No abstract

The gas-solid two phase flow was formed in the catalyst conveying pipeline with the catalyst particles coming from the top of the inclined pipes and air blowing from one side of the horizontal feed pipe. The upper side of horizontal pipe was seriously eroded. The erosion situation of feed pipe was simulated by the Discrete Phase Model (DPM) in Fluent software. The simulation result was compared with the field pipeline, and the gullies on the upper side of the horizontal pipe were formed by the particles concentrating on the upper side of the horizontal pipe with the excessive gas phase velocity. The reasonable distribution method of velocity was put forward by grouping numerical simulation of different particle velocities and blowing velocities. The particles were remained in the intermediate position of the horizontal pipe to reduce the collision between particles and the pipe wall. Therefore, the erosion rate of the pipe was slowed down; in addition, the service life of pipeline was prolonged. The research results of this paper could be used to provide reasonable feed speed for the actual petrochemical feed pipe. The protection methods was put forward for the horizontal feed pipe. The safety of petrochemical enterprises were guaranteed.