变压精馏分离甲醇和甲乙酮的模拟

doi:10.16039/j.cnki.cn22-1249.2019.09.001

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摘要

基于甲醇和甲乙酮二元共沸特性的分析，采用变压精馏方法分离甲醇和甲乙酮，以高压塔和常压塔再沸器总热负荷最低为目标，优化两塔理论板数、进料位置和回流比。得最佳工艺参数：高压塔操作压力300kPa、理论板数37、进料位置22、回流比2.5；常压塔操作压力101.3kPa、理论板数48、进料位置11、回流比4.25。得到甲乙酮和甲醇质量分数分别为99.75%和99.53%。在普通变压精馏基础上对系统进行完全热集成，相比于普通变压精馏，完全热集成变压精馏冷凝器热负荷降低48.07%，再沸器热负荷降低47.62%，实现了有效节能。

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	唐建可
	王琦

关键词: 甲醇甲乙酮变压精馏完全热集成节能

Abstract:

Pressure swing distillation for separation of methanol and methyl ethyl ketone was investigated based on thepressure-sensitivity of azeotropic composition. Taking the lowest total heat load of reboiler of the high pressure and atmospheric pressure towers as the optimization objective, the theoretical plate number, feed position and mass reflux ratio of the two towers were optimized. The optimum process parameters were obtained as follows: high pressure tower operating pressure 300kPa, theoretical plate number 37, feed position 22, reflux ratio 2.5; atmospheric tower operating pressure 101.3kPa, theoretical plate number 48, feed position 11, reflux ratio 4.25. The mass fractions of methanol and methyl ethyl ketone are 99.75% and 99.53%, respectively. On the basis of ordinary pressure swing distillation, the system is fully heat integrated. Compared with ordinary pressure swing distillation, the heat load of the condenser of fully heat-integrated pressure swing distillation reduces by 48.07% and the heat load of reboiler decreases by 47.62%, which realizes effective energy saving.

Key words: methanol methyl ethyl ketone pressure swing distillation fully heat-integrated energy saving

出版日期: 2019-09-25 发布日期: 2019-09-25 整期出版日期: 2019-09-25

ZTFLH:

TQ028

引用本文:

唐建可, 王琦. 变压精馏分离甲醇和甲乙酮的模拟 [J]. 吉林化工学院学报, 2019, 36(9): 1-5.
TANG Jianke, WANG Qi. Simulation of Separation of Methanol-methyl Ethyl Ketone by Pressure Swing Distillation . Journal of Jilin Institute of Chemical Technology, 2019, 36(9): 1-5.

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http://xuebao.jlict.edu.cn/CN/10.16039/j.cnki.cn22-1249.2019.09.001 或 http://xuebao.jlict.edu.cn/CN/Y2019/V36/I9/1

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