APPARATUS AND METHOD FOR TREATING SOLVENT GAS

摘要

PROBLEM TO BE SOLVED: To reduce the load to an adsorbing column to miniaturize an apparatus by sending a part of raw gas to the adsorbing column as desorbing gas to reduce the gas sent to the adsorbing column in an apparatus removing a solvent from the org. solvent-containing exhaust gas discharged from a factory to discharge the exhaust gas as purified gas. SOLUTION: The raw gas introduced into an adsorbing column 1 from a raw gas introducing passage 5 is countercurrently brought into contact with the adsorbent 12 fluidized in a multistage fluidized bed 4 to adsorb the solvent in the raw gas by the adsorbent 12 and purified gas is discharged from a discharge port 6. The adsorbent 12 having the solvent adsorbed thereby is moved to the lowermost stage and subsequently transferred to the upper part of the desorbing column 2 through an adsorbent transfer passage 7. A part of the raw gas is heated by a heat exchanger 16 and allowed to flow into a desorbing column 2 as desorbing gas from a desorbing gas introducing passage 10 and the adsorbent 12 is heated by the desorbing gas to desorb the solvent. The gas after desorption containing the desorbed solvent in high concn. is heated by a combustion device 3 to be decomposed to a harmless inorg. substance.