The utility model belongs to the technical field of environmental protection for coal-fired circulating fluidized bed boilers, in particular to a matrix jet device for the SNCR denitrification system of circulating fluidized bed boilers, which is arranged at the entrance flue of the separator of the circulating fluidized bed boilers and/or in the area where the cross section of the boiler hearth satisfies the temperature window of SNCR denitrification; the utility model comprises a cooling air pipe and a denitrification reducing The feeding pipe is welded with pins on the outside surface of cooling air duct and wear-resistant refractory material covering the outside surface of cooling air duct; the cooling air duct is multi-point open along the length direction, with nozzles connected with the denitrification reducing agent solution conveying pipe in the hole; the denitrification reducing agent solution conveying pipe adopts a single connecting pipe structure or multi-connecting pipe parallel structure; the utility model adopts the boiler at the present stage as compared with the present one. The spraying device with spraying guns arranged around the furnace or on both sides of the horizontal flue at the entrance of the high temperature separator greatly improves the uniformity of mixing denitrification reductant solution with flue gas, and improves the denitrification reductant and its utilization efficiency and the denitrification efficiency of SNCR denitrification system.
【技术实现步骤摘要】
用于循环流化床锅炉SNCR脱硝系统的矩阵式喷射装置
本技术属于燃煤循环流化床锅炉环保
,具体涉及一种用于循环流化床锅炉SNCR脱硝系统的矩阵式喷射装置。
技术介绍
循环流化床(CFB)锅炉技术燃烧技术是20世纪70年代末发展起来的清洁煤燃烧技术。与常规燃烧方式相比,CFB锅炉具有一定的优势。CFB锅炉采用较低的燃烧温度(850~920℃)和空气分及燃烧,NOx生成量较低(一般<250mg/m3),并具有一定的自脱硫能力(SO2的实际生成量低于按照全硫计算的SO2理论生成量);CFB锅炉通过炉内干法脱硫(向炉内添加一定量的石灰石颗粒)可有效脱除90%甚至更多的SO2;CFB锅炉具有极佳的燃料适应性,几乎可以设计燃用任何化石燃料;CFB锅炉具有良好的调峰能力,可以再30%额定负荷下不投油稳定燃烧。因此,近二十年间CFB锅炉技术在我国得到迅速发展,CFB锅炉机组发电容量近1亿kW,总循环流化床锅炉台数大于3000台,其工程应用已发展到600MW超临界等级。随着我国经济和生活水平的日益提高,人们将会对环境给予越来越大的关注。我国环保政策也日趋严格,现阶段我国正在逐步 ...
【技术保护点】
1.一种用于循环流化床锅炉SNCR脱硝系统的矩阵式喷射装置,其特征在于:所述矩阵式喷射装置布置在循环流化床锅炉分离器入口烟道处和/或布置在锅炉炉膛截面满足SNCR脱硝温度窗的区域;包括冷却风管(2),设置在冷却风管(2)内的脱硝还原剂溶液输送管(3),焊接在冷却风管(2)外表面的销钉(5)和覆盖在冷却风管(2)外表面的耐磨耐火材料(4),销钉(5)和耐磨耐火材料(4)共同组成矩阵式喷射装置的保温和防磨保护结构;所述冷却风管(2)沿长度方向多点开孔,孔内设置有与脱硝还原剂溶液输送管(3)连通的喷嘴(1);所述脱硝还原剂溶液输送管(3)采用单个连通管结构或多个连通管并联结构,采 ...
【技术特征摘要】
1.一种用于循环流化床锅炉SNCR脱硝系统的矩阵式喷射装置,其特征在于:所述矩阵式喷射装置布置在循环流化床锅炉分离器入口烟道处和/或布置在锅炉炉膛截面满足SNCR脱硝温度窗的区域;包括冷却风管(2),设置在冷却风管(2)内的脱硝还原剂溶液输送管(3),焊接在冷却风管(2)外表面的销钉(5)和覆盖在冷却风管(2)外表面的耐磨耐火材料(4),销钉(5)和耐磨耐火材料(4)共同组成矩阵式喷射装置的保温和防磨保护结构;所述冷却风管(2)沿长度方向多点开孔,孔内设置有与脱硝还原剂溶液输送管(3)连通的喷嘴(1);所述脱硝还原剂溶液输送管(3)采用单个连通管结构或多个连通管并联结构,采用单个连通管结构,则一个连通管供应所有喷嘴(1)的溶液,采用多个连通管并联结构,则每个...
【专利技术属性】
技术研发人员:金森旺,时正海,林伟荣,高洪培,李力,
申请(专利权)人:中国华能集团清洁能源技术研究院有限公司,
类型:新型
国别省市:北京,11
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