JPH05105406A - Plate type reformer - Google Patents

Abstract

PURPOSE:To accelerate reforming reaction and to improve reforming rate by raising the temp. of a reformed gas on an outlet of a reforming chamber to the max. CONSTITUTION:The plate type reforming chamber 2 packed with the reforming catalyst 7 is constituted. The plate type heating chamber 9 is laminated on the reforming chamber 2. The plate type combustion chamber 16 packed with the combustion catalyst 21 is laminated on the heating chamber 9. The fuel dispersing chamber 24 is laminated through the fuel dispersing plate 22 on the combustion chamber 16. The high temp. combustion gas CG discharged from the combustion chamber 16 is introduced by the manifold 29 to the inlet side of the combustion chamber 9. As the inlet side of the combustion chamber 9 is used as the outlet side of the reforming chamber 2, temp. of the reformed gas on the outlet of the reforming chamber 2 is keep at high temp. by the combustion gas CG introduced to the inlet side of the combustion chamber 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate of a reformer used for producing a fuel gas to be supplied to a fuel cell anode (fuel electrode) from a gas containing a hydrocarbon such as city gas in a fuel cell power generation system. It's about typed reformers.

[0002]

2. Description of the Related Art In recent years, a reformer for reacting a catalyst to reform a fuel into a product gas is a plate type reformer which can be made compact and can perform uniform reforming in the entire combustion chamber for effective reforming. Is proposed.

The plate-type reformers proposed so far are constructed by stacking a reforming chamber filled with a reforming catalyst and a combustion chamber filled with a combustion catalyst via a heat transfer partition plate to generate heat generated in the combustion chamber. The heat is transferred to the reforming chamber side through the heat transfer partition plate to heat the reforming raw material gas in the reforming chamber to cause the reforming reaction by the reforming catalyst. Air is supplied to the combustion chamber after mixing fuel and air at the inlet of the combustion chamber, or to supply air to the combustion chamber from the inlet and disperse fuel into the combustion chamber. There is a method in which fuel is introduced into the combustion chamber from the inlet and air is dispersed and supplied to the combustion chamber.

An example of a distributed combustion system in which the above fuel is dispersed through a large number of dispersion holes and supplied to the combustion chamber is shown in FIG. 7, in which the reforming chamber a filled with the reforming catalyst b is filled with the combustion catalyst d. A fuel distribution plate f having a large number of dispersion holes g on the outer side of the combustion chamber c.
A fuel dispersion chamber h is formed through the fuel dispersion chamber h, the fuel F supplied to the fuel dispersion chamber h is supplied into the combustion chamber c through a large number of dispersion holes g of the fuel dispersion plate f, and the air A introduced into the combustion chamber c is supplied. The fuel F is burnt by means of which the reforming raw material gas supplied to the reforming chamber a absorbs and reacts the heat generated by this burning, and methane CH ₄ is used as the reforming raw material gas for steam reforming. In this case, the reaction of CH ₄ + H ₂ O → CO + 3H ₂ CO + H ₂ O → CO ₂ + H ₂ is performed.

[0005]

However, in order to promote the reforming reaction in the reforming chamber a and improve the reforming rate, the temperature is maximized at the outlet of the reforming chamber a. However, in the plate-type reformer shown in FIG. 7, the gas flow in the reforming chamber a and the gas flow in the combustion chamber c are arranged to be parallel to each other. In order to raise the temperature of the reformed gas at the outlet of a, it is necessary to raise the temperature of the outlet of the combustion chamber c. However, when the fuel utilization rate of the fuel cell increases, it becomes difficult to raise the outlet temperature of the combustion chamber c, so it is necessary to maintain the temperature of the reformed gas at the outlet of the reforming chamber a at a high temperature. This makes it impossible to improve the reforming rate of the reforming chamber a.

[0006] Therefore, the present invention intends to maintain the temperature of the reformed gas at the outlet of the reforming chamber at a high temperature to promote the reforming reaction and improve the reforming rate. Is.

[0007]

In order to solve the above-mentioned problems, the present invention provides a plate-type reforming chamber filled with a reforming catalyst with a plate-type heating chamber for flowing high-temperature combustion gas. A plate type combustion chamber filled with a combustion catalyst is stacked in the heating chamber and a fuel dispersion chamber is stacked in the combustion chamber through a fuel dispersion plate, and the heating chamber and the reforming chamber are heated. The gas flow in the chamber is set to be a counter flow, and the inlet of the heating chamber and the outlet of the combustion chamber are connected by a manifold.

[0008]

Since the inlet of the heating chamber is on the outlet side of the reforming chamber, the hot combustion gas is discharged from the combustion chamber and enters the inlet of the heating chamber, so that the inlet of the heating chamber has the highest temperature. Therefore, the reformed gas temperature at the outlet of the reforming chamber can be kept high. As a result, the reforming reaction in the reforming chamber is promoted and the reforming rate can be improved.

[0009]

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

1 and 2 show an embodiment of the present invention, in which gas inlets 4 and outlets 5 are formed on one surface of a heat transfer partition plate 1 at diagonal positions as shown in FIG. 3 by notches. With one side as an inlet side and the other side as an outlet side, and a mask frame 3 in which a partition member 6 for preventing catalyst outflow and for gas passage is provided in parallel on both sides,
A reforming catalyst 7 is filled between the partitioning members 6 on both sides, and a heat transfer partition plate 8 is further stacked on the mask frame 3 to form a reforming chamber 2. The reforming chamber 2 is sandwiched between the heating chambers. 9 are laminated so that the heat in the heating chamber 9 can be transferred to the reforming chamber 2 via the heat transfer partition plates 1 and 8. As shown in FIG. 4, the heating chamber 9 forms a gas inlet 11 on the other side where the outlet 5 of the reforming chamber 2 is located, and
A mask frame 10 in which a gas outlet 12 is formed on one side where the reforming chamber 2 has an inlet 4 and partition members 14 for preventing outflow of a heat transfer promoting material (alumina ball) 13 and for passing gas are provided in parallel on both sides. Are superposed on the outer sides of the heat transfer partition plates 1 and 8 so that the gas flow in the heating chamber 9 and the gas flow in the reforming chamber 2 are countercurrent.

Plate members 15 are placed on the outer sides of the heating chambers 9, and the plate members 15 are placed on the outer sides of the plate members 15.
As shown in FIG. 5, similarly to the case of the reforming chamber 2, an air inlet 18 is formed on one side and a combustion gas outlet 19 is formed on the other side, and a partition member 20 for preventing catalyst outflow and for gas passage is provided. The mask frames 17 provided in parallel on both sides are overlapped with each other, and the combustion catalyst 21 is filled between the partition members 20 on both sides to form the combustion chambers 16, respectively. 23
6. A mask having a fuel dispersion plate 22 having the above-mentioned structure and having a partition member 27 formed parallel to both sides on the outside of the fuel distribution plate 22 as shown in FIG. The frame 25 is overlaid, and the plate member 28 is overlaid on the outer side thereof to form the fuel dispersion chamber 24.
4, the fuel F supplied from the inlet 26 is supplied into the combustion chamber 16 through the dispersion holes 23 of the fuel distribution plate 22. Outside the fuel dispersion chamber 24, the reforming chambers 2 are stacked with the heating chamber 9 interposed therebetween, and the reforming chambers 2 are stacked in the same manner to form a reformer having a required number of stages. Further, the reforming chambers 2 are stacked between the stacked reforming chambers 2. The exit 19 of the combustion chamber 16 located and the entrance 1 of each heating chamber 9
1 is communicated with the manifold 29, and the high temperature combustion gas CG is guided to the inlet 11 of the heating chamber 9 and the outlet 5 of the reforming chamber 2.
Allow the sides to be kept hot.

City gas TG and steam are supplied as reforming raw material gas from the inlet 4 to the reforming chamber 2, and the inlet 18 is fed to the combustion chamber 16.
When the air A is supplied from the fuel dispersion chamber 24 and the fuel F is supplied to the fuel dispersion chamber 24, the fuel F is supplied from the fuel dispersion chamber 24 to the fuel dispersion plate 22.
Is supplied to the combustion chamber 16 through and is burned by the air A. The combustion gas CG generated in the combustion chamber 16 is discharged from the outlet 19 of the combustion chamber 16 at a high temperature (about 800 ° C.), and then is guided to the inlet 11 of the heating chamber 9 by the manifold 29 so as to flow through the inside of the heating chamber 9. After passing, it is discharged to the outside. Since the heating chamber 9 is laminated in the reforming chamber 2 with the heat transfer partition plates 1 and 8 interposed therebetween, the heat of the high-temperature combustion gas CG passing through the heating chamber 9 is reformed through the heat transfer partition plates 1 and 8. The city gas TG in the reforming chamber 2 is heated by being transmitted to the chamber 2, and the reforming reaction is performed by the reforming catalyst 7. At this time, the high temperature combustion gas CG discharged from the combustion chamber 16 is guided to the inlet 11 side of the heating chamber 9 by the manifold 29, and the inlet 11 side of the heating chamber 9 is located at the outlet 5 side of the reforming chamber 2. Therefore, the reformed gas temperature on the outlet 5 side of the reforming chamber 2 can be maintained at the highest temperature, so that the reforming reaction in the reforming chamber 2 can be promoted and the reforming reaction can be promoted. It is possible to improve the rate.

In the above embodiment, the case where alumina balls are filled as the heat transfer promoting material 13 in each heating chamber 9 has been described, but a fin structure may be used, and within the range not departing from the gist of the present invention. Of course, various changes can be made.

[0014]

As described above, according to the plate-type reformer of the present invention, the plate-type reforming chamber filled with the reforming catalyst is arranged so that the heating chamber for flowing the combustion gas has a counter gas flow. The combustion chamber of the distributed combustion method is laminated on the outer side of the heating chamber, and such a constitution is sequentially laminated. The outlet of the combustion chamber and the inlet of the heating chamber are communicated with the manifold, and the outlet of the reforming chamber. Since the high temperature combustion gas is introduced to the inlet of the heater on the side, the outlet side of the reforming chamber can be kept at the highest temperature by the high temperature combustion gas introduced to the inlet of the heating chamber. , The reforming reaction is promoted,
The reforming rate can be improved, and moreover, when the combustion gas discharged from the combustion chamber is returned and used, it is passed through the heating chamber, making it compact, and the combustion chamber adopts the distributed combustion method. Therefore, it is possible to exert an excellent effect such that combustion control suitable for the reforming reaction can be performed by selecting the pore size and the number of the dispersion pores.

[Brief description of drawings]

FIG. 1 is a sectional view showing an outline of a plate-type reformer of the present invention.

FIG. 2 is an exploded perspective view of the plate-type reformer of the present invention.

FIG. 3 is a plan view of a reforming chamber.

FIG. 4 is a plan view of a heating chamber.

FIG. 5 is a plan view of a combustion chamber.

FIG. 6 is a plan view of a fuel dispersion chamber.

FIG. 7 is a schematic sectional view showing an example of a conventional plate-type reformer.

[Explanation of symbols]

 1 heat transfer partition plate 2 reforming chamber 4 gas inlet 5 gas outlet 7 reforming catalyst 8 heat transfer partition plate 9 heating chamber 11 combustion gas inlet 12 combustion gas outlet 16 combustion chamber 18 air inlet 19 combustion gas Outlet 21 Combustion catalyst 22 Fuel dispersion plate 24 Fuel dispersion chamber 29 Manifold

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[Procedure amendment]

[Submission date] March 6, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Front page continued (72) Inventor Minoru Mizusawa 3-15-15 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Toji Technical Center

Claims (1)

[Claims] 1. A plate-type reforming chamber filled with a reforming catalyst, a plate-type heating chamber through which a high-temperature combustion gas is flown, is stacked via a heat transfer partition plate, and the heating chamber is filled with a combustion catalyst. The plate-shaped combustion chambers are stacked, and the fuel dispersion chambers are stacked in the combustion chambers through the fuel dispersion plate so that the gas flows of the reforming chamber and the heating chamber are opposed to each other. A plate-type reformer having a structure in which an inlet of the engine and an outlet of the combustion chamber are communicated with each other through a manifold.