INVESTIGATION OF GAS SWIRL BURNER CHARACTERISTIC ON BIOMASS GASIFICATION SYSTEM USING COMBUSTION UNIT EQUIPMENT (CUE)
Keywords:
Gasification, low swirl gas burner, computational fluid dynamics (CFD)Abstract
Swirling flow burners have been essential to both premixed and non-premixed combustion system because of their significant beneficial influences on flame stability, combustion intensity and combustor performance. This research explores the flame characteristics of the low-swirl burners, especially using low calorific gas produced by biomass gasification system. One of the problems during burning of the mixed gas is the poor distribution of heat released in the chamber. Therefore, to increase the flame quality, or flame strength, it is necessary to reduce the diameter of the inlet fuel with variation of 6, 8 and 10 blades of the swirler vanes, with the vanes inclined at 30 degrees from the horizontal axis. Variations of vane design are correlated with quality of the flame, heat release rate and emissions formation in combustion unit. The methodology used includes implementation of three-dimensional (3D) Computational Fluid Dynamics (CFD) simulation using the commercial software FLUENT and gasification experiments which included assembly of a new combustion equipment unit. The experimental results identified the maximum temperature, which occurred at swirl vane of 8 blades at 795OC. The maximum heat release was achieved at 11.15 kJ/s for biomass. The lowest content of CO emission was 0.02% volume of biomass the lowest NOx emission was the 1108 ppm for biomass. Results of this study indicate that swirl vanes with 8 blades and diameter of 55 mm perform better than other number of blades of swirl vane burners.References
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