achieved are integrally configured on the other side of the exhaust port  140 , which are configured therein; a combustion supporting unit  200  on which either any one of a combustion part  250  generating heat through combustion by using the natural gas and stack unreaction fuel as raw materials or a heater which an inflow passage of high-temperature air when the combustion part  250  is not mounted is detachably mounted and fixed; a catalyst input unit  300  having a structure in which opening is easy at the time of inputting the catalyst input for the reforming reaction and mounted on the other side of the inflow pipe  120  through which the natural gas flows in a structure to be easily opened with the heat transfer unit  100 ; and a distribution housing  400  guiding the reforming gas subjected to the reforming reaction to be discharged through the discharge pipe  130  in the reforming channel part  600  and detachably mounted on one side of the bottom of the heat transfer unit  100 , wherein the heat transfer unit  100  includes each of one or more preheating channel parts  500  in which the water and the natural gas flow and are preheated, one or more reforming channel parts  600  guiding the actual reforming reaction of the natural gas and the water by the catalyst, and one or more exhaust gas channel parts  700  guiding gas combusted in the combustion unit  200  to be discharged, and the reforming channel parts  600  are configured at left and right sides based on the center of the preheating channel part  500 , respectively, the exhaust gas channel parts  700  are configured at left and right sides of the reforming channel part  600 , respectively, and the preheating channel parts  500 , the reforming channel parts  600 , and the exhaust gas channel parts  700  are uprightly mounted on a receiving groove  160  to facilitate preheating and discharge of the combusted gas. 
         [0022]    A sealing gasket  260  may be configured between the connection unit  150  of the heat transfer unit  100  and the combustion supporting unit  200 . 
         [0023]    A filter  170  for filtering minute dust may be configured on one side of the discharge pipe  130  toward the heat transfer unit  100 . 
         [0024]    The exhaust port  140  may have a connection unit  141  so as to be fixed with an extended pipe by any one method of flange joining, screw coupling, and a fusion coupling method by welding. 
         [0025]    A 3D structure combustor  241  of which the top is opened may be provided in the combustion part  250  and a heat diffusion unit  242  constituted by either of a panel sheet or a metallic net having multiple through-holes to guide heat to be diffused in overall may be configured inside the combustor  241  and a connection unit  210  corresponding to the connection unit  150  of the heat transfer unit  100  may be formed on one side of the edge of the combustor  241 , and each of an air inflow port  220  through which combustion air flows and a natural gas inflow port  230  through which combustion natural gas flows may be configured at one side of the combustor  241  and an ignition switch  240  may be provided on one front side of the combustor  241  to transfer heat to the preheating channel part  500 . 
         [0026]    The catalyst input unit  300  may be configured to include a mounting block  310  having a input/discharge hole  311  which facilitates coupling with the heat transfer unit  100  and is capable of inputting the catalyst, a catalyst fixing bar  320  inserted into the input/discharge hole  311  to stably support and fix the catalyst, a cover  340  fastened and fixed to the mounting block  310  in order to prevent the catalyst fixing bar  320  from being separated and removed, and a gasket  330  maintaining airtightness between the cover  340  and the mounting block  310 . 
         [0027]    The distribution housing  400  may be configured to be easily mounted on the heat transfer unit  100  and have a semicylindrical shape in which the distribution housing  400  is cut in the longitudinal direction and has a distribution chamber  410  to facilitate a flow including inflow and outflow of gas, which is formed therein. 
         [0028]    The preheating channel part  500  integrated with the heat transfer unit  100  may be formed by a disk-like plate and an outflow preventing jaw  510  may be configured on the periphery of the preheating channel part  500  so as to prevent the water and the natural gas which flow in from flowing out and an outlet groove  520  guiding gas to easily move to the reforming channel part  600  may be formed on a lower corner, an injection unit  530  having an injection  531  temporarily storing and uniformly distributing and minutely injecting the water, which is integrally configured on the bottom thereof may be configured on one side of the water inflow pipe  110  through which the water flows, and a heating fin  540  may be provided below the injection unit  530  and a distribution unit  541  inclined to uniformly distribute and move the natural gas which flows in downward may be formed above the heat transfer fin  540  and an extension opening part  542  of which the end extends toward the outlet groove  520  may be configured on the other side of the distribution part  541  so as to easily discharge mixed gas. 
         [0029]    The reforming channel part  600  may be formed by the disk-like plate and an outflow preventing jaw  610  may be configured on the periphery of the reforming channel part  600  so as to prevent the mixed gas which flows from the preheating plate  500  from flowing out, an inflow groove  620  through which the mixed gas discharged from the preheating plate  500  flows may be formed on the lower corner, and an input groove  630  may be configured on the top of the inflow groove  620  so that the catalyst input through the catalyst input unit  300  flows into the reforming plate  600 , while a distribution diffusion layer  640  may be configured on the inner bottom of the reforming channel part  600  so that the mixed gas which flows through the inflow groove  620  is uniformly distributed. 
         [0030]    The exhaust gas channel part  700  may be formed by the disk-like plate and has a structure in which the top and the bottom are opened and include an outflow preventing jaw  710  configured on the side thereof so as to prevent the exhausted gas from flowing out, and a heat transfer fin  720  may be mounted inside the outflow preventing jaw  710 . 
         [0031]    One or more sensors  800  may be mounted and fixed onto an exterior of the heat transfer unit  100  so as to sense an internal temperature of the preheat transfer unit  100  and an exhaust state of the catalyst. 
         [0032]    A multi-channel upright reformer for a fuel cell merged with a heater provided in the present invention has a simple structure by breaking from a structure of a winding minute path (channel) in which a pressure drop is severe in the related art to reduce or minimize the pressure drop and a capacity is easily expanded through channel extension in left and right directions according to a reforming capacity and fluids such as fuel and vapor can stably flow, and as a result, durability is improved and the fluids are seamlessly and stably supplied to a stack through an efficient reforming reaction. 
         [0033]    Further, the reformer can be compactly manufactured by minimizing an area where heat exchange is performed to decrease manufacturing cost and the reformer is semipermanently used and low-priced catalysts including a pellet type, a sphere type, and the like are easily used because catalysts used for a reforming reaction can be frequently exchanged, thereby significantly reducing operating cost. 
         [0034]    In addition, a reforming unit and a preheat transfer unit are integrated as one in a heat transfer unit, and as a result, a separate preheater cannot be provided and a pretreatment process can be simplified, thereby significantly reducing prime cost. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0035]      FIG. 1  is a perspective view showing a preferred embodiment of the present invention; 
           [0036]      FIG. 2  is an exploded perspective view showing a preferred embodiment of the present invention; 
           [0037]      FIG. 3  is a front view showing a preferred embodiment of the present invention; 
           [0038]      FIG. 4  is a side view showing a preferred embodiment of the present invention; 
           [0039]      FIG. 5  is a schematic plan cross-sectional view showing a preferred embodiment of the present invention; 
           [0040]      FIG. 6  is a front configuration diagram showing a state in which an exhaust gas channel part in a reformer of the present invention is mounted; 
           [0041]      FIG. 7  is a front configuration diagram showing a state in which a reforming channel part in the reformer of the present invention is mounted; 
           [0042]      FIG. 8  is a front configuration diagram showing a state in which a preheating channel part in the reformer of the present invention is mounted; and 
           [0043]      FIG. 9  is a perspective view showing another embodiment of the present invention. 
       
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0044]    Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and a preferred embodiment. 
         [0045]    First, a core of a multi-channel upright reformer S for a fuel cell merged with a heater provided in the present invention is constituted by a heat transfer unit  100  in which a preheating channel part  500 , a reforming channel part  600 , and an exhaust gas channel part  700  are uprightly mounted and integrally configured, a combustion supporting unit  200  detachably mounted and fixed on the bottom of the heat transfer unit  100 , a catalyst input unit  300  mounted on the side of the heat transfer unit  100  to frequently input a catalyst whenever the catalyst is exhausted, and a distribution housing  400  facilitating movement of gas from the preheating channel part  500  to the reforming channel part  600  as shown in  FIGS. 1 and 2 . 
         [0046]    In this case, the heat transfer unit  100  includes a water inflow pipe  110  through which water flows into the preheating channel part  500  and an inflow pipe  120  through which natural gas for reforming flows into the preheating channel part  500  as shown in  FIGS. 1 and 2 . 
         [0047]    Further, a discharge pipe  130  through which reformed reforming gas is discharged is formed on the bottom of the inflow pipe  120  and an exhaust port  140  through which a combustion exhaust gas is discharged is formed on the top of the inflow pipe  120 , a connection unit  150  is integrally formed on the other side of the exhaust port  140  so as to be easily hermetically joined coupled with the combustion supporting unit  200  and the exhaust gas channel part  700  guiding the combusted exhaust gas to be exhausted, the reforming channel part  600  in which an actual reforming reaction is achieved and the discharge pipe  130  is connected and configured, and the preheating channel part  500  in which the water inflow pipe  110  and the inflow pipe  120  through which the water and the natural gas flow are connected and configured and preheating is achieved are integrally configured on the other side of the exhaust port  140 . 
         [0048]    Moreover, one or more sensors  800  are mounted and fixed onto an exterior of the heat transfer unit  100  so as to sense an internal temperature of the preheat transfer unit  100  and an exhaust state of the catalyst, and as a result, a user may frequently check the internal temperature of the heat transfer unit  100  and the exhaust state of the catalyst. 
         [0049]    Further, the heat transfer unit  100  includes each of one or more preheating channel parts  500  in which the water and the natural gas flow and are preheated, one or more reforming channel parts  600  guiding the actual reforming reaction of the natural gas and the water by the catalyst, and one or more exhaust gas channel parts  700  guiding gas combusted in the combustion unit  200  to be discharged as shown in  FIGS. 5 to 8  and herein, the reforming channel parts  600  are configured at left and right sides based on the center of the preheating channel part  500 , respectively, the exhaust gas channel parts  700  are configured at left and right sides of the reforming channel part  600 , respectively, and the preheating channel parts  500 , the reforming channel parts  600 , and the exhaust gas channel parts  700  are uprightly mounted on a receiving groove  160  to facilitate preheating and discharge of the combusted gas. 
         [0050]    In this case, when the respective channels  500 ,  600 , and  700  are mounted on the heat transfer unit  100 , the respective channels  500 ,  600 , and  700  are integrally configured so as to maintain a hermetical state and the respective channels  500 ,  600 , and  700  may be fused and fixed by welding. 
         [0051]    The respective channels  500 ,  600 , and  700  are uprightly configured as described above to reduce a total volume required for heat exchange and heat is also more stably and efficiently transferred than a recumbent structure in the related art. 
         [0052]    In particular, capacity extension is impossible due to various problems including heat transfer and heat exchanged in the recumbent structure in the related art, while the present invention provides an upright structure, and as a result, the arbitrary capacity extension may be impossible and disturbance of an operation of equipment is not caused in spite of the capacity extension. 
         [0053]    Further, a sealing gasket  260  is configured between the connection unit  150  of the heat transfer unit  100  and the combustion supporting unit  200  as shown in  FIG. 2 . 
         [0054]    In addition, a filter  170  for filtering minute dust is configured on one side of the discharge pipe  130  toward the heat transfer unit  100  as shown in  FIG. 7  and the exhaust port  140  has a connection unit  141  so as to be coupled and fixed with an extended pipe by any one method of flange joining, screw coupling, and a fusion coupling method by welding. 
         [0055]    Further, either any one of a combustion part  250  generating heat through combustion by using the natural gas and stack unreaction fuel as raw materials or a heater which an inflow passage of high-temperature air when the combustion part  250  is not mounted is detachably mounted and fixed onto the combustion supporting unit  200  as shown in  FIG. 2 . 
         [0056]    In this case, a 3D structure combustor  241  of which the top is opened is provided in the combustion part  250  and a heat diffusion unit  242  constituted by either of a panel sheet or a metallic net having multiple through-holes to guide heat to be diffused in overall is configured inside the combustor  241  as shown in  FIG. 2 . 
         [0057]    Further, a connection unit  210  corresponding to the connection unit  150  of the heat transfer unit  100  is formed on one side of the edge of the combustor  241 , and each of an air inflow port  220  through which combustion air flows and a natural gas inflow port  230  through which combustion natural gas flows are configured at one side of the combustor  241  and an ignition switch  240  is provided on one front side of the combustor  241  to transfer heat to the preheating channel part  500 . 
         [0058]    Further, the connection units  150  and  210  may be coupled and fixed by any one method of the flange joining, the screw coupling, and the fusion coupling method by welding. 
         [0059]    The combustion part  250  is mounted to activate the reforming reaction, but when the catalyst is used as the combustion catalyst, the combustion part  250  is not required, and as a result, the header  290  which is the inflow passage of the high-temperature air is mounted on the bottom of the heat transfer unit  100  as shown in  FIG. 9  and low-priced catalysts including a pellet type, a sphere type, and the like are used to reduce operating cost. 
         [0060]    In addition, the catalyst input unit  300  is configured to include a mounting block  310  having a input/discharge hole  311  which facilitates coupling with the heat transfer unit  100  and is capable of inputting the catalyst, a catalyst fixing bar  320  inserted into the input/discharge hole  311  to stably support and fix the catalyst, a cover  340  fastened and fixed to the mounting block  310  in order to prevent the catalyst fixing bar  320  from being separated and removed, and a gasket  330  maintaining airtightness between the cover  340  and the mounting block  310  as shown in  FIGS. 2 and 7  and has a structure in which opening is easy at the time of inputting the catalyst input for the reforming reaction. 
         [0061]    Further, the distribution housing  400  guides the reforming gas subjected to the reforming reaction to be discharged through the discharge pipe  130  in the reforming channel part  600  and is detachably mounted on one side of the bottom of the heat transfer unit  100 , therefore, when additionally described, the distribution housing  400  has a semicylindrical shape in which the distribution housing  400  is cut in the longitudinal direction and has a distribution chamber  410  to facilitate a flow including inflow and outflow of gas, which is formed therein as shown in  FIGS. 7 and 8 . 
         [0062]    In addition, the preheating channel part  500  integrated with the heat transfer unit  100  is formed by a disk-like plate as shown in  FIG. 8  and an outflow preventing jaw  510  is configured on the periphery of the preheating channel part  500  so as to prevent the water and the natural gas which flow in from flowing out and an outlet groove  520  guiding gas to easily move to the reforming channel part  600  is formed on a lower corner, an injection unit  530  having an injection  531  temporarily storing and uniformly distributing and minutely injecting the water, which is integrally configured on the bottom thereof is configured on one side of the water inflow pipe  110  through which the water flows, and a heating fin  540  is provided below the injection unit  530 . 
         [0063]    In particular, the water injected from the injection  531  is widely and uniformly distributed in a vertical direction and a diagonal direction of a wall. 
         [0064]    Moreover, a distribution unit  541  inclined to uniformly distribute and move the natural gas which flows in downward is formed above the heat transfer fin  540  and an extension opening part  542  of which the end extends toward the outlet groove  520  is configured on the other side of the distribution part  541  so as to easily discharge mixed gas to minimize the pressure drop. 
         [0065]    In this case, only a part of the outflow preventing jaw  510  at the inflow pipe  120  through which the natural gas flows and a part of the outlet groove  520  allowing the gas to move to the reforming channel are just opened and the residual parts of the outflow preventing jaw  510  has a structure in which the airtightness is maintained and in particular, only the outflow preventing jaw  510  on the periphery is present in the present invention, and as a result, there is no concern about the pressure drop as compared with the case in which the channel (path) is manufactured in a complicated structure in the related art. 
         [0066]    Further, the reforming channel part  600  is formed by the disk-like plate as shown in  FIG. 7  and an outflow preventing jaw  610  is configured on the periphery of the reforming channel part  600  so as to prevent the mixed gas which flows from the preheating plate  500  from flowing out, an inflow groove  620  through which the mixed gas discharged from the preheating plate  500  flows is formed on the lower corner, and an input groove  630  is configured on the top of the inflow groove  620  so that the catalyst input through the catalyst input unit  300  flows into the reforming plate  600 , while a distribution diffusion layer  640  is configured on the inner bottom of the reforming channel part  600  so that the mixed gas which flows through the inflow groove  620  is uniformly distributed. 
         [0067]    Only a part of the reforming channel part  600  where the fluid (gas) flows in and out also has an opened structure, and as a result, the airtightness is maintained in overall and the reforming channel part  600  is structurally conveniently configured. 
         [0068]    Further, the exhaust gas channel part  700  is formed by the disk-like plate as shown in  FIG. 6  and has a structure in which the top and the bottom are opened and includes an outflow preventing jaw  710  configured on the side thereof so as to prevent the exhausted gas from flowing out, and a heat transfer fin  720  is mounted inside the outflow preventing jaw  710 . 
         [0069]    When an operation of the multi-channel upright reformer S for a fuel cell merged with a heater according to the present invention, which has such a feature is described, first, the combustion part  250  is actuated by actuating the ignition switch  240  and heat generated from the combustion part  250  is transferred to the preheating channel part  500  to preheat the preheating channel part  500 . 
         [0070]    When the preheating is verified, the water and the natural gas are allows to flow into the preheating channel part  500  by opening the water inflow pipe  110  and the inflow pipe  120 . 
         [0071]    In this case, when the water which flows in is discharged from the injection unit  530  through the injection  531 , the water is discharged in a minute injection form and the inflow water becomes a vapor state while passing through the preheating channel part  500  to move to the preheating channel part  600  simultaneously with gas. 
         [0072]    Further, the mixed gas which moves to the reforming channel part  600  causes a reforming reaction by the catalyst, and as a result, the reformed reforming gas is discharged through the discharge pipe  130  and the combusted exhaust gas generated from the combustion part  250  is finally discharged to the exhaust port  140  through the exhaust gas channel part  700 .