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AXIAL MIXING OF RESIN BEADS IN A GAS-SOLID FLUIDIZED BED
Korean Journal of Chemical Engineering, October 1992, 9(4), 212-218(7), 10.1007/BF02705295
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Abstract
As a first stage of studies on the development of a fluidized bed incinerator for radioactive spent ion-exchange resins, the axial mixing characteristics of anion exchange resin beads and glass beads in a fluidized bed were investigated. The extent of axial solid mixing could be well characterized with a diffusion model and a global mixing index under various experimental conditions such as excess air velocities, size differences of particles and concentrations of resins. It was found that a certain extent of mixing of segregation was reached after 90 s. Axial diffusion coefficients are varing from 1 to 5㎠/s in this experimental ranges. The best conditions to incinerate anion resin beads with glass beads as bed materials in the gas-solid fluidized bed system, were 30wt% of resins in overall composition and excess air velocity over 8cm/s with glass beads having an averaged diameter of 320㎛.
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Long SW, "The Incinerator of Lower Level Radioactive Waste," NUREG-1393 (1990)
Rowe PN, Nienow AW, Agbim AJ, Trans. Inst. Chem. Eng., 50, 324 (1972)
Chiba S, Nienow AW, Chiba T, Kobayashi H, Powder Technol., 26, 1 (1980)
Michaels AS, Puzinauskas V, Chem. Eng. Prog., 50, 604 (1954)
Fan LT, Chang Y, Can. J. Chem. Eng., 57, 88 (1979)
Hemati M, Spieker K, Laguerie C, Alvarez R, Riera FA, Can. J. Chem. Eng., 68, 768 (1990)
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Brodsky RB, Hershey HC, "Transport Phenomena," McGraw, New York (1988)
Wwn CY, Fan LT, "Models for Flow Systems and Chemical Reactors," Marcel Dekker Inc., New York (1975)
Mickley HS, Sherwood K, Reed CE, "Applied Mathematics in Chemical Engineering," 2nd ed., McGraw-Hill, New York (1979)
Alkis C, "Applied Numerical Methods with Personal Computers," McGraw-Hill, New York (1988)
Gibilaro LG, Rowe PN, Chem. Eng. Sci., 29, 1403 (1974)
Bilbao R, Lezaun J, Menendez M, Izquierdo MT, Powder Technol., 68, 31 (1991)
Shrikhande KY, J. Sci. Ind. Res., 14b, 457 (1955)
Rowe PN, Nienow AW, Powder Technol., 15, 14 (1976)
Strijbos S, Powder Technol., 6, 337 (1972)
Nienow AW, Rowe PN, Chiba T, AIChE Symp. Ser., 74(176), 45 (1978)
Rowe PN, Nienow AW, Agbim AJ, Trans. Inst. Chem. Eng., 50, 310 (1972)
Kunii D, Yoshida K, Levenspiel O, Ind. Eng. Chem. Fundam., 8, 402 (1969)
Kunii D, Levenspiel O, "Fluidization Engineering," John Wiley, New York (1969)
Haines AK, King RP, AIChE J., 18, 591 (1972)
Park WH, Kang WK, Capes CE, Osberg GL, Chem. Eng. Sci., 24, 851 (1969)
Gabor JD, Chem. Eng. Prog., 62(76), 35 (1966)
