DC Coalescer™

Discover the benefits of our DC Coalescer™ technology

Our DC Coalescer™ technology provides significantly lower settling times for primary dispersions with droplets as small as 30 microns.

View of a cut DC Coalescer™ for coalescing and draining
Main benefits
  • Enable debottlenecking of existing settlers
  • Reduction in size of 2-phase and 3-phase separators
  • Improves phase separation efficiency
  • Low droplet “cut-off” diameters, therefore extended range of operation. The lower limit is at or near the transition region from primary to secondary dispersions i.e. cut-off droplet diameter ~ 30-40 μm
  • Depending on the DC Coalescer™ type and application, high separation fluxes of up to 120 m3/m2h are possible
  • Applicable for primary dispersions
  • Equal performance independent of dispersed phase
Main applications
  • Separation of dispersions remained after water washing stages
  • Entrainment reduction of both phases in liquid-liquid extraction columns such as LPG amine treaters, hydrogen peroxide and caustic washers
  • Separation of dispersions formed by condensation following azeotropic distillation as in butanol / water distillation
  • Separation of liquids following steam stripping
  • Chemical industry
Key characteristics

Key characteristics

While the droplets pass through the Sulzer DC Coalescer™ they grow in size by a continuous process of coalescing and draining. The faster settling velocity of coalesced droplets leads to minimized vessel dimensions compared to simple gravity separation.

The Sulzer DC Coalescer™ uses a combination of two materials with widely varying surface-free energies – typically metal and plastic – to enhance the droplet coalescence of either phase. Therefore, co-knitted Sulzer DC Coalescers™ outperform single medium alternatives.

Technical specifications

Technical specifications

  • Sulzer DC Coalescers™ can be installed both vertically and horizontally.
  • Their shape and fixing method is customized to the vessel or housing.
  • A wide variety of materials and knitting types offer a tailor-made solution wherever efficient liquid-liquid separation is required.
How can we help you?

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