颗粒特性对超重力湿法除尘性能的影响

Effect of particle characteristics on the performance of high gravity wet dedusting technology

工业锅炉粉尘成分复杂,颗粒物性差别很大,若采用常规除尘器,无法达到高效脱除。超重力旋转填料床是一种新型的除尘设备,能耗低,除尘效率较高。为探究粉尘颗粒物性对超重力湿法除尘性能的影响,选取吹风气锅炉粉尘和生物质锅炉粉尘两种工业锅炉粉尘,以错流旋转填料床为除尘设备,进行了除尘实验。实验分别测定了粉尘颗粒的粒径、有效密度和润湿性,并采用单因素实验方法,考察了粉尘脱除效率随超重力因子、气量和液量的变化规律。研究结果表明:从粉尘物性角度分析,两种粉尘差异较大,吹风气锅炉粉尘更适用于湿法除尘技术,相应的,在相同的操作条件下,吹风气锅炉粉尘的脱除效率高于生物质锅炉粉尘。但在各自的最适宜操作条件下,两者的脱除效率分别可达91.48%、90.23%。可见,超重力湿法除尘技术受粉尘颗粒特性的影响较小,能够高效脱除工业锅炉粉尘,应用前景广阔。

Industrial boilers have complex dust components and large differences in particle properties. If conventional dust collectors are used, they cannot be efficiently removed. High gravity rotating packed bed is a new type of dust removal equipment, which can effectively reduce energy consumption and improve dust removal efficiency. Two kinds of industrial dusts, gas boiler dust and biomass boiler dust, were studied on dust removal experiment with the cross-flow rotating packed bed used as dust removal equipment to explore the effect of particle characteristics on the performance of high gravity wet dedusting technology. The particle size, effective density and wettability of dust particles were measured in the experiment. Meanwhile, the effects of rotation speed, gas flow rate and liquid flow rate on dust removal efficiency were investigated by using single factor experimental method. The results show that there are distinctly different characteristics between the above two dusts and the gas boiler dust is more suitable for the traditional wet dust removal method. For dust removel efficiency, gas boiler dust is higher than that of biomass boiler dust under the same conditions. However, under their respective optimum operating conditions, the removal efficiency of the two dusts can reach 91.48% and 90.23%, respectively. It can be seen that the ultra-gravity wet dust removal technology is less affected by the characteristics of dust particles, and can effectively remove industrial boiler dust, and has a broad application prospect.