Evaporation experiments and modelling for glass melts
article
A laboratory test facility has been developed to measure evaporation rates of different volatile components from commercial and model glass compositions. In the set-up the furnace atmosphere, temperature level, gas velocity and batch composition are controlled. Evaporation rates have been measured for sodium, potassium, boron and chloride species released from different glass types. From mass transfer relations, derived from computational fluid dynamics (CFD) modelling and experiments, and the measured volatilisation rates, information on the chemical activities of the volatile glass components can be derived. The measured evaporation rates or adapted mass transfer relations and chemical activities can be applied in mathematical models of evaporation. Such models have been developed to simulate evaporation processes in industrial glass furnaces and to estimate the resulting emissions. Besides evaporation and emission rates, depletion of volatile components at the glass melt surface has been investigated. The models enable evaluation of changes in combustion chamber design or the effect of burner type on the evaporation rates and emissions of particulates and boron compounds.
Topics
TNO Identifier
240023
ISSN
00319090
Source
Glass Technology: European Journal of Glass Science and Technology Part A, 48(3), pp. 113-118.
Pages
113-118
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