Drying Characteristics of Green Pellets Under Hydrogen-Rich Fuel Conditions
摘要
Due to the combustion of H2, more water vapor would be generated during the hydrogenHydrogen-rich fuel roastingRoasting, which affects the dryingDrying of green pelletsGreen pellets. The drying characteristicsDrying characteristics of green pelletsGreen pellets were investigated by simulating hydrogenHydrogen-rich conditions with different water vapor contents in this study. The results showed that the water vapor produced during roastingRoasting was 1.5 to 4 times higher than that of conventional fuels when using H2 as fuel. The water vapor concentration in the flue gas of rotary kilnsRotary kilns can be 5% to 10%. The water vapor in the dryingDrying flue gas would slow down the dryingDrying rate of the green pelletsGreen pellets. The water vapor content of the dryingDrying hot air should be matched to the temperatureTemperature and pelletPellet moistureMoisture under hydrogenHydrogen-rich operating conditions. When the moistureMoisture of green pelletsGreen pellets was 8.0%, the water vapor content was 10%, and the dehydration rate of green pelletsGreen pellets could reach more than 97% after dryingDrying at 300 ℃ for 8 min.