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碳化对焚烧飞灰“减污降碳”协同处置潜力研究

折开浪 姚光远 赵玉鑫 徐亚 刘玉强

折开浪, 姚光远, 赵玉鑫, 徐亚, 刘玉强. 碳化对焚烧飞灰“减污降碳”协同处置潜力研究[J]. 环境科学研究, 2022, 35(10): 2330-2337. doi: 10.13198/j.issn.1001-6929.2022.06.08
引用本文: 折开浪, 姚光远, 赵玉鑫, 徐亚, 刘玉强. 碳化对焚烧飞灰“减污降碳”协同处置潜力研究[J]. 环境科学研究, 2022, 35(10): 2330-2337. doi: 10.13198/j.issn.1001-6929.2022.06.08
SHE Kailang, YAO Guangyuan, ZHAO Yuxin, XU Ya, LIU Yuqiang. Potential of Carbonization for Co-Disposal of Pollution and Carbon Reduction of Incineration Fly Ash[J]. Research of Environmental Sciences, 2022, 35(10): 2330-2337. doi: 10.13198/j.issn.1001-6929.2022.06.08
Citation: SHE Kailang, YAO Guangyuan, ZHAO Yuxin, XU Ya, LIU Yuqiang. Potential of Carbonization for Co-Disposal of Pollution and Carbon Reduction of Incineration Fly Ash[J]. Research of Environmental Sciences, 2022, 35(10): 2330-2337. doi: 10.13198/j.issn.1001-6929.2022.06.08

碳化对焚烧飞灰“减污降碳”协同处置潜力研究

doi: 10.13198/j.issn.1001-6929.2022.06.08
基金项目: 国家重点研发计划项目(No.2020YFC1806304)
详细信息
    作者简介:

    折开浪(1997-),男,陕西榆林人,skl1026@163.com

    通讯作者:

    ①姚光远(1990-),男,河南长葛人,助理研究员,博士,主要从事固体废物的资源化利用、填埋处置及环境风险控制研究,yaogy@craes.org.cn

    ②刘玉强(1975-),男,安徽蚌埠人,研究员,硕士,主要从事固体废物填埋及场地风险评估研究,liuyq@craes.org.cn

  • 中图分类号: X705

Potential of Carbonization for Co-Disposal of Pollution and Carbon Reduction of Incineration Fly Ash

Funds: National Key Research and Development Project (No.2020YFC1806304)
  • 摘要: 为探究我国不同地区生活垃圾焚烧飞灰“减污降碳”协同处置潜力,选取我国8个典型地区的飞灰为研究对象,采用加速碳化试验模拟飞灰长期填埋场景,通过重金属浸出试验探究碳化前后其重金属浸出浓度的变化情况,通过热重分析研究其对CO2的实际吸收能力,同时基于Steinour方程研究2009—2021年我国飞灰对CO2的理论吸收能力. 结果表明:通过浸出试验得知加速碳化后飞灰中重金属Zn、Cd的浸出浓度分别下降了10%~18%和9%~30%,其中上海市和河南省飞灰样品中Zn的浸出浓度已低于生活垃圾填埋场入场要求. 《生活垃圾焚烧污染控制标准》(GB 18485—2014)的发布实施导致飞灰中碱性成分占比上升,使得飞灰对CO2的吸收潜能增至标准发布之前的约1.38倍. 以贵州省、上海市、山东省、北京市、广东省、辽宁省、河南省、天津市8个不同地区的飞灰样品为例,通过Steinour方程推算得到2020年我国飞灰对CO2的理论吸收量达339.93×104 t,约占2020年我国碳排放总量的0.034%. 对上海市、北京市及河南省3个飞灰样品进行加速碳化试验,通过热重曲线得到飞灰在碳化前后CaCO3分解段的失重率,进一步推算出2020年我国飞灰对CO2的实际吸收量达16.34×104 t,占其理论吸收量的4.8%,飞灰对CO2的实际吸收量小于其理论吸收量的主要原因是,在加速碳化过程中产生的碳酸钙及其他聚合物包裹飞灰,使外部CO2难以进入飞灰内部. 研究显示,加速碳化对飞灰“减污”效果明显,但“降碳”效果仍需对碳化场景以及预处理过程的工艺参数进行优化,以期最大限度地提高飞灰对CO2的实际吸收能力.

     

  • 图  1  我国不同地区飞灰的XRD分析结果

    Figure  1.  XRD analysis results of fly ash from different regions in China

    图  2  我国不同地区飞灰的化学元素组成

    Figure  2.  Chemical elemental composition of fly ash in different regions of China

    图  3  不同飞灰碳化前后热重分析

    Figure  3.  Thermogravimetric analysis of different fly ash before and after carbonization

    图  4  不同飞灰碳化前后SEM的分析结果

    Figure  4.  SEM analysis results before and after carbonization of different fly ash

    表  1  不同飞灰碳化前后中重金属浸出浓度的变化

    Table  1.   Variation of heavy metal leaching concentration in different fly ash before and after carbonization

    项目浸出浓度(mg/L)
    ZnCdPbNiCrHgCuBaAs
    样品编号F2110.49 1.301.880.952.020.840.620.03
    CF2 98.88 1.172.040.900.721.220.930.08
    F4241.0115.263.970.270.073.9 2.040.03
    CF4197.4312.993.670.320.193.363.330.05
    F7115.8012.513.170.410.593.752.340.02
    CF7 99.02 8.533.740.440.182.042.860.04
    GB 16889—2008《生活垃圾填埋场污染控制标准》100 0.150.250.54.50.0510250.3
    注:—表示未检出.
    下载: 导出CSV

    表  2  2009—2021年我国不同地区飞灰的化学组成及CO2吸收能力汇总

    Table  2.   Chemical composition of incineration fly ash in different regions from 2009 to 2021

    年份CO2吸收能力/%成分含量/%飞灰来源数据来源
    CaOSO3Na2OK2OClSiO2
    200933.4716.406.7316.107.2516.0020.70上海市文献[19]
    201031.9632.7710.743.818.5820.5910.77华东地区文献[20]
    201126.4029.806.803.203.5010.8013.90江苏省文献[21]
    201237.0534.475.458.114.4616.724.12湖北省文献[22]
    201331.2534.497.474.933.1313.6810.55广东省文献[23]
    201433.8839.107.243.433.6811.9015.90江苏省文献[24]
    201529.3129.408.782.918.48 8.8023.22湖北省文献[25]
    201642.0038.855.268.076.0216.8010.22江苏省文献[26]
    201743.1349.606.152.545.1712.484.22北京市文献[27]
    201841.9934.559.0010.069.5110.127.65重庆市文献[28]
    201949.7243.205.9012.605.7224.603.00中国南部文献[29]
    202062.9056.604.0014.035.781.47湖北省文献[30]
    202144.1946.032.114.374.7922.5211.75天津市文献[31]
    下载: 导出CSV
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  • 收稿日期:  2022-02-21
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