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435M2烧结机机头化学团聚强化细颗粒物及重金属脱除试验研究

揣兴 崔向峥 雍恒 熊卓 赵永椿 张军营

揣兴, 崔向峥, 雍恒, 熊卓, 赵永椿, 张军营. 435M2烧结机机头化学团聚强化细颗粒物及重金属脱除试验研究[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2021079
引用本文: 揣兴, 崔向峥, 雍恒, 熊卓, 赵永椿, 张军营. 435M2烧结机机头化学团聚强化细颗粒物及重金属脱除试验研究[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2021079
CHUAI Xing, CUI Xiang-zheng, YONG Heng, XIONG Zhuo, ZHAO Yong-chun, ZHANG Jun-ying. Experimental Research on removal of fine particles and heavy metals by chemical agglomeration from the flue gas of 435M2 sintering machine[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2021079
Citation: CHUAI Xing, CUI Xiang-zheng, YONG Heng, XIONG Zhuo, ZHAO Yong-chun, ZHANG Jun-ying. Experimental Research on removal of fine particles and heavy metals by chemical agglomeration from the flue gas of 435M2 sintering machine[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2021079

435M2烧结机机头化学团聚强化细颗粒物及重金属脱除试验研究

doi: 10.19906/j.cnki.JFCT.2021079
基金项目: 国家重点研发计划项目课题(2019YFC1907000);湖北省重点研发计划项目(2020BCA076)资助
详细信息
    作者简介:

    揣兴:1262187366@qq.com

    通讯作者:

    Tel:18971412881,E-mail:jyzhang@hust.edu.cn

  • 中图分类号: TK16

Experimental Research on removal of fine particles and heavy metals by chemical agglomeration from the flue gas of 435M2 sintering machine

Funds: The project was supported by the National R&D Program Project of China(2019YFC1907000),the Key Research and Development Program of Hubei Province(2020BCA076)
  • 摘要: 针对某435M2烧结机机头,在静电除尘器前安装化学团聚强化除尘系统,研究化学团聚强化细颗粒物及重金属(As、Cr、Cd、Ni、Cu、Pb、Zn等七种)脱除特性。试验结果表明:化学团聚后,细颗粒团聚成较大颗粒,静电除尘器后烟气中PM10、PM2.5、PM1颗粒质量浓度均降低49%以上,静电除尘器飞灰平均粒度增长46%以上,细颗粒物团聚效果显著,提升了静电除尘器脱除细颗粒物效率;静电除尘器飞灰及细颗粒物中重金属质量浓度上升,静电除尘器后烟气中重金属质量浓度均下降,表明化学团聚作用促使气态重金属向颗粒态重金属及飞灰中迁移,细颗粒重金属团聚长大。化学团聚不仅可以强化细颗粒物的脱除,同时有效提升了重金属的脱除效率。
  • 图  1  烧结机机头化学团聚系统

    Figure  1  Chemical agglomeration system of sintering machine head

    图  2  细颗粒物化学团聚机制

    Figure  2  Chemical agglomeration mechanism of fine particles

    图  3  飞灰粒度分布:(a)一电场飞灰,(b)二电场飞灰,(c)三电场飞灰

    Figure  3  Particle size distribution of fly ash: (a) first electric field fly ash, (b) second electric field fly ash, (c) third electric field fly ash

    图  4  飞灰微观形貌: (a)团聚前,(b)团聚后

    Figure  4  Microstructure of fly ash: (a)Before agglomeration, (b)After agglomeration

    图  5  飞灰XRD谱图

    Figure  5  XRD spectrum of fly ash

    图  6  颗粒物浓度分布

    Figure  6  Concentration distribution of particulate matter

    图  7  团聚作用除尘提升率

    Figure  7  Dust removal rate of agglomeration

    图  8  总尘及PM10+颗粒物中重金属质量浓度变化:(a)总尘,(b)PM10+颗粒物

    Figure  8  Changes of heavy metal concentration in total dust and PM10+ particles: (a) total dust,(b) PM10+ particles

    图  9  细颗粒物中重金属质量浓度变化:(a) As,(b)Cr,(c)Cd,(d) Ni,(e) Cu,(f) Pb,(g) Zn

    Figure  9  Change of heavy metal concentration in fine particulate matter:(a) As,(b)Cr,(c)Cd, (d) Ni,(e) Cu, (f) Pb,(g) Zn

    图  10  烟气中气态重金属质量浓度变化

    Figure  10  Change of gaseous heavy metal concentration in flue gas

    图  11  烟气中气态与PM2.5颗粒物上重金属质量浓度之和变化

    Figure  11  Change of the sum of heavy metal concentrations in gaseous and PM2.5 particles in flue gas

    表  1  飞灰XRD半定量分析结果(wt%)

    Table  1  XRD semi-quantitative analysis results of fly ash (wt%)

    SampleFe2O3CaSO4CaMg(CO3)2CaCO3SiO2KCl
    Fly ash before agglomeration30.619.129.99.83.57.1
    Fly ash after agglomeration29.819.729.510.44.46.2
    下载: 导出CSV

    表  2  固体产物中无机元素含量 (wt%)

    Table  2  The content of inorganic elements in the solid product (wt%)

    ElementsSinterFirst electric field fly ashSecond electric field fly ashThird electric field fly ash
    Before agglomerationAfter agglomerationBefore agglomerationAfter agglomerationBefore agglomerationAfter agglomeration
    Mg 1.48 0.76 1.92 0.77 1.82 0.68 2.02
    Al 1.35 1.28 1.57 1.28 1.15 1.28 1.63
    Si 5.09 1.90 3.37 1.78 3.77 1.52 3.72
    P 0.62 0.15 0.32 0.29 0.27 0.29 0.32
    S 3.01 4.07 3.67 3.22 3.18 3.43 2.66
    Cl 0.26 24.32 22.26 25.35 21.73 34.22 21.70
    K 0.02 3.40 2.21 1.51 1.33 2.35 1.39
    Ca 11.42 9.73 11.84 10.11 11.56 8.97 11.54
    Mn 0.17 0.19 0.19 0.21 0.16 0.22 0.23
    Fe 76.55 51.01 50.90 53.56 53.25 43.97 53.13
    Pb 0.02 1.73 1.75 1.91 1.78 2.89 1.64
    下载: 导出CSV

    表  3  固体产物中重金属含量ω/(μg·g−1)

    Table  3  The content of heavy metals in the solid product ω/(μg·g−1)

    ElementsSinterFirst electric field fly ashSecond electric field fly ashThird electric field fly ash
    Before agglomerationAfter agglomerationBefore agglomerationAfter agglomerationBefore agglomerationAfter agglomeration
    As19.4146.9152.4244.8448.0647.0964.74
    Cr10.7018.7721.4818.1123.8521.9932.84
    Cd0.25145.38222.01152.67222.38167.05221.59
    Cu12.54403.24432.48459.30464.55481.48492.90
    Ni8.487.2510.1612.8816.6514.5630.70
    Pb10.893994.964263.504350.944581.205327.825684.38
    Zn102.891350.021440.371534.941633.351546.681737.77
    下载: 导出CSV
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  • 收稿日期:  2021-08-04
  • 修回日期:  2021-08-30
  • 网络出版日期:  2021-09-29

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