间壁式精馏塔在芳烃分离工艺中的研究与应用
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摘要
芳烃混合物由炼油厂的石脑油催化重整装置产生,芳烃分离物是重要的化工原料。传统工艺中,采用两塔序列从混合芳烃中依次分离出苯,甲苯,二甲苯和重组分等产品。本文以国内某石化企业实际芳烃分离工艺为研究对象,采用间壁式精馏塔工艺代替传统的两塔序列工艺,使用gPROMS模拟软件对新工艺过程进行建模和模拟计算。通过对间壁塔的回流比、气相分配比、液相分配比、塔顶产品量等参数的优化,在满足产品纯度要求下,得到了最优工艺操作条件。对两种工艺的分离效果的比较分析,表明间壁式精馏塔工艺比传统两塔序列工艺节能19.57%。
The aromatics mixture is yielded from petroleum catalytic refining in a petrochemical plant, as an important chemical raw material, the products are separated by binary distillation columns for benzene, toluene, xylene and heavy components in sequence in traditional process. In this paper, the actual aromatics separation process of a petrochemical plant is taken as an example to compare the capability of dividing wall column(DWC)with the convention distillation columns(CDC) process via simulation. Using the g PROMS to model and simulate the separation process in DWC. The optimum operating conditions are obtained under the requirement of product purity by optimizing the parameters such as the reflux ratio, the liquid split ratio, the vapor split ratio, the side-draw flowrates and the distillate flowrate. The results are shown that an energy saving of 19.57% is achieved by DWC over a CDC.
The aromatics mixture is yielded from petroleum catalytic refining in a petrochemical plant, as an important chemical raw material, the products are separated by binary distillation columns for benzene, toluene, xylene and heavy components in sequence in traditional process. In this paper, the actual aromatics separation process of a petrochemical plant is taken as an example to compare the capability of dividing wall column(DWC)with the convention distillation columns(CDC) process via simulation. Using the g PROMS to model and simulate the separation process in DWC. The optimum operating conditions are obtained under the requirement of product purity by optimizing the parameters such as the reflux ratio, the liquid split ratio, the vapor split ratio, the side-draw flowrates and the distillate flowrate. The results are shown that an energy saving of 19.57% is achieved by DWC over a CDC.
引文
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4 Schultz MA,Stewart DG,Harris JM.Reduce cost with diving wall columns[J].Chemical Engineering Process,2002,98(5):64-71.
5 朱哲熹,王健红,刘秦君等.三类典型间壁式精馏塔分离给定BTX物系的研究探索[J].计算机与应用化学,2016,33(9):1023-1026.
6 刘秦君,戚玉,张凤波等.基于改进?分析的间壁塔节能效果评价[J].计算机与应用化学,2015,32(11):1287-1290.CODEN JYYHE6/ISSN 1001-4160 DOI:10.16866/j.com.app.chem201709007Received:2017-03-29;Revised:2017-05-28;Published:2017-09-25
2 孔德金,杨为民.芳烃生产技术进展[J].化工进展,2011,30(1):
16 -25.3 Parkinson G.Dividing-wall columns find greater appeal[J].Chemical Engineering Process,2007,103(5):8-11.
4 Schultz MA,Stewart DG,Harris JM.Reduce cost with diving wall columns[J].Chemical Engineering Process,2002,98(5):64-71.
5 朱哲熹,王健红,刘秦君等.三类典型间壁式精馏塔分离给定BTX物系的研究探索[J].计算机与应用化学,2016,33(9):1023-1026.
6 刘秦君,戚玉,张凤波等.基于改进?分析的间壁塔节能效果评价[J].计算机与应用化学,2015,32(11):1287-1290.CODEN JYYHE6/ISSN 1001-4160 DOI:10.16866/j.com.app.chem201709007Received:2017-03-29;Revised:2017-05-28;Published:2017-09-25