气升式环流反应器内气液固三相流的数值模拟
发布时间：2018-12-10 09:16
【摘要】：以Fluent中的欧拉三相流模型为基础,采用改进的曳力模型对连续式三相气升式内环流生物反应器进行二维非稳态数值模拟,模拟反应器降流区时均液体循环速度和最大液体循环速度,不同曝气量和石英砂含量下的气含率及曝气量10.2 L/min、石英砂含量2 L时苯酚在反应器内的扩散过程.结果表明,模拟结果与实测值吻合较好.用该模型模拟固相密度为1200,1500,1 800,2 220 kg/m~3、固相颗粒粒径为0.3,0.6,0.9 mm条件下降流区的时均液体循环速度,较小的密度和粒径有助于提高液体循环速度.
[Abstract]:Based on the Euler three-phase flow model in Fluent, an improved drag model is used to simulate the two-dimensional unsteady state of the continuous three-phase airlift internal circulation bioreactor. The average liquid circulation velocity and maximum liquid circulation velocity, the gas holdup and aeration rate of 10.2 L / min at different aeration rate and quartz sand content, and the diffusion process of phenol in the reactor with 2 L quartz sand content were simulated. The results show that the simulation results are in good agreement with the measured values. The model was used to simulate the time-averaged liquid circulation velocity in the descending flow region with solid density of 1 200 ~ 1 500 ~ 1 800 ~ 2 220 kg/m~3, and the particle size of 0. 3 ~ 0. 6 ~ 0. 9 mm. A small density and particle size are helpful to increase the liquid circulation velocity.
【作者单位】： 湖南大学土木工程学院;中国地质工程集团公司;
【基金】：国家水体污染控制与治理科技重大专项(编号:2009ZX07423-004)
【分类号】：TQ052.5
，
本文编号：2370338
[Abstract]:Based on the Euler three-phase flow model in Fluent, an improved drag model is used to simulate the two-dimensional unsteady state of the continuous three-phase airlift internal circulation bioreactor. The average liquid circulation velocity and maximum liquid circulation velocity, the gas holdup and aeration rate of 10.2 L / min at different aeration rate and quartz sand content, and the diffusion process of phenol in the reactor with 2 L quartz sand content were simulated. The results show that the simulation results are in good agreement with the measured values. The model was used to simulate the time-averaged liquid circulation velocity in the descending flow region with solid density of 1 200 ~ 1 500 ~ 1 800 ~ 2 220 kg/m~3, and the particle size of 0. 3 ~ 0. 6 ~ 0. 9 mm. A small density and particle size are helpful to increase the liquid circulation velocity.
【作者单位】： 湖南大学土木工程学院;中国地质工程集团公司;
【基金】：国家水体污染控制与治理科技重大专项(编号:2009ZX07423-004)
【分类号】：TQ052.5
，
本文编号：2370338
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