화학공학소재연구정보센터
Korean Journal of Chemical Engineering, Vol.26, No.5, 1399-1404, September, 2009
Prevention of bed agglomeration with iron oxide during fluidized bed incineration of refuse-derived fuels
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The present study was performed to evaluate the effect of iron oxide addition on the prevention of bed agglomeration during the fluidized bed incineration of refuse-derived fuels (RDFs) having different alkali contents. To investigate the extent of bed agglomeration as a function of the Fe2O3/(K2O+Na2O) molar ratio, a simulation was performed by using a thermodynamic equilibrium model. Based on this simulation, potassium (K) component exhibited a much higher affinity for iron (Fe) component than for silicon (Si) component, and the extent of agglomeration was remarkably reduced. Therefore, a small amount of iron oxide added to the bed effectively reduced the extent of bed agglomeration in the fluidized bed incineration process. Furthermore, the extent of agglomeration decreased as the molar ratio of Fe2O3/(K2O+Na2O) increased until unity was attained. In excess Fe2O3, no potassium silicate melts existed in the products, while the amount of sodium silicate melts remained constant.
  1. Zevenhoven-Onderwater M, Blomquist JP, Skrifvars BJ, Backman R, Hupa M, Fuel, 79, 1353 (2000)
  2. Zevenhoven-Onderwater M, Backman R, Skrifvars BJ, Hupa M, Liliendahl T, Rosen C, Sjostrom K, Engvall K, Hallgren A, Fuel, 80, 1503 (2001)
  3. Tangsathitkulchai C, Tangsathitkulchai M, Fuel Process. Technol., 72(3), 163 (2001)
  4. Grubor BD, Oka SN, Ilic MS, Dakic DV, Arsic BT, Biomass FBC combustion-bed agglomeration problems, Proceedings of the 13th International Conference on Fluidized Bed Combustion, 515, Orlando, Florida (1995)
  5. Linjewile TM, Manzoori AR, Role of additives in controlling agglomeration and defluidization during fluidised bed combustion of high-sodium, high-sulphur low-rank coal, Engineering Foundation Conference on mineral matter in fuels; Impact of mineral impurities in solid fuel combustion, 319, New York (1999)
  6. Vuthaluru HB, Zhang DK, Fuel Process. Technol., 60(2), 145 (1999)
  7. Lee JK, Gu JH, Kim MR, Chun HS, J. Chem. Eng. Jpn., 34(2), 171 (2001)
  8. Outokumpu Research Oy Information Service, Outokumpu HSC chemistry for windows version 5.1, ISBN 952-9507-08-9, Pori, Finland (2002)
  9. Shores DA, Mohanty BP, Corros. Sci., 46, 2909 (2004)
  10. Adam C, Peplinski B, Michaelis M, Kley G, Simon FG, Waste Manag., 29, 1122 (2009)
  11. Kim MR, Jang JG, Yoa SJ, Kim IK, Lee JK, J. Chem. Eng. Jpn., 38(11), 883 (2005)
  12. Kim MR, Kim KH, Jang JG, Lee JK, J. Chemical Eng. Japan, 41, 721 (2008)
  13. Kouvo P, Backman R, Fuel, 82, 741 (2003)
  14. Werther J, Saenger M, Hartge EU, Ogada T, Siagi Z, Prog. Energy Combust. Sci., 26(1), 1 (2000)
  15. Barin I, Thermochemical data of pure substances, Part I, Wiley-VCH Verlags, Weinheim, Germany (1993)
  16. Covey GH, Algar, UK Patent Application, 6B 2019370A (1978)