计及碳抵消-碳交易下钢铁产业余热集中供热的优化

Optimization and regulation of waste heat centralized heating in the steel industry under carbon offsetting and carbon trading

为控制能源消耗产生的碳排放,助力实现“碳达峰”“碳中和”目标,提出计及碳抵消-碳交易钢铁产业余热的优化调度。基于综合碳排放评价指标对迁西县2022-2023年余热采暖工程进行上游钢铁余热量与下游供热碳抵消量的平衡分析。研究结果表明:各工序的单位热量碳抵消量排序为高炉渣水>烧结烟气>吸收机>烧结缓冷蒸汽>12 MW汽水换热器>15 MW汽水换热器。近期方案中计及碳排放-碳抵消的钢铁余热利用优化方法在典型工程中回收247.5 MW余热量,可减排2.05万吨二氧化碳,能实现0.004 tCO_(2)/m_(2)的综合能源效益。结果证明,该方案对于提高能源利用效率、减少环境污染,实现建筑供暖的低碳转型具有重大意义。

To control carbon emissions generated by energy consumption and help achieve carbon peak and carbon neutrality goals,an optimized scheduling plan is proposed that takes into account carbon offsetting and carbon trading in the steel industry's waste heat.This article is based on the comprehensive carbon emission evaluation index to analyze the balance between upstream steel residual heat and downstream heating carbon offset of the waste heat heating project in Qianxi County from_(2)022 to 2023.The research results indicate that the comparison of carbon offset per unit heat of each process is as follows:blast furnace slag water>sintering flue gas>absorption machine>sintering slow cooling steam>12MW steam water heat exchanger>15MW steam water heat exchanger.The optimization method for steel waste heat utilization,which takes into account carbon emissions and carbon offsetting in recent plans,can recover 247.5MW of residual heat in typical projects,reduce 20500 tons of CO_(2),and achieve a comprehensive energy efficiency of 0.004tCO_(2)/m_(2).The results have proven that this plan is of great significance for improving energy utilization efficiency,reducing environmental pollution,and achieving low-carbon transformation of building heating.