410 t/h燃煤电站高温除尘技术试验研究  

Experimental Research of High Temperature Dust Removal Technology in a 410 t/h Coal-fired Power Station

作　　者：司桐 王春波[1] 陈亮[1] 任育杰 任福春 SI Tong;WANG Chunbo;CHEN Liang;REN Yujie;REN Fuchun(Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,Department of Power Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China;CECEP Industrial Energy Conservation Co.,Ltd.,Beijing 100000,China)

机构地区：[1]华北电力大学动力工程系,河北省低碳高效发电技术重点实验室,河北保定071003 [2]中节能工业节能有限公司,北京100000

出　　处：《动力工程学报》2023年第7期829-834,共6页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2016YFB0600701)。

摘　　要：针对燃煤电站SCR脱硝技术中高浓度飞灰造成的催化剂使用寿命缩短、大量氨逃逸及空气预热器堵灰的问题,将高温除尘器布置在SCR反应器之前。在410 t/h燃煤锅炉上对高温除尘技术进行了工程示范研究,分析了高温除尘器的除尘特性对下游脱硝单元和空气预热器性能的影响。结果表明:在70%和90%锅炉负荷下,高温除尘器出口烟尘平均质量浓度均小于8 mg/m3;90%负荷下,烟气流经高温除尘器的压降仅为500 Pa左右,大幅低于传统布袋除尘器的烟气压降;与典型的超低排放烟气后处理技术相比,应用高温除尘器能实现在相同脱硝效率下显著降低SCR反应器的烟气压降,并能减少相应的气氨消耗量与氨逃逸量;与常规布置布袋除尘器的锅炉环保岛相比,高温除尘器+SCR脱硝单元+空气预热器的模块的烟气压降可降低约500 Pa。For the problems of the shortened catalyst service life,a large amount of ammonia escape and the blockage of air preheater caused by high concentration fly ash in selective catalytic reduction(SCR)denitration technology of the coal-fired power station,the high temperature dust collector was arranged in front of the SCR reactor.An engineering study of high temperature dust removal technology was demonstrated on a 410 t/h coal-fired boiler,and the influence of the dust removal characteristics of the high temperature dust collector on the performance of the downstream denitrification unit and air preheater was analyzed.Results show that the average mass concentration of particulate matter at the outlet of the high temperature precipitator is less than 8 mg/m under 70% and 90% boiler load.The pressure drop of flue gas flowing through the high temperature dust collector is about 500 Pa under 90% boiler load,which is much lower than that of the traditional bag dust collector.Compared with the typical post-treatment technology of flue gas with ultralow emission,the application of high temperature dust collector can significantly decrease the flue gas pressure drop of SCR reactor under the same denitration efficiency,and reduce the corresponding gaseous ammonia consumption and ammonia escape.Compared with the conventional arrangement of bag dust collector,the total pressure drop of high temperature dust collector,SCR denitration unit and air preheater can be approximately decreased by 500 Pa.

关 键 词：空气预热器 高温除尘 烟尘 压降 能耗 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]