Patent ID: 8337590

Claim:
A device for drying a gas, in particular air, which may contain various gaseous compounds, the drying having to make it possible to extract most of the water vapor present in the gas, without removing some of the other compounds present, or without modifying the content thereof, comprising at least one chamber, with an inlet for a gas flow to be treated and an outlet for the treated gas flow, this chamber being limited by at least one membrane, the water vapor permeability of which is substantially greater than its permeability with respect to other gases or vapors, a moisture-absorbing material being positioned, or circulating, against the membrane on the side opposite the chamber, the surface area of the chamber and of the membrane being determined, by taking into account the flow rate of gas and its assumed water vapor content, in order to ensure sufficient desiccation of the gas flow between the inlet and the outlet of the device, wherein it comprises: a stack of plates provided with central openings, except for the outermost plates which are closed, each chamber is formed by a central opening provided in a plate, this central opening being between two parallel membranes, whilst the moisture-absorbing material is provided against the membranes on the side opposite the chamber, a gas inlet channel and an outlet channel passing through the wall of the plate which surrounds the central opening, each plate defining a chamber for the passage of the gas is sandwiched between two plates comprising a housing for the moisture-absorbing material, and several chambers are stacked, and connected, in series.