本文主要研究内容
作者杨金垚（2019）在《基于Aspen的燃煤烟气低能耗二氧化碳捕集工艺的模拟研究》一文中研究指出：本文基于通用流程模拟软件Aspen Plus,结合热力学和动力学的实验数据,对现阶段最有希望实现燃煤烟气碳捕集工业化的化学吸收法和吸附法进行了工艺优化,通过模拟获得了新型低能耗脱碳方案。针对化学吸收,提出了可耦合传统捕集流程的戊烷吹扫再生工艺和戊烷回收系统,构建了H2O-Pentane/CO2/Amine气液体系,探究了三种常用吸收剂MEA、AMP、MDEA经戊烷汽提后的节能效果,结果显示新工艺的再生能耗相比直接蒸汽吹扫和传统再沸器热再生分别能降低15-25%和38-60%,且贫液有更低的温度和负荷。传热传质研究表明在戊烷吹扫中塔顶有更强烈的闪蒸现象,这是因为戊烷吹扫蒸发大量水蒸汽破坏气液边界层,促进CO2从液相向气相扩散,同时戊烷吹扫气被加热膨胀,导致塔内传质推动力更强。MDEA有更低的解吸热需求和在高负荷下更高的CO2平衡分压,因此在低温戊烷汽提中相比MEA、AMP具有更好的再生性能。通过敏感度分析探讨了影响系统的操作参数,结果显示富液的温度和负荷对再生影响较大,冷凝温度和压缩压力对戊烷回收影响较大。此外模拟了液液相变吸收工艺,解决了新型吸收剂物性缺乏的问题。模型基于Aspen气液平衡计算方程,总结嵌入DEEA及反应产物所需参数,选择与实际捕集相同温度、压力等条件下的实验数据进行了相应拟合,完成的热力学模型通过了实验验证,在DEEA/MEA物性包基础上建立了15万吨DMH相变工艺,模拟显示DMH在贫液负荷0.30和0.25 mol CO2/mol MEA时热耗、水耗最低,分别为2.69 GJ/t CO2和80.6 t H2O/t CO2,比传统吸收剂MEA（30wt%）系统优化后低31%、11%,其中水耗减少是由再生气冷却水耗大幅降低引起。针对吸附,建立了蒸汽吹扫再生的双床变温吸附工艺,研究了适合描述活性炭吸附的过程模型,模拟与实验穿透曲线对比表明理想溶液-线性阻力组合模型的结果最接近实际实验。新工艺分别使用高温蒸汽和吸附后烟气加热和冷却再生床,模拟显示提升吹扫温度能较大增加捕集率,能耗增加较少,但产品纯度提升很小,提升吸附/脱附时间能显著增加产品纯度,但降低捕集率和产生较多能耗。本文以低能耗为目标,对吸收和吸附捕集CO2工艺的模拟优化进行了系统探讨,所得结果对新工艺设计、物性包开发和流程工程实现等具有一定指导意义。
Abstract
ben wen ji yu tong yong liu cheng mo ni ruan jian Aspen Plus,jie ge re li xue he dong li xue de shi yan shu ju ,dui xian jie duan zui you xi wang shi xian ran mei yan qi tan bu ji gong ye hua de hua xue xi shou fa he xi fu fa jin hang le gong yi you hua ,tong guo mo ni huo de le xin xing di neng hao tuo tan fang an 。zhen dui hua xue xi shou ,di chu le ke ou ge chuan tong bu ji liu cheng de wu wan chui sao zai sheng gong yi he wu wan hui shou ji tong ,gou jian le H2O-Pentane/CO2/Amineqi ye ti ji ,tan jiu le san chong chang yong xi shou ji MEA、AMP、MDEAjing wu wan qi di hou de jie neng xiao guo ,jie guo xian shi xin gong yi de zai sheng neng hao xiang bi zhi jie zheng qi chui sao he chuan tong zai fei qi re zai sheng fen bie neng jiang di 15-25%he 38-60%,ju pin ye you geng di de wen du he fu he 。chuan re chuan zhi yan jiu biao ming zai wu wan chui sao zhong da ding you geng jiang lie de shan zheng xian xiang ,zhe shi yin wei wu wan chui sao zheng fa da liang shui zheng qi po huai qi ye bian jie ceng ,cu jin CO2cong ye xiang xiang qi xiang kuo san ,tong shi wu wan chui sao qi bei jia re peng zhang ,dao zhi da nei chuan zhi tui dong li geng jiang 。MDEAyou geng di de jie xi re xu qiu he zai gao fu he xia geng gao de CO2ping heng fen ya ,yin ci zai di wen wu wan qi di zhong xiang bi MEA、AMPju you geng hao de zai sheng xing neng 。tong guo min gan du fen xi tan tao le ying xiang ji tong de cao zuo can shu ,jie guo xian shi fu ye de wen du he fu he dui zai sheng ying xiang jiao da ,leng ning wen du he ya su ya li dui wu wan hui shou ying xiang jiao da 。ci wai mo ni le ye ye xiang bian xi shou gong yi ,jie jue le xin xing xi shou ji wu xing que fa de wen ti 。mo xing ji yu Aspenqi ye ping heng ji suan fang cheng ,zong jie qian ru DEEAji fan ying chan wu suo xu can shu ,shua ze yu shi ji bu ji xiang tong wen du 、ya li deng tiao jian xia de shi yan shu ju jin hang le xiang ying ni ge ,wan cheng de re li xue mo xing tong guo le shi yan yan zheng ,zai DEEA/MEAwu xing bao ji chu shang jian li le 15mo dun DMHxiang bian gong yi ,mo ni xian shi DMHzai pin ye fu he 0.30he 0.25 mol CO2/mol MEAshi re hao 、shui hao zui di ,fen bie wei 2.69 GJ/t CO2he 80.6 t H2O/t CO2,bi chuan tong xi shou ji MEA（30wt%）ji tong you hua hou di 31%、11%,ji zhong shui hao jian shao shi you zai sheng qi leng que shui hao da fu jiang di yin qi 。zhen dui xi fu ,jian li le zheng qi chui sao zai sheng de shuang chuang bian wen xi fu gong yi ,yan jiu le kuo ge miao shu huo xing tan xi fu de guo cheng mo xing ,mo ni yu shi yan chuan tou qu xian dui bi biao ming li xiang rong ye -xian xing zu li zu ge mo xing de jie guo zui jie jin shi ji shi yan 。xin gong yi fen bie shi yong gao wen zheng qi he xi fu hou yan qi jia re he leng que zai sheng chuang ,mo ni xian shi di sheng chui sao wen du neng jiao da zeng jia bu ji lv ,neng hao zeng jia jiao shao ,dan chan pin chun du di sheng hen xiao ,di sheng xi fu /tuo fu shi jian neng xian zhe zeng jia chan pin chun du ,dan jiang di bu ji lv he chan sheng jiao duo neng hao 。ben wen yi di neng hao wei mu biao ,dui xi shou he xi fu bu ji CO2gong yi de mo ni you hua jin hang le ji tong tan tao ,suo de jie guo dui xin gong yi she ji 、wu xing bao kai fa he liu cheng gong cheng shi xian deng ju you yi ding zhi dao yi yi 。
论文参考文献
论文详细介绍
论文作者分别是来自浙江大学的杨金垚，发表于刊物浙江大学2019-05-20论文，是一篇关于二氧化碳论文,化学吸收法论文,吸附论文,能耗论文,优化设计论文,浙江大学2019-05-20论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自浙江大学2019-05-20论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。