Performance prediction of riser termination devices using Barracuda Virtual Reactor

• Published in: Powder technology 2017-07, Vol.316, p.190-197
• Main Authors: Kodam, Madhusudhan, Freireich, Ben J., Pretz, Matthew T., Stears, Brien A.
• Format: Article
• Language: English
• Subjects: Barracuda; Catalysis; Catalysts; Cyclones; Devices; Elbow; Elbow (anatomy); Fluidized bed reactors; Fluidized beds; Particulates; Performance prediction; Reactors; Riser terminator; Studies
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2017.03.028

One of the locations in fluidized bed reactors where attrition is significant is the cyclones. One way to reduce the attrition in cyclones is to reduce the amount of catalyst going into the cyclones. This is achieved by separating the catalyst particles from the combined gas solid flow before the stream enters the cyclones. Using a riser flow along with a riser terminator, some of the catalyst particles can be separated from gas stream. In this work, we will discuss how Barracuda Virtual Reactor® has been used to investigate two riser termination devices for separating catalyst particles from gas phase. The two types of riser terminators simulated are (1) flat disk and (2) slots-elbow. The results indicate that the slots-elbow type terminator has an overall separation efficiency of more than 95% whereas the disk terminator has approximately 80% efficiency. Fig. 1 Particles colored by volume fractions in the two types of riser termination devices: (left) Disk terminator (right) Slots-elbow type terminator. [Display omitted] •Evaluated the separation efficiency of two types of riser termination devices used for circulating fluidized beds•Slot-elbow type riser terminator showed higher separation efficiency compared with disk-type of riser termination device•Erosion model was used to predict the locations of possible high wear