JP5260938B2 - Fuel cell device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel battery device capable of effectively processing an exhaust gas and miniaturizing. <P>SOLUTION: A fuel battery cell stack 12 wherein a plurality of fuel battery cells 10 are arranged in designated intervals is stored in a storage container 9 having a vent hole 25 for discharging the exhaust gas, and an exhaust gas processing device 26 for processing the exhaust gas discharged from the storage container 9 is arranged in the vent hole 25. The exhaust gas can be effectively processed since a heat exchanger 7 for thermally exchanging with the exhaust gas processed by the exhaust gas processing device 26 and water is connected with the vent hole 25, and the fuel battery device can be miniaturized. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an exhaust gas treatment device for treating exhaust gas generated by power generation of a fuel cell and a fuel cell device including a heat exchanger.

  2. Description of the Related Art In recent years, various fuel cell devices in which a fuel cell stack formed by arranging a plurality of fuel cells is accommodated in a storage container and its operation method (system) have been proposed as next-generation energy.

  In such a fuel cell apparatus, a reformer for reforming raw fuel such as natural gas into a hydrogen-containing gas is provided, and the hydrogen-containing gas and the oxygen-containing gas are supplied to the fuel cell. Then, power generation of the fuel battery cell is performed.

  By the way, when reforming a component contained in a raw fuel such as natural gas into a hydrogen-containing gas in a reformer, carbon monoxide as an impurity may be generated. Also, incomplete combustion during high-efficiency power generation (that is, operation at a high fuel utilization rate) or operation at a high air utilization rate during operation of the fuel cell device (during start-up processing, power generation, and stop processing) In some cases, exhaust gas containing carbon monoxide or the like may be generated.

  Therefore, in order to prevent exhaust gas containing harmful components such as carbon monoxide from being exhausted outside the fuel cell device, for example, a plurality of solid oxide fuel cells are housed in the housing and discharged from the fuel cells. There has been proposed a fuel cell including a purification device that purifies the combustion exhaust gas (see, for example, Patent Document 1).

On the other hand, a fuel cell device that includes a heat exchanger for exchanging heat between combustion exhaust gas and water and supplies condensed water generated by heat exchange to a reformer is also known (see, for example, Patent Document 2). .)
JP 2006-32291 A JP 2006-179386 A

  By the way, in processing the exhaust gas generated by the operation of the fuel cell device, the fuel cell device configured to connect the exhaust gas processing device to the outer surface of the storage container and connect the heat exchanger to the exhaust gas processing device. There was a problem that the apparatus was enlarged.

  In addition, since the exhaust gas treatment device is connected to the outer surface of the fuel cell module, there has been a problem that the temperature of the exhaust gas is lowered and the efficiency is poor when treating the exhaust gas generated by power generation of the fuel cell.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fuel cell device that can be miniaturized and can efficiently treat exhaust gas.

The fuel cell device of the present invention is to house the fuel cell stack formed by arranging at predetermined intervals a plurality of fuel cells to the exhaust hole made comprises a storage container for exhausting exhaust gas, before Symbol An exhaust gas treatment device for treating the exhaust gas exhausted from the storage container; and a heat exchanger for exchanging heat between the exhaust gas after being treated by the exhaust gas treatment device and water , the exhaust gas treatment device comprising: A honeycomb type combustion catalyst provided in the exhaust hole, wherein the heat exchanger is connected to the exhaust hole so as to be located outside the storage container .

  In such a fuel cell device, since the exhaust gas treatment device for treating the exhaust gas generated with the operation of the fuel cell device is provided in the exhaust hole provided in the storage container, the fuel cell device is It can be downsized.

  Moreover, since the exhaust gas treatment device is provided in the exhaust hole of the storage container, the exhaust gas having a high temperature can be treated by the exhaust gas treatment device, and the exhaust gas can be treated efficiently.

  Further, since the heat exchanger is connected to the exhaust hole, the exhaust gas exhausted from the exhaust hole is immediately supplied to the heat exchanger, and heat exchange can be performed efficiently.

Furthermore , since the exhaust gas treatment device is a honeycomb type combustion catalyst, exhaust gas can be treated efficiently and the fuel cell device can be made inexpensive.

In the fuel cell device of the present invention, it is preferable that a heat insulating material is provided in a gap between the outer peripheral surface of the honeycomb type combustion catalyst and the exhaust hole .

In such a fuel cell system, suppress the from the gap between the exhaust hole and the honeycomb combustion catalyst retract and the container, exhaust gas that has not been processed in a honeycomb-type combustion catalyst is discharged to the outside of the container can do.

  Furthermore, by providing a heat insulating material on the outer peripheral surface of the honeycomb type combustion catalyst, the heat retention effect of the combustion catalyst can be obtained, and the exhaust gas can be treated efficiently.

In the fuel cell device of the present invention, it is preferable that a fixing member for fixing the exhaust gas treatment device inside the exhaust hole is provided at or near the exhaust hole .

In such a fuel cell device, since a fixing member for fixing the exhaust gas treatment device inside the exhaust hole is provided at or near the exhaust hole , the exhaust gas treatment device is firmly fixed inside the exhaust hole. It is possible to prevent the exhaust gas treatment device from being detached or dropped during transportation of the fuel cell device.

  Further, in the fuel cell device of the present invention, the storage container has an exhaust gas by an inner wall for exhaust gas arranged at a predetermined interval with respect to an inner bottom surface and an inner side surface formed along the arrangement direction of the fuel cells. It is preferable that a flow path is formed, and the exhaust hole communicates with the exhaust gas flow path and is provided at the bottom of the storage container.

  In such a fuel cell apparatus, an exhaust gas flow path is formed by an inner wall for exhaust gas arranged in parallel at a predetermined interval with respect to the inner bottom surface and the inner side surface formed along the arrangement direction of the fuel cells. Since the hole communicates with the exhaust gas flow path and is provided at the bottom of the storage container, the heat exchanger can be connected to the bottom of the storage container, and the fuel cell device can be made compact.

The fuel cell device of the present invention is to house the fuel cell stack formed by arranging at predetermined intervals a plurality of fuel cells to the exhaust hole made comprises a storage container for exhausting exhaust gas, before Symbol An exhaust gas treatment device for treating the exhaust gas exhausted from the storage container; and a heat exchanger for exchanging heat between the exhaust gas after being treated by the exhaust gas treatment device and water , the exhaust gas treatment device comprising: The honeycomb type combustion catalyst provided in the exhaust hole, and the heat exchanger is connected to the exhaust hole so as to be located outside the storage container, thereby reducing the size of the fuel cell device In addition, it is possible to efficiently treat exhaust gas generated by power generation of the fuel cell.

  FIG. 1 is a side view schematically showing a fuel cell device 1 according to the present invention, in which a part of a side part constituting an outer case is removed so that the inside of the outer case can be seen. In the following drawings, the same numbers are assigned to the same members.

  In FIG. 1, a fuel cell device 1 has a partition member 3 in an exterior case 2, and a fuel cell module housing in which a fuel cell module 4 (hereinafter sometimes referred to as a module) is disposed on the partition member 3. A chamber 5 (hereinafter abbreviated as a module storage chamber) is formed. Further, an auxiliary machine for storing auxiliary equipment (only a blower for supplying air to the module 4 is shown in FIG. 1) necessary for operating the module 4 below the partition member 3. A storage chamber 6 is formed. The partition member 3 only needs to partition the module storage chamber 5 and the accessory storage chamber 6, and the module storage chamber 5 and the accessory storage chamber 6 may be partitioned with a gap.

  Further, for example, the outer casing 2 is divided into left and right by a partition member 3, and one is a fuel cell module housing chamber 5 for housing a module 4, and the other is an auxiliary machinery housing chamber 6 for storing auxiliary machinery. It can also be.

  In addition, the fuel cell apparatus 1 can be made into a compact shape by using the partition member 3 as shown in FIG.

  In FIG. 1, a heat exchanger 8 for exchanging heat between the exhaust gas exhausted from the module 4 (exhaust gas after being processed by an exhaust gas treatment device described later) and water is connected to the bottom surface of the module 4. ing. Details of the connection between the module 4 and the heat exchanger 8 will be described later.

  In addition, although the example which provided the heat insulating material 8 in the bottom face of the module 4 is shown in FIG. 1, in order to insulate the radiant heat of the module 4 more effectively, the heat insulating material 8 is arrange | positioned so that the whole surface of the module 4 may be covered. It is preferable to do.

  FIG. 2 is an external perspective view showing the module 4 shown in FIG. The module 4 is arranged in a rectangular parallelepiped storage container 9 with a plurality of fuel cells 10 standing at predetermined intervals, and a current collecting member (not shown) is disposed between adjacent fuel cells 10. ), And a fuel cell stack 12 (hereinafter referred to as a fuel cell stack 12) that is fixed to the manifold 11 with an insulating bonding material (not shown) such as a glass sealing material. It may be called a cell stack.) In FIG. 2, the fuel battery cell 10 is a hollow flat plate type having a gas flow path through which gas flows and a gas flow through the gas flow path in the longitudinal direction. A solid oxide fuel cell 10 in which an electrode, a solid electrolyte, and an oxygen side electrode are sequentially provided is illustrated.

  In addition, in order to obtain a hydrogen-containing gas used in the fuel battery cell 10, a reformer 13 for reforming a fuel such as natural gas or kerosene to generate a fuel gas (hydrogen-containing gas) is provided in the cell stack 12. Arranged at the top of the. The fuel gas generated by the reformer 13 is supplied to the manifold 11 through the gas flow pipe 14 and is supplied to the gas flow path provided inside the fuel cell 10 through the manifold 11. And the fuel cell stack apparatus 15 is comprised by these structures.

  FIG. 2 shows a state in which a part (front and rear surfaces) of the storage container 9 is removed and the fuel cell stack device 15 stored inside is taken out rearward. Here, in the module 4 shown in FIG. 2, the fuel cell stack device 15 can be slid and stored in the storage container 9.

  FIG. 3 is a cross-sectional view of the module 4 shown in FIG. 2. FIG. 4 is a schematic diagram illustrating the connection between the module 4 shown in FIG. 3 and the exhaust gas treatment device 26 and the heat exchanger 7. It is the front view which extracted and showed the exhaust gas processing apparatus 26 and the heat exchanger 7. FIG. First, the module 4 will be described with reference to FIG.

  The storage container 9 constituting the module 4 has a double structure having an inner wall 16 and an outer wall 17, and an outer frame of the storage container 9 is formed by the outer wall 17, and the cell stack 12 (fuel cell stack device 15 is formed by the inner wall 16. ) Is formed.

  Further, in the module 4, a reaction gas flow path introduced into the fuel cell 10 is formed between the inner wall 16 and the outer wall 17. For example, an oxygen-containing gas introduced into the fuel cell 10 flows.

  Here, the inner wall 16 extends from the upper surface of the inner wall 16 to the side surface side of the cell stack 12, corresponds to the width in the arrangement direction of the cell stack 12, and leads to a flow path formed by the inner wall 16 and the outer wall 17. A reaction gas introduction member 19 for introducing a reaction gas into the cell stack 12 is provided. In addition, on the lower end side of the reaction gas introduction member 19 (lower end side of the fuel cell 10), a blower outlet 20 for introducing the reaction gas into the fuel cell 10 is provided.

  In FIG. 3, the reaction gas introduction member 19 is formed by forming a reaction gas introduction flow path by a pair of plate members arranged in parallel at a predetermined interval and joining the bottom member on the lower end side. In FIG. 3, the reaction gas introduction member 19 is disposed so as to be positioned between two cell stacks 12 (fuel cell stack device 15) juxtaposed inside the storage container 9. The reactive gas introduction member 19 may be disposed so as to be sandwiched from, for example, both side surfaces of the cell stack 12 depending on the number of cell stacks 12 accommodated.

  The temperature sensor 21 is inserted into the reaction gas introduction member 19 from the upper surface side of the storage container 9 so that the temperature measuring unit 22 of the temperature sensor 21 is located. For example, a thermocouple can be used as the temperature sensor 21.

  Here, since the fuel battery cell 10 is operated in a predetermined temperature range, it is necessary to measure the temperature in the power generation chamber 18 (preferably the cell stack 12 or the vicinity thereof) and perform temperature management thereof. In particular, when the fuel cell 10 is a solid oxide fuel cell 10, its operating temperature is very high, and if the temperature of the fuel cell 10 (cell stack 12) rises excessively, the amount of power generation decreases. Furthermore, since there is a possibility that the fuel cell 10 (cell stack 12) may be damaged due to deterioration or thermal stress, it is particularly necessary to effectively measure the temperature in the vicinity of the cell stack 10 and to manage the temperature. It becomes. Therefore, the temperature sensor 21 is positioned at the center side where the temperature measuring unit 22 reaches the highest temperature of the cell stack 12 (the center portion in the arrangement direction of the cell stack 12 and the center portion in the longitudinal direction of the fuel cell 10). It is preferable to arrange so that the portion to be measured can be measured.

  Further, in the power generation chamber 18, the temperature in the module 4 is maintained at a high temperature so that the heat in the module 4 is extremely dissipated and the temperature of the fuel cell 10 (cell stack 12) is lowered and the power generation amount is not reduced. The heat insulating material 23 for doing is provided suitably.

  Here, in order to maintain the temperature of the fuel cell 10 (cell stack 12) at a high temperature, it is preferable to arrange the heat insulating material 23 in the vicinity of the cell stack 12, particularly along the arrangement direction of the fuel cells 10. It is preferable to arrange the heat insulating material 23 in parallel with the side surface side of the cell stack 12 and to have a size equal to or larger than the outer shape of the side surface of the cell stack 12. In addition, it is preferable that the cell stacks 12 are arranged side by side. Thereby, it can suppress effectively that the temperature of the cell stack 12 falls.

  Further, by providing a heat insulating material 23 having a size equal to or larger than the outer shape of the side surface of the cell stack 12 on the side surface side of the cell stack 12, the gas supplied from the reaction gas introduction member 19 can be supplied to the cell stack 12. It is possible to suppress the discharge from the side surface of the fuel cell and promote the flow of the reaction gas between the fuel cells 10 constituting the cell stack 12.

  In addition, it is preferable to have a notch for supplying the reaction gas to the fuel cell 10 on the lower end side of the heat insulating material 23 arranged on the reaction gas introduction member 19 side.

  Further, the exhaust gas flow is caused by the exhaust gas inner wall 24 provided at a predetermined interval with respect to the bottom surface (inner bottom surface) formed by the inner wall 16 and the side surface (inner side surface) formed along the arrangement direction of the fuel cells 10. A passage is formed, and an exhaust hole 25 provided in the bottom of the storage container 9 and an exhaust gas passage communicate with each other.

  Thereby, the exhaust gas generated with the operation of the fuel cell device 1 (during start-up processing, power generation, and stop processing) flows through the exhaust gas passage and is then exhausted from the exhaust hole 25.

  The exhaust hole 25 may be formed by cutting out a part of the bottom of the storage container 9, or may be formed by providing a tubular member.

  Then, as shown in FIG. 4, the exhaust gas exhausted from the exhaust hole 25 is processed by an exhaust gas processing means 26 described later, and then supplied to the heat exchanger 7 that exchanges heat between the processed exhaust gas and water. Then, heat exchange is performed. And by providing the exhaust hole 25 in the bottom of the storage container 9, the heat exchanger 7 can be connected to the bottom (bottom surface) of the storage container 9, and the fuel cell apparatus 1 can be made compact.

  In FIG. 4 (FIG. 1), a plate fin type heat exchanger is illustrated as the heat exchanger 7.

  Here, in the plate fin type heat exchanger 7, the water flows from the bottom to the top in the water flow path provided in the lower side of the side surface (the surface other than the surface on which the plates are laminated) of the heat exchanger 7. A water introduction part 27 is provided to flow, and a post-heat exchange water supply part 28 is provided on the upper side of the side surface of the heat exchanger 7. A water supply pipe (not shown) is connected to each of the water introduction part 27 and the post-heat exchange water supply part 28, and water (hot water) after heat exchange is connected to a hot water storage tank provided outside the fuel cell device. ) Will be stored.

  In FIG. 4, the water supply unit 28 after heat exchange overlaps with the heat insulating material 8 provided on the outer peripheral surface (particularly the bottom) of the module 4 in a cross-sectional view (that is, a region surrounded by the heat insulating material 28). In this case, the water supply pipe connected to the post-heat exchange water supply unit 28 is arranged by cutting out a part of the heat insulating material 8 provided on the bottom surface of the module 4. Therefore, when connecting the heat exchanger 7 to the exhaust hole 25, it is preferable to arrange the post-heat exchange water supply unit 28 in a region where it does not overlap in the sectional view. Therefore, in some cases, the exhaust hole 25 and the heat exchanger 7 may be connected between the exhaust hole 25 and the heat exchanger 7 via a connecting member.

  A gas-liquid separation member 29 for separating condensed water generated by heat exchange between the treated exhaust gas and water and the exhaust gas after heat exchange is provided below the heat exchanger 7. The exhaust gas after the heat exchange can be exhausted in the side surface direction of the heat exchanger 7, and the condensed water can be drained downward in the heat exchanger 7.

  And after processing the condensed water (condensed water isolate | separated by the gas-liquid separation member 29) produced by the heat exchange in the heat exchanger 7 with a water treatment apparatus etc. (not shown), it is made into the reformer 13. By supplying the fuel cell device, the power generation efficiency can be improved. Note that the structure of the gas-liquid separation member 29 can be appropriately adjusted depending on the structure of the fuel cell device 1.

  By the way, the exhaust gas generated by the operation of the fuel cell device 1 may contain harmful components such as carbon monoxide, and the exhaust gas treatment is performed so that the exhaust gas containing these harmful components is not exhausted outside the fuel cell device 1. After processing in the apparatus, it is necessary to exhaust outside.

  Here, in the fuel cell device 1 configured to connect the exhaust gas treatment device to the outer surface (bottom surface or the like) of the module 4 (storage container 9) and connect the heat exchanger 7 to the exhaust gas treatment device, the fuel cell device 1 is There is a problem of increasing the size. Further, since the exhaust gas treatment device is connected to the outer surface of the module 4 (storage container 9), the exhaust gas temperature supplied to the exhaust gas treatment device is lowered, and there is a risk that efficiency is deteriorated when the exhaust gas is treated.

  Therefore, as shown in FIGS. 3 and 4, in the fuel cell device 1 of the present invention, the exhaust gas treatment device 26 is provided in the exhaust hole 25 for exhausting the exhaust gas in the module 4 (storage container 9). It is characterized by.

  In such a fuel cell device 1, the exhaust gas treatment device 26 is provided in the exhaust hole 25, and the heat exchanger 7 is connected to the exhaust hole 25, so that the fuel cell device 1 can be downsized.

  In addition, since the exhaust gas treatment device 26 is provided in the exhaust hole 25, the exhaust gas having a high temperature is supplied to the exhaust gas treatment device 26, and the exhaust gas can be efficiently processed.

  The exhaust gas treatment device 26 provided in the exhaust hole 25 is preferably a generally known honeycomb type combustion catalyst (hereinafter abbreviated as a honeycomb catalyst). Thereby, it is possible to efficiently treat the exhaust gas and to reduce the cost. As the honeycomb catalyst, a honeycomb catalyst made of ceramics, a metal honeycomb catalyst (metal honeycomb catalyst), or the like can be appropriately used depending on the temperature of the exhaust gas. It is preferable to use a catalyst. In the following description, it is assumed that a honeycomb catalyst is used as the exhaust gas treatment device 26, and the description is given with the same reference numerals.

  By the way, when the honeycomb catalyst 26 is provided in the exhaust hole 25, if a gap is formed between the exhaust hole 25 and the honeycomb catalyst 26, the exhaust gas not treated by the honeycomb catalyst 26 is exhausted to the outside of the storage container 9 (module 4). There is a risk of being. Further, the heat in the module 4 is radiated to the outside through the gap between the exhaust hole 25 and the honeycomb catalyst 26, and the temperature in the module 4 may be lowered.

  Therefore, it is preferable to provide a heat insulating material (not shown) on the outer peripheral surface of the honeycomb catalyst 26. Thereby, it is possible to suppress a gap between the exhaust hole 25 and the honeycomb catalyst 26, and it is possible to suppress exhaust gas that has not been treated by the honeycomb catalyst 26 from being exhausted to the outside of the storage container 9. Furthermore, by providing a heat insulating material on the outer peripheral surface of the honeycomb catalyst 26, it is possible to suppress the temperature in the module 4 from decreasing.

  Furthermore, by providing a heat insulating material on the outer peripheral surface of the honeycomb catalyst 26, the heat retention effect of the honeycomb catalyst 26 can be obtained, and the exhaust gas can be treated efficiently.

  In addition, as the heat insulating material provided on the outer peripheral surface of the honeycomb catalyst 26, for example, a shape obtained by cutting out the shape of the honeycomb catalyst 26 from a plate-shaped heat insulating material or a wool-like heat insulating material can be used. In order to suppress the formation of a gap between the exhaust hole 25 and the honeycomb catalyst 26, it is preferable to use a wool-like heat insulating material.

  By the way, by providing a heat insulating material on the outer peripheral surface of the honeycomb catalyst 26, when the fuel cell device 1 is in operation (for example, when installed in a house as a home fuel cell device, etc.). Although the honeycomb catalyst 26 is provided in the exhaust hole 25, for example, when it is transported by a truck or the like, the honeycomb catalyst 26 may be detached (dropped) due to vibration during transportation. Therefore, in the present invention, it is preferable to further include a fixing member for fixing the honeycomb catalyst (exhaust gas treatment device) 26.

  FIG. 5 shows an example in which the fixing member 30 is provided on the bottom surface (outer surface side) of the module 4 (storage container 9), and FIG. 6 is a perspective view showing the honeycomb catalyst 26 and the fixing member 30 extracted. It is. In FIG. 6, a part of the honeycomb catalyst 26 is omitted.

  Here, by providing the fixing member 30 on the bottom surface of the module 4 (storage container 9), it is possible to suppress (prevent) the honeycomb catalyst 26 from coming out of the exhaust hole 25 due to vibration during transportation.

  By the way, the fixing member 30 needs to efficiently distribute the exhaust gas after being treated by the honeycomb catalyst 26 to the heat exchanger 7. Therefore, in the fixing member 30 shown in FIG. 6, an example is shown in which a part of the plate-like member 31 is cut out to form a hollow portion, and a cross-shaped holding member 32 is provided in the hollow portion.

  Thereby, the exhaust gas after being treated with the honeycomb catalyst 26 can smoothly flow through the hollow portion of the plate-like member 31, and the treated exhaust gas can smoothly flow into the heat exchanger 7.

  The size (area) of the hollow portion provided in the plate-like member 31 is preferably at least the same size (area) as the bottom surface of the honeycomb catalyst 26 or larger (area). Thereby, the exhaust gas after being treated with the honeycomb catalyst 26 can smoothly flow to the heat exchanger 7.

  In addition, in FIG. 6, although the example which provided the cross-shaped holding member 32 in the cavity part of the plate-shaped member 31 was shown, the flow of the exhaust gas after processing with the honeycomb catalyst 26 does not receive resistance, Alternatively, a holding member 31 having a different shape can be used as long as it receives a slight resistance. For example, a mesh-like holding member 31 can be used.

  FIG. 7 shows an example in which the fixing member 33 is provided below the honeycomb catalyst 26 provided in the exhaust hole 25, and FIG. 8 is a perspective view of the fixing member 33.

  For example, when the honeycomb catalyst 26 is shorter than the exhaust holes 25 in the height direction, the fixing member 33 can be provided below the honeycomb catalyst 26 in the exhaust holes 25. Thereby, it can suppress that the module 4 enlarges.

  Here, FIG. 8 shows an example of the fixing member 33 for connecting to the exhaust hole 25 when the exhaust hole 25 is cylindrical, and the upper side of the conical member is cut in parallel to the bottom surface. Shape. The fixing member having such a shape can be formed, for example, by joining the end portions of the plate-like member 34 having different upper and lower lengths.

  Thereby, since the inside of the fixing member 33 has a hollow shape, the exhaust gas after being treated with the honeycomb catalyst 26 flows through the inside of the fixing member 33 and is supplied to the heat exchanger 7. In this case, it is preferable that the upper surface side of the fixing member 33 has a size that can be inserted into the exhaust hole 25, and it is preferable that the fixing member 33 has a size that is substantially the same as the exhaust hole 25.

  A holding member 35 is formed on the upper surface side of the fixing member 33. Accordingly, it is possible to suppress (prevent) the honeycomb catalyst 26 from being detached (dropped) due to vibrations or the like during transportation of the fuel cell device 1. The holding member 35 may be a holding member 31 having a different shape as long as the flow of the exhaust gas after being treated with the honeycomb catalyst 26 is not subjected to resistance or is subjected to slight resistance. For example, the holding member 35 may have a mesh shape or a cross shape.

  The plate-like member 34 is preferably provided with a slit 36 from the bottom surface side. Thus, when the fixing member 33 is inserted into the exhaust hole 25, the fixing member 33 is firmly fixed.

  Accordingly, it is possible to suppress (prevent) the honeycomb catalyst 26 from being detached (dropped) due to vibrations or the like during transportation of the fuel cell device 1.

  Although the present invention has been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and improvements can be made without departing from the scope of the present invention.

  For example, a fastening member can be provided on the upper side of the exhaust hole 25 so that the honeycomb catalyst 26 can be fixed at a predetermined position. Thereby, the exhaust gas generated by the power generation of the fuel cell 10 can be efficiently processed.

It is the schematic which shows an example of the fuel cell apparatus of this invention. It is the external appearance perspective view which extracted and showed the fuel cell module in the fuel cell apparatus of this invention. It is sectional drawing of the fuel cell module in the fuel cell apparatus of this invention. It is the front view which extracted a part of fuel cell device of the present invention which shows connection with exhaust gas processing means and a heat exchanger. It is sectional drawing of the fuel cell module which provided the fixing member in the bottom face of the fuel cell module shown in FIG. It is a perspective view which extracts and shows an exhaust gas processing apparatus and a fixing member. It is sectional drawing of the fuel cell module which connected the fixing member to the exhaust hole. It is the perspective view which showed another example of the fixing member.

Explanation of symbols

1: Fuel cell device 4: Fuel cell module 7: Heat exchanger 9: Storage container 10: Fuel cell 13: Reformer 25: Exhaust hole 26: Exhaust gas treatment device (honeycomb catalyst)
30, 33: Fixing member

Claims (5)

As well as housing the fuel cell stack formed by arranging at predetermined intervals a plurality of fuel cells to the exhaust hole made comprises a storage container for exhausting exhaust gas, the exhaust gas discharged from the pre-SL container An exhaust gas treatment device for treatment, and a heat exchanger for exchanging heat between the exhaust gas treated with the exhaust gas treatment device and water, and the exhaust gas treatment device is provided in the exhaust hole. A fuel cell device , wherein the heat exchanger is connected to the exhaust hole so as to be located outside the storage container . The heat exchanger has a post-heat exchange water supply part for storing water after heat exchange outside the fuel cell device, and the post-heat exchange water supply part is a cross section along the exhaust direction in the exhaust hole. 2. The fuel cell device according to claim 1, wherein the fuel cell device is disposed in a region that does not overlap with a heat insulating material provided on a surface where the exhaust hole of the storage container is located . The fuel cell system according to claim 1 or 2, characterized in that the heat insulating material is provided in a gap between the exhaust hole and the outer peripheral surface of the combustion catalyst. The fuel cell according to any one of claims 1 to 3, wherein a fixing member for fixing the exhaust gas treatment device inside the exhaust hole is provided at or near the exhaust hole .   The storage container has an exhaust gas flow path formed by an inner wall for exhaust gas arranged in parallel with a predetermined interval with respect to an inner bottom surface and an inner side surface formed along the arrangement direction of the fuel cells. The fuel cell device according to claim 1, wherein the hole communicates with the exhaust gas flow path and is provided at a bottom of the storage container.

Images