Simultaneous Liquid A -Liquid B - Solids separationPIN-NL // PSE-NL - Spring Session 2017
ALEXANDER KRAUS, ENSCHEDE, 2017-04
• Principle of centrifugal separation
• Liquid – Liquid – Solid separation
• GEA machine portfolio used for centrifugal separation processes
• From spin tube to large scale process plants
Content
2Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Centrifugal force is produced through rotation around an axis. The force generated through the rotation acts in an outward direction. Depending on the speed of the rotating body, it increases or drops on the circular path.
Mechanical separation technology makes use of this property when light, heavy or substances of different density have to be separated from each other.
Centrifugal forces
3Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
The centrifugal forces act on all particles. The particles with the specifically higher weight are spun outwards fastest and most effectively. They then deposit on the edge of a container under centrifugal forces.
Centrifugal Forces in a Centrifuge
4
Settling speed depending on particle size under earth gravity
Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Disc stack centrifuges Decanter centrifuges Cyclones, Filter centrifuges
5.000 – 14.000 Clarification area up to
300,000 m² Separation of emulsions Compact design 3-phase separation
1.500 – 5.000 Clarification area up to
30,000 m² Separation of emulsions Compact design 3-phase separation
300 – 1.500 low clarification area
Emulsions not separable Compact design 2-phase separation only
Typical g-factors – centrifuges allow high separationcapacity by compact design
5Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
• Principle of centrifugal separation
• Liquid – Liquid – Solid separation
• GEA machine portfolio used for centrifugal separation processes
• From spin tube to large scale process plants
Content
7Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Settling tank for three phase mixture
8Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Mixture
Organic phase
Aqueous phase
Sludge: waste
Gravitation1 g
Characteristics• Large volume• Emulsions not
treatable• Low energy
consumption• Only for easy
separation tasks
Mixture
Comparison static settling – centrifugal separationwith disc stack separator
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Gravitation
1 g Centrifugalforces
7.000 g
2, 3 dischargeunder pressure
A solid bowl centrifuge (=decanter) is a sedimentation tank in a centrifugal field
From Tank to Decanter centrifuge
Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany 11
Crud Treatment in SX-Settler
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Separated aqueous phase
Separated organic phase
crud phase
Crud Treatment
13Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
FEED:crud phase
organic phase
aqueous phasesolid phase
Separating Decanter
14Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Separating zone diameter LP (Organic) discharge under pressure via centripetal pump
• Principle of centrifugal separation
• Liquid – Liquid – Solid separation
• GEA machine portfolio used for centrifugal separation processes
• From spin tube to large scale process plants
Content
15Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Machine portfolio – GEA Separators
16Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Gastight design3-phase designMaterials: Stainless Steel, Duplex, Super Duplex, Hastelloy/Incoloy cladding
Modular design: • Maximum flexibility• Perfect adaption for every application (e.g. flat and steep conical angle)• Large solid discharge diameters for optimum
dewatering of solids• Gastight design• 3-phase design
• Materials: Duplex, Super Duplex and Hastelloy C 276 WS
Range from CF 2000 – CF 8000• chemMaster• dryMaster• crudMaster
Machine portfolio - GEA Decanters
17Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
• Principle of centrifugal separation
• Liquid – Liquid – Solid separation
• GEA machine portfolio used for centrifugal separation processes
• From spin tube to large scale process plants
Content
19Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Liquid / Liquid / Solids separation
20Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
solid
aqueous
organic
Process DevelopmentFrom spin tube to large scale process plants
GEA offers a versatile range of test centrifugation services. After each test our customers receive a detailed report, quantifying the technical and economic benefits of the GEA solution.
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Example: TSE 40-01-577 on test-bay in Oelde/Germany for large customer in Chemistry
22Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Feed
TargetNo organics in sludge
Example: Better clarification of organic phase needed- combination with existing process
23Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
Mixture
Aqueous phase + solids
Organic phase + rest aqueous phase + traces of solids
Organic phase
TargetClear organicphase
Example: Replacement of settling tank by centrifuge, reduction of hold up and space
24Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany
TSE 40 Static settling tank
Space saving by using separators in comparison to static settling tanks. Separator bowl has only small hold up. In case hazardous liquids
are processed this is an advantage during operation and after shutdown. For separator CIP possible.
Better separation efficiency (1 g compared to several 1000 g)
~ 40,000 m² clarification area