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

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 iso...

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Bibliographic Details
Published in2010 Asia-Pacific Power and Energy Engineering Conference pp. 1 - 4
Main Authors Jinfeng Ma, Jingxing Wu, Wei Wang, Shuqun Wang, Youning Xu, Jitang Liu
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2010
Subjects
Air pollution
Boilers
Combustion
Flue gases
Heat transfer
Numerical simulation
Pollution measurement
Power generation
Scattering
Temperature
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Summary: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.
ISBN:1424448123
9781424448128
ISSN:2157-4839
DOI:10.1109/APPEEC.2010.5449501