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Study of reducing emission concentration of SO_2 in tail gas from sulphur recovery unit

LIU Aihua;LIU Jianli;TAO Weidong;LIU Zengrang;Research Institute of Qilu Branch,SINOPEC;  
Systematic study is conducted on how to reduce concentration of SO2 in tail gas from sulphur recovery unit by analyzing the factors influencing emission concentration of SO2 in tail gas. The concentration of SO2 in tail gas depended on total sulphur content of purified tail gas and off gas of liquid sulphur degassing. Both of amine and catalyst performance were the important influencing factors. The concentration of SO2 in tail gas was reduced to 50-150 mg / m3by adopting new liquid sulphur degassing and off gas disposal process.
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