错流碟片式旋转超重力场强化氨水吸收燃煤烟气中CO_2的研究

Study of scrubbing CO_2 from flue gas with aqueous ammonia intensified by rotating cross-flow disks packed bed

通过条件简化和理论分析建立了错流碟片式超重力场强化氨水脱除CO2的传质-反应动力学数学模型,在具体的工况条件下进行了实验测试并和模型计算数值相比较.本研究实验条件:浓度15%的氨水按流量为0.6 L/min,在碟片式旋转超重力场中与浓度为12%、体积流量为0.4 m3/min的CO2进行反应.实验结果表明,在低转速区域内模型计算值与实验测试值变化趋势基本一致,增加旋转床转速、碟片开孔数和碟片数可有效提高CO2的脱除率,当旋转床转速为900 r/min左右、碟片数16片、每片开孔数在96个左右时效果最佳.

In terms of simplifing condition, the mass transfer-reaction kinetics process of removing CO2 with aqueous ammonia intensified by rotating cross-flow disks packed bed was analysised theoretically, and the experimental test was also compared with the model evaluation under concrete operating condition. The model computation and the experimental results indicated that the remove ratio of CO2 can be effectively enhanced as rotation speed, num- ber holes and number disks were increased. The change tendency of model computation and experimental test value is basically consistent in the slow-speed rotation region. The experimental study as CO2 concentration is 12% and flow rate is 0. 4 m3/min was removed by aqueous ammonia which its concentration is 15% and flow rate is 0. 6 L/min in rotating packed bed , indicates rotation speed is about 900 r/min, number disks are 16 and holes （Φ16 mm） number in each disks are 96 or so.