WANG Xiaoning HU Shougen ZHAO Jun ZHENG Dan

WANG Xiaoning HU Shougen ZHAO Jun ZHENG Dan

(College of Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093 )

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.

Key words: Pneumatic conveying Branch pipe Resistance properties Flow valve opening

CLC No: TH232

上海市科学技术委员会基础研究重点(03JC14055)和上海市教育委员会(05EZ15)资助项目. Received 20051018, received in revised form 20060109