Comparative ignition tests of coal under oxy-fuel conditions in a standardized laboratory test rig

FUEL

卷:208

Article

Becker, A.¹  Schiemann, M.¹  Scherer, V.¹  Shaddix, C.²  Haxter, D.³  Mayer, J.³ 

[1] Ruhr Univ Bochum, Dept Energy Plant Technol, Bochum, Germany

[2] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA

[3] Uniper Technol GmbH, Dept Chem & Environm Serv, Gelsenkirchen, Germany

关键词: Ignition;    Pulverized coal;    Oxy-fuel;    Coal rank;    Particle size;   

DOI  :  10.1016/j.fuel.2017.06.129

来源: Elsevier

【 摘 要 】

Ignitability is important to characterize pulverized coal combustion, as it is directly related to flame stability. The current work describes a practical test rig for rapid laboratory analysis of pulverized coal cloud ignition properties. The system has been designed for conventional coal combustion conditions using air as the oxidant. In the current work, the measurement principle of the device is described and its adaption to and applicability for oxy-fuel combustion tests is demonstrated. Four coals with different rank were measured in air and in oxy-fuel atmospheres containing 20-35 vol% O-2 in CO2. The major influencing factors for the investigated samples were found to be the coal rank and the gas-phase oxygen concentration, while a minor influence of particle size was observed. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free