乙烯工业 ›› 2020, Vol. 32 ›› Issue (4): 60-64.

• 三剂 • 上一篇    

乙烯装置碳二前加氢催化剂运行状况分析

马时霖,秦海良,王晓刚   

  1. 中国石油天然气股份有限公司兰州石化分公司,甘肃 兰州 730060
  • 收稿日期:2020-04-24 修回日期:2020-10-20 出版日期:2020-12-25 发布日期:2021-01-04
  • 作者简介:马时霖,男,2009年毕业于大连理工大学化学工程与工艺,学士,主要从事乙烯生产工艺技术管理相关工作,工程师。

Operation Analysis of C2 Hydrogenation Catalyst in Ethylene Plant

Ma Shilin, Qin Hailiang, Wang Xiaogang   

  1. PetroChina Lanzhou Petrochemical Company, Lanzhou, Gansu, P.C.730060
  • Received:2020-04-24 Revised:2020-10-20 Online:2020-12-25 Published:2021-01-04

摘要:

兰州石化460 kt/a乙烯装置自2016年大检修后开车运行期间,碳二加氢反应器一段催化剂活性下降明显。对装置这一检修周期运行数据进行统计分析,发现因飞温造成的催化剂表面结焦及大量绿油生成是造成碳二加氢催化剂活性下降的主要原因,对比上个周期增多的乙炔、MAPD含量及进料中较多碳四组分和潜在的重金属毒物也加速了催化剂的失活,结合实际情况提出运行优化建议。


关键词: 碳二前加氢 ,  , 催化剂 ,  , 失活 ,  , 优化运行

Abstract:

Since the 460 kt/a ethylene plant at PetroChina Lanzhou Petrochemical Company was started up after its overhaul in 2016, the activity of catalysts in the first stage of acetylene hydrogenation reactor has decreased significantly. Based on the statistical analysis of the operation data of the plant in this maintenance cycle, it was found that the coking on catalyst surface caused by temperature runaway and the formation of a large amount of green oil were the main reasons for the decrease in activity of acetylene hydrogenation catalyst. Compared with the previous cycle, the higher contents of acetylene and MAPD and the more C4 components and potential heavy metal in the feed also accelerated the deactivation of catalysts. According to the actual situations, some suggestions for optimizing the operation of the plant were put forward.

Key words: C2 , hydrogenation, catalyst, deactivation, optimal operation