陶瓷过滤器滤管脉冲反吹过程的流动特性

在由三根陶瓷滤管组成的实验装置上 ,利用热线风速仪对脉冲反吹时滤管外瞬态流场进行了测定 ,分析了喷吹压力、脉冲宽度、过滤气速和喷吹距离对滤管外流场的影响。随着离开滤管距离的增加 ,喷吹速度和回流速度逐渐减小。结果表明 ,回流现象和喷吹气流沿轴向的不均匀性是影响过滤器脉冲反吹性能的重要因素

Characteristics of Instantaneous Flow Outside Filter Tube of Ceramic Filter During Pulse Backfluch

On a new experimental set up of filter with three ceramic filter elements,the transient velocity outside the filter element is measured by hot wire anemometer during pulse jet cleaning process.The effect of reservoir pressure,pulse duration,filter face velocity and nozzle injector gap on the velocity pulse was investigated.The experimental results show that there exists a remarkable back flow between the pulse jet cleaning and normal filtration process.It is the back flow that makes fine particles released redeposit on the filter element surface and even penetrates the filter element wall.Therefore,it has serous influence on the long term stable operation of industrial ceramic filters.