Numerical simulation of buffer cylinder abrasion in coal gasification unit
Due to the presence of materials with high solid content in the coal gasification flash system,the problem of pipeline abrasion/erosion was more prominent,which seriously hindered the normal operation of the unit.Through geometric modeling and simulation analysis,flow characteristics of the fluid inside the buffer cylinder from the low-pressure flash tank to the angle valve of the vacuum flash tank were explored,and the severe abrasion/erosion areas were predicted.The research results indicated that the area with the most serious abrasion/erosion was located at intersection of the tee;as the inlet velocity increased,the maximum erosion rate accelerated exponentially and the abrasion/erosion area expanded continuously;low-speed vortex was generated in the blind end area of the buffer cylinder,which had a certain buffering effect on the erosion of the buffer cylinder wall;with the raise of inlet velocity,the height of the blind end buffer zone of the buffer cylinder slowly decreased,then buffering effect on the bottom of the blind end gradually weakened.
万方数据
维普
