METHOD FOR PROCESSING ORGANIC SOLVENT-CONTAINING AIR

Abstract

A method for processing an organic solvent-containing air is disclosed. The method can be operated in spite of a rapid fluctuation of the concentration of the organic solvents in the air to be processed, specifically, the method does not increase the organic solvent content in the air to be emitted into the atmosphere after processing, even if the concentration of the organic solvents rapidly changes. The method comprises carrying out simultaneously and continuously an adsorbing-removing step, a regenerating step, and a combustion step, while mixing a purified air produced in the adsorbing-removing step with an exhaust gas from a combustion furnace produced in the combustion step, and decomposing the organic solvents in the mixture by oxidation.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flow chart showing an embodiment of carrying out the method for processing an organic solvent-containing air of the present invention.

FIG. 2 is a schematic diagram showing an adsorbing member installed in an adsorber.

FIG. 3 is a flow chart showing an embodiment of the method for processing an organic solvent-containing air of the present invention, in which an exhaust gas from a combustion furnace is returned as a regeneration air.

FIG. 4 is a flow chart showing a conventional method for processing an organic solvent-containing air.

Claims

1. A method for processing an organic solvent-containing air comprising carrying out simultaneously and continuously an adsorbing-removing step comprising removing the organic solvents in the air by causing the air to flow through an adsorbing member, a regenerating step comprising regenerating the adsorbing member by causing a regeneration air to flow though the adsorbing member which has adsorbed the organic solvents, and a combustion step comprising feeding an organic solvent-concentrated air produced in the regeneration step to a combustion furnace and burning the organic solvents in the concentrated air, while mixing the purified air produced in the adsorbing-removing step with the exhaust gas from the combustion furnace produced in the combustion step, and decomposing the organic solvents in the mixture by oxidation.

2. A method for processing an organic solvent-containing air according to claim 1, comprising introducing an external air into the combustion furnace and mixing with the exhaust gas of the combustion furnace and, at the same time, extracting a part of the exhaust gas from the combustion furnace, and returning the extracted gas as the regeneration air.