化工进展 ›› 2023, Vol. 42 ›› Issue (4): 2101-2108.DOI: 10.16085/j.issn.1000-6613.2022-1031

• 资源与环境化工 • 上一篇    下一篇

飞灰含湿量对耦合电袋除尘器性能影响规律

夏少波1,2(), 段璐2(), 王建朋2, 纪任山2   

  1. 1.煤炭科学研究总院,北京 100013
    2.北京天地融创科技股份有限公司,北京 100013
  • 收稿日期:2022-06-02 修回日期:2022-08-27 出版日期:2023-04-25 发布日期:2023-05-08
  • 通讯作者: 段璐
  • 作者简介:夏少波(1998—),男,硕士研究生,研究方向为燃煤烟气污染物控制。E-mail: xiashaobo0201@163.com
  • 基金资助:
    国家自然科学基金青年基金(51906095);中国煤炭科工集团有限公司国际合作项目(2019-TD-2-CXY003)

Effect of water content of fly ash on the performance of coupling reinforced electrostatic-fabric integrated precipitator

XIA Shaobo1,2(), DUAN Lu2(), WANG Jianpeng2, JI Renshan2   

  1. 1.China Coal Research Institute, Beijing 100013, China
    2.Beijing Tiandi Rongchuang Technology Co. , Ltd. , Beijing 100013, China
  • Received:2022-06-02 Revised:2022-08-27 Online:2023-04-25 Published:2023-05-08
  • Contact: DUAN Lu

摘要:

耦合电袋除尘器在燃煤工业锅炉领域中发展前景广阔。基于耦合电袋除尘器平台,实验研究了不同含湿量飞灰的脱除性能和除尘器运行性能。结果表明:含湿量上升,飞灰堆积密度呈现先减小后增大的趋势,含湿量为0.65%出现谷值。含湿量小于0.65%,除尘器对飞灰的穿透窗口不同,且含湿量增加,出口总尘浓度逐渐降低,整体脱除效率逐渐提高,最终压降和总能耗均逐渐降低,最终压降由含湿量0.31%时的335Pa降低到0.65%时的276Pa,减小了17.61%。除尘器对含湿量0.65%飞灰无穿透窗口,但含湿量高于0.65%,穿透窗口重新出现,且除尘器性能下降。利用质量因子对耦合电袋除尘器整体性能进行综合评价,其随含湿量增加而先增后降,峰值位于含湿量0.64%~0.65%附近。综上,一定范围内提高颗粒含湿量能优化除尘器性能。

关键词: 耦合电袋除尘器, 含湿量, 过滤效率, 能耗, 质量因子

Abstract:

Coupling reinforced electrostatic-fabric integrated precipitator has a promising prospect in the field of coal-fired industrial boilers. The removal performance of coupling reinforced electrostatic-fabric integrated precipitator for different water content and its operational performance were experimentally investigated based on a pilot-scale experimental system. The experimental results showed that the bulk density first decreased and then increased with increasing water content, with valley value at water content of 0.65%. The penetration windows of bag filter distributed at different particle size with water content less than 0.65%, and disappeared with the water content higher than 0.65%. With the water content increasing to 0.65%, the total dust mass concentrations, final pressure drop and the total energy consumption decreased and the collection efficiency increased. The final pressure drop was reduced from 335Pa to 276Pa, with reduction of 17.61%, when the water content rose from 0.31% to 0.65%. However, the total performance became bad with the water content larger than 0.65%. Furthermore, the quality factor was used to comprehensively evaluate the total performance of the coupling reinforced electrostatic-fabric integrated precipitator. It was shown that the quality factor increased and decreased with the increase of water content, with the peak value reaching around 0.64%—0.65%. In summary, the performance of the coupling reinforced electrostatic-fabric integrated precipitator can be enhanced by increasing the water content of the fly ash within certain range, which can provide theoretical guidance for performance optimization of coupling reinforced electrostatic-fabric integrated precipitator.

Key words: coupling reinforced electrostatic-fabric integrated precipitator, water content, filtration efficiency, energy consumption, quality factor

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