关于气提升理论及公式的探讨(Ⅰ)

Discussion on Airlift Design Theory and Formula(Ⅰ)

气提升在水处理领域应用十分广泛。传统观点认为,气提升的原理是利用升液管内、外液体的密度差使液体得到提升。通过理论分析及试验论证,提出气提升是气体通过膨胀做功将其压能转化为液体的重力势能与动能,同时伴随能量损失的过程,并推导出气水比与液体密度、提升高度、浸没深度、提升管出口压力等参数间的定量关系式,为气提升系统的设计提供了依据。

Airlift process is widely used in water treatment. According to a traditional view, the liquid lifting force comes from the density difference between riser and downcomer during airlift. Theory analysis and experimental research concluded that during the airlift process, pressure potential of the compressed gas was converted to gravitational potential energy and kinetic energy of the liquid plus con- tinuous energy loss. Moreover, the quantitative formulas that related gas-water ratio to liquid density, lift- ing height, immersion depth and pressure of riser outlet were derived. The findings provide a basis for airlift design.