Initiation of combustion of coal particles coated with a water film in a high-temperature air flow

被引：7

作者：

Zakharevich, A. V. ^{[1
]}

Kuznetsov, G. V. ^{[1
]}

Salomatov, V. V. ^{[2
]}

Strizhak, P. A. ^{[1
]}

Syrodoy, S. V. ^{[1
]}

机构：

[1] Tomsk Polytech Univ, Tomsk 6340050, Russia

[2] Russian Acad Sci, Kutateladze Inst Thermophys, Siberian Branch, Novosibirsk 630090, Russia

来源：

COMBUSTION EXPLOSION AND SHOCK WAVES | 2016年 / 52卷 / 05期

基金：

俄罗斯科学基金会;

关键词：

coal-water fuel; ignition; heat and mass transfer; thermal decomposition; evaporation; water film; ignition delay time; evaporation time; IGNITION; SUBSTANCE; LIQUID;

D O I：

10.1134/S0010508216050063

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Results of an experimental study of ignition of a coal-water fuel in a high-temperature air flow are presented. The fuel is obtained on the basis of the mark D coal or filter cake of the Severnaya dressing plant. Based on the experimental results, physical and mathematical models of the processes of thermal preparation and ignition of coal-water fuel particles are formulated, which take into account the joint proceeding of the most relevant physical and chemical transformations (which exert an essential effect on the ignition condition) and the processes of heat and mass transfer during the induction period. A comparison of the basic ignition characteristics (ignition delay time and limiting values of the gas medium temperature), which are obtained experimentally and theoretically (based on results of numerical simulations), leads to a conclusion that the water film affects the dynamics of the ignition process.

引用

页码：550 / 561

页数：12

共 34 条

[1] Oxy-fuel combustion of pulverized coal: Characterization, fundamentals, stabilization and CFD modeling [J].