Sinosteel Wuhan Safety & Environmental Protection Research Institute Co.

炼铁工序是钢铁行业CO2排放量最大的主体工序,高炉煤气单位热值含碳量(简称CC)的取值,对于炼铁工序CO2排放量核算影响大。GB/T32151.5-2015附录B给出的高炉煤气CC推荐值(70.8×10-3t/GJ)为全碳组分CC,并非燃烧过程CC。基于某钢厂高炉煤气低位热值及主要组分含量实测数据,计算得出不同组分含量下高炉煤气CC实测值,分析不同组分含量高炉煤气低位发热量实测值、全碳组分CC实测值、燃烧过程CC实测值等实测参数变化。结合排放因子法广泛应用的现状,基于CC实测值波动情况,提出Ⅰ、Ⅱ、Ⅲ等3种将CC推荐值修正为燃烧过程CC的方法,在各自适用条件修正值与实测值的偏差均小于5%;最后,用该钢厂高炉炼铁工序2021年有关统计数据,针对高炉煤气CC推荐值修正前后高炉本体碳排放计算结果进行对比分析,修正前高炉本体每吨铁的碳排放量-0.19t,修正后高炉本体每t铁的碳排放量0.415t,修正结果与真实碳排放情况较吻合。

The ironmaking process is the main process with the largest CO emissions in the iron and steel industry, and the value of carbon content per unit calorific value (C) of blast furnace gas has an important impact on the accounting of CO emissions in the ironmak t/ GJ) given in Appendix B of GB/ T 32151.5-2015 is the toing process. The recommended C value of blast furnace gas (70.8 ×10tal carbon component C, not the combustion process C. Based on the measured data of the low-level calorific value and main component content of blast furnace gas in a steel mill, the measured C values of blast furnace gas under different component contents were calculated, and the changes of the measured parameters such as the measured low-level calorific value of blast furnace gas, the measuredvalue of the whole carbon component C, and the measured C value of the combustion process were analyzed. Combined with the currentsituation of the widespread application of the emission factor method, based on the fluctuation of the measured value of C, three methodsfor correcting the recommended value of C to C in the combustion process were proposed, such as I., II., III., etc. The deviation between the corrected value and the measured value is less than 5% under their respective applicable conditions. Finally, using the relevantstatistical data of the blast furnace ironmaking process of the steel mill in 2021, the calculation results of the carbon emissions of the blastfurnace body before and after the correction of the C recommended value of blast furnace gas were compared and analyzed, and the carbonemissions of the blast furnace body before the correction were -0.19 tons of CO for every tons of iron, and the carbon emissions of theblast furnace body after the correction were 0.415 tons of CO for every tons of iron , which was consistent with the real carbon emissions.

国家科技部NQI专项资助项目(2021YFF0601001)

万迎峰,李秋军,潘书婷,等.基于实测数据的高炉煤气单位热值含碳量推荐值的修正方法[J].洁净煤技术,2024,30(8):75-81.

WAN Yingfeng,LI Qiujun,PAN Shuting,et al.Correction method of the recommended value of carbon content per unit calorific value of blast furnace gas based on measured data[J].Clean Coal Technology,2024,30(8):75-81.