Global and local characteristics of ash mixture flows

• Autorzy: Sobota J. , Plewa F.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

mining technology; density distribution; pipeline; mixture flow; ash; pump

• Wydawca: -
• Czasopismo: Electronic Journal of Polish Agricultural Universities. Series Environmental Development
• Rocznik: 2000
• Tom: 03
• Numer: 2
• Opis fizyczny: http://www.ejpau.media.pl/series/volume3/issue2/environment/art-01.html

Twórcy

autor

Sobota J.

• Agricultural University of Wroclaw, Pl.Grunwaldzki 24, 50-363 Wroclaw, Poland

autor

Plewa F.

Bibliografia

• Mysłek Z., Plewa F.: Investigation of Fly-Ash and Brine Mixture Flow in Pipeline, Conference “Hydromechanisation 7”, Varna, Bulgaria, 1991, (in Russian).
• O’Brien M.P., Folsom R.G.: The Transportation of sand in pipelines, University of California in Engineering, 3, 1937.
• Parzonka W., Kenchinton J.M., Charles M.E.: Hydrotransport of Solids in Horizontal Pipes: Effects of Solids Concentration and Particle Size on Deposit Velocity, C.J.Ch.E., 59, 1981.
• Przewłocki K. et al: A Radiometric Device for the Determination of Solids Concentration Distribution in a Pipeline, Conference “Hydrotransport 6, Cantenbury, UK, 1979.
• Sobota J.: Reometryczne badania mieszanin ciecz-cząstki stałe (Rheometric Investigations of Liquid-Solid Mixtures, Zeszyty Naukowe Akademii Rolniczej we Wrocławiu, Melioracja XXIX, 159, Wrocław 1986 (in Polish).
• Sobota J.: Hydraulics of Newtonian Mixtures in Pipelines, Ossolineum, 1998 (in Polish).
• Ting A.P., Laubbers R.H.: Viscosity of Suspensions of Spherical and Other Isodimensional Particles in Liquids, A.I.Ch.E. Journal, vol.3, No.1, 1957.
• Wiedenroth W.: Kritische Geschwindigkeiten beim Gemischtransport “fest/flussig” vergleichend betrachtet. Maschinenmarkt. 79, 1973.