Showing papers by "Ireneusz Zbicinski published in 2002"
TL;DR: In this article, a spray drying tunnel was designed, built and tested using phase Doppler anemometry (PDA) technique to determine initial spray atomization parameters, the structure of spray during drying, particle size distribution, velocity of the particles, mass concentration of the liquid phase, etc.
77 citations
TL;DR: In this article, a unique experimental equipment for extensive trials on the spray drying kinetics and particles residence time involving "in situ" analysis of the properties of continuous and dispersed phases was designed, built, and tested.
Abstract: A unique experimental equipment for extensive trials on the spray drying kinetics and particles residence time involving “in situ” analysis of the properties of continuous and dispersed phases was designed, built, and tested. Advanced experimental techniques (including laser techniques) to determine current parameters of spray drying process (temperature, humidity, moisture content) and current structure of spray (particle size distribution, particle velocities, etc.) were employed. Full scale spray drying tests of baker's yeast and maltodextrin enabled identification of the effect of process parameters on drying kinetics and spray residence time in the tower. Quantitative relationship describing spray drying kinetics as a function of atomization ratio and drying agent temperature were determined. The experimental results proved that spray residence time was controlled by atomization ratio and airflow rate. Drying kinetics in spray drying process is presented for the first time in the literature.
62 citations
TL;DR: In this paper, the authors present the analysis of potential and real benefits of pulse combustion process applied in drying, its mechanism, pulse combustors designs, advantages and disadvantages of this technology were described and reviewed.
32 citations
TL;DR: In this paper, a comprehensive overview of pulse combustion, as applied to industrial drying, is given, and two drying mechanisms are postulated, based on data from the literature and from the authors' experiments in the drying of solids and dispersed liquids.
Abstract: This paper provides a comprehensive overview of pulse combustion, as applied to industrial drying. A concise description is given, of the pulse combustion process and its basic features. Pulse combustion experimental data on drying kinetics for solid materials are compared to those of continuous combustion, and interpreted in terms of water bonding and internal/external drying conditions. Two drying mechanisms are postulated, based on data from the literature and from the authors' experiments in the drying of solids and dispersed liquids. Experimental (LDA analysis) and theoretical (CFD modeling) approaches are presented, to describe the flow field generated by the pulse combustor in the drying chamber. Environmental aspects (acoustic noise and pollutant emissions) are discussed. Finally, the issues of user-acceptance and reliability of pulse combustion drying are raised, in regards to noise level and combustor-dryer interaction.
14 citations
TL;DR: In this article, a mathematical model of gas-dynamical processes in a pulse combustion chamber for drying of materials is formulated with regard for the second viscosity, and results of numerical solution of the gas-Dynamical problem are reported.
10 citations