Numerical Simulation on Pneumatic Conveying of Dense Phase Pulverized Coal in Horizontal Pipe at High Pressure

您当前的位置：

首页 >

文章列表页 >

Numerical Simulation on Pneumatic Conveying of Dense Phase Pulverized Coal in Horizontal Pipe at High Pressure

更新时间：2025-05-08

- Numerical Simulation on Pneumatic Conveying of Dense Phase Pulverized Coal in Horizontal Pipe at High Pressure
- Vol. 46, Issue 5, Pages: 38-43(2012)
- 作者机构：
  
  东南大学能源与环境学院,南京,210096
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK16
- Online First：10 May 2012，
  
  Published：2012
- 稿件说明：
移动端阅览
Numerical Simulation on Pneumatic Conveying of Dense Phase Pulverized Coal in Horizontal Pipe at High Pressure[J]. 2012, 46(5): 38-43.
DOI：

Numerical Simulation on Pneumatic Conveying of Dense Phase Pulverized Coal in Horizontal Pipe at High Pressure[J]. 2012, 46(5): 38-43. DOI：

摘要

在充分考虑气固两相相互作用的基础上

利用修正后的κ-ε湍流模型对以CO

为输送介质的高压超浓相煤粉气力输送进行了数值模拟.对于固相体积分数高达25%的高压超浓相煤粉气力输送

采用该模型模拟一体化管道(垂直管、弯管、水平管连接在一起)

获得了水平管段中不同粒径的颗粒在截面上的速度分布、浓度分布

以及不同表观气速下水平管段中固相的径向浓度分布.模拟结果表明

在相同的输送条件下

大粒径煤粉的速度较低

更容易在水平管道沉积; 煤粉粒径相同时

表观气速较大的颗粒在沉积区的浓度分布较小.将模拟结果与相同试验条件下的水平管电容层析成像(ECT)结果进行了对比

验证了本文模拟结果的正确性.

Abstract

The numerical simulation on the pneumatic transmission of ultra-high-pressure dense phase pulverized coal with CO

as the medium was performed by the modified κ-ε turbulence model. In the model

the turbulence interaction between gas and solid particle is considered for the pneumatic conveying of the pulverized coal whose particulate phase concentration is up to 25%. The model was applied to simulate the pneumatic transmission in an integration pipe including a vertical pipe

an elbow pipe

and a horizontal pipe. The velocity and concentration distributions of different size particles on cross sections in a horizontal pipe

and the radial concentration distribution of solid particles at different superficial gas velocities in a horizontal pipe were obtained. The simulation results show that the pulverized coal with larger particle size will dep

osit more easily in the horizontal pipe under the same transport conditions. The concentration distribution in the sedimentary area is smaller at the same size particle and the greater superficial gas velocity. The simulation results are in reasonably good agreement with the experimental data achieved by ECT imaging.

关键词

Keywords

references

徐越, 吴一宁, 危师让. 二段式干煤粉气流床气化技术的模拟研究与分析[J]. 中国电机工程学报, 2003, 23(10): 187-190.

XU Yue,WU Yining,WEI Shirang. Simulation and analysis on gasification technology of a two-stage dry feed entrained flow bed[J]. Proceedings of the CSEE, 2003, 23(10): 187-190.

SRIVASTAVA A, SUNDARESAN S. Analysis of a frictional-kinetic model for gas-particle flow[J]. Powder Technology, 2003, 129(1/2/3): 72-85.

MOLERUS O. Overview: pneumatic transport of solids[J]. Powder Technology, 1996, 88(3): 309-321.

ZHANG Y, REESE J M. Particle-gas turbulence interactions in a kinetic theory approach to granular flows[J]. International Journal of Multiphase Flow, 2001, 27: 1945-1964.

LEVY A. Two-fluid approach for plug flow simulations in horizontal pneumatic conveying[J]. Powder Technology, 2000, 112(3): 263-273.

JAWORSKI A J, DYAKOWSKI T. Investigations of flow instabilities within the dense pneumatic conveying system[J]. Powder Technology, 2002, 125(2/3): 279-291.

GIDASPOW D. Multiphase flow and fluidization: continuum and kinetic theory descriptions[M]. New York, USA: Academic Press, 1994.

蒲文灏. 高压超浓相煤粉气力输送过程及其数值模拟的研究[D]. 南京:东南大学,2009.

JOHNSON P C, JACKSON R. Frictional-collisional constitutive relations for granular materials, with application to plane shearing[J]. J Fluid Mech, 1987, 176(9): 67-93.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Study of the Mechanism of Electrostatic Accumulation and Current Density Distribution Characteristics During Liquid Hydrogen Pipeline Transportation

Numerical Simulation of Space Charge Distribution Characteristics of Polyimide Materials under X-Ray Irradiation

Numerical Simulation Study on Geothermal Extraction Characteristics of Supercritical CO2 in Heterogeneous Fractures

Action Mechanism of Heat Transfer between the Working Medium and the Impeller on Aerodynamic Performance and Flow Characteristics of Radial Inflow Turbines with Supercritical Carbon Dioxide

Analysis of the Attached Vortex Model for the Flow Characteristics of Wing Near-Field Wakes

Related Author

SUN Wenhao

LIU Hongbao

WANG Lei

QING Ziyou

LI Zhuolun

MA Yuan

LI Yanzhong

ZHONG Hui

Related Institution

School of Energy and Power Engineering，Xi’an Jiaotong University

Aerospace System Engineering Shanghai

School of Electrical Engineering，Xi’an Jiaotong University

Northwest Institute of Nuclear Technology

Institute of Electronic Engineering，China Academy of Engineering Physics

⁰