Clarifying suspended solids from liquid process streams

Details Clarifying suspended solids from liquid process streams Clarifying suspended solids from liquid process streams

1993-09-08

1995-10-17

Lamb, Brenda Adele

Paper making and fiber liberation

Processes and products

Reclamation, salvage or reuse of materials

2102212, 2105121, 210787, 210703, 209166, 209170, 209725, 209730, D21F 166

Patent

active

054587387

ABSTRACT:
Liquid process streams--such as white water, pressate, or washer filtrate from a pulp and paper mill--are clarified in an efficient manner using a gas sparged hydrocyclone, which takes up a minimum of floor space. A liquid stream having a consistency of less than about 0.5% solids is introduced into a first end of a vortex. Gas is sparged into the liquid in the vortex to cause particles to attach to gas bubbles and move through a rejects outlet at the first end of the vortex, while clarified liquid is removed from a second end of the vortex. A pedestal is typically provided at the accepts outlet, having a radial clearance with the inside of a porous tube through which the gas is sparged that is about 8-12% the radius of the porous tube.

REFERENCES:
patent: 4279743 (1981-07-01), Miller
patent: 4838434 (1989-06-01), Miller et al.
patent: 5022983 (1991-06-01), Myers
patent: 5069751 (1991-12-01), Chamblee et al.
patent: 5116488 (1992-05-01), Torregrossa
patent: 5131980 (1992-07-01), Chamblee et al.

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