Improvement of operating conditions and composition of streams in gas condensate stabilization unit with the aim of reducing flare gas in Sarkhon and Qeshm gas plant

Abstract

The gas condensate is one of the most valuable products of gas refineries. In unit 700 of the Sarkhon gas refinery, first, the gas condensate is separated from the feed. Then, the vapor pressure of the gas condensate is stabilized by de-ethanizer and de-butanizer towers. The H-701 and H-702 furnaces act as reboilers of the towers. In this research, unit 700 is simulated by HYSYS software. The product of this unit is examined to achieve desirable conditions. In addition, the best conditions are obtained to reduce the gas loss in this unit. The desirable conditions are introduced according to the operational problems of this unit. In this study, the environmental and economic loss due to the loss of hydrocarbons from the de-butanizer tower is identified. Results of this research show that the best operating temperature and pressure of the first feed are 40 °C and 29 bar, respectively. Also, the best temperature and pressure of the second feed are 20 °C and 28 bar, respectively. Also, the best temperature and pressure of the output stream from the S-701 as a feed of the T-701 are 34.35 °C and 22.51 bar, respectively.