水平管段高压超浓相煤粉输送特性的数值模拟

胥宇鹏; 熊源泉; 周海军; 贺春辉; 陈先梅; 沈湘林

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水平管段高压超浓相煤粉输送特性的数值模拟

更新时间：2025-05-08

- 水平管段高压超浓相煤粉输送特性的数值模拟
- Numerical Simulation on Pneumatic Conveying of Dense Phase Pulverized Coal in Horizontal Pipe at High Pressure
- 西安交通大学学报 2012年46卷第5期页码：38-43
- 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：
  
  : 2011-09-25. 作者简介: 胥宇鹏(1986-),男,硕士生;熊源泉(通信作者),男,教授,博士生导师. 基金项目: 国家重点基础研究发展计划资助项目(2010CB227002-02);国家高技术研究发展计划资助项目(2011AA05A201)
- DOI：
  中图分类号： TK16
- 网络首发：2012-05-10，
  
  纸质出版：2012
- 稿件说明：
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胥宇鹏, 熊源泉, 周海军, 等. 水平管段高压超浓相煤粉输送特性的数值模拟[J]. 西安交通大学学报, 2012,46(5):38-43.

Numerical Simulation on Pneumatic Conveying of Dense Phase Pulverized Coal in Horizontal Pipe at High Pressure[J]. 2012, 46(5): 38-43.
胥宇鹏, 熊源泉, 周海军, 等. 水平管段高压超浓相煤粉输送特性的数值模拟[J]. 西安交通大学学报, 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.

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references

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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.

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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.

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