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Simultaneous Liquid A - Liquid B - Solids separation · PDF file A solid bowl centrifuge (=decanter) is a sedimentation tank in a centrifugal field From Tank to Decanter centrifuge

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Text of Simultaneous Liquid A - Liquid B - Solids separation · PDF file A solid bowl centrifuge...

  • Simultaneous Liquid A - Liquid B - Solids separation PIN-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 separation capacity 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

    Gravitation 1 g

    Characteristics • Large volume • Emulsions not

    treatable • Low energy

    consumption • Only for easy

    separation tasks

  • M ixture

    Comparison static settling – centrifugal separation with disc stack separator

    9Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany

    G ravitation

    1 g C entrifugalforces

    7.000 g

    2, 3 discharge under 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

    12Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany

    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 design 3-phase design Materials: 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 Development From 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.

    21Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany

  • 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

    Target No 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

    Target Clear organic phase

  • 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

  • gea.com

  • Separation technology: disc stack centrifuge

    26Simultaneous Liquid/Liquid/Solids separation, Alexander Kraus, GEA Germany

    Simultaneous Liquid A - Liquid B - Solids separation Content� Centrifugal forces� Centrifugal Forces in a Centrifuge� Typical g-factors – centrifuges allow high separation capacity by compact design Content� Settling tank for three phase mixture Comparison static settling – centrifugal separation with disc stack separator Dianummer 11 Crud Treatment in SX-Settler Crud Treatment Separating Decanter Content� Machine portfolio – GEA Separators Machine portfolio - GEA Decanters Content� Liquid / Liquid / Solids separation Process Development�From spin tube to large scale process plants Example: TSE 40-01-577 on test-bay in Oelde/Germany for large customer in Chemistry� Example: Better clarification of organic phase needed - combination with existing process Example: Replacement of settling tank by centrifuge, reduction of hold up and space Dianummer 25 Separation technology: disc stack centrifuge

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