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Some results of theoretical and experimental studies on slurry flows of coarse solid materials in vertical pipelines
Berman, V. ; Kril, S. ; Vlasák, Pavel
The paper presents the results of theoretical and experimental investigations of the pressure gradient for flow of a mixture of large solids particles and water in straight vertical pipelines. The mathematical model of vertical two-phase flow was developed. Based on the developed model and experimental data of the solid particles liquid and liquid relative velocity, the functional dependence of the pressure gradient on the corresponding parameters was derived. This method was generalized for hydraulic transport of a broad category of solid particles conveyed in water as a function of the average size and concentration. Comparisons of our computations with experimental data for the corresponding pressure gradients are also presented.
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Pipeline transport of fossile fuels
Vlasák, Pavel ; Berman, V. ; Chára, Zdeněk
The paper deals with hydraulic pipeline transport of fossil fuels. A general analysis of coal and heavy viscous oil pipelining systems is introduced and pipeline transport of concentrated coal-water slurry, coal-water fuel, coal pipelining in other than water carrier liquid (e.g. methanol) and capsule pipeline transport (coal-log pipelining) is described.
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Pumping in hydraulic capsule pipeline
Vlasák, Pavel ; Berman, V.
Capsules used in hydraulic pipeline (HCP) are solid bodies comparable in proportion with pipe diameter. Capsules cannot pass through ordinary pumps, special procedure and/or equipment has to be used for their injection and pumping. The first way is based on a bypass scheme. It's advantage is high efficiency and operational pressure. The second way is to use linear motors, the third is special jet pumps designed for HCP. Advantage of jet pumps is continuous movement of capsules and small demand on space. But only a lower efficiency and pressure increment can be reached. The jet pump may prove profitable for injection units or short HPC. The jet pump, designed for HCP are described.
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