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针对钢铁厂物质流和能量流对能耗同时产生影响的问题,建立了能耗瓶颈诊断模型.模型分别用钢比系数和工序能耗衡量物质流和能量流,其功能是将吨钢综合能耗的变化分解为钢比系数的变化和工序能耗的变化,从而将两种因素的影响相分离,寻找能耗瓶颈.模型分析通过三步进行,分别针对总流程、区域和工序,形成了系统的分析体系.同时,提出了贡献指数的概念,以定量地描述各个因素对吨钢综合能耗的影响大小.利用该模型对某钢厂2001年和2007年的能耗指标进行实例分析,找出了相应的能耗瓶颈为炼铁区域和轧钢区域钢比系数的增加与炼钢区域工序能耗的上升,并提出了增加热送热装比、降低加热炉燃料消耗等节能对策.
Aiming at the problem that the material flow and the energy flow affect the energy consumption at the same time, the energy consumption bottleneck diagnosis model is established.The model uses the steel ratio coefficient and the process energy consumption respectively to measure the material flow and the energy flow, The change of consumption is decomposed into the change of steel specific coefficient and the change of process energy consumption, so as to separate the influence of the two factors and find the bottleneck of energy consumption. The model analysis is carried out in three steps, respectively for the total flow, the area and the process System analysis system.At the same time, the concept of contribution index is proposed to quantitatively describe the impact of various factors on the comprehensive energy consumption per ton of steel.Through the case analysis of energy consumption indicators of a steel mill in 2001 and 2007, The corresponding bottleneck of energy consumption is found to be the increase of steel ratio and the increase of energy consumption in the process of steel-making in the iron-making area and the steel-rolling area. Energy-saving measures such as increasing the heat-transfer ratio and reducing the fuel consumption in the heating furnace are proposed.