BACKFLUSHING AND SELF-CLEANING FILTERS

Most filter elements, including all of those described in Sections 3K and 3L, are intended to be cleaned free of accumulated contaminants, wherever this is pos sible, simply from the economic viewpoint of avoiding waste. This is done either by
removal from their housings for cleaning in another place, or by cleaning in situ, but only after stopping the flow of process fluid through them.

Primarily, the backflushing/cleaning process is employed to maintain a dirt removing filter in good working order. However, it is also used to recover solids collected on the element surface, when that is the purpose of the filter (in some baghouses, for example, or in pressure leaf or plate filters). These process applications are described in the place appropriate to these filters, and this part of Section 3 deals with the cleaning of clarifying (contaminant removal) filters.

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