Case Studies Increasing Capacity in Sulfur Production Using Sulsim Modeling
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Increasing Capacity in Sulfur Production Using Sulsim Modeling

Analytics & Modeling - Digital Twin / Simulation
Oil & Gas
Process Manufacturing
Process Control & Optimization
Data Science Services
Siirtec Nigi, an engineering and contracting company, was tasked by one of their customers to nearly double sulfur production capacity. The challenge was to find the optimal level of oxygen enrichment and set up controls to increase sulfur recovery unit capacity. The customer was anticipating expensive changes with a huge impact on equipment and processes. The key challenge was determining an operating envelope for optimal operations.
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Siirtec Nigi is an engineering and contracting company providing a range of services around oil and gas treatment, sulfur recovery, and acid gas removal. Their customers include many oil and gas companies and other international EPC contractors, both onshore and offshore. One of Siirtec Nigi’s customers wanted to nearly double sulfur production capacity.
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Siirtec Nigi used Aspen HYSYS to simulate the case study, conduct sensitivity analysis, and define a window of operating conditions. The simulation validated the original heat and material balance created using a different tool. Based on the HYSYS model, Siirtec Nigi proposed an increase from 50 ton/day to 90 ton/day in sulfur production capacity that required only minor equipment upgrades. The upgrades can be completed during a normal turnaround, rather than scheduling an additional, costly shutdown because the simulation showed the minimal changes required to achieve the desired outcome.
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Sulsim allowed Siirtec Nigi to validate the existing operation and simulate their proprietary technology.
The new process called for minimal equipment changes.
Adjustments can be executed during turnaround with no additional downtime.
Increased sulfur production per day from 50 ton/day to 90 ton/day.
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