Abstract
In the present study, effect of a parameter for increasing the reaction furnace temperature and sulfur recovery of Claus sulfur recovery units (SRUs) is investigated by TSWEET process simulator based on Gibbs free minimization. The effect of oxygen enrichment on the reaction furnace temperature and sulfur recovery has been studied by proposed simulator. In the case of the effect of O2 concentration, temperature of main burner increased monotonically. It is found that sulfur recovery (in the O2 high concentrations) increases up to a maximum value and then decreases with increase of O2 concentration, while this is not the case for O2 low concentrations.
Highlights
Sulfur recovery unit (SRU) is an important unit in natural gas processing units
A part of the feed stream is sent to the main burner, and another part is sent to the acid gas heater. 1/3 of H2S in the acid gas is oxidized to SO2 at the main burner using outlet air of air blower
A second role of the reaction furnace is to ensure of the destruction of other contaminants of the acid gas feed stream
Summary
Sulfur recovery unit (SRU) is an important unit in natural gas processing units. It removes H2S from acid gas feed before they can be released into the environment [1]. H2S exists mainly as an undesirable by-product of gas processing units [2]. Different processes are applied to recover sulfur from H2S. The most widely used process is Claus process [1,3]. It should be noted that several modifications were developed on the main Claus process in order to increase the overall sulfur recoveries
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