Abstract The invention resides in dust collecting apparatus combining the principles of so-called ''''dry-cyclone'''' and ''''wet-cyclone'''' dust collectors, subjecting dust-laden air or gas successively to centrifugal action first in a ''''dry-phase'''' vortex during which relatively large entrained particles, particularly together with some of the smaller ones are ejected from the air or gas stream which then enters a ''''wet-phase'''' vortex coaxial with the ''''dryphase'''' one into which a liquid is introduced and broken into a spray or mist to dampen and coagulate the smaller dust particles and effect their centrifugal separation in a sludge or slurry whereby substantially all solid particles are extracted from the air or gas before its discharge from the apparatus.
Apparatus as defined in claim 1 in which the liquid supplying means cooperate with said conduit to define an annular port for passage of gaseous fluid, said means terminating adjacent said port to provide a passage in said conduit of larger transverse area than said port.
Claim 2
Dependent Claim
33 words
Apparatus as defined in claim 1 including means providing a passage for conducting particle containing liquid from the downstream end of said conduit to the upstream end thereof for repassage through said conduit.
Claim 3
Dependent Claim
30 words
Apparatus as defined in claim 1 in which said liquid supplying means include means defining with said conduit an annular port for discharge of liquid radially inwardly into said conduit.
Claim 4
Independent Claim
135 words
The method of separating from a stream of gaseous fluid solid particles carried thereby which comprises introducing the gaseous fluid stream vortically into a substantially cylindrical chamber to thereby project against the substantially cylindrical wall of said chamber relatively coarse solid particles carried thereby, collecting said relatively coarse solid particles in dry condition at one end of said chamber, then introducing the gaseous fluid stream vortically into a substantially cylindrical conduit coaxial with said chamber while discharging a liquid by induction into the vortical gaseous fluid stream while in said conduit whereby solid particles and liquid are deposited on the inner wall of said conduit and carried axially along said wall by the vortical flow of said gaseous fluid stream, and separating said liquid and the solid particles carried thereby from said gaseous fluid stream.
Claim 5
Dependent Claim
32 words
The method defined in claim 5 wherein a portion of said liquid carrying in suspension therein solid particles is reintroduced from the down stream end to the upstream end of said conduit.