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Among the various methods used for glass edge sealing, this study uses microwaves to seal glass edges. Through basic experiments, the main process conditions for edge sealing of glass were derived, and the experimental plan and analysis were carried out using the Box-Behnken method of response-surface analysis based on 3 factors and 3 levels. The step height which influences sealing was set as a response variable. If the step height becomes too large, the glass can be damaged, and if the step height is too small, the edge sealing will not be performed. Accordingly, process optimization that edge sealing is possible while minimizing the step height was carried out. A predictable regression equation was derived for the step height of edge sealing and the main-effect analysis was performed for the step height. Using the response-optimization tool, we derived the optimum process condition that minimized the step height of the edge sealing and verified that it matched the error value of 4.1% compared with the target value of the step height measurement result confirmed through the verification experiment. [ABSTRACT FROM AUTHOR]

Among the various methods used for glass edge sealing, this study uses microwaves to seal glass edges. Through basic experiments, the main process conditions for edge sealing of glass were derived, and the experimental plan and analysis were carried out using the Box-Behnken method of response-surface analysis based on 3 factors and 3 levels. The step height which influences sealing was set as a response variable. If the step height becomes too large, the glass can be damaged, and if the step height is too small, the edge sealing will not be performed. Accordingly, process optimization that edge sealing is possible while minimizing the step height was carried out. A predictable regression equation was derived for the step height of edge sealing and the main-effect analysis was performed for the step height. Using the response-optimization tool, we derived the optimum process condition that minimized the step height of the edge sealing and verified that it matched the error value of 4.1% compared with the target value of the step height measurement result confirmed through the verification experiment.

In this study a steady-state model was developed for a six stage bleaching system in a pulp and paper industry. A fortran source code was written to simulate the whole bleach plant. Different case studies were performed with the aim of decreasing the total amount of dissolved solids coming out from the six washers. Each stage of the sequence is composed of chemical additions and mixing, reaction in a retention tower, and washing. Unit operation models were formulated using mass balances on liquor, fibres, chromophores, chemicals and dissolved solids. In order to compare the simulation results with the mill data, Dalaman SEKA Pulp and Paper Mill bleaching unit was chosen. A good agreement between the simulation results and the mill data was achieved. In the case studies, the optimization of the process variables were performed in which the effects of retention tower operating temperature, residence time, consistency, bleaching liquor flow rate and the wash water flow rates in the washers were studied. Also, the effect of 100% chlorine dioxide substitution in the chlorination stage was analyzed. It was concluded that 100% chlorine dioxide substitution was the best way to decrease the amount of dissolved solids. [Copyright &y& Elsevier]