Abstract: In a filter cartridge for insertion in a housing for the removal of combustible substances from exhaust gases, with a regeneration of the charged filter material by combustion of the substances, the filter consists of a metallic fiber mat welded together so as to form a hollow cylinder which is disposed tightly on an electrically conductive lattice structure. The ends of the hollow filter cylinder are compressed and tightly held, by metal sleeves, in engagement with a cartridge head and a cartridge foot structure and they are welded together by an end face weld seam. Current is supplied to the filter cylinder by way of the cartridge head and foot structure for heating the filter cylinder directly so that the combustible substances collected on the inside of the filter cylinder are efficiently burnt.

Abstract: A filter assembly includes a frame shaped generally as a circular cylinder and having an inlet opening at one end for orienting fluid axially; and a plurality of filter elements arranged in a circular array about the frame and being supported thereby. The filter elements are arranged for allowing passage of fluid therethrough radially outwardly. The circumferentially adjoining filter elements define a space therebetween. Angled spacer elements bridge and maintain the space between any two adjoining filter elements. Each filter element is sealed relative to the frame. The filter elements constitute interconnected blocks of a single filtering unit formed of a continuously folded strip-like filter material, and adjoining blocks of the filtering unit are angled to one another to present a polygonal pattern as a whole, whereby the flanking blocks of the filtering unit are in a contacting relationship and free ends of the filter material in the flanking blocks are bonded to one another.

Abstract: An apparatus for detecting iodine isotopes in the exhaust gas of a nuclear installation includes a duct for a partial exhaust gas stream, which duct includes an absorption chamber which is disposed in a radiation shielding structure and through which the exhaust gas flows and which has associated therewith means for admitting absorption material and for removing it therefrom. Radiation detectors are supported in the radiation shielding structure at opposite sides of the absorption chamber for monitoring radiation of iodine isotopes collected therein, the cavity in the shielding structure in which the absorption chamber is disposed being larger than the absorption chamber and the absorption chamber being supported so as to be movable in the cavity relative to said detectors to permit calibrating the apparatus.

Abstract: In a mist collector for separating drops of liquid from a gas or vapor stream and including a cylindrical housing and metal fiber webs mounted in an annular configuration in the housing and arranged to be penetrated by the stream in the radial direction of the housing, the metal fiber webs are composed of a plurality of cylindrical layers spaced apart from one another in the radial direction and the collector is provided with stream conducting elements positioned and arranged with respect to the housing for causing the stream to flow through the layers in a radial inward direction.