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Products & Services - Centrifuge

[Sludge Dewatering Complete Equipment] [Solid-bowl Centrifugal Decanters] [Auto Control System]
[Sludge Feeding System] [Flocculant Adding System] [Sludge Transportation System]

Working Principle of High Dryness Decanter

Working Procedure
High dryness decanter can use limit space to fit together different stages of separation.
Mixing and Accelerating Stage
Sludge and chemical mixes in the specially designed feed chamber and accelerates together. This prepares the sludge for best separation.
Clarifying Stage
The flocculants sediments inside the bowl under centrifugal force, the clear liquid flows out of the weir at the end of the bowl.
Pressing Stage
Conveyor pushes the solid toward the discharge end. The sludge is further pressed by centrifugal force and the water comes out of the small holes of the sludge.
Double-direction Pressing Stage
In the conical part of the bowl wall, the sludge is pressed by specially designed double direction pressing effect. The specially designed conveyor produces axial pressing force and water comes out of the tiny holes of the sludge.
Control the Staying Time of Solid
In order to achieve best dewatering effect when flow rate or character of sludge changes, the solid content inside the bowl should be continuously controlled.This is controlled by the drive system of the conveyor. The drive system of the conveyor can measure real-time the solid content inside the bowl and adjust automatically, solid discharge torque automatically compensated.
Drive Technology

The reliable and excellent operation needs good cooperation of bowl drive and conveyor drive. Shanghai Centrifuge Institute researches good drive combination, which can be recommended as best design to suit different applications.

Bowl Drive System
Alternatives includes: - AC Motor + Frequency Converter
  - AC Motor + Hydraulic Coupling
  - Other Special Ways

Conveyor Drive System
Alternatives includes:
-
Frequency converter back of forward drive
DVF multi-level planet control
-
Hydraulic motor with individual hydraulic pump
-
Other Special Ways

Introduction

Sludge dehydrator-horizontal solid bowl decanter, is key equipment of sludge dewatering unit. It uses centrifugal force to sediment solid content in the mixture. It is fit for liquid solid separation of suspension liquid with solid particle equipment diameter≥3μm, solid liquid density difference ≥0.5g/cm3,and weight concentration ≤10% or volume concentration ≤70%.

Our product includes 9 series (LW220, LW300, LW400,LW450, LW530, LW650, LW760, and LW900)of more than 100 machine types.

The machine can also be sorted by bowl type, such as thickening, dewatering, classifying, clarifying and etc, to fit different kinds of separation.

Our institute can also design, configure and manufacture different equipment. The Mobile sludge dewatering truck can also perform test on customer site. Customers are also welcomed to bring sample to our institute for testing.

In recent years, our company has been cooperating with world-famous centrifuge company. SCL has developed decanter series with bigger length/diameter ratio. The sedimentation zone of bowl of this decanter series is longer and the separation effect is enhanced. For more than seven years, this decanter series has been exported to developed countries in Europe and America.

High Dryness Solid Bowl Decanter Specifications

Type Bowl LD
(mm)
High Speed
(r/min)
Bowl Length
(mm)
L/D RCF Capacity
(m3/h)
Max Slagging Cap
(m
3/h)
Motor Power
(kw)
Weigh
(kg)
Cont Dimension
(mm)
(L x W x H)
LW220×930NY 220 4800 930 4.2 2800 0.5~3 0.4 11 900 1790×1080×640
LW300×1300NY 300 4200 1300 4.3 3000 1~15 0.8 11~15 1400 2470×1230×850
LW350×1550NY 350 3700 1550 4.4 2600 2~20 1.2 15~22 1800 2790×1300×880
LW400×1750NY 400 3200 1750 4.4 2290 1.5~20 2.0 18.5~30 2200 2950×1400×850
LW450×1940NY 450 2800 1940 4.3 2030 4~50 2.5 22~37 2600 3300×1500×920
LW530×2270NY 530 2700 2270 4.3 2160 6~75 5.0 30~45 4000 3730×1600×1100
LW650×2800NY 650 2400 2800 4.3 2090 9~105 8.0 37~75 6500 4300×1900×1350
LW760×3040NY 760 2150 3040 4.0 2000 10~140 10.0 55~110 8500 5000×2500×1500
LW900×3600NY 900 2000 3600 4.0 2000 20~190 15.0 75`135 14000 6000×2700×1500
Notes:
1.
Actual capacity depends on character of mixture and treatment requirement.
2.
Maximum solid discharge capacity is calculated assuming that the differential speed is 10r/min and the sludge is pressed in two directions.
3.
Sludge feed concentration range is 0.5~0.6%.
4.
Parts contacting the mixture are made from AISI321 or AISI316 stainless steel.

High Speed High Dryness Solid Bowl Decanter Specifications

Type Bowl LD
(mm)
High Speed
(r/min)
Bowl Length
(mm)
L./D RCF Capacity Max Slagging Cap Motor Power Weigh Cont Dimension
LW220×930NY 220 5400 930 4.2 3500 0.5~5 0.4 11 900 1790×1080×640
LW300×1300NY 300 4600 1300 4.3 3500 1~15 0.8 11~15 1400 2470×1230×850
LW350×1550NY 350 4200 1550 4.4 3400 2~20 1.2 15~30 1800 2790×1300×880
LW400×1750NY 400 3800 1750 4.4 3200 3~30 2.0 22~37 2200 2950×1400×850
LW450×1940NY 450 3500 1940 4.3 3100 4~50 2.5 30~45 2600 3300×1500×920
LW530×2270NY 530 3200 2270 4.3 3000 6~75 5.0 37~55 4000 3730×1600×1100
LW650×2800NY 650 2800 2800 4.3 2800 9~105 8.0 45~75 6500 4300×1900×1350
LW760×3040NY 760 2500 3040 4.0 2600 10~140 10.0 75~132 8500 5000×2500×1500
LW900×3600NY 900 2250 3600 4.0 2500 20~190 15.0 90~200 14000 6000×2700×1500
Notes:
1.
Actual capacity is related to character of mixture and treatment requirement.
2.
Maximum solid discharge capacity is calculated assuming that the differential speed is 10r/min and the sludge is pressed in two directions.
3.
Sludge feed concentration range is 0.5~0.6%.
4.
Bowl material of above centrifuges is AISI329 stainless steel (centrifugally cast). Parts contacting the mixture are made from AISI321 or AISI316 stainless steel.