Abstract: Refinery dry gas contains a lot of hydrogen sulfide and carbon dioxide. In order to improve the dry gas desulfurization efficiency and the effect of the selective absorption desulfurization, in this paper, the super gravity rotating bed equipment was used as absorption desulfurization reactor instead of traditional absorption tower for experimental research. Rotating speed, absorbent dosage and absorption temperature were researched. The optimum operation parameters is: dry gas flow rate of 4 500 m3/h, the condition of pressure of 0.8 MPa, absorbent dosage of 8 m3/h, rotating speed of 800 r/min, absorption temperature of 40~45 ℃. A better absorption effect can be obtained, and hydrogen sulfide content in dry gas can be controlled to 0.01%, which satisfies the requirement of subsequent sulfur emissions. The results have shown that the shorter the retention time in the reactor is, the better the absorbent selectivity of hydrogen sulfide absorption effect is. Rotating bed reactor can replace traditional absorption tower.

Key words: The rotating bed, Dry gas, Methyldiethanolamine, Selective desulfurization

摘要： 炼厂干气含有大量H₂S和CO₂ 组分,为了提高炼厂干气脱硫效率,提高胺液选择性吸收脱硫的效果,采用超重力旋转床作为吸收脱硫反应器代替传统板式吸收塔进行实验研究。考察了旋转床转速、胺液流量以及吸收温度对脱硫脱碳吸收效果的影响。实验得出较优的操作条件:在干气流量4500m3/h,压力0.8MPa,胺液流量8m3/h,转速800r/min,吸收温度42~45℃的条件下,可以获得较好的吸收效果,吸收后干气中H₂S体积分数为0.01%,满足后续硫含量排放要求。结果表明,吸收剂在反应器中的停留时间越短,H₂S的选择性吸收效果越好;采用旋转床反应器可以代替传统板式吸收塔是可行的。

关键词: 旋转床, 干气, N-甲基二乙醇胺, 选择性脱硫