Simulation and Application of NOX Emission Characteristics in the Vertical Flue of 6 m Coke Oven

2021 ◽  
Author(s):  
Fu-jun Liu ◽  
Ke-Liang Pang ◽  
Chao Wang ◽  
Ji Wu ◽  
Qiu-ye Cai
Keyword(s):  
Coke Oven ◽  
Nox Emission ◽  
Emission Characteristics

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

Effect of Cetane Number Improver on Emission Characteristics of Methanol/Diesel Blend Fuel

2012 ◽  
Vol 512-515 ◽  
pp. 1888-1891
Author(s):  
Jia Yi Du ◽  
Wei Xun Zhang ◽  
Deng Pan Zhang ◽  
Zhen Yu Sun
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Cetane Number ◽  
Nox Emission ◽  
Fuel Load ◽  
Emission Characteristics ◽  
Soot Emission ◽  
Maximum Torque ◽  
Blend Fuel ◽  
Co Emission

The influence of cetane number improver on emission characteristics of diesel engine fueled with methanol/diesel blend fuel was investigated. Methanol/diesel blend fuel was prepared, in which the methanol content is 10%, different mass fraction (0%，0.5%) of cetane number improver were added to the blend fuel. Load characteristic experiments at maximum torque speed of the engine were carried out on 4B26 direct injection diesel engine. The results show that, compared with the engine fueled with diesel, the CO emission increases under low loads and reduces under medium and high loads, the HC emission increases, the NOx emission decreases under medium and low loads and increases under high loads, the soot emission reduces significantly when the diesel engine fueled with blends. When cetane number improver was added to blends, the CO and NOx emission reduces, the HC emission decreases, the soot emission increases to some extent compared with the methanol/dieselblend fuel without cetane number improver.

Experimental study on NOx emission characteristics of oxy-biomass combustion

2018 ◽  
Vol 199 ◽  
pp. 400-410 ◽  
Author(s):  
Imran Ali Shah ◽  
Xiang Gou ◽  
Qiyan Zhang ◽  
Jinxiang Wu ◽  
Enyu Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Nox Emission ◽  
Biomass Combustion ◽  
Emission Characteristics

Simulation Investigation on NOx Emission Characteristics and Mechanisms During Co-combustion of Fossil Fuels with Different Fuel-Nitrogen Distributions via CHEMKIN

2021 ◽  
pp. 739-750
Author(s):  
Chaowei Wang ◽  
Chang’an Wang ◽  
Lin Zhao ◽  
Maobo Yuan ◽  
Pengqian Wang ◽  
...  
Keyword(s):  
Fossil Fuels ◽  
Nox Emission ◽  
Emission Characteristics

Combustion and NOx emission characteristics of dual-stage lean premixed flame

2019 ◽  
Vol 160 ◽  
pp. 113951
Author(s):  
Wenhua Zhao ◽  
Penghua Qiu ◽  
Li Liu ◽  
Wenkai Shen ◽  
Yajin Lyu
Keyword(s):  
Premixed Flame ◽  
Nox Emission ◽  
Emission Characteristics ◽  
Lean Premixed ◽  
Dual Stage

Influence of Separated Overfire Air Ratio and Location on Combustion and NOx Emission Characteristics for a 600 MWe Down-Fired Utility Boiler with a Novel Combustion System

2015 ◽  
Vol 29 (11) ◽  
pp. 7630-7640 ◽  
Author(s):  
Lun Ma ◽  
Qingyan Fang ◽  
Dangzhen Lv ◽  
Cheng Zhang ◽  
Gang Chen ◽  
...  
Keyword(s):  
Nox Emission ◽  
Emission Characteristics ◽  
Combustion System ◽  
Utility Boiler

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
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