用于炉内除尘的轴向直流式旋风除尘器的实验研究

Experiment of Axial Flow Cyclone Dust Collector in Furnace for Industrial Boiler

提出锅炉炉内设置除尘器以减轻工业锅炉原始粉尘排放浓度的方法。对适用于炉内除尘的轴向直流式旋风除尘器,影响其除尘效率及阻力系数的几个主要因素进行了实验研究。研究分析了除尘器进口导流叶片角度、出口直径、稳流体长度等对除尘效率和阻力的影响以及除下灰的粒径分布和分级效率。得出合适的出口直径为分离段直径的0.7倍左右;进口角度过小会导致阻力过大,选取60°为宜;稳流体长度设定应考虑除尘效率与阻力系数两方面的权衡。最终建立了适合炉内使用的轴向直流式旋风除尘器结构形式。为工业锅炉本身的性能改进提供了研究分析和实验依据。

Efficient dust boiler is proposed by ex emission control of axial flow cyclone dust collector for industrial perimental study. From research work on the effective factors of collection efficiency and drag coefficient, which are outlet diameter, inlet blade angle, and length of steady flow etc, it is derived that the proper outlet diameter is 0.7 times the size of the diameter of separator, the appropriate inlet blade angle is 60° for drag coefficient trends great while inlet blade angle goes small, and the length of Zsteady flow rests with weighing the effect of collection efficiency and drag coneffcient. Therefore, the configuration of axial flow cyclone dust collector suitable for industrial boiler application is achieved, which applies experimental and research information to the improvement of industrial boiler.