摘要
介绍了中国石油云南石化有限公司140万t/a汽油加氢装置催化剂湿法硫化过程中出现的循环氢中H2S含量高、选择性加氢脱硫催化剂床层温度突然升高等异常情况,分析了上述问题产生的原因,并采取了相应的对策。结果表明:注入过量硫化剂导致循环氢中H2S含量高,通过以75 t/h的处理量引入直馏石脑油4 h,可使循环氢中H2S体积分数从2.880%降低至0.012%;选择性加氢脱硫催化剂初期选择性不佳导致催化剂床层温度突然上升,采取将反应空速从1.8 h-1增大至2.5 h-1,并逐步提高反应器入口温度及控制反应温升的对策,经过24 h的缓慢钝化,反应器出口最高温度控制在273℃,两端床层总温升控制在不超过43℃。
The anomalies such as high content of H2S in recycle hydrogen and sudden increase of selective hydrodesulfurization catalyst bed temperature in the process of wet sulfuration for catalyst were introduced in a 1.4 Mt/a gasoline hydrogenation unit of Yunnan Petrochemical Co Ltd, PetroChina. The causes for those problems were analyzed and the corresponding countermeasures were adopted. The results showed that the excessive injecting of sulfurizing reagent led to high content of H2S in recycle hydrogen, and the volume fraction of H2S in recycle hydrogen decreased from 2. 880% to 0. 120% by introducing straight -run naphtha of 75 t/h for 4 h. Poor selectivity of selective hydrode sulfurization catalyst during initial period led to sudden rise of catalyst bed temperature. The corresponding countermeasures were adopted, such as the space velocity of reaction increased from 1.8 h^- 1 to 2.5 h^- 1, the inlet temperature of reactor increased gradually and the reaction temperature rising were controlled, after 24 h slow passivation, the highest exit temperature of reactor was controlled at 273 ℃ and the total temperature rising at both ends of the bed was controlled under 43℃.
作者
冯连坤
陈晓华
冯连朋
FENG Lian - kun, CHEN Xiao - hua, FENG Lian - peng(Yunnan Petrochemical Co Ltd, PetroChina, Kunming 650399, Chin)
出处
《石化技术与应用》
CAS
2018年第2期128-131,共4页
Petrochemical Technology & Application
关键词
汽油加氢
加氢催化剂
湿法硫化
H2S
汽油脱硫
选择性
床层温度
gasoline hydrogenation
hydrogenation catalyst
wet - processsulfurization
hydrogen sulfide
desulfurization of gasoline
selectivity
bed temperature
