The Selection of Ceramic Dry Granulating Machine Spray Device Based on the DPM Model

Abstract:

In order to improve the dispersity of true particles in the process of ceramic dry granulation, by adding a sprayer in the upper of granulation chamber to make water spray into droplets, which greatly increases the contact area of liquid water and powder. The atomization flow field of plain-orifice-nozzle, pressure-swirl-nozzle, air-blast-nozzle, effervescent-nozzle with 1mm nozzle diameter is simulated based on the DPM model, obtaining the droplet size distribution cloud picture and atomization flow field simulative cloud picture of four kinds of nozzle. The simulation results show that the average droplet size of pressure-swirl-nozzle is the minimum and the disperisity of atomization flow field of air-blast-nozzle, effervescent-nozzle, pressure-swirl-nozzle, plain-orifice-nozzle increases in turn. In terms of the average droplet size and the dispersity of atomization flow field, the droplet dispersity of pressure-swirl-nozzle is better and the average droplet size is the minimum, which is most beneficial to solve the problem of fully dispersity of really particle. Therefore, pressure-swirl-nozzle is best fit for the spray device of ceramic dry granulation.

• Periodical: Applied Mechanics and Materials (Volumes 716-717)
• Pages: 573-576
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.716-717.573
• Online since: December 2014
• Authors: Nan Xing Wu*, Tian Tian Zhan, Zhu Ting Jiang
• Keywords: Dispersity, DPM, Dry Granulation, Numerical Simulation, Spray Device

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