JP5103047B2 - Vaporizer, hydrogen production device and fuel cell system - Google Patents

Description

  The present invention relates to a vaporizer for vaporizing a liquid. The present invention also relates to a hydrogen production apparatus that produces hydrogen using liquid fuel such as kerosene, and a fuel cell system that generates power using a hydrogen-containing gas obtained from such a hydrogen production apparatus.

  In a fuel cell system, normally, reformed raw materials such as kerosene and city gas are reformed to produce a hydrogen-containing gas (reformed gas), and the resulting hydrogen-containing gas and air are supplied to the cell stack for electricity. Power is generated by chemical reaction.

  Various reactions such as steam reforming and partial oxidation reforming are used for reforming. In any reaction, when the reforming raw material is liquid fuel, the liquid fuel is vaporized and then used as a reformer. Supply.

  In general, when a liquid is vaporized, pressure fluctuation occurs due to local bumping, and accordingly, flow fluctuations of the liquid and vaporized gas occur. In the fuel cell system, the pressure fluctuation generated when the liquid fuel is vaporized and the flow fluctuation associated therewith lead to the flow fluctuation of the reformed gas and the voltage fluctuation of the fuel cell.

  In a fuel cell, the voltage fluctuation increases as the current density increases. Therefore, when the flow rate variation of the reformed gas is large, it becomes difficult to extract a large current from the fuel cell, and as a result, the output density and the power generation efficiency are lowered. In addition, when the voltage fluctuation is large, there is a possibility that the deterioration of the cell is accelerated.

Patent Document 1 describes that in a hydrogen generator, the evaporation rate of water is made constant by using a flow of a source gas, and pressure fluctuation due to volume expansion when water is vaporized is described.
Japanese Patent Laid-Open No. 2002-211905

  As described above, the pressure fluctuation generated when the liquid fuel is vaporized and the flow fluctuation accompanying it lead to the flow fluctuation of the reformed gas and the voltage fluctuation of the fuel cell. In addition, when water (liquid) is vaporized to obtain water vapor and fuel is reformed using this water vapor, pressure fluctuation and flow fluctuation that occur when water vaporizes are caused by reformed gas flow fluctuation and fuel cell. May lead to voltage fluctuations.

  Another object of the present invention is to form a hydrogen-containing gas by reforming the fuel after vaporizing the liquid fuel and reforming the fuel using water vapor obtained by vaporizing water. An object of the present invention is to provide a hydrogen production apparatus capable of suppressing the pulsation of the flow rate of the contained gas.

  Still another object of the present invention is to obtain a hydrogen-containing gas by reforming the fuel after vaporizing the liquid fuel and reforming the fuel using water vapor obtained by vaporizing water. Another object of the present invention is to provide a fuel cell system capable of suppressing the pulsation of the flow rate of the hydrogen-containing gas when power generation is performed using the hydrogen-containing gas, and thereby suppressing the voltage fluctuation.

A vaporizer having a vaporizer for vaporizing liquid fuel and a liquid fuel supply line for supplying liquid fuel to the vaporizer, wherein a gas-sealed container is connected to the liquid fuel supply line; and wherein the vaporized liquid fuel obtained from the vaporizer is reformed to have a reformer for obtaining a hydrogen-containing gas,
The container in which the gas is sealed has a gas phase portion and a liquid phase portion, and the volume of the gas phase portion is determined according to an allowable fluctuation range of the liquid fuel flow rate or the gas flow rate at which the liquid fuel is vaporized. And
Here, the volume of the gas phase part is set such that the vibration period unique to the gas phase part is set to be twice or more larger than the pressure fluctuation period .
In addition, a gas sealing line, which is a line for gas sealing, provided with gas boosting means is connected to the container,
In the gas sealing line, between the container and the gas pressure increasing means, from the container toward the gas pressure increasing means,
A purge line branched from the gas filling line; and
It is preferable that a preliminary gas enclosure, an integrated flow rate measuring unit, or a flow rate measuring unit is provided in this order.

According to the present invention, there is provided a vaporizer for vaporizing liquid fuel and a liquid fuel supply line for supplying liquid fuel to the vaporizer, wherein a gas-sealed container is connected to the liquid fuel supply line;
Have a fuel cell for generating electric power by using the and hydrogen-containing gas obtained from the reformer; reformer obtaining reformed hydrogen-containing gas vaporized liquid fuel obtained from said vaporizer
The container in which the gas is sealed has a gas phase portion and a liquid phase portion, and the volume of the gas phase portion is determined according to an allowable fluctuation range of the liquid fuel flow rate or the gas flow rate at which the liquid fuel is vaporized. And
Here, the fuel cell system is characterized in that the volume of the gas phase part is set so that the vibration period unique to the gas phase part becomes twice or more larger than the pressure fluctuation period .
In addition, a gas sealing line, which is a line for gas sealing, provided with gas boosting means is connected to the container,
In the gas sealing line, between the container and the gas pressure increasing means, from the container toward the gas pressure increasing means,
A purge line branched from the gas filling line; and
It is preferable that a preliminary gas enclosure, an integrated flow rate measuring unit, or a flow rate measuring unit is provided in this order.

The present invention, modified in terms of vaporized liquid fuel during the production of hydrogen-containing gas, the flow rate capable of suppressing hydrogen generating device of the pulsation of the hydrogen-containing gas is provided.

The present invention, modified in terms of vaporized liquid fuel to produce a hydrogen-containing gas, in performing power generation using the hydrogen-containing gas obtained, can suppress the pulsation of the flow rate of the hydrogen-containing gas, Accordingly, a fuel cell system capable of suppressing voltage fluctuation is provided.

Hereinafter, the present invention will be described with reference to the drawings, but the present invention is not limited thereto. The present invention relates to a hydrogen production apparatus and a fuel cell system both equipped with a vaporizer, and the vaporizer includes a vaporizer for vaporizing liquid fuel and a liquid fuel supply line, and a container filled with gas is provided in the vaporizer. Further, the container has a gas phase portion and a liquid phase portion, and the volume of the gas phase portion is determined in a specific manner as described above. Other cases may be mentioned below, but this is for reference only.

[Vaporizer]
FIG. 1 shows an embodiment of the vaporizer according to the present invention (however, this embodiment is for reference) .

  The liquid supplied from a supply source such as a tank or a pipeline is supplied to the vaporizer 2 through the liquid supply line 1 for supplying the liquid to the vaporizer 2. The liquid supply line 1 is provided with a liquid boosting pump 3 as necessary. In the vaporizer, the liquid is vaporized, and a gas in which the liquid is vaporized is obtained.

  A container (hereinafter referred to as a gas-sealed container) 5 in which a gas is sealed is connected to the liquid supply line 1. Here, the gas enclosure is connected to the liquid supply line via the branch line 4.

  In addition to the branch line, a line 6 used for gas sealing is connected to the gas sealing container. The line 6 is provided with a channel opening / closing means 7. By closing the flow path opening / closing means 7, gas can be enclosed in the gas enclosure. As the flow path opening / closing means, known means capable of opening and closing the flow path, such as a stop valve, a blank cover, and a blank flange, can be appropriately used. The line 6 and the flow path opening / closing means 7 are not necessarily provided, but it is preferable to provide the line 6 and the flow path opening / closing means 7 from the viewpoint of ease of operation, and it is more preferable to use a stop valve as the flow path opening / closing means. .

  Such a vaporizer can be used as follows. First, the flow path opening / closing means 7 is opened, the pump 3 is activated to allow the liquid to flow through the liquid supply line 1, and the liquid level is raised from the branch line 4 into the gas enclosure 5. If the flow path opening / closing means 7 is closed when the liquid level reaches a predetermined position, the outside air (atmosphere) is enclosed in the gas enclosure. At this time, the vaporizer is activated as necessary.

  Alternatively, as shown in FIG. 3, after the flow path opening / closing means 7, a flow path switching means 11, a spare gas enclosure 8, a flow path opening / closing means 9, a gas boosting means 10 such as a compressor are provided, and liquid supply The flow path opening / closing means 12 and the flow path switching means 13 may be provided downstream from the connection portion of the line 1 with the gas enclosure. In this case, first, the flow path opening / closing means 7 is opened, the flow path switching means 11 is switched so that the line 16 and the purge line 18 circulate, the flow path opening / closing means 9 is closed, the flow path opening / closing means 12 is closed, and the flow path switching is performed. The means 13 is switched so that the line 19 and the purge line 21 are circulated. Thereafter, the pump 3 is started, the liquid fuel supply line 1 to the purge line 18 are filled with liquid, and the pump 3 is stopped. Thereafter, the flow path opening / closing means 9 is opened, the pressure of the gas is increased to a pressure determined in advance according to the amount of gas replenished in advance by the gas pressure increasing means 10, the flow path opening / closing means 9 is closed, the gas pressure increasing means 10 is stopped, The path switching means 11 is switched so that the line 16 and the line 17 circulate, and the flow path opening / closing means 12 is opened. By doing in this way, the gas accumulated between the flow path switching means 11 and the flow path opening / closing means 9 flows into the gas enclosure 5 and the gas is sealed by closing the flow path opening / closing means 7. Thereafter, the flow path switching means 13 is switched so that the line 19 and the line 20 circulate, and the pump 3 may be activated when supplying the liquid to the vaporizer.

  When the volume of the sealed gas decreases due to absorption or dissolution in the liquid to be vaporized, the flow path opening / closing means 7 is first closed, and the flow path switching means 11 is made to circulate through the lines 16 and 17. In this state, the flow path opening / closing means 9 is closed, the flow path opening / closing means 12 is closed, and the flow path switching means 13 is switched so that the line 19 and the purge line 21 circulate. Thereafter, the flow path opening / closing means 9 is opened, the pressure of the gas is increased to a pressure determined in advance according to the amount of gas replenished in advance by the gas pressure increasing means 10, the flow path opening / closing means 9 is closed, the gas pressure increasing means 10 is stopped, The path opening / closing means 7 and the channel opening / closing means 12 are opened. By doing so, the gas accumulated between the flow path opening / closing means 7 and the flow path opening / closing means 9 flows into the gas enclosure, and the flow path opening / closing means 7 is closed to enclose the gas.

  In the case of the embodiment of FIG. 3, the amount of gas supplied to the gas phase part is defined by the flow path volume (including the volume of the spare gas enclosure 8) from the flow path opening / closing means 7 to the flow path opening / closing means 9 and the pressure. However, as shown in FIG. 4, the integrated flow rate measuring means 14 or the flow rate measuring means (not shown) is provided upstream from the flow path switching means 7, and the gas pressure increasing means 10 is set only during the flow of a predetermined amount of gas. The amount of gas supplied to the gas phase part may be defined by operating and opening the flow path opening / closing means 7. In this case, first, the flow path opening / closing means 7 is opened, the flow path switching means 11 is switched so that the line 16 and the purge line 18 circulate, the flow path opening / closing means 12 is closed, and the flow path switching means 13 is switched to the line 19 and the purge line. Switch so that 21 is distributed. Thereafter, the pump 3 is started, the liquid fuel supply line 1 to the purge line 18 are filled with liquid, and the pump 3 is stopped. Thereafter, the flow path switching means 11 is switched so that the line 16 and the line 17 flow, the flow path opening / closing means 12 is opened, the gas pressure increasing means 10 is operated, and after a predetermined amount of gas has flowed, the gas pressure increasing means 10 is stopped. Then, the flow path opening / closing means 7 is closed. By doing so, a predetermined amount of gas is enclosed in the gas enclosure 5. Thereafter, the flow path switching means 13 is switched so that the line 19 and the line 20 circulate, and the pump 3 may be activated when supplying the liquid to the vaporizer.

  When the volume of the sealed gas decreases due to absorption or dissolution in the liquid to be vaporized, first, the flow path opening / closing means 7 is closed, and the flow path switching means 11 is switched so that the lines 16 and 17 circulate. The opening / closing means 12 is closed, and the flow path switching means 13 is switched so that the line 19 and the purge line 21 circulate. Thereafter, the flow path opening / closing means 7 and the flow path opening / closing means 12 are opened, the gas pressure increasing means 10 is operated, and after a predetermined amount of gas has circulated, the gas pressure increasing means 10 is stopped and the flow path opening / closing means 7 is closed. By doing in this way, a predetermined amount of gas is enclosed with a gas enclosure.

  As the flow path switching means, known means capable of switching the flow path, such as a combination of a three-way valve and a stop valve, can be used as appropriate.

  As the integrated flow rate measuring means, a known measuring device capable of measuring the integrated flow rate such as an integrated flow meter can be used as appropriate.

  As the flow rate measuring means, a known measuring device capable of measuring the flow rate, such as a flow meter, can be used as appropriate. In this case, the amount of gas passing can be known from the flow rate measured by the flow rate measuring means and the gas circulation time.

  In FIG. 1, there is a boundary surface between the gas phase portion 5 a and the liquid phase portion 5 b inside the gas enclosure 5. However, this is not necessarily the case, and there may be a boundary surface in the branch line 4 branched from the liquid supply line 1. At this time, the inside of the gas-filled container is entirely in the gas phase.

  Moreover, it is not necessary to provide a branch in the liquid supply line as shown in FIG. 1 and connect the gas enclosure, and the gas enclosure may be connected in the middle of the liquid supply line as shown in FIG. In short, it is sufficient that the enclosed gas is in contact with the liquid flowing through the liquid supply line.

  The volume of the gas phase part 5a in the gas enclosure can be appropriately determined according to the liquid flow rate or the allowable fluctuation range of the gas flow rate at which the liquid is vaporized. At this time, it is desirable to determine the volume so that the vibration period peculiar to the gas phase part becomes twice or more larger than the pressure fluctuation period.

The details will be described below. P is the pressure [Pa] of the sealed gas, ΔP is the fluctuation range [Pa] of the pressure (P), T _p is ½ [s] of the fluctuation period of the pressure (P), and A is the gas phase part (5a) / The boundary area [m ² ] of the liquid phase part (5b), V is the volume of the enclosed gas (sum of the internal volume of the gas phase part 5a and the line 6) [m ³ ], m is the liquid supply line (liquid fuel supply line 1 Alternatively, the water supply line 15 described later, where the liquid fuel supply line 1 or the water supply line 15 also includes the lines 19 and 20), the branch line 4, the liquid phase part 5b, and the liquid mass in the vaporizer 2. [Kg], γ is the specific heat ratio of the sealed gas [−], η is the proportional coefficient [Ns / m] where the viscous resistance of the liquid is proportional to the flow velocity,

Then, the decrease amount ΔF of the liquid flow rate fluctuation range can be estimated by the following equation.

  Further, the vibration period T specific to the gas phase can be estimated by the following equation.

From the above formula, the value obtained by subtracting the decrease amount (ΔF) of the liquid flow rate fluctuation range from the liquid flow rate fluctuation range when the gas is not sealed is less than the allowable value, and preferably the vibration period (T ) Is equal to or greater than twice the pressure fluctuation period (2T _p ), the boundary area between the gas phase / liquid phase and the volume of the enclosed gas may be obtained to determine the volume of the gas phase.

  As the liquid to be vaporized, a known liquid that can be vaporized by a vaporizer can be appropriately used. For example, water or liquid fuel can be used.

  As the liquid fuel, a combustible substance that is liquid at normal temperature and normal pressure (25 ° C., 0.101 MPa) can be used as appropriate. For example, compounds having carbon and hydrogen in the molecule such as hydrocarbons and alcohols can be used. Preferable examples that can be obtained at low cost for industrial use or consumer use include methanol, ethanol, gasoline, kerosene, and light oil. Of these, kerosene is preferable because it is easily available for industrial use and for consumer use, and is easy to handle.

  The gas to be sealed in the gas-sealed container is a gas that hardly absorbs or dissolves in the liquid to be vaporized and further does not react with the liquid to be vaporized under the conditions to be used, and further a reforming catalyst or electrode downstream of the vaporizer. For example, in addition to air, an inert gas such as nitrogen, argon, or helium can be used.

  As the gas sealed container, a sealable container can be used as appropriate. In consideration of resistance to the use environment, the material of the gas enclosure and the thickness of the wall may be appropriately designed.

  The liquid supply line can also be appropriately configured using a piping member. In consideration of resistance to the use environment, the material of the piping member and the thickness of the wall may be appropriately designed.

  As a vaporizer, the well-known vaporizer which can vaporize a liquid can be utilized suitably. As an example thereof, a vaporizer having a structure capable of heating a pipe through which a liquid flows from the outside and evaporating the liquid in the pipe can be exemplified. In this case, from the viewpoint of reducing fluctuations in the flow rate or pressure of the vaporized gas, it is preferable to provide a plurality of pipes (liquid fuel supply line 1) through which the liquid flows in parallel, or to fill the pipes with particles. Moreover, the vaporizer which has a structure which heats heating members, such as an evaporating dish and an evaporation container, can be made to contact this and can be evaporated can also be mentioned. For such heating, an electric heater, combustion gas, or the like can be used as a heat source.

  According to the present invention, it is possible to mitigate the continuous pressure fluctuation that occurs in the vaporizer in a relatively short cycle by the gas sealed in the gas-sealed container, thereby reducing the pulsation of the liquid flow rate. As a result, the pulsation of the flow rate of the gas in which the liquid is vaporized is suppressed. In particular, in a fuel cell system, by connecting a gas-filled container to a liquid fuel supply line, voltage fluctuations of the fuel cell can be reduced, contributing to improvement in power generation efficiency and suppression of cell deterioration.

  It is also conceivable to provide a gas buffer tank downstream of the vaporizer and suppress the pulsation of the flow rate of the gas vaporized by the liquid by the buffer tank. However, according to the study by the present inventors, it has been found that it is important to suppress the pulsation of the flow rate of the liquid in order to suppress the pulsation of the flow rate of the gas vaporized from the liquid. Rather than providing a gas buffer tank downstream of the vaporizer, providing a gas-sealed container upstream of the vaporizer has a greater effect of preventing the pulsation of the flow rate of the gas vaporized from the liquid.

[Hydrogen production equipment / fuel cell system]
Using the vaporization apparatus of the present invention, liquid fuel is vaporized, the vaporized fuel is reformed by a reformer to obtain a reformed gas, and further processed as necessary to produce a hydrogen-containing gas. it can. Furthermore, power can be generated by supplying a hydrogen-containing gas to the anode of the fuel cell. At this time, since the pulsation of the flow rate of the gas vaporized by the liquid fuel can be suppressed, the pulsation of the flow rate of the hydrogen-containing gas obtained from the hydrogen production apparatus can be suppressed, and the voltage fluctuation of the fuel cell can be suppressed.

  An embodiment of the hydrogen production apparatus and the fuel cell system of the present invention will be described with reference to FIG. 5 using kerosene as an example of liquid fuel. FIG. 5 shows a main configuration of the fuel cell system.

  Kerosene supplied from a supply source such as a tank or a pipeline passes through the liquid supply line 1 and is vaporized by the vaporizer 2. A pump 3 is provided in the liquid supply line as necessary. The gas enclosure 5 is connected to the liquid supply line. Up to this point, the configuration of the vaporizer already described can be employed.

  The vaporized kerosene obtained by the vaporizer is supplied to the reformer 30. Here, steam is also supplied to the reformer to perform steam reforming. In order to perform partial oxidation reforming, oxygen (not only pure oxygen but also an oxygen-containing gas such as air) is supplied to the reformer. In the reformer, kerosene is reformed to obtain a reformed gas containing hydrogen.

  The reformed gas is supplied to the anode A of the fuel cell 40 as an anode gas. An oxygen-containing gas such as air is supplied as a cathode gas to the cathode C of the fuel cell. In the fuel cell, hydrogen contained in the anode gas and oxygen contained in the cathode gas react electrochemically to generate power. Since the anode off-gas discharged from the anode contains a combustible component, the amount of heat can be appropriately utilized by combustion or the like. Further, the sensible heat of the anode off gas and the cathode off gas discharged from the cathode is also used as appropriate.

In FIG. 5 , the hydrogen production apparatus is upstream from the reformer 30.

Although FIG. 5 shows a case where the liquid to be vaporized is liquid fuel, the case where the liquid to be vaporized is water will be described with reference to FIG. The configuration of the vaporizer is the same as that described above except that the liquid is water instead of liquid fuel. FIG. 6 shows a water supply line 15 as a liquid supply line instead of the liquid fuel supply line.

  Water is vaporized by a vaporizer (having a pump 3, a water supply line 15, a gas enclosure 5, a flow path opening / closing means 7, and a vaporizer 2) to become water vapor. This water vapor and separately prepared fuel are supplied to the reformer 30. At this time, the fuel is vaporized in advance as necessary and supplied as fuel gas. When liquid fuel is used as the fuel, it is preferable to use the vaporizer of the present invention for vaporizing the liquid fuel.

  The fuel is reformed using steam in the reformer to obtain a hydrogen-containing gas. That is, in this reformer, at least a steam reforming reaction occurs as a reforming reaction, but it may be accompanied by a partial oxidation reaction. Similar to the embodiment shown in FIG. 3, the hydrogen-containing gas obtained from the reformer is further subjected to a treatment such as a shift reaction if necessary, and is used in the fuel cell 40.

  When water is vaporized using the vaporizer of the present invention, a known fuel (including the above-described liquid fuel) that can produce hydrogen by reforming can be used as the reforming raw material as appropriate. As this fuel, a compound containing carbon and hydrogen in the molecule (may contain other elements such as oxygen) or a mixture thereof can be used, and a compound having carbon and hydrogen in the molecule such as hydrocarbons and alcohols. Can be used. For example, hydrocarbon fuels such as methane, ethane, propane, butane, natural gas, LPG, city gas, gasoline, naphtha, kerosene, and light oil, alcohols such as methanol and ethanol, ethers such as dimethyl ether, and the like.

In the hydrogen production apparatus and the fuel cell system, the reformed gas obtained from the reformer can be further processed as necessary. For example, a shift reaction (CO + H ₂ O → CO ₂ + H ₂ ) for reducing the carbon monoxide concentration and increasing the hydrogen concentration, a selective oxidation reaction (2CO + O ₂ → 2CO ₂ ) for reducing the carbon monoxide concentration, humidification or dehumidification Etc. can be performed. Therefore, when power generation is performed by a fuel cell using a hydrogen-containing gas obtained from a reformer, the reformed gas obtained from the reformer may be used directly in the fuel cell, or the reformed gas may be used for a shift reaction or the like. You may use with a fuel cell after processing.

  Further, desulfurization for reducing the concentration of sulfur contained in the liquid fuel can be performed as necessary. When desulfurization is performed in the gas phase, a desulfurizer may be provided between the vaporizer 2 and the reformer 30.

  As the reformer, a known reformer capable of performing steam reforming, partial oxidation reforming or autothermal reforming (performing both steam reforming reaction and partial oxidation reforming reaction) may be appropriately used. it can. When a heat source is required in the reformer, for example, available high-temperature gas can be used as appropriate. As a specific example, a combustion gas obtained by burning liquid fuel or anode off gas can be used as a heat source.

  As the fuel cell, a fuel cell that electrochemically reacts hydrogen can be used as appropriate. For example, a fuel cell of a solid polymer type, a phosphoric acid type, a molten carbonate type, or a solid oxide type can be employed.

  In addition to the above devices, known components of a hydrogen production apparatus and a fuel cell system using a reforming reaction can be appropriately provided as necessary. Specific examples include a steam generator for supplying steam to a reformer and a fuel cell, a cooling system for cooling various devices such as a fuel cell, a pump, a compressor, and a blower for pressurizing various fluids. Pressurizing means such as a flow rate adjusting means such as a valve for adjusting the flow rate of the fluid or shutting off / switching the fluid flow, a flow path shutting / switching means, a heat exchanger for performing heat exchange and heat recovery , Condensers that condense gases, heating / heat insulation means for externally heating various devices with steam, storage means for various fluids, air and electrical systems for instrumentation, signal systems for control, control devices, for output and power The electrical system.

  The fuel cell system of the present invention can be used for, for example, a stationary or mobile power generation system, and a cogeneration system.

  The hydrogen production apparatus of the present invention can be suitably used for producing a hydrogen-containing gas to be supplied to a fuel cell.

  The vaporizer of the present invention can be suitably used for vaporizing a liquid reforming raw material in a hydrogen production apparatus.

It is a schematic view for illustrating one embodiment of a vaporization device. It is a schematic diagram for explaining another form status of the vaporization apparatus. It is a schematic diagram for explaining another embodiment of the gas apparatus. It is a schematic diagram for explaining another form status of the vaporization apparatus. It is a schematic diagram for demonstrating one form of the hydrogen production apparatus and fuel cell system of this invention. It is a schematic diagram for explaining a reference embodiment of the hydrogen production apparatus and a fuel cell system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid fuel supply line 2 Vaporizer 3 Pump 4 Branch line 5 Gas enclosure 5a Gas phase part 5b Liquid phase part 6 Line 7 Flow path opening / closing means 8 Gas (preliminary) enclosure 9 Flow path opening / closing means 10 Gas pressure raising means 11 Flow Channel switching means 12 Channel switching means 13 Channel switching means 14 Integrated flow rate measuring means 15 Water supply line 16 Line 17 Line 18 Purge line 19 Line 20 Line 21 Purge line 30 Reformer 40 Fuel cell

Claims (4)

A vaporizer for vaporizing liquid fuel and a liquid fuel supply line for supplying liquid fuel to the vaporizer, wherein a gas-sealed container is connected to the liquid fuel supply line; and from the vaporizer the vaporized liquid fuel obtained by reforming have a reformer for obtaining a hydrogen-containing gas,
The container in which the gas is sealed has a gas phase portion and a liquid phase portion, and the volume of the gas phase portion is determined according to an allowable fluctuation range of the liquid fuel flow rate or the gas flow rate at which the liquid fuel is vaporized. And
Here, the volume of the gas phase part is set so that the vibration period unique to the gas phase part is larger than twice the pressure fluctuation period . A gas sealing line, which is a line for gas sealing, provided with gas boosting means is connected to the container,
In the gas sealing line, between the container and the gas pressure increasing means, from the container toward the gas pressure increasing means,
A purge line branched from the gas filling line; and
2. The hydrogen production apparatus according to claim 1 , wherein a spare gas enclosure, an integrated flow rate measuring unit, or a flow rate measuring unit is provided in this order. A vaporizer having a vaporizer for vaporizing liquid fuel and a liquid fuel supply line for supplying liquid fuel to the vaporizer, wherein a container filled with gas is connected to the liquid fuel supply line;
Have a fuel cell for generating electric power by using the and hydrogen-containing gas obtained from the reformer; reformer obtaining reformed hydrogen-containing gas vaporized liquid fuel obtained from said vaporizer
The container in which the gas is sealed has a gas phase portion and a liquid phase portion, and the volume of the gas phase portion is determined according to an allowable fluctuation range of the liquid fuel flow rate or the gas flow rate at which the liquid fuel is vaporized. And
Here, the volume of the gas phase part is set so that the vibration period unique to the gas phase part is twice or more larger than the pressure fluctuation period . A gas sealing line, which is a line for gas sealing, provided with gas boosting means is connected to the container,
In the gas sealing line, between the container and the gas pressure increasing means, from the container toward the gas pressure increasing means,
A purge line branched from the gas filling line; and
4. The fuel cell system according to claim 3 , wherein a spare gas enclosure, an integrated flow rate measuring unit or a flow rate measuring unit is provided in this order.

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