Centrifugal chamber filter for separating solids from a gas stream

Claim 1

A filter for separating, by centrifugal force, solids suspended in a gas stream, the filter being of the kind having parallel flow channels and a plurality of centrifugal chambers each of which adjoins a flow channel with a trailing edge and a leading edge and between these edges is open to the flow channel over part of its wall area; each chamber having two outlet pipes therein which are disposed coaxially in the chamber, which extend towards each other from the end walls of the chamber and which are connected to a purified gas outlet, the filter comprising a plurality of separate multi-stage filter elements in each of which there is at least one of said flow channels and a plurality of said centrifugal chambers communicating with the flow channel, the cross-sectional area of the flow channel reducing from chamber to chamber according to the desired flow velocity, the filter element having an inlet and an outlet in respective end walls of the filter element, the filter also comprising a filter housing; two opposite walls spaced apart in said filter housing and between which said filter elements are located, said opposite walls having passages therein with which the respective inlets and outlets of the flow channels of the filter elements communicate, the filter housing having at least one purified gas outlet communicating with the space within the filter housing between said opposite walls therein and through that space with the outlet pipes of the centrifugal chambers of the filter elements and having outside one of said opposite walls a crude gas inlet communicating with the inlets of the flow channels of the filter elements and outside the other of said opposite walls a residual gas outlet communicating with the outlets of the flow channels of the filter elements.