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Chemical agglomeration properties of fine particles immersed in solutions and the reduction in fine particle emission by adding emulsion polymers
Fuel Processing Technology ( IF 7.5 ) Pub Date : 2018-06-01 , DOI: 10.1016/j.fuproc.2018.02.027
Lei Zhou , Shu-ying Yang , Wu Chen , Xiao-bei Wang , Zhu-lin Yuan , Lin-jun Yang , Hao Wu

Abstract To reduce the fine particle concentration in coal-fired flue gas, an emulsion agglomeration agent with excellent atomization performance and low viscosity was applied in a chemical agglomeration experiment. The chemical agglomeration properties of an emulsion polymer and a water-soluble polymer on fine particles were compared and investigated experimentally in this study. In addition, the relationship between the mass concentration and solution viscosity was explored, and the atomization performances of a two-fluid nozzle were also studied. The results showed that when the mass concentration of the agglomeration agent increased, the fly ash particles in the solution became larger; moreover, the final agglomerate diameter and the solution viscosity were related to the polymer molecular weight. According to the phase Doppler anemometry (PDA) experimental results, the median diameter (D50) of the agglomeration solution droplets increased as the mass concentration increased, and the atomization property of the emulsion polymer solution was evidently superior to that of the water-soluble polymer solution. In the experimental facility, chemical agglomeration experiments using four kinds of agglomeration agent were carried out, and they proved that the removal efficiency of fine particles was inversely proportional to the median diameter of the atomized solution droplets. Emulsion polymers can greatly enlarge fine particles and reduce the concentration of the fine particles. The removal efficiency of number concentration was improved by 20–25%.

中文翻译:

浸入溶液中的细颗粒的化学团聚特性和通过添加乳液聚合物减少细颗粒排放

摘要 为降低燃煤烟气中细颗粒物浓度,将一种雾化性能优良、粘度低的乳化团聚剂应用于化学团聚实验。在本研究中,比较并实验研究了乳液聚合物和水溶性聚合物在细颗粒上的化学团聚性能。此外,探索了质量浓度与溶液粘度之间的关系,并研究了双流体喷嘴的雾化性能。结果表明,随着团聚剂质量浓度的增加,溶液中粉煤灰颗粒变大;此外,最终团聚体直径和溶液粘度与聚合物分子量有关。根据相多普勒风速仪(PDA)实验结果,团聚溶液液滴的中值直径(D50)随着质量浓度的增加而增加,乳液聚合物溶液的雾化性能明显优于水溶性聚合物解决方案。在实验设备中,进行了使用四种凝聚剂的化学凝聚实验,结果证明细颗粒物的去除效率与雾化溶液液滴的中值直径成反比。乳液聚合物可以极大地放大细颗粒并降低细颗粒的浓度。数浓度的去除效率提高了20-25%。团聚溶液液滴的中值直径(D50)随着质量浓度的增加而增大,乳液聚合物溶液的雾化性能明显优于水溶性聚合物溶液。在实验设备中,进行了使用四种凝聚剂的化学凝聚实验,结果证明细颗粒物的去除效率与雾化溶液液滴的中值直径成反比。乳液聚合物可以极大地放大细颗粒并降低细颗粒的浓度。数浓度的去除效率提高了20-25%。团聚溶液液滴的中值直径(D50)随着质量浓度的增加而增大,乳液聚合物溶液的雾化性能明显优于水溶性聚合物溶液。在实验设备中,进行了使用四种凝聚剂的化学凝聚实验,结果证明细颗粒物的去除效率与雾化溶液液滴的中值直径成反比。乳液聚合物可以极大地放大细颗粒并降低细颗粒的浓度。数浓度的去除效率提高了20-25%。在实验设备中,进行了使用四种凝聚剂的化学凝聚实验,结果证明细颗粒物的去除效率与雾化溶液液滴的中值直径成反比。乳液聚合物可以极大地放大细颗粒并降低细颗粒的浓度。数浓度的去除效率提高了20-25%。在实验设备中,进行了使用四种凝聚剂的化学凝聚实验,结果证明细颗粒物的去除效率与雾化溶液液滴的中值直径成反比。乳液聚合物可以极大地放大细颗粒并降低细颗粒的浓度。数浓度的去除效率提高了20-25%。
更新日期:2018-06-01
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