流化床气化炉内煤颗粒的升温过程及影响

根据热传递理论,对夹套高温烟气加热的流化床气化炉内煤颗粒的升温过程进行了分析与计算,结果表明,颗粒的总体升温速率越高,颗粒升至床温所需的时间就越少;提高流化速度,有利于颗粒的升温,但是影响较小;颗粒粒径对颗粒的升温影响很大,随着颗粒粒径的减小,煤颗粒达到床温所需时间急剧下降。当粒径小于1mm,床温为700～1100℃时,颗粒内部能够在1s左右达到等温,3～5s后颗粒温度能升至99%床温。

Temperature rise process of coal particle in a fluidized bed gasifier and its influence

Based on heat transfer theory,the analysis and calculation of the temperature rise process of coal particle in fluidized bed gasifier heated with high temperature flue gas from jacket was made in this paper,the result showed that the higher the overall temperature rate of coal particle,the less the time required for particle raised up to bed temperature;To increase fluidizing velocity is beneficial to temperature rise of particle,but the influence is less;While particle size diameter has great influence on ...