Pulp thickner is a continuous working equipment, which concentrates on the concentration and clarification of the materials. The efficient concentrator has big processing power and good separation performance. There are also other advantages, such as adaptability, low labor intensity, stable performance, easy installation and operation, small footprint and low maintenance costs. More importantly, it can achieve the closed continuous automatic separation. Increasing the liquid diversion hole in the spiral can accelerate the liquid phase, and thereby reduce the residence time of the liquid phase in the drum. Then not only the space of the drum are effectively applied, but also it will enable the processing of the large capacity materials. Pulp thickner can be used in the chemical industry and building materials industry. Sewage sector concentration and tailings dewatering process can also use the machine, so that the substance in the industrial drainage will be made of use. The product is characterized by the added flocculant, which has increased sedimentation particle size of solid particles, so the size of the settlement surface can be enlarged, and this will improve the handling capacity of the role. The pulp thickner is also equipped with complete automatic control facilities.