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A method and apparatus for separating and recovering volatile solvents from exhaust air containing volatile solvents and water vapor, the method including passing the exhaust gas alternatively through one of two beds of molecular sieve packings composed of a material capable of adsorbing the water v

A method and apparatus for separating and recovering volatile solvents from exhaust air containing volatile solvents and water vapor, the method including passing the exhaust gas alternatively through one of two beds of molecular sieve packings composed of a material capable of adsorbing the water vapors therein and then through one of two beds of molecular sieve packings composed of a material capable of adsorbing the solvent vapors therein. Heated air or inert gas is passed through the beds not being used to adsorb either the water vapor or the solvent vapors so as to regenerate the molecular sieve packings. The air or inert gas containing solvent is passed through a condenser and a drip collector so as to recover the solvent therefrom.

대표청구항 ▼

A method of continuously separating and recovering solvent vapors from exhaust air containing solvent vapors and water vapor, said method including the steps of (1) providing a pair of beds of molecular sieve packings composed of a material capable of adsorbing the water vapor in said exhaust air, (

A method of continuously separating and recovering solvent vapors from exhaust air containing solvent vapors and water vapor, said method including the steps of (1) providing a pair of beds of molecular sieve packings composed of a material capable of adsorbing the water vapor in said exhaust air, (2) providing a pair of beds of molecular sieve packings composed of a material capable of adsorbing the solvent vapors in said exhaust air, (3) passing said exhaust air in a first direction throug a first of said pair of beds provided in step (1) so that the water vapor in said exhaust air will be adsorbed on the molecular sieve packings therein, thereby providing a water vapor-free exhaust air, (4) passing said water vapor-free exhaust air in a first direction through a first of said pair of beds provided in step (2) so that the solvent vapors in said water vapor-free exhaust air will be adsorbed on the molecular sieve packings therein, (5) discontinuing step (3), (6) passing said exhaust air in a first direction through a second of said pair of beds provided in step (1) so that the water vapor in said exhaust air will be adsorbed on the molecular sieve packings therein, thereby providing a water vapor-free exhaust air, (7) simultaneously with step (6), passing heated air or inert gas through said first of said pair of beds provided in step (1) in a second direction opposite to said first direction so as to remove the water adsorbed on the molecular sieve packings therein, (8) discontinuing step (4), (9) passing said water vapor-free exhaust air in a first direction through a second of said pair of beds provided in step (2) so that the solvent vapors in said water vapor-free exhaust air will be adsorbed on the molecular sieve packings therein, (10) simultaneously with step (9), passing heated air or inert gas through said first of said pair of beds provided in step (2) in a second direction opposite to said first direction so as to remove the solvent adsorbed on the molecular sieve packings therein, (11) discontinuing step (6) and then repeating step (3), (12) simultaneously with step (11), passing heated air or inert gas through said second of said pair of beds provided in step (1) in a second direction opposite to said first direction so as to remove the water adsorbed on the molecular sieve packings therein, (13) discontinuing step (9) and then repeating step (4), and (14) simultaneously with step (13), passing heated air or inert gas through said second of said pair of beds provided in step (2) in a second direction opposite to said first direction so as to remove the solvent vapor adsorbed on the molecular sieve packings therein.