Abstract
This paper presents computer simulation of heat transfer in alumina and cement rotary kilns. The model incorporates radiation exchange among solids, wall, and gas, convective heat transfer from the gas to the wall and the solids, contact heat transfer between the covered wall and solids, and heat loss to the surrounding as well as chemical reactions. The mass and energy balances of gas and solids have been performed in each axial segment of the kilns. The energy equation for the wall is solved numerically by the finite-difference method. The dust entrainment in the gas is also accounted for. The solution marches from the solids inlet to the solids outlet. The kiln length predicted by the present model of the alumina kiln is 77.5 m as compared to 80 m of the actual kiln of Manitius et al. (1974, “Mathematical Model of an Aluminum Oxide Rotary Kiln,” Ind. Eng. Chem. Process Des. Dev., 13(2), pp. 132–142). In the second part, heat transfer in a dry process cement rotary kiln is modeled. The melting of the solids and coating formation on the inner wall of the kiln are also taken into account. A detailed parametric study lent a good physical insight into axial solids and gas temperature distributions, and axial variation of chemical composition of the products in both the kilns.
Issue Section:
Research Papers
Keywords:
rotary kilns,
alumina production,
cement production,
heat transfer,
chemical reactions,
computer simulation,
conduction,
forced convection,
heat exchangers,
radiative heat transfer,
thermal systems,
very high-temperature heat transfer
Topics:
Kilns,
Solids,
Temperature,
Rotary kilns,
Heat transfer,
Chemical reactions,
Dust,
Cements (Adhesives)
References
1.
Manitius
, A.
, Kurcyusz
, E.
, and Kawecki
, W.
, 1974
, “Mathematical Model of the Aluminum Oxide Rotary Kiln
,” Ind. Eng. Chem. Process Des. Dev.
, 13
(2
), pp. 132
–142
. 2.
Lyons
, J. W.
, Min
, H. S.
, Parisot
, P. E.
, and Paul
, J. F.
, 1962
, “Experimentation With a Wet-Process Rotary Cement Kiln Via the Analog Computer
,” Ind. Eng. Chem. Process Des. Dev.
, 1
(1
), pp. 29
–33
. 3.
Spang
H. A.
, III, 1972
, “A Dynamic Model of a Cement Kiln
,” Automatica
, 8
(3
), pp. 309
–323
. 4.
Guruz
, H. K.
, and Bac
, N.
, 1981
, “Mathematical Modelling of Rotary Cement Kilns by the Zone Method
,” Can. J. Chem. Eng.
, 59
(4
), pp. 540
–548
. 5.
Mastorakos
, E.
, Massias
, A.
, Tsakiroglou
, C. D.
, Goussis
, D. A.
, Burganos
, V. N.
, and Payatakes
, A. C.
, 1999
, “CFD Predictions for Cement Kilns Including Flame Modelling, Heat Transfer and Clinker Chemistry
,” Appl. Math. Model.
, 23
(1
), pp. 55
–76
. 6.
Mujumdar
, K. S.
, and Ranade
, V. V.
, 2006
, “Simulation of Rotary Cement Kilns Using a One-Dimensional Model
,” Chem. Eng. Res. Des.
, 84
(3
), pp. 165
–177
. 7.
Mujumdar
, K. S.
, Arora
, A.
, and Ranade
, V. V.
, 2006
, “Modeling of Rotary Cement Kilns: Applications to Reduction in Energy Consumption
,” Ind. Eng. Chem. Res.
, 45
(7
), pp. 2315
–2330
. 8.
Tscheng
, S. H.
, and Watkinson
, A. P.
, 1979
, “Convective Heat Transfer in a Rotary Kiln
,” Can. J. Chem. Eng.
, 57
(4
), pp. 433
–443
. 9.
Mintus
, F.
, Hamel
, S.
, and Krumm
, W.
, 2006
, “Wet Process Rotary Cement Kilns: Modeling and Simulation
,” Clean Technol. Environ. Policy
, 8
(2
), pp. 112
–122
. 10.
Sadighi
, S.
, Shirvani
, M.
, and Ahmad
, A.
, 2011
, “Rotary Cement Kiln Coating Estimator: Integrated Modelling of Kiln With Shell Temperature Measurement
,” Can. J. Chem. Eng.
, 89
(1
), pp. 116
–125
. 11.
Mikulčić
, H.
, Von Berg
, E.
, Vujanović
, M.
, Priesching
, P.
, Perković
, L.
, Tatschl
, R.
, and Duić
, N.
, 2012
, “Numerical Modelling of Calcination Reaction Mechanism for Cement Production
,” Chem. Eng. Sci.
, 69
(1
), pp. 607
–615
. 12.
Csernyei
, C.
, and Straatman
, A. G.
, 2016
, “Numerical Modeling of a Rotary Cement Kiln With Improvements to Shell Cooling
,” Int. J. Heat Mass Transfer
, 102
, pp. 610
–621
. 13.
Wirtz
, S.
, Pieper
, C.
, Buss
, F.
, Schiemann
, M.
, Schaefer
, S.
, and Scherer
, V.
, 2020
, “Impact of Coating Layers in Rotary Cement Kilns: Numerical Investigation With a Blocked-Off Region Approach for Radiation and Momentum
,” Therm. Sci. Eng. Prog.
, 15
, p. 100429
. 14.
Dumont
, G.
, and Bélanger
, P. R.
, 1978
, “Steady-State Study of a Titanium Dioxide Rotary Kiln
,” Ind. Eng. Chem. Process Des. Dev.
, 17
(2
), pp. 107
–114
. 15.
Watkinson
, A. P.
, and Brimacombe
, J. K.
, 1982
, “Limestone Calcination in a Rotary Kiln
,” Metall. Trans. B
, 13
(3
), pp. 369
–378
. 16.
Watkinson
, A. P.
, and Brimacombe
, J. K.
, 1983
, “Oxygen Enrichment in Rotary Lime Kilns
,” Can. J. Chem. Eng.
, 61
(6
), pp. 842
–849
. 17.
Ghoshdastidar
, P. S.
, Rhodes
, C. A.
, and Orloff
, D. I.
, 1985
, “Heat Transfer in a Rotary Kiln During Incineration of Solid Waste
,” 23rd ASME National Heat Transfer Conference
, Denver, CO
, Aug. 4–7
, ASME Paper No. 85-HT-86.18.
Kim
, N. K.
, Srivastava
, R.
, and Lyon
, J.
, 1988
, “Simulation of an Industrial Rotary Calciner With Trona Ore Decomposition
,” Ind. Eng. Chem. Res.
, 27
(7
), pp. 1194
–1198
. 19.
Barr
, P. V.
, Brimacombe
, J. K.
, and Watkinson
, A. P.
, 1989
, “A Heat-Transfer Model for the Rotary Kiln: Part I. Pilot Kiln Trials
,” Metall. Mater. Trans. B
, 20
(3
), pp. 391
–402
. 20.
Barr
, P. V.
, Brimacombe
, J. K.
, and Watkinson
, A. P.
, 1989
, “A Heat-Transfer Model for the Rotary Kiln: Part II. Development of the Cross-Section Model
,” Metall. Mater. Trans. B
, 20
(3
), pp. 403
–419
. 21.
Bui
, R.-T.
, Simard
, G.
, Charette
, A.
, Kocaefe
, Y.
, and Perron
, J.
, 1995
, “Mathematical Modeling of the Rotary Coke Calcining Kiln
,” Can. J. Chem. Eng.
, 73
(4
), pp. 534
–545
. 22.
Lee
, M.
, and Lee
, S.
, 1999
, “A Mathematical Model of Calcination of Limestone in Rotary Kiln
,” Steel Res.
, 70
(1
), pp. 15
–21
. 23.
Martins
, M. A.
, Oliveira
, L. S.
, and Franca
, A. S.
, 2001
, “Modeling and Simulation of Petroleum Coke Calcination in Rotary Kilns
,” Fuel
, 80
(11
), pp. 1611
–1622
. 24.
Georgallis
, M.
, Nowak
, P.
, Salcudean
, M.
, and Gartshore
, I. S.
, 2005
, “Modelling the Rotary Lime Kiln
,” Can. J. Chem. Eng.
, 83
(2
), pp. 212
–223
. 25.
Ginsberg
, T.
, and Modigell
, M.
, 2011
, “Dynamic Modelling of a Rotary Kiln for Calcination of Titanium Dioxide White Pigment
,” Comput. Chem. Eng.
, 35
(11
), pp. 2437
–2446
. 26.
Herz
, F.
, Specht
, E.
, and Abdelwahab
, A.
, 2017
, “Modeling and Validation of the Siderite Decomposition in a Rotary Kiln
,” Energy Procedia
, 120
, pp. 524
–531
. 27.
Kim
, N. K.
, Lyon
, J. E.
, and Suryanarayana
, N. V.
, 1986
, “Heat Shield for High-Temperature Kiln
,” Ind. Eng. Chem. Process Des. Dev.
, 25
(4
), pp. 843
–849
. 28.
Holman
, J. P.
, 1997
, Heat Transfer
, 6th ed., McGraw-Hill
, New York
.29.
Jacob
, M.
, 1957
, Heat Transfer
, Vol. II
, John Wiley and Sons, Inc.
, New York
.30.
Sleicher
, C.
, and Rouse
, M. W.
, 1975
, “A Convenient Correlation for Heat Transfer to Constant and Variable Property Fluids in Turbulent Pipe Flow
,” Int. J. Heat Mass Transfer
, 18
(5
), pp. 677
–683
. 31.
Li
, K. W.
, 1974
, “Application of Khodorov’s and Li’s Entrainment Equations to Rotary Coke Calciners
,” AIChE J.
, 20
(5
), pp. 1017
–1020
. 32.
Launder
, B. E.
, and Spalding
, D. B.
, 1974
, “The Numerical Computation of Turbulent Flows
,” Comput. Methods Appl. Mech. Eng.
, 3
(2
), pp. 269
–289
. 33.
Ghoshdastidar
, P. S.
, 2017
, Computational Fluid Dynamics and Heat Transfer
, Cengage Learning India Pvt. Ltd.
, New Delhi
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