Continuous working spiral discharging,high capacity .Compact structure and easy maintenance. Wide applicability for chemical, oil, foodstuff, pharmacy industries and environmental protection in which solid-liquid separa -tion is required. Suitable for various materiaIs, capable for separating wide-ranging solid phase grains (0.005-2mm) working normally when separating solid phase protection in which solid-Iiquid separation is required. With grains of different sizes.