Effect of Micronized Coal Reburning on NOX Reduction

Author

He Dandan ; Jin Jing ; Cai Canwen ; Lu Yao

Author_Institution

Coll. of Energy & Power Eng., Univ. of Shanghai for Sci. & Technol., Shanghai, China

fYear

2011

fDate

25-28 March 2011

Firstpage

1

Lastpage

4

Abstract

Micronized coal reburning is one of the most effective de-NO_X technologies for its high NO_X reduction efficiency and low operating cost. By numerical simulation and experimental study, NO_X reduction efficiency influenced by the temperature and stoichiometric ratio in rich zone, the velocity and the particle size of reburning fuel during the coal reburning process in a one dimension furnace has been investigated. The results indicate that the optimum temperature and stoichiometric ratio in rich zone is about 1200°C and 0.9 respectively. NO_X reduction efficiency will increase with the velocity of reburning fuel increased and particle size decreased. The optimum particle size of reburning fuel is 20μm. Compared with conventional coal reburning, micronized coal reburning is superior not only because it has less influence on combustion efficiency but also for its higher NO_X reduction efficiency.

Keywords

coal; coal gasification; combustion; NOX reduction efficiency; micronized coal reburning; optimum particle size; reburning fuel; Biological system modeling; Coal; Combustion; Mathematical model; Nitrogen; Numerical models;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific

Conference_Location

Wuhan

ISSN

2157-4839

Print_ISBN

978-1-4244-6253-7

Type

conf

DOI

10.1109/APPEEC.2011.5748499

Filename

5748499