(187e) Safely Overcoming Capacity Constraints Challenges Using UOP Process Equipment and Callidus Flares
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, March 29, 2017 - 4:05pm to 4:30pm
Multi-point Ground Flares (MPGF) are the preferred technology for pressure relief in many ethylene plants. Like elevated flares, they provide a safe means of depressurizing the plant should an upset occur. Unlike elevated flares, proper design criteria have not been widely disseminated or discussed within the industry. Based on a series of performance studies conducted at the UOP Callidus multi-point flare test facility, engineering calculations, and computational fluid dynamics (CFD) models have been developed to provide greater insight into the design of MPGF. Various design inputs are discussed including physical test data and calculations, burner head design, plot space requirements, fence height requirements, and the number of stages required for correct operation. The resulting impact of the MPGF design on capital equipment cost, operating cost, environmental impact, and safety are highlighted.