ULTRASONIC DEFOAMING METHOD

摘要

PURPOSE:To enhance the floating speed of air bubbles and defoaming capacity, by irradiating a silver halide emulsion in a liquid supply system with ultraviolet waves by using an ultrasonic vibrator arranged to the outer peripheral surface of a pipe body of which the pipe axis is held in an up-and-down direction so as to direct the same to the center of the pipe. CONSTITUTION:Ultrasonic vibrators 12, 12... are arranged to the outer surface of a circular or a polygonal pipe body 11 of which the pipe axis is held in an up-and-down direction so as to be directed to the pipe center in the peripheral direction thereof. A liquid (a) to be defoamed being a silver halide emulsion flowed down through a liquid guide pipe 14 provided in the pipe body 11 from an inflow port 13a connected on the way of the liquid sending system of said liquid (a) to be defoamed is irradiated with the ultrasonic wave generated from the ultrasonic vibrators 12 in such a state that a warmth preserving liquid (b) filling the gap part 15 between the liquid guide pipe 14 and the pipe body 11 is used as a propagation medium to be defoamed. Air bubbles (c) mixed in the liquid (a) to be defoamed are floated to be accumulated in the air bubble sump part 8 provided to the top part of the liquid guide pipe 14 and discharged to the atmosphere by timely opening an air vent valve 9.