JP2020098804A - Solid oxide fuel cell device - Google Patents

Abstract

To provide a solid state oxide fuel cell device in which weight reduction is made without increasing the number of components, and without causing increase in the assembly man hours.SOLUTION: A solid state oxide fuel cell device (1) has a box type module case (8), multiple tabular heat insulating materials (7) arranged to surround the module case, and multiple fixing members (6b-6i) arranged along the edge lines formed by respective heat insulating materials so that they are held, respectively. The heat insulating material is covered by a shape holding sheet, and provided with insertion ports (188, 192) for passing through components (190, 194) extending from the module case to the outside of the heat insulating material. The fixing member is a member of substantially L-shaped cross section attached to cover the marginal part of two heat insulating materials in contact, and at least one fixing member includes extensions for opening (198, 199)extending to close the insertion port.SELECTED DRAWING: Figure 9

Description

TECHNICAL FIELD The present invention relates to a solid oxide fuel cell device, and more particularly to a solid oxide fuel cell including a plurality of fuel battery cells that generate electricity using a fuel gas and an oxidant gas.

A solid oxide fuel cell device (hereinafter also referred to as “SOFC”) uses an oxide ion conductive solid electrolyte as an electrolyte, has electrodes on both sides thereof, and supplies fuel gas to one side thereof. A fuel cell that operates at a relatively high temperature by supplying an oxidant gas (air, oxygen, etc.) to the other side.

Since a solid oxide fuel cell device operates at a much higher temperature than a solid polymer fuel cell or the like, it is necessary to cover the module case accommodating the fuel battery cell with a heat insulating material. If the amount of heat dissipated from the module case is large, a large amount of fuel is consumed to maintain the operating temperature, resulting in a decrease in overall energy efficiency. In the fuel cell system described in JP-A-2014-191972 (Patent Document 1), a heat insulating material using fumed silica is arranged so as to surround the entire module case to enhance the heat insulating performance of the module case.

However, since the heat insulating material made of fumed silica is easily damaged, in the invention described in Patent Document 1, the entire module case covered with the heat insulating material is housed in a metal housing to protect the heat insulating material and Prevents material damage. For this reason, the fuel cells are doubly covered with the metal container, which increases the weight of the fuel cell module and increases the cost.

JP, 2014-191972, A

On the other hand, a panel type heat insulating material is known. This panel-type heat insulating material is a block-shaped heat insulating material coated with a glass fiber sheet, and can maintain a plate-like shape by itself. Further, since the panel-type heat insulating material is relatively hard to break, it is not necessary to cover the heat insulating material from the outside with a metal housing, which may reduce the weight of the fuel cell module and reduce the cost.

However, in the module case, it is necessary to connect a pipe for fuel supply, an exhaust pipe, wiring for taking out signals of various sensors, etc. from the outside, and these need to be inserted so as to penetrate the heat insulating material. is there. The piping extending from the module case can be drawn to the outside without significantly dissipating heat by providing an opening in the heat insulating material so as to penetrate the piping. On the other hand, for sensors etc. that are inserted from the outside after the heat insulating material is mounted and arranged, after the sensors etc. are arranged inside the heat insulating material through the openings provided in the heat insulating material, only the wiring material extending from the sensor It is pulled out to the outside through the opening. Therefore, a large gap is formed between the heat insulating material and the wiring material extending through the heat insulating material. However, if the gap is left, heat is dissipated from the gap and energy efficiency is lowered.

To prevent this, it is necessary to attach a metal plate or the like for closing the gap. However, if a metal plate is attached in order to close the gaps of the insertion holes through which the wiring etc. pass, the number of parts will increase significantly and the man-hours for assembling the fuel cell module will also increase, so the panel type heat insulating material was adopted. You cannot take full advantage of the benefits. Further, some parts such as sensors inserted from the outside through the heat insulating material are not fixed to the module case side and may be dropped out only by being inserted into the heat insulating material. When such a component is mounted, some fixing member is required if the outer housing is omitted. In addition, although a cotton-like heat insulating material or the like may be filled in the gap of the insertion port to close the gap, some member needs to be attached separately to prevent the heat insulating material filled in the gap from falling off.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a solid oxide fuel cell device having a reduced weight without increasing the number of parts and the number of assembling steps.

The present invention is a solid oxide fuel cell device including a fuel battery cell that generates electricity using a fuel gas and an oxidant gas, and is a box-shaped module case and is arranged so as to surround the periphery of the module case. A plurality of plate-shaped heat insulating materials, and a plurality of fixing members arranged along the ridge line formed by each heat insulating material surrounding the module case so that each heat insulating material is held around the module case, And the heat insulating material is covered with a shape-retaining sheet so that the plate-like shape thereof is held, and an insertion port for passing a penetrating component extending from the module case to the outside of the heat insulating material is provided, The fixing member is a member having a substantially L-shaped cross-section mounted so as to cover the edges of the two heat insulating materials in contact with each other, and at least one of the fixing members extends so as to close the insertion port. It is characterized in that it is provided with an extension portion for closing.

According to the present invention thus configured, the plate-shaped heat insulating material arranged around the module case is not entirely covered with the metal plate or the like, but along the ridge line formed by the heat insulating material. The solid oxide fuel cell device can be reduced in weight because it is held by the arranged fixing member having a substantially L-shaped cross section. However, various penetrating parts such as a fuel gas supply pipe and various sensors project from the module case, and it is necessary to draw them out of the heat insulating material. Therefore, although it is necessary to provide the heat insulating material with an insertion port for passing these penetrating parts, some of the inserting ports need to be closed after the penetrating part is pulled out. However, if a metal plate or the like for closing the insertion port is attached as a dedicated member, the number of parts is significantly increased and the man-hours for assembling the solid oxide fuel cell device are increased, leading to an increase in cost. According to the present invention configured as described above, the fixing member that holds the heat insulating material is provided with the plugging extension portion, which closes the insertion opening, so that it is dedicated to closing the insertion opening. It becomes possible to omit parts. This can prevent a large increase in the number of parts and an increase in the number of assembly steps.

In the present invention, preferably, the plug extension portion is a U-shaped portion extending so as to connect both end portions of the fixing member.
According to the present invention thus configured, since the plugging-out extending portion is formed as a U-shaped portion extending so as to connect both ends of the fixing member, the insertion opening to be closed is fixed. Even when the member is located far from the ridgeline where the member is arranged, the insertion port can be reliably closed.

In the present invention, preferably, the plug extension portion is formed in a size and shape that exposes a penetrating component extending through the covering insertion opening to the outside.
If a fixing member for holding the heat insulating material is provided with an extension portion for closing, thereby blocking the insertion hole together with fixing the heat insulating material, forget to attach the penetrating part that should be attached before closing the insertion hole. It is expected that mistakes will occur. If such mistakes are overlooked and the process proceeds to the next step, it becomes difficult to attach the penetrating component that has been forgotten to be attached later, resulting in a large loss of assembly work time. According to the present invention configured as described above, since the extension portion for closure is configured to have a size and shape in which the penetrating component is exposed to the outside, such an error can be easily found. It is possible to suppress the loss of assembly work time.

According to the present invention, it is possible to provide a lightweight solid oxide fuel cell device without increasing the number of parts and the number of assembling steps.

1 is an overall configuration diagram showing a solid oxide fuel cell device (SOFC) according to an embodiment of the present invention. FIG. 3 is a side sectional view showing a fuel cell module of a solid oxide fuel cell device according to an embodiment of the present invention. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is an exploded perspective view of a module case and an air passage cover. FIG. 3 is a partial cross-sectional view showing a fuel cell unit of a solid oxide fuel cell according to an embodiment of the present invention. 1 is a perspective view showing a fuel cell stack of a solid oxide fuel cell according to an embodiment of the present invention. It is a perspective sectional view showing a state where the module case is surrounded by a plate-shaped heat insulating material. It is a perspective view showing the state where the plate-shaped heat insulating material is fixed by a part of the fixing members. It is a perspective view showing the state where the plate-shaped heat insulating material is fixed by all the fixing members.

Next, a solid oxide fuel cell device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is an overall configuration diagram showing a solid oxide fuel cell device (SOFC) according to an embodiment of the present invention.
As shown in FIG. 1, a solid oxide fuel cell device (SOFC) 1 according to an embodiment of the present invention includes a fuel cell module 2 and an auxiliary unit 4.

The fuel cell module 2 includes a module case 8 made of metal, and the periphery of the module case 8 is surrounded by a plurality of plate-shaped heat insulating materials 7. The plurality of plate-shaped heat insulating materials 7 are held around the module case 8 by a fixing member (not shown in FIG. 1) attached to the outside of each heat insulating material 7. In the power generation chamber 10 that is the lower portion of the module case 8 that is the closed space, a fuel cell that performs a power generation reaction with a fuel gas and an oxidant gas (hereinafter appropriately referred to as "power generating air" or "air"). The cell aggregate 12 is arranged. The fuel battery cell assembly 12 includes eight fuel battery cell stacks 14 (details will be described later with reference to FIG. 6), and each of the fuel battery cell stacks 14 includes 16 fuel battery cells. The cell unit 16 (details will be described later with reference to FIG. 5) is configured. In this example, the fuel battery cell assembly 12 has 128 fuel battery cell units 16. In the fuel cell assembly 12, all of the plurality of fuel cell units 16 are connected in series.

A combustion chamber 18 as a combustor is formed above the power generation chamber 10 of the module case 8 of the fuel cell module 2, and in this combustion chamber 18, the residual fuel gas (off gas) and the residual fuel gas not used for power generation reaction Is combusted with the air to generate exhaust gas (in other words, combustion gas). Further, the module case 8 is covered with the heat insulating material 7 to prevent the heat inside the fuel cell module 2 from radiating to the outside air. A reformer 120 that reforms the raw fuel gas (raw material gas) is arranged above the combustion chamber 18, and the reformer 120 has a temperature at which the reforming reaction can be performed by the combustion heat of the residual gas. Is heating up.

Further, an evaporator 140 is provided in the heat insulating material 7 above the module case 8 in the housing 6. The evaporator 140 evaporates water to generate water vapor by exchanging heat between the supplied water and exhaust gas, and a mixed gas of the water vapor and the raw fuel gas (hereinafter referred to as “fuel gas”). Is also referred to as “.” is supplied to the reformer 120 in the module case 8.

Next, the auxiliary device unit 4 adjusts the flow rate of water supplied from the pure water tank 26 which stores the water that has condensed the water contained in the exhaust gas from the fuel cell module 2 and uses it as pure water by the filter. A water flow rate adjusting unit 28 (such as a “water pump” driven by a motor) is provided. In addition, the accessory unit 4 adjusts the flow rate of the fuel gas, a gas shutoff valve 32 that shuts off the fuel supplied from the fuel supply source 30 such as city gas, a desulfurizer 36 that removes sulfur from the fuel gas. A fuel flow rate adjusting unit 38 (a "fuel pump" driven by a motor) and a valve 39 for shutting off the fuel gas flowing out from the fuel flow rate adjusting unit 38 when the power source is lost. Further, the accessory unit 4 includes a solenoid valve 42 that shuts off the air supplied from the air supply source 40, a reforming air flow rate adjusting unit 44 and a power generation air flow rate adjusting unit 45 that adjust the flow rate of the air. Driven "air blower"), a first heater 46 for heating the reforming air supplied to the reformer 120, and a second heater 48 for heating the power generating air supplied to the power generation chamber. I have it. The first heater 46 and the second heater 48 are provided in order to efficiently raise the temperature at startup, but they may be omitted.

In the present embodiment, the partial oxidation reforming reaction (POX) and the steam reforming reaction (SR) start from the POX step in which only the partial oxidation reforming reaction (POX) occurs in the reformer 120 when the apparatus is started. The SR process in which only the steam reforming reaction occurs may be performed through the ATR process in which the mixed auto-thermal reforming reaction (ATR) occurs, or the POX process can be omitted to change from the ATR process to the SR process. It may be configured to be transferred, or the POX process and the ATR process may be omitted and only the SR process may be performed. It should be noted that the reforming air flow rate adjusting unit 44 is not necessary in the configuration in which only the SR process is performed.

Next, to the fuel cell module 2, a hot water producing device 50 to which exhaust gas is supplied is connected. The hot water producing device 50 is supplied with tap water from a water supply source 24, and the tap water becomes hot water by the heat of exhaust gas and is supplied to a hot water storage tank of an external water heater (not shown). Further, the fuel cell module 2 is provided with a control box 52 for controlling the supply amount of fuel gas and the like. Further, the fuel cell module 2 is connected to an inverter 54 that is a power extraction unit (power conversion unit) for supplying the power generated by the fuel cell module to the outside.

Next, the structure of the fuel cell module of the solid oxide fuel cell device according to the embodiment of the present invention will be described with reference to FIGS.
2 is a side sectional view showing a fuel cell module of a solid oxide fuel cell device according to an embodiment of the present invention, and FIG. 3 is a sectional view taken along line III-III of FIG. 4 is an exploded perspective view of the module case and the air passage cover.

As shown in FIGS. 2 and 3, the fuel cell module 2 has a fuel cell assembly 12 and a reformer 120 provided inside a module case 8 covered with a heat insulating material 7, and also has a module case 8 And an evaporator 140 that is provided outside and inside the heat insulating material 7. In the present embodiment, a block-shaped heat insulating material 7a is arranged in the space between the module case 8 and the evaporator 140 and around the module case 8, and the plate-shaped heat insulating material 7 surrounds the outside thereof. Are arranged.

First, as shown in FIG. 4, the module case 8 includes a substantially rectangular top plate 8a, a bottom plate 8c, and a pair of side plates 8b facing each other, which connect sides extending in the longitudinal direction (the left-right direction in FIG. 2) of each other. A closed side plate that closes the tubular body and two opposing openings at both ends in the longitudinal direction of the tubular body, and connects the sides extending in the width direction (left-right direction in FIG. 3) of the top plate 8a and the bottom plate 8c. It consists of 8d and 8e.

In the module case 8, the top plate 8a and the side plates 8b are covered by the air passage cover 160. The air passage cover 160 has a top plate 160a and a pair of side plates 160b facing each other. An opening 167 for allowing the exhaust pipe 171 to penetrate therethrough is provided in a substantially central portion of the top plate 160a. Further, an opening 168 to which the power generation air introduction pipe 74 (see FIG. 2) is connected is provided in a portion of the top plate 160a on the closed side plate 8d side. The top plate 160a and the top plate 8a are separated from each other and the side plate 160b and the side plate 8b are separated from each other by a predetermined distance. As a result, oxidation occurs between the outside of the module case 8 and the heat insulating material 7, specifically between the top plate 8a and the side plate 8b of the module case 8 and the top plate 160a and the side plate 160b of the air passage cover 160. Air passages 161a and 161b are formed as agent gas supply passages (see FIG. 3).

The lower portion of the side plate 8b of the module case 8 is provided with air outlets 8f which are a plurality of through holes (see FIG. 4). The power generation air is supplied into the air passage 161a from a power generation air introduction pipe 74 provided in the top plate 160a of the air passage cover 160 at a substantially central portion on the side of the closing side plate 8d of the module case 8 (FIG. 2). reference). Then, the power generation air is injected into the power generation chamber 10 from the air outlet 8f toward the fuel cell assembly 12 through the air passages 161a and 161b (see FIGS. 3 and 4).

Further, plate fins 162 and 163 as heat exchange promoting members are provided inside the air passages 161a and 161b (see FIG. 3). The plate fins 162 are provided in the horizontal direction so as to extend in the longitudinal direction and the width direction between the top plate 8a of the module case 8 and the top plate 160a of the air passage cover 160, and the plate fins 163 are the side plates 8b of the module case 8. And the side plate 160b of the air passage cover 160 and above the fuel cell unit 16 so as to extend in the longitudinal direction and the vertical direction.

The power generation air flowing through the air passages 161a and 161b, particularly when passing through the plate fins 162 and 163, is inside the module case 8 inside the plate fins 162 and 163 (specifically, along the top plate 8a and the side plate 8b). The heat is exchanged with the exhaust gas passing through the exhaust passage (provided in the above) and the exhaust gas is heated. For this reason, the portions of the air passages 161a and 161b where the plate fins 162 and 163 are provided function as a heat exchanger (heat exchange section). The portion provided with the plate fins 162 constitutes the main heat exchanger portion, and the portion provided with the plate fins 163 constitutes the subordinate heat exchanger portion.

On the other hand, as shown in FIG. 2, metal pipes 144 and 146 are attached to the closing side plate 8e of the module case 8. These metal pipes are closed at the tip side attached to the closing side plate 8e, and a temperature sensor is arranged inside. That is, the pipe 144 is attached to the side of the combustion chamber 18, and the combustion chamber temperature sensor 144a is arranged inside. Further, the pipe 144 is arranged so as to communicate with the insertion port formed in the heat insulating material 7. When the fuel cell module 2 is assembled, after the heat insulating material 7 is attached, the combustion chamber temperature sensor 144a is inserted into the pipe 144 from the outside of the heat insulating material 7 through the insertion port.

The metal pipe 146 is attached to the side of the fuel cell stack 14, that is, the side of the power generation chamber 10, and a power generation chamber temperature sensor (not shown) is arranged inside. This power generation chamber temperature sensor is enclosed in a metal pipe 146, and the pipe 146 penetrates the heat insulating material 7 and is exposed to the outside.

Next, the evaporator 140 is fixed on the top plate 8a of the module case 8 so as to extend in the horizontal direction. The evaporator 140 is connected to the exhaust pipe 171 and the mixed gas supply pipe 112 at one end in the longitudinal direction (the left-right direction in FIG. 2), and the exhaust gas exhaust pipe 82 at the other end in the longitudinal direction. Are connected and are supported by the exhaust pipe 171. Further, a part of the block-shaped heat insulating material 7a is arranged between the evaporator 140 and the module case 8 so as to fill these gaps (see FIGS. 2 and 3).

Specifically, the evaporator 140 includes a water supply pipe 62 for supplying water and raw fuel gas (which may include reforming air) to one side end side in the longitudinal direction (the left-right direction in FIG. 2). The raw material supply pipe 63 and the exhaust gas exhaust pipe 82 (see FIG. 2) for exhausting exhaust gas are connected, and the upper end of the exhaust pipe 171 is connected to the other side end in the longitudinal direction. Of these, the water supply pipe 62 and the raw material supply pipe 63 penetrate the heat insulating material 7 and extend to the outside. The exhaust pipe 171 extends downward through an opening 167 formed in the top plate 160a of the air passage cover 160, and is connected to an exhaust port 111 formed on the top plate 8a of the module case 8. The exhaust port 111 is an opening through which the exhaust gas generated in the combustion chamber 18 in the module case 8 is discharged to the outside of the module case 8, and is located in the central portion of the top plate 8a of the module case 8 which is substantially rectangular in a top view. Has been formed.

Further, the evaporator 140 includes a heater 157 (FIG. 3). The heater 157 is provided along the outer periphery of the three sides of the rectangular evaporator 140, and both ends thereof extend toward the upstream side of the evaporator 140.
A metal pipe 69 is attached to the upper surface of the evaporator 140. This metal pipe 69 is also closed on the tip side, and an evaporator temperature sensor (not shown) is arranged inside. Similarly to the water supply pipe 62 and the raw material supply pipe 63, the metal pipe 69 also extends horizontally across the side edge of the evaporator 140. After the heat insulating material 7 is arranged so as to surround the module case 8, the evaporator temperature sensor is externally inserted through an insertion port formed in the heat insulating material 7 so as to be aligned with the metal pipe 69.

An exhaust gas flow path 154 is provided below the evaporator 140, and the exhaust gas is introduced from an exhaust pipe 171, and the heat of the exhaust gas heats the evaporator 140. The exhaust pipe 171 is connected to the upstream end of the exhaust gas flow passage 154, and the exhaust gas discharge pipe 82 is connected to the downstream end of the exhaust gas flow passage 154. The exhaust gas discharge pipe 82 connected to the evaporator 140 extends downward, and the lower end thereof is connected to the combustion catalyst 200. The combustion catalyst 200 is a cylindrical member that extends in the lateral direction, and has a cylindrical space formed therein. The exhaust gas discharge pipe 82 is connected to one end of the combustion catalyst 200, and the exhaust gas discharge pipe 202 is connected to the other end of the combustion catalyst 200. The exhaust gas discharge pipe 202 extends horizontally in a direction away from the evaporator 140 in the horizontal direction. Like the evaporator 140, the combustion catalyst 200 is arranged inside the heat insulating material 7.

Next, as shown in FIGS. 2 and 3, the reformer 120 is arranged above the combustion chamber 18 so as to extend horizontally along the longitudinal direction of the module case 8, and the top plate 8 a of the module case 8 is arranged. Are fixed to the top plate 8a while being separated by a predetermined distance via the exhaust gas guide member 130. The reformer 120 has a substantially rectangular outer shape in a top view, but is an annular structure having a through hole 120b formed in the center, and has a housing in which an upper case 121 and a lower case 122 are joined. ing. The through hole 120b is located so as to overlap the exhaust port 111 formed in the top plate 8a in a top view, and preferably, the exhaust port 111 is formed at the center position of the through hole 120b.

On one end side of the reformer 120 in the longitudinal direction (closer side plate 8e side of the module case 8), the mixed gas supply pipe 112 is connected to the mixed gas supply port 120a provided in the upper case 121, and the other end side ( On the closed side plate 8d side), the fuel gas supply pipe 64 is connected to the lower case 122 and the hydrogen desulfurizer hydrogen extraction pipe 65 extending to the desulfurizer 36 is connected to the upper case 121. Therefore, the reformer 120 receives the mixed gas (that is, the raw fuel gas mixed with steam (which may include reforming air)) from the mixed gas supply pipe 112, and internally reforms the mixed gas, The reformed gas (that is, fuel gas) is discharged from the fuel gas supply pipe 64 and the hydrogen desulfurizer hydrogen extraction pipe 65. Further, the hydrogen extraction pipe 65 for the hydrodesulfurizer penetrates the block-shaped heat insulating material 7a and the plate-shaped heat insulating material 7 and extends to the outside.

The interior space of the reformer 120 is partitioned into three spaces by the two partition plates 123a and 123b, so that the reformer 120 receives the mixed gas from the mixed gas supply pipe 112 in the mixed gas receiving portion 120A. And a reforming section 120B filled with a reforming catalyst (not shown) for reforming the mixed gas, and a gas discharging section 120C for discharging the gas that has passed through the reforming section 120B. (See Figure 2). The reforming section 120B is a space sandwiched between the partition plates 123a and 123b, and the reforming catalyst is held in this space. The mixed gas and the fuel gas after reforming are movable through a plurality of communication holes (slits) provided in the partition plates 123a and 123b. Further, as the reforming catalyst, one having nickel added to the surface of the sphere of alumina, or one having ruthenium added to the surface of the sphere of alumina is appropriately used.

The mixed gas supplied from the evaporator 140 via the mixed gas supply pipe 112 is jetted into the mixed gas receiving portion 120A through the mixed gas supply port 120a. This mixed gas is expanded in the mixed gas receiving section 120A, the ejection speed is reduced, and passes through the partition plate 123a to be supplied to the reforming section 120B.
In the reforming section 120B, the low-speed moving mixed gas is reformed into fuel gas by the reforming catalyst, and this fuel gas passes through the partition plate 123b and is supplied to the gas discharge section 120C.
In the gas discharge part 120C, the fuel gas is discharged to the fuel gas supply pipe 64 and the hydrogen desulfurizer hydrogen extraction pipe 65. Further, a metal pipe (not shown) is attached to the gas discharge part 120C in parallel with the hydrogen extraction pipe 65 for the hydrodesulfurizer. This metal pipe is a pipe whose tip is closed, and a reformer temperature sensor (not shown) is arranged inside. Further, the heat insulating material 7 is provided with an insertion opening so as to be aligned with the metal pipe. At the time of assembling the fuel cell module 2, after the heat insulating material 7 is attached, a reformer temperature sensor (not shown) is inserted into the metal pipe from the outside of the heat insulating material 7 through the insertion port. It

The fuel gas supply pipe 64, which serves as a fuel gas supply passage, extends downward in the module case 8 along the closing side plate 8d, is bent substantially 90° in the vicinity of the bottom plate 8c, and extends in the horizontal direction. It enters into the manifold 66 formed below, and further extends horizontally in the manifold 66 to the vicinity of the closing side plate 8e on the opposite side. A plurality of fuel supply holes 64b are formed on the lower surface of the horizontal portion 64a of the fuel gas supply pipe 64, and the fuel gas is supplied into the manifold 66 from the fuel supply holes 64b. A lower support plate 68 having a through hole for supporting the fuel cell stack 14 is attached above the manifold 66, and the fuel gas in the manifold 66 is supplied into the fuel cell unit 16. It Further, an ignition device 83 for starting combustion of fuel gas and air is provided in the combustion chamber 18. The ignition device 83 extends from the combustion chamber 18 in the module case 8 through the plate-shaped heat insulating material 7 to the outside.

The exhaust gas guide member 130 is arranged so as to extend horizontally between the reformer 120 and the top plate 8a along the longitudinal direction of the module case 8. The exhaust gas guide member 130 includes a lower guide plate 131 and an upper guide plate 132, which are vertically separated from each other by a predetermined distance, and connecting plates 133 and 134 to which both ends in the longitudinal direction are attached (FIG. 2). , See FIG. 3). Both ends in the width direction of the upper guide plate 132 are bent downward and are connected to the lower guide plate 131. The upper ends of the connecting plates 133 and 134 are connected to the top plate 8a, and the lower ends thereof are connected to the reformer 120, whereby the exhaust gas guide member 130 and the reformer 120 are fixed to the top plate 8a. ing.

The lower guide plate 131 is formed with a convex step portion 131a whose central portion in the width direction (left-right direction in FIG. 3) projects downward. On the other hand, similar to the lower guide plate 131, the upper guide plate 132 is formed with a recess 132a such that the center portion in the width direction is recessed downward. The convex step portion 131a and the concave portion 132a extend in the longitudinal direction in parallel in the vertical direction. The mixed gas supply pipe 112 extends horizontally in the recess 132a in the module case 8 and then bends downward near the closing side plate 8e to penetrate the upper guide plate 132 and the lower guide plate 131, It is connected to the reformer 120.

In the exhaust gas guide member 130, the upper guide plate 132, the lower guide plate 131, and the connecting plates 133 and 134 form a gas reservoir 135 which is an internal space functioning as a heat insulating layer. The gas reservoir 135 is in fluid communication with the combustion chamber 18. That is, the upper guide plate 132, the lower guide plate 131, and the connecting plates 133 and 134 are connected so as to form a predetermined gap and are not airtightly connected. It is possible for exhaust gas to flow into the gas reservoir 135 from the combustion chamber 18 during operation, and for air to enter from the outside when the gas is stopped, but generally gas movement between the inside and outside of the gas reservoir 135 is possible. Is loose.

The upper guide plate 132 is arranged with a predetermined vertical distance from the top plate 8a, and an exhaust gas extending horizontally along the longitudinal direction and the width direction between the upper guide plate 132 and the top plate 8a. A passage 172 is formed. The exhaust passage 172 is arranged in parallel with the air passage 161a with the top plate 8a of the module case 8 interposed therebetween. Inside the exhaust passage 172, plate fins similar to the plate fins 162 and 163 in the air passages 161a and 161b are provided. 175 are arranged. The plate fins 175 are provided at substantially the same positions as the plate fins 162 in a top view, and face each other in the vertical direction with the top plate 8a interposed therebetween. In the portions of the air passage 161a and the exhaust passage 172 where the plate fins 162 and 175 are provided, efficient heat exchange is performed between the power generation air flowing through the air passage 161a and the exhaust gas flowing through the exhaust passage 172. As a result, the heat of the exhaust gas raises the temperature of the power generation air.

Further, the reformer 120 is arranged at a predetermined horizontal distance from the side plate 8b of the module case 8, and the exhaust gas is passed between the reformer 120 and the side plate 8b from the lower side to the upper side. An exhaust passage 173 is formed. Further, the exhaust gas guide member 130 is also arranged at a predetermined horizontal distance from the side plate 8b, and the exhaust passage 173 extends to the top plate 8a including the passage between the exhaust gas guide member 130 and the side plate 8b. ing. The exhaust passage 173 communicates with the exhaust passage 172 through an exhaust gas introduction port 172a located at a corner between the top plate 8a and the side plate 8b. The exhaust gas inlet 172a extends in the module case 8 in the longitudinal direction.

Further, the lower guide plate 131 is disposed at a predetermined vertical distance from the top surface of the upper case 121 of the reformer 120, and is disposed between the lower guide plate 131 and the upper case 121 and the reformer. The through hole 120b of 120 forms an exhaust passage 174 through which the exhaust gas passing through the through hole 120b from the lower side to the upper side passes. The exhaust passage 174 merges with the exhaust passage 173 above the reformer 120.

Next, the fuel cell unit 16 will be described with reference to FIG.
FIG. 5 is a partial cross-sectional view showing a fuel cell unit of a solid oxide fuel cell according to an embodiment of the present invention.
As shown in FIG. 5, the fuel cell unit 16 includes a fuel cell 84 and inner electrode terminals 86, which are caps connected to both ends of the fuel cell 84, respectively.

The fuel cell 84 is a tubular structure extending in the vertical direction, and has a cylindrical inner electrode layer 90 that forms a fuel gas flow passage 88 therein, a cylindrical outer electrode layer 92, an inner electrode layer 90 and the outside. And an electrolyte layer 94 between the electrode layer 92 and the electrode layer 92. The inner electrode layer 90 is a fuel electrode through which the fuel gas passes and serves as a (−) pole, while the outer electrode layer 92 is an air electrode in contact with air and serves as a (+) pole.

Since the inner electrode terminals 86 attached to the upper end side and the lower end side of the fuel cell 84 have the same structure, the inner electrode terminal 86 attached to the upper end side will be specifically described here. The upper portion 90a of the inner electrode layer 90 includes an outer peripheral surface 90b exposed to the electrolyte layer 94 and the outer electrode layer 92, and an upper end surface 90c. The inner electrode terminal 86 is connected to the outer peripheral surface 90b of the inner electrode layer 90 via the conductive sealing material 96, and further, is in direct contact with the upper end surface 90c of the inner electrode layer 90, so that the inner electrode layer 90 is connected to the inner electrode layer 90. It is electrically connected. At the center of the inner electrode terminal 86, a fuel gas passage thin tube 98 communicating with the fuel gas passage 88 of the inner electrode layer 90 is formed.

The fuel gas passage thin tube 98 is an elongated thin tube provided so as to extend in the axial direction of the fuel cell 84 from the center of the inner electrode terminal 86.
The inner electrode layer 90 includes, for example, a mixture of Ni and zirconia doped with at least one selected from rare earth elements such as Ca, Y, and Sc, Ni, and ceria doped with at least one selected from rare earth elements. It is formed of at least one of a mixture, Ni, and a mixture of lanthanum garde doped with at least one selected from Sr, Mg, Co, Fe, and Cu.

The electrolyte layer 94 includes, for example, zirconia doped with at least one selected from rare earth elements such as Y and Sc, ceria doped with at least one selected from rare earth elements, and lanthanum gallate doped with at least one selected from Sr and Mg, Of at least one of

The outer electrode layer 92 includes, for example, lanthanum manganite doped with at least one selected from Sr and Ca, lanthanum ferrite doped with at least one selected from Sr, Co, Ni, and Cu, Sr, Fe, Ni, and Cu. It is formed of at least one of lanthanum cobaltite, silver, etc. doped with at least one selected from

Next, the fuel cell stack 14 will be described with reference to FIG.
FIG. 6 is a perspective view showing a fuel cell stack of a solid oxide fuel cell according to an embodiment of the present invention.
As shown in FIG. 6, the fuel battery cell stack 14 includes 16 fuel battery cell units 16, and these fuel battery cell units 16 are arranged in two rows of eight fuel battery cell units 16.
Each fuel cell unit 16 is supported at its lower end by a rectangular lower support plate 68 (see FIG. 2) made of ceramic, and at the upper end, four fuel cell units 16 at both ends, each of which has a substantially square shape. It is supported by the upper support plate 100. Each of the lower support plate 68 and the upper support plate 100 has a through hole through which the inner electrode terminal 86 can pass.

Further, a current collector 102 and an external terminal 104 are attached to the fuel cell unit 16. The current collector 102 includes a fuel electrode connecting portion 102a electrically connected to the inner electrode terminal 86 attached to the inner electrode layer 90 serving as a fuel electrode, and an outer peripheral surface of the outer electrode layer 92 serving as an air electrode. It is integrally formed so as to connect to the air electrode connecting portion 102b that is electrically connected. Further, a thin film made of silver is formed as an electrode on the air electrode side on the entire outer surface of the outer electrode layer 92 (air electrode) of each fuel cell unit 16. The current collector 102 is electrically connected to the entire air electrode by bringing the air electrode connection portion 102b into contact with the surface of the thin film.

Further, two external terminals 104 are connected to the air electrode of the fuel cell unit 16 located at the end of the fuel cell stack 14 (the inner side of the left end in FIG. 6). These external terminals 104 are connected to the inner electrode terminals 86 of the fuel cell units 16 at the ends of the adjacent fuel cell stacks 14, and all 128 fuel cell units 16 are connected in series as described above. It is supposed to be done.

Next, the flow of gas in the fuel cell module will be described with reference to FIGS. 2 and 3.
First, water and raw fuel gas (raw material gas) are supplied to the upper layer of the evaporator 140 from a water supply pipe 62 and a raw material supply pipe 63 connected to one end side of the evaporator 140 in the longitudinal direction. The water supplied to the evaporator 140 evaporates into steam, which is mixed with the raw fuel gas and flows into the mixed gas supply pipe 112. The mixed gas flowing into the mixed gas supply pipe 112 is reformed in the reformer 120 into a fuel gas rich in hydrogen. The fuel gas reformed in the reformer 120 flows into the inside of each fuel cell unit 16 through the fuel gas supply pipe 64 and the manifold 66.

On the other hand, the power generation air flows from the power generation air introduction pipe 74 into the air passage 161a in the upper part of the module case 8 to be heated, and then flows into the air passage 161b on the side surface of the module case 8. The air that has flowed into the air passage 161b flows into the power generation chamber 10 through the air outlet 8f on the side surface of the module case 8. The air that has flowed into the power generation chamber 10 causes a power generation reaction with the fuel gas that flows inside each fuel cell unit 16, and an electric charge is generated. The fuel gas remaining without being used for power generation is combusted at the tip of each fuel cell unit 16, and exhaust gas is generated in the combustion chamber 18.

The generated exhaust gas heats the reformer 120 above the combustion chamber 18, and then passes through the exhaust passage 173 and the exhaust gas introduction port 172a to heat the air for power generation in the air passage 161a. The exhaust gas that has passed through the exhaust gas introduction port 172a flows into the lower layer of the evaporator 140 through the exhaust port 111 and heats the water supplied to the upper layer. The exhaust gas that has passed through the lower layer of the evaporator 140 flows into the combustion catalyst device 200 through the exhaust gas discharge pipe 82. The exhaust gas purified in the combustion catalyst device 200 is discharged from the exhaust gas discharge pipe 202.

Next, the fixing structure of the plate-shaped heat insulating material 7 arranged around the module case 8 will be described with reference to FIGS. 7 to 9.
FIG. 7 is a perspective cross-sectional view showing a state where the module case is surrounded by a plate-shaped heat insulating material. FIG. 8 is a perspective view showing a state where the plate-shaped heat insulating material is fixed by a part of the fixing members. FIG. 9 is a perspective view showing a state where the plate-shaped heat insulating material is fixed by all the fixing members.

As shown in FIG. 7, the module case 8 accommodating the plurality of fuel cell unit 16 is surrounded by a plurality of plate-shaped heat insulating materials 7. A block-shaped heat insulating material 7a is arranged in a space between the module case 8 and each plate-shaped heat insulating material 7. The block-shaped heat insulating material 7a is a heat insulating material made of fumed silica, and fills a gap between the module case 8 and the outer plate-shaped heat insulating material 7. The plate-shaped heat insulating material 7 is also made of fumed silica, but the surface thereof is covered with a shape retention sheet of glass cloth. By covering and strengthening the heat insulating material made of fumed silica with the shape-retaining sheet, the heat insulating material 7 can be used as the outermost outer packaging material as in the present embodiment.

Further, the six flat plate-shaped heat insulating materials 7 arranged laterally (4 directions), above and below the module case 8 form a rectangular parallelepiped, and the tray 6a is arranged on the bottom surface of the rectangular parallelepiped. The fixing members 6b to 6i are respectively arranged so as to extend along the remaining ridgelines. Each of the fixing members 6b to 6i is an elongated metal member having an L-shaped cross section, and is arranged so as to cover the edges of the two heat insulating materials 7 that are in contact with each other at the ridge line of the rectangular parallelepiped. Further, the tray 6a and each of the fixing members 6b to 6i are connected to each other at their ends (the corners of the rectangular parallelepiped), so that each plate-shaped heat insulating material 7 is located at a predetermined position around the module case 8. Held in.

Next, as shown in FIG. 8, from the module case 8 surrounded by the plate-shaped heat insulating material 7, a plurality of pipes, electric wirings, etc. are drawn to the outside. That is, from one side surface of the module case 8, a water supply pipe 62 (FIG. 3), a raw material supply pipe 63 (FIG. 3), electrodes at both ends of the heater 157 (FIG. 3), and a power generation air introduction pipe 74 (FIG. 2). , The exhaust gas discharge pipe 202 (FIG. 2), the ignition device 83 (FIG. 2), and the pipe 146 (FIG. 2) for arranging the power generation chamber temperature sensor are projected, and some of these are arranged on the side surface. It penetrates through the plate-shaped heat insulating material 7 and is exposed to the outside. Further, a hydrogen take-out pipe 65 for hydrodesulfurizer (FIG. 2) projects from the upper surface of the module case 8, and this penetrates the plate-shaped heat insulating material 7 arranged on the upper surface and is exposed to the outside.

Of these protrusions, the water supply pipe 62 and the raw material supply pipe 63 are exposed to the outside through the notches 180a and 180b provided in the heat insulating material 7 arranged on the upper surface. In addition, the electrode of the heater 157 and the power generation air introduction pipe 74 are exposed to the outside through a gap 182 between the heat insulating material 7 arranged on the upper surface and the heat insulating material 7 arranged on the side surface. Further, the exhaust gas discharge pipe 202, the ignition device 83, and the pipe 146 are exposed to the outside through through holes 184a and 184b formed in the heat insulating material 7 arranged on the side surfaces, respectively. Further, the hydrogen extraction pipe 65 for the hydrodesulfurizer is exposed to the outside through a through hole 186 formed in the heat insulating material 7 arranged on the upper surface.

In addition to this, the heat insulating material 7 arranged on the side surface is provided with an insertion port 188. The insertion port 188 is formed at a position aligned with the metal pipe 144 for disposing the combustion chamber temperature sensor 144a (FIG. 7). After the heat insulating material 7 is arranged, the combustion chamber temperature sensor 144a is inserted through the insertion port 188. The combustion chamber temperature sensor 144a is arranged at the closed front end of a metal pipe 144 arranged in alignment with the insertion port 188, and a lead wire which is a penetrating component extending from the combustion chamber temperature sensor 144a from the insertion port 188. 190 is pulled out.

Similarly, the heat insulating material 7 arranged on the upper surface is provided with an insertion port 192. The insertion port 192 is formed at a position aligned with a metal pipe (not shown) for disposing a reformer temperature sensor (not shown). After the heat insulating material 7 is arranged, the reformer temperature sensor is inserted through the insertion port 192. The reformer temperature sensor is arranged at the closed front end of a metal pipe arranged in alignment with the insertion port 192, and from the insertion port 192, a lead wire 194 which is a penetrating part extending from the reformer temperature sensor. Is withdrawn.

Further, the metal pipe 69 (FIG. 2) for disposing the evaporator temperature sensor (not shown) is aligned with the gap 182 between the heat insulating material 7 arranged on the side surface and the heat insulating material 7 arranged on the upper surface. It is located in a position. The evaporator temperature sensor is inserted into the pipe 69 through the gap 182 after the heat insulating materials 7 are arranged, and the lead wire 196, which is a penetrating component extending from the evaporator temperature sensor, is pulled out from the gap 182. ..

As shown in FIG. 9, the tray 6a and the fixing members 6b to 6i are arranged outside each heat insulating material 7 arranged around the module case 8, and each heat insulating material 7 is held at a predetermined position.
The tray 6a is a metal plate whose four sides are bent upward, and the module case 8 surrounded by the heat insulating material 7 is placed on the metal plate.
The fixing members 6b to 6e are elongated members having an L-shaped cross section that rises vertically from the four corners of the tray 6a. The fixing members 6b to 6e are arranged along the ridges so as to cover the edges of the plate-shaped heat insulating material 7 arranged on each side surface of the module case 8.

The fixing members 6f and 6g are elongated members having an L-shaped cross section and arranged along the opposite long sides of the heat insulating material 7 arranged above the module case 8, and the heat insulating material 7 arranged above and the side surface. Are arranged along the ridgeline formed by the heat insulating material.

The fixing member 6h is an elongated member having an L-shaped cross section arranged along one short side of the heat insulating material 7 arranged above the module case 8. Both ends of the fixing member 6h are respectively screwed and connected to the ends of the fixing members 6f and 6g arranged along the long side. By disposing this fixing member 6h, the gap 182 (FIG. 7) between the heat insulating material 7 on the upper surface and the heat insulating material 7 on the side surface is covered. Further, the notches 180a and 180b (FIG. 7) provided in the heat insulating material 7 on the upper surface are also covered with the fixing member 6h. Further, the fixing member 6h has holes for passing the terminals of the heater 157 projecting from the gap 182 and the notches 180a and 180b, the power-generating air introduction pipe 74, the water supply pipe 62, and the raw material supply pipe 63, respectively. It is provided.

A lead wire 196 extending from the evaporator temperature sensor (not shown) drawn to the outside through the gap 182 is drawn to the outside from between the front surface of the heat insulating material 7 on the side surface and the back surface of the fixing member 6h. Further, the gap 182 is filled with a cotton-like heat insulating material (not shown), and the gap between the heat insulating material 7 on the side surface and the heat insulating material 7 on the upper surface is filled, so that heat dissipation from the module case 8 is suppressed. To be done. By attaching the fixing member 6h, it is possible to prevent the stuffed cotton-like heat insulating material from falling off and the evaporator temperature sensor (not shown) inserted into the pipe 69 (FIG. 2) from falling off. In addition, the width of the fixing member 6h is configured in such a shape that the lead wire 196 pulled out can be exposed to the outside. Thus, by exposing the lead wire 196 to the outside, it is possible to recognize that the evaporator temperature sensor (not shown) is attached even after attaching the fixing member 6h.

The fixing member 6i is a member arranged along the short side of the heat insulating material 7 arranged above the module case 8 on the side opposite to the fixing member 6h. The fixing member 6i is an elongated member having an L-shaped cross-section similar to the other fixing members, and a "U"-shaped extending portion 198 for closing is integrally formed. It is a square-shaped thin plate. In other words, the fixing member 6i has a form in which the fixing member 6i having an L-shaped cross section is integrally formed with the "U"-shaped opening extending portion 198 extending so as to connect both ends thereof. .. The portion of the fixing member 6i bent downward in an L shape is arranged along the heat insulating material 7 on the side surface.

Each short side of the fixing member 6i (sides on both sides of the U-shaped extension portion 198 for closing) is arranged so as to overlap the fixing members 6f and 6g, and is connected to these fixing members by screwing. Has been done. In addition, a hole for projecting the hydrogen take-out pipe 65 for the hydrodesulfurizer is formed at the central side of the U-shaped extension part 198 for closing. Further, the central side of the plug extension 198 is arranged so as to cover the insertion port 192 provided in the heat insulating material 7 arranged above.

The lead wire 194 extending from the reformer temperature sensor (not shown) drawn to the outside through the insertion port 192 is drawn to the outside from between the top surface of the heat insulating material 7 and the back surface of the plug extension 198. Be done. Here, the insertion port 192 provided in the heat insulating material 7 is formed to have a size into which a reformer temperature sensor (not shown) can be inserted, whereas the lead wire pulled out from the insertion port 192. 194 is thin, and a large gap is formed between the insertion port 192 and the lead wire 194. A cotton-like heat insulating material (not shown) is packed in this gap to suppress the dissipation of heat from the module case 8.

By attaching the fixing member 6i (extension part 198 for closing) so as to cover the insertion port 186, the cotton-like heat insulating material is prevented from falling off and the reformer temperature sensor (not shown) is prevented from coming off. The width of the plug extension portion 198 is configured to have a size and shape that allows the drawn lead wire 194 to be exposed to the outside. By thus exposing the lead wire 194 to the outside, it is possible to recognize that the reformer temperature sensor (not shown) is attached even after the fixing member 6i is attached.

The fixing member 6b is arranged along the vertical ridge line so as to cover the edges of the two plate-shaped heat insulating materials 7 arranged on the side surfaces of the module case 8. The fixing member 6b includes a rectangular opening extension 199 formed so as to project at a right angle, and the insertion extension 199 covers the insertion opening 188 provided in the heat insulating material 7. Be seen. The lead wire 190 extending from the combustion chamber temperature sensor 144a (FIG. 2) drawn to the outside through the insertion port 188 is drawn to the outside from between the surface of the heat insulating material 7 on the side surface and the back surface of the plug extension 199. ..
In addition, the heat insulating material 7 on the side surface also penetrates the pipe 146 (FIG. 2) in which the power generation chamber temperature sensor (not shown) is inserted, but the base end portion of the pipe 146 is sealed. Even if the outside of the pipe 146 is not closed by the extension portion for closing or the like, the heat dissipated through the pipe 146 is relatively small.

Further, the insertion port 188 is formed to have a size into which the combustion chamber temperature sensor 144a can be inserted, while the lead wire 190 is thin, and a cotton-like heat insulation is provided in the gap between the insertion port 188 and the lead wire 190. The material (not shown) is packed. By attaching the fixing member 6b (extending part 199 for closing) so as to cover the insertion port 188, the cotton-like heat insulating material and the combustion chamber temperature sensor 144a are prevented from falling off. The width of the plug extension portion 199 is configured so that the drawn lead wire 190 can be exposed to the outside. In this way, by exposing the lead wire 190 to the outside, it is possible to recognize that the combustion chamber temperature sensor 144a is attached even after the fixing member 6b is attached.

According to the solid oxide fuel cell device 1 of the embodiment of the present invention, the fixing extension portion 199 is provided in the fixing member 6b holding the heat insulating material 7, and the closing extension portion 198 is provided in the fixing member 6i. Are provided, and the insertion ports 192 and 188 are closed by these, it is possible to omit a dedicated part for closing each insertion port. This can prevent a large increase in the number of parts and an increase in the number of assembly steps.

Further, according to the solid oxide fuel cell device 1 of the present embodiment, since the plugging extension portion 198 is formed as a U-shaped portion extending so as to connect both ends of the fixing member 6i, Even when the insertion opening 192 to be closed is located far from the ridge line where the fixing member 6i is arranged, the insertion opening 192 can be reliably closed.

Further, according to the solid oxide fuel cell device 1 of the present embodiment, the plugging extending portions 198 and 199 are configured to have a size and shape such that the lead wires 194 and 190 which are penetrating parts are exposed to the outside. Therefore, it is possible to easily find an error such as forgetting to attach the sensor, and it is possible to suppress loss of assembly work time.

Although the preferred embodiment of the present invention has been described above, various modifications can be made to the above-described embodiment. In particular, in the above-described embodiment, the lead wire is drawn out as the penetrating part, but the present invention can also be applied to the closing of the insertion port through which another part is drawn out. Further, in the above-described embodiment, the temperature sensor having the lead wire is inserted after the heat insulating material is arranged, but in order to close the insertion port through which the penetrating component protruding from before the heat insulating material is arranged is pulled out. The present invention can also be applied to.

In addition, as a preferable configuration aspect, the present invention may be configured as follows.
1. A solid oxide fuel cell device comprising a plurality of fuel battery cells that generate electric power using a fuel gas and an oxidant gas,
A box-shaped module case containing the fuel cell inside,
A plurality of plate-shaped heat insulating materials arranged so as to surround the periphery of the module case,
A plurality of fixing members arranged along a ridgeline formed by each heat insulating material surrounding the module case so that each of the heat insulating materials is held around the module case,
Have
The heat insulating material is covered with a shape-retaining sheet so that the plate-like shape of the heat insulating material is retained, and an insertion opening for inserting a penetrating component extending from the module case to the outside of the heat insulating material is provided,
The fixing member is a member having a substantially L-shaped cross section that is attached so as to cover the edges of the two heat insulating materials that are in contact with each other, and at least one of the fixing members closes the insertion opening. A solid oxide fuel cell device, comprising:
2. 2. The solid oxide fuel cell device according to claim 1, wherein the plugging extending portion is a U-shaped portion that extends so as to connect both ends of the fixing member.
3. 3. The solid oxide fuel cell according to 1 or 2 above, wherein the plugging extension portion is configured to have a size and shape that exposes the penetrating component extending through the covering insertion opening to the outside. apparatus.

1 Solid Oxide Fuel Cell Device 2 Fuel Cell Module 4 Auxiliary Unit 6a Tray 6b Fixing Member 6c Fixing Member 6d Fixing Member 6e Fixing Member 6f Fixing Member 6g Fixing Member 6h Fixing Member 6i Fixing Member 7 Insulating Material 7a Insulating Material 8 Module Case 8a Top plate 8b Side plate 8c Bottom plate 8d Closing side plate 8e Closing side plate 8f Air outlet 10 Power generation chamber 12 Fuel cell cell assembly 14 Fuel cell cell stack 16 Fuel cell unit 18 Combustion chamber 24 Water supply source 26 Pure water tank 28 Water flow rate Adjustment unit 30 Fuel supply source 32 Gas cutoff valve 36 Desulfurizer 38 Fuel flow rate adjustment unit 39 Valve 40 Air supply source 42 Electromagnetic valve 44 Reforming air flow rate adjustment unit 45 Power generation air flow rate adjustment unit 50 Hot water production device 52 Control box 54 Inverter 62 Water supply pipe 63 Raw material supply pipe 64 Fuel gas supply pipe 64a Horizontal part 64b Fuel supply hole 65 Hydrogen extraction pipe for hydrodesulfurizer 66 Manifold 68 Lower support plate 69 Pipe 74 Air introduction pipe for power generation 82 Exhaust gas discharge pipe 83 Ignition Device 84 Fuel cell 86 Inner electrode terminal 88 Fuel gas flow channel 90 Inner electrode layer 90a Upper part 90b Outer peripheral surface 90c Upper end surface 92 Outer electrode layer 94 Electrolyte layer 96 Seal material 98 Fuel gas flow channel 100 Upper support plate 102 Current collector 102a Fuel electrode connection part 102b Air electrode connection part 104 External terminal 111 Exhaust port 112 Mixed gas supply pipe 120 Reformer 120A Mixed gas receiving part 120B Reforming part 120C Gas discharge part 120a Mixed gas supply port 120b Through hole 121 Upper side Case 122 Lower case 123a Partition plate 123b Partition plate 130 Exhaust gas guide member 131 Lower guide plate 131a Convex step 132 Upper guide plate 132a Recess 133 Connecting plate 135 Gas reservoir 140 Evaporator 144 Pipe 146 Pipe 154 Exhaust gas flow path 157 Heater 160 Air passage cover 160a Top plate 160b Side plate 161a Air passage 161b Air passage 162 Plate fin 163 Plate fin 167 Opening 171 Exhaust pipe 172 Exhaust passage 172a Exhaust gas inlet 173 Exhaust passage 174 Exhaust passage 175 Plate fin 180a Notch 180b Notch 182 Gap 184a Through hole 184b Through hole 186 Through hole 188 Insertion port 190 Lead wire (through part)
192 Insertion port 194 Lead wire (penetrating part)
196 Lead wire (penetrating part)
198 Closure extension 199 Closure extension 200 Combustion catalyst 202 Exhaust gas discharge pipe

Claims (3)

A solid oxide fuel cell device comprising a fuel battery cell for generating power with a fuel gas and an oxidant gas,
Box-shaped module case,
A plurality of plate-shaped heat insulating materials arranged so as to surround the periphery of the module case,
A plurality of fixing members arranged along a ridgeline formed by each heat insulating material surrounding the module case so that each of the heat insulating materials is held around the module case,
Have
The heat insulating material is covered with a shape-retaining sheet so that its plate-like shape is held, and an insertion port for passing a penetrating component extending from the module case to the outside of the heat insulating material is provided,
The fixing member is a member having a substantially L-shaped cross section that is attached so as to cover the edges of the two heat insulating materials that are in contact with each other, and at least one of the fixing members closes the insertion port. A solid oxide fuel cell device, comprising: The solid oxide fuel cell device according to claim 1, wherein the plugging extending portion is a U-shaped portion that extends so as to connect both end portions of the fixing member. The solid oxide fuel according to claim 1 or 2, wherein the plug extension portion is configured to have a size and shape that exposes the penetrating component extending through the covering insertion opening to the outside. Battery device.

Images