Numerical analysis of pulverized coal combustion characteristics using advanced low-NOx burner

被引：138

作者：

Kurose, R

Makino, H

Suzuki, A

机构：

[1] Cent Res Inst Elect Power Ind, Yokosuka Res Lab, Kanagawa 2400196, Japan

[2] Cent Res Inst Elect Power Ind, CS Promot Off, Chiyoda Ku, Tokyo 1008126, Japan

[3] CD Adapco JAPAN Co LTD, Nishi Ku, Kanagawa 2208137, Japan

来源：

FUEL | 2004年 / 83卷 / 06期

关键词：

pulverized coal combustion; numerical simulation; advanced low-NOx; burner;

D O I：

10.1016/j.fuel.2003.07.003

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：

A three-dimensional numerical simulation is applied to a pulverized coal combustion field in a test furnace equipped with an advanced low-NOx burner called Cl-alpha burner, and the detailed combustion characteristics are investigated. In addition, the validities of the existing NOx formation and reduction models are examined. The results show that a recirculation flow is formed in the high-gas-temperature region near the Cl-alpha burner outlet, and this lengthens the residence time of coal particles in this high-temperature region, promotes the evolution of volatile matter and the progress of char reaction, and produces an extremely low-O-2 region for effective NO reduction. It is also found that, by lessening the effect of NO reduction in Levy et al.'s model and taking the NO formation from char N into account, the accuracy of the NO prediction is improved. The efficiency factor of the conversion of char N to NO affects the total NO concentration downstream after the injection of staged combustion air. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：693 / 703

页数：11

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