Floatation apparatus for removal of distrubing substances, espec

Details Floatation apparatus for removal of distrubing substances, espec Floatation apparatus for removal of distrubing substances, espec

1992-05-22

1994-01-18

Lithgow, Thomas M.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209168, 2102212, 2102211, 162 4, 261DIG75, B03D 124, B21B 132

Patent

active

052794245

ABSTRACT:
The flotation apparatus removes ink- and contaminant particles from a fiber stock suspension which is produced during the preparation of waste paper. Admixing of air to the fiber stock suspension is accomplished in stepped diffusors. The fiber stock suspension admixed with air, prior to infeed into a flotation container, is guided through a deflection element effective as an impact mixer and followed by a mixing diffusor having a preferred flow direction. This flotation apparatus is especially suited for eliminating disturbing or spurious substances which are present throughout a relatively wide grain size spectrum. A particularly preferred construction uses one or more closed flotation containers, wherein the air effluxing from the flotation foam can be advantageously re-used for aeration of further infed fiber stock suspension.

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