JP2000281311A - Reforming device for fuel cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reforming device for fuel cell capable of being miniaturized and improving the reforming efficiency of the steam reforming reaction. SOLUTION: This reforming device 2 is provided with a cylindrical body 21 having a catalyst layer 47 packed with a reforming catalyst and a burner 24 for supplying the combustion gas to the cylindrical body 21. The temp. of the catalyst layer 47 is raised by the combustion gas from the burner 24, and the fuel and steam are introduced into the catalyst layer 47 whose temp. is raised to generate a reformed gas. In such a case, a fuel supply pipe 39 and a water supply pipe 40 are provided, the water supply pipe 40 is charged into a passage 25a for the combustion gas from the burner 24 to convert the water flowing through the water supply pipe 40 into steam by the heat of the combustion gas, the water supply pipe 40 is discharged from the passage 25a for the combustion gas and connected to the fuel gas supply pipe 39 to join the fuel flowing through the fuel supply pipe 39 with the steam flowing through the water supply pipe 40, thereby introducing them to the catalyst layer 47.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reformer for a fuel cell which generates hydrogen by performing a steam reforming reaction of fuel and steam under a catalyst heated in a combustor.

[0002]

2. Description of the Related Art In general, there is known a fuel cell power generation system that generates hydrogen from a hydrocarbon-based fuel and generates power using the hydrogen and oxygen in the air. A reformer (reformer for a fuel cell) is used to convert system fuel into hydrogen.

In FIG. 4, reference numeral 100 denotes a reformer of a conventional fuel cell system. The reformer 100 includes a reformer body 101 and a separate steam generator for supplying steam to the reformer body 101. Machine 102. Further, the reformer main body 101 includes a cylinder 114 and a combustion cylinder 111 extending inside the cylinder 114.

A burner 112 is built in the end of the combustion cylinder 111, and a blower 113 is provided in the combustion cylinder 111. The combustion fuel gas supply pipe 116 and the fuel cell unreacted gas pipe 117 are connected to the burner 112, and the combustion fuel gas and the fuel cell unreacted gas are passed through the burner 112 respectively.
12 is supplied.

The cylindrical body 114 has a quadruple cylindrical wall structure, and includes a first cylindrical wall 121, a second cylindrical wall 122, a third cylindrical wall 123, and a fourth cylindrical wall 124 from inside. The reforming catalyst is filled between the first cylinder wall 121 and the second cylinder wall 122 to form a catalyst layer 131. Further, a combustion exhaust pipe 125, a reformed gas outlet pipe 126, and a mixed gas introduction pipe 127 are connected to the cylindrical body 114. Mixed gas introduction pipe 127
Is branched into a fuel gas supply pipe 128 and a steam supply pipe 129 on the way, and the steam supply pipe 129 is connected to the steam generator 10.
2 is connected. Reference numeral 130 denotes a water pipe that supplies water to the steam generator 102.

When the burner 112 is burning, the combustion gas generated by the combustion moves in the direction indicated by the dotted arrow. That is, the combustion gas moves inside the combustion cylinder 111, between the combustion cylinder 111 and the first cylinder wall 121, between the third cylinder wall 123 and the fourth cylinder wall 124, and inside the combustion exhaust gas pipe 125. The combustion gas is led to the outside.

A water pipe 130 is connected to the steam generator 102.
Is supplied to the steam through the steam generator 102, and the water is converted into steam by the steam generator 102. The steam is supplied to the steam supply pipe 129, and the steam of the steam supply pipe 129 and the fuel gas from the fuel gas supply pipe 128 are combined. To form a mixed gas. The mixed gas of the fuel gas and the steam is supplied to the reformer main body 101 through the mixed gas introduction pipe 127. In the reformer main body 101, the mixed gas is supplied to the first cylinder wall 121 and the second cylindrical wall 121.
The mixed gas is heated to the reaction temperature by the combustion gas and steam reformed in the catalyst layer 131 between the cylindrical walls 122, and is converted into a reformed gas containing hydrogen and carbon monoxide. Is done. Thereafter, the reformed gas passes through a reformed gas outlet pipe 126, for example, a carbon monoxide shifter (not shown) for converting carbon monoxide in the reformed gas into carbon dioxide.
Sent to

[0008]

However, in the above-described reformer 100, the steam generator 102 for supplying steam to the reformer main body 101 is provided separately from the reformer main body 101. There is a problem that the reformer 100 becomes large.

In the reformer main body 101, the burner 11
During the combustion of 2, the temperature near the burner 112 of the combustion cylinder 111 becomes relatively high, so the radiant heat from the combustion cylinder lower part 111a causes the cylindrical body lower part 114a to become hotter than the cylindrical body upper part 114b. There is a problem that the distribution varies and the reforming efficiency of the steam reforming reaction that generates a reformed gas containing hydrogen deteriorates.

Accordingly, an object of the present invention is to provide a fuel cell reforming apparatus which solves the above-mentioned problems of the prior art, can be downsized, and can improve the reforming efficiency of a steam reforming reaction. It is in.

[0011]

According to the first aspect of the present invention,
A cylinder having a catalyst layer filled with a reforming catalyst and a combustor for supplying combustion gas into the cylinder are provided, and the temperature of the catalyst layer is increased by the combustion gas from the combustor. A fuel cell reformer for generating reformed gas by introducing fuel and water vapor to a catalyst layer, comprising a fuel supply pipe and a water supply pipe, wherein the water is introduced into a combustion gas passage for guiding combustion gas from the combustor. The supply pipe is introduced, the water flowing in the water supply pipe is converted into steam by the heat of the combustion gas, and the water supply pipe is led out from the combustion gas passage, connected to the fuel supply pipe, and connected to the fuel supply pipe. The fuel flowing through the pipe and the steam flowing through the water supply pipe are merged and guided to the catalyst layer.

According to the present invention, the water supply pipe is introduced into the combustion gas passage into which the combustion gas from the combustor is introduced, and the water flowing through the water supply pipe is converted into steam by the heat of the combustion gas. A separate steam generator for generating steam is not required, and the fuel cell reformer can be reduced in size.

According to a second aspect of the present invention, there is provided a cylinder having a catalyst layer filled with a reforming catalyst, and a combustor for supplying a combustion gas into the cylinder. In a reformer for a fuel cell, which raises the temperature of a catalyst layer and guides fuel and steam to the heated catalyst layer to generate a reformed gas, a fuel supply pipe and a water supply pipe are provided. A combustion cylinder for guiding combustion gas extends inside the cylinder,
The water supply pipe is introduced into the combustion cylinder, and the water flowing in the water supply pipe is converted into steam by the heat of the combustion gas. The water supply pipe is led out from the combustion gas passage, and the fuel supply pipe is And the fuel flowing through the fuel supply pipe and the water vapor flowing through the water supply pipe are combined and guided to the catalyst layer.

According to the present invention, the water supply pipe is introduced into the combustion tube, and the water flowing in the water supply pipe is converted into steam by the heat of the combustion gas. Therefore, the steam generator for generating steam is provided. Becomes unnecessary, and the size of the reformer for a fuel cell can be reduced.

According to a third aspect of the present invention, in the second aspect, the water supply pipe is in contact with an inner peripheral wall of the combustion cylinder.

According to the present invention, since the water supply pipe is in contact with the inner peripheral wall of the combustion cylinder, the combustion cylinder can be cooled.

According to a fourth aspect of the present invention, there is provided the fuel cell reforming apparatus according to any one of the first to third aspects, further comprising a reformed gas outlet pipe for leading the reformed gas to the outside of a cylinder. The reformed gas outlet pipe is brought into contact with a mixed gas of fuel and steam before being guided to the catalyst layer, and the mixed gas is preheated by the heat of the reformed gas and guided to the catalyst layer. It is a feature.

According to the present invention, since the mixed gas before being led to the catalyst layer is preheated by the heat of the reformed gas and led to the catalyst layer, the thermal efficiency can be improved.

According to a fifth aspect of the present invention, in accordance with any one of the first to third aspects of the present invention, there is provided a reformed gas outlet pipe for introducing the reformed gas to the outside of the cylindrical body. A structure in which a pipe is spirally wound and brought into contact with a mixed gas of fuel and steam before being led to the catalyst layer, and the mixed gas is preheated by the heat of the reformed gas and led to the catalyst layer. It is a feature.

According to the present invention, the reformed gas outlet pipe is spirally wound and brought into contact with a mixed gas of fuel and steam before being guided to the catalyst layer, and this mixed gas is heated by the heat of the reformed gas. As a result, the preheating is conducted to the catalyst layer, so that the thermal efficiency can be improved.

According to a sixth aspect of the present invention, in the invention according to any one of the first to third aspects, a reformed gas outlet pipe for leading the reformed gas to the outside of the cylinder is provided. A heat exchange chamber into which the combustion gas after heating the catalyst layer is led is formed, and the reformed gas outlet pipe and the fuel / steam mixed gas inlet pipe are led into this heat exchange chamber. The mixed gas introduction pipe is wound in a double spiral structure, and the mixed gas in the mixed gas introduction pipe is preheated by the heat of the reformed gas in the reformed gas outlet pipe and the heat of the combustion gas guided to the heat exchange chamber. And leading to the catalyst layer.

According to the present invention, the reformed gas outlet pipe and the mixed gas inlet pipe are wound in a double spiral structure in the heat exchange chamber into which the combustion gas is introduced, and the mixed gas in the mixed gas inlet pipe is led out of the reformed gas outlet. The heat of the reformed gas in the pipe and the heat of the combustion gas guided to the heat exchange chamber are preheated and guided to the catalyst layer, and the mixed gas is preheated from both the combustion gas and the reformed gas, thereby improving the heat efficiency. be able to.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference symbol S indicates a fuel cell power generation system. In this fuel cell power generation system S, hydrogen is generated from a fuel gas such as natural gas, city gas, and naphtha, and the generated hydrogen and air Is chemically reacted with oxygen to generate power. This fuel cell power generation system S
Desulfurization device 1 connected to pipe 11 to which fuel gas is supplied
A reformer (reformer for a fuel cell) 2 connected to the desulfurizer 1 via a pipe 12, and a carbon monoxide converter 3 connected to the reformer 2 via a pipe 13. A carbon monoxide removing device 4 connected to the carbon monoxide converting device 3 via a pipe 14, and a polymer electrolyte fuel cell body 5 connected to the carbon monoxide removing device 4 via a pipe 15. And a water tank 6 connected to the fuel cell main body 5 via a going water pipe 16a and a returning water pipe 16b.
The fuel cell body 5 includes a fuel electrode (anode) 5a, an air electrode (cathode) 5b, and a cooling unit 5c.

When the operation is started, the fuel gas is supplied to the pipe 11.
The sulfur component is removed from the fuel gas by the desulfurization device 1 through the desulfurization device 1. The desulfurized fuel gas is sent to the reformer 2 through the pipe 12, and water is supplied to the reformer 2. In the reformer 2, the supplied water is vaporized to generate steam, and a reformed gas containing hydrogen and carbon monoxide is generated from the steam and the fuel gas by a steam reforming reaction. The generated reformed gas is sent to the carbon monoxide converter 3 through the pipe 13, where the carbon monoxide contained in the reformed gas is steam reformed and converted into carbon dioxide, The carbon monoxide concentration of the reformed gas is reduced to about 1%. Air is mixed into the reformed gas and sent to the carbon monoxide removing device 4 through the pipe 14. In the carbon monoxide removing device 4, carbon monoxide contained in the reformed gas mixed with air is converted into carbon dioxide by a selective oxidation reaction, and the carbon monoxide concentration of the reformed gas is reduced to about 10 ppm. This reformed gas is sent to the fuel electrode 5a of the fuel cell main body 5 through the pipe 15, and in the fuel cell main body 5, hydrogen in the reformed gas introduced to the fuel electrode 5a and oxygen in the air introduced to the air electrode 5b. And an electrochemical reaction is performed to generate electric power. This fuel cell body 5
Is an exothermic reaction, the water in the water tank 6 is sent to the cooling unit 5c through the water pipe 16a to cool the fuel cell main body 5, and the water heated by the cooling is heated through the return water pipe 16b. Return to 6.

In FIG. 2, reference numeral 20 denotes the reformer 2
The reformer body 20 includes a cylindrical body 21
And a combustion cylinder 22 extending inside the cylindrical body 21.

A blower 23 is attached to the combustion tube 22, and a burner (combustor) 24 to which air is supplied from the blower 23 is built in an end of the combustion tube 22. Combustion cylinder 2
Inside 2, a combustion gas passage 25a for guiding the combustion gas from the burner 24 is formed. A fuel gas supply pipe 26 for combustion is connected to the burner 24 to supply fuel gas for combustion. An unreacted gas pipe 27 for a fuel cell is connected to the burner 24 to generate electricity at the fuel electrode 5a (FIG. 1). A fuel cell unreacted gas containing unused hydrogen is supplied.

The cylindrical body 21 has a quadruple cylindrical wall structure, and includes a first cylindrical wall 31, a second cylindrical wall 32, and a third cylindrical wall 3 from the inside.
3 and a fourth cylindrical wall 34. A combustion gas passage 25b communicating with the combustion gas passage 25a is formed between the combustion cylinder 22 and the first cylinder wall 31, and a combustion gas is formed between the third cylinder wall 33 and the fourth cylinder wall 34. A combustion gas passage 25c communicating with the gas passage 25b is formed. Reference numeral 35 denotes a combustion gas discharge pipe communicating with the combustion gas passage 25c.

In this embodiment, the reformer 2 includes a fuel supply pipe 39 for supplying fuel gas and a water supply pipe 4 for supplying water.
0.

The water supply pipe 40 is introduced into the center of a combustion gas passage 25a in the combustion tube 22.
Extends upward along the center of the cylinder, is guided to the inner peripheral wall of the combustion cylinder 22, is spirally wound in contact with the inner peripheral wall 21a, and becomes a steam supply pipe 41 from the combustion cylinder 22 to become the combustion cylinder 22. Derived outside. The derived steam supply pipe 41 is connected to the fuel supply pipe 39 to form a mixed gas introduction pipe 42, and the mixed gas introduction pipe 42 is connected to a top plate 43 of the combustion cylinder 22. Between the first cylindrical wall 31 and the second cylindrical wall 32 of the cylindrical body 21, a mixed gas chamber 44 communicating with the mixed gas introducing pipe 42, an upper porous partition plate (for example, punching metal) 45, and a lower porous partition plate ( For example, a catalyst layer 47 partitioned by a punching metal 46 is formed. This catalyst layer 47 is filled with a reforming catalyst. A reformed gas passage 48 communicating with the catalyst layer 47 is formed between the second cylinder wall 32 and the third cylinder wall 33. Reference numeral 48 indicates a reformed gas outlet pipe.

Next, the operation will be described.

When combustion is taking place in the burner 24,
The combustion gas generated by this combustion moves in the direction of the dotted arrow. That is, the combustion gas is guided to the combustion gas passage 25a to heat the water supply pipe 40 inside the combustion tube 22, and is guided to the combustion gas passage 25b to heat the catalyst layer 47, and is guided to the combustion gas passage 25c. To heat the mixed gas in the mixed gas passage 48 and move the flue gas pipe 35 to 300 to 500
The temperature drops to ° C and is led to the outside.

On the other hand, water is supplied through the water supply pipe 40, and this water is vaporized by the combustion gas in the combustion gas passage 25a in the water supply pipe 40 inside the combustion tube 22 and converted into steam. At this time, since the water supply pipe 40 inside the combustion tube 22 is spirally wound, the contact area between the combustion gas and the water supply pipe 40 is large, and the water in the water supply pipe 40 is easily vaporized. I have. This steam is supplied to the steam supply pipe 41, and the steam of the steam supply pipe 41 and the fuel gas from the fuel supply pipe 39 merge to form a mixed gas. The mixed gas of the fuel gas and the steam is supplied to the reformer main body 20 through the mixed gas introduction pipe 42, and is introduced into the mixed gas chamber 44 of the reformer main body 20. In the mixed gas chamber 44, the mixed gas is preheated by the combustion gas, and the preheated mixed gas is guided to the catalyst layer 47 through the holes of the upper porous partition plate 45.
The temperature is raised to a reaction temperature of 800 ° C. and steam reformed,
It is converted to a reformed gas containing hydrogen and carbon monoxide. The temperature of the reformed gas after being converted to the reformed gas is 400 to
600 ° C. Then, the reformed gas passes through the reformed gas passage 4
9, the reformed gas outlet pipe 36 (pipe 1 in FIG. 1)
Through 3), for example, the carbon monoxide is sent to a carbon monoxide converter 3 for converting carbon monoxide into carbon dioxide.

According to the present embodiment, since water is vaporized by the heat of the combustion gas generated in the burner 24 of the reformer main body 20 to generate steam, it is necessary to separately provide a steam generator for generating steam. And the size of the reformer 2 can be reduced. In addition, a water supply pipe 4 for generating steam
0 is provided in the combustion tube 22, the water in the water supply pipe 40 absorbs radiant heat from the combustion tube lower portion 22a near the burner 24, and does not increase the temperature of the cylindrical lower portion 21a. 21 can be made uniform in temperature distribution. Also,
Since the water supply pipe 40 is in contact with the inner peripheral wall of the combustion tube 22, the combustion tube 22 can be cooled.

As another embodiment, as shown in FIG.
The reformed gas outlet pipe 51 for leading the reformed gas to the mixed gas chamber 44 of the cylindrical body 21 may be provided.

In this case, the heat of the reformed gas guided to the reformed gas outlet pipe 51 is supplied to the mixed gas in the mixed gas chamber 44, and the mixed gas is preheated. Therefore, since the mixed gas is already preheated when introduced into the catalyst layer 47, the thermal efficiency is improved, and the combustion amount of the burner 24 can be reduced. The reformed gas outlet pipe 51
Is spirally wound in the mixed gas chamber 44, the effect of preheating the mixed gas can be improved.

As still another embodiment, as shown in FIG. 4, a reformed gas outlet pipe 52 for leading a reformed gas into a mixed gas chamber 44 of a cylindrical body 21 is provided.
A heat exchange chamber 53 for introducing the combustion gas after heating the fuel gas 7 is formed, and the reformed gas outlet pipe 52 and the mixed gas introduction pipe 54 for introducing the fuel gas and the steam are introduced into the heat exchange chamber 53, and the reformed gas is introduced. The outlet pipe 52 and the mixed gas inlet pipe 54 may be wound in a double spiral structure. Reference numeral 55 denotes a combustion gas discharge pipe.

In this case, the heat of the combustion gas guided to the heat exchange chamber 53 and the heat of the reformed gas guided through the reformed gas outlet pipe 52 are supplied to the mixed gas in the mixed gas introduction pipe 54, and the mixed gas is supplied. After being preheated and preheated from the reformed gas passing through the reformed gas outlet pipe 52 in the mixed gas chamber 44, the mixed gas is guided to the catalyst layer 47. Therefore, since the mixed gas is preheated when introduced into the catalyst layer 47, the thermal efficiency is improved and the combustion amount of the burner 24 can be reduced. Further, since the heat exchange is performed by winding the reformed gas outlet pipe 52 and the mixed gas introduction pipe 54 in a double spiral structure, the heat exchange between the fuel gas and the reformed gas is efficiently performed, and the reforming is performed. The raw gas outlet pipe 52 and the mixed gas inlet pipe 54 can be easily arranged in the heat exchange chamber 53. Further, since the heat exchange chamber 53 is formed in the cylindrical body 21, the heat exchange chamber 53 does not extremely increase the size of the entire reformer.

Although the present invention has been described based on the embodiments, it is apparent that the present invention is not limited thereto.

[0040]

According to the first aspect of the present invention, the water supply pipe is introduced into the combustion gas passage through which the combustion gas from the combustor is introduced, and the water flowing through the water supply pipe is heated by the heat of the combustion gas. Since the steam is converted into steam, a separate steam generator for generating steam is not required, and the size of the reformer for a fuel cell can be reduced.

According to the second aspect of the present invention, the water supply pipe is introduced into the combustion cylinder, and the water flowing in the water supply pipe is converted into steam by the heat of the combustion gas, so that the steam is generated. This eliminates the need for a steam generator, and can reduce the size of the fuel cell reformer.

According to the third aspect of the present invention, since the water supply pipe is in contact with the inner peripheral wall of the combustion cylinder, the combustion cylinder can be cooled.

According to the fourth aspect of the present invention, the mixed gas before being led to the catalyst layer is preheated by the heat of the reformed gas and led to the catalyst layer, so that the thermal efficiency can be improved.

According to the fifth aspect of the present invention, the reformed gas outlet pipe is spirally wound and brought into contact with a mixed gas of fuel and steam before being led to the catalyst layer, and this mixed gas is subjected to the reforming. Since it is preheated by the heat of the raw gas and guided to the catalyst layer, the thermal efficiency can be improved.

According to the sixth aspect of the present invention, the reformed gas outlet pipe and the mixed gas introduction pipe are wound in a double spiral structure in the heat exchange chamber into which the combustion gas is introduced, and the mixed gas in the mixed gas introduction pipe is discharged. Since the heat of the reformed gas in the reformed gas outlet pipe and the heat of the combustion gas led to the heat exchange chamber are preheated and guided to the catalyst layer, and the mixed gas is preheated from both the combustion gas and the reformed gas, Thermal efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a fuel cell power generation system.

FIG. 2 is a sectional view showing the reforming apparatus according to the present embodiment.

FIG. 3 is a sectional view showing a reformer according to another embodiment.

FIG. 4 is a sectional view showing a reformer according to still another embodiment.

FIG. 5 is a sectional view showing a conventional reformer.

[Explanation of symbols]

 2 Reformer (reformer for fuel cell) 20 Reformer main body 21 Cylindrical body (cylindrical body) 24 Burner 25a Combustion gas passage 39 Fuel supply pipe 40 Water supply pipe 47 Catalyst layer 51 Reformed gas outlet pipe 52 Reformer Gas outlet pipe 53 Heat exchange chamber 54 Mixed gas inlet pipe

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Taketoshi Koki 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Osamu Tajima 2-chome Keihanhondori, Moriguchi-shi, Osaka No.5-5 Sanyo Electric Co., Ltd. F term (reference) 4G040 EA03 EA06 EB03 EB12 EB23 EB44 5H027 AA02 BA01 BA09 BA16 BA17 CC06

Claims (6)

[Claims] 1. A cylinder having a catalyst layer filled with a reforming catalyst, and a combustor for supplying combustion gas into the cylinder, wherein the temperature of the catalyst layer is increased by the combustion gas from the combustor. A fuel cell reformer for generating reformed gas by introducing fuel and steam to the heated catalyst layer, comprising: a fuel supply pipe and a water supply pipe; and a combustion gas for guiding combustion gas from the combustor. The water supply pipe is introduced into the passage, and the water flowing in the water supply pipe is converted into steam by the heat of the combustion gas. The water supply pipe is led out of the combustion gas passage and connected to the fuel supply pipe. The fuel flowing through the fuel supply pipe and the steam flowing through the water supply pipe are merged and guided to the catalyst layer. 2. A cylinder having a catalyst layer filled with a reforming catalyst, and a combustor for supplying a combustion gas into the cylinder, wherein the temperature of the catalyst layer is raised by the combustion gas from the combustor. A reformer for a fuel cell that generates a reformed gas by introducing fuel and water vapor to the heated catalyst layer, comprising: a fuel supply pipe and a water supply pipe; and a combustion cylinder that guides combustion gas from the combustor. Extending inside the cylinder, introducing the water supply pipe into the combustion cylinder,
The water flowing through the water supply pipe is converted into steam by the heat of the combustion gas, and the water supply pipe is led out of the combustion gas passage, connected to the fuel supply pipe, and the fuel flowing through the fuel supply pipe is provided. A reformer for a fuel cell, wherein water vapor flowing in a water supply pipe is combined and guided to the catalyst layer. 3. The reformer for a fuel cell according to claim 2, wherein the water supply pipe is in contact with an inner peripheral wall of the combustion cylinder. 4. A reformed gas outlet pipe for introducing the reformed gas to the outside of the cylinder, the reformed gas outlet pipe being brought into contact with a mixed gas of fuel and steam before being led to the catalyst layer, 4. The fuel cell reforming apparatus according to claim 1, wherein the mixed gas is preheated by the heat of the reformed gas and guided to the catalyst layer. 5. A reformed gas outlet pipe for introducing the reformed gas to the outside of the cylinder, wherein the reformed gas outlet pipe is spirally wound to mix fuel and steam before being guided to the catalyst layer. The reformer for a fuel cell according to any one of claims 1 to 3, wherein the mixed gas is brought into contact with a gas, and the mixed gas is preheated by the heat of the reformed gas and led to the catalyst layer. . 6. A heat exchange chamber, wherein a reformed gas outlet pipe for introducing the reformed gas to the outside of the cylinder is formed, and a heat exchange chamber into which the combustion gas after heating the catalyst layer is formed is formed in the cylinder. Guide the reformed gas outlet pipe and the fuel / steam mixed gas inlet pipe to the exchange chamber, wind the reformed gas outlet pipe and the mixed gas inlet pipe into a double spiral structure, and mix the mixed gas in the mixed gas inlet pipe. 4. The apparatus according to any one of claims 1 to 3, wherein the heat is preheated by the heat of the reformed gas in the reformed gas outlet pipe and the heat of the combustion gas guided to the heat exchange chamber and guided to the catalyst layer. Or 1
13. The reformer for a fuel cell according to item 13.