{"title":"Reduction of Energy Consumption of Distillation Process by Recovering the Heat from Exit Streams","authors":"Apichit Svang-Ariyaskul, Thanapat Chaireongsirikul, Pawit Tangviroon ","volume":89,"journal":"International Journal of Chemical and Molecular Engineering","pagesStart":397,"pagesEnd":400,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9998140","abstract":"
Distillation consumes enormous quantity of energy. This work proposed a process to recover the energy from exit streams during the distillation process of three consecutive columns. There are several novel techniques to recover the heat with the distillation system; however, a complex control system is required. This work proposed a simpler technique by exchanging the heat between streams without interrupting the internal distillation process that might cause a serious control problem. The proposed process is executed by using heat exchanger network with pinch analysis to maximize the process heat recovery. The test model is the distillation of butane, pentane, hexane, and heptanes, which is a common mixture in the petroleum refinery. This proposed process saved the energy consumption for hot and cold utilities of 29 and 27%, which is considered significant. Therefore, the recovery of heat from exit streams from distillation process is proved to be effective for energy saving.<\/p>\r\n","references":"[1]\tGadalla, M.A.; Olujic, Z.; Jansens, P.J.; M. Jobson and R. Smith, \"Reducing CO2 emissions and energy consumption of heat-integrated distillation system,\u201d Environmental Scice & Techology, vol. 39, 2005, pp. 6860-6870\r\n[2]\tRizk, J.; M. Nemer and D. Clodic, \"A real column design exergy optimization of a cryogenic air separation unit,\u201d Energy, vol. 37, 2011, pp. 417 \u2013 429\r\n[3]\tMah, R.S.H.; J.J. Nicholas Jr. and R.B. Wodnik, \" Distillation with secondary reflux and vaporization: a comparative evaluation,\u201d AIChE Journal, vol. 23, 1977, pp. 651 \u2013 658.\r\n[4]\tNakaiwa, M.; Huang, K.; Endo, A.; Ohmori, T.; T. Akiya and T. Takamatsu, \"Internally heat-integrated distillation columns, a review,\u201d Chemical Engineering Research & Design, vol. 84, 2003, pp. 374 \u2013 380.\r\n[5]\tSchmal, J.P.; van der Kool, H.J.; de Rijke, A.; Z. Olujic and P.J. Jansens, \"Internal versus external heat integration: operational and economical analysis,\u201d Chemical Engineering Research & Design, vol. 84, 2006, pp. 374-380.\r\n[6]\tHuang, K.; Lui, W.; J. Ma and S. Wang, \"Externally heat-integrated double distillation column (EDIDDiC): basic concept and general characteristics,\u201d Industrial Engineering & Chemistry Research, vol. 49, 2010, pp. 1333-1350.\r\n[7]\tWang, Y.; K. Huang and S. Wang, \"A simplified scheme of externally heat-integrated double distillation columns (EHIDDiC) with three external heat exchangers, Industrial Engineering & Chemistry Research, vol. 49, 2010, pp. 3349 \u2013 3364.\r\n[8]\tKim, Y.H., \"Internally heat-integrated distillation system for quaternary separation,\u201d Chemical Engineering Research & Design, vol. 89, 2011, pp. 2495-2500.\r\n","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 89, 2014"}