The invention discloses a horizontal screw
centrifuge. A spiral conveyor is located in a rotary drum shell, a feeding
pipe is in communication with an inner
pipe of the spiral conveyor, a dischargingport is formed in the inner
pipe, spiral blades are fixed to the periphery of the inner pipe, a light phase outlet is located in an end cover on one side of the rotary drum shell, an isolation disc ofa disc
system is arranged between the
spiral blade at the
tail end of the spiral conveyor and the light phase outlet, the isolation disc is fixed to the spiral conveyor, a flow channel is formed in the side, close to the inner pipe, of the isolation disc, and a
solid phase channel is formed between the isolation disc and the inner wall of the rotary drum; and the disc
system is positioned betweenthe isolation disc and the light phase outlet, and is fixed with the rotary drum. The disc
system is additionally arranged between the rotary drum shell close to the light phase outlet and the innerpipe, tiny
solid particles are rapidly separated from a
liquid phase, the content of the tiny
solid particles in a liquid is greatly reduced, and therefore final
clear liquid with higher purity can beobtained, filtering treatment of the tiny solid particles does not need to be carried out in the later procedure, and the
centrifuge capability of the
centrifuge is increased.