FIELD: separation methods. SUBSTANCE: hydrocyclone used for separating heterogeneous liquid-solid-type dispersed systems and when purifying drilling fluids contains spin-like body with smooth surface. Upper part of the body accommodates impeller to transform screw-like movement of purified liquid into headway. In the lower part of spin-like body, hydraulic gate is installed to enhance efficiency of the formation of back purified liquid stream. EFFECT: enhanced operation efficiency. 1 dwg
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