PURPOSE: To diminish the spacings between honeycomb catalysts and a metallic outside frame and to suppress the outflow of gases by housing catalyst moldings into metallic inside frames to form a unit and building the unit into the outside frame to form a block.
CONSTITUTION: The honeycomb catalysts 1 are housed into the unit frame body 4 consisting of a thin steel sheet, the ends of which are formed to an L shape by pressing as stoppers 4a for preventing the deviation of the catalysts by packing buffer materials 5 around the catalysts to form the catalyst unit 2. The coefft. of linear expansion of the inside frame body 4 varies from the coefft. of linear expansion of the catalyst moldings 1. Plural pieces of these units 2 are stacked and the stacked units are packed into the outside frame 3 consisting of the formed steel sheets 3 to form the catalyst block. The dimensional tolerances in the production of the catalysts and the spacings by the difference in the linear expansion between the frame bodies and the catalysts during running are dispersed when the block is inserted to the horizontal stream type reactor.
ISHIKAWA TOMIHISA
MORITA ISATO
MUKAI MASATO
