Energy Recovery in a Naphtha Splitter Process through Debottlenecking of Retrofitted Thermally Coupled and Double-Effect Distillation Sequences

Title
Energy Recovery in a Naphtha Splitter Process through Debottlenecking of Retrofitted Thermally Coupled and Double-Effect Distillation Sequences
Author(s)
이문용레민쿠앙구웬롱
Keywords
DIVIDING-WALL COLUMNS; PURIFICATION PROCESS; DESIGN; OPTIMIZATION; SYSTEMS; EFFICIENCY; CAPACITY; SCHEMES
Issue Date
201506
Publisher
WILEY-V C H VERLAG GMBH
Citation
ENERGY TECHNOLOGY, v.3, no.6, pp.579 - 586
Abstract
A thermally coupled distillation sequence (TCDS) and a double-effect sequence (DES) were proposed to retrofit an existing naphtha splitter process in the refinery plant for enhanced energy efficiency. This, however, can create a bottleneck in the columns. A side reboiler was proposed to debottleneck the retrofitted columns. The concept of minimum vapor flow rate was used as a preliminary calculation to determine the benefits of these proposed arrangements. A practical optimization using the response surface methodology was applied to the design of TCDS and DES. In addition, a column grand composite curve was used to highlight the thermodynamic feasibility of the implementation of a side reboiler into the retrofitted sequences. As a result, the DES was shown as the best alternative through combination of a side reboiler, and this achieved 32.7% savings on operating costs with a maximum reuse of the existing equipment.
URI
http://hdl.handle.net/YU.REPOSITORY/32145http://dx.doi.org/10.1002/ente.201402158
ISSN
2194-4288
Appears in Collections:
공과대학 > 화학공학부 > Articles
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