燃烧器改造对低氮燃烧效果影响
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摘要
为解决储仓式制粉系统、四角切圆燃烧方式的300 MW机组锅炉燃烧贫煤时炉膛出口排放NO_x质量浓度较高(900～1 000 mg/Nm~3)的问题,在进行燃烧器改造后炉膛出口排放NO_x质量浓度降至550 mg/Nm~3左右;国家和地方环保标准提高后需进一步降低,遂又进行了燃烧器三次风重新布置、部分三次风引入主燃烧区进行助燃改造,炉膛出口排放NO_x质量浓度降至480 mg/Nm~3左右,为同类型锅炉低氮燃烧改造提供了借鉴意义。
To solve the NO_x concentration is higher(900-1 000 mg/Nm~3) when burn lean coal on storage type pulverizing system, four way tangential firing boiler of 300 MW, the chamber of a stove or furnace outlet NO_x concentration to 550 mg/Nm~3 after burner alteration. National and local environmental standards improve need to further reduce, after tertiaryair then ran a burner wind to rearrange, part tertiaryair into the main combustion zone combustion-supporting renovation, the chamber of a stove or furnace outlet NO_x concentration down to about 480 mg/Nm~3, low nitrogen combustion retrofit for similar boiler provides reference.
To solve the NO_x concentration is higher(900-1 000 mg/Nm~3) when burn lean coal on storage type pulverizing system, four way tangential firing boiler of 300 MW, the chamber of a stove or furnace outlet NO_x concentration to 550 mg/Nm~3 after burner alteration. National and local environmental standards improve need to further reduce, after tertiaryair then ran a burner wind to rearrange, part tertiaryair into the main combustion zone combustion-supporting renovation, the chamber of a stove or furnace outlet NO_x concentration down to about 480 mg/Nm~3, low nitrogen combustion retrofit for similar boiler provides reference.
引文
[1]周杨军.三次风布置方式对锅炉出口氮氧化物排放影响[J].华电技术, 2016(11):69-71.
[2]周菊华,操高城,郝杰.电厂锅炉[M]. 2版.北京:中国电力出版社, 2009:111-112.
[3]汪军,马其良,张振东.工程燃烧学[M].北京:中国电力出版社, 2018:382-386.
[4]庄正宁.环境工程基础[M].北京:中国电力出版社, 2006.
[5]杨宏民,石晓峰.锅炉设备及其系统[M].北京:中国电力出版社, 2014:129.
[2]周菊华,操高城,郝杰.电厂锅炉[M]. 2版.北京:中国电力出版社, 2009:111-112.
[3]汪军,马其良,张振东.工程燃烧学[M].北京:中国电力出版社, 2018:382-386.
[4]庄正宁.环境工程基础[M].北京:中国电力出版社, 2006.
[5]杨宏民,石晓峰.锅炉设备及其系统[M].北京:中国电力出版社, 2014:129.