| 摘要 |
A filter or catalyst apparatus in which a fluid medium is brought in a housing as completely as possible into contact with the surface of an arrangement disposed in the housing, the arrangement having openings in the direction of flow of the medium, wherein the arrangement comprises stationary parts (24; 124; 224) and movable parts (22; 122; 322) and the fluid medium is so guided that it flows alternately through respective stationary parts (24; 124; 224) and moved parts (22; 122; 322) of the arrangement, and a catalyst apparatus by which a fluid medium, preferably gas, is brought into contact with a catalytic substance, by said medium flowing through a carrier body (409; 425; 439) for the catalytic substance, wherein the carrier body (409; 425; 439) includes grills or apertured plates which carry the catalytic substance and through which the fluid medium flows, and there is provided a drive device (408; 432) which moves the grills or apertured plates perpendicularly to the direction of flow of the fluid medium.
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