无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2022, Vol. 54 ›› Issue (8): 96-100.doi: 10.19964/j.issn.1006-4990.2021-0763

• 工业技术 • 上一篇    下一篇

乙醇胺捕集燃煤烟气二氧化碳工艺模拟

张亚萍()   

  1. 山西铁道职业技术学院,山西 太原 030000
  • 收稿日期:2021-12-21 出版日期:2022-08-10 发布日期:2022-08-26
  • 作者简介:张亚萍(1986— ),女,硕士,讲师,研究方向为化工相关教学与研究;E-mail: yapzhang@163.com
  • 基金资助:
    山西省第二批现代学徒制试点-煤化工技术专业建设项目;山西省骨干专业-应用化工技术专业建设项目

Process simulation of carbon dioxide capture from coal-firing flue gas by ethanolamine

ZHANG Yaping()   

  1. Shanxi Railway Vocational and Technical College,Taiyuan 030000,China
  • Received:2021-12-21 Published:2022-08-10 Online:2022-08-26

摘要:

有机胺法是最有效的燃煤烟气二氧化碳(CO2)捕集技术之一。使用Aspen plus模拟乙醇胺(MEA)捕获烟气CO2的过程,先进行单独的吸收塔与再生塔模拟,在单独系统模型收敛的基础上,再进行吸收-解吸的综合模拟。在入塔烟气流量为8.22 m3/min、CO2物质的量分数为0.18、MEA流量为2 311.3 kg/h、MEA物质的量分数为0.12条件下,MEA捕集燃煤烟气中CO2的模拟结果: CO2脱除率为69.3%,净化气中CO2物质的量分数为5.33×10-2,再生塔顶再生气中CO2物质的量分数为0.956,基本达到了设计要求。此为更深入地开展胺法吸收CO2的研究提供了依据。

关键词: 乙醇胺, CO2, Aspen plus, 模拟, 燃煤烟气

Abstract:

The organic amine method is one of the most effective CO2 capturing techniques for coal-fired flue gas.Aspen plus was used to simulate the process of flue gas CO2 capture by ethanolamine(MEA).Firstly,separate absorption tower and regeneration tower were simulated,and then the comprehensive absorption-desorption simulation was carried out based on the convergence of the separate system model.The flue gas flow rate was 8.22 m3/min and the molar fraction of CO2 was 0.18,the flow rate of MEA was 2 311.3 kg/h and the molar fraction of MEA was 0.12.The simulation results of CO2 capture by MEA were as follows: the CO2 removal rate was 69.3%,the CO2 mole fraction in the purifing gas was 5.33×10-2,the CO2 mole fraction of regeneration tower top was 0.956,which basically met the design requirements,providing a basis for further research on CO2 absorption by amine method.

Key words: ethanolamine, CO2, Aspen plus, simulation, coal-firing flue gas

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