【摘要】 超重场可显著提高气液两相的传质系数,通过实验研究了错流旋转碟片超重床结构对燃煤锅炉烟气中CO2脱除率的影响;增加旋转床碟片数和开孔数能有效提高CO2的脱除率,但随碟片数和开孔数进一步增加,CO2脱除率反而有所降低;增加碟片转速和氨水初始质量分数也能提高CO2脱除率,但若转速过大,液体的甩出速度增大,反应停留时间变小,CO2脱除率也会有所降低。由本研究实验可知,结构合适的旋转碟片超重床反应器可有效脱除烟气中的CO2。更多还原

【Abstract】 Super-gravity bed is able to improve mass transport coefficient between liquid and gas phase greatly.With an experiment the influence was studied of the structure of super-gravity bed with current-flow disks on removing CO₂ in flue gas.The increase of the disks and holes number will promote the removing efficiency of CO₂.However the removing rate of CO₂ will decrease when the number of disks and holes surpasses a certain critical point.On the other hand,the increase of disk rotating speed and the initial concentration of aqueous ammonia is also to promote the removing efficiency of CO₂,but the removing rate will decrease when the rotating speed is too fast because the resident time for reaction is reduced.The experiment shows that optimum structure of super-gravity bed with disks will scrub CO₂ in flue gas effectually.更多还原