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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.

The Goal

To design a baffle arrangement that controls sloshing, allowing separation to continue by:-

  • Minimizing disturbances to the phase interfaces.
  • Reducing liquid carry-over into the gas stream.
  • Reducing gas carry-under through the liquid outlets.
  • Preventing the movement of water over the weir plate into the oil stream.

The graphic shows the gas / liquid interface in a primary horizontal 3-phase separator. Parts shown in pale blue are solid plates, parts coloured dark blue are porous baffles and the gas / liquid interface is shown in red.

The graphic shows sloshing in a gas scrubber contained by the vertical porous baffle and a containment ring. The motion control in the gas scrubber has to prevent gas carry under and liquid re-entrainment back into the gas stream.

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Energy industry specialist joins forces with engineering and management consultant

Leading energy industry specialist Zeta-pdm Ltd has formed a collaborative alliance with an engineering and management consultancy company.

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