Vacuum filtration process employing a circular vacuum box

Details Vacuum filtration process employing a circular vacuum box Vacuum filtration process employing a circular vacuum box

B - Operations, Transporting

01

D

183/11

B01D 19/00 (2006.01) B01D 33/00 (2006.01) B01D 35/00 (2006.01)

Patent

CA 1048942

IMPROVEMENT RELATING TO A VACUUM FILTRATION PROCESS EMPLOYING A CIRCULAR VACUUM BOX ABSTRACT OF THE DISCLOSURE A process which enables a mixture of liquid and gas, coming from a rotary vacuum filter, to be collected and simul- taneously separated. The mixture of gas and liquid is passed from the fil- ter into a vacuum box provided with a space which rotates around the axis of the filter and is generally of circular shape, in which the liquid and gas separate, the liquid is in- troduced into a lower fixed space generally in the shape of a circular channel, and the gas is introduced into an upper fixed space generally in the form of a circular channel, so that the liquid and gas are collected separately. The process and the apparatus of the invention are advantageously employed in circular table filters divided into filtration zones and provided with wash means, especially in the manufacture of phosphoric acid by the wet method.

236868

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