Automatic Control of Salt Manufacturing Process (II)

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  • HASEGAWA Masami
    Sea Water Science Research Laboratory, The Salt Industry Center of Japan
  • ITO Hiroshi
    Sea Water Science Research Laboratory, The Salt Industry Center of Japan

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Other Title
  • 製塩工程の自動化技術 (第2報)
  • 製塩工程の自動化技術(第2報)差圧法による缶内液組成管理方法の検討
  • セイエン コウテイ ノ ジドウカ ギジュツ ダイ 2ホウ サアツホウ ニヨル
  • Control of Composition of Solution in an Industrial Crystallizer by Pressure Difference Method
  • 差圧法による缶内液組成管理方法の検討

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Abstract

A cylindrical pressure differencemeter, in which two pressure gauges were attached 2,000mm apart vertically, was tested to detect the Baume specific gravity of the solution (concentrated brine or mother liquid). Methods for measuring degree of Baume using a conventional densimeter and a refractometer were also tested. The Baum especific gravity obtained by the pressure difference method was in good agreement with that deterlnined by the densimeter. But the refraction index was not correlated with the Baume specific gravity. These physical properties were correlated with the change in the salt concentrations in the solution. An estimating method for the composition by combhling the ratio of salt concentration of brine obtained from the electro dialysis process was proposed.

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