乙烯工业 ›› 2018, Vol. 30 ›› Issue (4): 19-23.

• 工业技术 • 上一篇    下一篇

环氧乙烷再吸收系统吸收水量的优化

朱少坤   

  1. 中韩(武汉)石油化工有限公司,湖北 武汉 430082
  • 收稿日期:2018-08-04 接受日期:2018-10-30 出版日期:2018-12-25 发布日期:2018-12-30
  • 作者简介:朱少坤,男,2010年毕业于武汉工程大学化学工程专业,硕士研究生,现从事环氧芳烃技术管理工作,工程师。

Optimization of the Amount of Absorption Water in Ethylene Oxide Reabsorption System

Zhu Shaokun   

  1. SINOPEC-SK (Wuhan) Petrochemical Company Limited,Wuhan,Hubei,P.C.430082
  • Received:2018-08-04 Accepted:2018-10-30 Online:2018-12-25 Published:2018-12-30

摘要: 为满足环氧乙烷再吸收系统、环氧乙烷精制系统和乙二醇反应系统对再吸收塔吸收水量的不同要求,在保证环氧乙烷(EO)吸收前提下,以满足最优化环氧乙烷精制塔的进料EO浓度为根本出发点,调整脱醛物料稀释水量来满足乙二醇反应器(R-520)进料EO浓度要求。通过ASPEN模拟分析,依据工艺包数据和环氧乙烷精制塔内件设计数据,并结合环氧乙烷/乙二醇装置实际运行情况,将再吸收塔吸收水量从设计值381.4t/h降低至333.7(工况1)/295.7(工况2)t/h,环氧乙烷精制塔进料中的环氧乙烷浓度(质量分数)由8.9%提高至10%(工况1)/11.18%(工况2),实现在不增加环氧乙烷精制塔进料负荷的条件下每年可多产环氧乙烷(按8 000 h计算)27(工况1)/56(工况2)kt。

关键词: 环氧乙烷/乙二醇装置, 环氧乙烷精制, 吸收水量, 再吸收系统, 模拟优化

Abstract: In order to meet the different water demands of ethylene oxide (EO) reabsorption system, EO purification system and ethylene glycol (EG) reaction system for the EO reabsorption tower, the amount of dilution water from de-aldehyde line is adjusted to meet the EO concentration requirements of the feed to EG reactor (R-520) on the premise of guaranteeing the absorption of EO, with the aim of meeting the optimum EO concentration of the feed to EO purification tower. ASPEN simulation analysis shows that, based on the patented technology data and the design data of the internals of EO purification tower, and combined with the actual operation data of the EO/EG plant, the EO concentration of the feed to EO purification tower is increased from 8.9% to 10% (case 1)/11.18% (case 2) by reducing the amount of absorption water in the reabsorption tower from design value 381.4 t/h to 333.7 t/h (case 1)/295.7 t/h (case 2), achieving an additional EO production of 27 kt/a (case 1)/56 kt/a (case 2), calculated according to 8,000 hours, without increasing the feed load of EO purification tower.

Key words: EO/EG plant, EO purification, amount of absorption water, reabsorption system, simulation optimization