Location Selection of Extra Nuclei Injecting for Inner - Core SGS Device with Droplet Enlargement Measure

Abstract:

Supersonic gas separation (SGS) is a novel gas separation technology proposed in recent years. The Inner-core SGS device with droplet enlargement measure has been proved to perform effectively for processing low-pressure gas mixture with one condensable component. The effectiveness of the droplet enlargement measure depends largely on the adding location of extra nuclei. A two-phase flow model was established in which the droplet movement was simulated by dispersed phase model. Using the model, movements of nuclei from three potential locations of Inner-core SGS device, inlet of swirl generator (Ⅰ), throat of supersonic nozzle (Ⅱ) and inner-taper core (Ⅲ), were simulated and the possibility of vapor condensation on nuclei was predicted. The simulation results showed that the droplets injected from location Ⅲ had smaller size (0.0183mm~ 0.0953mm), longer residence time (0.43 ms) and longer axial running distance (58.9 mm). The gas flow near that region had bigger supersaturation (larger than 1). Thus, the best location of Inner-core SGS device for nuclei injection was determined at the throat of the inner-taper core (Ⅲ).

• Periodical: Advanced Materials Research (Volumes 516-517)
• Pages: 931-934
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.516-517.931
• Online since: May 2012
• Authors: Qing Fen Ma
• Keywords: Dispersed Phase Model, Heterogeneous Nucleation, Supersonic Gas Separation Technology

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