化工进展 ›› 2023, Vol. 42 ›› Issue (S1): 518-528.DOI: 10.16085/j.issn.1000-6613.2023-0460

• 资源与环境化工 • 上一篇    下一篇

胺液吸收-分步解吸脱硫工艺的设计与评价

张凤岐1(), 崔成东1, 鲍学伟1, 朱炜玄1, 董宏光2()   

  1. 1.山东京博石油化工有限公司,山东 滨州 256500
    2.大连理工大学化工学院,辽宁 大连 116000
  • 收稿日期:2023-03-24 修回日期:2023-05-10 出版日期:2023-10-25 发布日期:2023-11-30
  • 通讯作者: 董宏光
  • 作者简介:张凤岐(1977—),男,硕士,高级工程师。E-mail:fengqi.zhang@chambroad.com
  • 基金资助:
    国家自然科学基金(21276039)

Design and evaluation of sweetening process with amine solution absorption and multiple desorption

ZHANG Fengqi1(), CUI Chengdong1, BAO Xuewei1, ZHU Weixuan1, DONG Hongguang2()   

  1. 1.Shandong Chambroad Petrochemicals Company Limited, Binzhou 256500, Shandong, China
    2.School of Chemical Engineering, Dalian University of Technology, Dalian 116000, Liaoning, China
  • Received:2023-03-24 Revised:2023-05-10 Online:2023-10-25 Published:2023-11-30
  • Contact: DONG Hongguang

摘要:

脱硫工艺作为炼厂必不可少的一部分,随着H2S下游加工技术的日益丰富,逐渐由杂质驱动型向资源驱动型转变,提高酸性气(解吸塔顶气)中H2S纯度,继而提高产品附加值,成为盈利的重要方向。基于此提出胺液吸收-分步解吸脱硫工艺,以此得到部分高纯度酸性气。采用速率级精馏方法进行模拟,通过系统工程方法论对工艺进行研究,提出逐级设计和塔压、进料温度作为主副调控手段的设计策略,并建立了基于设备购买曲线的经济评价框架进行工艺对比分析。结果表明,新工艺相比于传统工艺,年固定投资费用和年操作费用分别提高了30.86%和40.82%,但由于产品附加值的提高,利润提高了65.45%。随着解吸塔数量的增多,能耗上涨幅度会越来越大,经济效益反而下降。

关键词: 吸收, 速率级精馏, 模拟, 系统工程, 经济评价

Abstract:

As an essential part of refinery, sweetening process has gradually changed from impurity driven to resource driven with the enrichment of H2S processing technology. Through improving the purity of H2S in acid gas, the added value of products can be increased, which becomes an important direction to increase profit. Based on this, a sweetening process with amine solution absorption and multiple desorption was proposed to obtain part of high purity acid gas. The rate based distillation method was used to simulate the process, and the process was studied by system engineering methodology. A design strategy of hierarchical design and desorber pressure and feed temperature as main and secondary adjustment means was proposed. An economic evaluation framework based on equipment purchase curve was established for comparative analysis of process. The results showed that compared with the traditional process, the annual fixed investment cost and annual operating cost increased by 30.86% and 40.82%, respectively. The profit increased by 65.45% due to the increase of the added value of the product. In addition, with the increase of the number of desorbers, energy consumption will increase more and more, and the economic benefits will decrease.

Key words: absorption, rate based distillation, simulation, systems engineering, economic evaluation

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