摘要
提出了一种高效去除微细粉尘的一体式双极荷电凝并方法及装置(integrative bipolar charged agglomerator,IBCA)。荷电与凝并同时进行,末端设流动凝并单元。并搭建了IBCA综合试验系统,以电厂粉煤灰为试验粉尘,采用TSI 3321型空气动力学粒径谱仪(aerodynamic particle sizer,APS)及Sintrol 303型粉尘仪在线检测IBCA前后的粉尘粒径分布及凝并器后电除尘器的粉尘排放浓度。试验结果表明:凝并性能随正通道电场强度升高而提高,但负通道场强变化,凝并性能变化不大,凝并电场风速最佳值约7.8 m/s,粉尘浓度与凝并性能负相关,IBCA最优凝并特征值可达1.5以上,且同等条件下可降低其后续电除尘器的排放浓度69.7%,证明其对微细粉尘的净化效果显著。
An integrated method and device of fine particle bipolar charging and agglomeration was presented, in which particles charged and agglomerated simultaneously with a set of fluidic agglomeration unit at the end. A comprehensive experimental system was constructed by using fly ash as test dust. Particle size distribution before and after integrative bipolar charged agglomerator （IBCA） was analyzed by an aerodynamic particle sizer （APS） and emission of electrostatic precipitator downstream by an on-line dust concentration monitor. The results show that agglomeration eigenvalue increase with the rising of operating voltage of positive charged channels but with small changes of negative charged channels. Agglomeration performance is negatively related to dust concentration and the optimum airflow velocity of agglomeration electric field is 7.8m/s. The maximum agglomeration eigenvalue can reach above 1.5, while emission of electrostatic precipitator downstream can be reduced by 69.7%. It proves that IBCA has excellent agglomeration performance and is effective in fine particles removal.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第17期45-50,10,共6页
Proceedings of the CSEE
基金
陕西省科技厅工业攻关项目(2009K01-55)
陕西省教育厅专项科研计划项目(11JK0752)~~
关键词
一体式双极荷电凝并
微细粉尘
凝并特征值
除尘效率
integrative bipolar charged agglomeration
fine particle
agglomeration eigenvalue
collection efficiency
