Process and apparatus for the dewatering of solids in suspension

Details Process and apparatus for the dewatering of solids in suspension Process and apparatus for the dewatering of solids in suspension

1981-04-30

1983-09-20

Hill, Ralph J.

Classifying, separating, and assorting solids

Sifting

Concave and convex sifters

209290, 209303, 210369, 210379, B01D 3700, B04B 300

Patent

active

044054548

ABSTRACT:
A process for the dewatering and particle classification of solids from suspensions, e.g. coal from a slurry in which the coal is transported, makes use of a dewatering centrifuge having two frustoconical centrifuge drum sections of different inclinations such that in a first filtering zone the particles are preliminarily dewatered and then pass by automigration to the next centrifuge drum at which further dewatering takes place. The suspension on the first sieve surface forms a thin layer classification zone having a thickness up to 5 mm and in which the coarse fraction is retained while the fine fraction is passed. The coarse fraction automigrates to the next sieve surface where it is dewatered and the fine fraction separated out in the thin layer classifying zone is then filtered under pressure in a subsequent stage.

REFERENCES:
patent: 2651416 (1953-09-01), Van der Mark et al.
patent: 4257879 (1981-03-01), Bogenschneider et al.

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