中国电机工程学报2018，Vol.38Issue(2)：390-396,7.DOI:10.13334/j.0258-8013.pcsee.171415
循环流化床燃烧的NOx生成与超低排放
Formation and Ultra-low Emission of NOx for Circulating Fluidized Bed Combustion
摘要
Abstract
Increasingly stringent environmental standards made higher demand on the original NOx emissions from circulating fluidized bed (CFB) boilers.Based on the deep understanding of the NOx formation and reduction process during CFB combustion,it is concerned that intensifying reducing atmosphere in different areas of furnace is the key to further excavate potential of original ultra-low NOx emission during CFB combustion.According to the relationship between gas-solid flow characteristics and reducing atmosphere in the furnace,a low NOx combustion technology route was proposed.The core methods are to decrease the average size of bed material and increase the solid circulation rate by improving the performance of recycling system.This technique has been verified in different CFB boilers.The results show that,by optimizing the design and operation of a CFB boiler,when the median particle size of fly ash is smaller than 12μm,the cut size (dg0) is smaller than 54μm,the average diameter of bottom ash is smaller than 200μm,and the suspension solid concentration in dilute phase is higher than 5kg/m3,the original NOx emission can be significantly reduced and meet the requirement of ultra-low emission only through combustion control.It provides a more competitive direction for NOx treatment and low-cost pollution control of CFB boilers.关键词
循环流化床/NOx/超低排放/工程实践Key words
circulating fluidized bed/NOx/ultra-low emission/practice分类
能源科技引用本文复制引用
柯希玮,蔡润夏,杨海瑞,张缦,张海,吴玉新,吕俊复,刘青,李井峰..循环流化床燃烧的NOx生成与超低排放[J].中国电机工程学报,2018,38(2):390-396,7.基金项目
国家重点研发计划项目(2016YFB0600202).The National Key Research Program (2016YFB0600202). （2016YFB0600202）
