| 摘要 |
PROBLEM TO BE SOLVED: To provide a degasifier capable of performing effective, continuous and high degree degasification/sterilization of water without requiring any drive by electric power for generating ultrasonic energy. SOLUTION: This degasifier is provided with: a pressurization means for compressing water to be treated; a degasification tank whose pressure is reduced to a vacuum pressure of a higher pressure value than the boiling pressure (saturated vapor pressure) of water by using a vacuum pump; a degasification nozzle for injecting the above compressed water to be treated by the pressurization means into the degasification tank whose pressure is reduced to such a high vacuum pressure, to allow the compressed water to impinge on an impingement member in the degasification tank and thereby to instantaneously subject the water to adiabatic expansion; and an excitation means for applying ultrasonic vibration to the water to be treated at the injection nozzle tip of the degasification nozzle by a vibration effect due to utilization of fluid pressure of the water to be treated. Thus, with a combination of an effect due to ultrasonic waves which are excited by utilizing fluid energy of the jet of water to be treated, and a degasification effect due to jet impingement of the compressed water under reduced pressure, both advanced water degasification treatment through compression and instantaneous adiabatic expansion of the water to be treated and advanced water sterilization treatment through destruction of cells of water microorganisms can be performed.
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