日本海水学会誌
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
24 巻, 6 号
選択された号の論文の4件中1~4を表示しています
  • 海水の冷凍脱塩に関する研究 (第7報)
    川崎 成武, 大輪 優
    1971 年 24 巻 6 号 p. 240-248
    発行日: 1971年
    公開日: 2013/02/19
    ジャーナル フリー
    Characteristics of an ice wash column was investigated under non-washing condition. Ice crystalsproduced by the second refrigerant freezing method were used in this experiment.
    The hydraulic piston bed (HPB) formed in the wash column showed a zigzag upward movementby the effect of the wall friction. The average velocity was in proportion to the pressure drop ofthe solution flowing in the driving section, but this relation was remarkably changed by thesaturation of the residual solution in the washing section. Under the higher pressure drop, theaverage porosity of the bed in the driving section was nearly the same as that of the top bed inthe washing section, but under the lower pressure drop, the former was a little larger than thelatter, while those values of the porosity were distributed in the range of ±10% in the relationwith the pressure drop. Therefore, the HPB was considered to consist of the bed in which theporosity was not uniform, and especially it was considered to consist of a compressible one underthe lower pressure drop.
    Under the non-washing condition, it may be assumed that the saturation of the residual solutionof the top bed just equalled to the unit when the HPB moves upward with the maximum allowancevelocity. From the relation between the average velocity of the HPB and the saturation of theresidual solution of the top bed, it was found that both the maximum allowace velocities of the HPB were about 24cm/min and 30cm/min, respectively, when the porosity of the top bed was 0.4 and 0.5
  • 中嶋 義弘, 和田 勝義, 田原 浩一
    1971 年 24 巻 6 号 p. 248-253
    発行日: 1971年
    公開日: 2013/02/19
    ジャーナル フリー
    Direct-contact heat-transfer between steam and single liquid column was studied at 0.35--0.89 ata. As the result, nearly constant value of overall heat-transter cofficient was obtained. This valuewas about 1000 (kcal/m2hr0C) and was nearly constant independently of steam pressure, liquidcolumn diameter and liquid flow rate. This fact suggests that the interface resistance of direct-ontact heat-transfer was unexpectedly large.
  • 早野 市郎, 後藤 藤太郎, 石坂 誠一
    1971 年 24 巻 6 号 p. 253-258
    発行日: 1971年
    公開日: 2013/02/19
    ジャーナル フリー
    水酸化ナトリウムおよびカリウムの混合水溶液よりNaOH・3.5H2Oの結晶を析出させ, 水酸化ナトリウムの精製と水酸化カリウムを濃縮するプロセスの基礎資料として, NaOH-KOH-H2O系におけるNaOH・3.5H2Oの消失温度を全水酸化アルカリの濃度が33~43wt.%, 全水酸化アルカリに対する水酸化カリウムの比率を0~60wt.%の範囲で測定した. 全水酸化アルカリの濃度が一定ならば水酸化カリウムの比率が増加するにしたがつて消失温度は低下した. 全水酸化アルカリの濃度が39wt.%の溶液を-5℃まで冷却すれば水酸化カリウムの比率を50wt.%まで, -13℃まで冷却すれば60wt.%まで全水酸化アルカリ中の水酸化カリウムの比率を濃縮できることがわかつた. 次に消失温度を全水酸化アルカリ濃度および水酸化カリウムの比率の多項式で表わせると仮定し, 多項式の係数を最少2乗法で求めた, その結果, 多項式の次数を4にすれば0.1%の平均相対誤差で近似できることが明らかになつた.
  • おもに塩務に関する分析方法について
    尾方 昇
    1971 年 24 巻 6 号 p. 259-278
    発行日: 1971年
    公開日: 2013/02/19
    ジャーナル フリー
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