喷淋脱硫塔内除雾器运行特性

Operating Characteristics of Mist Eliminator in Desulfurization Spray Tower

除雾器的除雾效果对脱硫系统的稳定运行、烟道腐蚀及烟气排放有重要影响,研究不同空塔流速及组合条件下除雾器的除雾性能很有必要。为此,建立了接近实际工程的喷淋脱硫塔实验台,研究了空塔流速、喷淋层与除雾器距离、不同雾化喷嘴等对除雾器出口液滴含量、粒径分布的影响,以及管式除雾器性能。研究结果表明:空塔流速对一级除雾器出口液滴含量的影响较大,对二级除雾器出口液滴含量有一定影响;除雾器出口液滴粒径随空塔流速提高而减小;喷嘴雾化粒径变小后,一级除雾器出口液滴含量明显增加;喷淋层与除雾器间距对一级除雾器出口液滴含量有较大影响;管式除雾器对除雾器出口液滴含量影响不大。

The performance of mist eliminator （ME） is of great significance for stable desulfurization system operation, flue corrosion and gas emissions. Therefore, it is necessary to study the ME performance under different empty tower gas velocities and other combinations. In this paper, a test spray tower similar to actual projects is established to explore the effects of gas velocity, the space between the spraying layer and ME, and atomizing nozzle on the droplet contents of ME outlet and droplet size distribution, as well as the performance of pipe-type ME. The result shows that the gas velocity has great influence on the droplet contents of the first ME outlet and some effects on that of the second ME outlet. The droplet size decreases with the gas velocity increasing. The droplet contents of the first ME outlet increase significantly when the spray particle turns small, and they are greatly influenced by the space between the spraying layer and ME. The pipe-type ME has little effect on the outlet droplet contents.