| 摘要 |
<P>PROBLEM TO BE SOLVED: To recover a low-water-content solvent by removing water when a solvent gas in an effluent gas discharged from a dryer for performing drying by vaporizing a solvent is cooled and condensed after it is concentrated to a concentration which is equal to or below the explosive limit of the solvent. <P>SOLUTION: Dry air is fed into a solvent drying chamber 1 from one side and is discharged from the other side. Part of the effluent gas is returned to the drying air fed into the solvent drying chamber 1 through a damper 5 to thereby increase the concentration of the solvent contained in the effluent gas to a concentration equal to or below the explosive limit of the solvent, and the effluent gas is cooled to a temperature at which the solvent contained therein is not condensed but the water vapor is condensed in the first cooling section of a heat exchanger 8 to separate and remove the water from the effluent gas. The effluent gas is further cooled to a temperature at which the solvent contained therein is condensed in the second cooling section of a condenser 10 to separate the solvent from the effluent gas. The effluent gas devoid of the solvent is heated and then fed as the dry air into the solvent drying chamber 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
