Journal
ENERGY
Volume 118, Issue -, Pages 1131-1145Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2016.10.128
Keywords
Absorption-stabilization; Process retrofit; Energy-use efficiency; Two-stage condensation; Heat integration
Categories
Funding
- National Natural Science Foundation of China [21276288, U1462113]
- Guangdong Provincial Natural Science Foundation of China [2015A030313112]
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In a refining complex, an absorption-stabilization process used in the production of end-use petro-products (i.e. stable gasoline and liquefied petroleum gas) is energy-intensive and costly. A new absorption-stabilization process with a two-stage condensation section is introduced in this work to further improve energy-use performance. In the new process, a condenser, a condensed oil tank, and a side-reboiler are integrated into the original process and then a heat integration scheme is performed. Compared with the existing process, the proposed process can reduce the cold utility and hot utility by 17.98% and 25.65%, respectively, as well as decrease the total annual operating costs of the heat exchanger network by 17.48%. Additionally, the process retrofit reduces the annual operating costs of cooling water and steam by about $346,617 at the expense of capital costs around $487,006, and the corresponding payback period is approximately 17 months. (C) 2016 Elsevier Ltd. All rights reserved.
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