| 摘要 |
<p>A method and a device for removing from a gas or vapour flow at least part of an ecologically unsound substance present therein, such as benzene, perchloroethylene or other hydrocarbons and/or solvents, wherein said gas or vapour flow is passed through a cooling room having a temperature which is at least substantially equal to or lower than the condensation temperature of the ecologically unsound substance, wherein a medium having a solidification temperature which is at least substantially equal to or higher than the temperature of the cooling room is introduced into the gas or vapour flow prior to and/or during the entry of said flow into the cooling room, and wherein the temperature in the cooling room is raised after a predetermined period and the gas or vapour flow is interrupted or diverted in order to liquefy and discharge the solidified medium and the ecologically unsound substance contained therein.</p> |
