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大型循环流化床锅炉与煤粉炉汞排放特性研究

高天 肖日宏 揣兴 熊卓 韦耿 李铁 杨凯 李果 赵永椿 张军营

高天, 肖日宏, 揣兴, 熊卓, 韦耿, 李铁, 杨凯, 李果, 赵永椿, 张军营. 大型循环流化床锅炉与煤粉炉汞排放特性研究[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2021075
引用本文: 高天, 肖日宏, 揣兴, 熊卓, 韦耿, 李铁, 杨凯, 李果, 赵永椿, 张军营. 大型循环流化床锅炉与煤粉炉汞排放特性研究[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2021075
GAO Tian, XIAO Ri-hong, CHUAI Xing, XIONG Zhuo, WEI Geng, LI Tie, YANG Kai, LI Guo, ZHAO Yong-chun, ZHANG Jun-ying. Study on Mercury Emission Characteristics of Circulating Fluidized Bed Boiler and Pulverized Coal Boiler[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2021075
Citation: GAO Tian, XIAO Ri-hong, CHUAI Xing, XIONG Zhuo, WEI Geng, LI Tie, YANG Kai, LI Guo, ZHAO Yong-chun, ZHANG Jun-ying. Study on Mercury Emission Characteristics of Circulating Fluidized Bed Boiler and Pulverized Coal Boiler[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2021075

大型循环流化床锅炉与煤粉炉汞排放特性研究

doi: 10.19906/j.cnki.JFCT.2021075
基金项目: 国家重点研发计划(2016YFB0600604),国家自然科学基金(42030807),湖北省重点研发计划项目(2020BCA076)资助
详细信息
    作者简介:

    高天:gaot_sky@163.com

    通讯作者:

    Tel:13419608698,E-mail:yczhao@hust.edu.cn

  • 中图分类号: X511

Study on Mercury Emission Characteristics of Circulating Fluidized Bed Boiler and Pulverized Coal Boiler

Funds: The project was supported by the National R&D Program Project of China(2016YFB0600604), the National Natural Science Fundation of China (42030807), the Key Research and Development Program of Hubei Province(2020BCA076)
  • 摘要: 选取600 MW循环流化床锅炉及1000 MW煤粉炉的电厂进行汞迁移转化及排放特性研究,采用EPA 30B法对烟气汞浓度进行采样,同时采集了入炉煤、飞灰、底渣、石灰石、工艺水、脱硫石膏、脱硫废水等固体液体样品进行对比分析。研究了两电厂现有污染物控制装置对汞的协同脱除作用,分析了汞的迁移转化规律。两电厂烟气经过污染物控制装置后,总汞脱除率均达到88%以上,最终排放烟气汞浓度远低于国家现行排放标准要求,在现有设备条件下即可实现汞的达标排放。
  • 图  1  CFB锅炉机组和取样位置示意图

    Figure  1  Schematic diagram of CFB boiler unit and sampling location

    图  2  PC锅炉机组和取样位置示意图

    Figure  2  Schematic diagram of PC boiler unit and sampling location

    图  3  CFB电厂各采样点烟气汞浓度分布

    Figure  3  Distribution of mercury concentration in flue gas at each sampling point of CFB power plant

    图  4  PC电厂各采样点烟气汞浓度分布

    Figure  4  Distribution of mercury concentration in flue gas at each sampling point of PC power plant

    图  5  SCR进口出口烟气汞含量

    Figure  5  Mercury content in flue gas at SCR inlet and outlet

    图  6  ESP进口出口烟气汞含量

    Figure  6  Mercury content in flue gas at ESP inlet and outlet

    图  7  WFGD进口出口烟气汞含量

    Figure  7  Mercury content in flue gas at WFGD inlet and outlet

    图  8  APCDs进口出口烟气汞含量

    Figure  8  Mercury content in flue gas at APCDs inlet and outlet

    表  1  CFB及PC电厂煤样煤质分析

    Table  1  Coal quality analysis of coal samples in CFB and PC power plants

    Coal sampleProximate analysis/%Ultimate analysis /%Mercury content(ng·g−1
    MAVFCCHONS
    CFB8.9115.0725.3550.6768.064.2225.820.940.96117.40
    PC11.1117.7130.5740.6168.874.7124.201.270.95158.66
    下载: 导出CSV

    表  2  CFB及PC电厂固体液体样汞浓度

    Table  2  Mercury concentration of solid and liquid samples in CFB and PC power plants

    Coal sampleCoal (μg·kg−1)Bottom ash (μg·kg−1)Fly ash (μg·kg−1)Limestone (μg·kg−1)Gypsum (μg·kg−1)Water (μg·l−1)Waste water (μg·l−1)
    CFB117.4 ± 5.670.58 ± 0.04455 ± 5.7415.28 ± 0.280
    PC158.66 ± 3.4827.08 ± 0.85211.70 ± 2.640429.47 ± 8.4100
    下载: 导出CSV

    表  3  CFB电厂汞平衡计算

    Table  3  Calculation of mercury balance in CFB power plant

    SamplesMercury input/Mercury output(mg·h−1Proportion(%)
    Mercury inputCoal22118.1698.24%
    Limestone396.671.76%
    Water00.00%
    Total22514.83100.00%
    Mercury outputTail gas2742.3511.64%
    Fly ash20802.6088.31%
    Bottom ash10.940.05%
    Total23555.89100.00%
    Mercury mass balance rate104.62%
    下载: 导出CSV

    表  4  PC电厂汞平衡计算

    Table  4  Calculation of mercury balance in PC power plant

    SamplesMercury input/Mercury output(mg·h−1Proportion(%)
    Mercury inputCoal37205.77100.00%
    Limestone00.00%
    Water00.00%
    Total37205.77100.00%
    Mercury outputTail gas1906.344.95%
    Fly ash29786.1977.31%
    Gypsum4294.7011.15%
    Waste water00.00%
    Bottom ash2540.106.59%
    Total38527.34100.00%
    Mercury mass balance rate103.55%
    下载: 导出CSV

    表  5  CFB电厂各采样点烟气汞浓度

    Table  5  Mercury concentration in flue gas at each sampling point of CFB power plant

    Furnace outletESP outletWFGD outlet
    Hg0(μg·m−32.95 ± 0.320.43 ± 0.120.82 ± 0.22
    Hg2+(μg·m−31.97 ± 0.223.43 ± 0.671.03 ± 0.25
    HgP(μg·m−310.56 ± 1.03
    HgT(μg·m−315.48 ± 1.573.86 ± 0.791.85 ± 0.47
    下载: 导出CSV

    表  6  PC电厂各采样点烟气汞浓度

    Table  6  Mercury concentration in flue gas at each sampling point of PC power plant

    Furnace outletSCR outletESP outletWFGD outlet
    Hg0(μg·m−33.90 ± 0.430.61 ± 0.130.62 ± 0.130.47 ± 0.09
    Hg2+(μg·m−30.23 ± 0.090.53 ± 0.110.57 ± 0.120.63 ± 0.13
    HgP(μg·m−35.35 ± 0.5710.57 ± 1.09
    HgT(μg·m−39.48 ± 1.0911.71 ± 1.331.19 ± 0.251.10 ± 0.22
    下载: 导出CSV
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  • 收稿日期:  2021-07-08
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