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摘要: 采集了2个超低排放燃煤电厂湿法脱硫入口和出口的PM2.5样品,分析了PM2.5、水溶性离子和多环芳烃(PAHs)的排放规律。结果显示:电厂A和B脱硫出口的PM2.5浓度分别为(2. 9±1. 2),(3. 4±2. 0) mg/m3,脱硫系统对PM2.5去除率分别为32. 6%和34. 6%;但PM2.5中水溶性离子浓度明显增加,主要离子组分为SO42-、Cl-和NH4+。厂区内大气环境的PM2.5浓度相比市区偏高34. 8%,建议对厂区内无组织源加强管理。脱硫出口的PAHs质量浓度分别为(494. 5±243. 9),(563. 2±310. 3) ng/m3,脱硫系统对PAHs的去除率分别为52. 7%和60. 4%,且对中高环(5~6环)的PAHs去除效果要明显优于低环(2~3环)。WFGD系统前后烟气中的PAHs主要以中低环(2~4环)的组分为主,高环物种含量较少。
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[1] Tong D,Zhang Q,Davis S.J,et al. Targeted emission reductions from global super-polluting power plant units[J]. Nature Sustainability,2018,1(1):59-68. [2] Tong D,Zhang Q,Liu F,et al. Current emissions and future mitigation pathways of coal-fired power plants in China from 2010to 2030[J]. Environmental Science&Technology,2018,52:12905-12914. [3] 洪沁,常宏宏.典型时段西南地区PM2. 5及组分污染特征[J].环境工程,2018,36(4):108-112. [4] 寿春晖,祁志福,谢尉扬,等.低低温电除尘器颗粒物脱除特性的工程应用试验研究[J].中国电机工程学报,2016,36(16):4326-4332. [5] Qi Z F,Li J W,Wu D L,et al. Particulate matter emission characteristics and removal efficiencies of a low-low temperature electrostatic precipitator[J]. Energy Fuel,2017,31(2):1741-1746. [6] 沈志刚,刘启贞,陶雷行,等.湿式电除尘器对烟气中颗粒物的去除特性[J].环境工程学报,2016,10(5):2557-2561. [7] 刘含笑,姚宇平,郦建国,等.燃煤电厂WESP颗粒物脱除机制及排放特征研究[J].中国电力,2017,50(12):178-184. [8] Zhang Y,Yang J P,Yu X H,et al. Migration and emission characteristics of Hg in coal-fired power plant of China with ultra low emission air pollution control devices[J]. Fuel Processing Technology,2017,158:272-280. [9] Wu B B,Tian H Z,Hao Y,et al. Effects of wet flue gas desulfurization and wet electrostatic precipitators on emission characteristics of particulate matter and its ionic compositions from four 300 MW level ultralow coal-fired power plants[J].Environmental Science&Technology,2018,52:14015-14026. [10] 陈浩,骆仲泱,江建平,等.电厂湿法烟气脱硫颗粒物排放特性的实验研究[J].动力工程学报,2017,37(11):925-937. [11] 王珲,宋蔷,姚强,等.电厂湿法脱硫系统对烟气中细颗粒物脱除作用的实验研究[J].中国电机工程学报,2008,28(5):1-7. [12] 潘丹萍,吴昊,鲍静静,等.电厂湿法脱硫系统对烟气中细颗粒物及SO3酸雾脱除作用研究[J].中国电机工程学报,2016,36(16):4356-4362. [13] 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 Fuel,2016,30(9):7465-7473. [14] Li Z,Jiang J K,Ma Z Z,et al. Influence of flue gas desulfurization(FGD)installations on emission characteristics of PM2. 5from coalfired power plants equipped with selective catalytic reduction(SCR)[J]. Environmental Pollution,2017,230:655-662. [15] 信晓颖,朱文韬,胡妲.湿法脱硫装置对多环芳烃排放特性的影响[J].华电技术,2018,40(8):74-80. [16] 赵承美,赵新富,孙俊民,等.燃煤电厂排放可吸入颗粒物中多环芳烃的分布特征[J].信阳师范学院学报(自然科学版),2008,21(2):203-205. [17] 李小龙,周道斌,段玖祥,等.超低排放下燃煤电厂颗粒物排放特征分析研究[J].中国环境监测,2018,34(3):45-50. [18] Liu F,Zhang Q,Tong D,et al. High-resolution inventory of technologies,activities,and emissions of coal-fired power plants in China from 1990 to 2010[J]. Atmospheric Chemistry and Physics,2015,15(13):18787-18837. [19] Meij R,Winkel B. The emissions and environmental impact of PM10and trace elements from a modern coal-fired power plant equipped with ESP and wet FGD[J]. Fuel Processing Technology,2004,85:641-656. [20] 李杏茹,白羽,陈曦,等.北京冬季重污染过程大气细颗粒物化学组成特征及来源分析[J].环境化学,2018,37(11):67-79. [21] 刘盈盈,殷宝辉,王静,等.济南冬季大气重污染过程颗粒物组分变化特征[J].环境化学,2018,37(12):2749-2757. [22] 黄凡,陈楠,周家斌,等. 2016—2017年武汉市城区大气PM2. 5污染特征及来源解析[J].中国环境监测,2019,35(1):17-25. [23] 田莎莎,张显,卞思思,等.沈阳市PM2. 5污染组分特征及其来源解析[J].中国环境科学,2019,39(2):487-496. [24] 郭振东,朱彬,王红磊,等.长江三角洲霾天气PM2. 5中水溶性离子特征及来源解析[J].中国环境科学,2019,39(3):928-938.
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