Browsing by Author "Muysenberg, Hendrikus P. H."

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    Comparative study on energy-saving technologies for glass furnaces
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1992) Beerkens, Ruud G. C.; Muysenberg, Hendrikus P. H.
    Different new technologies for increasing the energy efficiency of glass furnaces have been compared. The most important technologies are: - batch and cullet preheating, using a fluidized bed for batch preheating and dust filtration; - thermochemical recuperators using a water/methane reformer; - oxygen burners; - advanced air preheat systems like ceramic recuperators; - twin-bed burners; - new combustion technologies. The energy savings of these different measures for an industrial glass furnace have been calculated by using an energy-balance model. A soda-lime glass furnace with a production rate of 250 t glass/d has been chosen as an example for making these comparisons. The economics of all these different technologies have not been compared here. Melting of batches with up to 100 % cullet may have additional advantages for the energy consumption because of the possible lower melting temperatures needed to remelt pure cullet without other raw materials. Batch and cullet preheaters are the most important systems for the near future. Besides the improvement of the energy efficiency, the impact of some of the mentioned energy-saving technologies on the reduction of the emissions of air pollutants like dust, nitrogen oxides, sulfur oxides, chlorides and fluorides seems to be promising.
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    Modeling of the aging of glass furnace regenerators
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1992) Beerkens, Ruud G. C.; Muysenberg, Hendrikus P. H.; Barklage-Hilgefort, Hansjürgen
    A model has been developed to predict the decrease of the thermal performance of glass furnace regenerators due to fouling by flue gas condensates. The model consists of four parts: a) description of the thermal performance (heat transfer) of regenerator checkers; b) description of the heat transfer in the furnace combustion chamber; c) determination of volatilization of sulfur, chloride and sodium components from the melt; d) modeling of chemical reactions in and deposition from flue gases in the regenerator. The aging and the reduction of the thermal efficiency due to fouling has been predicted: - for different checkerwork constructions or refractory types; - as a function of pull rate; - as a function of glass melt temperatures; - as a function of applied cullet fraction. Depending on the different conditions, the predicted increase in energy consumption is about 1 up to more than 3 %/year, mainly due to fouling. Cruciform and chimney block checkers seem to be less sensitive for this fouhng than basketweave packings. As molten glass temperatures increase, dust emissions and fouling rates are going up. According to the model calculations, a higher cullet fraction in the batch will lead to reduced aging rates of the regenerators. The model is in quite good agreement with practical observations in industrial furnaces.