Feedback of filtrate in gas filtration - has time cycle controlled by particle concentration measurement in return feed channel

摘要

In filtering gases, the filtration is carried out by several filters in parallel and filters are cleaned in sequence. To maintain high filtration efficiency after cleaning, part of the filtrate is returned to the inlet side of the filters for a time in order to build up a layer of material; this assists in maintaining the filtration efficiency of the system. Filtration efficiency is maintained high and uniform. (Provisional Basic previously advised in Week D29).