Case study 2 summary Implementing the high-level oxygen enrichment in this pro- ject allowed the unit to operate with the revised feed gas composition. Implementing high-level oxygen enrichment had the following advantages: u Minimum revamp needed. Existing equipment (burner and furnace) replaced in situ. New exchanger added in available space. No new plot area required. v Operational flexibility. Unit able to operate over a wide range of feed gas compositions by managing the level of oxygen enrichment. w No impact to the unit beyond the existing Claus furnace. Operating sulphur handling capacity post-revamp well below design values. Takeaways In conclusion, SRUs across the globe may need to upgrade to meet future demands. The most common requirement is the ability to process higher sulphur loads, as refineries across the globe are processing crudes with higher sulphur content and implementing residue conversion projects. Other adaptations are frequently required for processing more challenging feed ‘cocktails’, which may be encoun- tered when processing lean acid gas streams. Oxygen enrichment has proven to be a very successful engine for managing multiple requirements in SRUs, both for capacity enhancements and dealing with very chang- ing acid gas streams, as the case study data proves. These revamp options provide more efficient and cheaper options for operations compared to constructing new plants to cater to their new needs.
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Debopam Chaudhuri is a Process Engineer with Fluor Daniel India in New Delhi and is the Subject Matter Expert and a Fluor Fellow of sul- phur recovery processes. He has 23 years of experience in petroleum refining, petrochemical complexes, and upstream projects. Chaudhuri earned his BSc and BTech degrees in chemistry and chemical engi- neering from the University of Calcutta. Theresa Flood is a Process Lead Engineering Director and a Fluor Fellow for Sulphur Technology. She has 35 years of design experience in the sulphur recovery, gas processing, power, and petroleum refining industries. Flood’s sulphur recovery and tail gas treating technology specialties include modified Claus processes, ammonia destruction techniques, oxygen enrichment, hydrogenation amine, and SOx clean-up. Denny Li is a Principal Process Engineer with 18 years of experience in designing gasification, syngas, and sulphur technologies. His pro - ject development experience has ranged from technical and economic feasibility studies, process design packages, and front-end design through commissioning activities. Li has extensive experience in developing process simulations for syngas, gas treatment, and sulphur technologies. Jyoti Bist is a Process Engineer with Fluor Daniel India in New Delhi. She has 13 years of experience in FEED and detailed engineering pro- jects in petroleum refining and petrochemical complexes. Bist earned her BTech degrees in Applied Petroleum from University of Petroleum and Energy Studies, Dehradun.
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