Abstract
Environmental and economic considerations have increased the use of gas recovery systems. Regarding our comprehensive process evaluation in 11 oil and gas refineries, we devised practical methods to approach zero flaring. This paper presents the results of two case studies of reducing, recovering and reusing flare gases from the Tabriz Petroleum Refinery and Shahid Hashemi-Nejad (Khangiran) Natural Gas Refinery, both in Iran. The design considerations, economics of the process and system operation are studied in this paper. Flare gases are compressed and returned to the fuel gas header for immediate use as fuel gas. Flare gas recovery reduces noise and thermal radiation, operating and maintenance costs, air pollution and emission, and fuel gas and steam consumption. Process stability and flare tip increment without any impact on the existing safety relief system are also the effects of the flare gas recovery system.
Highlights
Worldwide, final product costs of refinery operations are becoming proportionally more dependent on processing fuel costs, in the current market, where reduced demand results in disruption of the optimum energy network through slack capacity [1]
Advantages are obtained from reduced flaring pollution and extended tip life [1]
Recovery of hydrocarbon gases discharged to the flare relief system is probably the most cost-beneficial plant retrofit available to the Shahid Hashemi-Nejad (Khangiran) gas refinery and the Tabriz petroleum refinery
Summary
Final product costs of refinery operations are becoming proportionally more dependent on processing fuel costs, in the current market, where reduced demand results in disruption of the optimum energy network through slack capacity [1]. To achieve the most cost-beneficial plant, the recovery of hydrocarbon gases discharged to the flare relief system is vital. Heaters and steam generation fuel provision by flare gas recovery leaves more in fuel processing and yield increment. Flare gas recovery in oil and gas refineries are going to be neglected. In the present work, investigations were made into the operational conditions of 11 important refineries and petrochemical plants. We devised practical methods to reduce, recover and reuse flare gases for each petroleum refinery, natural gas refinery and petrochemical plant.
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