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2004 | Vol. 51, nr 4 | 371-385
Tytuł artykułu

The method of calculations of the sedimentation efficiency in tanks with lamella packets

Autorzy
Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The paper outlines a method to determine the sedimentation efficiency in modernized tanks with incorporated lamella packets. The method takes into account the properties of the suspension (density, viscosity, solid phase distribution and tank design parameters - flow intensity and settling surface). Several types of grain size distributions are considered: the log-normal distribution and generalised gamma distribution. The sedimentation efficiency is investigated in relation to the ratio of tank filling with lamella packets. The lamella ring width in a round Dorr clarifier is taken as an example. The analysis is performed by way of computer simulations. The applied calculation procedure was extensively verified in laboratory tests, pilot tests and industrial-scale tests (Kowalski 2000) and the obtained results were regarded as satisfactory. The error involved in calculations of the sedimentation efficiency is less than 0.05 when the efficiency value exceeds 0.8.
Wydawca

Rocznik
Strony
371-385
Opis fizyczny
Bibliogr. 23 poz., il.
Twórcy
  • AGH - University of Science and Technology, Cracow, Poland, Faculty of Mechanical Engineering and Robotics, al. Mickiewicza 30, 30-059 Kraków, wkowalsk@agh.edu.pl
Bibliografia
  • Bandrowski J., Merta H., Zioło J. (2001), Sedimentation of Suspension,Wyd. Politechniki Śląskiej, Gliwice (in Polish).
  • Boycott A. E. (1920), Sedimentation of Blood Corpuscles, Nature, 104, 532.
  • Camp T. R. (1946), Sedimentation and the Design of Settling Tanks, Trans. Amer. Soc. Civ. Engrs., 111, 895–958.
  • Gega J. (1976), High-Efficiency Pipe Lamella Settling Tanks to Purification of Metallurgy Sewage, Zesz. Nauk. AGH, 561, 9, 89–99 (in Polish).
  • Haba J., Nosowicz J., Pasiński A. (1978), Sedimentation of Suspension in Lamella Tank, Rudy Metale, 23, 9, 440–444 (in Polish).
  • Haba J., Nosowicz J., Pasiński A. (1980), Klären und Eindicken von Suspensionen in Lamelleneindickern, Aufbereitungs–Technik, 4, 198–201.
  • Haba J., Nosowicz J., Pasiński A. (1980), The Determination of Sedimentation Efficiency in Lamella Tank, Rap. Inst. Inz. Chem. i Urz. Ciepl. Polit. Wrocł., seria prepr., 91, Wrocław (in Polish),
  • Haba J., Pasiński A. (1979), The Investigations of Lamella Tank, Rap. Inst. Inz. Chem. i Urz. Ciepl. Polit. Wrocł., seria spr., 4, Wrocław (in Polish).
  • Hazen A. (1904), On Sedimentation, Trans. ASCE, 53, 45–88.
  • Kowalski W. (1991a), Mathematical Model of Sedimentation Process in the Bended Suspension Stream, Arch. Ochr. Srod. 1–2, 109–120 (in Polish).
  • Kowalski W. (1991b), Parameters of the Particles Composition of the Emitted Dust from Iron Metallurgy Processes, Arch. Ochr. Srod., 1–2, 67–79 (in Polish).
  • Kowalski W. (1991c), Sedimentation Balance – Interpretation Method of Information about Particle Composition, Arch. Ochr. Srod., 1–2, 159–167 (in Polish).
  • Kowalski W. (1992a), Generalization of Hazen’s Sedimentation Theory, Archives of Hydro-Engineering, Vol. XXXIX, 2, 85–103.
  • Kowalski W. P. (1992b), The Theoretical Bases of the Design Settling Tanks with Lamella Modules, Zeszyty Naukowe AGH, seria Mechanika, 27, Kraków, 132 s. (in Polish).
  • Kowalski W. P. (2000), The Theoretical Analysis of Lamella Sedimentation Processes, Problemy Inżynierii Mechanicznej i Robotyki, 3, Kraków, 179 s. (in Polish).
  • Kowalski W. P. (2004), The Mathematical Modeling of Polidysperse Grain Sedimentation, Mat. XLIII Sympozjonu pt. „Modelowanie w mechanice”, Gliwice (in Polish).
  • Marciniak-Kowalska J. (2003), Analysis of Grain Classification and Enrichment Processes in Lamella Classifiers, UWND AGH, seria Rozprawy i monografie, 120, Kraków (in Polish).
  • Nipl R. (1979), Application of Generalized Gamma Distribution in Approximation of Grain Size Composition,Mat. XIII Krak. Konf. Nauk.–Techn. Przeróbki Kopalin, Kraków, 323–330 (in Polish).
  • Oden S. (1916), Eine Neue Methode zur Bestimmung der K¨ornerverteilung in Suspensionen, Kolloid, Z., 18, 2, 33–47.
  • Olszewski W. (1975), Lamella Settling Tanks, Wodociagi i Kanalizacja, Vol. 5 (in Polish).
  • Papoulis A. (1972), Probability and Stochastic Processes. wyd. 1, WNT, Warszawa, (in Polish).
  • Stacy E.W. (1962), A Generalization of the Gamma Distribution, Annals of the Mathem. Statistics, Vol. 33, 3.
  • Stokes G. G. (1851), On the Effect of the Internal Friction of Fluids on the Motion of Pendulums, Camb. Trans., Vol. 9.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BAT3-0014-0025
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