循环流化床锅炉低NOx燃烧环保改造
Low NOx combustion environmental protection modification for circulating fluidized bed boiler
-
摘要: 循环流化床锅炉具有低NOx燃烧的特性，但随着环保要求的不断提高，大部分此种类型锅炉已不能满足现行排放标准，需对原锅炉进行改造。考虑到循环流化床锅炉的结构特点，不适宜进行SCR改造，采用SNCR工艺需具备相应的温度窗口，并且增加还原剂的物料消耗，因此，利用循环流化床炉自身的特点进行局部改造，达到低NOx燃烧的目的，成为一种经济的研究方向。根据某循环流化床锅炉的改造实例探讨具体改造方案及最终效果，提出一种有效的循环流化床锅炉低NOx改造思路。Abstract: The circulating fluidized bed (CFB) boilers have low NOx combustion characteristics. However, with the increasing environmental protection requirement, most of CFB boiler has been unable to meet the existing emission standards, and modification of the original boiler is required. Taking into account the structural characteristics of CFB boiler, it’s not suitable for SCR transformation. The SNCR process requires a corresponding temperature window and increases the material consumption of the reducing agent. Therefore, partial modification of CFB furnace based on its own characteristics to achieve low NOx combustion has become an economic research direction. The specific modification project and the final effect were discussed according to a CFB boiler modification example. This paper presents an effective low NOx modification idea for CFB boilers.
-
Key words:
- circulating fluidized bed /
- boiler /
- lower NOx combustion /
- modification
-
-
[1] 环境保护部.火电厂大气污染物排放标准: GB 13223-2011[S].北京: 中国标准出版社, 2011 [2] 刘洪鹏,王旭东,孙佰仲,等.75 t/h循环流化床锅炉分离器的改造[J].科学技术与工程,2014,14(3):148-151 [3] 段守保.300 MW CFB锅炉大气污染物超低排放改造技术研究[J].洁净煤技术,2016,22(6):88-94 [4] 梁建红,黄中.循环流化床锅炉降低NOx排放浓度试验与优化改造研究[J].锅炉技术,2015,46(2):55-59 [5] 陈建军. 130 t/h循环流化床锅炉低氮燃烧技术的研究与应用[D].杭州：浙江大学,2017 [6] 武世福, 苏铁熊, 张培华, 等.循环流化床锅炉中回转式空预器腐蚀、漏风分析计算[J].科学技术与工程,2015,15(5):108-112 [7] 代培基, 胡晓霞, 罗明鑫. 600 MW循环流化床锅炉燃烧的控制探讨[J]. 中国电力,2016，49(7): 106-108 [8] 王耀昕. 循环流化床燃烧NOx排放特性分析[J]. 热能动力工程, 2016,31(2): 129-132 [9] 张磊, 杨学民, 张培华, 等.循环流化床燃煤过程中NOx和N2O产生-控制研究进展[J]. 过程工程学报,2006,6(6): 1004-1010 [10] 谭力, 李世媛, 李伟, 等. 循环流化床高浓度富氧燃烧实验研究[J]. 中国电机工程学报, 2014,34(5): 763-769 [11] 樊旭, 刘文献, 常建刚, 等. 循环流化床锅炉布风板风帽改造[J]. 热力发电,2009,36(1): 49-50 [12] 于伟静. 燃煤电厂超低改造后烟气测点评估[J]. 电力科技与环保,2017,33(4): 65-68 -
点击查看大图
计量
- 文章访问数: 2542
- HTML全文浏览数: 2432
- PDF下载数: 115
- 施引文献: 0
下载:
