The results of flow experiments for several kinds of ash are presented. The experiments were carried out on the two laboratory stands at the Institute of Environmental Engineering, Agricultural University of Wroclaw. The pressure drop, limit deposit velocity, mixture density distribution in a cross-section of pipeline and pump characteristics are measured during these experiments. The measurements of density distribution were carried out by means of a device based on radiometric scanning, which enables us to determine these parameters without causing disturbances in the flow. The problem of limit concentration between Newtonian and non-Newtonian behaviour of mixtures is also discussed. The results of investigations into parameters of hydrotransport of ash and brine mixture in pipelines (80 and 100 mm) are presented. The investigations were carried out on the test laboratory installation at the Silesian Technical University of Gliwice.
In the article the impact of the structure of pipeline transportation systems on the efficiency of their operation is examined. It is shown that, depending on the assumed structure, transport systems can be characterized by different performance characteristics. It is established that the structure of the system influences the development of the aging process and decrease system performance. Recommendations on the choice of the structure of systems that can be used at the design stage are given.