Experimental Study on Low NOx Emission Using Blast Furnace Gas Reburning and Industrial Application in Stoker Boiler

Author

Zhou Tuo ; Zhang Zhong-xiao ; Wu Xiao-jiang

Author_Institution

Univ. of Shanghai for Sci. & Technol., Shanghai, China

fYear

2011

fDate

5-7 Aug. 2011

Firstpage

523

Lastpage

526

Abstract

To get the modification method of blast furnace gas reburning technology on one 75t/h stoker boiler, the effect of some key factors such as stoichiometric coefficient, residence time, temperature and heat ratio input on NOx formation regulation was studied on a one-dimensional test system with fuel reburning. The results showed that prolonging the reburn zone residence time can help to lower the NOx emission and the best time was 0.8s. There existed an optimum value 1.0 for reburn zone stoichiometric coefficient. The NOx reduction efficient increased with the increase of the reburn heat input and the reburn zone temperature. The use of blast furnace gas reburning technology has been successfully implemented during the modification of stoker boiler, the NOx reduction rate was over 50%.

Keywords

air pollution; blast furnaces; boilers; combustion; emission; nitrogen compounds; stoichiometry; NO_x; blast furnace gas reburning technology; fuel reburning; industrial application; low nitrogen oxide emission; nitrogen oxide formation regulation; stoichiometric coefficient; stoker boiler; Blast furnaces; Boilers; Coal; Combustion; Blast furnace gas; NOx reduction; Reburn; Stoker boiler;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Manufacturing and Automation (ICDMA), 2011 Second International Conference on

Conference_Location

Zhangjiajie, Hunan

Print_ISBN

978-1-4577-0755-1

Electronic_ISBN

978-0-7695-4455-7

Type

conf

DOI

10.1109/ICDMA.2011.132

Filename

6051967