一体式双极荷电凝并器试验研究及应用构想

Experimental research on bipolar charging integrated agglomerator and its application presumption

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(bipolar charging integrated agglomerator,BCIA),荷电与凝并同时进行,末端设流动凝并单元,并搭建了BCIA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BCIA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,BCIA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。据此,结合烧结机头除尘特点,提出了三区式凝并型电除尘器构想,为除尘系统改造提供了新的途径。

Abstract：An integrated method and device of fine particle bipolar charging and agglomeration have been developed, in which particles charged and agglomerated simultaneously with a set of fluidic agglomeration unit at the end. A comprehensive experimental system has been constructed by using fly ash as test dust. Particle size distribution before and after bipolar charging integrated agglomerator （BCIA）has been analyzed by aerodynamic particle sizer （APS）and emission of electrostatic precipitator （ESP）downstream by on-line dust concentration monitor. The results showed the maximum of agglomeration eigenvalue can reach above 1. 5, while emission of electrostatic precipitator downstream can be reduced by 69.7%. It proved that BCIA has excellent agglomeration performance and was effective in fine particle removal. Based on that, triad zone ESP is presented combined with characteristics of flue gas of head of sintering machines, which supplies a new method for dedusting system upgrading.