Differences between two-phase centrifuges and three-phase horizontal sedimentation centrifuges

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A two-phase separation horizontal screw sedimentation centrifuge consists of a frame, cover, main bearings, drum, screw, differential gear, drive system, and control system. The drum and the screw rotate at high speed in the same direction but at different speeds; the material enters the inner cylinder of the screw through the feed pipe, and then enters the drum via the feed inlet. Under the action of centrifugal force, the heavier solid particles settle on the wall of the drum to form a sludge layer; a screw continuously pushes these settled solid particles toward the cone end of the drum, from where they are discharged outside the machine through the slag discharge port. The lighter liquid phase material forms an inner liquid ring, which continuously overflows from the large-end overflow port of the drum and is discharged outside the machine through the drainage port. The three-phase separation horizontal spiral sedimentation centrifuge is primarily used for solid-liquid-liquid separation, that is, to separate one solid phase (with the highest density) from two liquid phases with different densities. The drum and the screw rotate at high speed in the same direction but at different speeds; the material enters the inner cylinder of the screw through the feed pipe, and then enters the drum via the feed inlet. Under the effect of centrifugal force, the solid-phase material deposits on the drum wall to form a sludge layer, while the two liquid-phase materials form a light liquid phase ring and a heavy liquid phase ring respectively. Starting from the drum wall and moving inward, the layers are in order the solid-phase layer, the heavy liquid phase layer, and the light liquid phase layer. The screw continuously pushes the solid material deposited on the drum wall toward the cone end of the drum, where it is discharged outside the machine through the slag discharge port. The light liquid phase and the heavy liquid phase continuously overflow through different overflow ports at the larger end of the drum. Thereby achieving three-phase separation.