Flow characteristics near the nozzle of a bubble column with simultaneous gas-liquid injection
- Government Industrial Development Lab., Sapporo (Japan). Resources and Energy Technology Dept.
- Hokkaido Univ., Sapporo (Japan)
- Kyushu Univ., Fukuoka (Japan)
Due to their simplicity of construction which precludes the possibility of blockage, simultaneous gas-liquid injectors and liquid ejectors find application to gas-liquid-solid chemical processes such as coal liquefaction. The gas holdup, bubble rising velocity, and bubble diameter near the nozzle in a bubble column with simultaneous gas and liquid injection were measured using an optical fiber probe. A jet-like spouting flow was formed around the nozzle; the height of the jet was independent of the diameter of the nozzle. Bubbles were formed near the side wall and near the top of the jet, with their radial dispersion increasing with increasing height. Beyond {approximately}88 cm from the nozzle, the radial distribution of the gas holdup was uniform and independent of the axial height. The radial dispersion and bubble diameter varied with the nozzle diameter. The effects of simultaneous gas-liquid injection on bubble formation were similar to those of an increase in the pressure.
- OSTI ID:
- 43109
- Journal Information:
- International Chemical Engineering, Journal Name: International Chemical Engineering Journal Issue: 4 Vol. 34; ISSN INCEAX; ISSN 0020-6318
- Country of Publication:
- United States
- Language:
- English
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