A pusher centrifuge is a type of filtration technique that offers continuous operation to de-water and wash materials such as relatively in-compressible feed solids, free-draining crystalline, polymers and fibrous substances. It consists of a constant speed rotor and is fixed to one of several baskets. This assembly is applied with centrifugal force that is generated mechanically for smaller units and hydraulically for larger units to enable separation.

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     Working principle

The pusher centrifuge is a fully automatic continuous filter centrifuge.The solid/liquid mixture to be separated is continuously conveyed to the high-speed rotating feed distributor of the centrifuge through a conveying pipe or a screw conveyor of the centrifuge to be evenly distributed on the screen of the first-stage drum. The liquid to be separated rapidly passes through the screen of the centrifuge under strong centrifugal force and is discharged into the liquid collecting hood; the solid phase is trapped on the surface of the screen by the screen to form a solid filter cake.
The two-stage push-type centrifuge drum rotates at a high speed, and the first-stage drum also performs axial reciprocation under the action of the hydraulic piston through the push rod; thus, the ring-shaped solid filter cake is pressed according to the piston. The length of the stroke is pushed to the second stage drum through the first stage,drum; after the filter cake of the second stage drum is further dehydrated, it is pushed to the solid collection tank of the casing to discharge the centrifuge.
The second-stage pusher centrifuge and the pusher pan of the three-stage pusher centrifuge are axially reciprocated while rotating, so that the solid filter cake on the first-stage drum is sequentially pushed to the second-stage drum. The third stage drum is finally collected by the collection tank and discharged into the centrifuge.
In some industrial applications, the solid needs to be washed to obtain a high- purity product; while the piston pusher centrifuge is running, the washing liquid can be sprayed on the surface of the filter cake to effectively wash the filter cake; after the washing liquid rinses the filter cake, lt is also discharged through the screen and the liquid collection hood; the washing liquid and the mother liquid can be discharged separately.

     Industry Applications

The push-type centrifuge is suitable for separating suspensions containing solid phase particles larger than0.05 mm and concentrations greater than 30%. Suitable for chemi- cal, fertilizer, alkali, salt and other industries, has been widely used in the following products for solid-liquid separation.
For example, vacuum salt, sea salt, caustic soda industry salt and alkali separa- tion, monohydrate (heavy alkali), ammonium bicarbonate, sodium hydrogencarbonate, potassium carbonate,sodium carbonate, ammonium chloride, calcium chloride, lithium chloride, chloroacetic acid,chlorine Potassium,potassium chlorate,sodium chlorate, sodium formate,potassium cyanide,sodium cyanide,ammonium sulfate, zinc sulfate, nickel sulfate, sodium sulfate (Yuanming powder, Glauber’s salt), urea, boric acid, borax, potassium sulfate, manganese sulfate, Copper sulphate, ferrous sulfate,potassium sulphate, potassium nitrate, ammonium nitrate, citric acid, nitrocel- lulose, oxalic acid (oxalic acid), adipic acid, phosphate, coal, cotton, acetate, nitrocellulose,armor Cellulose,PVC,epichlorohydrin, glyphosate,glyphosate,urea phosphate,plastic, ABS, polyacryl- amide, cyclohexanone, glucose, lysine, alanine, chemical wastewa- ter, pharmaceutical intermediates , resin and many other materials.

     Structural eatures

• Adopting new structure, more reliable design, advanced fabric method, quick and stable axial reversing mechanism, high speed and pushing times, smooth and wear-resistant milling net,reason- able process parameters Get the ideal separation and yield.
• The high separation factor brought by the high speed, the material is fully retracted when the first stage drum enters the second stage drum, so that the moisture content of the filter cake is lowered Very low.
• When there is a requirement for the purity of the solid product, the machine can be effectively washed, and if necessary, the washing liquid and the mother liquid can be separately discharged.
• Three-stage push-type centrifuges Due to the more frequent turnover of the filter cake and the longer filtration zone, it is possible to obtain a drier solid and a more adequate washing effect under the same feed conditions.
• The dense and uniform precise gap of the milled screen, the filter bed formed by the thick filter cake can retain a large amount of fine crystals, which can reduce the loss of crystals with the mother liquor, thus obtaining a higher solid recovery rate.
• Accurate design, careful selection, precision processing and assembly, so that the machine can be implemented for a long time without trouble, the maintenance costs are lower.
• Optional feeding pre- thickening device can make the centrifuge of this type more widely used.

     Advantageous features

• Low energy consumption, high output
• Low moisture content in the finished product
• High solids yield
• High flushing efficiency
• Low crystal breakage
• Low vibration
• Absolute reliability and durability