LZZG deep cone thickener promoted the structure of internal feed tube on the basis of traditional vertical flow sedimentation tank,optimized flocculation and deep solids compression provide paste consistency underflow and higher process rates, which greatly increase settling efficiency. The deep cone thickener is circular, suspended solids settle down into bottom conical sludge tank by gravity, clear water flow away from overflow port around the upper tank, which is also called paste thickener. The port of the overflow is equipped with filter and baffle, which improve the water quality that poured out.