Apparatus for the recovery of solvent vapor from an air stream

Details Apparatus for the recovery of solvent vapor from an air stream Apparatus for the recovery of solvent vapor from an air stream

1988-08-08

1989-07-25

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 80, 34 27, 68 18C, 68 18F, F26B 2106

Patent

active

048501190

ABSTRACT:
An apparatus for recovery of a solvent gas involved in the drying of goods treated with an organic solvent with the aid of an air stream in a dry-cleaning machine. In this machine the goods are dried by an air flow circulating in a closed circulation loop which is heated before contact with the goods and after contact is again cooled for condensation of solvent vapor. In a second stage of the recovery, the socalled reduction stage, the goods are cooled by shutting off the heat. For recovery of the residual solvent vapor still remaining in the air after cooling the air stream is subsequently fed through an adsorption unit. During the cooling only a portion of the cooled air is supplied for adsorption and after that is fed back in the air circulation loop circulating over the goods. This has been accomplished by providing a circulation branch having an adsorption unit substantially parallel to a portion of the circulation loop and an additional blower. The pipe connected with the entrance of the adsorption unit guiding the flow from this second blower is connectable to the circulation loop downstream of the air cooler in the vicinity of the entrance of the air stream to the processing container.

REFERENCES:
patent: 4074984 (1978-02-01), Fuhring
patent: 4251923 (1981-02-01), Kuri
patent: 4282015 (1981-08-01), Bartoschek et al.
patent: 4769921 (1988-09-01), Kabakov et al.

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