Solid liquid separation horizontal decanter centrifuge (Decanter Centrifuge for short), one of key machines for solid liquid separation, separates suspension liquid for two or three (multiple) phase materials in different specific weights by centrifugal settling principle, especially clarifies liquids containing suspended solid.
Such centrifuge applies to solid liquid separation of suspension liquids with solid phase particle equivalent diameter ≥3μm, weight concentration ratio ≤10%, volume concentration ratio ≤70% or solid liquid density difference ≥0.05g/cm3.
Hongji has different series of decanter centrifuges with bowl diameter from 250~1100mm.The machine can be also sorted by bowl type, such as thickening, dewatering, classifying, clarifying etc., to be fit for different separations.
Main feature:
1.The drum and scroll conveyor are made of stainless steel resisting corrosion.
2.The scroll conveyor was coated with wearable alloy or welded with alloy plate(optional)
3.Stepless speed regulation for the bowl.
4.Step or stepless speed regulation for scroll's differential speed.
5.Safety protection:rotation rate detection over,vibration protection,motor overload and overheat protection,protection for scroll when zero differential speed occurs.
6.For the highly sticky materials,it can add the hydraulic differential gear to stabilize.

Function of dewatering decanter centrifuge:
Decanter centrifuges are used in industrial applications for the continuous separation of solids from liquids where the volume of solids is relatively high. The largest application in the UK is for dewatering sewage sludge containing around 1.5% to 3% solids in water. So the job of the centrifuge is to concentrate the amount of solids to just over 20% and remaining water, known as the Centrate, is as free from solid particles as possible. For some sludges a polymer (a chemical) is added to the process to encourage the solids to settle out of solution which aids the dewatering process. Providing the solids in a mixture of a light phase such as water and a heavier phase will settle in time under normal gravity, then using a centrifuge will accelerate the process. This is because normal gravity has a force of one G and a decanter centrifuge produces a centrifugal force of up to 4,000 G.
The centrifuge comprises a rotating assembly driven by a large electric motor mounted in a secure foundation frame, bolted to the ground through vibration dampers. The rotating assembly itself has two main components: the outer bowl and a screw conveyor. When the centrifuge is run up to operating speed the main drive motor turns the outer bowl at typically 3,000 r.p.m. A secondary motor is connected to the screw conveyor, the scroll, via cyclo-gearbox. The produces a differential speed between the outer bowl and the scroll of between 10 and 20 r.p.m. and has the effect of providing a conveying action inside the rotating assembly. When the centrifuge is up to speed the sludge, a mixture of solids and liquids, is pumped into centrifuge by an external pump through a feed tube into the feed chamber. The effect of centrifugal forces cause the solids to move towards the outside of the bowl and a separation of solids and liquids occurs. the conveying action of the scroll moves the solids towards the steep angle of the bowl where they are ejected through a number of discharge ports and fall into a collecting container under gravity. The liquid phase, runs over the weir plates at the other end of the rotating assembly and collected in a tank and pumped away. This is shown clearly in the video simulation which is available and can be opened in a new window alongside this explanation.
The feces water treatment centrifuge could deal with the material whose range of concentration is large, small size which is widely distributed. Solid particles are less than 0.5mm as rigid particles, and less than 10mm as non-rigid particles, the machine can treat effectively.

LW series decanter centrifuge is a horizontal centrifuge with continuous feeding and continuous discharging. The settling speed is determined by particle size, particle shape, difference in density between solids and liquids as well as their viscosity.

                    Screw Conveyor                                                                                           Drum

Feature                                                                                                                                                                                                                                                         

♦ Main parts such as the bowl and conveyor are made of corrosion-resistant stainless steel or duplex steel, offering high maximum bowl speed and high centrifugal force.

Tungsten Carbide Tiles

♦ Optional planetary gearbox and hydraulic gearbox, offering wide range of differential speed adjustment