higher sulfur flow from the fourth sulfur seal, compared to the flow from the third seal.
Conclusions
Figure 5. Evidence of sulfur from the demister box in URA2 Third Condenser C-1644.
TGSim PlusTM
Comprimo performed a thorough technical review of the sulfur complex at the ENAP Aconcagua refinery to determine what design, operations and maintenance practices could be limiting its ability to meet processing run lengths and environmental targets on a continuous basis. The review provided ENAP with a better understanding of the design limitations of its existing units, and how it could operate to ensure it was meeting required emissions targets set by the government. Comprimo provided clear key performance indicators (KPIs) for all of the units, which will allow the operators to maintain the units within the recommended operating limitations, thereby maintaining better performance and longer life. One of the main conclusions of the review was a lack of understanding of the importance of proper heating of the piping and equipment in a sulfur plant. It is essential to have the design of the heating system of a sulfur recovery carried out by an experienced company that is well-versed in the calculation of heat losses in a system where sulfur freezes below 120 °C (248°F). In part two of this article, Comprimo and ENAP will discuss the findings during their most recent turnaround of URA2 and outline how this improved the overall emissions from the refinery’s sulfur block.
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