Study on Low-NOx Emission of Lignite-Blended Burning Technology in the Bin and Feeder Coal Pulverizing System

Author

Jinfeng Ma ; Wu, Jingxing ; Wang, Wei ; Wang, Shuqun ; Xu, Youning ; Liu, Jitang

Author_Institution

Shenyang Inst. of Eng., Shenyang, China

fYear

2010

fDate

28-31 March 2010

Firstpage

1

Lastpage

4

Abstract

A retrofit solution of mixing warm flue gas extracted from reversing chamber into the coal pulverizing system is provided so as to prevent the problems of the bituminous boiler caused by lignite blending in the bin and feeder coal pulverizing system. The radiant heat transfer with zone method in isotropic scattering media is established to simulate the temperature profile of the HG-670/140-9 boiler in Qing-He Electric Power Generation Co. Ltd. The numerical simulations show that the low-temperature combustion with blending lignite and recirculating warm flue gas can reduce the NOx emission. The measurement results show that, the mean reduction ratio of NOx emission is about 11%. It is an important technology to reduce pollutant emission with large ratio of lignite blended in the bituminous boiler with bin-feeder coal pulverizing system.

Keywords

air pollution control; boilers; coal; combustion; flue gases; heat transfer; nitrogen compounds; pulverised fuels; steam power stations; HG-670/140-9 boiler; NO_x; bin-feeder coal pulverizing system; bituminous boiler; flue gas extraction; isotropic scattering media; lignite-blended burning technology; low-NO_x emission; low-temperature combustion; numerical simulations; pollutant emission reduction; radiant heat transfer; reversing chamber; zone method; Air pollution; Boilers; Combustion; Flue gases; Heat transfer; Numerical simulation; Pollution measurement; Power generation; Scattering; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific

Conference_Location

Chengdu

Print_ISBN

978-1-4244-4812-8

Electronic_ISBN

978-1-4244-4813-5

Type

conf

DOI

10.1109/APPEEC.2010.5449501

Filename

5449501