Journal
CHINESE JOURNAL OF CHEMICAL ENGINEERING
Volume 28, Issue 5, Pages 1277-1284Publisher
CHEMICAL INDUSTRY PRESS CO LTD
DOI: 10.1016/j.cjche.2019.12.020
Keywords
Energy saving; Sour water stripping; Thermal pump; Conceptual design; Coal gasification wastewater
Categories
Funding
- National Key R&D Program of China [2017YFB0602804]
- National Natural Science Foundation of China [21878164]
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Sour water contains ammonia, carbon dioxide, and hydrogen sulfides, producing from oil refining, coking, and coal gasification. To reduce the energy consumption in sour water stripping, a novel process is proposed which integrates with the bottom flashing mechanical vapor recompression heat pump (MVRHP) for treating such wastewater. Here, Aspen Plus (TM) as a powerful set of chemical process simulation software is utilized to investigate the economy and feasibility of the novel process. Comparison of the results of two process simulations, it can be seen that it is possible to reduce the total annual cost by nearly 45% to adopt the novel process, despite the capital investment increase 45% more than the conventional process. Thus, the provided conceptual design will play a guiding role in the industrialization of the process. (C) 2020 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
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