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The ZSQ® Inlet Device is a low shear device, which substantially reduces the inlet momentum (into the very low hundred kg/ms² (Pa) at the outlet). It also promotes very early rapid degassing at the inlet end of the vessel, enhances oil recovery, whilst eliminating the potential for droplet shatter.

The ZSQ® Inlet Device provides both flow distribution and fluid processing, created by the small fluidic vacuum produced across each ZPC Vane around the ZSQ® Inlet Device. This causes the unusual characteristic of degassing with, what in lab tests have shown to be, bubbles of a very uniform size. These bubbles provide what is considered to be a "gas flotation effect" to the oil droplets allowing enhanced treatment of small oil droplets. Due to the slow spiral action of the flow exiting the ZSQ® Inlet Device, droplets have a longer time to rise to the surface, hence providing greater opportunity to coalesce with other droplets to form larger droplets, assisting in the separation process.

Advantages of the ZSQ® Inlet Device:

  • Ideal for degassing and provides excellent oil recovery performance
  • Makes the best use of the volume available for degassing
  • Handles high throughput and inlet momentum
  • Enhances interface level control
  • Provides a minimal pressure drop
  • Can operate with any orientation of the inlet nozzle
  • Not prone to blockage by solids
  • Wide operational range – typically, providing 100% turndown
  • Reduces the size of the inlet nozzle on a new build project
  • Allows a greater fluid throughput for a set nozzle size on a revamp project
  • Easy to install in new and existing separators
  • No moving parts, thus no maintenance.

Applications of the ZSQ® Inlet Device:

  • Produced Water Separators
  • Degassers
  • Surge Vessels
  • Skimmer Vessels
  • Enhanced Oil Recovery Systems
  • Floating Production Units (FPUs).

Case Studies

Upstream Piping

The upstream piping (or isometrics) will always dictate the condition of the flow entering the vessel. Special care should therefore be taken when designing the piping in a gas production system to minimize the risk of maldistribution and avoid the droplet shatter that could reduce the performance of the downstream separation internals. By modelling the isometrics with CFD, maldistribution can be reduced and the size of any droplets entering the separator can be predicted. This is useful for troubleshooting existing vessels and optimising the design of the process internals.

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