| 燃煤电厂煤粉炉及CFB锅炉PM2.5产生及排放特性的现场实验研究 |
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| 引用本文： | 赵志锋,杜谦,赵广播,高建民,董鹤鸣,曹阳,韩强,苏利鹏,苑鹏飞.燃煤电厂煤粉炉及CFB锅炉PM2.5产生及排放特性的现场实验研究[J].化工学报,2015,66(3):1163-1170. |
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| 作者姓名： | 赵志锋 杜谦 赵广播 高建民 董鹤鸣 曹阳 韩强 苏利鹏 苑鹏飞 |
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| 作者单位： | 1.哈尔滨工业大学能源科学与工程学院, 黑龙江 哈尔滨 150001;2.东北电力科学研究院有限公司, 辽宁 沈阳 110000;3.华电电力科学研究院, 浙江 杭州 310030 |
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| 基金项目： | 国家环保公益性行业科研经费专项项目(201009006)。@@@@supported by the Special Fund for Environmental Protection Research in Public Interest |
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| 摘 要： | 采用稀释采样方法对一台220 MW煤粉炉(锅炉A)及一台300 MW的CFB锅炉(锅炉B)电袋复合式除尘器前后PM2.5进行现场采样。通过ELPI测定PM2.5的粒径分布;采用SEM分析PM2.5的显微结构;采用EDX及ICP-OES分别对分级PM2.5中次量及痕量元素含量进行了检测。结果表明,锅炉A和B除尘前后对应的PM2.5粒数及质量浓度分布均不同;锅炉A和B产生的PM2.5分别以较为光滑球形和不规则形状为主,锅炉A除尘后PM2.5呈表面粗糙球形,锅炉B除尘后PM2.5单颗粒形貌特征不变;锅炉A和锅炉B产生的PM2.5除尘前后在各粒径段中Si、Al、Fe、Ca和Mg含量基本一致,As、Cd和Se含量随着粒径的减小而增大;除尘后锅炉A产生PM2.5中As和Se含量增加,且在亚微米PM2.5中As和Se含量的增加更明显,锅炉B除尘后PM2.5中As和Se含量基本不变。
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| 关 键 词： | PM2.5 煤粉炉 CFB 粒径分布 电袋复合式除尘器 显微结构 次量及痕量元素 |
| 收稿时间： | 2014-08-20 |
| 修稿时间： | 2014-11-19 |
Field experimental research on PM2.5 generation and emission characteristics of pulverized coal and CFB boilers in power plants |
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| ZHAO Zhifeng,DU Qian,ZHAO Guangbo,GAO Jianmin,DONG Heming,CAO Yang,HAN Qiang,SU Lipeng,YUAN Pengfei.Field experimental research on PM2.5 generation and emission characteristics of pulverized coal and CFB boilers in power plants[J].Journal of Chemical Industry and Engineering(China),2015,66(3):1163-1170. |
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| Authors: | ZHAO Zhifeng DU Qian ZHAO Guangbo GAO Jianmin DONG Heming CAO Yang HAN Qiang SU Lipeng YUAN Pengfei |
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| Affiliation: | 1.School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China;2.Northeast Electric Power Research Institute Co., Ltd., Shenyang 110000, Liaoning, China;3.Huadian Electric Power Research Institute, Hangzhou 310030, Zhejiang, China |
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| Abstract: | A dilution sampling method was used to collect PM2.5 before and after COHPACs (compact hybrid particulate collector) generated by a pulverized coal boiler (boiler A) and a circulating fluidized bed boiler (boiler B) with installed capacities of 220 MW and 300 MW, respectively. Particle size distributions (PSDs) of PM2.5 were analyzed by ELPI; individual microstructures of PM2.5 were analyzed by SEM (scanning electron microscopy); concentrations of minor elements in PM2.5 were analyzed by EDX (energy-dispersive X-ray analysis) and concentrations of trace elements in PM2.5 were analyzed by ICP-OES (inductively coupled plasma optical emission spectroscopy). The distribution characteristics of number and mass concentration of PM2.5 at the corresponding sampling positions of two boilers were different. Most of the PM2.5 before and after COHPAC-A (boiler A's) were spherical; most of the PM2.5 before and after COHPAC-B (boiler B's) were irregular in shape; the PM2.5 after COHPAC-A were with relatively uneven surface, PM2.5 microstructures before and after COHPAC-B were similar; mass fraction size distributions of Si, Al, Fe, Ca and Mg in PM2.5 before and after the two COHPACs were similar; mass fraction size distributions of As, Cd and Se in PM2.5 before and after the two COHPACs increased with decreasing size; mass fraction size distributions of As and Se in submicron PM2.5 after COHPAC-A were higher than those before COHPAC-A, but mass fraction size distributions of As and Se in PM2.5 before and after COHPAC-B were correspondingly nearly the same. |
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| Keywords: | PM2 5 pulverized coal boiler CFB particle size distribution COHPAC microstructure minor and trace elements |
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