Izvorni znanstveni članak
Enhancing Thermodynamic Efficiency of Energy Intensive Distillation Columns via Internal Heat Integration
Ž. Olujić
; Delft University of Technology, Process & Energy Laboratory, Leeghwaterstraat 44, 2628 CA Delft, The Netherlands
L. Sun
; China University of Petroleum, School of Chemistry and Chemical Engineering, Dongying 257061, Shandong Province, China
M. Gadalla
; University Rovira i Virgili, Department of Chemical Engineering, Paisos Catalans 26, Campus Sescelades, 43007 Tarragona, Spain
A. de Rijke
; Delft University of Technology, Process & Energy Laboratory, Leeghwaterstraat 44, 2628 CA Delft, The Netherlands
P. J. Jansens
; Delft University of Technology, Process & Energy Laboratory, Leeghwaterstraat 44, 2628 CA Delft, The Netherlands
Sažetak
As demonstrated in the present simulation study, taking propylene/propane splitter as base case, an internally heat integrated distillation column (HIDiC), with rectification section
operating at higher pressure and temperature than the stripping section, offers significant potential for energy saving compared to energy requirements associated with operation of conventional and heat-pump assisted distillation columns. The rectification section
of a propylene/propane splitter contains usually two times more stages than the stripping section, implying a number of heat coupling possibilities, which appears to be strongly influencing the thermal efficiency of the HIDiC. The configuration with the stripping section
stages thermally interconnected with the same number of stages in the upper part of the rectification section emerged as the most efficient configuration, allowing a reduction in energy use in the range 30 to 40 % compared with a state of the art heat-pump assisted column, depending on the trade off between the operating compression ratio and the heat transfer area requirement, the latter one being the key limiting factor.
Ključne riječi
Distillation columns; energy saving; HIDiC; heat pump; vapour recompression
Hrčak ID:
30652
URI
Datum izdavanja:
23.12.2008.
Posjeta: 2.516 *