摘要
为准确估算混凝土搅拌站扬尘排放清单,本研究综合美国环保局和南加州的搅拌站扬尘排放因子,并在北京市典型搅拌站开展道路积尘负荷测试,建立了北京市搅拌站各生产环节及综合扬尘排放因子.结合北京市搅拌站扬尘治理过程,估算北京市1991~2014年搅拌站扬尘排放清单,并预测2015~2020年排放清单.结果表明:北京市2015年搅拌站道路积尘负荷平均值为(26.2±11.5)g/m^2,是南加州推荐值(11.0g/m2)的2.4倍;(2)1995年以前北京市搅拌站PM_(2.5)综合排放因子为86g/m^3混凝土,第1季度混凝土产量月不均匀系数是其他季度的1/3,2015年PM_(2.5)综合排放因子相比1995年以前下降89.4%,场区道路扬尘排放占比由10%增加至70%;(3)《北京市2013~2017年清洁空气行动计划》实施后,2015年搅拌站扬尘PM_(2.5)排放量下降至543.1t/a,相比2013年减排48.3%,其中清退无资质搅拌站对PM_(2.5)减排的贡献为18.6%;(4)搅拌站扬尘排放主要集中在五环至六环(52%),六环外排放量占总量的28%.未来北京市搅拌站扬尘减排工作应该着力于继续清退无资质搅拌和加强场区道路清扫保洁.
In order to estimate the emission inventory for fugitive dust from concrete batching plants accurately, emission factors for fugitive dust from concrete batching plants in USEPA and SCAQMD were synthesized in this paper, and road silt loading were carried out in typical concrete batching plants in Beijing, emission factors for fugitive dust of production segments and comprehensive process from concrete batching plants were established in Beijing. Combining with fugitive dust managing process from concrete batching plants in Beijing, fugitive dust emission inventory from concrete batching plants in Beijing from 1991 to 2014 was estimated, and predicted for the year of 2015 to 2020. Results showed that the mean value of road silt loading of concrete batching plants is（26.2±11.5）g/m^2 in Beijing in 2015, which is 2.4 times as much as the value（11.0g/m^2） recommended by SCAQMD. Fugitive dust from concrete batching plants in Beijing before 1995 was uncontrolled, the comprehensive emission factor of PM（2.5） was 86g/m^3 concrete, the uneven factor of monthly of production output of concrete batching plants in first quarter was 1/3 of other quarters. The comprehensive emission factor of PM（2.5） in 2015 was declined 89.4% compared with 1995, and proportion of plant fugitive road dust emission from plants in total emission was increased from 10% to 70%. After implementation of ＂Beijing＇s Clean Air Action Plan from2013-2017＂, PM（2.5） emission from concrete batching plants was fell to 543.1t/a and decreased by 48.3% in 2015 compared with 2013. The contribution of elimination of unqualified concrete batching plants to PM（2.5） emission reduction was 18.6%. Fugitive dust emission from concrete batching plants in Beijing concentrates on the fifth ring road to sixth ring road（52%）, the emission amount of outside of sixth ring road account for 28% of total amount. In the future, eliminating unqualified concrete batching plants continuously and strengthening road sweep cleaning in plants should be the most important emission reduction efforts of concrete batching plants in Beijing.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2017年第10期3699-3707,共9页
China Environmental Science
基金
国家质量基础的共性技术研究与应用重点专项(2017YFF0211804)
国家科技支撑计划课题(2014BAC23B02)
关键词
混凝土搅拌站
扬尘
排放因子
排放清单
concrete batching plant
fugitive dust
emission factor
emission inventory
