Fixed Cylinder Centrifuge

A fixed cylinder centrifuge comprising:

• a base;
• a driving device;
• a screw propeller;
• a liquid inlet pipe;
• a fixed cylinder, wherein the fixed cylinder comprises a straight cylinder and a conical cylinder, wherein the straight cylinder and the conical cylinder are communicated with each other and are connected to each other through a first flange, wherein two rows of sand discharging holes are formed in the tail end of the conical cylinder;
• a box body erected at a bottom of an outer side of the straight cylinder and wherein the conical cylinder and a box cover are arranged at a top of the outer side, the box body erected on the base, wherein the box cover is hinged to the box body;
• wherein the screw propeller is rotatably arranged in the straight cylinder and the conical cylinder, and comprises a central pipe and a blade, wherein the blade is spirally welded on an excircle of the central pipe in an axial direction;
• a spacing between the tail end of the blade and the inner wall of the straight cylinder and between the tail end of the blade and the inner wall of the conical cylinder;
• a plurality of circular holes formed in a pipe surface of the central pipe, wherein one end of the central pipe penetrates through one side of the box body, and is driven to rotate through the driving device;
• wherein one end of the liquid inlet pipe penetrates through the other side of the box body, extends into the conical cylinder, and is communicated with the other end of the central pipe;
• an overflow plate fixedly arranged at the other end of the straight cylinder;
• a plurality of overflow ports formed in a plate surface of the overflow plate;
• and
• a slurry discharging port and a sand discharging port corresponding to the overflow plate, the sand discharging holes formed in the bottom of the box body.