旋风除尘器减阻节能技术的研究与应用

Research and application of stick drag-reduction and energy-saving technology in a cyclone separator

通过安装在旋风除尘器内适当位置处的减阻杆,可以在保证分离效率的前提下降低流动阻力,实现设备的节能增产。分别采用五孔球形探针、激光多普勒测速仪和粒子图像测速仪对旋风除尘器内安装减阻杆前后的时均流场与湍流场进行了测量,发现减阻杆降低了流场中于粉尘分离无益的内旋流切向速度,削弱了中心区域的湍流强度,使湍流耗散减弱,从而实现减阻。工业应用实例表明旋风除尘器减阻杆技术是可行的,而且取得了显著的经济效益。

A stick inserted in proper position of cyclone separator could reduce the drag while keeping the separation efficiency unchanged, consequently lower energy consumption and increase output. The mean velocity and turbulent characteristic of flow field in the cyclone separators with and without stick were measured by five-orifice Pitot-tube, Laser Doppler Velocimetry (LDV) and Particle Imaging Velocimetry (PIV) , respectively. It was found that drag reduction was caused by lowering the tangential velocity of inner vortex that was not helpful to particle separation and weakening the turbulent intensity of inner zone to eliminate turbulent dissipation. Industrial application showed that the stick drag-reduction technology for cyclone separator was practical, resulting in good economic benefits.