Title :
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
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; NOx; bin-feeder coal pulverizing system; bituminous boiler; flue gas extraction; isotropic scattering media; lignite-blended burning technology; low-NOx 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;
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
DOI :
10.1109/APPEEC.2010.5449501
