高含氮料源於渦旋式流體化床燃燒爐中燃燒之研究

溫佳叡

doi:10.6840/CYCU.2011.00453

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高含氮料源於渦旋式流體化床燃燒爐中燃燒之研究

A Study of High Nitrogen Content Feedstock Combustion in a Vortexing Fluidized Bed Combustor

溫佳叡 , Masters　　Advisor：錢建嵩　　

繁體中文 DOI： 10.6840/CYCU.2011.00453

流體化床燃燒；高含氮量；旋風分離器；氮氧化物； fluidized bed combustion ； high nitrogen content ； cyclone

Abstract │ Reference (28) │ Times Cited (3) │ Altmetrics

Abstract 〈TOP〉

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Abstract

A bench-scale vortexing fluidized bed combustor (VFBC) was set up in this study. The combustor cross area is 0.22 × 0.11 m2, and the freeboard is in 0.154 m I.D. and 4 m height. The secondary air injected nozzles were installed tangentially at the bottom of freeboard. Pig hide was used as the fuel in this study. Silica sand was employed as the bed material. The effects of various operating parameters, such as bed temperature, stoichiometric oxygen in the combustion chamber the excess oxygen ratio, freeboard temperature, static bed height and the diameter of bed material were investigated. The effects of operating conditions on NO and CO emissions at the cyclone inlet and outlet were also investigated.

The results of CO emissions show that the effect freeboard temperature is more important than the excess oxygen ratio. The results of NO emissions show that the effect of the excess oxygen ratio is more important than the effect of bed temperature, and the effect of stoichiometric oxygen in the combustion chamber is the lowest of the three parameters. The experimental results of the effect of freeboard temperature show that when the freeboard temperature is at 750℃and 800℃, the emissions of NO is low but CO is high and with the increasing of the freeboard temperature the NO concentration will first increase then decrease at 900℃. For the results of CO and NO emissions at the inlet and outlet cyclone, the cyclone has more effect on CO emissions than NO emissions, especially CO emissions is high.

Reference ( 28 ) 〈TOP〉

Arromdee, P., V. I. Kuprianov, R. Kaewklum and K. Sirisomboon, “Experimental Study on Combustion of Sunflower Shells in a Pilot Swirling Fluidized-Bed Combustor”, Energy & Fuels, 24, 3850-3859 (2010).
連結：
Bahillo, A., L. Armesto, A. Cabanillas, J. Otero, “Thermal Valorization of Footwear Leather Wastes in Bubbling Fluidized Bed Combustion”, Waste Management, 24, 935-944 (2004)
連結：
Bergsma, F., “Abatement of NOx from Coal Combustion. Chemical Background and Present State of Technical Development” , Ind. Eng Chem. Process, 24(1), 1-7 (1985).
連結：
De-Store, G. G., E. Croiset and J. R. Richard, “Heterogeneous N2O and NO formation from bound nitrogen during coal char combustion”, Symposium On Combustion, 23, 1257-1264 (1990).
連結：
Dowd, B. M., D. Press, M. L. Huertos, “Agricultural nonpoint source water pollution policy: The case of California’s Central Coast”, Agriculture, Ecosystems and Environment, 128, 151-161 (2008)
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