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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 25, 2012
Accepted September 27, 2012

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Experimental investigation and stability analysis on dense-phase pneumatic conveying of coal and biomass at high pressure

Liang Cai^† Cai Jiaying Xu Guiling Xu Pan Chen Xiaoping Zhao Changsui

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

liangc@seu.edu.cn

Korean Journal of Chemical Engineering, February 2013, 30(2), 295-305(11), 10.1007/s11814-012-0165-2

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Abstract

Conveying characteristics and flow stability are very important for design and control of a conveying system at high pressure. The influences of operating parameters and material properties on conveying characteristics were investigated in an experimental test facility with a conveying pressure up to 4MPa. Wavelet transform and Shannon entropy analysis were applied to analyzing pressure drops through horizontal pipe in order to obtain the stability criterion. Results indicated that the mass flow rate of biomass decreased, while the mass flow rate of pulverized coal increased at first and then decreased with the increase in fluidization velocity. Solid loading ratios for four kinds of powders decreased with the increase in fluidization velocity. Conveying phase diagrams and pressure drops through different test sections of pulverized coal and biomass at high pressure were obtained and analyzed. The influences of coal category,_x000D_ fracture characteristics and particle size on conveying characteristics were determined.

Keywords

Pneumatic Conveying Flow Characteristics High Pressure Stability Shannon Entropy

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