Dewatering solids suspensions with controlled flocculant additio

Details Dewatering solids suspensions with controlled flocculant additio Dewatering solids suspensions with controlled flocculant additio

1985-07-18

1987-06-23

Castel, Benoit

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210738, 210739, 210101, 210105, 210206, C02F 1114, C02F 152

Patent

active

046751165

ABSTRACT:
Solids suspensions are dewatered by filter plate pressing by adding a flocculant downstream of the filter press pump(s), the pump(s) being of the positive displacement type whereby the amount of flocculant required can be determined from the speed of the pump(s). Apparatus is provided which includes a filter plate press, one or more filter press pumps of the positive displacement type, and means for sensing the speed of the pump(s) and for controlling the dose of flocculant in dependence thereon. A mixer is constructed as a cylindrical chamber with radial inlets and axial outlets, and includes plate-like impellers.

REFERENCES:
patent: 2268461 (1941-12-01), Nichols
patent: 3584840 (1971-06-01), Fuchs
patent: 3605775 (1969-11-01), Zaander et al.
patent: 4170553 (1979-10-01), Lang et al.
patent: 4198298 (1980-04-01), Zuckerman et al.
patent: 4470907 (1984-09-01), Sencza
patent: 4576723 (1986-03-01), Eisenlauer et al.
Chemical Engineers' Handbook, 5th ed. edited by Perry and Chilton, 1973, McGraw-Hill Book Co., pp. 6-3.
Dillon et al., "Predicting Flowrates From Positive Displacement Rotary Pumps", Chemical Engineering, Jul. 22, 1985, pp. 57-60.

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