FORMATION MECHANISM OF THERMAL NOX IN PULVERIZED COAL COMBUSTION

被引：4
作者：
OKAZAKI, K
SUGIYAMA, K
YURI, I
机构：
[1] Toyohashi Univ, Toyohashi
来源：
JSME INTERNATIONAL JOURNAL SERIES II-FLUIDS ENGINEERING HEAT TRANSFER POWER COMBUSTION THERMOPHYSICAL PROPERTIES | 1991年 / 34卷 / 04期
关键词：
COMBUSTION; SOLID FUEL; COMBUSTION PRODUCTS; FURNACE; CHEMICAL REACTION; FOSSIL FUEL FIRED POWER GENERATION; PULVERIZED COAL COMBUSTION; NOX FORMATION; THERMAL NOX;
D O I：
10.1299/jsmeb1988.34.4_533
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effects of various basic factors of combustion conditions and coal properties on thermal NO(x) formation behaviors in pulverized coal combustion have been experimentally clarified, and a theoretical analysis for the flame structural change around a coal particle has been performed, including full chemical kinetics of prompt NO(x) formation. Thermal NO(x) concentrations much higher than those predicted by the extended Zeldovich mechanism have been experimentally observed even in the usual pulverized coal combustion conditions. The contribution of thermal NO(x) to the total NO(x) rapidly increases with the increase of flame temperature and oxygen-fuel stoichiometric ratio, especially for highly volatile coals. Both the large amount of thermal NO(x) formation and the effects of various factors on it have been well explained by considering the prompt NO(x) formation in the flame zone around each coal particle through HCN and NH formed by the reactions between N2 in air and hydrocarbons in the evoluted volatile matter.
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页码：533 / 539
页数：7
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