Title:
METHOD FOR RECOVERING SOLVENT AND DEVICE THEREFOR
Document Type and Number:
Japanese Patent JP3069578
Kind Code:
B2
Abstract:
PURPOSE: To reduce a load of an adsorption element and to enhance the working efficiency of the device in the device in which steam is supplied to the adsorption element to desorb gas by replacing the gas filling the space between a desorbed gas outlet and the element by steam prior to desorption.
CONSTITUTION: A gaseous org. solvent having a relatively low b.p. is adsorbed on an ACF 2 (activated carbon fiber) to clean a waste gas. In this case, the solvent-contg. gas is firstly adsorbed on the ACF 2, and the cleaned air is discharged outside the system. Steam is then supplied to the space between a desorbed gas outlet 6 and the ACF 2 to drive out the solvent-contg. air, and the gas is replaced with the steam. the solvent-contg. air is supplied to an adsorption stage through a condenser 3, and the solvent is adsorbed and separated. The solvent adsorbed on the ACF 2 is desorbed, and the desorbing steam is regenerated and used in the ACF 2. The steam contg. the desorbed solvent and a part of the air in the kettle are then discharged outside the system and cooled in the condenser 3, and the uncondensed gas is supplied to the adsorption stage.
Inventors:
Mikio Akamatsu
Kenji Seki
Kenji Seki
Application Number:
JP31764994A
Publication Date:
July 24, 2000
Filing Date:
November 28, 1994
Export Citation:
Assignee:
Toho Kakoh Construction Co., Ltd.
International Classes:
B01D53/34; B01D53/04; B01D53/44; B01D53/81; B01J20/20; B01J20/34; (IPC1-7): B01D53/44; B01D53/04; B01D53/34; B01D53/81; B01J20/20; B01J20/34
Domestic Patent References:
| JP606626A | ||||
| JP4137729U | ||||
| JP62170122U |
Attorney, Agent or Firm:
Yoshihiko Korai
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