基于工业代谢分析的焦化生产能源系统优化研究

The Metabolism Analysis on Optimization of the Energy System in the Coking Industry

运用工业代谢分析方法,对某焦化企业生产过程进行能源代谢分析,追踪和分析能流走向,通过比较其所有的输入输出过程来筛选企业节能降耗的关键节点,并结合企业实际调查分析提出优化措施。结果表明,该企业焦化系统煤-焦转换效率较低,焦炉耗热量较大;能量回收率低,各种余热浪费比较严重。根据研究结果,从加强余热资源回收、提高能源效率提出了具体的能源系统优化建议,以期实现降低吨焦能耗,为同类企业开展节能降耗探索了研究路径。

With the analysis of the industrial metabolism,this paper analyzes the energy metabolism of the coke production process in a coking plant,traces and analyzes the energy’s fluxion,clarifies the inputs and outputs of these energy flows for the enterprise to indentify the main energy loss units.It indicates that the efficiency of the coal-coke transformation is low,the cookery exhausts too much heat,the recycling rate of energy is low,and the wasting of all kinds of afterheat is comparatively serious.For instance,the coke cooling process uses wet-coke-cooling method;the afterheat of the red coke doesn’t get efficient recycling.The crude gas is cooled down by ammonia water spray,which leads to the great wastage of the crude gas’s afterheat.On the basis of the analysis,the paper gives advice about the optimization of energy system,reduces the energy consumption of per ton coke obviously,and gives the direction of energy-saving in coking industry.