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基于Aspen Plus醋酸乙烯精馏塔的模拟优化

Chemical Production and Technology(2011)

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Abstract
利用Aspen Plus软件,选择NRTL活度系数方程和Hayden-O′connell逸度系数方程的热力学模型,应用系统中的RadFrac精馏模块对醋酸乙烯精馏塔进行模拟,模拟值与实际值基本吻合。讨论了进料位置、回流比、塔顶侧线采出量等参数对精馏分离精度与能耗的影响,提出优化方案为:进料板为第62块,回流比为32,侧线采出质量流量为37.5 t/h。此参数下,重新进行计算,结果显示,塔顶冷凝器和塔釜再沸器的热流量分别降低了15.5%和16.9%,塔顶侧线采出液中醋酸乙烯和塔釜采出液中醋酸的质量分数分别上升了0.4%和0.13%。
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Key words
optimization,rectification tower,vinyl acetate,simulation,Aspen Plus
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