乙烯工业 ›› 2023, Vol. 35 ›› Issue (2): 1-8.

• 综述 •    下一篇

乙烷逐步替代石脑油对分离系统的影响分析

赵百仁,王振维,盛在行,李广华   

  1. 中国石化工程建设有限公司,北京 100101
  • 收稿日期:2022-09-05 修回日期:2023-02-21 出版日期:2023-06-25 发布日期:2023-07-11
  • 作者简介:赵百仁,男,1991年毕业于清华大学化学工程专业,工学硕士,长期从事乙烯、MTO和PDH等化工装置的设计工作,获国家科技进步奖1项,省部级奖7项,正高级工程师。

Influence of Gradually Replacing Naphtha by Ethane on Separation System

Zhao Bairen, Wang Zhenwei, Sheng Zaihang, Li Guanghua   

  1. SINOPEC Engineering Incorporation, Beijing, P.C.100101
  • Received:2022-09-05 Revised:2023-02-21 Online:2023-06-25 Published:2023-07-11

摘要:

在全石脑油原料的乙烯装置上,保持乙烯产量不变,逐步用乙烷替代石脑油。通过分离系统的全流程模拟研究发现,急冷区、压缩区和热区负荷都是降低的,冷箱的氢气和循环乙烷流道、乙烯精馏塔的提馏段首先出现瓶颈,压缩机出现瓶颈的次序是低压甲烷压缩机、甲烷制冷机和乙烯制冷机。替代石脑油不超过10%,通过调整操作基本可以实现;不超过20%,通过局部改造可以实现。

关键词: 乙烷  , 替代石脑油  , 分离  , 瓶颈

Abstract:

In an ethylene plant which only takes naphtha as the cracking feedstock, naphtha was gradually replaced by ethane while maintaining the ethylene output unchanged. Through the whole process simulation of separation system, it was found that the loads in quench area, compression zone and hot zone decreased, and bottlenecks first appeared in the passes of hydrogen and circulating ethane in cold box and the stripping section in ethylene rectifier. For compressors, bottlenecks successively appeared in low pressure methane compressor, methane refrigerator and ethylene refrigerator. Replacing no higher than 10% of the naphtha can be achieved by optimizing the operation, and replacing no higher than 20% of the naphtha can be achieved via partial modification..

Key words: ethane, naphtha replacement, separation, bottleneck