Design of a model pulverized coal combustion system
Keywords:
Design, hopper, screw conveyor, blower, electric motor, bearings, pulley, belt, gear, combustion chamberAbstract
The design of a model pulverized coal combustion system is undertaken. The system consists of a hopper, screw conveyor, blower, electric motor, among others. The design of the system focused on the following procedures in this work: The outlet of the pulverized coal from the silo opens directly into the receiving hopper of the screw conveyor. The drive of the blower is connected to the drive of the screw conveyor via bearings, pulleys, belt and gears. This means that one electric motor drives both the blower impeller and the screw conveyor shaft. The outlet of the conveyor is connected to the blower outlet hole so that the air from the blower meets the incoming pulverized coal. The air then sprays the pulverized coal into the already heated combustion chamber. The combustion chamber is heated initially with a pilot flame from burning wood so that the temperature of the chamber is elevated so as to make it easy for the pulverized particles of coal to ignite easily in the chamber. Once the combustion of the pulverized coal has started, the pilot flame can be withdrawn, combustion of the coal then continues until the content of the silo is finished. The ash formed during combustion of coal goes out through the ash exit outlet.
References
James, A. K, (1971). Riegel’s Hand book of industrial chemistry 7th edition New York: Van Nostrand Reinhold Co.
Johnson, A.J., & Auth, G.H. ed, (1951). Fuels and combustion Handbook. New York: Mc Graw-Hill.
Johnson, A.J., & Auth, C. H. (1951). Fuels and combustion Handbook. New York: McGrawHill.
Kenneth, W. W., & Kenneth, D. C. (1981). General chemistry with qualitative analysis: CBS college publishing. McCraw-Hill. .
Metcalfo, F: (1974). Heat engine and applied heat. 5th ed. Gassol London.
National Coal Association, (1979). Coal facts. Washington: National coal Association,
National Research Council (1963). Committee on chemistry of coal - chemistry of coal utilization supplementary volume, ed. By H.H. Lowing. New York: John Wiley.
Rafael, E. (2006). TEKNIKER, Production Engineering Department Otaola 20, E-20600 Eibar, spain renparantza@tekniker.es722,2006.
Richardo, A. M. (1980). The use of coal in cement kilns and its effect on Refractory linings magnesia S. A page 11
Roggers, G.F.C., & Mayhew, Y.R. (1980). Engineering thermodynamics work and heat transfer, 3rd ed: English language Book society and Longman group limited
Roy, F. A., & Elsie, M. C. (1961). Free swelling and grindability Indexes of Unites State coals. US Bureau of mines, information circular 8025. Washington: US. Bureau of mines.
Samuel, A. A. (2009). Design, construction and Testing of an improve wood stove. Department of Mechanical Engineering, FUTM, Nigeria
Trinks, W., & Mawhinney, M.H. ( 1967). Industrial Furnaces. 4th ed. Vol. II:John wiley and Sons Inc. New York.
Walters, H. D. (1985). Cement data Book, An international process Engineering in cement Industry. Mackdonald and Evans London, 2nd ed.
William, K. (2010). Classification and Heat value of American coals. Transactions of the ASME, 3rd. 189-209-1014. www.gradko.co.uk.
Yunus, A. C. (2008). Thermodynamics, an Engineering approach.
http://www.researchgate.net/publication/228632481/9/23/2013/7:1 8pm
Illinois University of Urbana — champaone. (1928). Engineering Experiment station Bulletin series no. 180, “The classification of coal,” by S.W. parr,
International civil aviation organization report (ICAO) No. 1235. (1952). Standard atmosphere tables and data for attitudes to 65,800 feet, montreal Canada and lang by Aeronautical laboratory langloy field, V.A.