JP2011065786A - Combustion device, and cogeneration system equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion device using a fuel cell capable of increasing both power generation efficiency and thermal efficiency at the same time as a result of stable operation of a fuel cell, and to provide a cogeneration system equipped with the same. <P>SOLUTION: The two-combustion-chamber-type combustion device is equipped with a first combustion chamber 2 generating a pyrolysis fluid by partial combustion of a fuel and a second combustion chamber 4 in which a recombustion at high temperature is carried out for the pyrolysis fluid generated in the first combustion chamber 2. The device is constituted so that the pyrolysis fluid generated in the first combustion chamber 2 is led to the second combustion chamber 4 through the fuel cell 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a combustion apparatus using biomass or the like as fuel and a cogeneration system including the combustion apparatus.

  A cogeneration system is a system that generates two or more types of secondary energy simultaneously from primary energy, and many refer to a combined heat and power system that supplies heat and power simultaneously. Among them, a cogeneration system using a fuel cell that is small in size, has high power generation efficiency, and has a small environmental load has attracted attention in recent years, and has been actively developed (Patent Document 1, etc.). In particular, field demonstration tests including installation in ordinary households have been carried out and are also commercially available for household cogeneration systems that generate about 3 kilowatts of power using city gas as fuel.

  In contrast to these fuel cell cogeneration systems that use city gas as fuel, a fuel cell cogeneration system that uses biomass as fuel has also been proposed from the perspective of diversifying fuel and reducing carbon dioxide emissions (Patent Literature). 2 etc.).

  In these cogeneration systems, the fuel for the fuel cell is once cooled and used for fuel cell power generation, but a system in which the fuel cell is directly arranged in the combustion chamber has been proposed as a means for improving efficiency (patent) Literature 3-5 etc.).

JP 2006-134788 A JP 2006-128006 A JP-A-8-45522 JP-A-4-206362 JP 2004-319240 A

  However, in the above system, since the fuel cell is directly incorporated into the combustion device of one combustion chamber type, there are problems such that the combustion temperature is difficult to control and impurities adversely affect the fuel cell.

  Accordingly, in view of the above-described problems of the prior art, the present invention provides a combustion apparatus using a fuel cell that can stably operate the fuel cell, and as a result, can simultaneously improve power generation efficiency and thermal efficiency. It aims at providing the provided cogeneration system.

  In order to achieve the above object, a combustion apparatus according to claim 1 of the present invention includes a first combustion chamber in which fuel is partially burned to generate a pyrolysis fluid, and pyrolysis generated by combustion in the first combustion chamber. In a two-combustion chamber type combustion apparatus having a second combustion chamber for re-combusting fluid at a high temperature, the pyrolysis fluid generated in the first combustion chamber is introduced into the second combustion chamber via a fuel cell. It is comprised so that it may be performed.

  According to a second aspect of the present invention, there is provided a combustion apparatus according to the first aspect, wherein the fuel cell is disposed in the second combustion chamber.

  According to a third aspect of the present invention, there is provided the combustion apparatus according to the first aspect, wherein the fuel cell is interposed between the first combustion chamber and the second combustion chamber. is there.

  A combustion apparatus according to a fourth aspect is characterized in that, in the configuration according to any one of the first to third aspects, a high-temperature filter is provided upstream of the fuel cell.

  According to a fifth aspect of the present invention, there is provided a combustion apparatus according to the fourth aspect, wherein a catalyst filter is provided between the fuel cell and the high temperature filter.

  The combustion apparatus according to claim 6 is the configuration according to any one of claims 1 to 5, wherein the combustion chamber is not only natural biomass such as wood, waste biomass such as municipal waste, but also coal. The fossil fuel can be used as a fuel either alone or in an arbitrary ratio.

  A combustion apparatus according to claim 7 is a heat exchange having a function of exchanging heat of exhaust gas discharged from the second combustion chamber with an oxidant such as air in the configuration according to any of claims 1 to 6. It is characterized by providing a vessel.

  The combustion apparatus according to claim 8 is provided with a second combustion chamber in which the exhaust gas from the high-temperature fuel cell is burned as it is and used as a heat source in the configuration according to any one of claims 1 to 7. It is a feature.

  According to a ninth aspect of the present invention, in the configuration of the second aspect, the second combustion chamber is formed so that the fuel cell can be easily installed in the second combustion chamber and removed for maintenance. It is characterized by being.

  The cogeneration system according to claim 10 includes a first combustion chamber that partially burns fuel to generate a pyrolysis fluid, and a second combustion chamber that recombusts the pyrolysis fluid generated by the combustion in the first combustion chamber at a high temperature. A two-combustion chamber type combustion apparatus having a combustion chamber, and a fuel cell using as a fuel the pyrolysis fluid generated in the first combustion chamber, the pyrolysis fluid generated in the first combustion chamber is a fuel The first combustion chamber, the fuel cell, and the second combustion chamber are arranged so as to be introduced into the second combustion chamber via a battery.

  A cogeneration system according to an eleventh aspect is characterized in that, in the configuration according to the tenth aspect, the fuel cell is arranged in the second combustion chamber.

  A cogeneration system according to a twelfth aspect is characterized in that, in the configuration according to the tenth aspect, the fuel cell is interposed between the first combustion chamber and the second combustion chamber. It is.

  The cogeneration system according to claim 13 is the configuration according to any one of claims 10 to 12, wherein high temperature gas generated in the first combustion chamber and impurities in the pyrolysis fluid are removed using a high temperature filter. Then, it is made to send out to a 2nd combustion chamber.

  The cogeneration system according to claim 14 is the configuration according to any one of claims 10 to 13, wherein the high temperature gas and the pyrolysis fluid after removing impurities are reformed using a catalyst filter, and then the second combustion chamber. It is characterized by being introduced into.

  The cogeneration system according to claim 15 is the configuration according to any one of claims 10 to 14, wherein the fuel cell is a high-temperature type and has an electrolyte, an anode, and a cathode, and a solid oxide or an electrolyte is used as the electrolyte. A molten salt is used.

  A cogeneration system according to a sixteenth aspect is the second combustion chamber according to any one of the tenth to fifteenth aspects, wherein the supply of the oxidant gas to the cathode of the fuel cell is generated by the exhaust gas exhaust gas flow. It is characterized by being performed by negative pressure.

  A cogeneration system according to claim 17 is the configuration according to any one of claims 10 to 16, wherein the supply of the fuel fluid to the anode of the fuel cell is caused by pressure generated by partial combustion pyrolysis in the first combustion chamber, and It is characterized by being performed by the negative pressure in the second combustion chamber generated by the exhaust flow of the combustion apparatus exhaust gas.

  According to the invention described in claim 1 and claim 10, by disposing a fuel cell having a large heat capacity in the flow path of the pyrolysis fluid, the pyrolysis fluid can be used as fuel for the fuel cell. It is possible to control the temperature by facilitating rapid fluctuations in the combustion temperature and contribute to the stabilization of the operation of the apparatus.

  According to the second and eleventh aspects of the invention, it is possible to contribute to downsizing of the device and to keep the fuel cell within the operating temperature without providing a separate installation space for the fuel cell.

  According to the third and twelfth aspects of the present invention, the operating environment of the fuel cell can be more stably ensured regardless of changes in the combustion state in the combustion chamber.

  According to the inventions of claims 4, 5, 13, and 14, impurities that adversely affect the fuel cell can be removed by the high temperature filter, and the fuel cell can be stably operated. The power generation efficiency of the fuel cell can be improved by installing a quality catalyst filter.

  According to the invention described in claim 6, not only natural biomass such as wood, waste biomass such as municipal waste, but also fossil fuel such as coal can be used alone or in an arbitrary ratio and used as fuel. Because it has a chamber, it can handle a wide variety of fuels.

  According to the invention described in claim 7, the heat exchanger having a function of mixing the exhaust gas discharged from the second combustion chamber to the outside of the combustion apparatus with the oxidant supplied to the fuel cell and performing heat exchange is provided. Thus, the fuel cell can be stably operated.

  According to the eighth aspect of the present invention, the exhaust gas from the high temperature fuel cell can be directly combusted in the second combustion chamber and used as a heat source, so that the overall efficiency can be further improved.

  According to the ninth aspect of the present invention, the cogeneration system can be more easily maintained by making the shape of the second combustion chamber optimal for fuel cell maintenance.

  According to the fifteenth aspect of the present invention, by using a high-temperature fuel cell, the high-temperature gas can be used as fuel for the fuel cell without cooling.

  According to the sixteenth and seventeenth aspects of the present invention, it is not necessary to install an intake air or a blower fan by using the pressure generated in the combustion device to supply fuel to the anode and cathode of the fuel cell.

1 is a system block diagram for explaining a configuration of a cogeneration system according to Embodiment 1. FIG. 1 is a schematic diagram for explaining a configuration of a fuel cell according to Embodiment 1. FIG. It is a schematic diagram for demonstrating another structural example of the cogeneration system which concerns on Embodiment 1. FIG. 4 is a system block diagram for explaining a configuration of a cogeneration system according to Embodiment 2. FIG. 5 is a schematic diagram for explaining a configuration of a fuel cell according to Embodiment 2. FIG.

<Embodiment 1>
Hereinafter, an embodiment of a cogeneration system using a fuel cell according to the present invention will be described with reference to FIG. Here, FIG. 1 is a system block diagram showing the biomass pyrolysis cogeneration system according to the first embodiment.

  As schematically shown in FIG. 1, the present cogeneration system includes a first combustion chamber 2, a second combustion chamber 4, a boiler 1 having a heat exchanger 6, a high-temperature fuel cell 5, an inlet 3, and a high-temperature filter 8. The catalyst filter 9 is provided. The first combustion chamber 2, the second combustion chamber 4, and the like are accommodated in the casing 12, and the boiler is disposed around the first combustion chamber 2 and the second combustion chamber 4 between the casing 12 and the boiler 12. Circulating water is introduced.

  Fuel such as biomass is input into the first combustion chamber 2 from the fuel input port 7, and partial combustion of the fuel is performed. The heat generated at that time is used for pyrolysis of fuel such as biomass and boiler heating. Since the first combustion chamber 2 is mainly intended for thermal decomposition of fuel such as biomass, it is generally maintained in a temperature range of about 200 to 600 ° C. during operation. The pressure generated by this partial combustion, combined with the draft action by the exhaust gas discharged from the chimney (not shown), sends the product (pyrolysis fluid) in the first combustion chamber 2 to the second combustion chamber 4. Part of the driving force that enters.

  Pyrolysis fluid fuel containing pyrolysis gas generated by partial combustion / pyrolysis of fuel such as biomass in the first combustion chamber 2 and tar volatilized during pyrolysis is not cooled in the middle, and the first combustion chamber 2 And an anode (fuel electrode) of a high-temperature fuel cell 5 installed in the second combustion chamber 4 through an inlet 3 provided between the first combustion chamber 4 and the second combustion chamber 4. At the introduction port 3, a high-temperature filter 8 is installed that absorbs trace impurities that adversely affect the operation of the fuel cell 5, such as hydrogen chloride and hydrogen sulfide. Further, a catalyst filter 9 that can reform the pyrolysis fluid fuel is further installed at the introduction port 3 (installed on the downstream side of the high temperature filter 8 in this example). The oxidizing gas is preheated and mixed from the outside directly or via the heat exchanger 6 and then introduced into the cathode (air electrode) of the high temperature fuel cell 5. The fuel cell 5 thus supplied with the fuel fluid on the anode side and the oxidizing gas on the cathode side generates power. In addition, the anode and the cathode are separated by a partition wall (separator) containing an electrolyte, and in the present embodiment, the pyrolysis fluid fuel generated in the first combustion chamber 2 can be used as a direct fuel without cooling. The solid oxide is used as the electrolyte. The operating temperature is 800 to 1000 ° C. although it depends on the material of the fuel cell.

  This is a temperature sufficient to decompose dioxins that may be generated by combustion. The fuel gas and the oxidant gas used in this way are discharged as exhaust gases from the fuel cell 5 and burned as they are in the second combustion chamber 4 to be used as heat sources for supplying heat to the boiler. .

  The exhaust gas that has finished burning in the second combustion chamber 4 heats (preheats) the oxidant gas via the heat exchanger 6 and then is released to the outside air via a chimney (not shown). The negative pressure generated at this time becomes part of the driving force for feeding the fuel fluid from the first combustion chamber 2 to the fuel cell 5.

  Further, a storage battery 10 is connected to the fuel cell 5, and surplus power is supplied to the storage battery 10 for charging.

  In this embodiment, the solid oxide fuel cell using a solid oxide as an electrolyte is described. Instead, a molten salt fuel having a high operating temperature (600 to 700 ° C.) is used instead. A battery can also be used.

  Next, the configuration of the fuel cell in the cogeneration system according to the present invention will be described below.

  As schematically shown in FIG. 2, the fuel cell 5 according to the present embodiment is interposed between an anode 5a as a fuel electrode, a cathode 5b as an air electrode, and an anode 5a and a cathode 5b. A unit cell 5u is composed of a separator 5c containing an electrolyte separating both of them and a rectangular frame-like support 50 for attaching and supporting them.

  In addition, a pair of substantially rectangular parallelepiped spacers 52 and 52 are formed integrally with the support 50 so as to extend along the opposite sides of the pair of opposing sides of the support 50.

  And the fuel cell 5 which concerns on this Embodiment is formed by laminating | stacking the several unit cell 5u in a predetermined lamination direction (in this example, an up-down direction).

  In the fuel cell 5 according to the present embodiment, adjacent unit cells 5u, 5u are arranged so that adjacent spacers 52, 52 are orthogonal to each other, and opposing electrodes are arranged between the unit cells 5u, 5u in the stacking direction. They are stacked so as to have the same polarity.

  That is, in the fuel cell 5 according to the present embodiment, the counter electrodes between the unit cells 5u and 5u adjacent in the stacking direction have the same polarity, and the spacers 52 and 52 allow the gaps between the adjacent unit cells 5u and 5u ( Channels) are formed, and the channels orthogonal to each other are alternately formed along the stacking direction by the gap.

  Thus, the pyrolysis fluid flow path and the preheated air flow path are reliably separated to supply the pyrolysis fluid Pa between the opposed anodes 5a, and the air flow (oxidant gas) between the opposed cathodes 5b. ) Pb can be supplied to improve the supply efficiency of the fluids Pa and Pb to the fuel electrode 5a and the air electrode 5b.

  In addition, by forming the flow paths to the fuel electrode 5a and the air electrode 5b so as to be orthogonal to each other, the pyrolysis fluid Pa from above the second combustion chamber 4 by the so-called downdraft method as illustrated in FIG. In the cogeneration system having the combustion chamber configuration in which the air flow Pb is supplied from the side of the second combustion chamber 4, the pyrolysis fluid Pa and the preheated air Pb are easily applied to the corresponding electrodes 5a and 5b. Therefore, the arrangement and accommodation of the fuel cell 5 in the second combustion chamber 4 can be easily realized.

  In the present embodiment, the configuration of the downdraft type combustion apparatus in which the second combustion chamber 4 is disposed below the first combustion chamber 2 is exemplified. However, the combustion apparatus to which the present invention can be applied is described above. For example, as schematically illustrated in FIG. 3, a partition wall W is provided in a substantially hollow rectangular parallelepiped combustion chamber, and a through hole is formed in a substantially central portion of the partition wall W. Thus, the second combustion chamber 4 may be partitioned and formed behind the first combustion chamber 2, and the fuel cell 5 may be disposed in the second combustion chamber 4.

<Embodiment 2>
Next, the configuration of the cogeneration system according to Embodiment 2 will be described with reference to FIGS. 4 and 5. Here, FIG. 4 is a system block diagram showing the biomass pyrolysis cogeneration system according to the second embodiment, and FIG. 5 is a schematic diagram for explaining the configuration of the fuel cell according to the second embodiment. .

  In the cogeneration system according to the present embodiment, the fuel cell 5 is disposed between the first combustion chamber 2 and the second combustion chamber 4, and a member having the same function as that of the previous embodiment. Are denoted by the same reference numerals, and detailed description thereof will be omitted.

  As schematically shown in FIG. 4, in the cogeneration system according to the present embodiment, a fuel cell 5 is interposed between the first combustion chamber 2 and the second combustion chamber 4, and the first combustion chamber 2 and the second combustion chamber 4 are connected to each other through a fuel cell 5.

  As schematically shown in FIG. 5, the fuel cell 5 according to the present embodiment is provided with a rectangular notch (slit) around the support 50 of the unit cell 5 u, and further, adjacent unit cells 5 u, Slit plates 50S, 50A, and 50B for forming pyrolytic fluid and air flow paths are sequentially interposed between 5u.

  Specifically, the introduction slit plate 50S is provided on the most upstream side (in this example, the uppermost portion in the figure), and the fuel slit plate 50A and the unit cell 5u are sequentially provided on the downstream side (lower side in the drawing). Then, the air slit plate 50B and the unit cell 5u are provided, and the fuel cell 5 is formed by repeatedly stacking the same combination set (the fuel slit plate 50A, the unit cell 5u, the air slit plate 50B, and the unit cell 5u). Has been.

  The introduction slit plate 50S has two substantially rectangular fuel ports 50a and 50a and two air ports 50b and 50b at the periphery thereof, and the pair of fuel ports 50a and 50a and the pair of air ports 50b and 50b. Are formed on opposite sides of the introduction slit plate 50S.

  The fuel slit plate 50A has similar air ports 50b and 50b, and a fuel supply port 53A is formed between the pair of air ports 50b and 50b.

  The air slit plate 50B has similar fuel ports 50a and 50a, and an air supply port 53B is formed between the pair of fuel ports 50a and 50a.

  In the unit cell 5u, the pair of fuel ports 50a and 50a and the pair of air ports 50b and 50b are formed around the support 50 in addition to the same cell configuration as in the previous embodiment.

  In the fuel cell 5 configured as described above, the fuel flow Pa and the air flow Pb supplied from the same direction correspond to the corresponding fuel ports 50a and 50a and the air ports 50b and 50b of the introduction slit plate 50S arranged on the most upstream side. Are respectively focused by passing through the fuel and guided to the fuel slit plate 50A on the downstream side. Here, the air flow Pb passes through the air ports 50b and 50b of the fuel slit plate 50A formed at positions corresponding to the air ports 50b and 50b of the introduction slit plate 50S. On the other hand, the fuel flow Pa is supplied to the fuel port 50a of the unit cell 5u provided on the downstream side by the fuel supply port 53A of the fuel slit plate 50A formed to the position corresponding to the fuel ports 50a, 50a of the introduction slit plate 50S. , 50a and the fuel electrode (anode) 5a. That is, the fuel flow Pa is supplied to the fuel electrode 5a of the unit cell 5u through the fuel supply port 53A of the fuel slit plate 50A.

  The fuel flow Pa that has passed through the fuel ports 50a, 50a of the unit cell 5u passes through the fuel ports 50a, 50a of the air slit plate 50B formed at a position corresponding to the fuel ports 50a, 50a of the unit cell 5u. On the other hand, the air flow Pb is generated by the air supply port 53B of the air slit plate 50B formed to the position corresponding to the air ports 50b and 50b of the unit cell 5u, and the air ports 50b and 50b of the unit cell 5u provided downstream. 50b and air electrode (cathode) 5b are dispersed. That is, the air flow Pb is supplied to the air electrode 5b of the unit cell 5u through the air supply port 53B of the air slit plate 50B. Thereafter, the corresponding fuel flow Pa and air flow Pb are supplied to the fuel electrodes 5a and the air electrodes 5b between the stacked unit cells 5u and 5u by the same action.

  That is, in the fuel cell 5 according to the present embodiment, the flow of the pyrolysis fluid Pa and the preheated air Pb supplied from the same direction is caused by the slit plates 50A and 50B interposed between the adjacent unit cells 5u and 5u. Then, the light is converged and dispersed sequentially and selectively supplied to the corresponding fuel electrode 5a and air electrode 5b. Accordingly, the first combustion chamber 2, the fuel cell 5, and the second combustion chamber 4 illustrated in FIG. 4 can be suitably applied to the configuration arranged in series.

  Also in the present embodiment, as in the previous embodiment, a high temperature filter 8 or a catalyst filter 9 may be provided on the upstream side (upper side in FIG. 4) of the fuel cell 5, or an air flow or the like A heat exchanger 6 for preheating may be provided.

  In the cogeneration system according to the present embodiment configured as described above, it is necessary to provide a separate storage space for the fuel cell 5 as compared with the previous embodiment. However, the operating environment of the fuel cell 5 is set to the combustion in the combustion chamber. The operating environment of the fuel cell 5 can be ensured more stably, independent of the environment, regardless of changes in the combustion state in the combustion chamber.

  As described above, according to the present invention, the pyrolysis fluid fuel obtained by partial combustion pyrolysis of fuel such as biomass in the first combustion chamber 2 is directly supplied to the fuel cell, and the first combustion chamber 2 The fuel combustion efficiency can be improved because the partial combustion at, the exhaust heat exhausted during operation of the fuel cell 5 and the combustion heat of the exhaust gas from the fuel cell 5 are used as the heat source of the boiler.

  Each embodiment mentioned above is an illustration to the last, and the present invention is not limited to this, and can be variously changed without departing from the meaning. For example, in the above-described embodiment, both the high temperature filter 8 and the catalyst filter 9 are provided in the inlet 3, but only one of the filters may be installed depending on the type of fuel.

1: two-combustion chamber type boiler, 2: first combustion chamber, 3: introduction port, 4: second combustion chamber, 5: fuel cell, 5a: anode (fuel electrode), 5b: cathode (air electrode), 5c: Separator, 5u: Unit cell, 6: Heat exchanger, 7: Fuel inlet, 8: High temperature filter, 9: Catalytic filter, 10: Storage battery, 12: Casing, 50: Support, 50S, 50A, 50B: Slit plate 50a: fuel port, 50b: air port, 52: spacer, 53A: fuel supply port, 53B: air supply port, Pa: pyrolysis fluid (fuel flow), Pb: preheated air (oxidizing gas), W: partition wall

Claims (17)

A two-combustion chamber type comprising a first combustion chamber that partially burns fuel to generate a pyrolysis fluid, and a second combustion chamber that re-combusts the pyrolysis fluid generated by the combustion in the first combustion chamber at a high temperature In the combustion device,
A combustion apparatus characterized in that the pyrolysis fluid generated in the first combustion chamber is introduced into the second combustion chamber via a fuel cell.   The combustion apparatus according to claim 1, wherein the fuel cell is disposed in the second combustion chamber.   The combustion apparatus according to claim 1, wherein the fuel cell is interposed between the first combustion chamber and the second combustion chamber.   The combustion apparatus according to any one of claims 1 to 3, wherein a high temperature filter is provided upstream of the fuel cell.   The combustion apparatus according to claim 4, wherein a catalyst filter is provided between the fuel cell and the high temperature filter.   2. The combustion chamber can be used as a fuel by mixing not only natural biomass such as wood and waste biomass such as municipal waste but also fossil fuel such as coal, alone or in an arbitrary ratio. The combustion apparatus in any one of 5 thru | or 5.   The combustion apparatus according to any one of claims 1 to 6, further comprising a heat exchanger having a function of mixing the exhaust gas discharged from the second combustion chamber with an oxidant such as air and performing heat exchange. .   The combustion apparatus according to any one of claims 1 to 7, further comprising a second combustion chamber in which exhaust gas from the high-temperature fuel cell is burned as it is and can be used as a heat source of a boiler.   The combustion apparatus according to claim 2, wherein the second combustion chamber is formed so as to be easily installed in the second combustion chamber of the fuel cell and taken out for maintenance. A two-combustion-chamber combustion apparatus having a first combustion chamber that partially burns fuel to generate a pyrolysis fluid, and a second combustion chamber that re-combusts the pyrolysis fluid generated by combustion in the first combustion chamber at a high temperature When,
A fuel cell using the pyrolysis fluid generated in the first combustion chamber as a fuel,
The first combustion chamber, the fuel cell, and the second combustion chamber are arranged and configured so that the pyrolysis fluid generated in the first combustion chamber is introduced into the second combustion chamber via the fuel cell. Cogeneration system characterized by   The cogeneration system according to claim 10, wherein the fuel cell is disposed in the second combustion chamber.   The cogeneration system according to claim 10, wherein the fuel cell is interposed between the first combustion chamber and the second combustion chamber.   The high-temperature gas generated in the first combustion chamber and impurities in the pyrolysis fluid are removed using a high-temperature filter and then sent to the second combustion chamber. Cogeneration system.   The cogeneration system according to any one of claims 10 to 13, wherein the high-temperature gas and pyrolysis fluid from which impurities have been removed are reformed using a catalyst filter and then introduced into the second combustion chamber.   15. The cogeneration system according to claim 10, wherein the fuel cell is a high-temperature type and has an electrolyte, an anode, and a cathode, and a solid oxide or a molten salt is used as the electrolyte.   The cogeneration system according to any one of claims 10 to 15, wherein the oxidant gas is supplied to the cathode of the fuel cell by a negative pressure in the second combustion chamber generated by the exhaust flow of the combustion apparatus exhaust gas.   11. The fuel fluid is supplied to the anode of the fuel cell by a pressure generated by partial combustion pyrolysis in the first combustion chamber and a negative pressure in the second combustion chamber generated by the exhaust gas exhaust gas flow. The cogeneration system according to any one of 16.

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