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Chemical agglomeration of fine particles in coal combustion flue gas: Experimental evaluation

机译：煤燃烧烟气中微粒的化学团聚：实验评估

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摘要

Fly ash fine particles emitted from coal-fired power plants are the primary atmospheric pollutant in China. The pressure, temperature, and velocity distribution of the flow field in a chamber was simulated to evaluate chemical agglomeration. The effect on the removal efficiency of composition, concentration, pH, K+ content, and zeta potential of the chemical agglomeration solutions as well as surfactant and flue gas temperature were evaluated. The results suggested that suitable solutions could significantly improve the removal efficiency of fine particles. Among these, kappa-carrageenan performed best and achieved a removal efficiency of 47.1%. Synergism was detected as two different chemical agglomeration solutions were mixed together: a mixture of kappa-carrageenan and konjac glucomannan attained a removal efficiency of 59.3%, higher than their individual values. The efficiency improved initially and then decreased as the solution K+ concentration increased. Also surfactants affected agglomeration: cationic and nonionic surfactants enlarged the removal efficiency by 9.0% and 3.7%, respectively, whereas anionic surfactants lessened average removal efficiency by 5.6%. Zeta potential influenced the removal efficiency as well: it peaked as the zeta potential was around 0 mV. (C) 2017 Published by Elsevier Ltd.
机译：燃煤电厂排放的粉煤灰细颗粒是中国的主要大气污染物。模拟腔室内流场的压力，温度和速度分布，以评估化学团聚。评估了对化学团聚溶液的成分去除效率，浓度，pH，K +含量和ζ电位以及表面活性剂和烟气温度的影响。结果表明合适的溶液可以显着提高细颗粒的去除效率。其中，κ-角叉菜胶表现最好，去除效率为47.1％。当将两种不同的化学团聚溶液混合在一起时，检测到协同作用：κ-角叉菜胶和魔芋葡甘露聚糖的混合物的去除效率为59.3％，高于其各自的值。效率最初提高，然后随着溶液K +浓度的增加而降低。表面活性剂也影响团聚：阳离子和非离子表面活性剂分别使去除效率提高9.0％和3.7％，而阴离子表面活性剂使平均去除效率降低5.6％。 Zeta电位也影响去除效率：它在zeta电位约为0 mV时达到峰值。 （C）2017由Elsevier Ltd.发布

著录项

  • 来源
    《Fuel》 |2017年第1期|557-569|共13页
  • 作者

    Guo Yiquan; Zhang Junying; Zhao Yongchun; Wang Shaolong; Jiang Cheng; Zheng Chuguang;

  • 作者单位

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fine particles; Chemical agglomeration; Removal efficiency; Coal combustion;

    机译：细颗粒;化学团聚;去除效率;煤燃烧;

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