Abstract: A process and apparatus for continuously purifying gases by removing entrained burdening substances therefrom, wherein the gas is loaded with entrained substances is passed substantially radially through adsorbing material arranged about an axis of rotation as an adsorber bed, the substances being retained on the adsorbing materials in the course of their rotational movement about the axis of rotation, and in the course of further rotational movement the load of retained substances is desorbed, optionally after inertization, by flushing with a fluid medium, e.g., hot gases or steam, and the adsorbing material may then be cooled and/or dried. Rotational movement is preferably done intermittently, and the feed stream to and the drain stream from the adsorbing material each are conducted through a confined space extending at least in one direction substantially parallelly to the axis of rotation or to the adsorber bed, the confined space being fed and drained axially.

Abstract: The invention relates to a process and a plant for separating low density material, in particular plastics, in particular with a density of less than 1, from substrate mixtures, preferably from waste material fractions or presorted garbage fractions optionally containing essential portions of plastics or optionally presorted to paper/plastics fractions, wherein a gravity separation, in particular a sink-float separation, is carried out and the low density material phase, in particular polyolefin plastics, is withdrawn and optionally further processed as a separate fraction after drying.According to the invention, the separating effect and the cleaning of the low density material phase withdrawn are increased by carrying out at least one centrifugal separation, preferably in a hydrocyclone, in addition to at least one gravity separation, preferably in a sink-float basin.

Abstract: This invention relates to an improvement in a drying installation for treating a web of material including a drying hood having flow channels therein and heat sources and blowers for the circulation of a drying medium which is passed through apertures to said web and drawn off again through exhaust channels, the improvement comprising a plurality of profiled tube means mounted adjacent said web, the distances between said tube means constituting diffuser-like gaps serving as exhaust channels, and a plurality of apertures in said tube means directed toward said web, said apertures being in a triangular configuration and distributed over said tube means at a constant distance.

Abstract: This invention relates to an improvement in a discharge and draw-off device for driers of material webs including nozzle casings mounted transversely over the path of a web to be dried, and having discharge apertures in said casings for discharging a drying medium and interstices between said casings for drawing-off said medium, the improvement comprising a substantially V-shaped formation of rows of the discharge apertures, whereby a double whirl is produced whose flow spiral increases in the direction toward the draw-off openings.