CENTRIFUGE WITH SCREEN BOWL Russian patent published in 2013 - IPC B04B1/20 

FIELD: process engineering.

SUBSTANCE: set of invention relates to filtration centrifuges with screen bowl and to separation of suspensions to fluid and solid components. Centrifuge comprises conveyor including rotary hub, at least, one helical blade extending radially from the hub and in axial direction of sad hub and bowl surrounding the conveyor and rotating about the axis. Said bowl comprises cylindrical section extending from conveyor inlet and screen tapered section extending toward conveyor outlet end. Screen tapered section is arranged at the angle to hub axis to decrease friction of solids to the level that allows the cake formed by said solids to perform controlled motion toward screen tapered section with minimum counter pressure but does not allow it to brake off said section and out from centrifuge. Note here that, at least, one helical blade does not extend along screen tapered section. Proposed method comprises separating solid component from liquid component of the suspension fed inside the bowl arranged around conveyor hub. After suspension feed, solid particles are displaced along bowl cylindrical section in the first direction while larger portion of liquid in the second direction opposite the first one using, at least, one helical blade extending from conveyor hub. Thereafter, solid particles are displaced from cylindrical section along bowls screen tapered section. Screen tapered section is arranged at the angle to hub axis to decrease friction of solids to the level that allows the cake formed by said solids to perform controlled motion toward screen tapered section with minimum counter pressure but does not allow it to brake off said section and out from centrifuge.

EFFECT: higher efficiency and reliability.

15 cl, 2 dwg