PSV and Flare Analysis – Fractionation Plant

Evaluation of relief device and system sizing for a gas fractionation plant

As part of a plant debottlenecking effort, Vega Oil and Gas Consulting evaluated the existing relief device, Knock Out Drum (KOD) and flare sizes relative to the higher plant throughput rate.

• Reviewed existing relief valve analyses and flare header analysis
• Re-evaluated rate dependent overpressure scenarios at higher throughput rate including inlet and outlet pressure drop analyses
• Determined “pinch” reboiler duties associated with various column to estimate realistic relief rates
• Re-evaluated KOD and flare radiation
• Proposed mitigation options to resolve deficiencies to meet higher throughput rate