Method and apparatus for solvent recovery

摘要

A method and apparatus for recovering a contaminant solvent from a gas such as air or the like. Contaminated air or gas to be treated is initially directed through a first absorber containing an oil which absorbs the solvent to cleanse the gas. The air or gas may then be returned to the environment. The oil is transferred to a stripper, where inert gas passing therethrough absorbs the solvent to cleanse the oil. Condenser means adapted to receive inert gas outputted from the stripper facilitates recovery of the solvent. The inert gas is further cleansed in an auxiliary oil absorber and from thence passes to an activated charcoal filter which removes remaining traces of solvent from the inert gas through the process of adsorption. Cleansed inert gas is then recycled by returning it to the stripper for repetition of the process. Absorbent oil is also recycled by continuously pumping it between the stripper and the absorbers.