Abstract
Pneumatic conveying experiment of average particle diameter 0.25 mm sand is carried out using compress air at horizontal tee branch pipe. The result shows the change of conveying velocity and the flow valve opening of branch pipe has some noticeable effect on the respective and mutual resistance properties of branch pipe when the operation pressure keep to a constant value. When the conveying velocity is less and less, the pressure drop between the branch pipes decreases, at the same time, the respective unit length pressure drop declines at first, but when the conveying velocity reduces to some extent, the respective pressure drop begin to rise. With the difference value rising of the flow valve opening, it is found that the pressure drop curve of the respective branch pipe is away from each other and the pressure drop between the branch pipes increase.
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