The Experimental Study on a Spray Flash Desalination

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  • スプレーフラッシュ蒸発式海水淡水化に関する実験的研究
  • スプレーフラッシュ蒸発式海水淡水化に関する実験的研究(噴流方向の影響)
  • スプレー フラッシュ ジョウハツシキ カイスイ タンスイカ ニ カンスル ジッケンテキ ケンキュウ フンリュウ ホウコウ ノ エイキョウ
  • Influence of the Direction of Injection
  • 噴流方向の影響

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Abstract

This paper presents a comparison study of a spray flash desalination process with the direction of injection based on experimental results for upward jet spray flash evaporation. Superheated water at 24, 30, 40°C was injected upward into adepressurized chamber through cylindrical nozzle made of stainless steel to compare with the phenomenon of a downward jet spray flash evaporation method.<BR>Series of experiment were carried out to analyze the effect of the direction of injection against the spray flash evaporation phenomenon. The nozzle for this experiment is a tube type with an internal diameter of 20 mm and a length of 81.3 mm. The range of the mean velocity of the superheated water inlet was from 1.74 to 3.62 m/s. The temperature decent of the superheated water inlet along nozzle axis was measured by a thermal resistance. Furthermore, the data and empirical equation for the downward jet method previously reported were used to compare with the experimental results on the upward jet method.<BR>As a result, a tendency that the upward jet method needs shorter distance to complete the flash evaporation than the downward jet method was observed. Therefore, the upward jet method has the possibility of making the spray flash desalination system more compact and efficient.

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