引用本文:贺晋瑜,燕 丽,雷 宇,汪旭颖,等.我国燃煤电厂颗粒物排放特征[J].环境科学研究,2015,28(6):862-868.
HE Jinyu,YAN Li,LEI Yu,WANG Xuying,et al.Emission Characteristics of Particulate Matter from Coal-Fired Power Plants in China[J].Reserrch of Environmental Science,2015,28(6):862-868.]
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我国燃煤电厂颗粒物排放特征
贺晋瑜, 燕 丽, 雷 宇, 汪旭颖
环境保护部环境规划院, 北京 100012
摘要:
基于我国燃煤电厂(不含港、澳、台数据,下同)的燃烧技术及颗粒物控制技术分类,建立了燃煤电厂颗粒物排放计算方法. 利用该方法,分析了2000─2010年我国燃煤电厂颗粒物排放量及分布特征. 结果表明:我国燃煤电厂颗粒物排放量自2000年起持续增加,于2005年达到最高值(375×104 t),其中PM10、PM2.5排放量分别为237×104、129×104 t;此后逐年降低,2010年降至166×104 t,其中PM10、PM2.5排放量分别降至126×104、85×104 t. 随着静电除尘及湿法脱硫的普及,颗粒物中PM2.5所占比例由2005年的34.3%升至2010年的51.2%. 我国燃煤电厂颗粒物排放地区分布不均衡,2010年内蒙古、山东、河南、江苏、山西和广东六省区的排放量占全国排放总量的44%. PM2.5排放因子也因各省燃煤电厂颗粒物排放控制技术不同而产生差异,其中煤粉炉、循环流化床锅炉的PM2.5排放因子分别为0.35~0.75、0.27~0.90 kg/t. 从机组规模影响来看,单台容量在30×104 kW以下的燃煤机组是粗颗粒(PM>10)的主要来源,而在30×104 kW以上的燃煤机组对PM2.5排放贡献(64.6%)较大,这主要与这类燃煤机组静电除尘和湿法脱硫的安装比例高有关.
关键词:  颗粒物  燃煤电厂  排放量  分布特征  PM2.5排放因子
DOI:
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基金项目:国家环境保护公益性行业科研专项(201309072)
Emission Characteristics of Particulate Matter from Coal-Fired Power Plants in China
HE Jinyu, YAN Li, LEI Yu, WANG Xuying
Chinese Academy for Environmental Planning, Beijing 100012, China
Abstract:
Abstract: A particulate matter (PM) emission model was developed based on the combustion modes and pollution control devices in China's coal-fired power plants. The PM emissions from coal-fired power plants in China from 2000-2010 were calculated with the model. The results showed that PM emissions from coal-fired power plants peaked in 2005, with 375×104 t of TSP, 237×104 t of PM10 and 129×104 t of PM2.5, and then decreased year by year. In 2010, emissions of TSP, PM10 and PM2.5 dropped to 166×104,6×104 and 85×104 t, respectively. With increasing use of electrostatic precipitators and wet flue gas desulfurization technologies, the proportions of PM2.5 in total PM increased from 34.3% in 2005 to 51.2% in 2010. Coal-fired power plants should focus on fine particle emissions reduction in the future. In addition, the distribution of PM emissions among provinces is uneven:Inner Mongolia, Shandong, Henan, Jiangsu, Shanxi and Guangdong combine to contribute 44% of emissions of China. The situation of emission control among provinces is different. The PM2.5 emission factors were 0.35-0.75 kg/t for pulverized coal furnaces and 0.27-0.90 kg/t for circulating fluidized bed boilers. In terms of the impacts by unit capacity, units of less than 30×104 kW were the main source of PM>10, while those of 30×104 kW or more dominated PM2.5 emissions (64.6%) from coal-fired power plants, due to the larger coverage of electrostatic precipitator and wet flue gas desulfurization technologies in the coal-fired units above 30×104 kW than in those below 30×104 kW.
Key words:  particulate matter  coal-fired power plant  emissions  distribution  PM2.5 emission factor