JP2003221207A - Fuel reforming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a system part from overheating by preventing heat of a fuel reforming device from being transferred to the system part such as the controlling part. <P>SOLUTION: The fuel reforming device provided with a fuel reforming main body comprising a reforming part 2 in which reformed gas is produced by a flame formed by a burner 1 using natural gas as an example to be reformed and discharged therefrom, wherein a shielding wall member 9 shielding heat radiation from an outer wall of reforming device is remotely formed surrounding the fuel reforming main body 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel reformer equipped with a fuel reformer main body including a reformer for generating and discharging reformed gas by utilizing a reforming raw material. The present invention relates to a fuel reformer that includes a shield wall member that is formed so as to surround the main body of the device and that shields radiant heat radiated from the outer wall of the reformer.

[0002]

2. Description of the Related Art A conventional fuel cell power generator (see JP-A-7-3
35236) is a device in which a reformer main body H, a fuel cell B, a control unit, and other equipment and system components are arranged in a housing P as a package, as shown in FIG. And the system parts were arranged separately so that they could be easily maintained.

[0003]

In the conventional fuel cell power generator described above, the reformer main body H is provided in the package P.
Since there is nothing to block only the space between other devices and the system parts, the heat of the reformer main body H is transferred to the system parts such as the control unit by heat radiation or heat conduction, so that those system parts are overheated. There was a problem.

Therefore, the inventor of the present invention has proposed a fuel reformer main body including a fuel reformer main body including a reforming section for producing and discharging a reformed gas by utilizing a reforming raw material. The shielding wall member formed so as to surround the above is focused on the first technical idea of the present invention that shields radiant heat radiated from the outer wall of the reformer, and penetrates the shielding wall member. The heat transfer block formed in a part of the fixing member that extends and forms the fuel reformer main body to the frame of the package transfers the heat of the fuel reformer main body to the frame. As a result of further research and development, the heat of the reformer body is prevented from being transferred to the system parts such as the control unit and the overheating of the system parts is prevented. Achieve the goal of prevention That it was arrived at the present invention.

[0005]

The fuel reforming apparatus of the present invention (the first invention according to claim 1) comprises a reforming section for producing and discharging a reformed gas using a reforming raw material. A fuel reformer including a fuel reformer main body is provided with a shield wall member extending and formed so as to surround the fuel reformer main body and shielding radiant heat radiated from an outer wall of the reformer. There is something.

In the fuel reformer of the present invention (the second invention according to claim 2), in the first invention, the shielding wall member surrounds at least a high temperature portion of the fuel reformer main body. It is a thing.

In the fuel reformer of the present invention (the third invention according to claim 3), in the first invention, the shielding wall member surrounds substantially the entire body of the fuel reformer. Is.

In the fuel reformer of the present invention (the fourth invention according to claim 4), in the second invention, the fuel reformer is formed so as to extend through the shielding wall member, and is one of the main bodies of the fuel reformer. Heat transfer prevention for preventing heat of the fuel reformer main body from being transferred to a part of a fixing member whose one end is fixed to the part and whose other end is fixed to a part of the frame of the package. Part is formed.

In the fuel reforming apparatus of the present invention (the fifth invention according to claim 5), in the fourth invention, the heat transfer inhibiting portion cools the part of the fixing member by a refrigerant. It is composed of.

The fuel reformer of the present invention (sixth invention according to claim 6) is the fuel reformer according to the fifth invention, wherein:
It is configured by a refrigerant passage through which a refrigerant is supplied.

In the fuel reformer of the present invention (the seventh invention according to claim 7), in the sixth invention, a refrigerant pipe for supplying a refrigerant is provided in a part of the shielding wall member. A part of the shielding wall member is cooled by the refrigerant supplied to the refrigerant pipe.

The fuel reformer of the present invention (the eighth invention according to claim 8) is the fuel reformer according to the sixth invention or the seventh invention,
The refrigerant supplied to the refrigerant passage is any one or more of circulating water for collecting hot water, burner air, fuel cell air, stack cooling water, reforming raw material gas, and selective oxidation air. is there.

[0013]

The fuel reformer of the first aspect of the present invention having the above-described structure is provided with the fuel reformer main body including the reformer for generating and discharging the reformed gas using the reforming raw material. In the fuel reformer, the shielding wall member extended so as to surround the fuel reformer main body shields radiant heat radiated from the outer wall of the reformer, so that the heat of the reformer main body is reduced. It is possible to prevent the heat from being transmitted to the system parts such as the control unit and prevent the system parts from being overheated.

In the fuel reformer of the second invention having the above structure, in the first invention, since the shielding wall member surrounds at least a high temperature portion of the fuel reformer main body, the reformer is provided. The effect of effectively preventing the heat of the main body from being transmitted to system components such as the control unit is exerted.

In the fuel reformer of the third invention having the above structure, in the first invention, since the shielding wall member surrounds substantially the whole of the fuel reformer main body, the reformer main body. The effect of effectively preventing the heat from being transmitted to system components such as the control unit is achieved.

In the fuel reformer of the fourth aspect of the invention having the above structure, in the second aspect of the invention, the fuel reformer is formed to extend through the shielding wall member, and one end of which is fixed to a part of the fuel reformer body. At the same time, the heat of the fuel reformer main body is transferred to the frame by the heat transfer blocking portion formed on a part of the fixing member whose other end is fixed to a part of the frame of the package. Therefore, there is an effect that heat transfer from the fuel reformer main body to the frame of the package is blocked.

In the fuel reformer of the fifth aspect of the invention having the above-mentioned configuration, in the fourth aspect of the invention, the cooling section constituting the heat transfer inhibiting section cools the part of the fixing member with a refrigerant, The effect of blocking heat transfer from the fuel reformer main body to the frame of the package is exerted.

In the fuel reformer of the sixth invention having the above structure, in the fifth invention, the refrigerant passage forming the cooling unit cools the part of the fixing member by the supplied refrigerant. The effect of effectively blocking heat transfer from the fuel reformer main body to the frame of the package is obtained.

In the fuel reforming apparatus of the seventh invention having the above structure, in the sixth invention, the refrigerant pipe for supplying the refrigerant is arranged in a part of the shielding wall member to supply the refrigerant to the refrigerant pipe. Since a part of the shielding wall member is cooled by the generated cooling medium, the temperature of the shielding wall member can be lowered.

In the fuel reforming apparatus of the eighth invention having the above structure, in the sixth or seventh invention, the refrigerant supplied to the refrigerant passage is circulating water for collecting hot water, air for burner, fuel cell. Since at least one of the cooling air, stack cooling water, reforming raw material gas, and selective oxidation air is used, the heat from the fuel reforming apparatus main body to the frame of the package depends on the temperature of the refrigerant used. It has the effect of blocking transmission.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The embodiments of the present invention will be described below.
This will be described with reference to the drawings.

(First Embodiment) The fuel reforming apparatus of the first embodiment uses natural gas as an example of a reforming raw material by the flame formed by the burner 1 as shown in FIGS. 1 to 4. Reforming part 2 for generating and discharging reformed gas
In a fuel reformer including a fuel reformer main body, the shield wall member is formed to extend so as to surround the fuel reformer main body 10 and shield radiant heat radiated from the outer wall of the reformer. It is equipped with 9.

The fuel reformer main body 10 according to the first embodiment is applied to a natural gas fuel cell system.
As shown in FIG. 1 showing its outline, natural gas (13
A) which utilizes A), and a burner combustion part 1 in which a flame is formed, and a heat insulating material 1 which comprises a ruthenium catalyst and which directly supplies the reformed gas from the outlet to the high temperature side of the heat exchanger 4.
A reforming section 2 as a reformer surrounded by 2 and water vaporized by combustion exhaust gas to convert steam into the heat exchanger 4
To the reformer 2, a city gas as a reforming raw material through the heat exchanger 4, and a booster pump for supplying the reformed gas from the reforming portion 2 to the raw material gas and steam. It comprises a heat exchanger 4 for exchanging heat with the above, a CO shift section 5 made of a copper / zinc catalyst supplied with the reformed gas having undergone heat exchange, and a CO selective oxidation section 6 supplied with an oxidant.

The shielding wall member 9 is a system frame 90 having a U-shaped cross section as shown in FIGS.
Surrounding the burner combustion section 1, the reforming section 2, and the heat exchanger 4, and a rectangular opening is fixed to the lower portion of the rectangular plate member 91. A rectangular box upper shield member that surrounds the lower shield member 92 of the rectangular box body, the CO shift unit 5 and the CO selective oxidation unit 6, and has a rectangular opening fixed to the upper portion of the rectangular plate member 91. And 93.

One end 941 is fixed to the facing portions 901 and 902 of the system frame 90 having a U-shaped cross section, and the other stay 94 is inserted between the lower shield member 92 and the upper shield member 93. The fuel reformer body 1 is fixed to the end 942 by fixing the side wall at the lower end of the CO shift portion 5 fixed to the upper end of the heat exchanger 4.
0 is supported with respect to the frame 90.

In the fuel reforming apparatus of the first embodiment having the above-mentioned structure, the reforming section 2 for producing and discharging the reformed gas by using the reforming raw material by the flame formed by the burner 1 In the fuel reformer including the fuel reformer main body 10, the shield wall member 9 extending so as to surround the fuel reformer main body 10 is formed from the outer wall of the reformer main body 10. Since the radiant heat radiated is shielded, the heat of the reformer main body 10 is prevented from being transmitted to the system parts such as the control unit, and the system parts are prevented from being overheated.

Further, in the fuel reformer of the first embodiment, the burner 1 and the reformer 2 in which the lower shield member 92 of the shielding wall member 9 is the high temperature portion of the fuel reformer main body 10 are provided. The effect of effectively preventing the heat of the high temperature portion of the reforming apparatus main body 10 from being transmitted to system components such as a control unit is surrounded.

Further, the fuel reformer of the first embodiment is
The rectangular shield plate 91, the lower shield member 92, and the upper shield member 93 of the shielding wall member 9 are
Since the fuel reformer main body 10 is surrounded almost entirely, the heat of the reformer main body 10 is effectively prevented from being transferred to system parts such as a control unit.

That is, in the fuel reformer of the first embodiment, as shown in FIG. 5, a shield plate 91 constituting the shielding wall member 9, lower and upper shield members 92,
By enclosing the fuel reformer main body 10 by 93, the ambient temperature on the side of the CO shift unit 5 is lowered by about 10 ° C. regardless of the temperature of the gas discharged from the CO shift unit 5. Results were obtained.

(Second Embodiment) The fuel reforming apparatus of the second embodiment is the shielding wall member 9 in the first embodiment.
6 and 9, it is fixed to the CO shift portion 5 of the fuel reformer main body 10 and fixed to the parts 901 and 902 of the system frame 90 of the package. Part 9 of the secured fixing member 94
The heat of the fuel reformer main body 10 is applied to the frame 9
A heat transfer blocking portion 95 for blocking heat transfer to 0 is formed, and the fixing member 94 constitutes a so-called heat insulating flange.

The heat transfer blocking portion 95 is fixed to the system frame 90 via bolts.
In the first stay as the part 941 of 4, the cooling unit 951 is cooled by the cooling medium.

The first stay as the part 941 of the fixing member 94 is fixed to the upper end of the heat exchanger 4 of the fuel reformer main body 10 as shown in FIG.
The second stay as the other portion 942 of the fixing member 94 fixed to the lower end of the O shift portion 5 via a bolt is fixed via a bolt.

The cooling part 951 is provided with the part 9 of the fixing member 94 as shown in FIGS. 8 (A) and 8 (B).
Refrigerant passage 9 formed in the first stay 41
The refrigerant is introduced from the inlet on the side wall and discharged from the outlet on the upper wall.

The refrigerant supplied to the refrigerant passage 950 is one or more of circulating water for recovering hot water, burner air, fuel cell air, stack cooling water, reforming raw material gas, and selective oxidation air. Is used.

As shown in FIGS. 9A and 9B, the second stay as the other portion 942 of the fixing member 94 is longitudinally formed on the upper wall and the lower wall of the portion contacting the first stay. A plurality of notches 9421, 9422, 94 extending
23 is formed to reduce the contact area with the first stay and reduce the amount of heat transfer from the fuel reformer body 10.

The fuel reforming apparatus of the second embodiment having the above-mentioned structure is formed so as to extend through the shielding wall member 9.
The heat transfer blocking formed on a part 941 of the fixing member 94 having one end fixed to a part of the fuel reformer main body 10 and the other end fixed to a part of the system frame 90 of the package. Since the heat of the fuel reformer main body 10 is prevented from being transferred to the frame by the portion 95, it is possible to prevent heat transfer from the fuel reformer main body 10 to the frame 90 of the package. Play.

Further, in the fuel reforming apparatus of the second embodiment, the cooling section constituting the heat transfer blocking section 95 cools the part of the fixing member 94 with the refrigerant, so that the fuel reforming apparatus This has an effect of preventing heat transfer from the main body 10 to the frame 90 of the package.

Further, the fuel reformer of the second embodiment is
Since the refrigerant passage 950 that constitutes the cooling unit cools the part of the fixing member 94 by the supplied refrigerant, heat transfer from the fuel reformer main body to the frame of the package can be effectively and effectively performed. It has the effect of blocking.

Further, in the fuel reforming apparatus of the second embodiment, the refrigerant supplied to the refrigerant passage 950 includes circulating water for collecting hot water, burner air, fuel cell air, stack cooling water, and reforming raw material. Either gas or selective oxidation air 1
Since the above components are used, there is an effect that heat transfer from the fuel reformer main body to the frame 90 of the package is blocked according to the temperature of the refrigerant used.

That is, in the second embodiment, the refrigerant passage 950 forming the cooling unit cools the part of the fixing member 94 by the supplied refrigerant, so that the fuel reformer main body is connected to the cooling member passage 950. Since it effectively and uniformly blocks heat transfer to the frame of the package, FIG.
As shown in 0, the higher the temperature of the gas discharged from the CO shift section 5, the higher the effect of lowering the surface temperature of the frame 90.

The embodiments described above are merely examples for the purpose of explanation, and the present invention is not limited to them. Those skilled in the art will recognize from the claims, the detailed description of the invention and the description of the drawings. Modifications and additions can be made without departing from the technical idea of the present invention.

As shown in FIG. 11, a part of the shielding wall member 9 in the above-mentioned first and second embodiments, for example, a refrigerant pipe 97 for supplying a refrigerant to the upper wall of the shielding wall member 9. It is possible to adopt a mode in which a part of the shielding wall member 9 is cooled by the refrigerant supplied into the refrigerant pipe 97 by disposing the Since a part of the member 9 is cooled, there is an effect that the ambient temperature of the shielding wall member 9 and the outside thereof is lowered.

In the second embodiment, by inserting a heat insulating material into the plurality of cutouts 9421, 9422, 9423, further heat insulating effect can be expected, and
A heat insulating effect can be expected by using a washer or collar having a low heat transfer coefficient such as ceramic or resin so as to come into contact with the bolt used for fixing the first and second stays.

[Brief description of drawings]

FIG. 1 is an overall view showing an entire fuel reformer according to a first embodiment of the present invention.

FIG. 2 is a front view showing a shielding member in the fuel reforming apparatus of the first embodiment.

FIG. 3 is a cross-sectional view showing a shielding member in the fuel reforming apparatus of the first embodiment.

FIG. 4 is a perspective view showing a shielding member in the fuel reforming apparatus of the first embodiment.

FIG. 5 is a diagram showing the relationship between the temperature of the gas discharged from the CO shift unit and the ambient temperature on the side of the CO shift unit in the fuel reforming apparatus of the first embodiment.

FIG. 6 is a cross-sectional view of a main part showing a main part of a fuel reformer according to a second embodiment of the present invention.

FIG. 7 is an overall view showing the entire fuel reforming apparatus of the second embodiment.

FIG. 8 is a plan view and a front view showing a first stay in the fuel reforming apparatus of the second embodiment.

9A and 9B are a plan view and a front view showing a second stay in the fuel reforming apparatus of the second embodiment.

FIG. 10 shows CO in the fuel reformer of the second embodiment.
6 is a diagram showing the relationship between the temperature of the gas discharged from the shift unit and the surface temperature of the frame 90. FIG.

FIG. 11 is a perspective view showing a shielding member in a fuel reformer according to another embodiment of the present invention.

FIG. 12 is a perspective view showing a conventional fuel cell power generator.

[Explanation of symbols]

1 burner 2 reforming section 9 Shield wall member 10 Fuel reformer body

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koichi Kuwaba             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Shinki Hattori             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. F-term (reference) 4G040 EA03 EA06 EB12 EB31 EB32                       EB41 EB42 EB46                 5H026 AA06                 5H027 AA06 BA01 BA09 BA16 BA17

Claims (8)

[Claims] 1. A fuel reformer including a fuel reformer body including a reformer that generates and discharges reformed gas by using a reforming raw material, and surrounds the fuel reformer body. And a shield wall member that is formed to extend to the outer wall of the reformer and shields radiant heat emitted from the outer wall of the reformer. 2. The fuel reformer according to claim 1, wherein the shielding wall member surrounds at least a high temperature portion of the fuel reformer main body. 3. The fuel reformer according to claim 1, wherein the shielding wall member surrounds substantially the entire fuel reformer main body. 4. The fuel cell system according to claim 2, wherein the one end is fixed to a part of the fuel reformer main body and the other end is formed to a part of the frame of the package. The fuel reformer, wherein a heat transfer blocker that blocks heat of the fuel reformer main body from being transferred to the frame is formed in a part of the fixed fixing member. 5. The fuel reforming device according to claim 4, wherein the heat transfer blocking unit is configured by a cooling unit that cools the part of the fixing member with a refrigerant. 6. The fuel reformer according to claim 5, wherein the cooling unit is configured by a refrigerant passage to which a refrigerant is supplied. 7. The cooling pipe according to claim 6, wherein a refrigerant pipe to which a refrigerant is supplied is arranged in a part of the shielding wall member, so that a part of the shielding wall member is cooled by the refrigerant supplied to the refrigerant pipe. A fuel reformer characterized by: 8. The refrigerant according to claim 6 or 7, wherein the refrigerant supplied to the refrigerant passage is circulating water for collecting hot water, air for burner, air for fuel cell, stack cooling water, reforming raw material gas, and selection. A fuel reformer characterized by using any one or more of oxidizing air.