JPS6244746Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to catalyst blocks, and more particularly to improvements in catalyst blocks packed in stacks in gas vertical flow reactors.

In dry denitrification equipment, particularly parallel flow type dry denitration equipment, which performs a denitrification reaction of ammonia and the like in exhaust gas containing nitrogen oxides, a large catalyst layer is formed and used mainly in a vertical flow type dry denitrification equipment.
As a method for forming this catalyst layer, there is a method in which a plurality of catalysts in a plate shape or other shapes are formed into blocks and stacked.

Although this method makes it easy to form a catalyst layer, unless the catalyst blocks are assembled firmly together, the catalyst blocks may move due to gas flow, earthquakes, or other vibrations, and in severe cases, the catalyst layer may be damaged. It may collapse. As a method to solve this problem, there are methods of bolting or welding vertically adjacent catalyst blocks.

However, the bolt-tightening method requires the installation of separate lugs for bolt-tightening, and also has the disadvantage that the entire catalyst layer becomes large because a space is required for attaching the lugs. On the other hand, the welding method has the disadvantage that the welded portion must be cut each time the catalyst block is replaced, making the replacement work of the catalyst block complicated and difficult.

The purpose of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide a catalyst block that can prevent the stacked catalyst blocks from shifting to provide a stable and strong assembly, and that also allows easy replacement of the catalyst blocks. It is about providing.

In short, the present invention skillfully utilizes the lifting lug of the catalyst block as a fixing fitting, and engages this lug with an engaging member attached to the lower end of the catalyst block adjacent to the upper part, thereby achieving the above purpose. This is what I did.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a lifting lug 2 is provided that projects above a cubic frame 1. As shown in FIG. Stoppers 4 are attached to the lower end sides of the frame members 3 that extend downward from the lifting lugs 2, respectively. Further, a plate-shaped or honeycomb-shaped catalyst unit 5 is housed within the frame 1, and an integral catalyst block 6 is formed. In the figure, g indicates the gas flow direction.

When the catalyst blocks 6 having such a configuration are stacked in a gas vertical flow reactor, after the catalyst blocks 6 shown in FIG. 1 are placed in the reactor, the lifting lugs 2 of this block are It abuts or adjoins the lower end of the frame member 3 of the catalyst blocks 6 stacked on top of each other, and engages with the side surface of the stopper 4. By stacking in this way, the second
As shown in the figure, the lifting lugs 2 of the lower catalyst block 6 are engaged with the lower frame portion 7, so that the catalyst block 6 does not move. Furthermore, Y in the figure
In the direction indicated by , the lifting lug 2 engages with the stopper 4 of the upper catalyst block 6, as shown in FIG. 3, so that the catalyst block 6 does not move.

Next, when replacing the catalyst block 6, since the upper and lower catalyst blocks are simply engaged with each other, the catalyst block 6 can be replaced simply by attaching a suitable lifting fitting to the lifting lug 2 and lifting the catalyst block 6 upward. Can be done. Therefore, complicated operations such as removing bolts and nuts and cutting welded parts become unnecessary.

As described above, according to the present invention, it is possible to prevent vertically stacked catalyst blocks from shifting in the horizontal direction, the catalyst blocks can be easily replaced, and a member for preventing the catalyst blocks from shifting is provided. Since no particular space is required, it is possible to obtain a catalyst layer in which catalyst blocks are closely stacked.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of the present invention, Figure 2 is an explanatory diagram showing how to prevent the catalyst block from shifting in the X direction in Figure 1, and Figure 3 is how to prevent the catalyst block from shifting in the Y direction in Figure 1. FIG. DESCRIPTION OF SYMBOLS 1... Frame body, 2... Lifting lug, 3... Frame member, 4... Stopper, 5... Catalyst unit, 6
...Catalyst block.

Claims (1)

[Scope of utility model registration request] The frame includes a frame housing a catalyst unit, a lifting lug protruding above the frame, and an engaging member fixedly installed at the bottom of the frame, and the frames housing catalysts are stacked vertically. 1. A catalyst block characterized in that a lifting lug of a lower frame engages with an engaging member fixed to an upper frame when the catalyst block is opened.