In order to strengthen the combustion effect of alcohol-based fuel and reduce the emission of NOx,it optimizes the light oil burner and designs a cyclone and flue gas reflux device.The temperature distribution law of different swirl angles,the number of swirl blades and the width of reflux port and the emission of NOx concentration at the furnace outlet were studied by numerical simulation.The results show that when the swirl angle increases from 20°to 60°,the flame temperature decreases first and then increases.The NO concentration at the furnace outlet also decreases first and then increases.When the swirl angle is 40°,the area of local high temperature zone in the furnace is the smal-lest,and the emission of NO concentration at the furnace outlet is the lowest;When the number of swirl blades in-creases from 8 to 16,the flame fullness in the furnace gradually increases,and the temperature also in-creases,while the area of high temperature zone in the furnace decreases first and then increases,and the emission of NO concentration at its outlet also decreases first and then increases.When there are 12 swirl blades,the emission of NO concentration at its outlet is the lowest;When the width of the reflux port increases from 0 mm to 30 mm,the furnace temperature gradually decreases,the flame length also decreases,and the NO concentration emission at the outlet also decreases.When the reflux outlet is 30 mm,the emission of NO concentration at the furnace outlet is the least,which is 54%lower than that without re-flux.opening is 30mm,the NO concentration in the furnace is reduced by 70%compared to that without reflux.
burner optimization designswirl structureflue gas returnNOx concentrationnumerical simulation
万方数据
维普
