This invention discloses a
pusher centrifuge for direct separation of heavy alkali, belonging to the technical field of heavy alkali centrifuges. It includes an
oil tank that also serves as the
machine base, a bearing housing fixed thereon supporting a hollow shaft, and a pusher shaft nested within the hollow shaft, rotating synchronously via a guide key and driven reciprocating by a compound
piston. Three concentrically nested drums, each containing cylindrical and conical sections, are used. Each drum has a corresponding screen and pressure ring fixed to it. A pusher plate connects to the bottom of the second-stage drums, and a feeding cone is mounted on the pusher plate, with a feed
pipe extending into the feeding cone. Multiple
wash water pipes are installed at the product chamber door, their positions adjustable via adjusting bolts. Waste washing liquid and circulating washing
liquid gas-liquid separators are connected to the drum drain ports, with the circulating liquid returning to the
wash water pipes. A partition seal is installed between the bearing housing and the product chamber, and a
stuffing box seal is installed between the bottom of the third-stage drums and the pusher shaft. This device improves separation efficiency and
resource utilization through staged centrifugal
dehydration and adjustable washing.