论文部分内容阅读
The local flow characteristics in an external-loop airlift slurry reactor were investigated.The axial profiles of the local gas holdup,the Sauter mean diameter and the rise velocity were obtained.It was found that the bubble size and rise velocity were influenced by the solid holdup,and the bubble coalescence was enhanced by the increase of the solid holdup.A new correlation was used to predict the slip velocity between the gas phase and the slurry phase by taking into account the local gas holdup,the bubble size,and the physical properties of the experimental system.By using this correlation,the local drag coefficient can be calculated in the bubble swarm.
The local flow characteristics were in an external-loop airlift slurry reactor were investigated. The axial profiles of the local gas holdup, the Sauter mean diameter and the rise velocity were obtained. It was found that the bubble size and rise velocity were influenced by the solid holdup, and the bubble coalescence was enhanced by the increase of the solid holdup. A new correlation was used to predict the slip velocity between the gas phase and the slurry phase by taking into account the local gas holdup, the bubble size, and the physical properties of the experimental system.By using this correlation, the local drag coefficient can be calculated in the bubble swarm.