Dust collector including diffuser assembly

Claim 2

In a dust collecting device wherein particulate matter borne by a gaseous carrier is separated therefrom, a plenum chamber containing means to effect the separation of said particulate matter from said gaseous carrier, an inlet conduit terminally connected to said plenum chamber for introducing a high velocity stream of particulate material bearing gaseous carrier therein, and a diffuser assembly disposed within said plenum chamber in the path of advance of said high velocity stream of particulate material bearing gaseous carrier, said diffuser assembly including a perforated plate member of perimetric contour corresponding to that of said inlet conduit but of lesser transverse extent thereof and having a perpendicular perimetric flange mounted thereon, and means positioning said perforated plate member in spaced coaxial relation with the terminus of said inlet conduit with said flange facing the flow of gaseous carrier and at a predetermined angle of inclination from perpendicularity to the longitudinal axis of the inlet conduit and to the flow of gaseous carrier bearing particulate matter emanating therefrom such as to avoid deflection of the portions of said gaseous carrier impinging upon the imperforate portions of said plate member toward said separating means and to subdivide a substantial portion of said gaseous carrier into a multiplicity of jets on the downstream side therEof peripherally encompassed by an annulus of unimpeded high velocity carrier gas flow.

Claim 3

The combination as set forth in claim 1 wherein said perforated plate presents about 32 to 52 percent open area to said high velocity gas stream.

Claim 4

The combination as set forth in claim 1 wherein the cross-sectional areal extent of said plate is about (8/9)2 that of said inlet conduit so as to provide an unimpeded annulus for high speed gas flow therepast.

Claim 5

The combination as set forth in claim 1 wherein said perforated plate member is disposed at about a 74* angle of attack to said oncoming high velocity gas stream.

Claim 6

The combination as set forth in claim 1 wherein said perforated plate is disposed at a distance of about D/2 from the terminus of said inlet conduit when said conduit is of a diameter D.

Claim 7

In a dust collecting device wherein particulate matter borne by a gaseous carrier is separated therefrom, a plenum chamber containing means to effect the separation of said particulate matter from said gaseous carrier, an inlet conduit terminally connected to said plenum chamber for introducing a high velocity stream of particulate material bearing gaseous carrier therein, and a diffuser assembly disposed within said plenum chamber in the path of advance of said high velocity stream of particulate material bearing gaseous carrier, said diffuser assembly including a perforated plate member of perimetric contour corresponding to that of said inlet conduit and so constituted as to present about 32-52 percent open area to said high velocity gas stream, said correspondingly contoured perforated plate member being of perimetric cross-sectional areal extent of about (8/9)2 of said inlet conduit so as to provide an unimpeded annulus for high speed gaseous carrier flow peripherally therepast, and means positioning said perforated plate member in spaced centered relation with the terminus of said inlet conduit at about a 16* angle of inclination from perpendicularity to the longitudinal axis of the inlet conduit and to the flow of gaseous carrier bearing particulate matter emanating therefrom such as to avoid deflection of the portions of said gaseous carrier impinging upon the imperforate portions of said plate member toward said separating means and to subdivide a substantial portion of said gaseous carrier into a multiplicity of jets on the downstream side thereof peripherally encompassed by said annulus of high speed carrier gas flow.

Claim 8

In a dust collecting device wherein particulate matter borne by a gaseous carrier is separated therefrom, a plenum chamber containing means to effect the separation of said particulate matter from said gaseous carrier, an inlet conduit terminally connected to said plenum chamber for introducing a high velocity stream of particulate material bearing gaseous carrier therein, and a diffuser assembly disposed within said plenum chamber in the path of advance of said high velocity stream of particulate material bearing gaseous carrier, said diffuser assembly including a perforated plate member of perimetric contour corresponding to that of said inlet conduit and so constituted as to present about 32-52 percent open area to said high velocity gas stream, said correspondingly contoured perforated plate member being of perimetric cross-sectional areal extent of about (8/9)2 of said inlet conduit so as to provide an unimpeded annulus for high speed gaseous carrier flow peripherally therepast, and means positioning said perforated plate member in spaced centered relation with the terminus of said inlet conduit at about a 16* angle of inclination from perpendicularity to the longitudinal axis of the inlet conduit and to the flow of gaseous carrier bearing particulate matter emanating therefrom such as to avoid deflection of the portions of said gaseous carrier impinging upon the imperforate portions of said plate member toward said separating means and to subdivide a substantial portion of said gaseous carrier into a multiplicity of jets on the downstream side thereof peripherally encompassed by said annulus of high speed carrier gas flow.

Claim 9

The combination as set forth in claim 6 wherein said perforated plate member includes a perpendicular perimetric flange mounted thereon and disposed to face the flow of gaseous carrier emanating from said inlet conduit.