Effects of Air Staging Conditions on the Combustion and NOx Emission Characteristics in a 600 MW Wall Fired Utility Boiler Using Lean Coal

2013 ◽  
Vol 27 (10) ◽  
pp. 5831-5840 ◽  
Author(s):  
Hu Liu ◽  
Yinhe Liu ◽  
Guangzhou Yi ◽  
Li Nie ◽  
Defu Che
Keyword(s):  
Nox Emission ◽  
Emission Characteristics ◽  
Utility Boiler ◽  
Lean Coal ◽  
Air Staging

Combustion and NOx emission characteristics of a retrofitted down-fired 660MWe utility boiler at different loads

2011 ◽  
Vol 88 (7) ◽  
pp. 2400-2406 ◽  
Author(s):  
Zhengqi Li ◽  
Guangkui Liu ◽  
Qunyi Zhu ◽  
Zhichao Chen ◽  
Feng Ren
Keyword(s):  
Nox Emission ◽  
Emission Characteristics ◽  
Utility Boiler

NOx emission and thermal efficiency of a 300MWe utility boiler retrofitted by air staging

2009 ◽  
Vol 86 (9) ◽  
pp. 1797-1803 ◽  
Author(s):  
Sen Li ◽  
Tongmo Xu ◽  
Shien Hui ◽  
Xiaolin Wei
Keyword(s):  
Thermal Efficiency ◽  
Nox Emission ◽  
Utility Boiler ◽  
Air Staging

Numerical Study on Combustion and NOx Emission Characteristics of Co-Firing Semi-Coke and Coal in a Tangentially-Fired Utility Boiler

2021 ◽  
pp. 411-421
Author(s):  
Qinqin Feng ◽  
Chang’an Wang ◽  
Pengqian Wang ◽  
Zhichao Wang ◽  
Wei Yao ◽  
...  
Keyword(s):  
Numerical Study ◽  
Nox Emission ◽  
Emission Characteristics ◽  
Utility Boiler

Effects of Over Fire Air on the Combustion and NOx Emission Characteristics of a 600 MW Opposed Swirling Fired Boiler

2012 ◽  
Vol 512-515 ◽  
pp. 2135-2142 ◽  
Author(s):  
Yu Peng Wu ◽  
Zhi Yong Wen ◽  
Yue Liang Shen ◽  
Qing Yan Fang ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Experimental Data ◽  
Empirical Method ◽  
Nox Emission ◽  
Emission Characteristics ◽  
Cfd Model ◽  
Nitrogen Release ◽  
Computational Fluid Dynamics Cfd ◽  
Low Nox Emission

A computational fluid dynamics (CFD) model of a 600 MW opposed swirling coal-fired utility boiler has been established. The chemical percolation devolatilization (CPD) model, instead of an empirical method, has been adapted to predict the nitrogen release during the devolatilization. The current CFD model has been validated by comparing the simulated results with the experimental data obtained from the boiler for case study. The validated CFD model is then applied to study the effects of ratio of over fire air (OFA) on the combustion and nitrogen oxides (NOx) emission characteristics. It is found that, with increasing the ratio of OFA, the carbon content in fly ash increases linearly, and the NOx emission reduces largely. The OFA ratio of 30% is optimal for both high burnout of pulverized coal and low NOx emission. The present study provides helpful information for understanding and optimizing the combustion of the studied boiler

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