湿式振弦除尘器气液分离机理与实验研究

Gas-liquid separation mechanism and experimental study of wet vibrating grid precipitator

以直径为0.2mm不锈钢丝为振弦,研究风速、振弦丝层数、振弦丝间距对振弦栅除雾效率的影响,并将纤维过滤理论引入湿式振弦除雾机理研究中,认为单根振弦丝的气液分离机理主要是惯性碰撞和拦截效应的共同作用,给出了整个振弦栅的除雾效率理论式。结果表明,在3～5m/s风速范围内,风速对振弦栅气液分离效果影响较小;随着振弦丝层数的增加和振弦丝间距的减小,振弦栅除雾效率明显提高。

Effects of gas velocity, grid layer and wire distance on the mist separation efficiency of vibrating grid composed of stainless steel wires with a diameter of 0.2 mm were studied, and the fabric filtration theory was introduced into the discussion of gas-liquid separation mechanism for the vibrating grid precipitator. It was found that the main separation mechanisms of single vibrating wire are the combined effect of both inertial impaction and interception. A theoretical formula about the mist separation efficiency of the overal grids was proposed. The experimental results show that gas velocity in the range of 3～5 m/s has less effect on the separation efficiency, and the mist separation efficiency significantly improves with the increase of grid layer or the reduction of wire distance.