2010~2015年我国水泥工业NOx排放清单及排放特征

基于我国2011~2015年水泥企业逐条生产线基础信息、活动水平及控制技术等数据，建立了水泥工业NO_x排放量计算方法和动态排放数据库.利用该方法，计算了2011~2015年逐条水泥生产线NO_x排放量，分析了2010~2015年我国水泥工业NO_x排放特征.结果表明，我国水泥工业NO_x排放量变化范围为168~199万t，自2010年的169万t增加到2012年的199万t，达到排放峰值，随后逐年下降，到2015年与2010年基本持平.水泥工业NO_x排放的地区分布不均衡，2015年安徽、四川、河南、湖南、云南、山东是排放量最大的省份，占全国排放总量的40%，上海、内蒙、山西、新疆、湖南、云南、四川是单位熟料NO_x排放强度最大的省份.从生产线规模来看，规模≥ 4000 t·d^-1的熟料生产线产量占比和NO_x排放量占比均最大，分别为68.5%和66.5%，单位熟料NO_x平均排放强度最低.水泥生产工艺结构的转变及水泥工业降氮脱硝工作的开展是影响水泥工业大气NO_x排放特征的主要因素.

Emissions Inventory and Characteristics of NOx from Cement Industry

Activity data and technical information of cement production lines in China from 2011 to 2015 were collected. A NO_x emissions calculating model and emissions database were developed for the cement industry, and the NO_x emissions characteristics of cement production lines in China from 2011 to 2015 were analyzed. The results showed that NO_x emissions increased from 1.69 million tons in 2010 to 1.99 million tons in 2012, and then decreased in the subsequent three years to 1.68 million tons in 2015. The provincial-level emissions are significantly uneven. Anhui, Sichuan, Henan, Hunan, Yunnan, and Shandong provinces rank among the top six contributors in the country and together accounted for about 40% of the national emissions in 2015. Shanghai, Inner Mongolia, Shanxi, Xinjiang, Hunan, Yunnan, and Sichuan were the top seven by emissions factor. Lines with capacity of more than 4000 t·d^-1 contributed the largest part of NO_x emissions. The average NO_x emissions factor of more than 4000 t·d^-1 lines was 1.24 kg·t^-1. The rapid spread of pre-calcining kilns in China and a higher pollution abatement level were the main factors leading to variations in NO_x pollution characteristics in China.