电站锅炉NO_x排放特性试验研究  

Test Study on NO_x Emission Characteristic for Power Station Boiler

作　　者：高继录[1] 王文生[1] 李志龙[2] 冷杰[1] 

机构地区：[1]辽宁省电力有限公司电力科学研究院,辽宁沈阳110006 [2]神华国华绥中发电有限责任公司,辽宁葫芦岛125222

出　　处：《东北电力技术》2012年第11期10-12,16,共4页Northeast Electric Power Technology

摘　　要：针对某热电厂300 MW锅炉,通过改变燃尽风量、运行氧量、机组负荷等参数,研究了不同燃烧方式对锅炉NOx排放量的影响。结果表明:随着燃尽风挡板开度增大,NOx排放浓度逐渐降低,燃尽风挡板全开时NOx排放浓度比开度为30%时降低19%;随氧量增多,NOx排放浓度逐渐增大,省煤器出口氧量为4.25%时的排放浓度比氧量为3.35%时升高43.5%;在锅炉降负荷过程中,炉膛内含氧量比炉膛温度的影响更大,210 MW负荷下NOx排放浓度比300 MW负荷增大12.8%。By changing the parameters of over-fired flow,operation oxygen flow,and unit load,the effect of different combustion manner on NOx emission of boiler is studied for given 300 MW boiler in thermal power plant.The results show that NOx emission concentration decreases as over-fired baffel opening increasing.NOx emission concentration with over-fired baffle 100% opening reduces 19% than with over-fired baffle 30% opening.NOx emission concentration gradually increases as oxygen flow increases.NOx emission concentration when outlet oxygen of economizer is 4.25% increases 43.5% than when outlet oxygen of economizer is 3.35%.The effect of oxygen content in the furnace is greater than the effect of furnace temperature at the course of boiler load fall.NOx emission concentration under 210 MW load enhances 12.8% than under 300 MW.

关 键 词：燃煤锅炉 NOX排放量 燃烧调整 配风方式 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程] TK222