气流
煤
锅炉(水暖)
燃烧
点火系统
废物管理
偏转(物理)
渗透(战争)
工程类
机械工程
航空航天工程
化学
运筹学
光学
物理
有机化学
作者
Hejun Du,Zhengqi Li,Mingdi Zhang,Ning Zhang,Zhichao Chen,Jian Song,Fan Fang,Jianjun Su,Haibing Liu
出处
期刊:International Journal of Chemical Reactor Engineering
[De Gruyter]
日期:2022-09-08
标识
DOI:10.1515/ijcre-2022-0141
摘要
Abstract To address the problem of late ignition and poor burnout of Foster-Wheeler down-fired boilers, this study proposed a new combustion technology, which combines adding on arch secondary air and alternately arranging the fuel-lean coal/airflow (FLCA) and fuel-rich coal/airflow (FRCA). The coal particle trajectories of FLCA and FRCA and overall aerodynamic characteristics in the furnace were studied at FRCA and FLCA ratio ( R RL ) of 5:5, 7:3, and 9:1. The results showed that even at a low FRCA ratio, the new combustion technology could still effectively ensure the penetration depth of pulverised coal/airflow. At different R RL values, the main airflow from the arch appeared in the near-wall area and could penetrate downwards into the cold ash hopper area. With an increase in the value of R RL , the deflection degree of FLCA towards the furnace wall increased, while that of FRCA decreased. At R RL of 7:3, both the penetration depth and deflection degree of FRCA and FLCA were at a high level, which was conductive to promoting the burnout and recommended in practical applications.
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