Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1975-06-20
1976-07-13
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 77, B01D 3306
Patent
active
039692477
ABSTRACT:
An improved process for dewatering sodium bicarbonate solids and similar substances formed as a cake on a rotary drum vacuum filter that is disposed for rotation in partial submergence in a slurry containing the suspended solids. The process includes the steps of pressing the filter cake against the surface of the filter drum by means of a pressure-applying roll which is driven to rotate so that its surface velocity exceeds the velocity of the drum surface by 25 to 75% and, thereafter, drawing steam through the filter cake while it is still on the surface of the filter drum.
REFERENCES:
patent: 2753766 (1956-07-01), Simpson
patent: 2997176 (1961-08-01), Delmas
patent: 3100192 (1963-08-01), Rich
patent: 3338411 (1967-08-01), Von Der Gathen et al.
patent: 3592341 (1971-07-01), Emmett, Jr. et al.
Emmett, Jr. Robert C.
Pocock Benjamin K.
Envirotech Corporation
Hart Charles N.
Krebs Robert E.
MacDonald Thomas S.
Spitzer Robert H.
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