NO formation and destruction during combustion of high temperature preheated pulverized coal

2021 ◽  
Vol 99 ◽  
pp. 82-87
Author(s):  
Shuai Wang ◽  
Yanqing Niu ◽  
Guangqing Zhu ◽  
Yiyu Ding ◽  
Xiaolian Guo ◽  
...  
Keyword(s):  
High Temperature ◽  
Pulverized Coal ◽  
No Formation

Experimental Study on Carbonization of Low-Rank Pulverized Coal with High Temperature Heat Pipe

2014 ◽  
Vol 953-954 ◽  
pp. 1035-1039
Author(s):  
Li Qun Wang ◽  
Zhong Bo Yi ◽  
Zhong Xiang Wei
Keyword(s):  
High Temperature ◽  
Heat Pipe ◽  
Pulverized Coal ◽  
Holding Time ◽  
Raw Material ◽  
Low Rank ◽  
Experimental Result ◽  
Operating Characteristics ◽  
Temperature Heat ◽  
High Temperature Heat Pipe

Aimed at improving the utilization of pulverized coal, high-temperature heat pipe technology was introduced into lignite carbonization.Under the design of power of 10kw semi-industrial pulverized coal carbonization test equipment, Fugu lignite coal as raw material to investigate the operating characteristics of the device and carbonization characteristics. Experimental result shows that the high temperature heat pipes heat steadily and meet the temperature requirement of low-temperature carbonization. With the extension of the holding time, the semi-coke fixed carbon content increasing, but volatile matter vice versa, however, holding time above 60 minutes, the effect of carbonization is not obvious, and the best carbonization time is 30 ~ 60 minutes. The length of the holding time has little effect on gas composition, the content of H2 and CH4 are relatively higher than the rest gas, (H2 + CH4) gas accounted for 70% of the total, the heating value remains at 18.76 ~ 19.22MJ/m3, belongs to medium-high value gas, could provide for industrial and civilian use.

Numerical Simulation of High-Temperature Air Direct-Ignition of Pulverized Coal

2005 ◽  
Author(s):  
Z. Z. Kang ◽  
B. M. Sun ◽  
Y. H. Guo ◽  
W. Zhang ◽  
H. Q. Wei
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
High Temperature ◽  
Simulation Method ◽  
Pulverized Coal ◽  
Inlet Velocity ◽  
Operation Optimization ◽  
Structure Improvement ◽  
Simulation Results ◽  
Direct Ignition

Numerical simulation method is employed in this article to investigate various high-temperature air direct-ignition processes of pulverized coal (PC). Several important factors are analyzed, which are the inlet velocity of primary air flow, PC concentration and the velocity and temperature of high temperature air. The flow, combustion and heat transfer in high temperature air oil-free ignition burner can also be obtained from the simulation results, which are in accordance with the experimental data. The research provides guidance for structure improvement and operation optimization of burner.

Experimental study on NO formation and burnout characteristics of pulverized coal in oxygen enriched and deep-staging combustion

Fuel ◽  
2020 ◽  
Vol 272 ◽  
pp. 117639
Author(s):  
Tao Zhu ◽  
Yueyi Hu ◽  
Chunli Tang ◽  
Limin Wang ◽  
Xuan Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pulverized Coal ◽  
No Formation

Prediction of unburned carbon and NO formation from low-rank coal during pulverized coal combustion: Experiments and numerical simulation

Fuel ◽  
2016 ◽  
Vol 185 ◽  
pp. 478-490 ◽  
Author(s):  
Kevin Yohanes Lisandy ◽  
Jeong-Woo Kim ◽  
Ho Lim ◽  
Seung-Mo Kim ◽  
Chung-Hwan Jeon
Keyword(s):  
Numerical Simulation ◽  
Coal Combustion ◽  
Pulverized Coal ◽  
Low Rank ◽  
Unburned Carbon ◽  
Pulverized Coal Combustion ◽  
Low Rank Coal ◽  
No Formation

Prediction of Combustion Behavior of Pulverized Coal in High-Temperature Air Combustion

2002 ◽  
Vol 2002.4 (0) ◽  
pp. 7-8
Author(s):  
Takayuki HIROSE ◽  
Rong He ◽  
Toshiyuki SUDA ◽  
Masafumi KAWAI ◽  
Tetsuya HIRATA ◽  
...  
Keyword(s):  
High Temperature ◽  
Pulverized Coal ◽  
High Temperature Air Combustion ◽  
Combustion Behavior

The effect of the mixing characters of primary and secondary air on NO formation in a swirling pulverized coal flame

Fuel ◽  
2005 ◽  
Vol 84 (16) ◽  
pp. 2093-2101 ◽  
Author(s):  
M GU ◽  
M ZHANG ◽  
W FAN ◽  
L WANG ◽  
F TIAN
Keyword(s):  
Pulverized Coal ◽  
No Formation ◽  
Secondary Air

Spectroscopic Observation of Chemical Species From High-Temperature Air Pulverized Coal Combustion

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Nelfa Desmira ◽  
Takuya Nagasaka ◽  
Kimihito Narukawa ◽  
Akira Ishikawa ◽  
Kuniyuki Kitagawa ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperatures ◽  
Flame Temperature ◽  
Chemical Species ◽  
Emission Spectra ◽  
Video Camera ◽  
Spectroscopic Observation ◽  
Pulverized Coal ◽  
In Situ Monitoring ◽  
Lean Combustion

In situ monitoring of chemical species from the combustion pulverized coal in high-temperature air is examined using several different spectroscopic diagnostic at different equivalence ratios. Two-dimensional (2D) distributions of flame temperature were obtained using a thermal video camera. The experimental results showed the temperatures to range from low to 1400 °C under various conditions of fuel-lean, stoichiometric, and fuel-rich. The highest temperature and flame stability were obtained under fuel-lean combustion condition. The chemical species generated from within the combustion zone were analyzed from the spontaneous emission spectra of the flame in the Ultraviolet–visible (UV-Vis) range. The spatial distribution of NO, OH, and CN were identified from the spectra. The 2D distribution of emission intensity visualized and recorded for NO, OH, and CN revealed high-temperatures close to the root of the flame that rapidly dispersed radially outward to provide very high temperatures over a much larger volume at further downstream locations of the flame.

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