ROTARY VACUUM PRECOAT FILTERS
PRE COAT DISCHARGE
The EIMCO-K.C.P. Pre-coat drum filters are coated with a bed of diatomaceous earth or similar material. During cycling a clear filtrate is obtained. When vacuum is applied, the liquid is drawn through the pre-coat material, and solids deposited on the pre-coat surface are removed along with a thin portion of the pre-coat by an advancing scraper blade, as the drum revolves.
The blade operates independently of the drive to provide a “precision lathe: movement. Depending on the movement of the blade the drum can operate up to a week without retracting the blade to apply a new pre-coat bed.
Pre-coat filters are recommended when small amounts of solids are to be removed from large volumes of liquids, for clarification or polishing of effluent, or for the filtration of material that produces sticky solids.
They provide a high clarity of filtrate when the filtrate is the valuable product and the cake is to be discarded.