Hydraulic Transport of Solid Material in Pipes

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Abstract
The growing interest in the hydraulic conveying of solid material in pipes has brought to light the lack of data for the design of these systems. To meet this need extensive research work has been undertaken both in Britain and overseas and the more important results are summarized. The flow of mixtures in horizontal pipes is a complex phenomenon not very amenable to theoretical study. It has been found possible to correlate data obtained over a fairly wide range of conditions and the flow in vertical and sloping pipes is also mentioned. The passage of solids through machines and pipes leads to breakage of the particles and wear of the metal parts. Some test results and conjectures on this are given. Because high pressures are required for long-distance hydraulic transport or for vertical lifting through pipes, the practical problems of pumping solids are severe. These are discussed with special reference to coal-feeding devices.

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