Operating principle

Working principle of LWL Horizontal screw

The suspension will be fed into rotor drum via feed pipe firstly through the filtering cavity between the rotor drum and screw and then cone bottom of the rotor drum. Under effect of centrifugal force, liquid content of the suspension will be filtered out via the filter net in the rotor drum while the solid content retained in the drum which will be forced to move from smaller end of the drum to the larger end under effect of the centrifugal force as well as differential between the screw and rotor drum. As rotating diameter of the drum increases, the centrifugal force increases, which reduces moisture content of the solid (which is high at beginning) to a level as low as possible before discharge, 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 is, the better effect of rinsing and the lower consumption of detergent would be.

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.

LWL horizontal decanter is especially suitable for processing material of appropriate size as it' s capable of continuous filtration in a highly efficient way and allows continuous feed and discharge process.

 

LWL 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

 

LWL Cone angle of rotor angle

u Smaller cone angle allows the rotor drum to achieve better washing performance

u Larger cone angle allows the rotor drum to process more

u Suitable cone angle may be selected for specific nature/characteristics of the material

 

 

LWL Wedge-shaped filtering net

u Wedge-shaped net made of trapezoidal wire containing a straight-line  "b", resulting in a longer wear-out-failure period

u With minimum gap/clearance("a")of 0.05mm

u Select the most suitable material for the net depends on the material to be filtered and working conditions: 304、316L、2205、 C22、C276.

u Harden treated trapezoidal wire with better abrasive resistance

 

 

 

 

 

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