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Brazilian Journal of Chemical Engineering

Print version ISSN 0104-6632On-line version ISSN 1678-4383

Abstract

ZBICINSKI, I.; SMUCEROWICZ, I.; STRUMILLO, C.  and  CROWE, C.. Application of pulse combustion technology in spray drying process. Braz. J. Chem. Eng. [online]. 2000, vol.17, n.4-7, pp.441-450. ISSN 0104-6632.  http://dx.doi.org/10.1590/S0104-66322000000400009.

The paper presents development of valved pulse combustor designed for application in drying process and drying tests performed in a specially built installation. Laser technique was applied to investigate the flow field and structure of dispersed phase during pulse combustion spray drying process. PDA technique was used to determine initial atomization parameters as well as particle size distribution, velocity of the particles, mass concentration of liquid phase in the cross section of spray stream, etc., in the drying chamber during drying tests. Water was used to estimate the level of evaporation and 5 and 10% solutions of sodium chloride to carry out drying tests. The Computational Fluid Dynamics technique was used to perform theoretical predictions of time-dependent velocity, temperature distribution and particle trajectories in the drying chamber. Satisfactory agreement between calculations and experimental results was found in certain regions of the drying chamber.

Keywords : Valved and valveless pulse combustors; Time dependent flow calculations; Drying process calculations.

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