新型旋流分离一体机的分离性能分析

Analysis of separation performance of novel integral hydrocyclone

针对旋流器无法对粒径在10μm左右的固相颗粒进行有效分离的问题,提出了一种过滤分离与旋流分离相结合的新型结构,并对内部流体速度场、压力场的变化和空气柱的稳定性进行了数值分析,对过滤介质的过滤通量和分离效率进行了实验研究.发现在相同操作参数和结构参数下新型旋流分离一体机具有更稳定的内部流场,内部速度、压力降更大,当粒径大于5μm后旋流分离一体机的分离效率迅速提高,在10μm左右的固相颗粒的分离效率能够达到65%~85%,而实验所用普通旋流器的分离效率在60%以下.

Aimed at the problem that there is no way for an ordinary cyclone to separate solid-phase particles with particle size about ten microns,a new structure of cyclone was presented for combined filtration separation with cyclone separation,the numerical simulation of the variation of velocity and pressure fields in the internal fluid and the stability of the air column there was carried out,and the filtration flux and separation efficiency of the filtering media were studied experimentally.It was found that the new integral filtering hydro-cyclone would have a more stable internal flow field,the internal velocity and pressure drop would be greater under condition of identical operation parameters and structure parameters.When the particle size was more than 5μm,the separation efficiency of the hydrocyclone would be improved rapidly.The separation efficiency of solid particles of about 10μm in diameter could reach 65%to 85%and the average separation efficiency of ordinary cyclone used in experiment would be below 60%.