Dynamic simulation and control of differential pressure thermally coupled distillation in separation of propylene-propane mixture
ZHAO Jian-zhang1,2, DENG Jian-jun1
1. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China; 2. Department of Chemical and Environmental Engineering, Xinjiang Institute of Engineering, Urumqi 830091, China
Abstract: Taking the propylene distillation in gas fractionation facility of refinery as example,a steady-state simulation of differential pressure thermally coupled distillation is built up by using Aspen Plus.Based on the steady-state simulation,the dynamic characteristics of the RR-BR control and D-B control schemes are studied by using Aspen Dynamics,and are compared with conventional distillation.It is found that the dynamic performances resisting the disturbances of the feed flow rate and composition do not get weak with addition of the thermally coupled system.The control quality by RR-BR control scheme is better than that by D-B control scheme.The heat transfer load and area of the main heat exchanger are the key factors for differential pressure thermally coupled distillation.
赵建章, 邓建军. 丙烯差压热耦合精馏塔动态模拟与控制[J]. 现代化工, 2018, 38(3): 223-228.
ZHAO Jian-zhang, DENG Jian-jun. Dynamic simulation and control of differential pressure thermally coupled distillation in separation of propylene-propane mixture. Modern Chemical Industry, 2018, 38(3): 223-228.
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