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

• Ngôn ngữ: eng
• Ký hiệu phân loại: 622.33 *Carbonaceous materials
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2017
• Mô tả vật lý: Size: p. 127-136 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 268061
• Chủ đề: 1. 01 coal, lignite, and peat; 2. Coal rank; 3. Ignition; 4. Oxy-fuel; 5. Pulverized coal

Tóm tắt

 Ignitability is important to characterize pulverized coal combustion, as it is directly related to flame stability. The current paper 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<
 sub>
 2<
 /sub>
  in CO<
 sub>
 2<
 /sub>
 . Finally, 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.