Measurement of separation performance and numerical analysis on flow field of different cyclone separators in parallel

被引:0
|
作者
Chen J. [1 ,2 ]
Gao R. [1 ]
Liu X. [1 ]
Li Z. [1 ]
机构
[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing
[2] Beijing Key Laboratory of Process Fluid Filtration and Separation, Beijing
来源
Chen, Jianyi (jychen@cup.edu.cn) | 2016年 / Materials China卷 / 67期
基金
中国国家自然科学基金;
关键词
Cyclone separator; Flow field; In parallel; Measurement; Numerical analysis;
D O I
10.11949/j.issn.0438-1157.20160399
中图分类号
学科分类号
摘要
Three different cyclone separators with diameter of 300 mm, PV-1, PV-2 and PV-3, were designed by changing either the direction of rotation or the diameter of vortex finder. PV-1 differed from PV-2 in the direction of rotation, while PV-3 differed from PV-1 in the diameter of vortex finder. These cyclone separators were assembled center-symmetrically in three paralleled arrangements as assembly of same cyclones (Parallel-I), assembly of various rotation (Parallel-II) and assembly of various vortex finder (Parallel-III). Parallel-I was consisted of four PV-1 cell cyclones; Parallel-II was consisted of two PV-1 cyclones and two PV-2 cyclones; Parallel-III was consisted of two PV-1 cyclones and two PV-3 cyclones. Separation performances of single cyclone and cyclone assemblies were studied in a cold state experimental setup under a condition of solid loading at 5 g·m-3 and inlet velocities ranging from 14-26 m·s-1. The flow fields in these paralleled cyclones were simulated with FLUENT software. The results show that paralleled cyclones had higher efficiency than single one with no hump in the curve of efficiency versus inlet velocity. Compared to Parallel-I, Parallel-II was lower in both total pressure drop and efficiency due to weaker swirl flow. Gas throughput was evenly distributed among each cell cyclone and no cross flow was observed in the common dust bin of either Parallel-I or Parallel-II. However, Parallel-III had higher total pressure drop than Parallel-I. Because Parallel-III was composed of cell cyclones with different vortex finder, gas throughput in Parallel-III was no longer evenly distributed and an average deviation of about 6.0% was observed between the inlet and outlet of each cell cyclone. A cross flow in the common dust bin was also happened from PV-3 to PV-1, which forced some collected particles back to the inner flow, weakened the stability of vortex flow and decreased separation efficiency. Therefore, the same type of cyclone separators should be assembled center-symmetrically in parallel in order to ensure high separation efficiency of paralleled cyclones. © All Right Reserved.
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页码:3287 / 3296
页数:9
相关论文
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