Physical Simulation of Atomization Effect of Rare-Earth Chloride Spray Pyrolysis Device

doi:10.12068/j.issn.1005-3026.2019.02.013

Abstract

Abstract: Spray pyrolysis rare-earth chloride is a new process to produce rare-earth oxides， but there are some shortages at present such as the poor atomization effect of spray pyrolysis equipment and the non-uniform distribution of the droplet size after atomization. A Venturi tube spray pyrolysis reactor was designed and particle image velocimetry technology combined with MATLAB image processing technology was used to analyze the effects of gas flow rate， the size of Venturi tube and drainage tube on the atomization. The results show that the strong back-flow in the diffuser of Venturi tube can intensify the collision of gas-liquid phases and crush more drops， while the excessive amount of liquid phase in the Venturi tube increases the droplet density and collision probability of droplet in motion， leading to larger droplet size. The suitable geometric size for Venturi tube reactor are 100mm-inner diameter， 10mm-throat diameter， 5mm-inner diameter of drainage tube and the gas flow rate of 20.5m³/h.

Key words: spray pyrolysis, rare-earth oxide, Venturi jet reactor, atomizing effect, image processing

CLC Number:

TF845

LIU Yan， LI Xiao-long， ZHANG Chen， ZHANG Zi-mu. Physical Simulation of Atomization Effect of Rare-Earth Chloride Spray Pyrolysis Device[J]. Journal of Northeastern University Natural Science, 2019, 40(2): 218-223.

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