催化干气胺法脱硫工艺的优化

The Optimization of Catalytic Cracking Dry Gas Amine Desulphurization

阐述了湿法脱硫技术及其装置流程,并对干气脱硫装置的工艺条件参数进行了优化。优化结果表明:催化干气采用湿法脱硫工艺进行脱硫处理,在脱硫塔操作温度小于44℃,贫胺液流量8~16 t/h,贫胺液中H2S浓度小于0.2 g/L时,脱硫效果较好,干气中的硫化氢浓度降至20 mg/m3(标准状态,以下同)以下,脱除率达99.6%。加热炉排放烟气中的SO_2浓度降至39 mg/m^3以下,低于排放指标,消除了下游装置的露点腐蚀问题,常压炉热效率提高至92%以上。

This paper describes the wet desulphurization process and the optimization of the dry gas desulfurization process. The optimization results show that wet desulfurization process for catalytic cracking gas can obtain good desulfurization efficiency under the condition of less than 44 ℃ temperature in the desulfurization tower and less than 0.2 g/L H2S concentration in the dry gas, with HaS concentration in dry gas down to 20 mg/m3 and removal rate up to 99.6%. The SO2 concentration in the flue gas of the heating furnace is also reduced to below 39 mg/m3, lower than the emission target, helping eliminate the dew point corrosion in downstream devices and improve thermal efficiency of the normal pressure furnace to more than 92%.