Structure Optimization of Cyclone Separator Based on Computational Particle Fluid Dynamics

doi:10.12096/j.2096-4528.pgt.19178

Abstract

Abstract:

Cyclone separator is the main equipment for particle removal and screening in thermal power plants, and its internal flow characteristics directly affect the performance of cyclone separator. In order to study the influence of the structural difference of the upper cylindrical section of the cyclone separator on its internal particle motion, the numerical simulation of gas-solid two-phase coupled motion in a linear and a spiral separator was carried out by using computational particle fluid dynamics (CPFD). The results show that the average air velocity of the straight section of the spiral separator is higher than that of the linear separator. At the same time, the outlet speed is large. Within a certain inlet velocity range, the spiral separator is slightly superior in separation effect. The research results provide a theoretical reference for the optimization of later practical engineering technology transformation.

Key words: thermal power generation, gas-solid two-phase flow, cyclone separator, computational particle fluid dynamics (CPFD), numerical simulation

CLC Number:

Feng ZHAO, Mingxing SUN, Zhefeng HAO, Deyong CHE. Structure Optimization of Cyclone Separator Based on Computational Particle Fluid Dynamics[J]. Power Generation Technology, 2021, 42(5): 637-642.

Figures/Tables 8

Fig.1 Two different types of cyclone separators

Tab. 1 Physical and numerical parameters

参数	颗粒	流体
密度/(kg/m³)	2 400.000	1.225
杨氏模量/MPa	10	—
黏度/[mg/(m∙s)]	—	18
泊松比	0.3	—
弹性恢复系数	0.97	—
摩擦因数	0.1	—

Fig.2 Particle velocity distribution

Fig.3 Particle volume fraction distribution

Fig.4 Air velocity distribution on the central section

Fig.5 Air velocity distribution on three horizontal sections

Fig.6 Air velocity distribution curve in diameter

Fig.7 Air velocity distribution curve on vertical centerline

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