The purpose of decanter centrifuge for sludge dewatering is to separate the solids in the mixed fluid whose specific gravity is larger than that of the liquid phase from the liquid phase fluid.

When the mixed liquid enters the inner cavity of the high-speed decanter centrifuge for sludge dewatering with a feed port, the solids with a larger specific gravity in the mixed liquid will quickly settle to the inner wall of the drum under the action of centrifugal force, and be discharged from the solid phase outlet by the screw pusher. It is discharged out of the drum; at the same time, the liquid phase with a smaller specific gravity forms an inner liquid ring under the action of centrifugal force, and is discharged out of the drum through the liquid phase overflow port. The rotating drum and the screw pusher operate at high speed at the same time. Due to the certain speed difference between the two, the solids that settle on the drum wall are pushed to the liquid outlet by the screw pusher uninterruptedly, and the whole separation process continuously.

Compact structure, less auxiliary equipment, less land occupation; high solid recovery rate, low separation liquid turbidity; operation in a closed condition, sanitary working environment, low odor; no filter medium, convenient operation and maintenance, and high degree of automation; special It is important to add no or less chemical conditioning agent. Although the power cost is higher, the total operating cost is lower.

The noise of decanter centrifuge for sludge dewatering is generally large, and the moisture content of the sludge after dewatering is relatively high, and it is not easy to separate when the density difference between solid and liquid is small. If the sludge contains sand and gravel, it is easy to grind the centrifuge fluid and damage the equipment.