Numerical simulation of coal powder distribution along the air-coal mixture channel influenced by various shutter angles

• Autorzy: Zivkovic N. , Stefanovic P. , Zivkovic G. , Cvetinovic D.
• Konferencja: Mechanics 2006 / International Scientific Conference (V; 2006; Rzeszow, Poland)
• Języki publikacji: EN

Abstrakty

EN

For implementation of the plasma system for mineral oil free combustion support and start-up on power plant boilers few technical problems have be to solved. One of the key requirements in the implementation process is a regulation of coal powder distibution in the mixture channel in order to achieve adequate concentration in the zone where plasma has to be introduced. Regulation of powder distribution with shutters, positioned in the vertical section of the channel after the mills and prior to plasma generators is proposed solution. The paper represents numerical simulation of this problem using numerical software for modelling of two-phase flow problems, developed in Laboratory of Thermal Engineering and Energy. The model is based on Euler-Lagrangian approach. Continual phase was treated by Euleiran and disperse phase was treated Lagrangian approach. For turbulence modelling a well known k-!!! model was used. The computation results were obtained for three combinations of shutter system positions. The input data were velocity profile of continual phase and concentration profile of disperse phase in the inlet cross section, obtained by experiments. On the basis of the presented results it can be concluded that the positions of groups of shutters has a great influence on flow and concentration field in the burner channels, therefore it should be properly adopted as an adequate regulation method.

Słowa kluczowe

EN

coal powder; numerical simulation

PL

pył węglowy; symulacja numeryczna

• Wydawca: Oficyna Wydawnicza Politechniki Rzeszowskiej
• Czasopismo: Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
• Rocznik: 2006
• Tom: z. 68 [231]
• Strony: 261--268
• Opis fizyczny: Bibliogr. 9 poz., tab., rys., wykr.

Twórcy

autor

Zivkovic N.

autor

Stefanovic P.

autor

Zivkovic G.

autor

Cvetinovic D.

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

Bibliografia

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• 2. Lee S.L., Durst F.: On the motion of particles in turbulent duct flows. Int. J. Multiphase Flow 8/1982, pp. 125-146.
• 3. Matsumoto S., Saito S.: Monte Carlo simulation of horizontal pneumatic conveying based on the rough wall model. J. Chem. Engng. Japan 3/1970, pp. 223-230.
• 4. Pavlović P., Stefanović P. et all.: Application of plasma generators for black mineral oil free boiler kindling on the power plant 210 MW "Nikola Tesla". Technical solution, NIV-ITE-155, 1999. Belgrade-Vinča, (In Serbian).
• 5. Sommerfeld M., Živkovic 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, 1992. Brussels, pp. 201-212.
• 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., Živković N., Stefanović P.: Numerical simulation of coal powder distribution for the system for flame support on the power plant boiler using low temperature plasma. Proc. of 11 Symposium Society of Thermal Engineers of Serbia and Montenegro, 1.-4. October, 2003, Zlatibor, (In Serbian).
• 8. Živković G.: Mathematical Modelling of Two-Phase Gas-Particle Flow in Horizontal Tubes and Channels. PhD thesis, University of Belgrade, 2003, Serbia.
• 9. Živković N., Živković G., Stefanović P.: Numerical simulation regulation of distribution of coal powder in air-mixture channel with shutters on thermal power plant 210 MW TENT. A, Society of Thermal Engineers of Serbia and Montenegro Symposium with International participation, Power plants 2004, Vrnjačka Banja. (In Serbian).