气液旋流器的分离性能

Separation performance of gas-liquid cyclone separator

旋流器内气液两相的分离过程是液滴离心沉降和碰撞聚结、破碎的复合过程。对液滴的聚结、破碎机制进行分析,试验验证液相物性、流场强度对液滴聚结、破碎以及旋流器分离性能的影响。结果表明:液相黏度对涡流场中液滴的破碎影响很大,黏度增大分离效率上升;湍流强度是导致旋流场液滴破碎的主动力,当流量达到一定值时,高湍流强度导致液滴破碎,分离效率随流量上升开始急剧下降;液滴聚结、破碎过程对分离器压力降影响不大。

The separation of gas-liquid two-phase flow in the cyclone separator is a compound process of centrifugal separa-ion, coalescence and breakup of droplets. The mechanism of droplets coalescence and breakup were discussed. The effects of liquid viscosity and turbulence intensity on droplets coalescence, breakup and separation performance were proved by experiments. The experimental results show that the liquid viscosity has much effect on droplets breakup in vortex field, and the separation efficiency increases with the liquid viscosity increasing. The turbulence intensity is the main force which breaks up the droplets. When the flow rate is up to some extent, the high turbulence intensity breaks up the droplets, then the separation efficiency will decrease sharply. While the coalescence and breakup of droplets has little effect on pressure fall in cyclone separator.