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http://dx.doi.org/10.7842/kigas.2019.23.5.24

Comparison of Combustion Characteristics With and Without Water Tube Simulating Heat Exchanger in Two Sections Porous Media Burner  

Lee, Hui-Do (Department of Aerospace Engineering, Sunchon National University)
Kim, Jae-Hyeon (Department of Aerospace Engineering, Sunchon National University)
Lee, Kee-Man (School of Mechanical and Aerospace Engineering, Sunchon National University)
Publication Information
Journal of the Korean Institute of Gas / v.23, no.5, 2019 , pp. 24-34 More about this Journal
Abstract
In this study, the experimental studies were conducted to analyzing characteristics of combustion and flame stabilizing according to with and without water tube in boiler. The burner has consisted of SiC foam where has the location of submerged flame between a ceramic board acting as flash-back arrestor. Porous burner is also insulated to minimize heat loss in the radial direction. In the condition of fixed equivalence ratio, the flame mode was divided into three stability zones by the flow rate. The main factor for blow-off and flash-back depends on mixture flow rate. Consequently, the case of burner with water-tube has higher NOx emissions than without case. This result explains that the presence of water-tube makes the heat loss resistant to ambient temperature with increasing of NOx. This tendency was proved by predicting the relationship between O2 emission and NO production rate, and by analysing temperature profiles.
Keywords
porous burner; SiC foam; submerged flame; industrial boiler; water-tube; emission;
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