Flaring networks assessment in South Pars Gas processing plant

In the oil and gas industry, flaring is considered to be a safe and reliable method for disposal of residual gas or depressurization of a fire zone. The classification of process and utilities units in different fire zones is a basis for the evaluation of the flare sizing load because of depressurization events in a gas refinery. Present paper focuses on flaring network in five gas processing plants of South Pars with different fire zone classification. The maximum flaring loads are calculated and reported for these refineries. Results show that the different flare sizing load is due to different fire zone arrangement. In addition, three case studies in relative flaring networks such as fuel gas consumption in second refinery, hydraulic calculation of flare header in third refinery and flare radiation in second refinery are surveyed. The adjustment of fuel gas consumption was conducted after the flare network back pressure which has been calculated in second refinery by a Flare Net simulator. Moreover, the sizes of sub-header/header HP flare in third refinery is established based on Flare Net simulation, and PHAST simulation results are rejected the installation of a DMC unit in second refinery because of radiation limits.