In order to meet the requirements of environmental protection target,reduce the S02 content in FCC flue gas and improve the tail-trailing phenomenon of blue flue gas,sulfur transfer agent(CSC)was added into the flue gas of a 1.2 Mt/a FCC unit in a certain refinery.The content of SO2 in flue gas was reduced from 850 mg/m3 to 350 mg/m3.The S02 in flue gas outlet was further removed by the wet desulphurization process(EDV)of USA Berge Company,the emission target was realized and the flue gas trailing phenomenon was also greatly alleviated.By calculation,the efficiency of sulfur transfer agent could reach 58.82％.After using sulfur transfer agent,the annual cost of lye could be saved by 2.688 2 million yuan.At the same time,there was no need to add new equipments.Accordingly,addition of sulfur transfer agent in flue gas was an efficient,economic and environmental protection means.The commercial appli-cation also showed that sulfur transfer agent had no adverse effect on the product distribution and catalyst fluidization.
sulfur transfer agentblue smoke tailSO2sulfuric acid fog
NETL
NSTL
万方数据
