Experimental study on variable load regulation of circulating fluidized bed with high temperature preheated activated fuel  

作　　者：Weijian Song Zihua Tang Guoliang Song Jianguo Zhu Jingzhang Liu Haiyang Wang Yinjiang Zhang 

机构地区：[1]State Key Laboratory of Coal Conversion,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing,100190,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]Datong Institute of Coal Clean and Efficient Utilization,Datong,037000,China

出　　处：《Particuology》2024年第12期178-188,共11页颗粒学报（英文版）

基　　金：supported by the"Key technology and demonstration of deep and flexible peaking for circulating fluidized bed boiler",Strategic Priority Research Program of the Chinese Academy of Sciences (grant No.XDA 29010100).

摘　　要：The circulating fluidized bed(CFB)boiler is an essential option,serving as a flexible power source.However,it is notable that CFB boilers exhibit noticeable limitations in rapid load changes.This study delved into the impact of fuel characteristics on CFB load change rate,combustion efficiency,and original NOx emissions using a 2 MW CFB experimental platform.The findings revealed that blending pulverized coal or modified fuel positively influenced the improvement of CFB load change rate,with blending modified fuel showing a more significant effect.Blending the modified fuel and pulverized coal increased the load change rate within the 50%–100%range by 164.4%and 57.3%,respectively.Additionally,blending pulverized coal and modified fuel significantly reduced NOx emissions,although there remained room for improvement in combustion efficiency.Compared to conventional combustion,blending pulverized coal and blending modified fuel decreased NOx emissions by 35.9%and 41.4%at 100%load,respectively.

关 键 词：Circulating fluidized bed Pulverized coal Modified char Coal gas Load change rate NOx emission 

分 类 号：TK22[动力工程及工程热物理—动力机械及工程]