Chinese

Decanter centrifuge

LWS decanter centrifuge (three-phase separation type)

2018-10-12 14:51:37 Visit:

Working principle 
      
     Once the suspension fed into the centrifuge drum via feed pipe, solid phase of it of higher density will be settled down and attached to wall surface of the rotor drum under effect of centrifuge field, which will be screw pushed to drying area before it’s discharged via slag outlet, the clarified liquid phase of it will be overflowed via the overflow port of the rotor drum, hence to realize solid and liquid separation. 
Be noted that LWX is to be discharged via centripetal pump, LWS is three-phase separation type and LWF is explosion-proof type.


 Main features
Components/parts including drum and screw etc that will be in contact with the feedstock are made of corrosion resistant stainless steel, duplex steel or C22 according to the working condition.            
◆ High precision rotary drum (NC machining, high-precision balance), high separation factor, improved separation efficiency.            
◆ Dual variable frequency common DC bus control, step-less velocity adjustment of drum and screw; 
◆ A variety of lubrication methods: grease lubrication (standard), oil injection lubrication, oil and gas lubrication.            
◆ Fully automatic oil recharging device            
◆ Surface of the spiral vane is sprayed with wear-resistant alloy or welding hard alloy. 
◆ Different differential mechanism is equipped for different working conditions, i.e. cycloid pin, planet gear or hydraulic differential.            
◆ Fully enclosed system satisfying specification of pharma production
◆ Multiple layers of protection including over-vibration protection, cover opening protection, motor overload protection, differential speed/torque control and switch, bearing temperature detection, screw pushing torque protection, static grounding protection and locking protection for maintenance
◆ N2 protection system and relevant ex-proof measures are equipped to satisfying ex-proof specification 
◆ Can be core part of a waste water treatment system once combined with flocculant dosing system, screw pump, flow meter and other fittings 


Customization form

机型

转鼓形式

螺旋叶片

向心泵

差速器

防爆

LW

标配:离心铸造

选配:板材成形

标配:硬质合金镶片选配:喷涂硬质合金

常规:无

标配:行星齿轮

选配:摆线、液压

LWF

LWX

LWXF

标配:离心铸造

选配:板材成形

标配:硬质合金镶片选配:喷涂硬质合金

LWXF

LWS

LWSF

标配:离心铸造

选配:板材成形

标配:硬质合金镶片选配:喷涂硬质合金

LWSF

 
Centrifugal casting of rotor drum
◆ The rotor drum is made by means of centrifugal casting and solution treatment, which means better stability  
◆ Higher strength 
◆ Can be made of various material including 304、316L、2205、C22、C276 


Screw wear-resistance treatment
◆ Cemented carbide insert
        Tungsten carbide alloy
        Built-in structure 
◆ Cemented carbide coated surface 
        Tungsten carbide coated 



Differential mechanism
◆ Cycloid pin wheel differential 
◆ Planetary gear differential 
       Larger torque output
       Stable and reliable operation
◆ Hydraulic differential mechanism 
       Better low differential output
       Differential stepless adjustable
       Compact structure


 
Sealing performance
◆ Shaft seal design
        ensuring effective separation between the working cavity and bearing cavity 
◆ Flexible joint for slag discharge and transfer connection 
         Flexible joint or transfer connection for option of installation design


 Three phase separation
 
◆ Applicable for solid-liquid-liquid separation
◆  Heavier liquid to be discharged by centripetal pump (Liquid level adjustable)
◆ (lighter liquid to be overflowed via overflow port of the rotor drum (liquid level adjustable)
 
 

Technical parameter

项目 LW220x880 LW350x1400 LW450x1800

LW450x2025
LW530x2120

LW530x2650
LW650x2600

LW650x2925
LW1000x3000
转鼓直径mm 220 350 450 530 650 1000
长径比 4 4 4/4.5 4/5 4/4.5 3
转鼓转速r/min 5000 4200 3500 3000/2800 2700/2500 1600
分离因数 3077 3454 3084 2669/2325 2651/2273 1432
主电机功率kw 11 22 30-37 45-55 75/90 132
主机重量kg 1100 2050 3500/3800 4200/4500 8000/9500 12000

 Ratio of length to diameter shown in above Table are generic parameter, which is subject to adjustment base on actual working conditions in order to achieve satisfying performance of separation. 

Explosion-proof and sealing
◆ Sealing of the whole system
◆ Shaft seal design 
◆ N2 protection system
◆ Slag discharge connection/joint
◆ Explosion proof and separation measures
   (Refer to Application of Ex-proof Technology for detail)
 

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