FILTER AND METHOD OF FILTRATION Russian patent published in 2011 - IPC B01D29/66 

FIELD: process engineering.

SUBSTANCE: invention relates to filtration of fluids containing solid substances. Proposed device comprises backwash filter 108 and wash pipeline 136 to carry fluid fed in counter current during backwash phase from filter 108 to device of further processing. Filter 108 has coarse impurity outlet communicated with wash pipeline 136. Coarse impurities are discharged from filter 108 into wash pipeline 146 with backwash filter in filtration phase. Coarse impurities 215 brought into wash pipeline 136 through aforesaid outlet during backwash phase may be fed into post processing device together with fluid forced therein in countercurrent. Said outlet may be shut off by valve 150 with filter 108 in backwash phase.

EFFECT: simplified backwashing, efficient method of impurity transfer to post processing device.

13 cl, 7 dwg