循环流化床锅炉掺烧污泥的氮氧化物超低排放研究  

Research on NO_x Ultra-low Emission in CFB Boiler with Sludge Co-combustion

作　　者：韩立鹏[1,2] 刘冠杰 张建东[1,2] 孙剑 王利勇 张译 郭安 HAN Li - peng1,2, LIU Guan - jie1,2, ZHANG Jian - dong1,2, SUN Jian3, WANG Li - yong3, ZHANG Yi3, GU0 An1＇2(1. National Energy R＆D Center of Coal Clean and Low -carbon Power Generation （ Huaneng Clean Energy Research Institute）, Beijing 102209, China; 2. National Research and Development Experiment Center of Clean and Low Carbon Power Generation Technology for Energy Coal, Beijing 102209, China; 3. Huaneng Suzhou Power Plant, Gaoxin District, Suzhou 215129, Jiangsu Province, China)

机构地区：[1]中国华能集团清洁能源技术研究院有限公司,北京102209 [2]国家能源煤炭清洁低碳发电技术研发实验中心,北京102209 [3]华能苏州热电有限责任公司,苏州215129

出　　处：《应用能源技术》2018年第3期21-26,共6页Applied Energy Technology

基　　金：中国华能集团科技项目(K-499016001循环流化床锅炉流态优化改造与NOx超低排放工程应用研究)

摘　　要：对某240 t/h循环流化床锅炉开展了污泥协同掺烧研究、低氮燃烧调整试验和脱硝系统优化。结果显示:污泥掺烧比例6%以下,对锅炉燃烧氮氧化物生成量无明显影响。随着烟气氧量增加锅炉燃烧氮氧化物生成量显著增加,飞灰和底渣的含碳量随风室静压的增加而升高。锅炉低氮燃烧调整试验后,脱硝剂消耗量明显下降,锅炉高负荷节省脱硝剂17.1 L/h,低负荷节省脱硝剂46.9 L/h,NO_x能够高效稳定实现超低排放。高负荷锅炉效率提高了0.15个百分点,优于设计的锅炉效率值;低负荷锅炉效率为91.35%,提高了0.15个百分点。SNCR脱硝系统优化后,脱硝剂消耗量显著降低,节省脱硝剂消耗37.6%。Study of sludge co -combustion and combustion adjustment test have been carried out in in 240 t/h CFB boiler. The results show that no significant effect of NOx emissions when below 6% sludge co - combustion. As the amount of oxygen concentration increases in flue gas, the amount of NOx produced by the boiler increases significantly. The carbon -content in ash and cinder increase with the increase of static pressure in the chamber. After the lowNOx combustion adjustment test, the consumption of deoxidizer decreased obviously, the boiler at high load saving deoxidizer agent 17. 10 L/h the boiler at low load saving deoxidizer agent 46. 9 L/h. Ultra- low NOx emission can be achieved very steadily. The boiler thermal efficiency at high load increased by 0. 15 percentage points, meanwhile boiler thermal efficiency at low load is 91.35% which increased by 0. 15. After the optimization of the selective non - catalytic reduction system, the consumption of the deoxidizer agent is obviously reduced, saving deoxidizer by 37.6%.

关 键 词：污泥 循环流化床锅炉 超低排放 低氮燃烧 锅炉效率 

分 类 号：TK16[动力工程及工程热物理—热能工程] X51[环境科学与工程—环境工程]