JP3058444U - Modularized catalyst - Google Patents

Abstract

(57) [Problem] To provide a modularized catalyst which can be easily modularized, can reliably absorb a difference in thermal expansion between a storage frame and a catalyst element, and can hold the catalyst element. SOLUTION: A cushioning material 8 is attached to an inner surface of a rectangular cylindrical storage frame 9 composed of four side plates 2 connected by hinges. At least one hinge portion of the storage frame 9 is opened, and a required number of catalyst elements 1 are arranged in the storage frame 9. The catalyst element 1 is tightened by the four side plates 2 of the storage frame 9, the four side plates 2 are fixed to the retainer 3, and the open hinge portion is closed to obtain a modular catalyst. The reinforcing plate 5 is attached to the catalyst element 1, and the catalyst element 1 and the reinforcing plate 5 are supported by the retainer 3.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to, for example, a honeycomb-shaped modular catalyst used as a catalyst for catalytic reduction of nitrogen oxides (NOx) and a NOx absorbing and removing agent.

[0002]

[Prior art]

 As shown in FIG. 1, a conventional modular catalyst has a cushioning material (8) attached to the inner surface of a rectangular tubular storage frame (9) consisting of four side plates (2) connected by a hinge, At least one hinge of (9) is opened, the required number of catalyst elements (1) are arranged in the storage frame (9), and the catalyst elements (4) are mounted on the four side plates (2) of the storage frame (9). 1), and the four side plates (2) are fixed to the grating-shaped retainer (3) with rivets or bolts and nuts (4), and the opened hinge is closed. This catalyst module has a structure in which the catalyst element (1) is held by the surface pressure due to the restoring force of the cushioning material (8).

[0003]

[Problems to be solved by the invention]

 In the modularized catalyst having the above structure, since the catalyst element (1) is structurally weak, the catalyst element (1) is adjusted so that the compression load applied from the buffer material (8) to the catalyst element (1) is constant. The dimensions of the storage frame (9) and the cushioning material (8) are measured, and a combination is selected so that the compression amount of the buffer material (8) is constant. I was going. This made the task of modularization complicated.

When there is a difference in thermal expansion between the housing frame (9) and the catalyst element (1), a structure for absorbing the difference in thermal expansion by restoring the cushioning material (8) and holding the catalyst element is provided. However, the manufacturing tolerance of the cushioning material (8) is large, and it is extremely difficult to control the compression amount and compression load of the cushioning material (8) .If the thermal expansion difference is large, permanent deformation occurs. The restoration of the buffer material (8) alone may not be able to absorb the thermal expansion difference and may not be able to hold the catalyst element.

[0005] In view of the above points, the object of the present invention is to simplify the work of modularization and to reliably absorb the difference in thermal expansion between the storage frames (9) and (8) and the catalyst element (1). An object of the present invention is to provide a modular catalyst capable of holding a catalyst element.

[0006]

[Means for Solving the Problems]

 The modularized catalyst according to the present invention is provided with a cushioning material (8) on the inner surface of a rectangular cylindrical storage frame (9) consisting of four side plates (2) connected by a hinge, and at least one of the storage frames (9). Open the two hinges, place the required number of catalyst elements (1) in the storage frame (9), and tighten the catalyst element (1) with the four side plates (2) of the storage frame (9). In the modularized catalyst with the four side plates (2) fixed to the retainer (3) and the opened hinge part closed, the reinforcing plate (5) is attached to the catalyst element (1), and the catalyst element (1) ) And the reinforcing plate (5) are supported by a retainer (3).

It is preferred that the required number of catalyst elements (1) be integrated by bonding. The catalyst element (1) may be integrated with all the elements or only a part of the elements.

It is preferable that the retainer (3) is disposed immediately below the reinforcing plate (5), and the catalyst element (1) is supported by the retainer (3).

A reinforcing plate (5) attached to the catalyst element (1) is placed on a grating-like retainer (3) to improve the supporting force of the catalyst element (1).

The preferred shape of the reinforcing plate (5) is an L-shaped vertical cross section. A more preferable shape of the reinforcing plate (5) is an L-shaped vertical cross-section and a shape in which a middle portion of a horizontal portion of the L-shaped reinforcing plate (5) is notched. However, the reinforcing plate (5) may be a flat plate.

The reinforcing plate (5) is made of a ceramic plate or a metal plate.

It is also preferable to reinforce the side surface of the catalyst element (1) by applying a curing agent to the same surface or bonding a reinforcing material.

[0013]

[Embodiment of the invention]

 At least one hinge of a rectangular cylindrical storage frame (9) consisting of four side plates (2) is opened, and the required number of catalyst elements (1) are arranged in the frame (9). Alternatively, more catalytic elements (1) are bonded together to be integrated. Attach a reinforcing plate (5) made of ceramic plate or metal plate at an appropriate position on the outer periphery of the integrated catalyst element (1) with adhesive, etc., and install the reinforcing plate (5) on the retainer (3). Then, the catalyst element (1) is supported.

After the catalyst element (1) is installed, the opened side plates (2) are aligned, the hinge rod (6) is passed through the hinge pipe (7), and the hinge is closed as specified.

It is preferable that the shape of the reinforcing plate (5) is an L-shaped vertical cross section. The position of the catalyst element (1) can be easily determined by bonding the L-shaped reinforcing plate (5) to the lower end corner of the catalyst element (1). Further, a gap is formed between the retainer (3) and the catalyst element (1), and the influence of the retainer (3) on the gas flow can be reduced at the inlet of the catalyst element (1).

It is also preferable to cut out the middle part of the horizontal part of the L-shaped reinforcing plate (5). Thereby, the resistance to the gas flow can be reduced.

The shape of the reinforcing plate (5) may not be L-shaped, but may be a flat plate with a positioning claw.

The reinforcing plate (5) may be bonded to the catalyst element (1) either before or after the side reinforcement of the catalyst element (1). Reinforcement of the side surface of the catalyst element (1) may be performed on either the catalyst element (1) individually or the integrated catalyst element (1). Further, the reinforcing plate (5) may be either on the side surface of the catalyst element (1) or between the plurality of catalyst elements (1).

When the strength of the side surface of the catalyst element (1), that is, the bonding surface is low and sufficient bonding strength cannot be obtained, a curing agent may be applied to the side surface or a reinforcing material such as glass fiber, cloth, or paper may be used. It is also preferable to adhere and reinforce the side surface.

Embodiment 1 In the attached FIG. 1, a hinge rod (6) is connected to a hinge pipe at three hinge connection portions of a rectangular cylindrical storage frame (9) composed of four side plates (2) connected by hinges. Remove from (7), open the three hinges, and remove the two side plates (2) from the storage frame (9). Each side plate (2) is made of a rectangular carbon steel plate, and a cushioning material (8) is attached to the inner surface. A retainer (3) is arranged at the bottom and top of the storage frame (9), and the lower end and upper end of the side plate (2) are fixed to the side surface of the retainer (3) with bolts and nuts (4) or rivets. I do. A required number of catalyst elements (1) having a ceramic reinforcing plate (5) bonded at a predetermined position on the peripheral surface are arranged between the remaining side plate (2) and the retainer (3). The catalyst element (1) is bonded and integrated. Return the removed side plate (2) to its original position, tighten it with bolts and nuts (4) or rivets, insert the hinge rod (6) into the hinge pipe (7) and close the three hinges to complete modularization.

Example 2 When the required strength of the catalyst element (1) cannot be obtained, the side surface of the catalyst element (1) is reinforced by bonding glass fibers to the same surface. Other configurations are the same as those of the first embodiment.

Example 3 In FIG. 2 of the accompanying drawings, the shape of the ceramic reinforcing plate (5) is L-shaped in vertical section. The L-shaped reinforcing plate (5) is arranged at the lower corner of the catalyst element (1), and the horizontal part is along the lower surface of the catalyst element (1), and the reinforcing plate (5) is bonded to the catalyst element (1). I do. This facilitates the positioning of the catalyst element (1). Further, a gap is formed between the retainer (3) and the catalyst element (1), so that the influence of the retainer (3) on the gas flow can be reduced at the inlet of the catalyst element (1).

Embodiment 4 In FIG. 3 of the accompanying drawings, the shape of the ceramic reinforcing plate (5) is L-shaped in vertical section, and the middle part of the horizontal portion of the L-shaped reinforcing plate (5) is notched. By forming the notch (10), the resistance to the gas flow can be reduced.

[0024]

[Effect of the invention]

 In this catalyst module, a catalyst element (1) is held on retainers (3) (3) by a reinforcing plate (5). Therefore, there is no need to measure the dimensions of each member as in the case of the conventional catalyst block and adjust the dimensions so as to obtain a predetermined tightening force. The compression amount of the cushioning material (8) only needs to consider the gas sealing performance and the load during transportation.Therefore, the compression amount and compression of the cushioning material (8) are required to support the catalyst element (1) by the tightening force. The dimensional adjustment is easier than the control by the reaction force. Further, the compression amount of the cushioning material (8) can be adjusted without being affected by manufacturing tolerances of the catalyst element (1) and the storage frame (9).

Further, even when there is a difference in thermal expansion between the catalyst element (1) and the storage frame (9), the catalyst element (1) is supported by the retainer (3) so that the cushioning material (8) can be used. Since the required surface pressure is small, the compression amount can be adjusted so that the compression amount of the cushioning material (8) becomes appropriate even after thermal expansion.

The reinforcing plate (5) attached to the catalyst element (1) is placed on a grating-like member (retainer) to improve the supporting force of the catalyst element (1). The cushioning material (8) between the catalyst element (1) and the side plates (2) and (2) aims to absorb the reduction in sealability due to manufacturing tolerances and thermal expansion differences. It is not necessary to manage the amount of compression.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a modular catalyst of Example 1.

FIG. 2 is a vertical sectional view showing a modular catalyst of Example 3.

FIG. 3 is a perspective view showing a modular catalyst of Example 4.

[Explanation of symbols]

 1: Catalyst element 2: Side plate 3: Retainer 4: Bolt / nut 5: Reinforcement plate 6: Hinge rod 7: Hinge pipe 8: Buffer material 9: Storage frame 10: Notch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Akira Omori 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi Inside Tachibashi Shipbuilding Co., Ltd. (72) Ryoichi Komaru 1-7-1, Minami Kohoku, Suminoe-ku, Osaka-shi No. 89 Nippon Shipbuilding Co., Ltd. (72) Inventor Masayoshi Ichiki 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi (72) Inventor Masao Wada 1-7 Minami Kohoku, Suminoe-ku, Osaka-shi No. 89 Nippon Shipbuilding Co., Ltd. (72) Inventor Katsuichi Mohri 1-89, Minami Kohoku, Suminoe-ku, Osaka City

Claims (6)

[Utility model registration claims] 1. A cushioning material (8) is attached to the inner surface of a rectangular cylindrical storage frame (9) consisting of four side plates (2) connected by a hinge, and at least one hinge portion of the storage frame (9). Open the storage frame
Place the required number of catalytic elements (1) in (9), and
A modularized catalyst with four side plates (2) of the storage frame (9) tightening the catalyst element (1), fixing the four side plates (2) to the retainer (3), and closing the opened hinge part A modular catalyst comprising: a reinforcing plate (5) attached to a catalyst element (1); and the catalyst element (1) and the reinforcing plate (5) supported by a retainer (3). 2. The modularized catalyst according to claim 1, wherein a required number of catalyst elements are integrated. 3. The modular catalyst according to claim 1, wherein the retainer is disposed immediately below the reinforcing plate, and the catalyst element is supported by the retainer. 4. The modular catalyst according to claim 1, wherein the reinforcing plate has a vertical L-shaped cross section. 5. The L-shaped reinforcing plate (5) according to any one of claims 1 to 4, wherein the shape of the reinforcing plate (5) is L-shaped with a vertical section, and an intermediate portion of a horizontal portion of the L-shaped reinforcing plate (5) is cut off. Modular catalyst. 6. The modular catalyst according to claim 1, wherein the side surfaces of the catalyst element are reinforced by applying a hardening agent to the same surface or bonding a reinforcing material.