Abstract
Separator, as one of the key components in supercritical CO2 dyeing apparatus, shows the function of separating CO2 and dyes, thus affecting the reutilization of CO2 and the subsequent dyeing production. In this study, pressure drop and separation efficiency of the separator were investigated by employing the flow field analysis software FLUENT. Fluid area calculation of the separator was conducted using Reynolds stress model as the turbulence model and SIMPLEC algorithm. Moreover, separation efficiency of CO2 gas and dyes in the separator was determined by employing Discrete phase model as the calculation model of dye particle phase. Numerical results showed that the total pressure drop of the separator increased from 1.43 Pa to 122.70 Pa with the inlet flow rate of CO2 increased from 50 L/h to 2000 L/h. The total separation efficiency of the separator improved significantly from 4.35% to 38.22% when the inlet flow rate increased from 100 L/h to 2000 L/h.
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