JPS6223538Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a catalyst device, and more particularly to a catalyst device in which a plurality of replaceable catalyst blocks are arranged in rows to form a catalyst layer.

For example, various boilers, various industrial furnaces, gas turbines, waste treatment equipment, and the like generate combustion gas containing nitrogen oxides during combustion, which must be purified using a catalyst device. In this catalytic device, in order to simplify the replacement of the catalyst, a plurality of catalytic blocks are made, and these are arranged to form a catalytic layer to process the combustion gas.When the catalytic activity decreases, the catalytic block is removed from the catalytic layer. There is a method in which the catalyst block is removed and a new catalyst block is inserted in its place.

FIGS. 1 and 2 are perspective views of essential parts of a catalyst layer in this conventional method. Box-shaped casing 1
For example, a large number of plate-shaped catalysts 7 are loaded into the catalyst block 3 to form a catalyst block 3, and a large number of catalyst blocks 3 are arranged in the front-rear direction or the vertical direction to form a catalyst layer.

Appropriate gaps A are provided between each catalyst block 3 to facilitate replacement of the catalyst blocks 3. As a gas sealing method for this space A, as shown in Fig. 1, a round bar 2 is inserted into the space A, and the round bar 2 is fixed by welding to the adjacent casing 1, or as shown in Fig. 2. In this way, the gap A was closed with the seal plate 4, and the seal plate 4 was fixed by welding to the adjacent casing 1.
In FIG. 2, reference numeral 6 denotes a support member that supports the catalyst block 3. These round rods 2 and seal plates 4 extend in a direction perpendicular to the flow of the gas G to be processed.

However, in such a conventional structure, when replacing the catalyst block 3, the round rod 2 and the seal plate 4 must be replaced.
This required work such as welding and gas cutting, making replacement work extremely complicated and inefficient.

The object of the present invention is to eliminate the drawbacks of the prior art and to provide a catalyst device in which the sealing between catalyst blocks is reliable and the catalyst blocks can be easily replaced.

In order to achieve this object, the present invention provides a catalyst device in which a plurality of replaceable catalyst blocks are arranged at predetermined intervals to form a catalyst layer.
The gap between the catalyst blocks is closed with an elastic sealing member extending in a direction interlinked with the flow direction of the fluid to be treated, and a locking portion provided near the side end of the sealing member is used to close the gap between the catalyst blocks. The present invention is characterized in that the sealing member is removably supported between the catalyst blocks by being elastically engaged with the blocks.

Next, an embodiment of the present invention will be described with reference to the drawings. 3 to 6 are diagrams showing the first embodiment. As shown in FIG. 3, a catalyst block 3 is made by loading a large number of plate-shaped catalysts 7 at predetermined intervals in a box-shaped casing 1 having openings on both sides. A catalyst layer is constructed by arranging a large number of these catalyst blocks 3 in the front-rear direction or in the vertical direction, and the gap A between the catalyst blocks 3 is usually about 5 to 5 mm in order to facilitate the insertion and removal of the catalyst blocks 3.
It is held at 20mm. And in this interval A, there is a fifth
As shown in the drawings and FIG. 6, the seal member 5 is press-fitted.

The sealing member 5 is made of an elastic plate such as stainless steel, and is formed to have a substantially Ω-shaped planar shape, and has a fitting portion 8 in the center and locking portions 9 near both ends. There is. Before this seal member 5 is inserted into the gap A between the catalyst blocks 3, the gap B between the locking parts 9 on both sides is designed to be slightly larger than the gap A, as shown by dotted lines in FIG. There is.

The sealing member 5 is pushed into the upstream side of the gap A in the flow direction of the gas G to be processed, with the fitting portion 8 first. As a result, the fitting portion 8 of the seal member 5 fits into the gap A and closes the gap A. Then, both ends of the sealing member 5 are pressed inwardly to generate an elastic force, thereby causing the locking portion 9
is in elastic contact with the casing 1 of the adjacent catalyst block 3, and the sealing member 5 is locked between the catalyst blocks 3.
Retained.

Further, as shown in FIG. 6, the sealing member 5 is arranged to extend in a direction interlinked with the flow direction of the gas to be processed G, and prevents gas leakage from the gap A. The flow pressure of the gas to be processed G is applied to this seal member 5, thereby making the fixation of the seal member 5 more reliable.

When replacing the catalyst block 3 due to a decrease in catalyst activity, etc., pinch both ends of the sealing member 5 and push them inward to move the sealing member 5 between the
extract it from Thereafter, the catalyst block 3 may be replaced with a new one, and the sealing member 5 may be pushed into the gap A again.

FIG. 7 is a diagram for explaining a second embodiment of the present invention. In the case of this embodiment, the sealing member 5 is formed so that the planar shape is approximately U-shaped, and a cover portion 10 is formed in the center, and locking portions 9, 9 extending in the same direction are formed on both sides of the cover portion 10. There is. Further, in order to easily fit the sealing member 5 between the catalyst blocks 3, the tip of the locking portion 9 is bent slightly outward. The distance between the locking portions 9, 9 before the seal member 5 is fitted between the catalyst blocks 3, 3 is designed to be slightly smaller than the distance A between the catalyst blocks 3.

The sealing member 5 is pushed into the upstream side of the gap A in the flow direction of the gas G to be treated, with the locking portion 9 first. With this pushing, the locking portion 9 of the seal member 5
are pushed apart while straddling the casings 1 and 1 on both sides, and the cover portion 10 closes the gap A, and elastic force is generated in the locking portions 9 on both sides, causing them to come into elastic contact with the casing 1. , the seal member 5 is locked and held between the catalyst blocks 3. In this case as well, the flow pressure of the gas to be processed G is applied to the seal member 5, and the fixation of the seal member 5 becomes more reliable.

The sealing member 5 used in the first and second embodiments can be easily manufactured by pressing or drawing a thin metal plate having a thickness of about 0.3 mm, for example. Also, since the distance A between the catalyst blocks 3 may vary to some extent, several types of seal members 5 with different distances between the locking portions 9, 9 are prepared in advance.
What is necessary is to select the sealing member 5 that matches the size of the gap A.

The present invention has the above-mentioned structure, and uses the elasticity of the sealing member to removably hold the sealing member between the catalyst blocks, making it very easy to replace the catalyst blocks and reducing work. Efficiency can be improved.

[Brief explanation of the drawing]

1 and 2 are perspective views of main parts of a conventional catalyst device, and FIGS. 3 and 6 show the state before and after the seal member according to the first embodiment of the present invention is fitted. 4 is a perspective view of the seal member, FIG. 5 is an enlarged sectional view of the main part showing the seal member fitted between the catalyst blocks, and FIG. 7 is a perspective view of the main part of the catalyst layer. FIG. 7 is an enlarged cross-sectional view of a main part showing a state in which a seal member according to a second embodiment is installed between catalyst blocks. 3... Catalyst block, 5... Seal member, 9...
...Locking part, A... Distance between catalyst blocks, G...
Gas to be processed.

Claims (1)

[Scope of utility model registration request] In a catalyst device in which a plurality of replaceable catalyst blocks are arranged at a predetermined distance from each other to form a catalyst layer, the distance between the catalyst blocks is elastic and parallel to the flow direction of the fluid to be treated. The sealing member is closed by a sealing member extending in the interlinking direction, and the locking portion provided near the side end of the sealing member is elastically locked to the catalyst block, so that the sealing member can be attached and detached between the catalyst blocks. A catalyst device characterized by supporting.