JP2007265777A - Fuel cell power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell power generation device capable of stably generating a fuel gas regardless of elapse of an operation time. <P>SOLUTION: A control means C is provided with output-to-combustion chamber temperature information obtained by predetermining the target combustion chamber temperature of a combustion chamber 6 in response to the value of target output of a fuel cell G. The control means C is structured to be freely changed over to a reforming adjustment mode, and is structured such that, in the reforming adjustment mode, the supply amount of a material fuel to a reform chamber 3 is adjusted and kept to set the power generation output of the fuel cell G at a parameter correcting target value, and, by changing and adjusting the supply amount of a burning fuel to a reform burner 17 to obtain the temperature of the combustion chamber 6 for setting the temperature of the reform chamber 3 at a set appropriate value based on detection information of a reform chamber temperature detection means Tr and detection information of a combustion chamber temperature detection means Tf, the output-to-combustion chamber temperature information is corrected based on the obtained temperature of the combustion chamber 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention comprises a reforming chamber that generates a reforming treatment gas containing hydrogen gas as a main component by reforming a supplied hydrocarbon-based raw fuel and steam, and a combustion fuel in a reforming burner. A combustion gas generating section for generating a fuel gas mainly composed of hydrogen gas, comprising a combustion chamber that is combusted and heated so that the reforming chamber can be subjected to a reforming process;
A fuel cell that is supplied with the fuel gas generated in the fuel gas generator and generates power;
Control means for controlling the operation,
In the normal operation mode, the control means adjusts the amount of raw fuel supplied to the reforming chamber so as to adjust the power generation output of the fuel cell to the target output, and the temperature of the reforming chamber is set appropriately. The present invention relates to a fuel cell power generator configured to adjust a supply amount of combustion fuel to the reforming burner so as to reach a temperature.

Such a fuel cell power generation apparatus heats the reforming chamber so that the reforming chamber can be reformed by burning the fuel for combustion in the reforming burner, and in such a state that the reforming is performed. In the chamber, a fuel gas mainly composed of hydrogen gas is generated by reforming the supplied hydrocarbon-based raw fuel and steam to produce a reformed gas mainly composed of hydrogen gas. The generated fuel gas is supplied to the fuel cell, and the fuel cell is configured to generate electric power.
In the normal operation mode, the amount of raw fuel supplied to the reforming chamber is adjusted so that the power generation output of the fuel cell is adjusted to the target output, and the temperature of the reforming chamber is set to the set appropriate temperature. The supply amount of the fuel for combustion to the reforming burner is adjusted.

  In such a fuel cell power generation device, conventionally, a reforming temperature sensor for detecting the temperature of the reforming chamber is provided, and the temperature of the reforming chamber becomes a set appropriate temperature based on detection information of the reforming temperature sensor. In this way, the supply amount of the fuel for combustion to the reforming burner is adjusted (see, for example, Patent Document 1).

JP 2005-219991 A

  By the way, in such a fuel cell power generation device, the heat generated by burning the fuel for combustion in the reforming burner in the combustion chamber is transferred to the reforming chamber, so that the reforming chamber reaches a set appropriate temperature. Even if the amount of combustion fuel supplied to the reforming burner is changed and adjusted, the change adjustment of the amount of fuel supplied to the reforming burner is reflected in the temperature change in the reforming chamber. Takes a long time, and the responsiveness of adjusting the temperature of the reforming chamber by changing and adjusting the amount of fuel supplied to the reforming burner is low.

Conventionally, based on the detection information of the reforming temperature sensor that detects the temperature of the reforming chamber, the amount of fuel supplied to the reforming burner is adjusted so that the temperature of the reforming chamber becomes the set appropriate temperature. Therefore, even if the supply amount of the fuel for combustion to the reforming burner is changed and adjusted to cope with the temperature fluctuation as the temperature of the reforming chamber fluctuates, Since the responsiveness of the temperature adjustment of the reforming chamber by adjusting the supply amount of combustion fuel is low, it takes time until the temperature of the reforming chamber is adjusted. There is a tendency for the fuel supply amount to be changed and adjusted excessively. Accordingly, if the change and adjustment of the amount of fuel supplied to the reforming burner is excessively performed in this way, the temperature of the reforming chamber tends to fluctuate, so that the reforming process of the raw fuel in the reforming chamber is stabilized. However, there is a problem that it is difficult to stably generate the fuel gas.
Incidentally, when the reforming process of the raw fuel in the reforming chamber becomes unstable, the composition of the reforming process gas tends to fluctuate, and it becomes difficult to maintain the composition of the fuel gas appropriately.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a fuel cell power generator capable of stably generating fuel gas regardless of the operating time.

A fuel cell power generator according to the present invention includes a reforming chamber that generates a reforming treatment gas containing hydrogen gas as a main component by reforming a supplied hydrocarbon-based raw fuel and water vapor, and a reforming burner. Combustion fuel is burned and a combustion chamber that heats the reforming chamber so that it can be reformed is arranged side by side so that heat can be transferred, and fuel gas generation that generates fuel gas mainly composed of hydrogen gas And
A fuel cell that is supplied with the fuel gas generated in the fuel gas generator and generates power;
Control means for controlling the operation,
In the normal operation mode, the control means adjusts the amount of raw fuel supplied to the reforming chamber so as to adjust the power generation output of the fuel cell to the target output, and the temperature of the reforming chamber is set appropriately. It is configured to adjust the amount of fuel supplied to the reforming burner so as to reach a temperature,
The first characteristic configuration is provided with reforming chamber temperature detection means for detecting the temperature of the reforming chamber and combustion chamber temperature detection means for detecting the temperature of the combustion chamber,
In the normal operation mode, the control means outputs a predetermined combustion chamber temperature information for the combustion chamber according to the magnitude of the target output of the fuel cell, and the target output of the fuel cell. The target combustion chamber temperature is obtained based on the combustion chamber temperature detection means, and based on the detection information of the combustion chamber temperature detection means, the combustion fuel to the reforming burner is set so that the temperature of the combustion chamber becomes the obtained target combustion chamber temperature. And is configured to adjust the supply amount of
It is configured to be switchable to the reforming adjustment mode, and in the reforming adjustment mode, the amount of raw fuel supplied to the reforming chamber is set so that the power generation output of the fuel cell becomes the target output for parameter correction. The combustion for adjusting and maintaining the temperature of the reforming chamber to the set appropriate temperature based on the detection information of the reforming chamber temperature detection means and the detection information of the combustion chamber temperature detection means In order to obtain the temperature of the chamber, the supply amount of the fuel for combustion to the reforming burner is changed and adjusted, and the output versus combustion chamber temperature information is corrected based on the obtained temperature of the combustion chamber. It is characterized by that.

That is, in the normal operation mode, the target combustion chamber temperature is determined based on output-combustion chamber temperature information in which the target combustion chamber temperature of the combustion chamber according to the magnitude of the target output of the fuel cell is predetermined and the target output of the fuel cell. The temperature is obtained, and the amount of combustion fuel supplied to the reforming burner is adjusted based on the detection information of the combustion chamber temperature detecting means so that the temperature of the combustion chamber becomes the calculated target combustion chamber temperature.
In addition, when switching to the reforming adjustment mode, the supply amount of raw fuel to the reforming chamber is adjusted so that the power generation output of the fuel cell becomes the target output for parameter correction. To improve the temperature of the combustion chamber so that the temperature of the reforming chamber becomes the set appropriate temperature based on the detection information of the reforming chamber temperature detection means and the detection information of the combustion chamber temperature detection means. The supply amount of the combustion fuel to the quality burner is changed and adjusted, and the output-combustion chamber temperature information is corrected based on the obtained combustion chamber temperature.

In other words, as the target output of the fuel cell increases, the amount of reforming treatment in the reforming chamber increases, so in order to maintain the temperature of the reforming chamber at the set appropriate temperature, supply of combustion fuel to the reforming burner The amount is increased to raise the temperature of the combustion chamber, and there is a predetermined relationship between the target output of the fuel cell and the temperature of the combustion chamber for setting the reforming chamber to a set appropriate temperature.
If the supply amount of the combustion fuel to the reforming burner is changed and adjusted, the change adjustment of the combustion fuel supply amount is immediately reflected in the change adjustment of the temperature of the combustion chamber. Responsiveness of the temperature control of the combustion chamber by changing the fuel supply amount.

Therefore, the relationship between the magnitude of the target output of the fuel cell and the temperature of the combustion chamber for setting the reforming chamber to the set appropriate temperature is determined in advance as output versus combustion chamber temperature information.
In the normal operation mode, the target combustion chamber temperature is obtained based on the output versus combustion chamber temperature information and the target output of the fuel cell, and the combustion chamber temperature is obtained based on the detection information of the combustion chamber temperature detection means. Of combustion chamber temperature adjustment by adjusting the amount of fuel supplied to the reformer burner by adjusting the amount of fuel supplied to the reformer burner so that the target combustion chamber temperature reaches the target temperature Therefore, it is possible to prevent excessive change and adjustment of the amount of fuel supplied for combustion to the reforming burner. In addition, in this way, it is possible to prevent the change and adjustment of the fuel supply amount for combustion to the reforming burner from being excessively performed, so that the temperature of the combustion chamber is set to the setting appropriate temperature. Therefore, it is easy to maintain the reforming chamber temperature at the set appropriate temperature by suppressing the temperature fluctuation of the reforming chamber, and to stabilize the reforming process in the reforming chamber. it can.

  By the way, the reforming chamber is filled with a reforming reaction catalyst, and the catalytic activity of the reforming reaction catalyst and the charging state of the reforming reaction catalyst vary with the passage of operation time. There is a possibility that the temperature of the combustion chamber for setting the reforming chamber to the set appropriate temperature may change as the operation time elapses.

Therefore, the amount of raw fuel supplied to the reforming chamber is configured so that it can be switched to the reforming adjustment mode, and in the reforming adjustment mode, the power generation output of the fuel cell is set to the target output for parameter correction. In this state, the amount of fuel supplied to the reforming burner is changed and adjusted, and the detection information of the reforming chamber temperature detection means and the detection information of the combustion chamber temperature detection means during the change adjustment Based on the above, the temperature of the combustion chamber for setting the temperature of the reforming chamber to the set appropriate temperature is obtained.
That is, it is possible to obtain the temperature of the combustion chamber for heating the reforming chamber so that the reforming process can be performed while maintaining the amount of raw fuel corresponding to the target output for parameter correction of the fuel cell at the set appropriate temperature. it can.

  Then, when the output-to-combustion chamber temperature information is corrected based on the temperature of the combustion chamber thus obtained, the output reflecting the catalytic activity of the reforming reaction catalyst and the filling state of the reforming reaction catalyst at that time It can be used as combustion chamber temperature information.

In the subsequent normal operation mode, the target combustion chamber temperature of the combustion chamber corresponding to the magnitude of the target output of the fuel cell is obtained based on the output-combustion chamber temperature information corrected in the reforming adjustment mode. By controlling the amount of fuel supplied to the reforming burner so that the combustion chamber temperature reaches the target combustion chamber temperature, the temperature fluctuation of the reforming chamber is suppressed regardless of the operating time. Thus, the temperature of the reforming chamber can be easily maintained at the set appropriate temperature, the reforming process in the reforming chamber can be stabilized, and the generation of fuel gas can be stabilized.
Incidentally, by stabilizing the reforming process in the reforming chamber, the composition of the reforming process gas can be stabilized, and the composition of the fuel gas can be maintained appropriately.
Therefore, it has become possible to provide a fuel cell power generator capable of stably generating fuel gas regardless of the passage of operating time.

In addition to the first feature configuration, the second feature configuration is
A selective oxidation chamber that selectively oxidizes carbon monoxide in the reforming process gas reformed in the reforming chamber with selective oxidation air supplied by a selective oxidation blower, and the selective oxidation thereof And a selective oxidation chamber temperature detecting means for detecting the chamber temperature,
In the normal operation mode, the control means outputs a predetermined oxidation target air flow rate information in accordance with a target output magnitude of the fuel cell, and a target output of the fuel cell. And the rotational speed of the selective oxidation blowing means is adjusted so that the flow rate of the selective oxidation air supplied to the selective oxidation chamber becomes the calculated target flow rate. ,as well as,
The supply amount of the raw fuel to the reforming chamber is configured to be switchable to the selective oxidation adjustment mode, and in the selective oxidation adjustment mode, the power generation output of the fuel cell is set to the target output for parameter correction. The selective oxidation is performed in order to obtain the flow rate of the selective oxidation air for setting the temperature of the selective oxidation chamber to the set appropriate temperature based on the detection information of the selective oxidation chamber temperature detecting means. The rotational speed of the air blowing means is changed and adjusted, and the output vs. selective oxidation air flow rate information is corrected based on the obtained flow rate of selective oxidation air.

  That is, in the selective oxidation chamber, carbon monoxide in the reformed gas that has been reformed in the reforming chamber is selectively oxidized by the selective oxidizing air supplied by the selective oxidizing air blowing means. A fuel gas having a smaller carbon monoxide gas content can be produced.

In the normal operation mode, the target flow rate of the selective oxidation air corresponding to the magnitude of the target output of the fuel cell is determined based on the predetermined output versus selective oxidation air flow rate information and the target output of the fuel cell. The flow rate is obtained, and the rotational speed of the selective oxidation blower is adjusted so that the flow rate of the selective oxidation air supplied to the selective oxidation chamber becomes the obtained target flow rate.
In addition, when switching to the selective oxidation adjustment mode, in the selective oxidation adjustment mode, the amount of raw fuel supplied to the reforming chamber is adjusted so that the power generation output of the fuel cell becomes the target output for parameter correction. The rotational speed of the selective oxidation blower means is maintained in order to obtain the flow rate of the selective oxidation air for maintaining the temperature of the selective oxidation chamber at the set appropriate temperature based on the detection information of the selective oxidation chamber temperature detection means. By changing and adjusting, the output versus selective oxidation air flow rate information is corrected based on the obtained flow rate of selective oxidation air.

In other words, when the target output of the fuel cell increases, the amount of the reforming process gas to be selectively oxidized in the selective oxidation chamber increases, so it is necessary to increase the flow rate of the selective oxidation air supplied to the selective oxidation chamber. There is a predetermined relationship between the target output of the fuel cell and the flow rate of the selective oxidation air for appropriately performing the selective oxidation treatment.
Therefore, the relationship between the target output of such a fuel cell and the flow rate of the selective oxidation air for appropriately performing the selective oxidation process is determined in advance as output versus selective oxidation air flow rate information.
In the normal operation mode, the target flow rate is obtained based on the output versus selective oxidation air flow rate information and the target output of the fuel cell, and the flow rate of the selective oxidation air to the selective oxidation chamber becomes the obtained target flow rate. Thus, by adjusting the rotational speed of the selective oxidation blowing means, the selective oxidation treatment in the selective oxidation chamber can be appropriately performed in accordance with the change adjustment of the target output of the fuel cell.

By the way, the flow rate adjustment of the selective oxidation air supplied to the selective oxidation chamber is performed by, for example, predetermining the relationship between the rotational speed and the blowing amount in the selective oxidation blowing means for supplying the selective oxidation air to the selective oxidation chamber. Based on the relationship, the flow rate of the selective oxidation air blowing means is adjusted, or a flow meter for detecting the flow rate of the selective oxidation air supplied to the selective oxidation chamber is provided. Based on this, the rotational speed of the selective oxidation blowing means is adjusted.
However, as the operating time elapses, the characteristics of the selective oxidation blowing means and the flowmeter may change, and even if the control conditions of the selective oxidation blowing means are the same, they are supplied to the selective oxidation chamber. The actual flow rate of selective oxidation air may fluctuate.

  On the other hand, in order to appropriately perform the selective oxidation treatment in the selective oxidation chamber, it is necessary to maintain the temperature of the selective oxidation chamber at a predetermined set appropriate temperature.

  Therefore, the control mode can be switched to the selective oxidation adjustment mode. In the selective oxidation adjustment mode, the amount of raw fuel supplied to the reforming chamber is set so that the power generation output of the fuel cell becomes the target output for parameter correction. Adjusting and maintaining the rotational speed of the selective oxidation blowing means, and adjusting the temperature of the selective oxidation chamber based on the detection information of the selective oxidation chamber temperature detection means during the change adjustment The flow rate of the selective oxidation air to obtain the temperature is obtained. By the way, when adjusting the flow rate of selective oxidation air to the selective oxidation chamber based on the relationship between the rotational speed and the amount of blown air in the selective oxidation blowing means, the selection for setting the temperature of the selective oxidation chamber to the set appropriate temperature The flow rate of the oxidizing air is obtained by substituting the rotational speed of the selective oxidizing air blowing means, and when the flow rate of the selective oxidizing air to the selective oxidizing chamber is adjusted based on the detection information of the flow meter, The flow rate of the selective oxidation air for setting the temperature to the set appropriate temperature is obtained from the detected value of the flow meter.

  That is, the flow rate of the selective oxidizing air for appropriately selectively oxidizing the reformed gas generated by reforming the amount of raw fuel corresponding to the target output for parameter correction of the fuel cell can be obtained. .

  Then, based on the flow rate of the selective oxidation air for setting the temperature of the selective oxidation chamber thus obtained to the set appropriate temperature, if the output versus selective oxidation air flow rate information is corrected, the selective oxidation air flow at that time is corrected. It is possible to obtain output versus selective oxidation air flow rate information reflecting the characteristics of the means and the characteristics of the flowmeter.

In the subsequent normal operation mode, the flow rate of the selective oxidation air corresponding to the magnitude of the target output of the fuel cell is obtained based on the output versus selective oxidation air flow rate information corrected in the selective oxidation adjustment mode. Thus, by adjusting the rotational speed of the selective oxidation blowing means so that the flow rate of the selective oxidation air supplied to the selective oxidation chamber becomes the determined flow rate, in the selective oxidation chamber, regardless of the elapsed time of operation. The selective oxidation treatment can be appropriately performed according to the target output of the fuel cell.
Therefore, it is possible to stably produce the fuel gas having a smaller carbon monoxide gas content regardless of the operation time.

In addition to the first or second feature configuration, the third feature configuration is
In the normal operation mode, the control means supplies combustion air to the reforming burner according to a target output level of the fuel cell or a supply amount of combustion fuel to the reforming burner. A target rotational speed based on predetermined output versus rotational speed information and a target output of the fuel cell or a supply amount of combustion fuel to the reforming burner, and the combustion air flow Configured to adjust the target rotational speed determined means; and
It is configured to be switchable to a combustion adjustment mode, and in the combustion adjustment mode, the supply amount of raw fuel to the reforming chamber is adjusted so that the power generation output of the fuel cell becomes the target output for parameter correction. And maintaining the combustion chamber temperature at the target combustion chamber temperature determined based on the output versus combustion chamber temperature information and the parameter correction target output. In order to determine the rotational speed of the combustion air blowing means for maintaining the supply amount in an adjusted state and making the temperature of the combustion chamber maximum or substantially maximum based on the detection information of the combustion chamber temperature detection means The rotation speed of the combustion air blowing means is changed and adjusted, and the output-rotation speed information is corrected based on the obtained rotation speed of the combustion air blowing means.

That is, in the normal operation mode, the target rotational speed of the combustion blower means for supplying combustion air to the reforming burner according to the target output level of the fuel cell or the amount of fuel supplied to the reforming burner is set. The target rotational speed is obtained based on the predetermined output versus rotational speed information and the target output of the fuel cell or the amount of fuel supplied to the reformer burner, and the combustion blowing means is adjusted to the obtained target rotational speed. To do.
When switching to the combustion adjustment mode, the supply amount of the raw fuel to the reforming chamber is adjusted and maintained so that the power generation output of the fuel cell becomes the target output for parameter correction. In addition, the amount of combustion fuel supplied to the reformer burner is adjusted so that the temperature of the combustion chamber becomes the target combustion chamber temperature obtained based on the output versus combustion chamber temperature information and the target output for parameter correction. The rotation speed of the combustion air blowing means is changed in order to obtain the rotation speed of the combustion air blowing means for maintaining or maximizing the temperature of the combustion chamber based on the detection information of the combustion chamber temperature detection means. Adjustment is made to correct the output versus rotational speed information based on the determined rotational speed of the combustion air blowing means.

That is, when the target output of the fuel cell increases, the amount of fuel supplied to the reformer burner for maintaining the temperature of the combustion chamber at the target combustion chamber temperature corresponding to the target output of the fuel cell increases. Therefore, it is necessary to increase the amount of combustion air supplied to the reformer burner, the target output size of the fuel cell or the amount of fuel supplied to the reformer burner, and the fuel for combustion to the reformer burner There is a predetermined relationship between the rotational speed of the combustion air blowing means for supplying the combustion air in an amount corresponding to the supply amount.
By the way, when the reforming burner is burned in the combustion chamber, combustion is performed so that the temperature of the combustion chamber becomes as high as possible, but the combustion is stabilized and the reforming chamber is appropriately heated to reach the set appropriate temperature. For this reason, it is preferable to set the amount of combustion air supplied to the reforming burner so that the temperature of the combustion chamber is as high as possible.
Therefore, in order to supply combustion air in an amount corresponding to the target output size of such a fuel cell or the amount of fuel supplied to the reformer burner and the amount of fuel supplied to the reformer burner. The relationship with the rotational speed of the combustion air blowing means is determined in advance as output versus rotational speed information in a state where the combustion chamber can be heated so that its temperature becomes as high as possible.

  In the normal operation mode, the target rotational speed is obtained based on the output versus rotational speed information and the target output of the fuel cell, and the rotational speed of the combustion blower is adjusted so as to be the obtained target rotational speed. Thus, according to the change adjustment of the target output of the fuel cell, it is possible to supply an amount of combustion air corresponding to the amount of fuel supplied to the reforming burner, and to set the temperature of the combustion chamber of the fuel cell. The target combustion chamber temperature corresponding to the target output can be maintained.

  By the way, there is a possibility that the characteristics of the combustion air blowing means may fluctuate as the operation time elapses, and the actual supply of combustion air supplied to the reforming burner even if the control conditions of the combustion air blowing means are the same. The amount may vary.

  On the other hand, whether or not the supply amount of combustion air is an appropriate amount set in advance with respect to the supply amount of combustion fuel to the reformer burner can be determined from the temperature of the combustion chamber. If the amount is appropriate, the temperature of the combustion chamber is the highest.

Therefore, it is configured to be switchable to the combustion adjustment mode, and in the combustion adjustment mode, the amount of raw fuel supplied to the reforming chamber is adjusted so that the power generation output of the fuel cell becomes the target output for parameter correction. The amount of combustion fuel supplied to the reformer burner is adjusted so that the combustion chamber temperature becomes the target combustion chamber temperature obtained based on the output versus combustion chamber temperature information and the target output for parameter correction. In such a state, the rotational speed of the combustion air blowing means is changed and adjusted, and the temperature of the combustion chamber is made highest or substantially highest based on the detection information of the combustion chamber temperature detecting means during the change and adjustment. The rotational speed of the combustion air blowing means is obtained.
That is, the combustion air blowing means that can supply the optimum or substantially optimum amount of combustion air to the amount of combustion fuel supplied to the reforming burner according to the target output for parameter correction of the fuel cell. The rotation speed can be obtained.

  Then, if the output-to-rotational speed information is corrected based on the rotational speed of the combustion air blowing means for making the temperature of the combustion chamber the highest or substantially the highest, the characteristics of the combustion air blowing means at that time Can be output vs. rotational speed information.

In the subsequent normal operation mode, the fuel cell target output magnitude or the amount of combustion fuel supplied to the reformer burner is determined based on the output versus rotational speed information corrected in the combustion adjustment mode. By obtaining the target rotational speed and adjusting the combustion air blowing means so that the obtained target rotational speed is obtained, the combustion fuel supplied to the reformer burner is improved regardless of the elapsed time. In order to stably burn the quality burner and appropriately heat the reforming chamber, an appropriate amount of combustion air can be supplied, and the reforming process can be stabilized.
Therefore, the reforming process in the reforming chamber can be further stabilized regardless of the elapse of the operation time, and the generation of fuel gas can be further stabilized.

In addition to the third feature configuration, the fourth feature configuration is
The target output for parameter correction is set in a plurality of stages.

  That is, the reforming adjustment mode and the combustion adjustment mode, respectively, or the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode, respectively, each of target outputs for parameter correction in a plurality of stages. Therefore, the output versus combustion chamber temperature information and the output versus rotational speed information, or the output versus combustion chamber temperature information, the output versus selective oxidation air flow rate information, and the output versus rotational speed information, respectively. It can be appropriately corrected over the target output of a wider range of fuel cells.

And the output-combustion chamber temperature information and output-rotation speed information appropriately corrected over the target output of such a wider range of fuel cells, or the output-combustion chamber temperature information, the output-comparison air flow information for selective oxidation, and By operating the fuel gas generation unit using the output vs. rotational speed information, the reforming process in the reforming chamber can be stabilized at the target output of a wider range of fuel cells regardless of the elapsed operating time. In addition, the selective oxidation treatment in the selective oxidation chamber can be stabilized.
Therefore, the fuel gas can be generated more stably regardless of the elapse of the operation time, and the fuel gas having a smaller carbon monoxide gas content can be generated more stably. Can now.

In addition to the third or fourth feature configuration, the fifth feature configuration includes:
When the control means executes the reforming adjustment mode, the control means is configured to execute the reforming adjustment mode after executing the combustion adjustment mode.

  That is, since the reforming adjustment mode is executed after the combustion adjustment mode is executed, the target rotation speed is obtained based on the output versus rotation speed information corrected by the combustion adjustment mode, and the obtained target The reforming adjustment mode is executed in a state in which the rotation speed of the combustion air blowing means is adjusted so as to achieve the rotation speed.

That is, since the reforming adjustment mode is performed in a state in which the supply amount of the combustion air can be adjusted so as to stabilize the combustion of the reforming burner, the output versus combustion chamber temperature information can be corrected. The output versus combustion chamber temperature information can be more appropriately corrected.
Therefore, it is possible to further stabilize the generation of fuel gas regardless of the operation time.

In addition to any of the third to sixth feature configurations described above, the sixth feature configuration is
The control means determines a parameter correction timing based on the operation progress information, and at the parameter correction timing, at least one of the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode. It is characterized in that it is configured to perform one.

That is, it is determined whether or not the parameter correction timing is reached based on the operation progress information. When the parameter correction timing is reached, the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode are selected. At least one is executed automatically.
In other words, it is unnecessary by configuring so that when it is time to execute any one of the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode, it is determined that the parameter correction timing is reached. In addition, the reforming adjustment mode, the selective oxidation adjustment mode, or the combustion adjustment mode can be automatically executed at a necessary time without unnecessary execution. Incidentally, as the operation progress information, an integrated operation time obtained by integrating the operation time of the fuel cell power generation device or an integrated raw fuel supply amount obtained by integrating the supply amount of raw fuel to the reforming chamber can be used.
Therefore, it is possible to stabilize the generation of the fuel gas regardless of the operating time without affecting the normal operation of the fuel cell power generation device as much as possible without requiring an artificial operation. Became.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the fuel cell power generation apparatus includes a fuel gas generation unit P that generates a fuel gas mainly composed of hydrogen gas using a hydrocarbon-based raw fuel gas as a raw material, and the fuel gas generation unit. The fuel cell G is configured to be supplied with the fuel gas generated in P and generate electric power, and the control unit C as control means for controlling operation.

  Since the fuel cell G is well known and will not be described in detail and illustrated briefly, the fuel cell G is, for example, a solid state in which a plurality of cells each having a solid polymer film as an electrolyte layer are provided in a stacked state. It is configured as a polymer type, and fuel gas is supplied from the fuel gas generation unit P to the fuel electrode of each cell, and air is supplied from the reaction blower 36 to the oxygen electrode of each cell, so that the electrochemistry of hydrogen and oxygen It is configured to generate electricity by a natural reaction.

The fuel gas generation unit P includes a desulfurization chamber 1 that desulfurizes a hydrocarbon-based raw fuel gas such as natural gas, a water vapor generation chamber 2 that generates water vapor by heating and evaporating supplied water, and a desulfurization chamber A reforming chamber 3 for reforming the raw fuel gas desulfurized in 1 with the steam generated in the steam generating chamber 2 to generate a reforming gas mainly composed of hydrogen gas, and a reforming burner Combustion fuel is combusted at 17 to heat the reforming chamber 3 so that it can be reformed, and carbon monoxide gas in the reforming gas supplied from the reforming chamber 3 is steamed. And a selective oxidation chamber 5 that selectively oxidizes the carbon monoxide gas remaining in the reforming gas supplied from the transformation chamber 4. To produce a hydrogen-containing gas with a low carbon monoxide gas content. It is form.
The reforming chamber 3 and the combustion chamber 6 are provided side by side so that heat can be transferred.

  Further, the reforming chamber heating flow chamber 7 for heating the reforming chamber 3 by passing the reforming process gas discharged from the reforming chamber 3 and the combustion chamber 6 from the reforming chamber 3. The exhaust gas flow for heating 8 that heats the steam generation chamber 2 with the flue gas, and the flue gas discharged from the exhaust gas flow chamber 8 for heating is passed through Desulfurization desulfurized in the desulfurization chamber 1 by a high-temperature reforming treatment gas discharged from a temperature-controlling exhaust gas flow chamber 9 for adjusting the temperature of the shift chamber 4 with combustion exhaust gas and the reforming chamber heating flow chamber 7 Raw heat exchanger Ea after desulfurization for heating raw raw fuel gas, and raw fuel gas subjected to desulfurization treatment in desulfurization chamber 1 by the reformed gas after heat exchange in heat exchanger Ea for raw fuel after desulfurization Heat exchanger Eb for raw fuel before desulfurization for heating the exhaust gas, and the exhaust gas flow chamber for temperature control It is provided an economizer Ec for recovering exhaust heat of the combustion exhaust gas is discharged to the combustion fuel and combustion air supplied to the reformer burner 17.

  The desulfurized raw fuel heat exchanger Ea is connected to the upstream heat exchange flow chamber 10 through which the reforming gas discharged from the reforming chamber heating flow chamber 7 flows, and the desulfurization chamber 1. The desulfurized raw fuel flow chamber 11 through which the desulfurized raw fuel gas that is desulfurized and supplied to the reforming chamber 3 flows is provided so as to be able to exchange heat, and the raw fuel heat exchange section Eb before desulfurization is provided. Includes a downstream heat exchange flow chamber 12 through which the reformed gas discharged from the upstream heat exchange flow chamber 10 flows, and a raw fuel gas to be desulfurized in the desulfurization chamber 1. The raw fuel flow passage 13 before desulfurization is provided so as to be capable of heat exchange.

  Further, the economizer Ec supplies the combustion fuel supplied to the reformer burner 17 on one side of the exhaust heat source exhaust gas flow chamber 14 through which the combustion exhaust gas discharged from the temperature control exhaust gas flow chamber 9 flows. A combustion fuel flow chamber 15 to be circulated and a combustion air flow chamber 16 to which the combustion air supplied to the reforming burner 17 is circulated are respectively connected to the exhaust heat source exhaust gas flow chamber 14. And is configured to be capable of heat exchange.

As shown in FIG. 2, the fuel gas generation unit P arranges a plurality of flat containers B forming a processing chamber S for processing a fluid in a laterally stacked manner, and arranges the plurality of containers B in a container arrangement direction. It is configured to be pressed by pressing means (not shown) from both sides of the container arrangement direction in a state in which relative movement in the orthogonal direction is allowed.
As shown in FIGS. 3 to 5, the container B includes a pair of container forming members 51 positioned in the container arranging direction by welding the peripheral portions thereof. At least one of them is formed in a dish shape in which the central portion bulges with the peripheral portion as a connection allowance.

  And, by the plurality of processing chambers S formed in the plurality of containers B, the desulfurization, steam generation, reforming, transformation, selective oxidation, combustion chambers 1, 2, 3, 4, 5, 6, and The reforming chamber heating, heating exhaust gas, cooling exhaust gas, upstream heat exchange, post-desulfurization raw fuel, downstream heat exchange, pre-desulfurization raw fuel, exhaust heat source exhaust gas, combustion fuel, combustion air Each flow chamber 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 is configured.

In this embodiment, the plurality of containers B are formed so that each of the pair of container forming members 51 is the dish-shaped container forming member 51, and is partitioned between the pair of container forming members 51. The peripheral portion is welded and connected with the member 52 positioned, and the processing chamber S is provided on both sides of the partition member 52.
Then, one dish-shaped auxiliary container forming member 53 for positioning a part of the plurality of containers B on the back part of the dish-shaped container forming member 51 in a stacked state is the back part of the peripheral part adjacent thereto. Are formed into a multi-treatment chamber type container Bm in which a plurality of treatment chambers S are formed in the container arrangement direction. This multi-processing chamber type container Bm is shown in FIGS. 4 and 5. The remaining part of the plurality of containers B is a basic container Bs without the auxiliary container forming member 53. This basic type container Bs is shown in FIG.

  The dish-shaped container forming member 51, the partition member 52, and the dish-shaped auxiliary container forming member 53 are each made of a heat-resistant metal such as stainless steel, and the dish-shaped container forming member 51 and the dish-shaped auxiliary container forming member 53 is formed by press-molding a plate made of the heat-resistant metal into a dish shape.

  In this embodiment, seven containers B are arranged to constitute the hydrogen-containing gas generation device P. In addition, in order to clarify the distinction of the seven containers B, for the sake of convenience, reference numerals 1, 2, 3... 7 indicating the arrangement order from the left in FIG. .

  In this embodiment, the second container B2, the fourth container B4, and the rightmost container B7 from the left are the basic containers Bs.

  The leftmost container B1 is provided with the auxiliary container forming member 53 on the back of the left dish-shaped container forming member 51 of the pair of dish-shaped container forming members 51, and the three processing chambers S are disposed in the container. As shown in FIG. 4, the third container B3 from the left is a multi-processing chamber type container Bm provided in a lined-up state, and the right side dish of the pair of dish-shaped container forming members 51 is also shown in FIG. The auxiliary container forming member 53 is provided on the back portion of the container-shaped container forming member 51 to form a multi-processing chamber type container Bm having three processing chambers S arranged in the container arranging direction, and the fifth container from the left. In the container B5, as shown in FIG. 5, the auxiliary container forming member 53 is provided on both back portions of the pair of dish-shaped container forming members 51, and the four processing chambers S are arranged in the container arranging direction. And the sixth container B6 from the left is the fifth container from the left. Similar to 5, there as a multi processing chamber type container Bm having a state arranged four processing chamber S in the container arrangement direction.

  As shown in FIG. 2, in the leftmost container B1 (multi-processing chamber type container Bm having three processing chambers S), the combustion fuel flow chamber 15 is configured in the leftmost processing chamber S, and the center The exhaust heat source exhaust gas flow chamber 14 is configured in the processing chamber S, the combustion air flow chamber 16 is configured in the rightmost processing chamber S, and the economizer Ec is configured in the leftmost container B1. It is.

  The exhaust gas flow chamber 8 for heating is configured in the left processing chamber S in the second container B2 from the left (basic-type container Bs having two processing chambers S in the container arrangement direction). The steam generation chamber 2 is configured in the processing chamber S.

  As shown in FIG. 4, in the third container B3 from the left (multi-processing chamber type container Bm having three processing chambers S in the container arrangement direction), the combustion chamber is disposed in the processing chamber S at the left end. 6, the reforming chamber 3 is configured by the central processing chamber S, and the reforming chamber heating flow chamber 7 is configured by the rightmost processing chamber S.

  That is, ruthenium, nickel, platinum, etc. for reforming the hydrocarbon-based raw fuel gas into a gas mainly composed of hydrogen gas using water vapor in the central processing chamber S of the third container B3 from the left The reforming catalyst 19 is filled, and the processing chamber S is formed in the reforming chamber 3.

The reforming chamber 3 is configured such that the raw fuel gas and water vapor are supplied from the upper end in a mixed state and flow downward, and the reforming chamber 3 and the reforming chamber 3 are configured to flow. A fluid passage 54 is provided at the lower end of the dish-like container forming member 51 that separates the processing chamber S that constitutes the flow chamber 7 for heating the quality chamber, and communicates with the processing chambers S adjacent in the container arrangement direction. The reforming process gas that has been reformed in the reforming chamber 3 is caused to flow into the reforming chamber heating flow chamber 7 through the fluid passage portion 54.
A reforming temperature sensor Tr as a reforming chamber temperature detecting means is provided so as to detect the temperature of the reforming reaction catalyst 19 at the lower end portion of the reforming chamber 3.

  Incidentally, in the reforming chamber 3, when the raw fuel gas is a natural gas-based city gas (13A) containing methane gas as a main component, for example, 600 to 750 ° C. due to the catalytic action of the reforming reaction catalyst 19. Under the reforming treatment temperature in the range, methane gas and water vapor are reformed by the following reaction formula (1) to produce a reforming treatment gas mainly composed of hydrogen gas.

Further, the reforming burner is burned in the combustion chamber 6 at the lower end portion in the combustion chamber 6 constituted by the leftmost processing chamber S of the third container B3 from the left. 17 is provided.
As shown in FIG. 4, the reforming burner 17 includes a first jet pipe 17 </ b> A having a plurality of first jet holes 17 a arranged in a row in the longitudinal direction and a plurality of second jet holes 17 b arranged in a longitudinal direction. A second ejection pipe 17B provided in a shape is arranged side by side so that the ejection direction of the first ejection hole 17a and the ejection direction of the second ejection hole 17b intersect.
Further, a combustion catalyst holding body 18 holding a combustion catalyst made of platinum, palladium or the like is disposed above the reforming burner 17 in the combustion chamber 6.
And the combustion temperature sensor Tf as a combustion chamber temperature detection means is provided so that the temperature in the combustion chamber 6 may be detected.

At the start-up time when the reforming burner 17 is ignited and the reforming chamber 3 is heated to a temperature capable of reforming, the same raw fuel gas as that supplied to the reforming chamber 3 is used as combustion fuel for combustion air. In a normal state where the off-gas as exhaust fuel gas discharged from the fuel electrode of the fuel cell G is burned as combustion fuel, the first jet pipe 17A is supplied and combusted in a mixed state. The off-gas is supplied to the second jet pipe 17B and the combustion air is supplied to the first jet pipe 17A.
In addition, in order to heat the reforming chamber 3 so that the reforming process can be performed, when the off gas alone is insufficient, the raw fuel gas is mixed with the combustion air as the combustion fuel so as to compensate for the shortage. In this state, it is configured to be additionally supplied to the first ejection pipe 17A.

  The upstream side heat exchange flow chamber 10 is configured in the left processing chamber S of the fourth container B4 (basic type container Bs) from the left, and the desulfurized raw fuel is passed in the right processing chamber S. The flow chamber 11 is constituted, and the fourth vessel B4 from the left constitutes the heat exchanger Ea for raw fuel after desulfurization.

As shown also in FIG. 5, in the fifth container B5 from the left (multi-processing chamber type container Bm having four processing chambers S in the container arrangement direction), the second processing chamber from the left end and the left. Each of S is filled with a desulfurization reaction catalyst 20 for desulfurizing a hydrocarbon-based raw fuel gas to constitute a desulfurization chamber 1, and the third treatment chamber S from the left is a raw fuel flow chamber 13 before desulfurization. The rightmost processing chamber S is configured in the shift chamber 4 by filling it with an iron oxide-based or copper-zinc-based shift reaction catalyst 21 that converts carbon monoxide gas into carbon dioxide gas using water vapor. It is.
Incidentally, although details will be described later, since the transformation chamber 4 constituted by the fifth container B5 from the left is the first stage and the transformation chamber 4 is provided in four stages, the fifth container from the left will be described below. The conversion chamber 4 configured in B5 may be referred to as the first-stage conversion chamber 4.

  Further, the dish-shaped container forming member 51 that partitions the leftmost processing chamber S and the second processing chamber S from the left, the second processing chamber S from the left and the third processing chamber S from the left. Each of the partition members 52 is provided with a fluid passage portion 54 that communicates with the processing chambers S on both sides. Then, the desulfurization chamber 1 configured by the second processing chamber S from the left is the first stage, the desulfurization chamber 1 configured by the leftmost processing chamber S is the second stage, and the raw fuel gas to be desulfurized is After passing through the raw fuel flow chamber 13 before desulfurization and preheating, each desulfurization chamber 1 is flowed in the order of the first stage and the second stage to perform desulfurization treatment.

In addition, a plate-shaped container forming member 51 that partitions the third processing chamber S from the left that constitutes the raw fuel flow chamber 13 before desulfurization and the rightmost processing chamber S that constitutes the first-stage transformation chamber 4 is transmitted. As the heat walls, the raw fuel gas to be desulfurized flowing through the raw fuel flow chamber 13 before desulfurization and the reformed gas to be converted to flow through the first-stage shift chamber 4 are heated through the heat transfer wall. It is configured to be exchanged.
That is, the first-stage transformation chamber 4 is configured to be used as the downstream heat exchange flow chamber 12, and the raw fuel flow chamber 13 before desulfurization and the downstream heat exchange flow chamber 12 The heat exchanger Eb for raw fuel before desulfurization is configured.

  In the sixth container B6 from the left (multi-processing chamber type container Bm having four processing chambers S in the container arrangement direction), the leftmost processing chamber S is configured as the temperature control exhaust gas flow chamber 9; Each of the second chamber from the left, the third chamber from the left, and the rightmost processing chamber S is configured in the shift chamber 4 by being charged with the shift reaction catalyst 21.

  Further, a partition member 52 that partitions the second processing chamber S from the left and the third processing chamber S from the left, and a dish-like container that partitions the third processing chamber S from the left and the rightmost processing chamber S are formed. Each member 51 is provided with a fluid passage portion 54 communicating with the processing chambers S on both sides. The transformation chamber 4 constituted by the second processing chamber S from the left is the second stage, the transformation chamber 4 constituted by the third processing chamber S from the left is the third stage, and the rightmost processing chamber. The transformation chamber 4 constituted by S is assumed to be the fourth stage, and an external gas processing flow path from the first transformation chamber 4 constituted by the fifth container B5 from the left to the second transformation chamber 4 is provided. The reforming process gas is supplied at 32, and the reforming process gas is passed through the shift chambers 4 in the order of the second, third, and fourth stages to perform the shift process.

  Incidentally, in the shift chamber 4, carbon monoxide and water vapor in the reformed gas supplied from the reforming chamber 3 are, for example, in the range of 150 to 400 ° C. by the catalytic action of the shift reaction catalyst 21. Under the modification treatment temperature, the modification reaction is performed according to the following reaction formula (2).

  In the seventh container from the left, that is, the rightmost container B7 (basic container Bs), the left processing chamber S is used for heat transfer adjustment without using anything, and the right processing chamber S contains carbon monoxide gas. The selective oxidation chamber 5 is configured by filling a selective oxidation catalyst 22 made of a noble metal such as platinum, ruthenium, or rhodium that is selectively oxidized.

  The selective oxidation chamber 5 is supplied from the lower end portion in a mixed state with the reforming process gas transformed in the shift chamber 4 and the selective oxidation air, flows upward, and is discharged from the upper end portion. The lower end selective oxidation temperature sensor Tb as the selective oxidation chamber temperature detecting means is provided so as to detect the temperature of the selective oxidation catalyst 22 at the lower end portion in the selective oxidation chamber 5. A central selective oxidation temperature sensor Tm is provided so as to detect the temperature of the central selective oxidation catalyst 22.

  Incidentally, in the selective oxidation chamber 5, the catalytic action of the selective oxidation reaction catalyst 22, for example, remains in the reformed treatment gas after the shift treatment at a selective oxidation treatment temperature of 80 to 150 ° C. Carbon oxide gas is selectively oxidized.

  When the processing chamber S of the container B is filled with a catalyst such as the reforming reaction catalyst 19 or the like, it is slightly above the bottom of the processing chamber S in a posture in which the flat container B is vertically aligned. In order to receive the catalyst at the section, the porous catalyst receiving plate 55 is attached by welding to the dish-shaped container forming member 51, the partition member 52 or the dish-shaped auxiliary container forming member 53 forming the processing chamber S. is there.

  Then, in the posture in which the above-described seven flat containers B are arranged in the vertical direction, the left side of the left end container B1 and the left end container B1 and the second container B2 from the left, Between the second container B2 and the third container B3 from the left, between the third container B3 from the left and the fourth container B4 from the left, and the fourth container B4 from the left In a state where the heat transfer amount adjusting heat insulating material 23 is arranged between the fifth container B5 from the left and between the fifth container B5 from the left and the sixth container B6 from the left. Arranged in close contact, and configured to press the seven containers B in close contact from both sides in the container alignment direction in a state allowing relative movement in a direction orthogonal to the container alignment direction, The side of the rightmost container B7 constituting the selective oxidation chamber 5 is ventilated toward the container B7. Sea urchin and the cooling fan 26 is provided, the by cooling fan 26, is arranged to cool the selective oxidation chamber 5.

That is, among the desulfurization chamber 1, the reforming chamber 3, the shift chamber 4, and the selective oxidation chamber 5, the reforming chamber 3 needs to be maintained at the highest temperature, and the selective oxidation chamber 5 needs to be maintained at the lowest temperature.
Therefore, the reforming chamber 3 and the combustion chamber 6 that heats the reforming chamber 3 are provided in close contact with each other so that heat can be transferred. The chamber 4 and the selective oxidation chamber 5 are arranged side by side from the reforming chamber 3 in the order described, and are provided in a state where heat can be transferred from the reforming chamber 3 and the combustion chamber 6, and the reforming chamber 3 and the combustion chamber 6 are in close contact with each other. The steam generation chamber 2 is provided on the combustion chamber 6 side in such a state that heat can be transferred from the reforming chamber 3 and the combustion chamber 6.

  And between adjacent ones, that is, between the reforming chamber 3 and the desulfurization chamber 1, between the desulfurization chamber 1 and the shift chamber 4, between the shift chamber 4 and the selective oxidation chamber 5, and the combustion chamber. The heat transfer state (heat transfer amount) between the steam generator 6 and the steam generation chamber 2 is set to a predetermined value, and the combustion amount of the reforming burner 17 is adjusted so as to maintain the reforming chamber 3 at the reforming temperature. In addition, by adjusting the flow rate of the cooling fan 26 so as to maintain the selective oxidation chamber 5 at the selective oxidation treatment temperature, the desulfurization chamber 1 and the shift chamber located between the reforming chamber 3 and the selective oxidation chamber 5 are controlled. The chamber 4 can be maintained at the desulfurization treatment temperature and the shift treatment temperature without any control of the temperature, and the steam generation chamber 2 can be maintained at an appropriate temperature for steam generation according to the circumstances. It is configured so that it can.

  Hereinafter, based on FIG. 1 and FIG. 2, a flow path for each processing chamber S for supplying a fluid to each processing chamber S formed in each container B and discharging a fluid from each processing chamber S will be described. A connection form will be described. In each processing chamber S, the fluid is supplied from the upper part and flows downward and discharged from the lower part, or the fluid is supplied from the lower part and flows upward and supplied from the upper part. Since the fluid is configured to flow in the vertical direction so as to be discharged, each flow path is connected to the upper end portion or the lower end portion of each processing chamber S.

  A raw fuel supply passage 31 for power generation is connected to the raw fuel flow chamber 13 before desulfurization, and the second stage desulfurization chamber 1 and the raw fuel flow chamber 11 after desulfurization are connected to the raw fuel flow chamber 11 after desulfurization. The reforming chamber 3, the reforming chamber heating flow chamber 7 and the upstream heat exchange flow chamber 10, and the upstream heat exchange flow chamber 10 and the downstream heat exchange. The first-stage conversion chamber 4 that also serves as the flow-through chamber 12, the first-stage conversion chamber 4 and the second-stage conversion chamber 4, and the fourth-stage conversion chamber 4 and the selective oxidation And the selective oxidation chamber 5 and the fuel gas supply part of the fuel cell G are connected by a fuel gas flow path 33 so that the raw fuel flow before desulfurization is connected. Chamber 13, first-stage desulfurization chamber 1, post-desulfurization raw fuel flow chamber 11, reforming chamber 3, reforming chamber heating flow chamber 7, upstream heat exchange flow chamber 10, 1 2nd stage , 3-stage, 4-stage shift chamber 4, flows through the selective oxidation chamber 5 in order, it is formed a gas processing route to the fuel cell G.

The power generation raw fuel supply path 31 is supplied with a reforming raw fuel pump 27 that pumps the raw fuel gas for reforming treatment through the power generation raw fuel supply path 31, and the reforming raw fuel pump 27. A reforming raw fuel flow rate sensor Q for detecting the flow rate of the raw fuel gas supplied is provided.
The supply amount of the raw fuel gas for the reforming process is adjusted by adjusting the rotation speed of the reforming raw fuel pump 27.

  Further, the selective oxidation air is supplied from the selective oxidation blower 24 as the selective oxidation blower means to the gas processing flow path 32 connecting the fourth stage conversion chamber 4 and the selective oxidation chamber 5. An oxidizing air supply path 25 is connected, and the selective oxidizing air is mixed with the reforming gas that has been subjected to the transformation treatment in the transformation chamber 4 and supplied to the selective oxidation chamber 5.

  That is, the raw fuel gas is desulfurized in the first-stage and second-stage desulfurization chambers 1, and the steam supplied from the steam generation chamber 2, which will be described later, is supplied to the desulfurized raw fuel gas through the steam flow path 34. The raw fuel gas mixed with the steam is reformed in the reforming chamber 3, and the reformed gas is transferred to the first, second, third, and fourth shift chambers 4. Then, the reformed reformed gas is selectively oxidized in the selective oxidation chamber 5 to generate a hydrogen-containing gas having a low carbon monoxide content, and the fuel gas using the hydrogen-containing gas as a fuel gas. The fuel cell G is supplied through the flow path 33.

  The combustion chamber 6 and the heating exhaust gas flow chamber 8, the heating exhaust gas flow chamber 8 and the temperature control exhaust gas flow chamber 9, the temperature control exhaust gas flow chamber 9 and the economizer Ec The exhaust heat source exhaust gas flow chamber 14 is connected to each other by a combustion exhaust gas flow path 37, and the combustion exhaust gas discharged from the combustion chamber 6 is converted into a heating exhaust gas flow chamber 8, a temperature control exhaust gas flow chamber 9, and an economizer. Ec exhaust heat source exhaust gas flow chamber 14 is configured to flow in the order.

  In an off gas passage 38 for leading off gas discharged from the fuel electrode of the fuel cell G as combustion fuel to be burned by the reforming burner 17, an off gas discharge portion of the fuel cell G and a combustion gas of the economizer Ec The flow chamber 15 is connected to the combustion gas flow chamber 15 and the second jet pipe 17B of the reforming burner 17, respectively.

  Also, a combustion blower 39 serving as a combustion blower for supplying combustion air to the reforming burner 17 and the combustion air flow chamber 16 of the economizer Ec are connected to the combustion air flow chamber 16 and the combustion air flow chamber 16. The first jet pipe 17 </ b> A of the reforming burner 17 is connected by a combustion air flow path 40.

  Then, in the economizer Ec, the exhaust heat of the combustion exhaust gas is recovered to off gas and combustion air, the off gas and combustion air are preheated, and the preheated off gas and combustion air are converted into the reforming burner 17. It is comprised so that it may supply and burn to.

Further, a burner raw fuel supply passage 41 for supplying raw fuel gas as combustion fuel is connected to the first jet pipe 17A of the reforming burner 17.
The burner raw fuel supply passage 41 is provided with a burner raw fuel control valve V2 for adjusting the amount of raw fuel gas supplied through the burner raw fuel supply passage 41.

  The burner raw fuel supply passage 41 and the combustion air flow passage 40 are connected to the first jet pipe 17A in a state of being joined before the first jet pipe 17A, and the raw fuel gas Is supplied to the first jet pipe 17A in a state premixed with combustion air.

  A reforming water supply passage 43 for supplying reforming water for generating steam for reforming treatment by the reforming water pump 42 is connected to the steam generating chamber 2, and the heating exhaust gas flow chamber 8 is used. The steam flow path 34 that guides the steam generated in the steam generation chamber 2 by heating is connected to a gas processing flow path 32 that connects the second-stage desulfurization chamber 1 and the raw fuel flow chamber 11 after desulfurization. Thus, the raw fuel gas desulfurized in the desulfurization chamber 1 is mixed with water vapor.

  That is, the processing chamber S adjacent to the reforming chamber 3 is configured as a combustion chamber 6 that combusts combustion fuel to heat the reforming chamber 3, and one of the two processing chambers S adjacent to each other is formed. An exhaust gas flow chamber for heating, in which the supplied water is vaporized by heating to form the steam generation chamber 2, and the other exhaust gas exhausted from the combustion chamber 6 is passed through to heat the steam generation chamber 2. The steam generated in the steam generation chamber 2 is supplied to the reforming chamber 3 for reforming reaction.

By comprising as mentioned above, the fuel gas production | generation part P which produces | generates hydrogen containing gas with little carbon monoxide gas content using hydrocarbon raw material fuel and water vapor | steam is made into the water vapor | steam for the reforming process of raw fuel It is comprised integrally in the state provided also with the water vapor | steam production | generation part which produces | generates.
Although it is necessary to heat each of the reforming chamber 3 and the steam generation chamber 2, the water is evaporated at a temperature lower than the temperature at which the raw fuel and the steam undergo the reforming reaction, and the combustion chamber 6 is Provided adjacent to the reforming chamber 3, the reforming chamber 3 is heated to a high temperature in the combustion chamber 6, and the combustion exhaust gas discharged from the combustion chamber 6 is flowed through the heating exhaust gas adjacent to the steam generation chamber 2. The steam generation chamber 2 is heated by flowing through the chamber 8.
That is, since the single combustion chamber 6 heats both the reforming chamber 3 and the steam generation chamber 2 to suitable temperatures, the cost of the apparatus can be reduced and the energy consumption can be reduced.

Next, the control operation of the control unit C will be described.
As shown in the flowchart of FIG. 6, at the start timing (step # 1), the control unit C executes the start-up operation mode in which the reforming burner 17 is ignited and the reforming chamber 3 is heated to the set temperature for reforming. (Step # 2) When the start-up operation mode ends, the reforming raw fuel gas is supplied to the fuel gas generation part P to generate the fuel gas, and the generated fuel gas is supplied to the fuel cell G. A parameter for correcting a parameter for controlling the operation of the fuel gas generator P when the normal operation mode for generating power is executed (step # 3) and the parameter correction timing is reached during the execution of the normal operation mode (step # 4). When corrective operation is executed (step # 5) and the stop timing is reached (step # 6), a predetermined stop process is executed (step # 7), and the fuel gas generator P and the fuel cell G To stop the operation.

For example, when the fuel cell power generator is operated during a predetermined operation time of the day, the start timing is reached at the start time of the operation time zone, and the stop timing is reached at the end time of the operation time zone. .
Incidentally, the reforming set temperature corresponds to a set appropriate temperature, and is set to a predetermined temperature within a range of 600 to 750 ° C., for example.

  Further, when the integrated operation time obtained by integrating the operation time of the fuel cell power generation device reaches a set time (for example, set every 300 hours), the parameter correction timing is set.

  In the start-up operation mode, the rotational speed of the combustion blower 39 is adjusted so that the combustion air supply amount becomes the start setting air supply amount, the igniter (not shown) is operated, and the raw fuel for the burner Adjust the opening of the burner raw fuel control valve V2 so that the gas supply amount becomes the set fuel supply amount for starting, and turn off the igniter when ignition of the reforming burner 17 is detected by a frame rod (not shown). Thereafter, when the temperature of the reforming reaction catalyst 19 reaches the reforming set temperature (for example, 700 ° C.) based on the detection information of the reforming temperature sensor Tr, the start-up operation mode is terminated.

The normal operation mode will be further described.
In this normal operation mode, a main output is executed in which a target output that follows the currently requested power load is set and the output of the fuel cell G is adjusted to the target output (output current value).

  As shown in FIG. 8, the relationship between the target output of the fuel cell G and the target raw fuel gas flow rate for reforming that is required to output the target output by the fuel cell G in advance is expressed as follows. As the gas flow rate information, the target raw fuel gas flow rate increases as the target output increases.

As shown in FIG. 9, the target combustion chamber temperature of the combustion chamber 6 for heating the reforming reaction catalyst 19 to the reforming preset temperature is set in advance according to the target output of the fuel cell G. The target combustion chamber temperature is set to be higher as the value of becomes higher. The relationship between the target output of the fuel cell G and the target combustion chamber temperature of the combustion chamber 6 is output vs. combustion chamber temperature information that defines the combustion chamber temperature of the combustion chamber 6 in accordance with the magnitude of the target output of the fuel cell G. is there.
That is, when the target output of the fuel cell G increases, the reforming amount of the raw fuel gas in the reforming chamber 4 increases. The amount of combustion fuel supplied to the quality burner 17 is increased to raise the temperature of the combustion chamber 6, and the output versus combustion chamber temperature information is set as described above.

  As shown in FIG. 10, the reforming water is supplied so that a predetermined S / C (ratio of the steam supply amount to the raw fuel gas supply amount to the reforming chamber 3) is obtained with respect to the reforming raw fuel gas flow rate. The target rotational speed of the reforming water pump 42 to be supplied is set according to the target output of the fuel cell G in a state where the target rotational speed increases as the target output increases. Hereinafter, the relationship between the target output of the fuel cell G and the target rotational speed of the reforming water pump 42 may be described as output versus reforming water pump rotational speed information. Incidentally, S / C is set to the range of 2.5-3.0, for example.

As shown in FIG. 11, the target rotational speed of the combustion blower 39 for supplying combustion air in an amount corresponding to the amount of combustion fuel supplied to the reforming burner 17 is set to be used for combustion to the reforming burner 17. The target rotational speed is set so as to increase as the amount of fuel supplied increases in accordance with the amount of fuel supplied. The relationship between the supply amount of the combustion fuel to the reforming burner 17 and the target rotation speed of the combustion blower 39 is the target rotation speed of the combustion blower 39 corresponding to the supply amount of the combustion fuel to the reforming burner 17. Is output versus rotational speed information (hereinafter referred to as output versus combustion blower rotational speed information).
That is, when the target output of the fuel cell G increases, the amount of combustion fuel supplied to the reforming burner 17 for maintaining the temperature of the combustion chamber 6 at the target combustion chamber temperature corresponding to the target output of the fuel cell G increases. Accordingly, it is necessary to increase the amount of combustion air supplied to the reforming burner 17, and as described above, the output-combustion blower rotational speed information is set.

  When the reforming burner 17 is combusted in the combustion chamber 6, combustion is performed so that the temperature of the combustion chamber 6 is as high as possible, so that the combustion is stabilized and the reforming chamber 3 is set to the set temperature for reforming. It is preferable when heating appropriately. Therefore, the combustion air supplied to the reforming burner 17 has a combustion air ratio such that the combustion burner 6 burns the reforming burner 17 so that the combustion chamber 6 can be heated to increase its temperature as much as possible. The supply amount is determined, and the output-combustion blower rotation speed information is determined based on the supply amount of the combustion air.

As shown in FIG. 12, the target of the selective oxidation blower 24 for supplying an appropriate amount of selective oxidation air to selectively oxidize carbon monoxide in the reforming process gas supplied to the selective oxidation chamber 5. The rotation speed is set according to the target output of the fuel cell G in a state where the target rotation speed increases as the target output increases. Hereinafter, the relationship between the target output of the fuel cell G and the target rotational speed of the selective oxidation blower 24 will be described as output versus selective oxidation blower rotational speed information.
That is, when the target output of the fuel cell G increases, the amount of the reforming process gas to be selectively oxidized in the selective oxidation chamber 5 increases, so the flow rate of the selective oxidizing air supplied to the selective oxidation chamber 5 increases. That is, it is necessary to increase the rotational speed of the selective oxidation blower 24, and the output versus selective oxidation blower rotational speed information is set as described above.

Since the relationship between the rotational speed of the selective oxidation blower 24 and the amount of blown air is determined in advance, the flow rate of the selective oxidation air that selectively oxidizes carbon monoxide in the reformed gas supplied to the selective oxidation chamber 5. Can be substituted by the rotational speed of the selective oxidation fan 24.
Therefore, the output versus selective oxidation blower rotational speed information set as described above is obtained by setting the target flow rate of the selective oxidation air corresponding to the size of the target output of the fuel cell G to the predetermined output versus selective oxidation flow rate information. It is equivalent.

  In the normal operation mode, the control unit C sets a target output that follows the currently requested power load, and based on the output versus raw fuel gas flow rate information, The fuel gas flow rate is obtained, and the rotational speed of the reforming raw fuel pump 27 is adjusted so that the flow rate detected by the reforming raw fuel flow rate sensor Q becomes the obtained target raw fuel gas flow rate. Based on the reforming water pump rotational speed information, a target rotational speed corresponding to the set target output is obtained, and the reforming water pump 42 is controlled to obtain the obtained target rotational speed, and the output versus combustion chamber temperature information is obtained. Based on the target combustion chamber temperature corresponding to the set target output, the raw fuel control valve V2 for the burner 17 supplies the raw fuel to the reforming burner 17 so that the detected temperature of the combustion temperature sensor Tf becomes the calculated target combustion chamber temperature. Fuel gas supply volume Adjusting (that is, adjusting the supply amount of combustion fuel), and obtaining a target rotational speed corresponding to the supply amount of combustion fuel to the reforming burner 17 based on the output versus combustion blower rotational speed information, The combustion blower 39 is controlled so that the obtained target rotational speed is obtained, a target rotational speed corresponding to the set target output is obtained based on the output versus selective oxidation blower rotational speed information, and the obtained target rotational speed is obtained. And the rotation of the cooling fan 26 so that the temperature detected by the central selective oxidation temperature sensor Tm becomes the set temperature for selective oxidation (for example, 80 to 150 ° C.). Adjust the speed.

The control of the rotational speed of the combustion blower 39 based on the output versus combustion blower rotational speed information will be described.
The fuel utilization rate in the fuel cell G is set in advance. Based on the target output and the control information of the burner raw fuel control valve V2, the fuel utilization rate is set for the combustion combining the off gas supplied to the reforming burner 17 and the raw fuel gas. The amount of fuel can be determined.
Therefore, the control unit C obtains the supply amount of the combustion fuel to the reforming burner 17 for the current target output (a total amount of the off gas and the raw fuel gas) and outputs the output versus combustion blower rotational speed information. Based on the above, the target rotational speed of the combustion blower 39 corresponding to the obtained supply amount of the combustion fuel is obtained, and the rotational speed of the combustion blower 39 is adjusted to be the obtained target rotational speed.

Next, the parameter correction operation will be described.
The controller C is configured to be switchable between a combustion adjustment mode, a reforming adjustment mode, and a selective oxidation adjustment mode.
In the combustion adjustment mode, the control unit C adjusts and maintains the supply amount of the raw fuel gas to the reforming chamber 3 so that the power generation output of the fuel cell G becomes the target output for parameter correction, and The amount of fuel supplied to the reforming burner 17 was adjusted so that the temperature of the combustion chamber 6 became the target combustion chamber temperature obtained based on the output versus combustion chamber temperature information and the target output for parameter correction. The rotational speed of the combustion blower 39 is maintained in order to obtain the rotational speed of the combustion blower 39 for making the temperature of the combustion chamber 6 maximum or substantially maximum based on the detection information of the combustion temperature sensor Tf. And adjusting the output-combustion blower rotation speed information based on the calculated rotation speed of the combustion blower 39.

The combustion adjustment mode will be further described.
In this combustion adjustment mode, a target raw fuel gas flow rate corresponding to a target output for parameter correction is obtained based on the output versus raw fuel gas flow rate information and detected by the reforming raw fuel flow rate sensor Q. The rotational speed of the reforming raw fuel pump 27 is adjusted and maintained so that the flow rate becomes the determined target raw fuel gas flow rate, and the target output for parameter correction is set based on the output versus the water pump rotational speed information for reforming. A corresponding target rotational speed is obtained, and the reforming water pump 42 is controlled and maintained so as to obtain the obtained target rotational speed, and the parameter correction target output is obtained based on the output versus combustion chamber temperature information. The target combustion chamber temperature is obtained, and the amount of raw fuel gas supplied to the reforming burner 17 is adjusted by the burner raw fuel control valve V2 so that the detected temperature of the combustion temperature sensor Tf becomes the calculated target combustion chamber temperature. Maintain The target rotational speed corresponding to the target output for parameter correction is obtained based on the output versus selective oxidation blower rotational speed information, and the selective oxidation blower 24 is controlled and maintained to be the obtained target rotational speed. In addition, the rotational speed of the combustion blower 39 is changed and adjusted in a state where the rotational speed of the cooling blower 26 is adjusted so that the detected temperature of the central selective oxidation temperature sensor Tm becomes the set temperature for selective oxidation. The supply amount of combustion air to the reforming burner 17 is changed and adjusted.
The rotation of the combustion blower 39 that maximizes the temperature of the combustion chamber 6 based on the detection information of the combustion temperature sensor Tf during the change and adjustment of the supply amount of the combustion air to the reforming burner 17 as described above. Find the speed.

  In short, the amount of raw fuel gas supplied to the reforming chamber 3, the amount of reforming water supplied to the steam generation chamber 2, and the amount of selective oxidizing air supplied to the selective oxidation chamber 5 are used for parameter correction. The amount of combustion fuel supplied to the reformer burner 17 is maintained at an amount corresponding to the target output of the combustion chamber, and the detected temperature of the combustion temperature sensor Tf becomes the target combustion chamber temperature corresponding to the target output for parameter correction. In this state, the temperature of the combustion chamber 3 is changed by changing and adjusting the rotational speed of the combustion blower 39 so as to change and adjust the supply amount of the combustion air to the reforming burner 17. Thus, the rotational speed of the combustion blower 39 at which the temperature of the combustion chamber 3 is highest is obtained.

  For example, as shown by a broken line in FIG. 13, when the temperature of the combustion chamber 3 fluctuates by changing and adjusting the rotational speed of the combustion blower 39, the combustion blower 39 that reaches a peak temperature in the combustion chamber 3. Is calculated. Incidentally, in FIG. 13, the solid line represents the relationship between the rotational speed of the combustion blower 39 and the temperature of the combustion chamber 3 when the output versus combustion blower rotational speed information is set, and the temperature of the combustion chamber 3 peaks. The rotational speed of the combustion blower 39 fluctuates.

  Then, the target rotational speed of the combustion blower 39 corresponding to the amount of fuel supplied to the reforming burner 17 when the combustion adjustment mode is executed as described above is the rotation of the combustion blower 39 obtained. As shown in FIG. 11, the output-combustion blower rotational speed information indicated by the solid line is corrected so as to be the speed, as indicated by the broken line.

  Further, the control unit C adjusts and maintains the supply amount of the raw fuel gas to the reforming chamber 3 so that the power generation output of the fuel cell G becomes the target output for parameter correction in the reforming adjustment mode. In addition, based on the detection information of the reforming temperature sensor Tr and the detection information of the combustion temperature sensor Tf, the temperature of the combustion chamber 6 for setting the temperature of the reforming chamber 3 to the set temperature for reforming should be obtained. Then, the supply amount of the combustion fuel to the reforming burner 17 is changed and adjusted, and the output versus combustion chamber temperature information is corrected based on the obtained temperature of the combustion chamber 6.

This reforming adjustment mode will be further described.
In this reforming adjustment mode, a target raw fuel gas flow rate corresponding to a target output for parameter correction is obtained based on the output versus raw fuel gas flow rate information and detected by the reforming raw fuel flow rate sensor Q. The rotational speed of the reforming raw fuel pump 27 is adjusted and maintained so that the flow rate to be obtained becomes the determined target raw fuel gas flow rate, and the target output for parameter correction is based on the output versus the water pump rotational speed information for reforming A target rotational speed corresponding to the engine speed is obtained, and the reforming water pump 42 is controlled and maintained so as to obtain the obtained target rotational speed, and a parameter correction target is set based on the output versus selective oxidation fan rotational speed information. A target rotational speed corresponding to the output is obtained, and the selective oxidation blower 24 is controlled and maintained so as to obtain the obtained target rotational speed, and the temperature detected by the central selective oxidation temperature sensor Tm is used for selective oxidation. Controlling the operation of the burner raw fuel control valve V2 to change and adjust the amount of combustion fuel supplied to the reforming burner 17 while adjusting the rotational speed of the cooling blower 26 so as to reach a constant temperature; In addition, based on the output versus combustion blower rotational speed information, a target rotational speed corresponding to the current amount of combustion fuel supplied to the reforming burner 17 is obtained, and combustion is performed so that the obtained target rotational speed is achieved. The blower 39 is controlled.
Then, based on the detection information of the reforming temperature sensor Tr and the detection information of the combustion temperature sensor Tf while changing and adjusting the supply amount of the fuel for combustion to the reforming burner 17 as described above, The temperature of the combustion chamber 6 for setting the temperature (specifically, the temperature of the reforming reaction catalyst 19) to the reforming set temperature is obtained.

  In short, the amount of raw fuel gas supplied to the reforming chamber 3, the amount of reforming water supplied to the steam generation chamber 2, and the amount of selective oxidizing air supplied to the selective oxidation chamber 5 are used for parameter correction. The amount of combustion fuel supplied to the reforming burner 17 is changed and adjusted while maintaining the amount corresponding to the target output of the engine, and the rotational speed of the combustion blower 39 is obtained from the output versus combustion blower rotational speed information. By adjusting the rotation speed according to the amount of fuel supplied to the reforming burner 17, the temperature of the combustion chamber 3 is varied to bring the temperature of the reforming chamber 3 to the set temperature for reforming. The temperature of the combustion chamber 6 is obtained.

  Then, as shown in FIG. 9, the output versus combustion chamber temperature information indicated by a solid line is indicated by a broken line so that the target combustion chamber temperature corresponding to the target output for parameter correction becomes the obtained temperature of the combustion chamber 6. It is corrected as follows.

  Further, the control unit C adjusts and maintains the supply amount of the raw fuel gas to the reforming chamber 3 so that the power generation output of the fuel cell G becomes a target output for parameter correction in the selective oxidation adjustment mode. In addition, based on the detection information of the lower end selective oxidation temperature sensor Tb, the flow of the selective oxidation blower 24 is used to obtain the flow rate of the selective oxidation air for setting the temperature of the selective oxidation chamber 5 to the selective oxidation set temperature. The rotational speed information is changed and adjusted, and the output-to-selective oxidation blower rotational speed information as the output-to-selective oxidation air flow rate information is corrected based on the determined selective oxidation air flow rate.

This selective oxidation adjustment mode will be further described.
In this selective oxidation adjustment mode, a target raw fuel flow rate corresponding to a target output for parameter correction is obtained based on the output versus raw fuel gas flow rate information and detected by the reforming raw fuel flow rate sensor Q. The rotational speed of the reforming raw fuel pump 27 is adjusted and maintained so that the flow rate becomes the obtained target raw fuel gas flow rate, and the target output for parameter correction is set based on the output versus the water pump rotational speed information for reforming. A corresponding target rotational speed is obtained, and the reforming water pump 42 is controlled and maintained so as to obtain the obtained target rotational speed, and the parameter correction target output is obtained based on the output versus combustion chamber temperature information. The target combustion chamber temperature is obtained, and the amount of raw fuel gas supplied to the reforming burner 17 is adjusted by the burner raw fuel control valve V2 so that the detected temperature of the combustion temperature sensor Tf becomes the calculated target combustion chamber temperature. Maintain In addition, a target rotational speed corresponding to the supply amount of combustion fuel to the reforming burner 17 is obtained based on the output versus combustion blower rotational speed information, and the combustion blower is set to the obtained target rotational speed. In a state where 39 is controlled and maintained, the rotational speed of the selective oxidation blower 24 is changed and adjusted.
And while changing and adjusting the rotational speed of the selective oxidation blower 24, the temperature of the selective oxidation chamber 5 is set to the selective oxidation set temperature based on the detection information of the lower end selective oxidation temperature sensor Tb. The rotational speed of the selective oxidation blower 24 is obtained.

  In short, the supply amount of raw fuel gas to the reforming chamber 3 and the supply amount of reforming water to the steam generation chamber 2 are each maintained at an amount corresponding to the target output for parameter correction, and the reforming burner 17 The amount of fuel supplied to the combustion chamber is adjusted so that the detected temperature of the combustion temperature sensor Tf becomes the target combustion chamber temperature corresponding to the target output for parameter correction, and the rotational speed of the combustion blower 39 is In order to change and adjust the supply amount of the selective oxidation air to the selective oxidation chamber 5 while adjusting the rotation speed according to the supply amount of the combustion fuel to the reforming burner 17 obtained from the combustion fan rotation speed information. By changing and adjusting the rotational speed of the selective oxidation blower 24, the temperature of the selective oxidation chamber 5 is varied to change the rotational speed of the selective oxidation blower 24 so that the temperature of the selective oxidation chamber 5 becomes the set temperature for selective oxidation (that is, Air flow for selective oxidation ) Will be determined.

  Then, as shown in FIG. 12, output versus selective oxidation as shown by a solid line so that the target rotational speed of the selective oxidation fan 24 corresponding to the target output for parameter correction (that is, the target flow rate of selective oxidation air) is obtained. The fan rotational speed information is corrected as indicated by a broken line.

Next, the parameter correction operation will be described based on the flowchart shown in FIG.
Note that the target output P for parameter correction is set in, for example, four stages of P1, P2, P3, and P4. Incidentally, when the adjustment range of the power generation output of the fuel cell G is 250 to 1000 W, the target output P for parameter correction is set to, for example, four stages of 250 W, 500 W, 750 W, and 1000 W.

The variable n indicating the number of stages of the target output P for parameter correction is set to 1 (step # 11), the target output P for parameter correction is set to P1 (step # 12), the combustion adjustment mode, the reform adjustment The mode and the selective oxidation adjustment mode are sequentially executed (steps # 13 to # 15).
Subsequently, in step # 16, it is determined whether or not n has reached the set number N (for example, 4) of the target output P for parameter correction. If not, n is set in step # 17. Increase by one, increase target output P for parameter correction by one stage, and execute combustion adjustment mode, reforming adjustment mode, and selective oxidation adjustment mode in sequence at each parameter correction target output P (Steps # 13 to # 15) When n reaches the set stage number N, the process returns.

  That is, the combustion adjustment mode, the reforming adjustment mode, and the selective oxidation adjustment mode are sequentially executed in the order of description for each of the target outputs P for parameter correction in a plurality of stages.

That is, when executing the reforming adjustment mode, the control unit C is configured to execute the reforming adjustment mode after executing the combustion adjustment mode.
Further, the control unit C determines the parameter correction timing based on the accumulated operation time using the accumulated operation time obtained by integrating the operation time of the fuel cell power generation device as the operation progress information, and at the parameter correction timing, the reforming is performed. At least one of the adjustment mode for selective use, the adjustment mode for selective oxidation, and the adjustment mode for combustion is configured to be executed.

[Another embodiment]
Next, another embodiment will be described.
(A) In the above embodiment, the case where all of the adjustment mode for reforming, the adjustment mode for selective oxidation, and the adjustment mode for combustion are executed in the parameter correction operation is exemplified. Any one or two of the mode, the selective oxidation adjustment mode, and the combustion adjustment mode may be executed.
Further, the order of executing the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode is not limited to the order illustrated in the above embodiment, but the reforming adjustment mode Is preferably performed after the combustion adjustment mode.
Further, the adjustment mode to be executed may be changed every time the parameter correction timing comes.

(B) In the above embodiment, the normal operation mode is interrupted, and the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode are executed. However, in the normal operation mode, When it is predicted that the power generation output of the fuel cell G will be constant over a predetermined time required for executing the parameter correction operation, during the normal operation mode in which the power generation output is constant over a predetermined time. The reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode may be executed. For example, when the power load is predicted and the power generation output of the fuel cell G is adjusted so as to output the predicted power load, when the predicted power load is constant over a predetermined time, the reforming adjustment mode The selective oxidation adjustment mode and the combustion adjustment mode may be executed.

(C) The selective oxidation air supply path 25 is provided with a selective oxidation air flow sensor for detecting the flow rate of the selective oxidation air flowing therethrough, and the flow rate of the selective oxidation air is adjusted for this selective oxidation. You may comprise so that it may carry out by adjusting the rotational speed of the air blower 24 for selective oxidation based on the detection information of an air flow sensor.
In this case, as the output-to-selective oxidation air flow rate information, the output-to-selective oxidation fan rotational speed information obtained by substituting the selective oxidation air flow rate with the rotational speed of the selective oxidation blower 24 as in the above embodiment. Instead, the target flow rate of the selective oxidation air itself is determined according to the magnitude of the target output.
Therefore, in the normal operation mode, the target flow rate corresponding to the set target output is obtained based on the output versus selective oxidation air flow rate information, and the detected flow rate of the selective oxidation air flow rate sensor becomes the obtained target flow rate. Thus, the rotational speed of the selective oxidation blower 24 is adjusted.
In the selective oxidation adjustment mode, the selective oxidation is performed based on the detection information of the lower end selective oxidation temperature sensor Tb and the detection information of the selective oxidation air flow rate sensor while changing and adjusting the rotational speed of the selective oxidation blower 24. The flow rate of the selective oxidation air for setting the temperature of the chamber 5 to the selective oxidation set temperature is obtained.

(D) As the output-to-rotational speed information, the target rotational speed of the combustion blower 39 corresponding to the amount of fuel supplied to the reforming burner 17 is determined as in the above embodiment. The target rotational speed of the combustion blower 39 corresponding to the magnitude of the target output of the fuel cell G may be determined.
That is, the amount of combustion fuel supplied to the reforming burner 17 required for setting the temperature of the combustion chamber 6 to the target combustion chamber temperature corresponding to the target output of the fuel cell G can be predicted in advance. As the output-to-rotational speed information, the target rotational speed of the combustion blower 39 corresponding to the magnitude of the target output of the fuel cell G can be determined.

(E) The operation progress information for determining the parameter correction timing by the control unit C is not limited to the integrated operation time of the fuel cell power generation apparatus exemplified in the above embodiment. For example, the reforming chamber 3 The integrated raw fuel gas supply amount obtained by integrating the supply amount of the raw fuel gas to can be used.
Further, the parameter correction timing by the control unit C may be determined based on the passage of time. For example, you may comprise so that it may discriminate | determine when parameter correction timing comes for every setting period (for example, 1 month).
Further, the control unit C determines the parameter correction timing and automatically executes at least one of the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode at the parameter correction timing. Alternatively, at least one of the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode may be executed by an artificial command.

(F) The hydrocarbon-based raw fuel is not limited to the natural gas-based city gas (13A) exemplified in the above embodiment, and various kinds of fuels such as alcohols such as propane gas and methanol are used. Can be used.

Block diagram of fuel cell power generator Longitudinal section of the fuel gas generator Perspective view of container Perspective view of container Perspective view of container The figure which shows the flowchart of control action The figure which shows the flowchart of control action Diagram showing the relationship between target output and target raw fuel gas flow rate Diagram showing the relationship between target output and target combustion chamber temperature The figure which shows the relationship between the target output and the target rotational speed of the reforming water pump The figure which shows the relationship between the supply amount of the fuel for combustion, and the rotational speed of the blower for combustion The figure which shows the relationship between target output and the target rotational speed of the fan for selective oxidation The figure which shows the relationship between the rotational speed of the blower for combustion, and the combustion chamber temperature

Explanation of symbols

3 reforming chamber 5 selective oxidation chamber 6 combustion chamber 17 reforming burner 24 selective oxidation blower means 39 combustion blower means C control means G fuel cell P fuel gas generator Tb selective oxidation chamber temperature detection means Tf combustion chamber temperature detection means Tr reforming chamber temperature detection means

Claims (6)

A reforming chamber that generates a reforming treatment gas containing hydrogen gas as a main component by reforming and reacting a hydrocarbon-based raw fuel to be supplied with water vapor, and burning a combustion fuel in a reforming burner, A fuel gas generation unit that generates a fuel gas mainly composed of hydrogen gas, and includes a combustion chamber that heats the reforming chamber so that the reforming treatment can be performed,
A fuel cell that is supplied with the fuel gas generated in the fuel gas generator and generates power;
Control means for controlling the operation,
In the normal operation mode, the control means adjusts the amount of raw fuel supplied to the reforming chamber so as to adjust the power generation output of the fuel cell to the target output, and the temperature of the reforming chamber is set appropriately. A fuel cell power generator configured to adjust a supply amount of fuel for combustion to the reforming burner so as to reach a temperature,
Reforming chamber temperature detecting means for detecting the temperature of the reforming chamber and combustion chamber temperature detecting means for detecting the temperature of the combustion chamber are provided,
In the normal operation mode, the control means outputs a predetermined combustion chamber temperature information for the combustion chamber according to the magnitude of the target output of the fuel cell, and the target output of the fuel cell. The target combustion chamber temperature is obtained based on the combustion chamber temperature detection means, and based on the detection information of the combustion chamber temperature detection means, the combustion fuel to the reforming burner is set so that the temperature of the combustion chamber becomes the obtained target combustion chamber temperature. And is configured to adjust the supply amount of
It is configured to be switchable to the reforming adjustment mode, and in the reforming adjustment mode, the amount of raw fuel supplied to the reforming chamber is set so that the power generation output of the fuel cell becomes the target output for parameter correction. The combustion for adjusting and maintaining the temperature of the reforming chamber to the set appropriate temperature based on the detection information of the reforming chamber temperature detection means and the detection information of the combustion chamber temperature detection means In order to obtain the temperature of the chamber, the supply amount of the fuel for combustion to the reforming burner is changed and adjusted, and the output versus combustion chamber temperature information is corrected based on the obtained temperature of the combustion chamber. The fuel cell power generator. A selective oxidation chamber that selectively oxidizes carbon monoxide in the reforming process gas reformed in the reforming chamber with selective oxidation air supplied by a selective oxidation blower, and the selective oxidation thereof And a selective oxidation chamber temperature detecting means for detecting the chamber temperature,
In the normal operation mode, the control means outputs a predetermined oxidation target air flow rate information in accordance with a target output magnitude of the fuel cell, and a target output of the fuel cell. And the rotational speed of the selective oxidation blowing means is adjusted so that the flow rate of the selective oxidation air supplied to the selective oxidation chamber becomes the calculated target flow rate. ,as well as,
The supply amount of the raw fuel to the reforming chamber is configured to be switchable to the selective oxidation adjustment mode, and in the selective oxidation adjustment mode, the power generation output of the fuel cell is set to the target output for parameter correction. The selective oxidation is performed in order to obtain the flow rate of the selective oxidation air for setting the temperature of the selective oxidation chamber to the set appropriate temperature based on the detection information of the selective oxidation chamber temperature detecting means. 2. The fuel cell power generator according to claim 1, wherein the output speed of the selective oxidation air flow information is corrected based on the flow rate of the selective oxidation air obtained by changing and adjusting the rotational speed of the air blowing means. . In the normal operation mode, the control means supplies combustion air to the reforming burner according to a target output level of the fuel cell or a supply amount of combustion fuel to the reforming burner. A target rotational speed based on predetermined output versus rotational speed information and a target output of the fuel cell or a supply amount of combustion fuel to the reforming burner, and the combustion air flow Configured to adjust the target rotational speed determined means; and
It is configured to be switchable to a combustion adjustment mode, and in the combustion adjustment mode, the supply amount of raw fuel to the reforming chamber is adjusted so that the power generation output of the fuel cell becomes the target output for parameter correction. And maintaining the combustion chamber temperature at the target combustion chamber temperature determined based on the output versus combustion chamber temperature information and the parameter correction target output. In order to determine the rotational speed of the combustion air blowing means for maintaining the supply amount in an adjusted state and making the temperature of the combustion chamber maximum or substantially maximum based on the detection information of the combustion chamber temperature detection means The output speed versus rotational speed information is modified based on the calculated rotational speed of the combustion air blowing means by changing and adjusting the rotational speed of the combustion air blowing means. fuel Pond power generation equipment.   The fuel cell power generator according to claim 3, wherein the target output for parameter correction is set in a plurality of stages.   5. The fuel according to claim 3, wherein when the control means executes the reforming adjustment mode, the reforming adjustment mode is executed after the combustion adjustment mode is executed. Battery power generator.   The control means determines a parameter correction timing based on the operation progress information, and at the parameter correction timing, at least one of the reforming adjustment mode, the selective oxidation adjustment mode, and the combustion adjustment mode. The fuel cell power generator according to claim 3, wherein the fuel cell power generator is configured to execute one of the two.

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