JPS62160135A - Plate-shaped reforming apparatus - Google Patents

Abstract

PURPOSE:To reduce the pressure loss of the fluid flowing through a reforming chamber, by providing a plurality of partitioned chambers to the surfaces in the side of the reforming chamber of partition walls incorporated so as to hold the reforming chamber there between so as to mutually shift the positions thereof on the opposed surfaces of both partition walls. CONSTITUTION:Steam and hydrocarbon fuel (CH4integral +H2) flowing through a reforming chamber 1 is heated by heat generated through the combustion of the fuel F supplied to a combustion chamber 3 is the presence of air A and reacted in the reforming chamber 1 by a reforming catalyst 2 to be taken out as H2CO2. A combustion catalyst 4 is held between partition walls a, 5b in the combustion chamber 3 and air A is made to flow to the area above the catalyst 4 while the fuel F is made to flow to the area below the catalyst 4 and, because the combustion chamber 3 has no outlet of the fuel F, the fuel F passes through the entire region of the combustion catalyst 4 to be capable of being mixed with air. Therefore, heat is uniformly generated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a plate reformer for use in producing product gas from a feed fuel, such as producing hydrogen from a hydrocarbon fuel.

[Prior Art] Conventionally, a so-called catalytic reaction device for reforming supplied fuel into a generated gas by reacting a catalyst has been disclosed in Japanese Patent Application Laid-Open No. 53-789.
There is a structure as described in Japanese Patent No. 83.

Now, to explain the above-mentioned known catalytic reaction device, the fourth
As shown in the figure and FIG. 5, a plate b is provided at the lower part of the furnace a, and on the plate b, a large number of cylindrical walls C are arranged parallel to the furnace axis, and inside the container cylindrical wall C. , the cylindrical wall C
A tubular reactor d, which has an outer diameter smaller than the inner diameter and whose upper end is closed, is positioned upright, and a center tube e is placed inside the tubular reactor d with a required interval, and further inside the center tube e. A tubular plug f is arranged concentrically in the tubular reactor d, the gap between the outer surface of the tubular reactor d and the inner surface of the tubular wall C is an annular burner gas passage g, and the tubular reactor d
The gap between the inner surface of the center tube e and the outer surface of the center tube e is defined as an annular reaction ih, and the gap between the inner surface of the center tube e and the outer surface of the cylindrical plug f is defined as an annular regeneration chamber i. Further, at the lower end of the annular burner gas passage g, there is an outlet conduit j for high temperature gas.
However, a supply conduit k for a mixture of steam and hydrocarbon fuel is connected to the lower end of the annular reaction tube, and an outlet conduit 1 for the reaction product is connected to the lower end of the annular regeneration tube 1. is filled with alumina spheres m, and the cyclic reactor is filled with catalyst particles n.

Furthermore, a burner combustion manifold O and an air manifold p are formed separately at the upper end of the furnace a, and the burner combustion manifold O is supplied with furnace fuel through a conduit q. , air is supplied to the air manifold p via a conduit r, combustion of fuel and air takes place in a burner cavity S, and the high temperature gas generated here passes through an annular burner gas passage 9. be.

Thus, in the conventional catalytic reactor described above, when the conduit supplies a mixture of steam and hydrocarbon fuel, the mixture enters the annular reaction ih where it is heated by the hot gas descending in the annular burner gas passage Q. Initially, the reaction is initiated in the presence of catalyst particles n. The reaction products that have moved upward through the reaction stage descend through the regeneration stage 1.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional catalytic reaction device, the mixture of steam and hydrocarbon fuel rises in the narrow annular reaction yh, resulting in a large pressure drop, and the reforming catalyst particles n There was a risk of a sudden temperature rise inside the building.

The present invention provides a plate-type reforming device that can be made smaller by increasing the heat transfer area, while at the same time reducing the pressure loss of steam and hydrocarbon fuel, and suppressing the rapid temperature rise within the reforming catalyst. This is what I am trying to do.

[Means for Solving the Problems] The present invention provides a structure in which reforming chambers and combustion chambers are stacked alternately with partition walls interposed therebetween, and the reforming chambers are located at different positions on the left and right sides of both partition walls that sandwich the reforming chambers. A convex portion is provided so that the convex portions of the partition walls facing each other across the reforming chamber do not overlap with each other.

[Effect: The partition wall that is interposed between the stacked reforming chamber and the combustion chamber is provided with convex portions on the reforming chamber side at different positions to form compartments. The steam and hydrocarbon fuel entering the reforming chamber pass through the reforming catalyst and flow alternately from the compartments of one partition wall to the compartments of the other partition wall.

This can reduce pressure loss and also suppress rapid temperature rise.

[Example] Embodiments 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 5a.

Stack alternately through 5b. The reforming chamber 1 is formed in a space surrounded by the internal hollowed out part 7a of the distance plate 6a and the partition walls 5a, 5t), which are hollowed out except for the periphery, and the combustion chamber 3 is also hollowed out. It is formed in a space surrounded by the internal recessed portion 7b of the distance plate 6b having the recessed portion 7b and the partition walls 5a and 5b. Further, in the periphery of the distance plate 6a, supply channels 8 and 9 for fuel F and air for combustion are provided to pass through, and a discharge channel 10 for combustion gas G is provided to extend through the distance plate 6a. Around the plate 6b,
Supply channel 11 for steam and hydrocarbon fuel (CH4+H20) to be reformed, and hydrogen and carbon dioxide gas (H20) obtained by reforming.
, CO2).

The feature of the present invention is the partition walls 5a and 5b.

A partition wall 5a interposed between the reforming chamber 1 and the combustion chamber 3;
The surface of the reforming chamber 1 side of 5b is partitioned with a convex portion 13 so that a plurality of compartments 14 are formed at positions shifted left and right as shown in FIG. Grooves are formed by providing unevenness 15 for uniformly distributing the flow of and hydrocarbons (CH4+H20). On the other hand, the partition wall 5a.

On the surface of the combustion chamber 3 of 5b, grooves are formed with unevenness for flowing the fuel F or air from one side to the other.

In the periphery of each of the partition walls 5a and 5b, there are provided a fuel F supply channel 8, an air supply channel 9, a combustion gas G exhaust channel 10, and water vapor and hydrocarbons provided in the distance plates 6a and 6b. Each flow path is provided so as to pass through so as to correspond to the fuel supply flow path 11 and the hydrogen and carbon dioxide gas discharge flow path 12, respectively. Only the passage 12 is opened into the compartment 14, and steam and hydrocarbon fuel (CHa +820) enter the reforming chamber 1, and hydrogen and carbon dioxide gas (H2°C02) obtained by reforming are discharged. It is intended to be taken out through channel 12. Further, on the surfaces of the partition walls 5a and 5b on the combustion chamber 3 side, the fuel
Supply channels 8 and 9 are opened in grooves formed by unevenness so that air A can enter the combustion chamber 3 from the side surface of the combustion chamber of the partition wall 5a, and air A can enter the combustion chamber 3 from the side surface of the combustion chamber of the partition wall 5b. Only the combustion gas exhaust passage 10 of 5b is opened in a groove formed by the unevenness of the surface on the combustion chamber side.

When the reforming chamber 1 and the combustion chamber 3 are stacked with the partition walls 5a and 5b in between, the partition walls 5a and 5b sandwich the reforming chamber 1 from above and below.
Since the compartments 14 on the opposing surfaces are offset from each other, water vapor and hydrocarbon fuel (Ctja 1H20) pass through the reforming catalyst 2 from one compartment 14 of the partition wall 5a, as shown in FIG. The flow is such that it enters one partition 14 of the partition 5b and then enters the other partition 14 of the partition 5a again. At this time, the partitions 14 of the partition walls 5a, 5b are sufficiently large so that CH4+H2 can flow through the catalyst 2 between the partitions 14 of the partition walls 5a, 5b.
0 can be flowed with reduced pressure loss.

The steam and hydrocarbon fuel <CHa 1 H20) flowing in the reforming chamber 1 as described above are heated by the heat generated by the combustion of the fuel F and air A supplied to the combustion chamber 3, and are used for reforming. The reaction of CH4+H20→CO+3H2 GO+H20→CO2+H2 is performed in the reforming chamber 1 by the catalyst 2, and the reaction is taken out as H2 and CO2.

On the other hand, in the combustion chamber 3, the combustion catalyst 4 is connected to the partition walls 5a and 5.
In the embodiment of FIG. Although it is inserted, there is no outlet, so the fuel F is the combustion catalyst 4.
It is possible to mix with air through the catalyst 4 over the entire region, so that heat is generated uniformly. This uniform heat generation prevents a rapid temperature rise within the combustion catalyst 4.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and the number of stacked stages may be increased beyond the number shown in the figure, and the partitioning section 14 may be partitioned in a manner other than that shown in FIG. Of course, various changes can be made without departing from the gist of the invention.

[Effects of the Invention] As described above, according to the plate-type reforming device of the present invention,
In a plate-type reformer in which a reforming chamber and a combustion chamber are stacked together with a partition wall in between, a plurality of partitions are provided at staggered positions on the reforming chamber side surface of the partition wall arranged to sandwich the reforming chamber. Since the fluid flows from one section of one partition wall to the section of the other partition wall through the reforming catalyst, the pressure drop of the fluid flowing inside the reforming chamber can be reduced and a sudden temperature rise can be suppressed. In addition, excellent effects such as the ability to widen the heat transfer surface and downsize the entire device can be achieved.

[Brief explanation of drawings]

FIG. 1 is an embodiment of the plate-type reforming device of the present invention showing a state in which each part is separated; FIG. 3 is a sectional view of the reforming chamber, FIG. 4 is a cutaway side view showing an example of a conventional catalytic reaction device, and FIG. 5 is a sectional view in the V direction of FIG. 4. 1 is a reforming chamber, 2 is a reforming catalyst, 3 is a combustion chamber, 4 is a combustion catalyst, 5a, 5b are partition walls, 8, 9.11 are supply channels,
10. 12 indicates a discharge channel, 13 indicates a convex portion, and 14 indicates a compartment.

Claims (1)

[Claims] 1) Reforming chambers and combustion chambers are stacked alternately with partition walls in between,
A plurality of compartments are provided on the reforming chamber side surface of each of the partition walls built in such a way as to sandwich the reforming chamber, and the reforming catalyst is passed from the compartment of one partition to the compartment of the other partition and then back to the other. A plate-shaped reforming device characterized in that the respective compartments are shifted from each other on opposing surfaces of both partitions so that fluid flows into other compartments of the partitions.