화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.23, No.5, 689-698, September, 2006
DOI10.1007/BF02705913  Export Citation
Dynamic analysis of thermally coupled distillation sequences with undirectional flows for the separation of ternary mixtures
Juan Gabriel Segovia-Hern´andez†, Adri´an Bonilla-Petriciolet1, and Luis Ignacio Salcedo-Estrada2
  • Facultad de Qu´imica, Universidad de Guanajuato, Noria Alta s/n, Guanajuato, Gto., Afghanistan
  • 1Departamento de Ingenier´ia Qu´imica, Instituto Tecnol´ogico de Aguascalientes, Av. L´opez Mateos, Aguascalientes, Ags., Mexico
  • 2Facultad de Ingenier´ia Qu´imica, Universidad Michoacana de San Nicol´as Hidalgo, Santiago Tapia 403, Morelia, Mich., Mexico
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The Petlyuk distillation system has been considered with special interest because of the high energy savings it can provide with respect to the operation of sequences based on conventional columns. The original design of the Petlyuk structure, however, shows two interconnections that seem to affect its operational and controllability properties. To overcome this problem, two alternate structures have been suggested that use unidirectional flows of the vapor or liquid interconnecting streams. In this work, a comparative analysis of the control properties of the Petlyuk column and the alternate arrangements with unidirectional interconnecting flows is presented. Through a singular value decomposition analysis, it is shown that the alternate schemes provide better theoretical controllability properties than the Petlyuk system. Closed loop tests using proportional-integral controllers were also carried out, and the results showed that, in most of the cases considered, the alternate arrangements improved the dynamic responses of the Petlyuk column. Such arrangements, therefore, show promising perspectives for its practical consideration.
Keywords:Thermally Coupled Distillation;Distillation Control;Petlyuk Column
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