April 2021

Process Engineering

Design considerations when flaring ethylene oxide

The flaring of gases released from normal process vents and safety valve discharges following an overpressure scenario is widely practiced in refineries, petrochemical and chemical plants.

Suares, D. A. G., Gas Processing Consultant

The flaring of gases released from normal process vents and safety valve discharges following an overpressure scenario is widely practiced in refineries, petrochemical and chemical plants. In past projects, ground flares, elevated flare stacks or a combination of these two systems have been successfully used for the flaring of pure ethylene oxide (EO) or EO-rich streams. However, the flaring of pure EO or EO-rich streams requires certain additional precautions, as well as several stringent design and safety considerations due to it being unstable, toxic, highly reactive and flammable. In addition, EO was often vented off from high point vents directly to the atmosphere in many older plants.

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