Alfa Laval Decanter Centrifuge
Table of Contents
Decanter Centrifuge – What is it?
A decanter centrifuge is a heavy duty, industrial separating machine. It separates solids from one or two liquids using centrifugal force. Solid particles need to have higher density than the liquid for a decanter centrifuge to work. Stoke’s law determines the separation efficiency.
How Does a Decanter Centrifuge Work?
Types of Decanter Centrifuges
2 Phase Decanter
3 Phase Decanter aka Tricanter
Decanter Centrifuge – Generic Specifications
The following table lists some of the important technical specifications of decanter centrifuge. Of course, each manufacturer has a slightly differentiated specification. In general, high quality, decanter centrifuges have similar properties.
|Material of Construction (MOC)||316L Stainless Steel (established, high quality brands)|
|Max. Bowl RPM||2,000 ~ 6,500|
|Bowl Diameter||6" to 60"+|
|G-Force (Centrifugal Force)||4500 G's Max.|
|Particle Size Separation Range||50 µm to 1/2"|
|Processing Capacity||5 GPM to over 1,500 GPM|
|Drive Power||5 HP to Over 150 HP|
|Size (Footprint)||2' x 4' to 8' x 15'|
|Differential Speed||1 ~ 25 RPM|
|Gearbox Type||Planetary Gearbox; 1 kN-M to 3.5 kN-M Torque|
Decanter Centrifuge – Sizes & Capacities
Prospective buyers should consider the some important aspects listed below.
Decanter centrifuges are considered capital equipment based on their expected operating life and durability. Decanter centrifuge price depends on the manufacturer and size/capacity.
A new decanter centrifuge (from a quality, established manufacturer) starts from around $50K for a small capacity decanter to over $500K for a large capacity machine. Accessories such as explosion proof upgrades, control systems, pumps etc. are optional and add to cost.
Re-manufactured decanter centrifuge price ranges from 40% to 60% compared to new decanters of similar capacity.
Decanter centrifuge operating costs can categorized as follows.
Decanter Centrifuge – New versus Remanufactured
Important considerations before buying a remanufactured decanter centrifuge
- Manufacturer of original decanter centrifuge
- Credentials & experience of the remanufactuer
- Previous use of decanter
- Wear status of decanter bowl and conveyor
- Parts used in the rebuild – especially bearings
- Balancing of major rotating components
- Vibration check of complete testing of decanter centrifuge assembly per OEM specifications
Decanter Centrifuge Applications
Decanter centrifuges are primarily used for separation of liquids from high amounts of solids. In real terms, they can separate over 50% (v/v) solids from liquids on a continuous basis. Decanter centrifuges can produce up to 4000 g’s of centrifugal force which is sufficient to separate particles down to 50µ on continuous basis.
Following are some of the applications we have supplied decanter centrifuges for: