胺法脱碳系统流程改进及优化模拟

doi:10.3969/j.issn.0438-1157.2013.10.036

化工学报 ›› 2013, Vol. 64 ›› Issue (10): 3750-3759.DOI: 10.3969/j.issn.0438-1157.2013.10.036

胺法脱碳系统流程改进及优化模拟

李小飞, 王淑娟, 陈昌和

清华大学热能工程系, 热科学与动力工程教育部重点实验室, 二氧化碳资源化利用与减排技术北京市重点实验室, 北京 100084

收稿日期:2013-02-27 修回日期:2013-05-07 出版日期:2013-10-05 发布日期:2013-10-05
通讯作者: 王淑娟
作者简介:李小飞(1984-),男,博士研究生。

Modification of process and optimization for CO₂ capture systems using amine solution

LI Xiaofei, WANG Shujuan, CHEN Changhe

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Key Laboratory for CO₂ Utilization and Reduction Technology, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Received:2013-02-27 Revised:2013-05-07 Online:2013-10-05 Published:2013-10-05

摘要/Abstract

摘要： 采用一乙醇胺(MEA)进行燃煤电厂烟气脱碳是目前比较成熟和可行的技术,但是存在再生能耗高的严重缺陷。胺法脱碳系统流程改进及优化能有效降低再生能耗。应用Aspen Plus软件基于速率模型对传统胺法脱碳流程及其改进流程进行模拟研究。这些改进的流程包括吸收塔中间冷却流程、富液分流流程、贫液蒸汽再压缩流程、分流流程及富液分流与贫液蒸汽再压缩整合流程。研究结果表明:富液分流与贫液蒸汽再压缩整合流程节能效果最好,和传统流程相比再生能耗及等量功分别下降28.2%和11.9%。节能效果其次的是富液分流流程,再生能耗和等量功分别下降19.3%和11.8%。贫液蒸汽再压缩流程使再生能耗下降了14.1%,而等量功只下降了4.1%。吸收塔中间冷却流程和分流流程节能效果比较有限。

关键词: 一乙醇胺, 脱碳, 流程, 再生能耗

Abstract: Capturing CO₂ from coal-fired power plants using monoethanolamine(MEA)solution is a relatively mature and feasible technology at present.However,high energy requirement is its main drawback.The energy requirement can be reduced by modification of process and optimization.A rate-based model in Aspen Plus simulator is used to simulate the conventional flow path and its modification.The process modifications include absorber intercooling,rich split,lean vapor compression,split flow and the combination of rich split and lean vapor compression.The results show that combination of rich split and lean vapor compression as well as the rich split are the first and the second best process improvement,save of regeneration energy and decrease of equivalent work are 28.2% and 19.3% as well as 11.9% and 11.8%,respectively.For lean vapor compression,save of regeneration energy can be up to 14.1%,while the decrease of equivalent work is only 4.1%.The absorber intercooling and split flow is relatively limited for energy saving.

Key words: monoethanolamine, CO₂ capture, flow sheet, regeneration energy

中图分类号:

TK09

李小飞, 王淑娟, 陈昌和. 胺法脱碳系统流程改进及优化模拟[J]. 化工学报, 2013, 64(10): 3750-3759.

LI Xiaofei, WANG Shujuan, CHEN Changhe. Modification of process and optimization for CO₂ capture systems using amine solution[J]. CIESC Journal, 2013, 64(10): 3750-3759.

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胺法脱碳系统流程改进及优化模拟

Modification of process and optimization for CO₂ capture systems using amine solution

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胺法脱碳系统流程改进及优化模拟

Modification of process and optimization for CO2 capture systems using amine solution

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Modification of process and optimization for CO₂ capture systems using amine solution