Graduate Thesis Or Dissertation
 

Development and dynamic analysis of an experimental heat integrated distillation column

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/d504rp97b

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  • Heat integrated distillation has been studied using an experimental column built for that purpose. Heat integration involves the use of intermediate reboilers and condensers to increase the thermal efficiency of distillation. The intermediate reboiler and condenser systems used in this work were designed so that the experimental column could be operated either as a conventional distillation column (without the intermediate heat exchangers) or as a heat integrated distillation column. Sufficient instrumentation was included in the experimental setup so that liquid temperatures on each tray in the column could be monitored. Pulse disturbances in four system parameters were used to generate dynamic responses for both conventional and heat integrated distillation using the methanol-water binary system. The disturbed parameters include the liquid feed flowrate, the bottom boilup rate, the external liquid reflux rate and the intermediate condensation rate. Based on comparisons of the dynamic responses for the two systems, it is concluded that heat integrated distillation in this case is more restrained in its response to disturbances. This restraint is attributed to a moderating effect provided by the intermediate heat exchangers. The experimental dynamic responses were compared with dynamic responses predicted by a theoretical model. This comparison indicates that the heat losses from the experimental column are substantial and must be reduced in further work on the experimental equipment.
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