Study on High Temperature Air Combustion of Hot Blast Stove

Abstract:

NO_x is the major technical barrier to increase hot blast temperature and prolong campaign life of hot blast stove (HBS) at present. In order to restrain the amount of NO_x formation during combustion process in the HBS, the paper studies and analyses the generation mechanism of NO_x production, and calculates NO_x generation rate and amount in HBS by means of thermodynamic generation model. A new dome combustion stove is developed based on high temperature air combustion (HTAC) technology. A comparison on the combustion process and characteristic of conventional HBS and HTAC HBS is performed by application of CFD numerical simulation model. Temperature and concentration field distribution, flame shape and NO_x concentration distribution of two kinds of stove are calculated. The result shows quite symmetrical HTAC stove temperature field distribution. Under the same dome temperature, NO_x generation is 80ppm only, reduced by approximate 76% in comparison with conventional stove. HTAC HBS can obtain higher temperature, energy-saving, emission-reducing, and decrease NO_x emission efficiently, as well as realize long campaign life of HBS.

• Periodical: Advanced Materials Research (Volumes 875-877)
• Pages: 715-719
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.875-877.715
• Online since: February 2014
• Authors: Fu Ming Zhang, Zu Rui Hu, Shu Sen Cheng
• Keywords: Dome Combustion Hot Blast Stove, High Hot Blast Temperature, High-Temperature Air Combustion (HTAC), Low NO_x

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