New Proposal for Chemical Reaction System of Scale Components and Water Treatment Chemicals of Phosphate/Alkali Type in Marine Boilers

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  • スケール成分とりん酸塩系清缶剤の化学反応モデルの推定
  • スケール セイブン ト リンサンケイ セイカンザイ ノ カガク ハンノウ モデル ノ スイテイ

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In our previous papers, some experiments by the use of an actual boiler have been carried out in order to investigate the effects of sea water mixing on boiler water qualities, especially on pH, concentrations of PO43- and of Cl-, and Electric Conductivity EC. Experimental study by the use of an autoclav was also carried out in order to investigate the behavior of Mg hardness when OH- and/or PO43- coexisted, and when silica was mixed. The study mentioned above revealed that there was a limitation of the applicability of the conventional chemical reaction model developed so far.<BR>This paper considers, therefore, a new model regarding the chemical reaction system of scale components and water treatment chemicals of phosphate/alkali type. The validity of a new proposed model is proved by the comparison of the estimation according to the new model with the experimental result in the case when sea water mixed into boiler water.

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