双循环旋风分离器阻力性能的实验研究

双循环旋风分离器通过将主进气口设于简体中部,将顶部进气口设为回流口,消除了传统旋风分离器顶部进气口存在的二次流和短路流,进而使大于3μm颗粒的分离效率接近100%.基于工程设计理论的需求,研究了该新设备的阻力性能.利用直径为0.250 m的实验设备,测定了其压降与进口气速的关系,考察了不同结构和操作条件对其阻力性能的影...

Experimental study on pressure drop of double circulation cyclone separator

The main inlet of double circulation cyclone separator is located on the middle part of its cylinder,with the gas inlet at the top of cylinder as a reflux inlet,thus eliminating the secondary flow and short-circuiting flow existing at the first swirl of inlet gas flow,and enhancing the collection efficiency of particles larger than 3 μm nearly 100%.For the need of engineering design,the pressure drop of such new equipment was studied by experimental method.The relationship of pressure drop with inlet gas velocity,different structure and operating conditions was determined by using the equipment with diameter of 0.250 m.The results show that when the inlet gas velocity is 8-21 m/s,and if with a stabilizing cone installed below the bottom of dust duct,the drag coefficients for gas flow at main inlet and reflux inlet are 5.27 and 5.59 respectively,which is 28.5% and 24.2% lower than that of Lapple cyclone separator respectively;if without stabilizing cone installed,the drag coefficients for gas flow at main inlet and reflux inlet are 4.6 and 5.0 respectively.The method of using cyclone separator to collect particles larger than 3 μm completely is found at a cost of consuming more power by reflux circulation.