Influence of vent air valve opening on combustion characteristics of a down-fired pulverized-coal 300 MWe utility boiler

被引：63

作者：

Li, Zhengqi ^{[1
]}

Ren, Feng ^{[1
]}

Zhang, Jie ^{[1
]}

Zhang, Xiaohui ^{[1
]}

Chen, Zhichao ^{[1
]}

Chen, Lizhe ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

来源：

FUEL | 2007年 / 86卷 / 15期

关键词：

down-fired boiler; cyclone; NOx;

D O I：

10.1016/j.fuel.2007.01.035

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：

Industrial experiments have been performed on a down-fired pulverized-coal 300 MWe utility boiler with vent air valve opening of 100% and 40%. The gas temperature distribution along the primary air and coal mixture flow, gas temperature distribution in the furnace, and gas components such as O-2, CO, CO2 and NOx in the near-wall region were measured for the first time. The influence of vent air valve opening on coal combustion in the furnace was determined. The results indicate that ignition of the primary air and pulverized-coal mixture is delayed. The position of the gas temperature peak is above the arches. Emission of NOx is up to 2101 mg/m(3) (at 6% 02 dry) with vent valve opening of 40%. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2457 / 2462

页数：6

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