摘要
文章结合自稳燃煤粉燃烧实验系统和数值模拟,研究了掺氨比(0%~20%)和空气系数(1.1~1.3)对氨煤混燃NO_(x)生成特性的影响规律。研究表明掺氨比及空气系数对煤粉燃烧过程及NO_(x)生成有很大影响。随着掺氨比增加,炉膛出口NO_(x)浓度先升高后降低,在掺氨比为10%时达到最高、15%时最低。随着空气系数的增加,出口处NO_(x)浓度升高。氨煤混燃对NO_(x)的生成有促进与抑制的双重作用,随着掺氨比增加,氨裂解产生大量氨基抑制NO_(x)的生成,同时空气系数提高会促进NO_(x)的生成。
In this paper,the effects of ammonia ratio(0%~20%)and air coefficient(1.1~1.3)on the NO_(x)formation characteristics of ammonia-coal mixed combustion were studied in combination with self-stabilized pulverized coal combustion experiment system and numerical simulation.The results show that ammonia ratio and air coefficient have great influence on pulverized coal combustion process and NO_(x)generation.With the increase of ammonia ratio,the NO_(x)concentration at the furnace outlet first increases and then decreases,reaching the highest when the ammonia ratio is 10%and the lowest when the ammonia ratio is 15%.With the increase of the air coefficient,the NO_(x)concentration at the outlet also increased.The co-combustion of ammonia and coal has a dual effect of promoting and inhibiting the formation of NO_(x).With the increase of ammonia blending ratio,a large amount of amino groups are produced by pyrolysis to inhibit the formation of NO_(x),and the increase of air coefficient will promote the formation of NO_(x).
作者
李双龙
吴勇
顾明言
位鑫
陈川福
陈杰
黄庠永
Li Shuanglong;Wu Yong;Gu Mingyan;Wei Xin;Chen Chuanfu;Chen Jie;Huang Xiangyong(Anhui University of Technolog)
出处
《冶金能源》
北大核心
2025年第4期62-67,共6页
Energy For Metallurgical Industry
基金
国家自然科学基金资助项目(52376088)。
关键词
氨煤混燃
NO_(x)
掺氨比
空气系数
ammonia-coal co-combustion
NO_(x)
ammonia blending ratio
excess air coefficient
