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首页> 外文期刊>Energy sources >Investigation on the relationship between slurry droplet entrainment and fine particle emission in the limestone-gypsum WFGD system
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Investigation on the relationship between slurry droplet entrainment and fine particle emission in the limestone-gypsum WFGD system

机译：石灰石 - 石膏WFGD系统中浆料液滴夹带和细颗粒发射关系的研究

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摘要

The entrainment of desulfurization slurry droplets out of the scrubber had a significant influence on the properties of fine particle emissions in the limestone-gypsum desulfurization system. Investigations on the relationship between entrainment of slurry droplets and generation of fine particles during the desulfurization process were carried out with an experimental system. The results showed that a large number of fine droplets and submicron particles existed in the flue gas out of the scrubber, which was attributed to the entrainment of slurry droplets during the desulfurization process. The entrained droplet sizes were closely connected with the slurry atomization characteristics, and majority of them were with sizes less than 20 mu m. The mass ratio of solid contents in entrained and sprayed droplets ranged from 15% to 40%, and particles in the entrained droplets were much smaller. With the increase of superficial gas velocity, liquid-gas ratio, and desulfurization slurry concentration, the proportion of entrained micron droplets was significantly higher. Correspondingly, more fine particles were emitted with increased rates of number concentrations ranging from 20% to 50%. The optimizations of spray scrubber were beneficial for the reduction of entrained droplets and fine particles such as the adjustment of nozzle arrangement and the addition of spray layer. The decrease rate of emitted fine particle concentrations ranged from 10% to 30%.
机译：脱硫浆料液滴从洗涤器中夹带对石灰石 - 石膏脱硫系统中细颗粒排放性质的显着影响。用实验系统进行对淤浆液滴夹带和脱硫过程中细颗粒之间的关系的研究。结果表明，在洗涤器中烟道气中存在大量的细液滴和亚微米颗粒，其归因于在脱硫过程中夹带浆料液滴。夹带的液滴尺寸与浆料雾化特性密切相关，它们的大部分具有小于20μm的尺寸。夹带和喷雾液滴中固体含量的质量比范围为15％至40％，夹带液滴中的颗粒要小得多。随着浅表气体速度，液体 - 气体比和脱硫浆料浓度的增加，夹带的微液滴的比例显着升高。相应地，更细的颗粒以20％〜50％的数量浓度的增加的速率发出。喷雾洗涤器的优化有利于减少夹带的液滴和细颗粒，例如喷嘴布置的调节和喷射层的添加。发射细颗粒浓度的降低率范围为10％至30％。

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  • 来源
    《Energy sources》 |2020年第18期|1691-1704|共14页
  • 作者

    Pan Danping; Gu Conghui; Zhang Dongping; Shi Huangang;

  • 作者单位

    Nanjing Inst Technol Sch Environm Engn 1 Hongjing Rd Nanjing 211167 Jiangsu Peoples R China;

    Jiangsu Univ Sci & Technol Sch Energy & Power Zhenjiang Jiangsu Peoples R China;

    Nanjing Inst Technol Sch Environm Engn 1 Hongjing Rd Nanjing 211167 Jiangsu Peoples R China;

    Nanjing Inst Technol Sch Environm Engn 1 Hongjing Rd Nanjing 211167 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Wet flue gas desulfurization; entrainment; droplet; fine particle; emission;

    机译：湿烟气脱硫;夹带;液滴;细粒子;排放;

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