化工进展 ›› 2017, Vol. 36 ›› Issue (11): 4301-4307.DOI: 10.16085/j.issn.1000-6613.2017-0237

• 应用技术 • 上一篇    下一篇

钢铁企业蒸汽动力系统优化

高金彤, 倪团结, 张琦   

  1. 东北大学国家环境保护生态工业重点实验室, 辽宁 沈阳 110819
  • 收稿日期:2017-02-15 修回日期:2017-07-25 出版日期:2017-11-05 发布日期:2017-11-05
  • 通讯作者: 张琦,博士,副教授,研究方向为系统节能。
  • 作者简介:高金彤(1994-),男,硕士研究生。
  • 基金资助:
    国家重点研究开发计划项目(2016YFB0601301,2016YFB0601305)。

Optimization for steam power system in iron and steel works

GAO Jintong, NI Tuanjie, ZHANG Qi   

  1. State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, Liaoning, China
  • Received:2017-02-15 Revised:2017-07-25 Online:2017-11-05 Published:2017-11-05

摘要: 随着能源短缺与环境污染问题日益紧迫,钢铁企业所面临的节能减排压力也越来越大,合理的生产方案对降低企业运行成本、减少污染物排放起着重要的作用。本文针对钢铁企业蒸汽动力系统,采用锅炉效率非线性拟合公式和汽轮机分解模型,考虑能源设备、生产操作以及分时电价等因素,建立了混合整数非线性规划(MINLP)模型,其中,非线性锅炉效率拟合公式的引入使得模型更加符合实际生产状况。模型以蒸汽动力系统运行成本为目标函数,通过优化求解得到各时段燃料和设备负荷的分配方案,与优化前相比,系统总的运行费用减少了4.26%。同时,本文还分析了煤价变化对优化方案的影响以及燃料结构对污染物排放的影响,为企业提高生产效率、降低运行成本及节能减排提供理论依据。

关键词: 蒸汽动力系统, 分时电价, 环境, 优化, 系统工程

Abstract: With the issue of energy shortage and environmental pollution becoming more and more urgent,the iron and steel works face increasingly higher pressure of energy saving and emission reduction. A reasonable production plan plays an important role in cost saving and emission reduction. Aiming at the steam power system in iron and steel works,this paper has established a mixed-integer nonlinear programming(MINLP)model that uses fitting formulas of boilers and decomposed model of turbines,considering energy equipments,process operation and time-of-use power price. The application of the nonlinear boiler fitting formulas makes the model more consistent with the actual situation. With the minimization of operating cost,the optimal dispatch scheme of fuels and load at each period were obtained. The total cost has reduced by 4.26 percent compared to the non-optimum one. Two case studies were presented to demonstrate the feasibility of the proposed model. The influence of coal price and fuels was analyzed and the result has proved that this paper is constructive on efficiency improvement,energy conservation and emission reduction.

Key words: steam power system, time-of-use power price, environment, optimization, systems engineering

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