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    Separation solutions
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    With a no failure record,
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The ZP-210 Vane Type Demisting Device offered by Zeta-pdm Ltd can be utilised in both horizontal and vertical separators and consists of high efficiency double “pocket" or "trough" type vanes, where the agglomerated sheet of liquid flows into the vertical vane troughs, which extend over the complete width of the vane pack, perpendicular to the horizontal gas flow.

The "trough" is shielded to partition the falling liquids (inside the drainage chambers) from the main gas stream flowing within the vane blades, thus minimising any re-entrainment of the separated fluids.

After running into the liquid collector, the liquids are then drained into the bulk liquid within the separator, returning to a level below the lowest liquid level, i.e. below the Low Low Liquid Level (LLLL), via a liquid "downcomer" system.

Advantages of the ZP-210 Vane Type Demisting Device:

  • Offers a high gas / liquid separation efficiency at high operating pressures
  • Low re-entrainment
  • Handles high throughput
  • Handles high liquid loading
  • Low pressure drop
  • Robust construction
  • Reduces the vessel size on a new build project
  • Allows a greater fluid throughput for a set vessel size, on a revamp project
  • Easy to install in new and existing separators
  • No moving parts, so no maintenance.

Applications of the ZP-210 Vane Type Demisting Device:

  • Production Separators
  • Test Separators
  • Gas Scrubbers
  • Gas Knock-out Drums
  • Slug Catchers
  • Flash Drums
  • Process Vessels and Columns
  • Floating Production Units (FPUs).

Case Studies

Slug Catcher Flow Assurance

Gas production systems may operate in the "slug flow" multiphase regime in which large volumes of liquid are interspersed with the gas. Under these conditions, the arrival of the liquid slugs can be detrimental to separation performance and the mechanical stress levels are greatly increased. In the example shown below, Zeta-pdm was asked to analyse the failure of a slug catcher vessel. Inspection showed that the slugs had caused mechanical failure of the separation internals. Subsequently, a simulation study yielded a vastly improved understanding of the flow behaviour, enabling Zeta-pdm to recommend internals better able to withstand severe operating conditions.

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