Effects of the inlet duct length on the flow field and performance of a cyclone separator with a contracted inlet duct

被引：51

作者：

Yao, Yuge ^{[1
]}

Huang, Wenshi ^{[1
]}

Wu, Yuxin ^{[1
]}

Zhang, Yang ^{[1
]}

Zhang, Man ^{[1
]}

Yang, Hairui ^{[1
]}

Lyu, Junfu ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China

来源：

POWDER TECHNOLOGY | 2021年 / 393卷

关键词：

Cyclone separator; Inlet duct length; Contracted inlet duct; Pressure drop; Separation efficiency; PRESSURE-DROP; COLLECTION EFFICIENCY; NUMERICAL-SIMULATION; GAS-FLOW; VELOCITY; PREDICTION; PARTICLES; MODEL; ANGLE; SHAPE;

D O I：

10.1016/j.powtec.2021.07.044

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The inlet duct length may affect the gas flow field and performance of a cyclone separator with a contracted inlet duct. In this study, a numerical simulation using the Eulerian-Lagrangian approach with a one-way coupling method was conducted to evaluate the gas flow field and separation efficiency of the cyclone separators with contracted inlet ducts of different lengths. The simulation results indicated that increasing the inlet duct length led to higher gas tangential velocity in the cyclone body. The effect of the inlet duct length on gas axial velocity was inferior to that on gas tangential velocity. A longer inlet duct reduced both the pressure drop and the separation efficiency. The reductions of the expansion loss at the inlet of the cylinder and friction loss inside the cyclone body contributed the most reduction of the pressure drop as the inlet duct length increased. Generally, when the inlet duct was 1.5 times longer than the cylinder diameter, the effect of inlet duct length on the gas flow field and performance of a cyclone separator became slight. (c) 2021 Elsevier B.V. All rights reserved.

引用

页码：12 / 22

页数：11

共 43 条

[1] An analytical study of the effect of inlet velocity on the cyclone performance using mathematical models [J].

Azadi, Mohsen ;

Azadi, Mehdi .

POWDER TECHNOLOGY, 2012, 217 :121-127

[2] 3-D computational fluid dynamics for gas and gas-particle flows in a cyclone with different inlet section angles [J].

Bernado, S ;

Mori, M ;

Peres, AP ;

Dionísio, RP .

POWDER TECHNOLOGY, 2006, 162 (03) :190-200

[3] The effect of the cyclone length on the performance of Stairmand high-efficiency cyclone [J].

Brar, Lakhbir Singh ;

Sharma, R. P. ;

Elsayed, Khairy .

POWDER TECHNOLOGY, 2015, 286 :668-677

[4] Development and application of the design principle of fluidization state specification in CFB coal combustion [J].

Cai, Runxia ;

Zhang, Hai ;

Zhang, Man ;

Yang, Hairui ;

Lyu, Junfu ;

Yue, Guangxi .

FUEL PROCESSING TECHNOLOGY, 2018, 174 :41-52

[5] A universal model to calculate cyclone pressure drop [J].

Chen, Jianyi ;

Shi, Mingxian .

POWDER TECHNOLOGY, 2007, 171 (03) :184-191

[6] CFD-DEM simulation of the gas-solid flow in a cyclone separator [J].

Chu, K. W. ;

Wang, B. ;

Xu, D. L. ;

Chen, Y. X. ;

Yu, A. B. .

CHEMICAL ENGINEERING SCIENCE, 2011, 66 (05) :834-847

[7] Modeling the gas and particle flow inside cyclone separators [J].

Cortes, Cristobal ;

Gil, Antonia .

PROGRESS IN ENERGY AND COMBUSTION SCIENCE, 2007, 33 (05) :409-452

[8] Effects of the gas outlet duct length and shape on the performance of cyclone separators [J].

de Souza, Francisco Jose ;

Salvo, Ricardo de Vasconcelos ;

Martins, Diego de Moro .

SEPARATION AND PURIFICATION TECHNOLOGY, 2015, 142 :90-100

[9] Effects of cylindrical and conical heights on pressure and velocity fields in cyclones [J].

Demir, Selami ;

Karadeniz, Aykut ;

Aksel, Murat .

POWDER TECHNOLOGY, 2016, 295 :209-217

[10] Separation performance predictions of a Stairmand high-efficiency cyclone [J].

Derksen, JJ .

AICHE JOURNAL, 2003, 49 (06) :1359-1371

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