|
|
|
Order high-quality repints of any articles on this website
|
|
|
|
|
|
Visual Dynamic Modelling
Introduction
The theoretical design for a process vessel does not in itself produce an optimum vessel design and configuration, due to the potential for non-ideal flow patterns and hydraulic behaviour within the vessel. In order to develop a suitable overall theoretical and actual design, the techniques of Visual Dynamic Modelling (VDM) are utilised to corroborate a theoretical design with a hydraulic effectiveness as close to the ideal as possible. This technique has been shown to be valuable and is well proven in these situations, in order to optimise and debottleneck existing vessels.
All VDM modelling was performed at the Opus facility in Flotta, Orkney.
Separator Modelling
Modelling Objectives
The following table details the important zones within the Separator where VDM can be applied, the objectives for each of the zones of the unit are as follows:-
| Zone Description |
Objectives |
| Inlet Zone |
Preserve stratified fluids as much as possible
Achieve early gas release
Achieve effective dissipation of energy |
Liquid / Gas Interface
and Liquid Level |
Minimise fluid maldistribution at the transition to the liquid pool
Optimise the fluid residence times in the liquid pool
Identify and correct any undesirable fluid behaviour in the liquid
pool such as channelling, recirculation, underpassing of internals. |
| Gas Release |
Optimise gas disengagement from the inlet zone and liquid dropout. |
A Separator model is constructed to a scale (580mm inside diameter) of the full-size unit and process conditions for the modelling are related to this scale factor on an appropriate basis for the particular objective being studied.
VDM was performed at comparative Reynolds Numbers for all cases at the inlet nozzle and at an equivalent GLR (Am3/Am3)
|
|
|
|
|
Download PDF