Drying device

Abstract

A drying device in which temperature and humidity of a gas flow fed into each of plural helical dryers in the form of a cylinder (i.e., temperature and humidity of an exhausted gas flow) can be each controlled independent of the other dryers. The drying device, is equipped with a casing. The casing includes therein at least a helical dryer 6 in the form of a cylinder for exhausting a drying gas flow fed therein out of gas distributed on its outer periphery to feed on a drying object, and an axial-flow blower 5 connected to an entrance side of the helical dryer for inspiring a gas flow exhausted out of the helical dryer into the casing inside the same casing and feeding into the helical dryer again to circulate said gas flow, in which a part of a gas flow inspired by the axial-flow blower serves as a gas flow having a depressed dew point which results from splitting a gas flow exhausted out of the helical dryer and depressing the dew point of the split gas flow in a dehumidifying facility 1 located outside the casing.

Dependencies are inferred from the claim text.