Operating principle

Working principle of LWLZ screw thickening and filtration centrifuge

The suspension will be fed into sedimentation rotor drum firstly for sedimentation and thickening before it' s transferred to the filtration rotor drum for filtration separation and rinsing.

The suspension will be fed in via the larger end of the sedimentation rotor drum. Solid content of which will settle down and lie on inner wall of the rotor drum, which will be conveyed to the smaller end of the drum under effect of screw; meanwhile, the liquid content of which will be discharged via overflow port at larger end of the drum. The filtering cake will be compressed and dehydrated as it' s conveyed from smaller end of the drum to the larger end.

The centrifugal force increases as the turning radius of the drum increases, reducing moisture content of the solid (which is high at beginning) as far as possible and achieving automatic continuous process of liquid/solid separation.

The unit is designed with washing pipe for rinsing and purification of filtering cake by end of filtration process, the thinner the filtering layer, the better effect of rinsing and the lower consumption of detergent.

For materials that are prone to secondary crystallization, steam pipes can be configured to clean the crystals out of the inner cavity at high temperature in preset frequency.

LWLZ horizontal decanter is mainly applicable for processing bulk material with lower solid content and liquid containing gel.

 

LWLZ Structure diagram

 

 

Technical parameter

 

 

Main features

u The rotor drum may be set with a cone angle of 20 or 40 degree depends on different working conditions

u Filtering net may be metal lathing or wedge-shaped net

u Variable frequency control, rotor drum velocity stepless adjustment

u Various type of lubrication: Grease lubrication (standard), oil spray lubrication, oil-air lubrication

u Fully automatic oil recharging device

u High precision rotor drum (digital machining, high precision balance), high separation factor, improving separation effectiveness

u Designed with main shaft seal which prevents from fleeing material

u Joint driven belt

u Velocity sensor

u Automatic cleaning process: Clean the feeder pipe, rinsing pipe, rotor drum external, unit cover inner surface cleaning, discharge hopper cleaning

u Fully enclosed system, satisfying pharma specification

u Multiple layers of protection: over-vibration protection, cover-opening protection, motor over-load protection, N2 protection, static grounding protection, maintenance password lockout

 

 Personal form

   

 

 

 

Differential mechanism

u Cycloid pin wheel differential

u Satellite differential

u hydraulic differential

feeder unit

u Feeder pipe with backflush function

         Applicable for material easily getting blocked

u screw feeding device

         Applicable for material of poor fluidity and high solid concentration