Homogeneous substitution method and apparatus for cake using fil

Details Homogeneous substitution method and apparatus for cake using fil Homogeneous substitution method and apparatus for cake using fil

1991-07-18

1992-05-12

Jones, W. Gary

Liquid purification or separation

Processes

Separating

100 37, 100113, 100197, 100211, 134 17, 210224, 210228, 210231, B01D 25164, B01D 2528

Patent

active

051125021

ABSTRACT:
In homogeneous substitution washing method and apparatus for a cake using a filter press which comprises pairs of opposed squeezed and squeezing filtering plate units, pairs of opposed squeezed and squeezing filtering cloths, each pair of filtering cloths being arranged between the pair of filtering plate units, and diaphragms. Each diaphragm is arranged on one side of one of the pair of filtering plate units. Stock solution is supplied into a space between the pair of filtering cloths, and is pressurized and dehydrated by the diaphragm to form the cake. The cake is processed in washing to obtain a clean raw material. In parallel with the pressurizing and dehydrating step of the stock solution, a washing liquid is poured into a space between the diaphragm and the squeezing filtering cloth abutted against the diaphragm, at a pressure at least a pressurizing and dehydrating pressure applied to the stock solution through the diaphragm, to wash the cake between the pair of filtering cloths.

REFERENCES:
patent: 4722789 (1988-02-01), Kupka
patent: 4855062 (1989-08-01), Oelbermann
patent: 4931177 (1990-06-01), Parmentier
Chemie-Ingenieur-Technik vol. 41, No. 12, 1969, pp. A923, A924: "Ein neues Waschprinzip Fuer Filterpressen".
Aufbereitungs-Technik vol. 5 May 1971, pp. 285-288: E. Borgmann: "Leistungssteigerung und Rationalsierung in der Druckfiltration durch Membranfilterpresse und Pressfilterautomat".

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