Coal powder fractions distribution in thermal power plant mixture channel presented by numerical calculations

• Autorzy: Zivkovic N. , Stefanovic P. , Cvetinovic D.
• Konferencja: Mechanics 2008 / International Scientific Conference (VI; 2008; Rzeszow, Poland)
• Języki publikacji: EN

Abstrakty

EN

One of the problems during exploalation period of thermal power plant is in determine and optimize distribution of various coal powder fractions in the mixture channel. Regulation of distribution with shutters, positioned after the mills, is proposed solution. The paper present distribution of coal powder fractions, obtained by numerical calculations, using numerical software for modelling of two-phase flow problems. The problem is two-dimensional, considering that, transversal dimension of the domain is relatively big compared with the other two dimensions, and volume occupied by solid phase is much less than volume occupied by continual phase. Continual phase is treated by an Eulerian approach, and solid phase is modeled by Lagrangian approach. The model takes in consideration coupling of phases by PSI-CELL method. Turbulence was modeled with standard k-ε model. The model treats particles as an ideal sphere. In order to determine particle movement, all relevant forces, (with continual affect and impulse affect), are incorporated in the model. The results obtained, include velocity field and profiles of continual phase, concentration field and profiles of coal particles and mass flow distribution at the outlet cross section of mixture channel for various coal particle diameters and various angular positions of shutters.

Słowa kluczowe

EN

coal powder; thermal power plant; power plant; PSI-CELL method; numerical calculations

PL

pył węglowy; elektrownia; metoda PSI-CELL; obliczenia numeryczne

• Wydawca: Oficyna Wydawnicza Politechniki Rzeszowskiej
• Czasopismo: Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
• Rocznik: 2008
• Tom: z. 73 [253]
• Strony: 311--318
• Opis fizyczny: Bibliogr. 7 poz., tab., rys., wykr.

Twórcy

autor

Zivkovic N.

autor

Stefanovic P.

autor

Cvetinovic D.

• Institute of Nuclear Sciences "Vinca", Belgrade, Serbia

Bibliografia

• 1. Crowe C.T., Sharma M.P., Stock D.E.: The Particle-Source-in-Cell (PSI-CELL) model for gas-droplet flows. J. Fluids Eng. 99, 325-332, 1977.
• 2. Lee S.L., Durst F.: On the motion of particles in turbulent duct flows. Int. J. Multiphase Flow 8, 125-146, 1982.
• 3. Matsumoto S., Saito S.: Monte Carlo simulation of horizontal pneumatic conveying based on the rough wall model. J. Chem. Engng. Japan 3, 223-230, 1970.
• 4. Pavlović P., Stefanović P., et al.: Application of plasma generators for black mineral oil free boiler kindling on the power plant 210 MW "Nikola Tesla". Technical solution, NIV-ITE-155. Belgrade-Vinča, 1999, (In Serbian).
• 5. Sommerfeld M., Živković G.: Recent advances in the numerical simulation of pneumatic conveying through pipe systems, Computational Methods in Applied Science, Invited Lectures and Special Technological Sessions of the First European Computational Fluid Dynamics Conference, Brussels, 201-212, 1992.
• 6. Stefanović P., Pavlović P.. Cvetinović D., Živković N., Pavlović Z., Marković Z.: Plasma systems for start-up and flame support on power plant boilers fired with coal powder - review of implemented industrial plants in the world. Processing Technology, Vol 1, Year 19, March 2003, Belgrade, (In Serbian).
• 7. Živković G.: Mathematical Modelling of Two-Phase Gas-Particle Flow in Horizontal Tubes and Channels. PhD Dissertation, University of Belgrade, 1996.