Pulverized coal combustion: NOx formation mechanisms under fuel rich and staged combustion conditions

1979 ◽  
Vol 17 (1) ◽  
pp. 77-87 ◽  
Author(s):  
J.O.L. Wendt ◽  
D.W. Pershing ◽  
J.W. Lee ◽  
J.W. Glass
Keyword(s):  
Coal Combustion ◽  
Pulverized Coal ◽  
Formation Mechanisms ◽  
Pulverized Coal Combustion ◽  
Staged Combustion ◽  
Nox Formation

A role of hydrocarbon reaction for NOx formation and reduction in fuel-rich pulverized coal combustion

2010 ◽  
Vol 157 (8) ◽  
pp. 1456-1466 ◽  
Author(s):  
Masayuki Taniguchi ◽  
Yuki Kamikawa ◽  
Teruyuki Okazaki ◽  
Kenji Yamamoto ◽  
Hisayuki Orita
Keyword(s):  
Coal Combustion ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion ◽  
Nox Formation

scholarly journals Coal Composition Effects on NOx Formation during Initial Stage of Pulverized Coal Combustion.

1993 ◽  
Vol 19 (3) ◽  
pp. 496-504 ◽  
Author(s):  
Shinji Kambare ◽  
Takayuki Takarada ◽  
Nobuyoshi Nakagawa ◽  
Kunio Kato
Keyword(s):  
Coal Combustion ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion ◽  
Nox Formation ◽  
Composition Effects ◽  
Initial Stage ◽  
Coal Composition

Development and Validation of a Coal Combustion Model for Pulverised Coal Combustion

2010 ◽  
Author(s):  
M. J. Chernetsky ◽  
A. A. Dekterev
Keyword(s):  
Coal Combustion ◽  
Pulverized Coal ◽  
Laboratory Scale ◽  
Combustion Model ◽  
Pulverized Coal Combustion ◽  
Nox Formation ◽  
Coal Particles ◽  
Model Predictions ◽  
Char Burnout ◽  
Development And Validation

To fully understand the processes of heat-and-mass transfer on the laboratory-scale and full-scale coal boilers, computer models are needed to develop, which can predict flow fields, heat transfer and the combustion of the coal particles with reasonable accuracy. In the work reported here, a comprehensive model for pulverized coal combustion has been presented. Attention has been given to the char burnout submodel, NOx formation sub-model and accurate calculation of the temperature of the particles. The model predictions have been compared with the experimental measurements of the laboratory-scale pulverized-coal combustion burner.

Improvement of NOx formation model for pulverized coal combustion by increasing oxidation rate of HCN

Fuel ◽  
2013 ◽  
Vol 113 ◽  
pp. 697-706 ◽  
Author(s):  
Juwei Zhang ◽  
Takamasa Ito ◽  
Takuya Okada ◽  
Emi Oono ◽  
Toshiyuku Suda
Keyword(s):  
Oxidation Rate ◽  
Coal Combustion ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion ◽  
Formation Model ◽  
Nox Formation

Study of NOx Inhibition Technology Based on Water-Gas Reaction

2015 ◽  
Vol 737 ◽  
pp. 584-587
Author(s):  
Tian Hua Wu ◽  
Ren Zhang Qian
Keyword(s):  
Coal Combustion ◽  
Nox Reduction ◽  
Pulverized Coal ◽  
Peak Temperature ◽  
Emission Sources ◽  
Pulverized Coal Combustion ◽  
Staged Combustion ◽  
Combustion Technology ◽  
Low Nox Combustion ◽  
Water Gas

Pulverized coal combustion is one of the main NOx emission sources. The existing low NOx combustion technology can not meet the requirements of environment conservation. In this paper, a new low NOx combustion technology, the NOx inhibition method based on water-gas reaction, is presented, in which steam is injected into the anoxic flame of pulverized coal to bring water-gas reaction and produce CO and H2 which will inhibit the production of NOx. The produced H2 is especially very active. Water-gas reaction is endothermic, which has an effect of reducing the peak temperature of the flame and is very propitious to the inhibition of thermal type NOx. As the water-gas reaction is also an interim process, the heat absorbed in it will be released when burning with oxygen so that the whole amount of heat inside the furnace is not affected. The principle of the method is proved correct by experiments and industrial scale of 420 t/h boiler tests in which the effect of NOx reduction is obvious. The technology is consistent with that of air-staged combustion.

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