余热锅炉汽包内波形板分离器性能试验研究

Experiments on Performance of Corrugated-plate Separator in the Drum of Waste Heat Boiler

针对余热锅炉汽包内常用的无钩、单钩和双钩3种波形板分离器,改变入口风速时对其总分离效率、单级分离效率、入口液滴粒径、出口液滴粒径和阻力系数进行冷态试验研究.结果表明:双钩波形板分离器的总分离效率最高;3种波形板分离器的临界破膜速度分别约为2m/s、5m/s和7m/s;无钩和双钩波形板分离器前3级的单级分离效率远高于后3级;随着入口风速的增大,单钩波形板分离器后3级单级分离效率的上升幅度较大,尤其是第6级单级分离效率的上升幅度最为明显;3种波形板分离器出口液滴粒径均在达到临界破膜速度时迅速增大;单钩波形板分离器的阻力系数远大于无钩和双钩波形板分离器;综合考虑,双钩波形板分离器的性能最优.

Cold-state experiments were performed to the no-hook, single-hook and double-hook corrugated- plate separator in the drum of waste heat boiler, so as to study the total separation efficiency, single-stage separation efficiency, inlet droplet size, outlet droplet size and the resistance coefficient at different inlet air velocities. Results show that the corrugated-plate separator with double hooks has the highest total separation efficiency among all the three separators, and their critical film-breaking velocities are 2 m/s, 5 m/s and 7 m/s, respectively for both the no-hook and double-hook corrugated-plate separator, the single- stage separation efficiency at first three stages is far more than at last three stages for the single-hook cor- rugated-plate separator, the single-stage separation efficiency increases significantly at the last three stages with the rise of inlet air velocity, especially at the sixth stage for all the three separators, the outlet drop- let size rises quickly at the critical film-breaking velocity the resistance coefficient of single-hook corruga- ted-plate separator is far greater than that of no-hook and double-hook one. Based on overall consideration, the double-hook corrugated-plate separator is proved to have the best performance among all the three types.