The power of a tuned SRU Dynamic Simulator

By Inshan Mohammed of Sulfur Recovery Engineering


During the design phase, Process Engineers utilize predictive simulation modeling to study system behavior and to create heat and material balances for Sulfur Recovery Units (SRUs). Commercial simulators produce adequate steady-state models, however SRE’s ‘tuned’ SRU dynamic model takes the simulation study to the next level for plant Engineering and Operations staff. SRE uses VMGSim Dynamics as a simulation platform, and with onsite testing and data collection, a high fidelity, tuned model can be created. With this tuned model, the following objectives can be achieved:

  • The effect of operating an SRU at different capacities (volumetric flow rate and/or acid gas quality)
  • The identification of equipment pinch points
  • The study of blower performance
  • The identification of SRU tuning parameters
  • The study of the behavior and the capability of control valves

This paper illustrates the power and potential of a high fidelity, tuned SRU model with respect to the above. Here, the behavior of a typical 400 metric tonnes per day (TPD) sulfur train is evaluated at different capacities. Furthermore, a tuned model is a beneficial tool for the study of alternate SRU configurations, as well as for the training of plant personnel, helping them to understand the impact of actions performed at the control panel.

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