师永帅^1,2，朱建国^1,2，王婷婷^1,2，张 震^1,3

(1.中国科学院 工程热物理研究所，北京 100190；2.中国科学院大学 工程科学学院，北京 100049；3.华北电力大学 能源动力与机械工程学院，北京 102206)

DOI:10.13732/j.issn.1008-5548.2022.04.006

收稿日期： 2022-01-03， 修回日期：2022-03-25，在线出版时间：2022-06-23。

基金项目：中国科学院战略性先导科技专项，编号：XDA21040100。

第一作者简介：师永帅(1998—)，男，硕士研究生，研究方向为预热燃烧技术。E-mail：shiyongshuai@iet.cn。

通信作者简介：朱建国(1977—)，男，副研究员，博士，硕士生导师，研究方向为预热燃烧技术。E-mail：zhujianguo@iet.cn。

摘要：为拓宽煤炭的高效清洁利用路径，在千瓦级煤粉预热燃烧综合评价实验平台上，研究预热温度、二次风和三次风当量比、卧式燃烧室温度及过量空气系数对预热燃料水平喷射燃烧特性和NO_x排放的影响。结果表明：随着预热温度升高，卧式燃烧室温度升高，排放的NO_x质量浓度减小；随着二次风当量比增大，卧式燃烧室温度降低，排放的NO_x质量浓度减小；随着卧式燃烧室温度升高，排放的NO_x质量浓度增大；随着过量空气系数增大，卧式燃烧室还原区温度变化小，燃尽区温度降低，排放的NO_x质量浓度增大。

关键词：预热燃料；水平喷射；燃烧特性；NO_x排放

Abstract：In order to broaden the path of efficient and clean utilization of coal, the effects of preheating temperature, equivalence ratio of secondary air and tertiary air, temperature of horizontal combustion chamber and excess air coefficient on the combustion characteristics and NO_x emissions of preheated fuel horizonial injection were studied on the kilowaltt pulverized coal preheating combustion comprehensive evaluation experimental platform. The results show that the temperature of horizontal combustion chamber increases and the mass concentration of NO_x emission decreases with the increase of preheating temperature. The temperature horizontal combustion chamber decreases and the mass concentration of NO_x emission decreases with the increase of secondary air equivalence ratio. The mass concentration of NO_x emission increases with the increase of the temperature of horizontal combustion chamber. With the increase of excess air coefficient, the temperature change of reduction zone in horizontal combustion chamber is small, the temperature in the burnout zone decreases and the mass concentration of NO_x emission increases.

Keywords：preheated fuel; horizontal injection; combustion characteristics; NO_x emission

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