Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 56, Issue 8, Pages 2140-2149Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.6b03999
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Funding
- National Natural Science Foundation of China (NSFC) [51306015]
- Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) [20130006120015]
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Optimal shut-down policy for air separation units (ASUs) in the oxygen distribution system is studied for the integrated steel enterprises with a captive oxygen plant during a blast furnace blow-down. A multiperiod mixed-integer linear programming (MILP) model was proposed, which includes the minimum time constraints for ASU shut-down and start-up and the zero vent constraint of gaseous oxygen. When the decision variables are scheduled simultaneously, such as the on/off states of the fixed-load compressors and ASUs, the rate of the variable-load compressors, and the rate of liquefaction units, the model can easily offer the on-site manager a solution to operate the facilities in the oxygen distribution system while avoiding oxygen venting and minimizing the pressure levels of the high-pressure network in the buffer system, thereby reducing the overall energy consumption for oxygen production. The applicability of the model was demonstrated and justified using a real-world case study.
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