Dryer for humid compressed gases

摘要

A humid compressed-gas dryer comprises a plate-type heat-exchanger that includes a plurality of stacked plates (2) associated to each other in a gas-tight manner all along the perimeter of adjacent plates (2), said adjacent plates (2) defining channels (3) therebetween for two or more fluids to be guided therethrough in a heat-exchange relation, said plates (2) having a plurality of apertures (4, 15-21) in a mutually aligned arrangement to define fluid conduits that extend through the heat-exchanger in a fluid communication with said channels (3). Said plates (2) are each formed of an aluminium sheet having a smooth surface and a corrugated aluminium fin (5) is provided between adjacent sheets defining said channels. The fin (5) comprises corrugations associated to the smooth surface of said sheets by brazing. The heat-exchanger comprises a heat recovery section (12) adapted to pre-cool a humid compressed gas, and a cooling section (13) adapted to cool down said pre-cooled humid compressed gas until it reaches a pre-established dew point.