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An investigation of reaction furnace temperatures and sulfur recovery

Frontiers of Chemical Science and Engineering 2011年第3期5卷 362-371页

作者： S.ASADI m.PAKIZEH m.pourafshari chenar Chemical Engineering Department Faculty of EngineeringFerdowsi University of MashhadMashhad P.O.Box 91775-1111Iran

In a modern day sulfur recovery unit(SRU),hydrogen sulfide(H_(2)S)is converted to elemental sulfur using a modified Claus unit.A process simulator called TSWEET has been used to consider the Claus *** effect of the H_(2)S concentration,the H_(2)S/CO_(2) ratio,the input airﬂow rate,the acid gasﬂow of the acid gas(AG)splitter and the temperature of the acid gas feed at three different oxygen concentrations(in the air input)on the main burner temperature have been *** the effects of the tail gas ratio and the catalytic bed type on the sulfur recovery were *** bed temperatures were optimized in order to enhance the sulfur recovery for a given acid gas feed and air *** when the fraction of AG splitterﬂow to the main burner was increased,the temperature of the main burner increased to a maximum but then decreased sharply when theﬂow fraction was further increased;this was true for all three concentrations of ***,if three other parameters(the concentration of H_(2)S,the ratio H_(2)S/CO_(2) and theﬂow rate of air)were increased,the temperature of the main burner increased *** increase had differ-ent slopes depending on the oxygen concentration in the input ***,by increasing the temperature of the acid gas feed,the temperature of the main burner *** general,the concentration of oxygen in the input air into the Claus unit had little effect on the temperature of the main burner(This is true for all parameters).The optimal catalytic bed temperature,tail gas ratio and type of catalytic bed were also determined and these conditions are a minimum temperature of 300°C,a ratio of 2.0 and a hydrolysing Claus bed.

关键词： Claus unit concentration of H_(2)S tail gas ratio sulfur recovery catalytic bed

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