Heat Transfer Model for Regenerative Beds
Publication: Journal of Environmental Engineering
Volume 126, Issue 10
Abstract
Regenerative catalytic oxidizers (RCO) are an economic and effective means of controlling volatile organic compounds with concentrations exceeding 1,200 mg/m3 in a gas stream. However, factors influencing the performance of RCO when treating volatile organic compounds in gas streams have seldom been addressed. Therefore, this study presents a convection-dispersion model with an effective thermal diffusivity αe as a parameter to simulate the performance of RCO. To verify the effectiveness of the proposed model, a pilot-scale RCO was constructed with two 20 × 200 cm (inside diameter × height) regenerative beds. Gravel was used as the thermal regenerative solid material. Experimental results indicated that the model with an αe of 2.0–3.8 × 10−6 m2/s can be used to describe the time variation of solids temperature with the packing height at superficial gas velocities Ug of 0.080–0.382 m/s. Values of αe for the bed are closer to those for the gravel solids (αs = 1.0 × 10−6 m2/s) than for air (αg = 54 × 10−6 m2/s). Those results further demonstrate that the conductive heat transfer in the solid material in the axial direction of the bed is a major controlling factor for the performance of the RCO and the convective one is a minor factor in the present case.
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References
1.
Boussant-roux, Y., Zanoli, A., and Leahy, W. D., Jr. ( 1995). “Latest development in measurement of regenerative thermal performance.” Ceram. Eng. Sci. Proc., 16(2), 74–83.
2.
Don, J. A., and Feenstra, L. ( 1984). “Odour abatement through biofiltration.” Proc., Symp. on Characterization and Control of Odoriferous Pollutants in Process Industries.
3.
Flagan, R. C., and Seinfeld, J. H. ( 1988). Fundamentals of air pollution engineering, Prentice-Hall, Englewood Cliffs, N.J.
4.
Geankoplis, C. J. ( 1995). Transport processes and unit operations, 3rd Ed., Prentice-Hall International, Singapore, 332–333.
5.
Kunii, D., and Levenspiel, O. ( 1969). Fluidization engineering, Wiley, New York, 211.
6.
Levenspiel, O., and Smith, W. K. ( 1957). Chemical Engrg. Sci., 6, 227.
7.
Perry, R. H., and Green, D. W. ( 1997). Perry's chemical engineers' handbook, 7th Ed., McGraw-Hill, New York.
8.
Suzukawa, Y., Sugiyama, S., and Mori, I. ( 1996). “Heat transfer improvement and NOx reduction in an industrial furnace by regenerative combustion system.” Proc., Intersociety Energy Conversion Engrg. Conf., 804–809.
9.
Tamme, R., Grözinger, U., Kanwischer, A., and Neitzel, U. ( 1995). “Advanced regenerative media for industrial and solar thermal applications.” Proc., Intersociety Energy Conversion Engrg. Conf., 218–221.
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Received: Oct 5, 1999
Published online: Oct 1, 2000
Published in print: Oct 2000
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