SCREW MIXER OF OILY SOILS Russian patent published in 2011 - IPC B01F7/08 

FIELD: oil and gas industry.

SUBSTANCE: mixer includes housing with loading and unloading openings, screw located in it and having additional external spiral with opposite coiling, which is connected to screw and between its coils by means of braces. Braces radially attaching the spiral to screw shaft and longitudinally attaching the spiral turns are made in the form of belt wound along helical generatrix. Screw generatrix of longitudinal brace has one and a half and more pitches at turn pitch interval of external spiral. Longitudinal braces have opposite direction of screw generatrix to external spiral with possibility of additional soil mixing in the area between spiral turns. Radial braces with screw generatrix are cone-shaped and have capability of soil movement towards spiral periphery.

EFFECT: higher capacity and quality of mixtures including components of oily soils.

4 cl, 1 dwg