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| Effect of Ultrasonic on Mass Transfer of Oxygen-Water Gas-Liquid Two-Phase and Apparent Dissolved Oxygen |
| Received:April 08, 2021 Revised:April 13, 2021 |
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| DOI：doi：10.3969/j.issn.1007-7545.2021.09.004 |
| KeyWord:ultrasonic; dissolved oxygen; degassing; mass transfer coefficient |
| Author | Institution |
| SHU Zi-gang |
东北大学 冶金学院 |
| CHANG Yong-feng |
东北大学 冶金学院 |
| WANG Wei |
东北大学 冶金学院 |
| XIE Feng |
东北大学 冶金学院 |
| ZHANG Li-bo |
昆明理工大学 冶金与能源工程学院 |
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| Abstract: |
| Volume mass transfer coefficient of oxygen-water gas-liquid two-phase and dissolved oxygen in water was studied in presence of a 20 kHz ultrasonic. Dissolved oxygen of solution was measured by electrochemical method. Volume mass transfer coefficients of oxygen-water gas-liquid two-phase in water with or without ultrasonic were calculated from experimental data. Effects of ultrasonic on volume mass transfer coefficient of oxygen-water gas-liquid two-phase and dissolved oxygen in water were investigated at different temperatures and different ultrasonic power. The results show that ultrasonic promotes gas-liquid mass transfer and presence of ultrasonic rises volume mass transfer coefficient of oxygen-water gas-liquid two-phase from 0.004 4 s-1 to 0.005 5—0.006 9 s-1. Besides, ultrasonic changes equilibrium concentration of dissolved oxygen in water. Presence of ultrasonic reduces apparent dissolved oxygen concentration in water by 10%—20%. |
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