330 MW电站煤粉锅炉高温主燃区喷氨脱硝的试验研究  

Experimental Study on Ammonia Injection Denitrification in High-temperature Primary Combustion Zone of a 330 MW Pulverized Coal-fired Utility Boiler

作　　者：白昊 张健[1] 张忠孝[2] 郭欣维 乌晓江[2] 张启超 BAI Hao;ZHANG Jian;ZHANG Zhongxiao;GUO Xinwei;WU Xiaojiang;ZHANG Qichao(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《动力工程学报》2022年第6期537-543,588,共8页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2018YFB0604202)。

摘　　要：在一台330 MW四角切圆煤粉锅炉上进行试验,研究各因素对高温主燃区喷氨脱硝的影响。结果表明:向高温主燃区喷入尿素溶液可有效脱除NO_(x)x,且脱硝效率受锅炉负荷、配风方式和O_(2)体积分数等因素的影响;在锅炉常规运行的基础上进行主燃区喷氨,随着负荷的增加,最佳R_(NSR)增大,脱硝效率降低;相对于基准配风方式,在极限配风方式下进行喷氨可以提高脱硝效率,使最佳R_(NSR)减小;降低锅炉出口O_(2)体积分数可进一步提高主燃区喷氨的脱硝效率;主燃区喷氨与高速燃尽风协同控制可以在减小NO_(x)x质量浓度的同时对飞灰含碳量和CO体积分数进行有效控制。The effects of various factors on ammonia injection denitrification in high-temperature primary combustion zone were studied on a 330 MW corner-tangentially pulverized coal-fired boiler.Results show that NO_(x) can be effectively removed by injecting urea solution into the high-temperature primary combustion zone,and the denitrification efficiency is affected by boiler load,air distribution mode and O_(2) volume fraction.When injecting ammonia into primary combustion zone on the basis of the conventional operation of the boiler,the optimum R_(NSR) increases and the denitrification efficiency decreases with the increase of the boiler load.Compared with the reference air distribution mode,ammonia injection under the extreme air distribution mode can improve the denitrification efficiency and reduce the optimal R_(NSR).Reducing the O_(2) volume fraction at the boiler outlet can further increase the denitrification efficiency of ammonia injection in the primary combustion zone.The combination of ammonia injection in the primary combustion zone and high velocity over-fire air can effectively control the carbon content in fly ash and CO volume fraction,while the mass concentration of NO_(x)x is reduced.

关 键 词：高温主燃区 氨氮物质的量比 喷氨 脱硝效率 高速燃尽风 

分 类 号：TK16[动力工程及工程热物理—热能工程]