Filtering centrifuge

Details Filtering centrifuge Filtering centrifuge

1987-05-26

1991-03-05

Hruskoci, Peter

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210107, 210108, 210137, 210147, 210180, 210368, 210375, 210396, 210744, 210781, 210798, 210808, B01D 17038

Patent

active

049975757

ABSTRACT:
In a filter centrifuge with a filter medium, a filter cake is formed following the introduction of a suspension. In a first filtration phase the suspension is exposed to centrifugal filtration a first filtration which dewaters by the inertia forces. In a second filtration phase, the cake is subjected to compressed gas filtration using frictional forces generated by a gas flow. In the second filtration phase, gas at atmospheric pressure flows through the filter cake and filter medium and is exhausted from a filtrate collector space. This space is composed of a gas space and a filtrate liquid space. To obtain flow through the solid cake at an increased pressure difference, it is proposed to provide the filter centrifuge in a pressure housing with a superatmospheric pressure controlled by a difference in filtrate liquid levels in the filtrate liquid space and the annular space following the filter. This liquid control prevents the penetration of filtrate liquid into the gas exhaust line.

REFERENCES:
patent: 3385443 (1968-05-01), Cuza
patent: 3504794 (1970-04-01), Tholl et al.
patent: 3864256 (1975-02-01), Hultsch et al.
patent: 4101421 (1978-07-01), Hultsch
Chemical Engineer's Handbook, 5th Ed., Perry and Chilton (ed.), McGraw-Hill Book Co., 1973, pp. 19-88.
Handbook of Chemistry & Physics, Forty-Eight Edition, Published 1967, Robert C. Weast & Samual M. Selby, pp. F-63.

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