在气力输送弯管中炭黑的输送特性分析

Analysis of Transportation Characteristics of Carbon Black in Pneumatic Conveying Elbow

研究炭黑(固相颗粒)在气力输送通过弯管时,弯径比(δ)对输送弯管内压力损失和固相颗粒运动速度以及弯管内壁磨损的影响。当δ小于5时,随着δ的增大,输送弯管内压力损失减小和固相颗粒运动速度增大,弯管内壁磨损程度降低;当δ增大到5后,输送弯管内压力损失和固相颗粒运动速度以及弯管内壁磨损速率变化放缓。设计炭黑气力输送弯管时,δ在5~7范围内既可以使输送弯管内壁磨损程度和输送能耗降低,又可满足输送管道布局和工艺要求。

The influence of the bending diameter ratio(δ)on the pressure loss and the moving speed of solid particles in the conveying elbow and the wear of the elbow inner wall when carbon black(solid particles)was pneumatically conveyed through the elbow was studied.Whenδwas less than 5,asδincreased,the pressure loss in the conveying elbow decreased,the moving speed of solid particles increased,and the wear degree of the elbow inner wall was reduced.Whenδincreased to above 5,the change of the pressure loss and the moving speed of soild particles in the conveying elbow and the wear rate of the elbow inner wall slowed down.When designing the carbon black pneumatic conveying elbow,δin the range of 5~7 could reduce the abrasion degree of the conveying elbow inner wall and the energy consumption of the conveying,and it could also meet the layout and process requirements of the conveying pipeline.