JP2010153062A - Fuel battery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel battery device capable of restraining degradation of a fuel battery cell and capable of reducing cost. <P>SOLUTION: The fuel battery device is provided with a fuel battery cell 1, a reformer 4 equipped with a vaporizing portion 27 for generating fuel gas to be supplied to the fuel battery cell 1 by steam reforming and a reforming portion 28 equipped with a reforming catalyst, a raw fuel supply means 2 for supplying raw fuel to the vaporizing portion 27, a water treatment device for generating water to supply to the vaporizing portion 27, a water pump 11 for supplying water generated at the water treatment device to the vaporizing portion 27, a vaporizing portion temperature sensor 22 for measuring an inlet temperature of the vaporizing portion 27, and a control device 14 for controlling the water pump 11 so as the inlet temperature of the vaporizing portion 27 measured by the vaporizing portion temperature sensor 22 to be in a predetermined temperature range. Therefore, degradation of the fuel battery cell 1 can be suppressed as well as cost can be reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel cell device including a reformer for generating fuel gas necessary for power generation of a fuel cell.

  In recent years, as a next-generation energy, a fuel cell that can obtain electric power using a hydrogen-containing gas (fuel gas) and an oxygen-containing gas (usually air), and a supplement for operating the fuel cell. There have been proposed various fuel cell apparatuses in which an apparatus is housed in an outer case and operating methods thereof.

Here, partial oxidation reforming, autothermal reforming, and steam reforming are used as reforming methods for reforming raw fuel such as natural gas and generating hydrogen-containing gas necessary for power generation of fuel cells. The law is known. The fuel cell apparatus using this steam reforming method includes a reformer for generating fuel gas (hydrogen-containing gas), raw fuel supply means for supplying raw fuel to the reformer, and supply to the reformer. It is known to include an ion exchange resin device for generating water to be generated, a water treatment device including a water tank, a water pump for supplying water generated by the water treatment device to a reformer, and the like. . Here, a method for detecting a failure of a water pump for supplying water to the reformer has been proposed (see, for example, Patent Document 1).
JP 2005-276568 A

  By the way, when a water pump breaks down, the temperature of a vaporization part or a reforming part rises, and carbon deposition occurs due to decomposition of raw fuel such as natural gas, which may deteriorate the fuel cell. Therefore, although a fuel cell device including a flow meter for measuring the amount of water supplied to the reformer by the water pump has been proposed, there is a problem that it is expensive.

  Therefore, an object of the present invention is to provide a fuel cell device that can easily detect a failure of a water pump and suppress deterioration of a fuel cell.

  A fuel cell device of the present invention includes a fuel cell, a reformer including a reforming unit including a vaporization unit and a reforming catalyst for generating fuel gas supplied to the fuel cell by steam reforming, and Raw fuel supply means for supplying raw fuel to the vaporization section, a water treatment device for generating water to be supplied to the vaporization section, and water generated by the water treatment apparatus is supplied to the vaporization section Water pump, a vaporizer temperature sensor for measuring the inlet temperature of the vaporizer, and the water pump so that the inlet temperature of the vaporizer measured by the vaporizer temperature sensor falls within a predetermined temperature range And a control device for controlling the operation.

  In such a fuel cell device, the control device controls the operation of the water pump so that the inlet temperature of the vaporization section falls within a predetermined temperature range, so that a sufficient amount for the reforming reaction in the reformer. Since water can be supplied to the vaporization unit and decomposition of the fuel gas can be suppressed, deterioration of the fuel cell can be suppressed.

  Further, since the amount of water supplied to the vaporization unit can be controlled based on the inlet temperature of the vaporization unit, the flow meter for measuring the amount of water supplied to the vaporization unit can be modified without providing a flow meter. The reforming reaction in the mass device can be controlled. Thereby, the cost of the fuel cell device can be reduced.

  The fuel cell device of the present invention further includes an oxygen-containing gas supply means for supplying an oxygen-containing gas to the vaporizer, and an inlet temperature of the vaporizer measured by the vaporizer temperature sensor is a predetermined temperature. When the control device continues for a predetermined time at a temperature exceeding the range, the control device controls to stop the operation of the water pump and performs the partial oxidation reforming in the reforming unit. And the oxygen-containing gas supply means are preferably controlled.

  In such a fuel cell device, it can be determined that the water pump has failed if the temperature at the inlet of the vaporization unit continues for a predetermined time at a temperature exceeding a predetermined temperature range. At that time, the operation of the water pump is controlled to stop and the oxygen-containing gas supply means for supplying the oxygen-containing gas to the raw fuel supply means and the vaporization section so as to perform partial oxidation reforming in the reforming section Therefore, when a water pump failure is detected, the fuel cell device can be continuously operated.

  In addition, the fuel cell device of the present invention further includes an alarm device that notifies the failure of the water pump, and continues for a predetermined time at a temperature at which the inlet temperature of the vaporizer measured by the vaporizer temperature sensor exceeds a predetermined temperature range. In this case, it is preferable that the control device activates the alarm device.

  In such a fuel cell device, an alarm device for notifying the failure of the water pump is further provided, and when the inlet temperature of the vaporizer continues beyond a predetermined temperature range for a predetermined time, the control device Is determined to be malfunctioning. At that time, the control device can easily notify the failure of the water pump by operating the alarm device that notifies the failure of the water pump.

  In the fuel cell device of the present invention, it is preferable that the control device stops the operation of the fuel cell device when the operation of the alarm device is not stopped for a predetermined time or longer after the alarm device is activated. .

  In such a fuel cell device, if the operation of the alarm device is not stopped for a predetermined time or longer, the control device stops the operation of the fuel cell device, so that the fuel cell device is prevented from continuing to operate with a failure. And safety can be improved.

  A fuel cell device of the present invention includes a fuel cell, a reformer including a reforming unit including a vaporization unit and a reforming catalyst for generating fuel gas supplied to the fuel cell by steam reforming, and Raw fuel supply means for supplying raw fuel to the vaporization section, a water treatment device for generating water to be supplied to the vaporization section, and water generated by the water treatment apparatus is supplied to the vaporization section Water pump, a vaporizer temperature sensor for measuring the inlet temperature of the vaporizer, and the water pump so that the inlet temperature of the vaporizer measured by the vaporizer temperature sensor falls within a predetermined temperature range Therefore, it is possible to suppress the deterioration of the fuel cell and to reduce the cost.

  FIG. 1 is a configuration diagram showing an example of a configuration of a fuel cell system including a fuel cell device of the present invention. In the following drawings, the same numbers are assigned to the same members. First, the configuration of the fuel cell device of the present invention will be described with reference to FIG.

  The fuel cell device of the present invention corresponds to a power generation unit that generates power in FIG. 1, and includes a hot water storage unit that stores hot water after heat exchange, and a circulation pipe that circulates water between these units. A battery system is configured. In addition, it can also be set as the fuel cell apparatus of this invention including a hot water storage unit and circulation piping.

  A fuel cell apparatus (system) shown in FIG. 1 includes a fuel cell 1, a raw fuel supply unit 2 that supplies a raw fuel such as natural gas, and an oxygen-containing gas supply unit that supplies an oxygen-containing gas to the fuel cell 1. 3. A reformer 4 for steam reforming with raw fuel and steam is provided. The reformer 4 vaporizes water supplied by a water pump 11 to be described later, a vaporization section for mixing the raw fuel and the steam supplied from the raw fuel supply means 2, and a reforming catalyst inside. And a reforming section for producing a fuel gas (hydrogen-containing gas) by reacting the mixed raw fuel with water vapor (see FIG. 2 described later). Further, the reformer 4 includes a vaporizer temperature sensor 22 for measuring the inlet temperature of the vaporizer.

  Further, in the fuel cell device (power generation unit) shown in FIG. 1, a heat exchanger 13 that performs heat exchange between exhaust gas (exhaust heat) generated by power generation of the fuel cell 1 and water, and condensation generated by heat exchange. A condensed water treatment device 19 for treating water and a condensed water supply pipe 21 for supplying the condensed water generated in the heat exchanger 13 to the condensed water treatment device 19 are provided. The treated condensed water is stored in the water tank 10 and then supplied to the reformer 4 by the water pump 11. In addition, the condensed water processing means (for example, ion exchange resin etc., not shown) for processing condensed water can be provided not only in the condensed water processing apparatus 19 but also in the condensed water supply pipe 21 and the like.

  On the other hand, when the amount of condensed water supplied to the condensed water treatment device 19 is small or when the purity of condensed water after being treated by the condensed water treatment means is low, water supplied from the outside (such as tap water) Can be processed into pure water and supplied to the reformer 4. In FIG. 1, each external water treatment device is provided as means for treating the water supplied from the outside into pure water.

  Here, as each external water treatment device for supplying water supplied from the outside to the reformer 4, the activated carbon filter device 7 for purifying water, the reverse osmosis membrane device 8, and purified water are purified. Among the devices of the ion exchange resin device 9 for making water, at least the ion exchange resin device 9 (preferably all devices) is provided. The pure water generated by the ion exchange resin device 9 is stored in the water tank 10. In the fuel cell device (power generation unit) shown in FIG. 1, a water supply valve 6 for adjusting the amount of water supplied from the outside is provided. Further, the condensed water treatment device 19 and the water tank 10 are connected by a tank connecting pipe 20. In the case where only condensed water is supplied to the reformer 4, the condensed water treatment device 19 and the reformer 4 can be connected via the water pump 11. The water treatment device referred to in the present invention means the above-described condensed water treatment device 19 and each external water treatment device for treating water supplied from the outside, and the fuel cell system shown in FIG. In, the structure provided with all the said water treatment apparatuses is shown.

  In addition, each external water treatment device and condensed water treatment device (water treatment device referred to in the present invention) for treating water supplied to the reformer 4 are surrounded by a one-dot chain line (note that the reformer 4). And the water supply pipe 5, the tank connecting pipe 20, and the condensed water supply pipe 21 that connect the water treatment apparatuses to each other.

  Further, the fuel cell device shown in FIG. 1 is provided with a power conditioner 12 for switching the DC power generated in the fuel cell 1 to AC power and supplying it to an external load, and a heat exchanger provided at the outlet of the heat exchanger 13. In addition to the outlet water temperature sensor 15 for measuring the temperature of the water flowing through the outlet 13 (circulated water stream), a control device 14 is provided, and a power generation unit is configured together with the circulation pump 16. The control device 14 will be described in detail later. And each apparatus which comprises these electric power generation units can be set as a fuel cell apparatus with easy installation, carrying etc. by accommodating in an exterior case (not shown). Although not shown, a raw fuel humidifier for humidifying the raw fuel may be provided between the raw fuel supply means 2 and the reformer 4. The hot water storage unit includes a hot water storage tank 18 for storing hot water after heat exchange.

  Further, an exhaust gas treatment device for treating the exhaust gas generated with the operation of the fuel cell 1 is provided between the fuel cell 1 and the heat exchanger 13 (not shown). In addition, the exhaust gas treatment apparatus houses exhaust gas treatment means in a storage container, and generally known combustion catalysts can be used as the exhaust gas treatment means.

  In addition, the arrow in a figure shows the flow direction of raw fuel, oxygen-containing gas, and water, and the broken line shows the main signal path | route transmitted to the control apparatus 14, or the main signal transmitted from the control apparatus 14. Signal paths are shown. The same components are denoted by the same reference numerals, and so on.

  Here, an operation method of the fuel cell device (system) shown in FIG. 1 will be described. In performing steam reforming to generate fuel gas used for power generation of the fuel cell 1, the main water (pure water) used in the reformer 4 is the heat exchanger 13 in the fuel cell 1. Condensed water generated by heat exchange between the exhaust gas generated during operation and the water flowing through the circulation pipe 17 is used. The condensed water generated in the heat exchanger 13 flows through the condensed water supply pipe 21 and is supplied to the condensed water treatment device 19. Condensed water (pure water) processed by the condensed water processing means (ion exchange resin or the like) provided in the condensed water processing device 19 is supplied to the water tank 10 via the tank connecting pipe 20. The water stored in the water tank 10 is supplied to the reformer 4 by the water pump 11, steam reforming is performed with the raw fuel supplied from the raw fuel supply means 2, and the generated fuel gas is used as a fuel cell. It is supplied to the cell 1. In the fuel cell 1, power generation is performed using the fuel gas and the oxygen-containing gas supplied from the oxygen-containing gas supply means 3. By the above method, the water self-sustaining operation can be performed by effectively using the condensed water.

  On the other hand, when the amount of condensed water produced is small, or when the purity of the condensed water treated by the condensed water treatment device 19 is low, water (such as tap water) supplied from the outside can be used.

  In this case, first, the water supply valve 6 (for example, an electromagnetic valve or an air drive valve) is opened, and water supplied from the outside such as tap water is supplied to the activated carbon filter 7 through the water supply pipe 5. The water treated with the activated carbon filter 7 is then supplied to the reverse osmosis membrane 8. The water treated by the reverse osmosis membrane 8 is continuously supplied to the ion exchange resin device 9, and pure water generated by being treated by the ion exchange resin device 9 is stored in the water tank 10. The pure water stored in the water tank 10 is used for power generation of the fuel cell 1 by the method described above.

  Further, in the fuel cell device (power generation unit), fuel gas is supplied to the fuel cell 1 through the reformer 4 as the fuel cell device is operated, and oxygen-containing gas is supplied from the oxygen-containing gas supply means 3. Is done.

  Subsequently, a fuel cell module (hereinafter sometimes abbreviated as a module) constituting the fuel cell device of the present invention will be described. FIG. 2 is an external perspective view showing an example of the module 23 constituting the fuel cell device of the present invention. The fuel cell device according to the present invention is configured by storing the module 23 in a room above an outer case partitioned vertically by a partition plate, and storing auxiliary equipment for operating the module 23 in a lower room. (Not shown).

  In the module 23 shown in FIG. 2, a columnar fuel cell 1 having a gas flow path (not shown) through which fuel gas flows is arranged inside the storage container 24 in an upright state, and adjacent to the storage container 24. The fuel cells 1 are electrically connected in series via current collecting members (not shown in FIG. 1), and the lower end of the fuel cells 1 is connected to an insulating bonding material (not shown) such as a glass sealant. The cell stack 26 (cell stack device 31) fixed to the manifold 25 is housed. At both ends of the cell stack 26, conductive members having current drawing portions for collecting and drawing the current generated by the power generation of the cell stack 26 (fuel cell 1) to the outside are arranged (FIG. Not shown).

  In FIG. 2, the fuel battery cell 1 is a hollow flat plate type having a gas flow path through which fuel gas (hydrogen-containing gas) flows in the longitudinal direction. A solid oxide fuel cell 1 in which a side electrode layer, a solid electrolyte layer, and an oxygen side electrode layer are sequentially laminated is illustrated.

  Further, in FIG. 2, in order to obtain a fuel gas to be used for power generation of the fuel cell 1, a fuel gas obtained by reforming a raw fuel (raw fuel) such as natural gas supplied via the raw fuel supply pipe 30 Is formed above the cell stack 26 (fuel cell 1). The reformer 4 preferably has a structure capable of performing steam reforming, which is an efficient reforming reaction, and a reforming unit 27 for vaporizing water and reforming raw fuel into fuel gas. And a reforming section 28 in which a reforming catalyst (not shown) is disposed. In addition, the vaporization unit temperature sensor 22 described above is connected to the vaporization unit 27.

  In FIG. 2, the water supply pipe 5 for supplying water to the vaporizing unit 27 is omitted, and the raw fuel supply pipe 30 and the water supply pipe 5 are connected to the reformer 4 as separate pipes. In addition, the raw fuel supply pipe 30 and the water supply pipe 5 may be a double pipe.

  The fuel gas generated by the reformer 4 is supplied to the manifold 25 through the fuel gas flow pipe 29 and is supplied from the manifold 25 to a gas flow path provided inside the fuel cell 1. The configuration of the cell stack device 31 can be changed as appropriate depending on the type and shape of the fuel cell 1. For example, the reformer 4 can be included in the cell stack device 31.

  Further, FIG. 2 shows a state in which a part (front and rear surfaces) of the storage container 24 is removed and the cell stack device 31 stored inside is taken out rearward. Here, in the module 23 shown in FIG. 2, the cell stack device 31 can be slid and stored in the storage container 24.

  The storage container 24 is arranged between cell stacks 26 juxtaposed on the manifold 25, and oxygen-containing gas (oxygen-containing gas) is directed from the lower end portion toward the upper end portion of the fuel cell 1. An oxygen-containing gas introduction member 34 is arranged to flow.

  Here, it is possible to raise the temperature of the fuel cell 1 by burning excess fuel gas and oxygen-containing gas discharged from the gas flow path of the fuel cell 1 on the upper end side of the fuel cell 1. And the activation of the cell stack device 31 can be accelerated. In addition, the reformer 4 disposed above the fuel cell 1 (cell stack 26) can be warmed, and the reformer 4 can efficiently perform the reforming reaction.

  By the way, in the fuel cell apparatus as described above, when the water pump 11 for supplying water to the reformer 4 fails, water cannot be supplied to the reformer 4, so The temperature of the mass portion 28 increases. In this case, the raw fuel such as natural gas supplied to the reforming unit 28 is decomposed, so that carbon deposition occurs and the fuel cell 1 may be deteriorated. Therefore, the flow meter for measuring the amount of water supplied to the reformer 4 by the water pump 11 is provided, and the signal transmitted to the water pump 11 by the control device 14 (signal for controlling the operation of the water pump 11); It is conceivable to detect a failure of the water pump 11 by comparing with the amount of water measured by the flow meter. However, in this case, the flow meter is indispensable, and there is a problem that costs are increased.

  Therefore, in the present invention, the control device 14 controls the water pump 11 so that the inlet temperature of the vaporization unit 27 measured by the vaporization unit temperature sensor 22 falls within a predetermined temperature range.

  That is, when the inlet temperature of the vaporization unit 27 is higher than the predetermined temperature range, the control device 14 transmits a signal for increasing the amount of water supplied from the water pump 11 to the water pump 11. Thereby, the evaporation amount of water, which is an endothermic reaction, increases, so that the inlet temperature of the vaporizing section 27 can be lowered to be within a predetermined temperature range.

  On the other hand, when the inlet temperature of the vaporization unit 27 is lower than the predetermined temperature range, the control device 14 transmits a signal for reducing the amount of water supplied from the water pump 11 to the water pump 11. Thereby, the evaporation amount of water, which is an endothermic reaction, is reduced, so that the inlet temperature of the vaporization section 27 can be raised and within a predetermined temperature range.

  As a result, a sufficient amount of water for the reforming reaction in the reformer 4 can be supplied to the vaporization unit 27, and decomposition of raw fuel such as natural gas can be suppressed. Therefore, carbon deposition can be suppressed, and deterioration of the fuel battery cell 1 can be suppressed.

  Further, since the amount of water supplied to the vaporizing unit 27 can be controlled based on the inlet temperature of the vaporizing unit 27 measured by the vaporizing unit temperature sensor 22, the amount of water supplied to the vaporizing unit 27 is measured. Therefore, the reforming reaction in the reformer 4 can be controlled without providing a flow meter for this purpose. Thereby, the cost of the fuel cell device can be reduced.

  The predetermined temperature range at the inlet temperature of the vaporization unit 27 can be set as appropriate based on the size of the reformer 4, the type of reforming catalyst in the reforming unit 28, etc. It is preferable to set the temperature so that the steam reforming reaction can be performed and the reforming catalyst does not cause deterioration or the like. For example, the temperature can be appropriately set in the range of 100 ° C to 250 ° C.

  Here, the control device 14 controls the operation of the water pump 11 so that the inlet temperature of the vaporization unit 27 falls within a predetermined temperature range, but at a temperature at which the inlet temperature of the vaporization unit 27 exceeds the predetermined temperature range for a predetermined time. When continuing, it determines with the water pump 11 having failed. In this case, if the failed water pump is continuously operated, water cannot be supplied to the reformer 4, so that the temperatures of the vaporization unit 27 and the reforming unit 28 rise, and natural gas or the like Carbon decomposition may occur due to decomposition of the fuel, and the fuel cell 1 may be deteriorated.

  Therefore, when the inlet temperature of the vaporization unit 27 continues for a predetermined time at a temperature exceeding a predetermined temperature range, the control device 14 preferably stops the water pump 11.

  However, in this case, the reformer 4 cannot perform steam reforming. Therefore, the fuel cell device of the present invention further includes an oxygen-containing gas supply means for supplying the oxygen-containing gas to the vaporization unit 27, and the control device 14 determines that the inlet temperature of the vaporization unit 27 falls within a predetermined temperature range. In the case of continuing for a predetermined time at a temperature exceeding, it is preferable to control the reforming unit 28 to perform partial oxidation reforming. The oxygen-containing gas supply means can be used in combination with the oxygen-containing gas supply means 3 for supplying the oxygen-containing gas to the fuel cell 1 shown in FIG.

  That is, the control device 14 controls the operation of the water pump 11 to stop, and controls the raw fuel supply means 2 and the oxygen-containing gas supply means 3 so that the reforming unit 28 performs partial oxidation reforming. As a result, even when the water pump 11 fails, the raw fuel can be continuously reformed by the reformer 4 (the reforming unit 28), so that the fuel cell device can be continuously operated. it can.

  Note that the inlet temperature of the vaporization unit 27 measured by the vaporization unit temperature sensor 22 continues for a predetermined time at a temperature exceeding a predetermined temperature range means that the size of the reformer 4 and the type of reforming catalyst in the reforming unit 28 For example, the temperature exceeding the above-described temperature range can be set for 3 minutes or longer.

  By the way, when the control device 14 determines that the water pump 11 has failed, it is preferable to indicate that the water pump 11 has failed. In particular, when the reforming reaction in the reforming unit 28 is changed to the partial oxidation reforming reaction as described above, the fuel cell device can be operated, but the reforming efficiency of the partial reforming reaction is the steam reforming. Since it is lower than the reaction, it is preferable that the failure of the water pump 11 can be easily known.

  Therefore, the fuel cell device of the present invention further includes an alarm device that notifies the failure of the water pump 11, and the control device 14 is predetermined at a temperature measured by the vaporization part temperature sensor 22 exceeding a predetermined temperature range. It is preferable to activate the alarm device when the time continues. Thereby, the failure of the water pump 11 can be easily notified.

  Note that the inlet temperature of the vaporization unit 27 measured by the vaporization unit temperature sensor 22 continues for a predetermined time at a temperature exceeding a predetermined temperature range means that the size of the reformer 4 and the type of reforming catalyst in the reforming unit 28 For example, the temperature exceeding the above-described temperature range can be set for 3 minutes or longer. In addition, when the reforming method in the reformer 4 is changed from steam reforming to partial oxidation reforming, the control device 14 can also activate the alarm device simultaneously with changing the reforming method.

  As described above, the control device 14 controls the operation of the water pump 11 so that the inlet temperature of the vaporization unit 27 measured by the vaporization unit temperature sensor 22 is within a predetermined temperature range. 14 detects the failure of the water pump 11, changes the reforming method in the reforming unit 28, and activates an alarm device that notifies the failure of the water pump 11. The alarm device can be normally stopped by a person using the fuel cell device of the present invention. However, if the operation of the alarm device is not stopped for a predetermined time or longer, the manufacturing device 14 operates the fuel cell device. Is preferably stopped.

  In this case, when the control device 14 performs control to stop the operation of the fuel cell device, it is possible to suppress the operation from continuing while the fuel cell device is out of order and to improve safety.

  In the case where the reforming method in the reforming unit 28 is changed from steam reforming to partial oxidation reforming, the control device 14 stops the operation of the fuel cell device, so that the reforming efficiency is low. The driving method can be stopped.

  The case where the operation of the alarm device is not stopped for a predetermined time or more can be, for example, a case where the alarm device is continuously operated for 15 minutes or more.

  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, the fuel cell 1 may be a hollow flat plate type having a gas flow path in which an oxygen-containing gas flows in the longitudinal direction. Also in this case, by performing the control as described above, carbon deposition can be suppressed, deterioration of the fuel cell 1 can be suppressed, and cost can be reduced.

It is a block diagram which shows an example of a structure of the fuel cell apparatus of this invention. It is an external appearance perspective view which shows an example of the fuel cell module in the fuel cell apparatus of this invention.

Explanation of symbols

1: Fuel cell 2: Raw fuel supply means 3: Oxygen-containing gas supply means 4: Reformer 14: Controller 22: Vaporization part temperature sensor 27: Vaporization part 28: Reformation part

Claims (4)

  A fuel cell, a reformer including a reforming unit including a reforming unit including a vaporization unit and a reforming catalyst for generating fuel gas to be supplied to the fuel cell by steam reforming, and supplying raw fuel to the vaporization unit Raw fuel supply means for generating water, a water treatment device for generating water to be supplied to the vaporization unit, a water pump for supplying water generated by the water treatment device to the vaporization unit, and the vaporization A vaporization unit temperature sensor for measuring the inlet temperature of the unit, and a control device for controlling the water pump so that the inlet temperature of the vaporization unit measured by the vaporization unit temperature sensor falls within a predetermined temperature range. A fuel cell device comprising:   When oxygen-containing gas supply means for supplying oxygen-containing gas to the vaporizer is further provided, and the inlet temperature of the vaporizer measured by the vaporizer temperature sensor continues for a predetermined time at a temperature exceeding a predetermined temperature range In addition, the control device controls the operation of the water pump to stop and controls the raw fuel supply means and the oxygen-containing gas supply means so as to perform partial oxidation reforming in the reforming section. The fuel cell device according to claim 1, wherein:   The control device further comprises an alarm device for notifying the failure of the water pump, and when the inlet temperature of the vaporizer measured by the vaporizer temperature sensor continues for a predetermined time at a temperature exceeding a predetermined temperature range, The fuel cell device according to claim 1, wherein an alarm device is activated. 4. The fuel cell according to claim 3, wherein after the alarm device is activated, the control device stops the operation of the fuel cell device when the operation of the alarm device is not stopped for a predetermined time or more. apparatus.

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