| 摘要 |
PROBLEM TO BE SOLVED: To improve the effect of defoaming. SOLUTION: In this ultrasonic defoaming method for defoaming a liquid to be defoamed by irradiating the liquid to be defoamed with ultrasonic wave through an ultrasonic wave propagating liquid while passing the liquid to be defoamed in a defoaming vessel from a liquid flow-in port of the defoaming vessel to a liquid flow-out port, the defoaming is performed in a condition satisfying an equation,ΔI*AS/(FR*CV*SF)>=0.0026, in a relation among the differenceΔI(kgf/cm<2> ) of sound pressure intensity between the node and the anti-node of the standing wave generated in the liquid to be defoamed in the defoaming vessel, the flow rate FR(mm/sec) of the liquid to be defoamed at the liquid flow-out port of the defoaming vessel, the viscosity CV(cp) of the liquid to be defoamed, the frequency SF(kHz) of ultrasonic wave and the degree of air saturation AS(%).
|
