Air-to-coal Weighted Ratio Optimization Concerning the Flow of Sealing Air

The significance of primary air is widely recognized in fossil fuel conveyor system as predominant power resources. Engineering applications have shown that the primary air may behave as a medium of fuel delivery and combustion. Regular combustion is decided to great extent by a proper air-to-coal weighted ratio. However, little is known about currently employment on sealing air related to the air-to-coal weighted ratio. Moreover, although it has also not yet been effectively detected via field instruments, the sealing air herein has sought to play a part in the process of fuel ignition. In this study, we attempt to conduct the primary air calibration, concerning the air-to-coal curve correction-benefits from the sealing air. Fortunately, it was found that the relative allowance of outlet air velocity registered a 10.8 percent decrease, featured by a minimum air velocity of 18.24 m/s. Our results indicate that the correction of the air-to-coal curve may be controlled by using entrained sealing air with a satisfying efficiency of pulverized mills.