燃煤电厂排放PAHs的气粒分配机制和排放通量

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Abstract 16US EPA priority PAHs at the inlet and outlet of fabric filter in a circulating fluidized bed boiler of CFPPs were analyzed. The partitioning mechanism of PAHs in the gas- and particle-phases with different particle sizes was studied. The results showed that the removal rates of gas phase and particulate PAHs by the fabric filter were 45.6% and 70.7%~89.1%, respectively. The gas phase mainly contained low molecular weight PAHs, while medium and high molecular weight PAHs were predominant in particle phases. The fractions of low molecular weight PAHs showed a declining trend with the decrease of particle size. The gas-particle partitioning of PAHs was primarily controlled by organic carbon absorption, and it had an apparent dependence on particle sizes. Most of PAHs species in the particles of different particle sizes in flue gas exhibited bi-model structures, with one mode peaking in the accumulation size range (1.1~2.1μm) and another peaking in the coarse size range (4.7~5.8μm). The emission factor of PAHs was 3.55mg/kg of coal burned, with 0.55mg/kg in gas phase and 3.0mg/kg in particle phase, respectively. Emissions of PAHs increased gradually from 29000kg in 2010 to 34200kg in 2014, then remained constant from 2014 to 2016, and finally significantly increased to 35900kg in 2017.

Key words： coal-fired power plants circulating fluidized bed boiler PAHs phase partitioning emission amount

Received: 29 May 2020

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X51

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	Articles by authors
	NI Xiu-feng
	WANG Ru-wei
	WANG Ji-zhong
	HUANG Qing
	CAI Fei-xuan

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NI Xiu-feng,WANG Ru-wei,WANG Ji-zhong等. Studies on the gas-particle partitioning mechanism of polycyclic aromatic hydrocarbons (PAHs) and emission amount from coal-fired power plants[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(1): 49-55.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I1/49

[1]	Lyons S L, Karp A T, Kliti Grice T J B, et al. Organic matter from the Chicxulub crater exacerbated the K-Pg impact winter[J]. Proceedings of the National Academy of Sciences, 2020,117(41):25327-25334.
[2]	Kalisa E, Nagato E G, Bizuru E, et al. Characterization and risk assessment of atmospheric PM2.5 and PM10 particulate-bound PAHs and NPAHs in Rwanda, Central-East Africa[J]. Environmental Science & Technology, 2018,52(21):12179-12187.
[3]	Hindersmann B, Achten C. Urban soils impacted by tailings from coal mining:PAH source identification by 59PAHs, BPCA and alkylated PAHs[J]. Environmental Pollution, 2018,242:1217-1225.
[4]	国家统计局能源统计司.中国能源统计年鉴2018[M]. 北京:中国统计出版社, 2018. Department of Energy Statistics, National Bureau of Statistics, People's Republic of China. China energy statistical yearbook 2018[M]. Beijing:China Statistical Press, 2018.
[5]	王占祥,郭久久,穆熙,等.宁东基地大气PAHs污染特征及呼吸暴露风险[J]. 中国环境科学, 2019,39(7):3102-3112. Wang Z X, Guo J J, Mu X, et al. Pollution characteristics and inhalation exposure risk of atmospheric PAHs in Ningdong Base[J]. China Environmental Science, 2019,39(7):3102-3112.
[6]	鲁垠涛,王雪雯,张士超,等.黄河全流域岸边表层土壤中PAHs的分布、来源及风险评估[J]. 中国环境科学, 2019,39(5):2078-2085. Lu Y T, Wang X W, Zhang S C, et al. Distribution, source and risk assessment of PAHs in surface soil of the Yellow River Basin[J]. China Environmental Science, 2019,39(5):2078-2085.
[7]	Guerriero E, Lutri A, Mabilia R, et al. Polycyclic aromatic hydrocarbon emission profiles and removal efficiency by electrostatic precipitator and wetfine scrubber in an iron ore sintering plant[J]. Journal of the Air Waste Management Association, 2008,58(11):14011406.
[8]	Li J, Li X, Li M, et al. Influence of air pollution control devices on the polycyclic aromatic hydrocarbon distribution in flue gas from an ultralow-emission coal-fired power plant[J]. Energy & Fuels, 2016, 30(11):9572-9579.
[9]	Yang H H, Lai S O, Hsieh L T, et al. Profiles of PAH emission from steel and iron industries[J]. Chemosphere, 2002,48(10):1061-1074.
[10]	Wang R W, Zhang J M, Liu J J, et al. Levels and patterns of polycyclic aromatic hydrocarbons in coal-fired power plant bottom ash and fly ash from Huainan, China[J]. Archives of Environment Contamination and Toxicology, 2013,65:193-202.
[11]	Hsu W T, Liu M C, Hung P C, et al. PAH emissions from coal combustion and waste incineration[J]. Journal of Hazardous Materials, 2016,318:32-40.
[12]	Wang R W, Liu G J, Zhang J M, et al. Variations of emission characterization of PAHs emitted from different utility boilers of coal-fired power plants and risk assessment related to atmospheric PAHs[J]. Science of the Total Environment, 2015,538:180-190.
[13]	Wang R W, Liu G J, Sun R Y, et al. Emission characteristics for gaseousand size-segregated particulate PAHs in coal combustion flue gas from circulating fluidized bed (CFB) boiler[J]. Environmental Pollution, 2018,238:581-589.
[14]	Mu L, Peng L, Liu X F, et al. Emission characteristics and size distribution of polycyclic aromatic hydrocarbons from coke production in China[J]. Atmospheric Research, 2017,197:113-120.
[15]	Lu C M, Dat N D, Lien C K L, et al. Characteristics of fine particulate matter and polycyclic aromatic hydrocarbons emitted from coal combustion processes[J]. Energy & Fuels, 2019,33:10247-10254.
[16]	Li X D, Zhou C Y, Li J W, et al. Distribution and emission characteristics of filterable and condensable particulate matter before and after a low-low temperature electrostatic precipitator[J]. Environmental Science and Pollution Research, 2019,26:1279812806.
[17]	Zhao Z F, Dong H M, Guo X. Size distributions, microstructures, and elemental compositions of PM2.5 from two coal-fired fluidized bed boilers equipped with fabric filters[J]. Energy & Fuels, 2020,34(4):4899-4908.
[18]	Wang C, Liu X, Li D, et al. Measurement of particulate matter and trace elements from a coal-fired power plant with electrostatic precipitators equipped the low temperature economizer[J]. Proceedings of the Combustion Institute, 2015,35(3):2793-2800.
[19]	Liu X W, Xu Y S, Fan B, et al. Field measurements on the emission and removal of PM2.5from coal-fired power stations:2. studies on two 135MW circulating fluidized bed boilers respectively equipped with an electrostatic precipitator and a hybrid electrostatic filter precipitator[J]. Energy & Fuels, 2016,30(9):5922-5929.
[20]	Xu Y S, Liu X W, Cui J, et al. Field measurements on the emission and removal of PM2.5from coal-fired power stations:4. PM removal performance of wet electrostatic precipitators[J]. Energy & Fuels, 2016,30(9):7465-7473.
[21]	Goss K, USchwarzenbach R P. Gas/soild and gas/liquid partitioning of organic compounds:critical evaluation of the interpretation of equilibrium constants[J]. Environmental Science & Technology, 1998, 32(14):2025-2032.
[22]	Kong S F, Ji Y Q, Li Z Y, et al. Emission and profile characteristic of polycyclic aromatic hydrocarbons in PM2.5 and PM10 from stationary sources based on dilution sampling[J]. Atmospheric Environment, 2013,77:155-165.
[23]	Kong S F, Shi J W, Lu B, et al. Characterization of PAHs within PM10fraction for ashes from coke production, iron smelt, heating station and power plant stacks in Liaoning Province, China[J]. Atmospheric Environment, 2011,45(23):3777-3785.