液化气脱硫醇装置碱液再生高硫尾气的净化处理

液化气脱硫醇装置碱液再生单元的尾气硫含量较高，直接送至常减压蒸馏装置加热炉伴烧时将引起加热炉排放烟气中的SO₂浓度大幅上升，无法满足环保要求。通过对再生尾气进行离线模拟吸收试验，发现催化裂化柴油对再生尾气中的硫化物具有良好的吸收效果。依据试验结果对再生尾气系统进行脱硫改造，改造后加热炉外排烟气中的SO₂浓度大幅降低，满足国家和地方的相关排放标准要求。

PURIFICATION OF HIGH SULFUR TAIL GAS FROM CAUSTIC REGENERATION OF LPG SWEETENING UNIT

Due to the high content of sulfur in tail gas from caustic regeneration unit of LPG sweetening unit，the concentration of SO₂ in the flue gas of heating furnace will increase greatly when it is sent directly to the heating furnace of atmospheric and vacuum distillation unit. The results of off-line simulated absorption experiments showed that FCC diesel had a good absorption effect on sulfur compounds in the regeneration tail gas. According to the test results, the flue gas desulfurization system was reformed, and the SO₂ concentration in the flue gas discharged from the heating furnace was greatly reduced, which could meet the relevant national and local emission standards.