Experimental Study Of Desulfuration And Reducing NOx Emission In A Drop Tube Furnace

As people pay more attention to the environment protection issue, people know more about the SO2 and NOx created in the coal combustion, which threaten people s health and environment. So it is an important task that people control the emission of SO2 and NOx in the field of pulverized coal burning.At first, the technology of desulfuration and reducing NOx is summarized. And we do some experimental studies of the formation of SO2 and NOx for kinds of coals and blending coals in a tube furnace. The factors that influence the SO2 and NOx emission are studied, such as the furnace temperature, excess air factors, the temperature of the second wind, the ratio of the first wind, the second wind, and the quantity of coal powder etc. There are some benefits on selecting appropriate parameters of some boilers to control the SO2 and NOx emission.In the second, we study the formation of SO2 and NOx when we eject the limestone in the furnace on the base of these results. Especially we do some experiments on the change of the NOx when we eject the limestone. And we do some experiments on the formation disciplinarian of the desulfuration products in the course of coal combustion with the limestone desulfuration by changing different influential factors. In addition we assay the effect of the above technology on the furnace running.In the end, we do some experimental studies on reducing the NOx emission by the technology of coals reburning on the base of the foregoing, and discuss the effects on the reduction efficiency of the NOx emission by transforming different formative factors.