Analysis of low NO emission in high temperature air combustion for pulverized coal

被引：96

作者：

He, R ^{[1
]}

Suda, T

Takafuji, M

Hirata, T

Sato, J

机构：

[1] Tsing Hua Univ, Dept Thermal Engn, Beijing 100084, Peoples R China

[2] Ishikawajima Harima Heavy Ind Co Ltd, Tech Dev Dept, Yokohama, Kanagawa 2358501, Japan

[3] Ishikawajima Harima Heavy Ind Co Ltd, Corp Business Dev Div, Tokyo 1008182, Japan

来源：

FUEL | 2004年 / 83卷 / 09期

关键词：

pulverized coal; oxides of nitrogen; high temperature air combustion;

D O I：

10.1016/j.fuel.2003.12.010

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

High temperature air combustion experiments for pulverized coal in a large-scale furnace have been done before and shown that the NO emission in the high temperature air combustion is significantly lower than that in the normal temperature air combustion. This paper numerically studies the NO evolution in the large-scale experiments with a simplified chemical reaction model. Through an analysis of numerical results a low NO emission mechanism in the high temperature air combustion has been presented. If the HCN concentration is high. the NO generation is fast. But, the hi.-h HCN and NO concentrations together will make NO destruction fast. It is found that, by properly arranging flow patterns, the high HCN and NO concentrations can be obtained in the vicinity of primary air nozzle. Thus, the generation and destruction of NO can reach an equilibrium point so that the net NO emission rate is low. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1133 / 1141

页数：9

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