JPH0747263A - Pressurized plate reformer - Google Patents

Abstract

PURPOSE:To manufacture a pressurized plate reformer without the necessity to control a differential pressure in a reformer and a container and also without the necessity to weld the entire periphery of adjacent plates. CONSTITUTION:Plate reformer units, each consisting of a plate reforming chamber, a combustion chamber and a fuel or air dispersion chamber stacked, are piled up in stages. The plate reformer is equipped with a header 8 for supplying a row material gas for reforming to the reforming chamber, a header 9 for supplying air or fuel to the combustion chamber, a header 10 for supplying fuel or air to the dispersion chamber, a header 11 for discharging the reforming gas from the reforming chamber, and a header 12 for discharging a combustion exhaust gas from the combustion chamber. A cover plate 14 is installed all over the surface excepting those of headers 8, 9, 10, 11 and 12 to make the plate reformer pressure-resistant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure type plate replenisher used for producing a product gas from a supplied fuel such as a case of producing a fuel gas to be supplied to an anode (fuel electrode) side of a fuel cell in a fuel cell power generation system. It is about the former.

[0002]

2. Description of the Related Art Among reformers that reform a feed fuel into a product gas by reacting a catalyst, a plate reformer is compact and capable of performing uniform combustion in the entire combustion chamber and performing reforming effectively. It has been used conventionally.

FIG. 3 shows a conventional plate reformer.
This is an example of a fuel dispersion type, in which a plate-type reforming chamber 2 filled with a reforming catalyst 1 and a plate-type combustion chamber 4 filled with a combustion catalyst 3 are stacked via a heat transfer partition wall 5. At the same time, a plate-type fuel dispersion chamber 7 is laminated on the combustion chamber 4 via a fuel distribution plate 6 having a large number of dispersion holes. Air A is supplied to the combustion chamber 4 and the fuel dispersion chamber 7 When a fuel F is supplied to the reforming chamber 2 and a reforming raw material gas NG such as natural gas is supplied to the reforming chamber 2, the fuel F enters the combustion chamber 4 through the dispersion holes of the fuel distribution plate 6, where A is burned by A to burn uniformly in the entire combustion chamber 4, and the heat generated by the combustion in the combustion chamber 4 is absorbed into the reforming chamber 2 side through the heat transfer partition wall 5 and reformed. In the chamber 2, the reforming raw material gas NG is absorbed by the reforming catalyst 1 in the reforming chamber 2.
Reacted by In this case, when the reforming raw material gas NG is natural gas (CH ₄ + H ₂ O), the reaction of CH ₄ + H ₂ O → CO + 3H ₂ CO + H ₂ O → CO ₂ + H ₂ is performed, and CH ₄ + H ₂ O Can be reformed into H ₂ and CO ₂ (Actual Kaihei 1-5254).
No. 1).

The plate reformer includes a fuel dispersion chamber 7
Since the fuel F supplied to the combustion chamber 4 is dispersed through the dispersion holes of the fuel dispersion plate 6 and enters the combustion chamber 4, and the distributed combustion is performed in the combustion chamber 4, a uniform temperature distribution is obtained in the combustion chamber 4. Thus, the endothermic reaction in the reforming chamber 2 can be efficiently performed, and at this time, the temperature distribution can be controlled by appropriately selecting the distribution of distribution holes and the hole diameter of the fuel distribution plate 6. In addition, the combustion temperature can be adjusted.

In the plate reformer constructed as described above, when a pressurizing type plate reformer is manufactured, since each chamber such as the reforming chamber 2 and the combustion chamber 4 has a flat plate structure, reliability of pressure resistance can be obtained. It must be placed in a pressure vessel as it is not present. When the plate reformer is put in a pressure container to manufacture a pressure mold, the plate reformers are stacked in a plurality of units as one unit and housed in the container.

However, when the plate reformer is put in a pressure vessel to be a pressure type, it is necessary to control the differential pressure between the reformer and the vessel, and when the pressure vessel is a cylindrical vessel, a square type is used. When the plate reformer is housed in the cylindrical container, there is a problem that the dead space becomes too large and the feature of compactness of the plate reformer disappears.

Therefore, conventionally, as shown in FIG. 4, on one side of a plate reformer composed of a reforming chamber, a combustion chamber, and a fuel dispersion chamber, which are stacked as one unit, the reforming raw material gas and air are provided for each unit. , Headers 8, 9 and 10 for supplying fuel respectively are provided, and headers 11 and 12 for discharging reformed gas and combustion exhaust gas are provided on the other side, and further, between the units in the peripheral portion. The dispersion chamber is welded over the entire circumference along the welding line 13 so that the airtightness is maintained.

[0008]

However, in the conventional pressure plate reformer as shown in FIG. 4, since it is necessary to weld the dispersion chamber between the units along the welding line 13 over the entire circumference, it is often used for manufacturing. It took a lot of trouble,
The present invention is intended to provide a pressure plate reformer that can be manufactured without welding the dispersion chamber between units over the entire circumference.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a plate type reforming chamber in which a reforming source gas is used as a reforming gas, and a plate type combustion chamber sandwiching a heat transfer partition. And a plate reformer unit in which a plate-type fuel or air dispersion chamber is arranged with a fuel or air dispersion plate interposed in the combustion chamber. A header for supplying a raw material gas, a header for supplying air or fuel to the combustion chamber, a header for supplying fuel or air to the dispersion chamber, a header for discharging the reformed gas from the reforming chamber, and a combustion chamber A header for discharging combustion exhaust gas from the above is attached to the side wall, and a cover plate having a large thickness is attached to the entire peripheral surface excluding the above headers to form a pressure resistant type.

[0010]

Since the periphery of the plates of the plate reformer is closed by the cover plate, the reformer itself is made into a pressure-resistant rectangular container, so that it is not necessary to weld the units together over the entire circumference. Therefore, the side wall of the dispersion chamber of each unit can be removed, and not only the welding process but also the material can be reduced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention, which is a fuel dispersion type in which fuel is dispersed in a combustion chamber, and reformed gas and combustion exhaust gas are made to flow in parallel. I will show you about things.

Air A is introduced into both the upper and lower sides of the reforming chamber 2 which is designed to introduce the reforming raw material gas NG from one end side and to discharge the reforming gas RG from the other end side to supply the fuel. Combustion chambers 4 configured to burn and discharge combustion exhaust gas G are disposed with heat transfer partition walls 5 sandwiched therebetween, and fuel dispersion chambers 7 are disposed with fuel dispersion plates 6 sandwiched between each combustion chamber 4. One unit is a plate reformer in which the fuel F supplied to 7 is put in the combustion chamber 4 and burned, and each unit is laminated in a plurality of stages, and the reformer chamber 2 of each stage is modified on one side. A header 8 for supplying the raw material gas NG, a header 9 for supplying the air A to the combustion chamber 4, and a header 10 for supplying the fuel F to the fuel dispersion chamber 7 are attached, and on the opposite side, reforming of each stage is performed. The header 11 for discharging the reformed gas RG from the chamber 2 and the combustion chamber Attaching a header 12 for discharging the combustion exhaust gas G from. Furthermore, the headers 8, 9, 10 on one side of the stacked plate reformer unit group
Where is not located and on the opposite side of the header 11,
A cover plate 14 made of a thick plate is attached to the entire side surface including the place where 12 is not located and to both upper and lower surfaces to make a pressure resistant type.

If a thick cover plate 14 is attached to the entire surface to provide a pressure type, the problem of dead space and the need for differential pressure control when installed in a cylindrical pressure vessel similar to the case shown in FIG. In addition, the welding of the units performed in the case shown in FIG. 4 can be omitted, and the pressure type plate reformer can be easily and reliably pressure-resistant.

In the above embodiment, the fuel dispersion type plate reformer is of the pressurizing type.
The header 9 is for supplying fuel, and
The header 10 may be a so-called air dispersion type in which air is dispersed in the combustion chamber by supplying the air to the combustion chamber, and a header 11 for discharging reformed gas and a header 12 for discharging combustion exhaust gas are provided on the same side surface. Although the case where the reformed gas and the combustion exhaust gas flow in parallel has been shown above, the headers 11 and 12 may be placed on opposite sides so that both gases may flow in opposite directions, and other points of the present invention will be described. Of course, various changes can be made without departing from the scope.

[0016]

As described above, according to the pressurizing plate reformer of the present invention, a plate-type combustion chamber is arranged in a plate-type reforming chamber with a heat transfer partition interposed therebetween, and fuel or fuel is placed in the combustion chamber. A fuel or air dispersion chamber is arranged with an air dispersion plate sandwiched in between, and the fuel or air is dispersed from the dispersion chamber to the combustion chamber and burned with respect to the air or fuel supplied to the combustion chamber, and the heat generated by the combustion is generated. A plate reformer, which is configured to heat-reform the reforming raw material gas to reform the reformed gas by transferring heat to the reforming chamber, is stacked in a plurality of stages as one unit, and the reforming chamber, combustion chamber, and dispersion of each unit are arranged on the side surface. Attach the header that leads to each room,
Since a thick cover plate is attached to the entire surface avoiding each of these headers to close it and make it a pressure resistant type, it is necessary to install it in a cylindrical container and pressurize it. In addition to omitting the differential pressure control, it is also possible to omit welding the units around the entire circumference, and it is also possible to remove the side wall of the dispersion chamber and reduce the material.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a pressure plate reformer of the present invention.

FIG. 2 is a schematic sectional view of a pressure plate reformer of the present invention.

FIG. 3 is a schematic diagram showing an example of a plate reformer.

FIG. 4 is a perspective view showing an example of a conventional pressure plate reformer.

[Explanation of symbols]

 2 reforming chamber 4 combustion chamber 5 heat transfer partition wall 6 fuel dispersion plate 7 fuel dispersion chamber 8, 9, 10, 11, 12 header 14 cover plate NG reforming raw material gas A air F fuel RG reformed gas G combustion exhaust gas

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sakae Chiyoiwa 3-15-1, Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Toni Technical Center

Claims (1)

[Claims] 1. A plate-type reforming chamber for reforming a reforming raw material gas into a reforming gas, wherein plate-type combustion chambers are arranged with a heat transfer partition interposed therebetween, and fuel or air is dispersed in the combustion chamber. The plate reformer unit in which the plate type fuel or air dispersion chambers are arranged with the plates sandwiched is stacked in multiple stages, and the header for supplying the reforming source gas to the reforming chamber for each unit and the reformed gas A header for discharging, a header for supplying air or fuel to the combustion chamber, a header for discharging combustion exhaust gas, and a header for supplying fuel or air to the dispersion chamber are attached to the side surface, and further, on the entire surface excluding the above headers. A pressure type plate reformer characterized by being enclosed by a cover plate.