JPH07232081A - Supporting device for catalytic element in modularized catalyst - Google Patents

Abstract

(57) [Abstract] [Structure] A plurality of rectangular parallelepiped catalytic elements (5) are provided with locking members (1) (10) on the side surfaces thereof, and a friction member (1) is provided on the inner surface of a storage frame (3) for accommodating the elements. 4) Paste, storage frame
(3) A support device for a catalyst element in a modularized catalyst, characterized in that the self-weight of a plurality of catalyst elements (5) arranged in (3) is supported by a low-level latching member and friction member. [Effect] The plurality of catalyst elements (5) arranged in the storage frame (3) can be supported by the engagement of the respective retaining members (1) and (10), and the retaining members (1) ) (10) is the friction member
Due to the large friction between the retaining member (1) (10) and the friction member (4) caused by cutting into (4), the catalytic element (5)
Can be held in the storage frame (3). Therefore, the lower end of the catalytic element does not come into contact with the receiving member, so that the catalytic element is not damaged by vibration due to gas flow or thermal expansion of the frame and the receiving member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honeycomb-shaped exhaust gas purifying catalyst used as, for example, a catalyst for catalytic reduction of nitrogen oxides (NOx) or a NOx absorption / removal agent, and more particularly to a modularized catalyst. The present invention relates to a supporting device for a constituent catalytic element.

[0002]

2. Description of the Related Art As a catalyst for catalytic reduction of NOx, a large number of catalyst elements are stored in a storage frame in which a catalyst metal is carried on a carrier having a flat plate / corrugated plate multi-layer structure in which a flat plate and a corrugated plate are arranged one by one. Modularized catalysts are known. This is intended to be easy to handle by modularizing the above catalyst.

In a conventional modularized catalyst, as shown in FIG. 5, a catalyst element (51) having the above-mentioned flat plate / corrugated plate multilayer structure is used.
Were inserted one by one into the steel storage frame (52) and placed on the grating-shaped receiving member (53) provided at the lower end of the frame (52).

[0004]

However, as described above, the weight of the catalytic element (51) is reduced by the receiving member of the frame (52).
In the structure directly received by the (53), the lower end of the catalytic element (51) in the steel storage frame (52) causes vibration due to gas flow, thermal expansion of the frame (52) and the receiving member (53). As a result, it may move in contact with the receiving member (53), which may result in damage.

In view of the above points, the present invention provides a catalyst element in which the lower end of the catalyst element does not come into contact with the receiving member and therefore is not damaged by vibration due to gas flow or thermal expansion of the frame and the receiving member. The purpose is to

[0006]

The present invention has been devised in order to achieve the above-mentioned object. A plurality of rectangular parallelepiped catalyst elements (5) are provided with hooking members (1) (10) protruding from the side surfaces thereof. Provided,
The friction member (4) is attached to the inner surface of the storage frame (3) for accommodating the elements, and the catalyst elements (5) arranged in the storage frame (3) are supported by the latching members and friction members whose weight is low. And a supporting device for a catalytic element in a modularized catalyst.

The catalyst element (5) is composed of, for example, a flat plate-corrugated plate ceramic paper (7) and a corrugated plate-shaped ceramic paper (8) arranged one by one, and a catalyst metal on a carrier having a flat plate / corrugated plate multilayer structure. Is carried. However,
The material of the flat plate and the corrugated plate is not limited to ceramic paper. The catalytic element (5) is usually surrounded by a reinforcing side wall (2) made of ceramic paper.

The latch members (1) and (10) are made of a long plate material made of, for example, a metal plate such as stainless steel or a ceramic plate. The latch members (1) and (10) are not limited in shape as long as they form a protrusion for latching on the side surface of the catalyst element (5) or the reinforcing side wall (2) of the catalyst element (5).

To fix the hooking members (1) (10) to the side surface of the catalyst element (5) or the reinforcing side wall (2) of the catalyst element (5), the hooking members (1) (10) are fixed with an adhesive. The method is generally applied to the above side surface in the horizontal direction, but is not limited to this. The fixed height of the latch members (1) and (10) is preferably different for each catalyst element.

The number of the retaining members (1) (10) on one side surface of the catalyst element (5) may be one, but a plurality is preferable. The intervals between the hooking members (1) and (10) on the side surfaces of the plurality of catalyst elements (5) facing each other may be the same or different.

The friction member (4) is made of, for example, a sponge-like member or urethane foam, and is, for example, a flat plate-like member. The friction member (4) is usually attached to the entire inner peripheral surface of the storage frame (3) with an adhesive.

[0012]

EXAMPLES Examples of the present invention will be shown below to specifically explain the present invention.

Example 1 In FIGS. 1 to 3, a vertically long rectangular parallelepiped catalytic element
(5) is composed of a flat plate / corrugated plate multilayer structure carrier in which a flat plate-shaped ceramic paper (7) and a corrugated plate-shaped ceramic paper (8) are placed every other sheet, and a catalytic metal is carried on the carrier. is there. The catalytic element (5) is surrounded by a rectangular tubular reinforcing side wall (2).

A pair of upper and lower retaining members (1) and (10) are horizontally attached with an adhesive to the side surfaces of the reinforcing side wall (2) of the catalyst element (5). These hooking members (1) and (10) are long plate-shaped members made of a ceramic plate and having the same width and the same length.

In this example, a plurality of catalytic elements
The space between the upper and lower latching members (1) and (10) in (5) is set to the right catalyst element in the left catalyst element (5) in FIG.
Larger than (5). Regarding the level of the upper and lower retaining members (1) (10), the upper retaining member (1) of the left catalyst element (5) is the upper retaining member (1) of the right catalyst element (5).
The former is supported by the latter, that is, the lower latch member, which is higher by the width thereof. In addition, the lower hook member (10) of the left catalyst element (5) is the right catalyst element.
The width is lower than the lower hooking member (10) of (5) by the width of the lower hooking member (10), and the latter is supported by the former one, that is, the lower hooking member.
In this way, the adjacent left and right catalyst elements (5) are supported by each other by the engagement of the respective retaining members (1).

On the other hand, a friction member (4) made of a plate-shaped sponge is attached to the entire inner peripheral surface of the storage frame (3) for accommodating the elements with an adhesive. Then, a plurality of catalyst elements (5) are arranged in the storage frame (3), and each of the latch members (1) (1
(0) support each other by engagement, and projecting hook members
(1) (10) bite into the friction member (4) to lock
(1) A large frictional force is generated between (10) and the friction member (4),
As a result, the catalytic element (5) is held in the storage frame (3). Thus, the catalyst element (5) is held in the storage frame (3) so that its lower end does not come into contact with the grating-shaped receiving member (6) provided at the lower end of the storage frame (3), and the modularized catalyst (5) is 9) is obtained.

Example 2 In FIG. 4, in this example, a plurality of catalytic elements
The distance between the upper and lower latch members (1) and (10) in (5) is such that the left catalyst element (5) and the right catalyst element (5) in FIG.
And is the same. Regarding the level of the latch members (1) (10), the upper and lower latch members (1) of the left catalyst element (5)
(10) is higher than the upper and lower latching members (1) and (10) of the catalyst element (5) on the right side by the width thereof, and the former is supported by the latter latching member, that is, the lower latching member.

Other points are the same as in the first embodiment.

[0019]

In the catalyst element according to the present invention, a plurality of rectangular parallelepiped catalyst elements (5) are provided with projecting latching members (1) on their side surfaces, and a friction member (1) is provided on the inner surface of a storage frame (3) for accommodating the elements. 4) is affixed to each latch member (1) (10) so that a plurality of catalyst elements (5) arranged in the storage frame (3) can be attached.
Can be supported by the engagement of the ridges, and the latch members (1) (10) and the friction member (4) generated by the latch members (1) (10) of the ridges biting into the friction member (4) Due to the large friction of the catalyst element (5), the catalyst element (5) can be held in the storage frame (3).

Therefore, the lower end of the catalytic element does not come into contact with the receiving member, so that the catalytic element is not damaged by vibration due to gas flow or thermal expansion of the frame and the receiving member.

Further, the strength of the catalyst element (5) can be increased by the hooking members (1) (10) provided on the side surface of the catalyst element (5), and in addition, the transportation of the catalyst element (5) In addition, the latching members (1) and (10) serve as a protective plate during assembly, so that transportation or assembly work can be easily performed.

Reinforcing sidewalls (2) around the catalytic element (5)
In the case of providing, the reinforcing side wall (2) not only increases the strength of the catalyst element, but also serves as a protective plate when handling the catalyst element, which facilitates handling.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a modularized catalyst according to an embodiment.

FIG. 2 is a partially cutaway perspective view showing a catalyst element according to an embodiment.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a cross-sectional view corresponding to FIG. 3 showing a catalyst element that is a catalyst module of an example.

FIG. 5 is a partially cutaway perspective view showing a conventional modularized catalyst.

[Explanation of symbols]

 (1) (10) Hook member (2) Reinforcement side wall (3) Storage frame (4) Friction member (5) Catalytic element (6) Receiving member (9) Modular catalyst

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B01D 53/94 B01J 35/04 ZAB 311 A F01N 3/28 ZAB 311 S

Claims (2)

[Claims] 1. A plurality of rectangular parallelepiped catalytic elements (5) are provided with locking members (1) (10) on their side surfaces, and a friction member (4) is attached to the inner surface of a storage frame (3) for accommodating the elements. In addition, the supporting of the catalytic element in the modularized catalyst is characterized in that the own weight of the plurality of catalytic elements (5) arranged in the storage frame (3) is supported by the low-level latching member and friction member. apparatus. 2. Reinforced sidewalls around the catalytic element (5)
The support device according to claim 1, further comprising (2).