Abstract: A method and device for the drying of gas whereof a main flow (14) is passed through a drying zone of a regenerative moisture exchanger having a body (10) containing a bed of absorbent material. The bed is regenerated in a regenerating zone (26b, 26c) wherein a regenerant gas (18), heated outside said body, is passed through the bed counter-current to the main flow (14). After passing through the bed of the moisture exchanger (10) the regenerant gas is recirculated, without passing back through the bed, and is caused, after further heating (34) to pass through the bed via at least one further regenerating zone (26a, 26b).

Abstract: Device for a contactor (10) for liquid and gas, e.g. for use in cooling towers and the like, such contactor being built up of mutually spaced membranes (12, 14) forming ducts for the passage of a fluid introduced at the top of the contactor and collected in a trough or channels below the membranes. In order to be able to collect the liquid passing through the contactor immediately beneath the lower surface of the latter, thereby reducing the pumping height without appreciably affecting the flow conditions of the air passing through the contactor, the contactor (10) is provided with surfaces to carry of the liquid which are inclined at an angle relative to the horizontal and are connected to at least one collecting channel or trough (16), these surfaces serving to carry the liquid passing out of the contactor into the collecting channel (FIG. 1).

Abstract: A supply device for use in an evaporative contact body of the multi-layer type having gaps between the layers of the body to which water is supplied from above comprises water supply pipes having outlet openings formed therein. The pipes are in direct contact with the top of the contact body or may be embedded therein, and the pipe openings are located to direct water jets directly inside the gaps between the layers of the contact body.

Abstract: A method of producing a sorption body is disclosed in which a plurality of sheets of asbestos paper are formed from a fiber pulp having molecular sieves placed therein. The sheets are arranged in contact with one another at spaced points to form transectional channels therebetween for the media which are to pass through the body, with the sheets supporting each other. The assembled sheets are subjected to an increase in temperature sufficient to drive off the organic binding agents present in the paper and to break down the asbestos fiber to a powdery consistency.

Abstract: A method of manufacturing a contact body is disclosed wherein the contact body is built up of thin layers of hydrated asbestos fibers shaped between mutually spaced support positions to form channels extending from end to end of the contact body. The layers have a coating thereon of at least one inorganic substance and the layer body is heated to at least the dehydration temperature of the asbestos, at which the water of crystallization is released by passing a current of hot gas through the channels in the contact body for a relatively short period of time in order to effect the intended action on the body.

Abstract: A method of manufacturing a contact body for at least one flowing medium is disclosed wherein layers of asbestos fibers are formed and arranged so that the layers bear against one another at mutually spaced positions to provide channels in the body extending from one end thereof to the other to allow the flowing medium to pass therethrough. The layers of the contact body are first treated by supplying to the layers at least one inorganic substance which produces a hydrated precipitate on the asbestos fibers of the layers. Thereafter the layers are heated to a temperature which is at least within a temperature range at which the hydrated precipitate releases its water of crystallization, but which temperature is below the sintering temperature for the substances remaining in the body. As a further step, at least one further substance is supplied to the contact body layers which restores the mechanical strength of the body lost by the transformation of the asbestos fibers during the heating step.

Abstract: A method and apparatus provides conditioning of an air stream by cooling in a regenerative heat exchanger having two groups of channels separated from one another by walls through which heat exchange occurs. The air stream to be conditioned flows through one group of channels while an auxiliary air stream flows through a second group of channels the walls of which comprise wettable material maintained wet by means of water which is caused to evaporate by the auxiliary air stream to result in cooling. The wettable material provides a substantially stationary liquid layer maintained in the channels of auxiliary air flow so that evaporation takes place directly from the walls separating the two groups of channels to obtain high heat exchange efficiency.

Abstract: A method of manufacturing a contact body for at least one flowing medium is disclosed wherein layers of asbestos fibers are formed and arranged so that the layers bear against one another at mutually spaced positions to provide channels in the body extending from one end thereof to the other to allow the flowing medium to pass therethrough. The layers of the contact body are first treated by supplying to the layers at least one inorganic substance which produces a .[.hydrated.]. precipitate on the asbestos fibers of the layers. Thereafter the layers are heated to a temperature which is at least within a temperature range at which the .[.hydrated precipitate releases its.]. .Iadd.asbestos fibers release their .Iaddend.water of crystallization, but which temperature is below the sintering temperature for the substances remaining in the body.