我国钢铁工业一次颗粒物排放量估算

针对我国钢铁工业生产工艺以及颗粒物控制技术的分类,建立了一个细化到排放节点的自下而上的颗粒物排放模型.结合我国钢铁工业各地区活动水平以及颗粒物控制技术分布的历史变化趋势分析,利用此模型计算了2006—2012年我国钢铁工业一次颗粒物的排放系数和排放量.模型计算结果显示,2006年以来,我国钢铁工业颗粒物控制水平不断提高,PM_(2.5)、PM_(2.5)~10和PM10的排放系数分别降低了21.2%、19.3%和19.0%.钢铁工业一次颗粒物排放量在2006—2011年间持续增长,2011年TSP排放量为602×104t,PM10排放量为200×104t,PM_(2.5)排放量为124×104t;2012年排放量出现下降,TSP排放量为561×104t,PM10排放量为187×104t,PM_(2.5)排放量为116×104t.2012年我国钢铁工业一次PM_(2.5)排放量中的有组织排放占39.5%,无组织排放占60.5%;除加严有组织源管控之外,减少颗粒物无组织排放,对于钢铁工业颗粒物排放控制也非常重要.我国钢铁工业颗粒物排放量分布不均衡,河北、山东、江苏、辽宁、山西5个省的排放超过全国总排放的50%.

Estimation of primary particulate emissions from iron and steel industry in China

A bottom-up emission model for particulate matters (PM) was developed based on the emission sources and abatement technologies of iron and steel industry in China. By analyzing the historical distribution of different PM abatement technologies as well as the activity data in provincial level, emission factors (EF) and emission inventories of iron and steel industry for 2006-2012 were calculated. The results showed that EFs of PM_2.5, PM_2.5~10 and PM_>10 had decreased by 21.2%, 19.3% and 19.0% respectively during 2006-2012. Emissions of TSP from iron and steel industry in China increased from 2006 to 2011, with the peak value of 6.02×10⁶ t of TSP, 2.00×10⁶ t of PM₁₀ and 1.24×10⁶ t of PM_2.5 in 2011, and decreased in 2012, with the value of 5.61×10⁶ t of TSP, 1.87×10⁶ t of PM₁₀ and 1.16×10⁶ t of PM_2.5. Based on the estimation, fugitive emissions accounted for 60.5% of total primary PM_2.5 emissions of iron and steel industry in 2012. It indicates that apart from strengthening end of pipe emission control, reducing fugitive emissions is also crucial for iron and steel industry in China. The geographical distribution of PM emissions from iron and steel industry in China is quite uneven, with Hebei, Shandong, Jiangsu, Liaoning and Shanxi contributing more than 50% to the total emissions in China.