Design and control of pressure-swing distillation for separating methyl acetate-methanol-ethyl acetate azeotropic system

doi:10.16085/j.issn.1000-6613.2021-2059

Abstract

Abstract:

The methyl acetate-methanol-ethyl acetate azeotropic mixtures can be produced in the production process of polypropylene alcohol, which must be treated immediately to avoid the environmental pollution and resource waste. In this paper, two pressure-swing distillation (PSD) separation sequences with different product orders were designed for the separation of methyl acetate-methanol-ethyl acetate mixture, which were economically optimized to obtain the optimal design parameters with the minimal total annual costs as target using genetic algorithm. The results showed that the equipment investment costs were 5.6×10⁵USD/a and 5.7×10⁵USD/a, and the energy costs were 8.8×10⁵USD/a and 1.0×10⁶USD/a for two PSD separation sequences, respectively. In addition, the control structures of the PSD scheme with economic advantages were constructed, so that the PSD process could remain stable and the purities of the three products after stabilization could still maintain near the initial set values in the face of feed flowrates and compositions disturbances.

Key words: pressure-swing distillation, dynamic simulation, optimal design, methyl acetate-methanol-ethyl acetate, azeotrope

摘要：

聚丙烯醇的生产过程会产生乙酸甲酯-甲醇-乙酸乙酯共沸混合物，如果不及时处理，必然会造成环境污染和资源浪费。本文采用变压精馏的方式，针对乙酸甲酯-甲醇-乙酸乙酯体系设计了两种产品顺序不同的变压精馏分离序列，并采用遗传算法以年度总费用最小为目标，对两种分离序列进行优化设计以获得最优的设计参数。优化结果表明，两种变压精馏分离方案的设备投资费用分别为5.6×10⁵USD/a和5.7×10⁵USD/a，能耗费用分别为8.8×10⁵USD/a和1.0×10⁶USD/a。此外，对具有经济优势的变压精馏分离方案进行了控制结构的构建，使该过程在面对进料流量扰动和进料组分扰动时仍能维持稳定，稳定之后的三种产品纯度仍能维持在设定值附近。

关键词: 变压精馏, 动态仿真, 优化设计, 乙酸甲酯-甲醇-乙酸乙酯, 共沸物

CLC Number:

TQ021.8

XIANG Sheng, WANG Chao, ZHUANG Yu, GU Siwen, ZHANG Lei, DU Jian. Design and control of pressure-swing distillation for separating methyl acetate-methanol-ethyl acetate azeotropic system[J]. Chemical Industry and Engineering Progress, 2022, 41(8): 4065-4076.

向晟, 王超, 庄钰, 顾偲雯, 张磊, 都健. 变压精馏分离乙酸甲酯-甲醇-乙酸乙酯体系的设计与控制[J]. 化工进展, 2022, 41(8): 4065-4076.

Figures/Tables 19

压力/bar	X_实验	X_预测1	ΔX₁/%	X_预测2	ΔX₂/%	X_预测3	ΔX₃/%
8.77	0.455^［24］	0.465	2.15	0.466	2.36	0.452	0.66
5.86	0.515^［24］	0.511	0.78	0.512	0.59	0.499	3.11
1.013	0.661^［25］	0.668	1.05	0.671	1.49	0.666	0.75
0.799	0.675^［25］	0.685	1.46	0.689	2.03	0.684	1.33
0.667	0.691^［25］	0.697	0.86	0.701	1.43	0.697	0.87
			Δ $\overset{ˉ}{X}$ ₁=1.26		Δ $\overset{ˉ}{X}$ ₂=1.58		Δ $\overset{ˉ}{X}$ ₃=1.34

压力/bar	X_实验	X_预测1	ΔX₁/%	X_预测2	ΔX₂/%	X_预测3	ΔX₃/%
8.77	0.455^［24］	0.465	2.15	0.466	2.36	0.452	0.66
5.86	0.515^［24］	0.511	0.78	0.512	0.59	0.499	3.11
1.013	0.661^［25］	0.668	1.05	0.671	1.49	0.666	0.75
0.799	0.675^［25］	0.685	1.46	0.689	2.03	0.684	1.33
0.667	0.691^［25］	0.697	0.86	0.701	1.43	0.697	0.87
			Δ $\overset{ˉ}{X}$ ₁=1.26		Δ $\overset{ˉ}{X}$ ₂=1.58		Δ $\overset{ˉ}{X}$ ₃=1.34

压力/bar	X_实验	X_预测1	ΔX₁/%	X_预测2	ΔX₂/%	X_预测3	ΔX₃/%
1.41	0.742^［26］	0.723	2.56	0.727	2.02	0.722	2.70
1.013	0.700^［27］	0.703	0.43	0.708	1.14	0.703	0.43
0.92	0.698^［27］	0.698	0	0.702	0.57	0.698	0
			Δ $\overset{ˉ}{X}$ ₁=1.00		Δ $\overset{ˉ}{X}$ ₂=1.24		Δ $\overset{ˉ}{X}$ ₃=1.04

压力/bar	X_实验	X_预测1	ΔX₁/%	X_预测2	ΔX₂/%	X_预测3	ΔX₃/%
1.41	0.742^［26］	0.723	2.56	0.727	2.02	0.722	2.70
1.013	0.700^［27］	0.703	0.43	0.708	1.14	0.703	0.43
0.92	0.698^［27］	0.698	0	0.702	0.57	0.698	0
			Δ $\overset{ˉ}{X}$ ₁=1.00		Δ $\overset{ˉ}{X}$ ₂=1.24		Δ $\overset{ˉ}{X}$ ₃=1.04

压力范围/bar	系数C的取值
0~3.4	3919.32
3.4~6.8	3966.20
6.8~13.6	4059.96
13.6~20.5	4106.85

蒸汽类型	压力/bar	温度/℃	价格/USD·kJ^-1
低压蒸汽	6	160	7.78×10^-6
中压蒸汽	11	184	8.22×10^-6
高压蒸汽	42	254	9.88×10^-6

References 36

1	任海伦, 安登超, 朱桃月, 等. 精馏技术研究进展与工业应用[J]. 化工进展, 2016, 35(6): 1606-1626.
	REN Hailun, AN Dengchao, ZHU Taoyue, et al. Distillation technology research progress and industrial application[J]. Chemical Industry and Engineering Progress, 2016, 35(6): 1606-1626.
2	GΌRAK A, SORENSEN E. Distillation: fundamentals and principles[M]. Amsdertam: Elsevier Inc., 2014: 307.
3	LUYBEN W L. Pressure-swing distillation for minimum- and maximum-boiling homogeneous azeotropes[J]. Industrial & Engineering Chemistry Research, 2012, 51(33): 10881-10886.
4	SOUKUP S T, AL-MAHARIK N, BOTTING N, et al. Quantification of soy isoflavones and their conjugative metabolites in plasma and urine: an automated and validated UHPLC-MS/MS method for use in large-scale studies[J]. Analytical and Bioanalytical Chemistry, 2014, 406(24): 6007-6020.
5	王崇晓, 朱龙平. 恒沸精馏分离乙腈-甲醇-水体系的研究[J]. 广东化工, 2015, 42(13): 3-4.
	WANG Chongxiao, ZHU Longping. Study on separation of acetonitrile-methanol-water system by azeotropic distillation[J]. Guangdong Chemical Industry, 2015, 42(13): 3-4.
6	CHANIAGO Y D, LEE M. Distillation design and optimization of quaternary azeotropic mixtures for waste solvent recovery[J]. Journal of Industrial and Engineering Chemistry, 2018, 67: 255-265.
7	姜斌, 吴菲, 隋红, 等. 甲醇-丙酮共沸物分离的研究进展[J]. 化工进展, 2010, 29(3): 397-402.
	JIANG Bin, WU Fei, SUI Hong, et al. Development in separation of acetone-methanol azeotrope[J]. Chemical Industry and Engineering Progress, 2010, 29(3): 397-402.
8	CAO Yujuan, LI Min, WANG Yong, et al. Effect of feed temperature on economics and controllability of pressure-swing distillation for separating binary azeotrope[J]. Chemical Engineering and Processing: Process Intensification, 2016, 110: 160-171.
9	杨金杯, 黄辉, 余美琼, 等. 萃取精馏与变压精馏分离甲醇/乙酸异丙酯工艺优化及节能[J]. 中南大学学报(自然科学版), 2020, 51(9): 2379-2388.
	YANG Jinbei, HUANG Hui, YU Meiqiong, et al. Optimization and energy-saving for methanol + isopropyl acetate separation by extractive distillation and pressure swing distillation[J]. Journal of Central South University (Science and Technology), 2020, 51(9): 2379-2388.
10	KNAPP J P, DOHERTY M F. A new pressure-swing-distillation process for separating homogeneous azeotropic mixtures[J]. Industrial & Engineering Chemistry Research, 1992, 31(1): 346-357.
11	ZHU Zhaoyou, XU Dongfang, LIU Xingzhen, et al. Separation of acetonitrile/methanol/benzene ternary azeotrope via triple column pressure-swing distillation[J]. Separation and Purification Technology, 2016, 169: 66-77.
12	ZHU Zhaoyou, XU Dongfang, WANG Yongkun, et al. Effect of multi-recycle streams on triple-column pressure-swing distillation optimization[J]. Chemical Engineering Research and Design, 2017, 127: 215-222.
13	ZHU Zhaoyou, XU Dongfang, JIA Hui, et al. Heat integration and control of a triple-column pressure-swing distillation process[J]. Industrial & Engineering Chemistry Research, 2017, 56(8): 2150-2167.
14	LUYBEN W L. Control of a triple-column pressure-swing distillation process[J]. Separation and Purification Technology, 2017, 174: 232-244.
15	ZHANG Qingjun, LIU Meiling, LI Wang, et al. Heat-integrated triple-column pressure-swing distillation process with multi-recycle streams for the separation of ternary azeotropic mixture of acetonitrile/methanol/benzene[J]. Separation and Purification Technology, 2019, 211: 40-53.
16	YANG Ao, SHEN Weifeng, WEI Shun’an, et al. Design and control of pressure-swing distillation for separating ternary systems with three binary minimum azeotropes[J]. AIChE Journal, 2019, 65(4): 1281-1293.
17	WANG Chao, GUANG Chao, CUI Yue, et al. Separation of a ternary mixture with multiple azeotropes via pressure-swing distillation[J]. Journal of Chemical Technology & Biotechnology, 2019, 94(6): 2023-2033.
18	WANG Chao, ZHANG Zhishan, ZHANG Xiaokang, et al. Comparison of pressure-swing distillation with or without crossing curved-boundary for separating a multiazeotropic ternary mixture[J]. Separation and Purification Technology, 2019, 220: 114-125.
19	黄旭, 罗祎青, 袁希钢. 带共沸的乙醇/乙酸乙酯/2-丁酮三元物系变压精馏分离过程及其参数优化[J]. 化工学报, 2018, 69(5): 2089-2099.
	HUANG Xu, LUO Yiqing, YUAN Xigang. Separation of C₂H₅OH/C₄H₈O₂-3/C₄H₈O-3 ternary mixture with azeotropes by pressure swing distillation and its parameter optimization[J]. CIESC Journal, 2018, 69(5): 2089-2099.
20	KAYMAK D B. Design and control of an alternative intensified process configuration for separation of butanol-butyl acetate-methyl isobutyl ketone system[J]. Chemical Engineering and Processing Process Intensification, 2021, 159: 108233.
21	CAO Jun, YU Guangren, CHEN Xiaochun, et al. Determination of vapor–liquid equilibrium of methyl acetate + methanol + 1-alkyl-3-methylimidazolium dialkylphosphates at 101.3kPa[J]. Journal of Chemical & Engineering Data, 2017, 62(2): 816-824.
22	NISHI Y. Vapor-liquid equilibrium for binary systems accompanied by hypothetical chemical reaction[J]. Nippon Kagaku Kaishi, 1973(8): 1592-1595.
23	ZHANG Zhigang, PAN Fenjin, ZHANG Qinqin, et al. Isobaric vapor–liquid equilibria for ethyl acetate + methanol + ionic liquids ternary systems at 101.3kPa[J]. Journal of Chemical & Engineering Data, 2016, 61(2): 772-779.
24	NAGAHAMA K, HIRATA M. Binary vapor-liquid equilibria at elevated pressures[J]. Journal of Chemical Engineering of Japan, 1971, 4(3): 205-210.
25	CHEN Genghua, WANG Qi, ZHANG Lianzhong, et al. Study and applications of binary and ternary azeotropes[J]. Thermochimica Acta, 1995, 253: 295-305.
26	BLANCO A M, ORTEGA J. Densities and vapor-liquid equilibrium values for binary mixtures composed of methanol + an ethyl ester at 141.3kPa with application of an extended correlation equation for isobaric VLE data[J]. Journal of Chemical & Engineering Data, 1998, 43(4): 638-645.
27	MURTI P, VAN WINKLE M. Vapor-liquid equilibria for binary systems of methanol, ethyl alcohol, 1-propanol, and 2-propanol with ethyl acetate and 1-propanol-water[J]. Industrial & Engineering Chemistry Chemical & Engineering Data Series, 1958, 3(1): 72-81.
28	OLUJIĆ Ž, SUN L, DE RIJKE A, et al. Conceptual design of an internally heat integrated propylene-propane splitter[J]. Energy, 2006, 31(15): 3083-3096.
29	WANG Chao, ZHUANG Yu, LIU Linlin, et al. Design and comparison of conventional and side-stream extractive distillation sequences for separating the methanol-toluene binary azeotrope with intermediate boiling entrainer[J]. Computers & Chemical Engineering, 2020, 143: 107115.
30	LUYBEN W L. Distillation Design and control using Aspen^TM simulation[M]. 2nd ed. Hoboken: John Wiley & Sons, 2013: 84 .
31	张伟静, 张雷. 隔壁塔萃取精馏分离丙酸甲酯-甲醇的模拟与优化[J]. 现代化工, 2021, 41(S1): 315-318.
	ZHANG Weijing, ZHANG Lei. Simulation and optimization of separation of methyl propionate-methanol by extractive distillation in dividing wall column[J]. Modern Chemical Industry, 2021, 41(S1): 315-318.
32	钱行, 黄克谨, 陈海胜, 等. 基于粒子群算法的隔离壁精馏塔的综合与设计[J]. 化工进展, 2021, 40(11): 5967-5972.
	QIAN Xing, HUANG Kejin, CHEN Haisheng, et al. Synthesis and design of dividing-wall distillation column based on particle swarm optimization[J]. Chemical Industry and Engineering Progress, 2021, 40(11): 5967-5972.
33	陆佳伟, 汤吉海, 张竹修, 等. Matlab与Aspen Plus软件交互实现和应用[J]. 计算机与应用化学, 2018, 35(1): 53-61.
	LU Jiawei, TANG Jihai, ZHANG Zhuxiu, et al. The realization and application of the integration between Matlab and Aspen Plus[J]. Computers and Applied Chemistry, 2018, 35(1): 53-61.
34	徐东芳, 胡佳静, 王丽丽, 等. 变压精馏分离乙醇-氯仿共沸物的动态特性[J]. 化工进展, 2016, 35(4): 1242-1249.
	XU Dongfang, HU Jiajing, WANG Lili, et al. Dynamic characteristics of pressure-swing distillation for ethanol-chloroform separation[J]. Chemical Industry and Engineering Progress, 2016, 35(4): 1242-1249.
35	徐东芳. 三塔变压精馏分离甲醇-乙腈-苯的过程综合与热集成[D]. 青岛: 青岛科技大学, 2017.
	XU Dongfang. Process synthesis and heat integration of triple column pressure-swing distillation for separating methanol/acetonitrile/benzene[D]. Qingdao: Qingdao University of Science & Technology, 2017.
36	孟庆信. 特殊精馏分离甲苯-乙醇共沸物系的优化与控制[D]. 青岛: 青岛科技大学, 2014.
	MENG Qingxin. Optimization and control of separation for toluene-ethanol azeotropic system with special distillation[D]. Qingdao: Qingdao University of Science & Technology, 2014.

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