Cleaning dirty particle-laden gas - by cleaning dirty gas direct from process and mixing with dirty gas escaping into air before secondary cleaning process

摘要

Method is used for cleaning a dirty particle-laden gas emanating from a process carried out in an enclosed environment and ventilating the environment of escaped dirty gas. Dirty gas is collected direct from the process to provide a first dirty gas stream of relatively high particle concentration. Dirty gas escaping into the environment is collected to provide a second dirty gas stream diluted with air from the environment to a relatively low particle concn. The first dirty gas stream is subjected to a primary gas cleaning operation. The first stream from the primary gas cleaning operation is mixed with the second stream, and the mixed stream are subjected to a secondary gas cleaning operation.