| 空分短期停车时间阈值对氧气生产调度的影响 |
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| 引用本文： | 张培昆,王立.空分短期停车时间阈值对氧气生产调度的影响[J].化工学报,2017,68(6):2423-2433. |
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| 作者姓名： | 张培昆 王立 |
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| 作者单位： | 1. 北京科技大学能源与环境工程学院, 北京 100083;
2. 北京市高等学校节能与环保工程研究中心, 北京 100083 |
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| 基金项目： | 国家自然科学基金项目（51306015）；高等学校博士学科点专项科研基金项目（20130006120015） |
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| 摘 要： | 针对钢铁企业高炉休风场景下的氧气生产调度问题，提出以空分短期计划性停车为主要手段的调度策略，并基于MILP方法建立了氧气系统的优化调度模型。调度模型的优化目标为整个规划周期内氧气高压管网的综合压力最小化。模型包含了空分和部分氧气压缩机短期停车再启动操作的约束条件，并结合实际情况考虑了前述设备的停车时间阈值和运行时间阈值。以国内某大型钢铁企业为实际案例，验证了调度模型的合理性与可行性，然后基于模型计算分析了空分停车时间阈值对调度目标的影响规律。分析结果表明，减小空分停车时间阈值有利于获得更优的调度目标，但空分停车时间阈值对优化目标的影响规律具有阶跃特性，而非简单的比例关系。
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| 关 键 词： | 钢铁冶金 分离 数学模型 氧气生产 优化 MILP |
| 收稿时间： | 2016-11-30 |
| 修稿时间： | 2017-02-27 |
Effects of temporary shutdown time-threshold on oxygen production schedule in air separation unit |
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| ZHANG Peikun,WANG Li.Effects of temporary shutdown time-threshold on oxygen production schedule in air separation unit[J].Journal of Chemical Industry and Engineering(China),2017,68(6):2423-2433. |
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| Authors: | ZHANG Peikun WANG Li |
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| Affiliation: | 1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Engineering Research Center for Energy Saving and Environmental Protection, Beijing 100083, China |
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| Abstract: | Aimed at oxygen scheduling challenge under the scenario of blast furnace blow-down in integrated iron steel enterprises, a control strategy based on short-term shutdown of air separation units (ASUs) was proposed with an establishment of optimal scheduling model for oxygen distribution system by the mixed integer linear program. The objective of model optimization was to minimize overall oxygen pressure across high pressure oxygen piping network during entire scheduled cycle. The model included constraints for temporary shutdown and restart of ASUs and some oxygen compressors, as well as stop and run time thresholds of these equipment in real situations. A case study of a mega integrated iron and steel enterprise in China was performed to examine rationality and feasibility of the proposed model and to analyze effects of shutdown time threshold of ASUs on scheduling target by the model. The results show that a shorter shutdown time-threshold of ASU is generally propitious to achieve more optimal objective, which relationship between time-threshold and scheduling objective has non-linear leaping characteristic. |
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| Keywords: | iron and steel making separation mathematical modeling oxygen production optimization mixed integer linear program |
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