加压大型鼓泡床反应器中气泡上升速率的研究

Experimental Research of Bubble Rising Velocity in Pressurized Bubble Column

在内径0 3m、高6 6m的加压鼓泡床反应器内采用床层塌落技术测量气泡上升速率。在液体粘度(1 43～3 54)×10-3Pa·s、液体表面张力(49 9～70 0)×10-3N/m、系统压力0 1～1 6MPa、表观气速0 06～0 28m/s范围内,考察了表面张力、粘度、压力、表观气速对大小气泡上升速率的影响。结果表明,大气泡上升速率随表观气速的上升而上升,而小气泡速率受表观气速的影响非常小。

Bubble rising velocity is measured with dynamic gas disengagement(DGD) in a pressurized bubble column,0 3 m in diameter,6 6m in height.The effects of superficial tension,velocity,pressure and superficial gas velocity on large-bubble rising velocity and small-bubble rising velocity are investigated.Large-bubble rising velocity increases with increase of superficial gas velocity while small-bubble rising velocity varies very little.