飞灰含湿量对耦合电袋除尘器性能影响规律  

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

作　　者：夏少波 段璐 王建朋 纪任山 XIA Shaobo;DUAN Lu;WANG Jianpeng;JI Renshan(China Coal Research Institute,Beijing 100013,China;Beijing Tiandi Rongchuang Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[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

出　　处：《化工进展》2023年第4期2101-2108,共8页Chemical Industry and Engineering Progress

基　　金：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)。

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。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.

关 键 词：耦合电袋除尘器 含湿量 过滤效率 能耗 质量因子 

分 类 号：X701.2[环境科学与工程—环境工程]