喷嘴结构对SNCR脱硝性能影响的试验研究  

Experimental Study on Influence of Nozzle Structure on SNCR Denitration Performance

作　　者：段璐 DUAN Lu(Beijing Tiandi Rongchuang Technology Co.,Beijing 100013,China)

机构地区：[1]北京天地融创科技股份有限公司,北京100013

出　　处：《工业炉》2024年第4期8-14,共7页Industrial Furnace

基　　金：“煤科院节能技术有限公司科技发展基金项目”,项目编号:2022JNSJ-01;“北京天地融创科技股份有限公司科技发展基金项目”,项目编号:2023RCCX-03。

摘　　要：针对一台20 t/h燃煤工业锅炉,研究了5种喷嘴的流量特性及其对选择性非催化还原技术(SNCR)脱硝性能的影响,建立了喷嘴流量与气、液压力间的关系。结果表明:喷嘴流量随液压升高、气压降低而增大,扇形喷嘴流量小于锥型喷嘴且对气、液压力较为敏感;炉膛中部处于SNCR最佳反应温度区且温度分布较为均匀,脱硝效率较高;扇形120°喷嘴的脱硝效率最佳,因此,在实际应用中选择角度较大的扇形喷嘴能够取得较好的脱硝性能。A study was conducted on the flow characteristics of five types of nozzles and their impact on selective non-catalytic reduction(SNCR)denitration performance for a 20 t/h coal-fired industrial boiler.The relationship between nozzle flow rate and pneumatic and hydraulic pressure was established.The results show that the nozzle flow rate increases with the increase of hydraulic pressure and the decrease of pneumatic pressure.The flow rate of the fan-shaped nozzle is smaller than that of the conical nozzle and is more sensitive to pneumatic and hydraulic pressure.The middle of the furnace is located in the optimal reaction temperature zone of SNCR and the temperature distribution is relatively uniform,resulting in a high denitration efficiency;The fan-shaped nozzle with an angle of 120°has the best denitration efficiency,therefore,selecting a fan-shaped nozzle with a larger angle in practical applications can achieve better denitration performance.

关 键 词：SNCR 喷嘴结构 流量 脱硝效率 温度分布 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]