JPS59225742A - Catalyst constitution - Google Patents

Abstract

PURPOSE:To enhance reaction effect while suppressing flow resistance low, by alternately superposing coarse mesh and fine mesh metal nets. CONSTITUTION:In catalyst constitution 11 constituted so that large number of catalyst elements are respectively constituted of metal nets 3, 4 and a fluid to be treated is flowed under such a state that a large number of said metal nets are superposed in a laminated form toward the laminate direction thereof, the above mentioned metal nets are superposed so as to alternately position the coarse mesh metal nets 3 and the metal nets 4 each having a mesh size finer than that of each metal net 3. As a result, reaction effect can be enhanced while flow resistance is suppressed low.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves polymerizing a large number of wire meshes and flowing a fluid to be treated in the direction in which the wire meshes are laminated. The present invention relates to a catalyst configuration that allows a reaction to occur effectively in relation to a catalytic material provided in the catalyst.

In this type of catalyst structure, in the conventional catalyst structure, which is constructed by polymerizing a large number of wire meshes, when each wire and network of the polymerized wire meshes is polymerized accurately, each mesh is It looks like a square cylinder, and the degree of contact between the fluid and the catalyst is small, and the reaction is also low.However, as shown in Φ) in Fig. 4, the wires of the wire mesh 3 adjacent to the mesh of the wire mesh 3 When the wire meshes polymerize (as in the thick part), the polymerized wire meshes are in a state of blocking each other's meshes with their own filaments, and the flow resistance increases tremendously. Therefore, the polymerization (lamination) work of wire mesh is carried out in the arrangement state K of the small meshes of each wire mesh.
There was a problem in that the product had to be made with such consideration in mind.

Therefore, the present invention has been developed to eliminate the above-mentioned problems, and is a catalyst that can increase the reaction effect while keeping the flow resistance low by alternately stacking coarse and dense wire meshes. It attempts to provide a structure.

The figures showing the embodiments of the present application will be explained below. Reference numerals 1 and 2 in FIG. 1 indicate belt-shaped wire meshes that can be seen in the normal wire mesh manufacturing process, and 1 indicates a coarse wire mesh;
2 also shows a dense wire mesh. Reference numerals 3 and 4 respectively indicate the size of the pieces of wire mesh that are cut off at the cut 5 in accordance with the requirements for obtaining the desired size, ie the area required for the catalyst configuration. Each wire mesh separated in this way (
The catalyst elements 3.4) are arranged in such a way that coarse mesh wire mesh 3 and close mesh wire mesh 4 are alternately arranged as shown in FIG. 2, and are laminated in multiple layers as shown in FIG. 8.

Incidentally, reference numeral 10 indicates a commonly known holding frame, which prevents a large number of polymer alloy networks from separating. 10'
indicates the side wall, and 10# indicates the bent portion. This holding frame 10
is a large number of wire meshes 3.4°3.4. as shown in Figure 8.・・・・・・
・Hold 3.4 in a stacked state, and pass the fluid to be treated from one of the mouths toward the other mouth, that is, in the stacking direction, so that the fluid comes into contact with the wire mesh in the process of passing. , it may be of any kind as long as it enables an efficient reaction to take place.

The catalyst structure 11 constructed by stacking a large number of wire meshes (catalyst elements 3.4) in this way has relatively little flow resistance and can have relatively high reaction efficiency. For example, the example shown in Figure 4 (a) shows an example in which part of the coarse mesh wire mesh 3 and the close mesh wire mesh 4 are polymerized, as is clear from this example. Because the mesh pitches of the two wire meshes are different from each other, in some parts the wire mesh of the other wire overlaps with the wire wire of the other wire wire mesh, but in other mesh regions, the wire wires of the other wire mesh do not overlap, and as a result, it is difficult to see from the fluid. In this case, there will be large mesh portions and small mesh portions. As a whole, meshes of different sizes exist in a randomly overlapping state.

On the other hand, the one shown in FIG. 4 (CB) shows an example in which wire meshes of the same pitch are overlapped. Temporarily one wire mesh. net f
l"K, on the other hand., net. If the l^8-point A is also important, it means that the wire mesh as a whole has the same pitch, so all the meshes of the other wire mesh are connected to the wires of the other wire mesh. As a result, the fluid passage holes in the entire area become blocked, which is a truly undesirable condition.

Experimental examples are shown in the table below. In this experimental example, all of the wire meshes in the one-stage interior had 20 meshes, and (3) 90 of these wire meshes were stacked one on top of the other, and the results of measuring the pressure loss in that case are shown. In addition, the flow rate is 5
Since the measurements were carried out on different types of substances, the results are shown for each type.

The 2nd and 8th experimental examples show examples in which the meshes were changed considerably. The 4.5th stage on the experimental side shows an example in which half of the wire meshes corresponding to the above-mentioned meshes and half of the wire meshes of different meshes were alternately polymerized and measured. As is clear from the experimental examples shown in the fourth and fifth rows, preferable pressure loss resistance results were obtained compared to those in the first, second, and eighth rows.

Next, the experimental side parts 6 and 7 correspond to the experimental example of the first stage, and the total number of the two types of wire mesh is increased so that the surface area is the same as that of the first stage wire mesh. This is an example of an experiment conducted using the following methods. Even in this case, favorable results were obtained in the pressure loss measurement compared to the experimental examples described above.

(4) As described above, in this invention, since a wire mesh is used as a component of the catalyst, the material cost is extremely low, and it is effective in providing an inexpensive (low-cost) catalyst structure. .

In addition, in the present invention, when a large number of wire meshes are polymerized, since the coarse mesh wire meshes 3 and the dense mesh wire meshes 4 are alternately stacked, the flow state of the fluid to be treated flowing through each mesh is disturbed. The fluid flowing through the mesh becomes turbulent with each other, resulting in a high degree of contact with the catalyst, which also has the effect of increasing the degree of reactivity.

Furthermore, as is clear from the comparative explanation of the force between the coarse mesh 3 and the close mesh 4 (the curvature is that of (A) in Figure 4), the coarse mesh wire mesh 3.3 with the same pitch is mutually Compared to the case of the overlapping part 4m as shown in Fig. 4 CB), the overlapping part ν of the coarse wire mesh 3 and the even denser wire mesh 4 has less flow resistance as a whole. This invention also has the advantage that there is less obstruction to the flow of fluid during use as shown in Figure 3.A further feature of the present invention is that the structure of the catalyst is simply a metal mesh with a coarse mesh and a dense mesh. Because it is simply polymerizing alternately,
There is also the simplicity that allows extremely quick work to be done at the time of combination i (or at the time of rearrangement during repair).

Furthermore, since the present invention uses wire meshes 3.4 with coarse mesh and close mesh, from the above-mentioned circumstances, even if the directions of the wire meshes of each wire mesh are parallel to each other as shown in FIG. 2, there will be resistance to fluid flow. can be kept low as described above, and as a result, as shown in FIG. 1, there is less loss per 1° belt-shaped wire mesh, which is economically advantageous.

It also has the effect of further reducing the cost of materials for the wire mesh catalyst and providing an inexpensive catalyst structure.

[Brief explanation of the drawing]

The drawings show examples of the present invention, and FIG. 1 is a plan view showing an example of cutting a piece of wire mesh as a catalyst element from a belt-shaped wire mesh, and FIG. An exploded perspective view for explaining the state of alternating polymerization, FIG. 8 is a schematic vertical cross-sectional view of a catalyst structure constructed by polymerizing a large number of wire meshes, and FIG. 4 shows a case in which dense and loose wire meshes are polymerized. A front view for comparing the circulation area when wire meshes with the same pitch are polymerized. 3.4... Wire mesh as catalyst element, ■... Catalyst configuration. Agent Hiroshi Satake

Claims (1)

[Claims] A large number of catalyst elements are each made of a wire mesh, and in a catalyst configuration in which the large number of wire meshes are polymerized in a laminated state and the fluid to be treated flows in the direction of the lamination, the wire mesh is A catalyst structure characterized by polymerization such that coarse wire mesh and denser wire mesh are alternately positioned.