钢铁流程资源-能源-碳排放耦合关系及分析

Analysis on coupling relationship of resource-energy-carbon emissions in steel production

钢铁工业作为国民经济建设的基础性行业,在繁荣发展的同时带来了资源和能源消耗量大、CO2排放高等问题,引起国内外重点关注。基于中国北方某钢铁企业,以3种典型的耦合关系为例对钢铁生产过程的水资源-能源-碳排放耦合关系以及相关的影响因素进行了分析。节能供给曲线分析和生命周期水足迹分析结果表明,案例企业的能源消耗-水资源消耗-碳排放存在协同效应。例如在节能技术视角下,19项具有成本效益的节能技术在减少能耗6.01GJ/t的同时,还可协同减少工业新水消耗1.35m^3/t、水足迹4.81m^3/t以及CO2排放640.36kg/t。进一步分析了耦合关系的主要影响因素,即电力消费结构、废钢投入率和节能技术参数变化的影响。该研究为中国钢铁工业可持续发展提供理论依据和重要参考。

As the basic industry of national economic construction,the steel industry has brought the problems of large consumption of resources and energy,high CO2 emission and so on,which has attracted the attention of domestic and foreign countries.Based on a certain iron and steel enterprise in northern China,this paper analyzes the coupling relationship of resources,energy and carbon emission in the iron and steel production process and the related influencing factors with three typical coupling relationships as examples.The result of energy saving supply curve analysis and life cycle water footprint analysis shows that there is a synergistic effect between energy consumption,water resource consumption and carbon emission of the case enterprise.For example,from the perspective of energy saving technology,19 cost-effective energy-saving technologies can reduce energy consumption by 6.01 GJ/t,at the same time,they can also reduce industrial fresh water consumption by 1.35 m^3/t,water footprint by 4.81 m^3/t and CO2 emission by 640.36 kg/t.Furthermore,the main influencing factors of the coupling relationship are analyzed,which are the power consumption structure,scrap input rate and the change of energy-saving technical parameters.This study provides theoretical basis and important reference for the sustainable development of China’s iron and steel industry.