燃煤超细颗粒物喷雾团聚的模型

通过对喷雾团聚过程中雾滴和颗粒物的运动和相互作用的分析，结合雾滴干燥理论提出了一个聚团增长的模型.据此模型计算出了不同初始条件（初始雾滴直径，喷雾溶液流量）对喷雾团聚最终参数（雾滴蒸发时间，团聚效率等）的影响.根据计算结果发现：随着喷雾雾滴初始直径的不断增大，最终形成的聚团的直径也不断增大，但是团聚效率却随之降低.而将雾滴初始直径控制在10～20 μm范围内时，可得到最佳的喷雾团聚效果.增大喷雾溶液的流量可提高喷雾团聚的效率，且要达到同样的团聚效率，雾滴初始直径越小，所需的喷雾溶液流量也越小.

Modelling of submicron particle agglomeration in spray process from coal combustion

A model of submicron particle agglomeration during the spray process was developed combining droplet evaporation theory and analysis of the interaction of droplets and particulates. Based on the model， the influences of different original parameters (original droplet diameter， spray solution flux) on ultimate parameters (droplet evaporation time， agglomeration efficiency，etc) were calculated. With  the average original diameter of droplet increasing， the diameter of agglomerates increases and the agglomeration efficiency of spray process decreases. When the average original diameter of droplet is about 10~20 μm， the optimal agglomeration effect can be achieved. Increasing the spray solution flux can get better agglomeration effect and decreasing the original droplet diameter can spare the spray solution.