Interior structure of drilling decanter centrifuge

The horizontal spiral sedimentation centrifuge is made of two parts: One part is drum and the other part is spiral conveyor.

The shape of drum has cylindrical, cone and tube cone combination form. The cylindrical is conducive to solid phase dehydration, cone is conducive to liquid phase to clarify, tube cone combination form has has the features of cylindrical and cone. Now we researching the tube cone combination form. Usually weld the fillet on the surface of the drum to reduce the drum wall wearing and prevent to sediment slip.

Drum length ratio is an important parameter to separation, The more difficult materials to separate the need the bigger ratio. Otherwise, the part taper angle of drum cone also has the big inflence to translate materials.

Spiral conveyor is an important part of horizontal spiral centrifuge, its main functions are transporting sediment, discharging residues. It is made of spiral impellers, inner tank and inlet pipe. Its screw blade is double spiral, the screw pitch decided accoring to the actual condition, the impellers material have the high-wearing feature. The dip angle of impellers have two types, one is the screw impeller perpendicular to the drum generatrix. The other type is the impeller generatrix is perpendicular to rotary axis of the drum.

The main function of internal cylinder is receiving distribution and accelerate the suspension. In order to make the suspension enter into the drum and obtains the better sedimentation effect can adopt many design schemes. Its main method is letting the radial velocity of suspension is minimum in the outlet of the internal cylinder that make the suspension stay a long times in the radial direction and is conducive to the suspension sedimentation and separates.