JPS63296844A - Projection formed corrugated planar catalyst - Google Patents

Abstract

PURPOSE:To perform the molding of corrugation and that of projections by one machine, by simultaneously forming the corrugation for increasing the contact reaction area with gas and the projections having spacer function to the front and back surfaces of a planar catalyst. CONSTITUTION:Corrugation for increasing the contact reaction area with gas and projections 2, 2A having spacer function are simultaneously formed to the front and back surfaces of a plate-shaped catalyst 6. As a result, the molding of the corrugation 1 and that of the projections 2, 2A can be formed by one machine and a manufacturing apparatus becomes simple. In laminating the planar catalyst having this shape, ones having the same shape may be successively laminated while the directions thereof are alternately changed and, therefore, only by manufacturing one kind of a shape, the purpose for preparing the planar catalyst can be achieved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a protrusion-forming corrugated plate-shaped catalyst, and in particular, a protrusion-forming corrugated plate-like catalyst, in which corrugations for increasing the contact reaction area with gas and protrusions serving as spacers are simultaneously formed. This invention relates to a plate-shaped catalyst for exhaust gas denitrification.

[Conventional technology]

As shown in Fig. 11 and Fig. 12 (Japanese Patent Publication No. 59-35659), the conventional method for producing this type of plate-shaped catalyst is as follows.
A method of sequentially forming corrugations and chevrons on a flat plate IA with the front roll 11 and the rear roll 12, Figures 13 and 14 (
As shown in Japanese Patent Publication No. 59-321.83), there are foot-shaped rolls in the front and rear stages]1. A and 1.2B, similarly forming corrugations and chevrons, U.S. Patent Application No. 35
As shown in Japanese Patent No. 6754, a method is known in which a corrugated plate-shaped catalyst is press-molded to successively form a mountain shape.

However, the methods shown in Figures 11 and 12 require two machines because the corrugations and chevrons are formed using separate equipment, and there is a problem in synchronizing the front and rear machines. The method described in the patent uses press forming, so as the number of threads increases, the processing die must be lengthened, and there is also a limit to the length of the die, which causes the problem that the processing speed (feed rate) must be reduced. In addition, if a waveform was to be formed, it was necessary to install a waveform forming machine before press forming. As shown in Fig. 14, in order to stack the products formed by the method shown in Fig. 13, it is necessary to alternately stack the chevron-shaped and flat-shaped corrugated catalysts. Therefore, when manufacturing on the same line, it is necessary to change the stages. Is required. Furthermore, if they are manufactured on separate lines, two lines of manufacturing equipment will be required.

[Problem that the invention seeks to solve]

It is an object of the present invention to solve the above-mentioned conventional techniques, to form protrusions that do not require separate equipment for forming waveforms and for forming chevrons, to simplify the manufacturing equipment, and to form protrusions that can be formed using a single plate-shaped catalyst when stacking. An object of the present invention is to provide a corrugated plate-shaped catalyst.

[Means for solving problems]

The above object is achieved by simultaneously forming corrugations and protrusions on the front and back sides of a plate-shaped catalyst by a roll forming method using a roll having a combination of corrugations and protrusions. That is, the present invention is characterized in that corrugations for increasing the contact reaction area with gas and protrusions serving as spacers are simultaneously formed on the front and back surfaces of the plate-shaped catalyst.

[Effect]

By performing simultaneous molding using a roll having corrugations and protrusions, the corrugations for increasing the reaction surface area of the plate-shaped catalyst and the protrusions serving as spacers during the fi'j layer can be formed using one mechanical device. In addition, when stacking plate-shaped catalysts of this shape, the same-shaped catalysts can be stacked one after another by alternating their orientations, so the purpose of producing plate-shaped catalysts can be achieved just by manufacturing one type of shape. can do.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of the plate-shaped catalyst of the present invention;
FIG. 2 is a detailed view of section A in FIG. 1.

As shown in the figure, this plate-shaped catalyst 6 is composed of a corrugated portion 1 for increasing the contact reaction area with gas, and a row of protrusions 2.2A that serve as a spacer during stacking. In addition, a stacking diagram of this plate-shaped catalyst is shown in FIG. 9, and A-A in FIG.
A perspective view is shown in FIG.

It can be seen that the protrusions 2.2A serve as spacers above and below the plate-shaped catalyst.

Figures 8A to 8C show a roll forming method for the plate-shaped catalyst of the present invention. The corrugated roll 7 is provided with a large number of protrusions 2OA and recesses 2OB corresponding to the protrusions 2.2A. This”−
1 in the direction of the arrow while supplying polyethylene sheets 1-5 for protecting the catalyst surface together with the plate-shaped catalyst 6 to the upper and lower sides of the plate-shaped catalyst 6 to the lower two stages of corrugated protrusion forming rolls 7.
By rotating the lower roll, the corrugations and protrusions are simultaneously formed.

According to the above embodiment, by using the corrugated projection forming roll 7, the corrugations 1 have the purpose of increasing the contact reaction area with the gas, and the protrusions have the purpose of maintaining the distance between the plate-shaped catalysts during stacking. It became possible to simultaneously mold both.

The plate-shaped catalyst of the present invention is used in a 4-hif condition as shown in FIGS. 9 and 10. In addition, Figure 9,! @ Figure 10 does not show waveforms.

FIG. 7 is an explanatory diagram of a plate-shaped catalyst manufacturing facility incorporating the corrugated protrusion forming roll of this example. In this equipment, a catalyst coating roll 3, a corrugated protrusion forming roll 7, and a cutting machine 8 are arranged in series, and the steps of coating, shaping, and cutting the plate-shaped catalyst 6 are performed continuously. During coating, paper or polyethylene sheets 1-4 are interposed above and below the plate-shaped catalyst 6 to prevent the catalyst components from adhering to the coating roll 3.
Finish the catalyst surface smoothly. At the time of forming the corrugated projections, a polyethylene sheet or kraft paper 5 is interposed above and below the plate-shaped catalyst to compact the catalyst component and prevent the catalyst component from falling off and adhering to the forming roll. Next, the plate-shaped catalyst of the present invention is obtained by cutting into a predetermined size using a cutting machine 8.

Next, FIG. 3 is a perspective view of a plate-shaped catalyst showing another embodiment of the present invention, and FIG. 4 is a detailed view of part B thereof. This plate-shaped catalyst is
The waveform is not oblique to the entire catalyst, but is formed parallel to the longitudinal direction (gas flow direction). According to such a configuration, since the waveform of the plate-shaped catalyst is arranged in the gas flow direction, the gas flow is not detected, and the reaction contact surface area with the gas can be increased. In addition, the grooves for forming the waveform of the waveform protrusion forming roll are also formed in the grooves 8A as shown in FIG. 8B.
Rather than having a complicated shape as shown in the figure, it has a simple shape that can be finished with a lathe in the circumferential direction, so the processing of the corrugated protrusion forming roll is easy and can be done at low cost. Note that in FIG. 8, the convex portions and concave portions of the corrugated protrusion forming roll are omitted from illustration.

FIG. 5 is a perspective view of a plate-shaped catalyst showing still another embodiment of the present invention, and FIG. 6 is a detailed view of section C thereof. In this embodiment, as shown in FIG. 5, the waveform is formed right sideways (perpendicular to the gas traveling direction). The waveform protrusion forming roll at this time is shown in FIG. 8C. Note that in FIG. 8C, the projections and recesses of the protrusion forming roll are not shown. According to this embodiment, the grooves for forming the corrugations of the corrugated protrusion forming roll can be arranged linearly in the elongated direction as shown in FIG. 8C, so that the manufacturing and machining of the roll is easy.

〔Effect of the invention〕

According to the present invention, the corrugations and protrusions can be formed at the same time using a corrugated protrusion forming roll, the plate catalysts of the same shape can be laminated by alternating the orientation, and the production can be completed in one production line, thereby reducing equipment costs. It has the advantage of being able to do a lot of work, and because it is roll forming, the forming speed can be increased.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a plate-shaped catalyst showing an embodiment of the present invention;
2 is a detailed view of section A in FIG. 1, FIG. 3 is a perspective view of a plate-shaped catalyst showing another embodiment of the present invention, and FIG. 4 is a detailed view of section B in FIG. 3. , FIG. 5 is a perspective view of a plate-shaped catalyst showing another embodiment of the present invention, FIG. 6 is a detailed view of part 0 of FIG. 5,
FIG. 7 is an explanatory diagram showing an example of the production line configuration of the plate-shaped catalyst of the present invention, FIG. 8A is a perspective view of a forming roll used in the present invention, and FIGS. 8B and 8C are used in the present invention. FIG. 9 is a perspective view showing another example of a forming roll, FIG. 9 is a perspective view of laminated plate-shaped catalysts of the present invention, and FIG.
The perspective view and FIGS. 11 to 14 are diagrams for explaining known examples, respectively. ■... Waveform, 2.2A... Protrusion, 3... Coating roll, 4... Paper or polyethylene sheet, 5... Polyethylene sheet 1- or kraft paper, 6... Plate catalyst, 7... Waveform protrusion forming roll, 8... Cutting machine, 9
... Molding press, 10... Cutting blade, 11... Front roll, 12... Back roll, 2OA... Convex part, 2
0B...4 parts. Agent Patent Attorney Kawakita Take Cho A Kiichi) 77- Figure 11 Figure 12

Claims (1)

[Claims] (1) A protrusion-formed corrugated plate catalyst characterized in that corrugations for increasing the contact reaction area with gas and protrusions serving as spacers are simultaneously formed on the front and back sides of the plate catalyst.