Computational investigation of hydrodynamics, coal combustion and NOx emissions in a tangentially fired pulverized coal boiler at various loads

Particuology ◽  
2021 ◽  
Author(s):  
Jian Chang ◽  
Zhijian Zhou ◽  
Xinrui Ma ◽  
Jinshuo Liu
Keyword(s):  
Coal Combustion ◽  
Pulverized Coal ◽  
Nox Emissions ◽  
Computational Investigation ◽  
Pulverized Coal Boiler ◽  
Coal Boiler

Numerical Analysis of Influence of SOFA on NOx Emissions for Pulverized Coal Boiler

2016 ◽  
Author(s):  
Xiangcun Qi ◽  
Mo Yang ◽  
Yuwen Zhang
Keyword(s):  
Internal Combustion ◽  
Pulverized Coal ◽  
Nox Emission ◽  
Front Wall ◽  
Nox Emissions ◽  
Rear Wall ◽  
Pulverized Coal Boiler ◽  
Optimal Value ◽  
Production Increase ◽  
Coal Boiler

Influences of different SOFA ratios on NOx emission in a tower pulverized coal fired boiler that burners are arranged in the front and the rear wall are investigated in this paper. The front wall is arranged with three layers of burners, and the rear wall is arranged with two layers of burners. The upper layers are the SOFA nozzles. We adopt the method of adding SOFA to reduce NOx emission, and analyze the influence of SOFA on the internal combustion and NOx emissions for pulverized coal boiler. The results show that the addition of SOFA makes the pulverized coal fired boiler form a reduction zone in the main combustion zone, which can inhibit the NOx production increase, so as to achieve the goal of reducing NOx emissions. And the results show that, it is not true that the more SOFA ratio, the less NOx emissions. In fact, the percentage of SOFA has an optimal value, and below or above of this value, NOx yield will increase. Through comparison of different ratios of SOFA distribution modes with the furnace temperature, O2, CO and NOx, we analyze the influence of SOFA ratio on the internal combustion for pulverized coal boiler, and provide some guidance and bases for the optimization of other similar units.

Field measurements on the generation and emission characteristics of PM2.5 generated by utility pulverized coal boiler

2018 ◽  
Vol 91 (6) ◽  
pp. 1009-1020 ◽  
Author(s):  
Qian Du ◽  
Heming Dong ◽  
Donghui Lv ◽  
Lipeng Su ◽  
Jianmin Gao ◽  
...  
Keyword(s):  
Field Measurements ◽  
Pulverized Coal ◽  
Emission Characteristics ◽  
Pulverized Coal Boiler ◽  
Coal Boiler
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