JPH0640948B2 - Plate type reformer - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a plate type reformer used for producing a product gas from a feed fuel such as producing hydrogen from a hydrocarbon fuel.

[Prior Art] As a so-called catalytic reaction apparatus that reforms a supplied fuel into a produced gas by reacting a catalyst, there is a conventional one having a configuration as described in JP-A-53-78983.

Now, the publicly known catalyst reaction device will be described below.
As shown in FIGS. 5 and 5, a plate b is provided in the lower part of the furnace a, and a large number of cylindrical walls c are arranged on the plate b in parallel with the furnace axis. Is a tubular reactor d having an outer diameter smaller than the inner diameter of the tubular wall c and a closed upper end.
And the center tube e is arranged inside the tubular reactor d with a required space, and a cylindrical plug f is concentrically arranged inside the center tube e. The gap between the outer surface of the cylindrical wall c and the inner surface of the cylindrical wall c is an annular burner gas passage g, the gap between the inner surface of the tubular reactor d and the outer surface of the center tube e is an annular reaction chamber h, and the inner surface of the center tube e is A gap between the outer surface of the cylindrical plug f and the outer surface is defined as an annular regeneration chamber i. A hot gas outlet conduit j is provided at the lower end of the annular burner gas passage g, and a steam and hydrocarbon fuel mixture supply conduit k is provided at the lower end of the annular reaction chamber h.
However, at the lower end of the annular regeneration chamber i, the reaction product outlet conduit l
Are connected, the annular burner gas passage g is filled with alumina spheres m, and the annular reaction chamber h is filled with catalyst particles n.
Is filled.

Further, a burner combustion manifold o and an air manifold p are formed at the upper end of the furnace a so as to be partitioned, and the furnace fuel is supplied to the burner combustion manifold o via a conduit q. , Air is supplied to the air manifold p through the conduit r, the combustion of fuel and air is performed by the burner capability s, and the combustion is performed from the burner capability s toward the annular burner gas passage g. I'm trying to flush it.

Therefore, in the above conventional catalytic reactor, when a mixture of steam and hydrocarbon fuel is supplied from the conduit k, the mixture enters the annular reaction chamber h, where the annular burner gas passage g
It is started to be heated by the high temperature gas descending inside, and the reaction is started in the presence of the catalyst particles n. The reaction product moved to the upper part of the reaction chamber h goes down through the regeneration chamber i.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional catalytic reaction device, since air and fuel are put together and flowed while burning, there is a risk of explosion if the fuel is rich, and there is a problem in safety. Further, there is a problem that uniform heat generation is difficult, a temperature difference is generated, and the size is increased as a whole.

Therefore, the present invention is to provide a compact plate-type reformer capable of performing uniform combustion in the entire combustion chamber and effectively performing reforming.

[Means for Solving the Problems] In the present invention, the combustion chamber, the partition wall, and the reforming chamber are stacked in this order to form a unit, and the combustion chambers of the unit are faced to each other and stacked, and both combustion chambers are stacked. A dispersion plate having porosity is sandwiched between the fuel side combustion chamber and the fuel in one fuel side combustion chamber to flow into the other air side combustion chamber through the dispersion plate, and only the fuel inlet is opened in the fuel side fuel chamber. It has a configuration.

[Operation] When steam and hydrocarbon fuel are supplied to the reforming chamber, air is supplied to the air-side combustion chamber, and fuel is supplied to the fuel-side combustion chamber, there is no outlet for the fuel, so the holes in the dispersion plate Through this, all enter the combustion chamber on the air side and are burned. By this combustion, the reforming chambers that may be adjacent to each other via the partition wall are heated,
The steam introduced into the reforming chamber reacts with the hydrocarbon fuel to be reformed and taken out as H ₂ and CO ₂ .

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention, in which a reforming chamber 1 filled with a reforming catalyst 2 and a combustion chamber 3 filled with a combustion catalyst 4 are separated by a partition wall 5. The units I are alternately laminated and integrated as one unit, and the units I are alternately turned over so that the combustion chambers 3 face each other and stacked in a plurality of layers. For example, a sintered plate, a perforated plate, and a sintering catalyst) 6 are sandwiched, holders 7 and 8 are arranged on the upper and lower sides, and they are tightened with an appropriate tightening force to integrate the whole.

The reforming chamber 1 and the combustion chamber 3 which constitute the one unit I are distance plates 9a having hollow portions 10a and 10b therein.
And 9b are used so that they are formed inside the internal hollow portions 10a and 10b. The distance plate 9a for forming the reforming chamber has a supply passage 11 for the fuel F and air A in the periphery.
Supply passage 12 and combustion gas G discharge passage 13 are provided so as to penetrate through the internal hollow portion 10a without opening, and the distance plate 9b for forming the combustion chamber has a supply passage 12 for air A in the peripheral portion. In addition to the exhaust passage 13 for the combustion gas G and the exhaust passage for the hydrocarbon gas and steam (CH ₄ + H ₂ O), the exhaust passage for the hydrogen gas H ₂ and carbon dioxide CO ₂ obtained by the reforming 15 and 15 are provided so as to penetrate the internal hollow portion 10b without opening. Further, in the partition wall 5 and the dispersion plate 6, the flow path 1 is provided corresponding to each flow path provided in both the distance plates 9a and 9b.
1, 12, 13, 14 and 15 are provided respectively, and further, the upper holder 7 is provided with the supply passage 14 and the discharge passage 15 and the lower holder.
The supply flow path 15 is provided at 8, and the supply flow paths 11 and 12 and the discharge flow path 13 are provided at the lower holder 8.

Now, the air A from the air supply flow path 12 of the lower holder 8,
Further, when the fuel F is supplied from the fuel supply channel 11 and CH ₄ + H ₂ O is supplied from the supply channel 14 of the upper holder 7, hydrocarbon fuel (for example, methane gas) and water vapor (CH ₄ + H ₂ O) Enters the reforming chamber 1 of each unit I.

On the other hand, the fuel F rises in the supply passage 11 and sandwiches the dispersion plate 6 into the lower combustion chamber (fuel side) 3a, and the air A rises in the supply passage 12 to move the dispersion plate 6 It enters the upper combustion (air side) 3b. A combustion catalyst 4 is provided in each combustion chamber 3a, 3b, and the combustion F and the air A that enter the combustion catalyst 4 flow in the combustion chambers 3a and 3b, but the fuel side combustion chamber 3a has a fuel inlet. Since there is no outlet, all the fuel F flows through the holes of the dispersion plate 6 into the combustion chamber 3b on the air side as shown by the arrows in FIGS. 2 and 3, and combustion is performed. Since the dispersion plate 6 has holes over the entire area, the fuel F enters the combustion chamber (on the air side) 3b through these holes, so that combustion can be uniformly performed over the entire area of the combustion chamber. The heat generated in the combustion chamber 3 heats the methane gas and the steam in the reforming chambers 1 placed next to each other via the partition wall 5, and the reforming catalyst 2 in the reforming chamber 1 causes CH ₄ + H ₂ O. → CO + 3H ₂ CO + H ₂ O → CO ₂ + H ₂ reaction is performed to reform methane gas into H ₂ and CO ₂ .

Hydrogen and carbon dioxide gas (H ₂ , CO ₂ ) obtained in the above reaction are taken out from the reforming chamber 1 through the discharge passage 15 and the upper holder 7. The combustion gas burned in the combustion chamber 3 is discharged from the combustion chamber 3 through the discharge flow path 13 and the lower holder 8.

The present invention is not limited to the above-described embodiment, and the positions of the respective supply flow paths and the discharge flow paths may be other than the illustrated example, and the number of steps may be two or more.

[Effects of the Invention] As described above, according to the plate-type reformer of the present invention,
Combustion chamber and reforming chamber are integrated as a unit via a partition wall,
The units were superposed so as to face each other in the combustion chamber, and the dispersion plate was sandwiched between the combustion chambers, and the fuel supplied to one combustion chamber while sandwiching the dispersion plate was supplied to the other combustion chamber. Since it is designed to flow through the dispersion plate to the air side, the fuel and air are uniformly contacted in the entire combustion chamber, and uniform combustion can be realized in the entire combustion chamber, eliminating the temperature difference. At the same time, it is safe and can evenly transfer heat to the reforming chamber.

[Brief description of drawings]

1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing a state in which each part is separated, FIG. 2 is a sectional view showing a state in which the state shown in FIG. 1 is integrally assembled, and FIG. FIG. 4 is an enlarged view of part III, FIG. 4 is a cut side view showing an example of a conventional catalytic reaction device, and FIG.
The drawing is a sectional view taken in the direction V of FIG. I is a unit, 1 is a reforming chamber, 2 is a reforming catalyst, 3 is a combustion chamber, 4 is a combustion catalyst, 5 is a partition wall, 6 is a dispersion plate, 9a and 9b are distance plates, 11, 12 and 14 are Supply channels, 13 and 15 are discharge channels, F is fuel, and A is air.

Claims (1)

[Claims] 1. A combustion chamber and a reforming chamber are overlapped with each other via a partition wall to be integrated as one unit, and the units are alternately laminated so that the combustion chambers face each other. Characterized by sandwiching the fuel dispersion plate, sandwiching the dispersion plate so that one combustion chamber is on the fuel side and the other is on the air side, and only the fuel inlet is opened in the fuel side combustion chamber. Plate type reformer.