GB1406650A - Apparatus for and method of treating and transporting fluid- entrainable particles - Google Patents

Abstract

1406650 Mixing apparatus; Fluid-energy mills; Pneumatic separation CROWN ZELLERBACH INTERNATIONAL INC 6 Dec 1972 [31 Jan 1972] 56376/72 Headings B1C, B2A and B2H [Also in Divisions B1, B8 and F4] In apparatus for mixing de-agglomerating, separating and transporting fluid-entrained particulate material, the fluid enters at 43 and issues from an annular slit 37, entraining particles from hopper 10 and attaching itself to surface 35 whereby it passes along a first flow path 11 at the end of which it encounters a fluid curtain issuing from an annular slit 16. Particles undergo de-agglomeration and intense mixing in the zone of the curtain. Fluid from the slit 16 together with any particles entrained thereby then attaches itself to the surface 17 whereby it is guided into a second flow path 21 and the entrained particles art deposited in a collector 22. Particles having sufficient momentum at the end of the first flow path may pass through the curtain and fall into a collector 27; or if their momentum is greater still may be entrained by fluid issuing from an annular slit 26, which attaches itself to a surface 68, 24 and conveys the particles through a conduit 25 to a further collector (not depicted). The widths of the slits 37, 16, 26 are screw-threadedly adjustable (Figs 2 and 3, not shown) and the assembly consisting of nozzle assembly 15 and arm 95, (together with conduit 25 and collector 27) may be axially adjusted by crank 98 to position slit 16 in relation to the flow attachment surface 17. The collector 27 may be open at 90 as shown, to entrain atmosphereic air, or may be closed and have a tangential inlet (92, Fig 5 not shown) for fluid entrained or under pressure, and a tangential outlet (93) for fluid and entrained particles. Examples and applications relate to the. separation of polyethylene fibres from water and sand, de-agglomeration of polyethylene fibres intended for making synthetic paper, separating and opening of rayon staple fibres, mixing of fibres of polyethylene and rayon, the coating of transported particles by vapours or powders, and the transport of ground metallic ores, metal particles, wood chips, cellulose fibres and cereal grains.