Rotating gas filter drum - prevents dusty gas escaping into clean gas space by downwardly directed diverted flow

摘要

Inside a rotating housing against which at least the heavier particles of dust in a gas stream are centrifugally applied, in cyclone fashion, to descend to a base collector is a rotating drum whose axial shaft is held between upper and lower bearings. The lower section of the drum is of porous gas-permeable material for filtering dust from gas flowing radially inwards. This porous section merges into an upper annular solid section surmounted by an inwardly tilted rim. Cleaned gas rises towards an upper outlet. To prevent dusty gas from the annular space between housing and drum being entrained with cleaned gas, part of the rising stream of filtered gas is branched off as a separate circulation whose downward arm resists the stream of dusty gas, using the pressure imparted by internal baffle plates. ADVANTAGE - Superior to known systems wherein the filter housing is dipped into a pool of sealing liq..