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    • 3. 发明专利
    • Production system for sodium chloride
    • 氯化钠生产系统
    • JP2007230803A
    • 2007-09-13
    • JP2006052419
    • 2006-02-28
    • Mitsui Eng & Shipbuild Co LtdMitsui Zosen Aquapex Corp三井造船アクアペックス株式会社三井造船株式会社
    • SUGIMOTO TOMIOOKADA YASUO
    • C01D3/04C02F1/58C02F1/62
    • PROBLEM TO BE SOLVED: To provide a production system for sodium chloride where, upon refining, the reclamation treatment for the heavy metals to be recovered is made possible, and also, equipment constitution can be simplified.
      SOLUTION: The production system for sodium chloride, where a product produced by adding sodium bicarbonate to a combustion exhaust gas is dissolved in water so as to be refined, is equipped with: a carbonate radical removing means for decomposing away carbonate radicals in the solution; a precipitating means for precipitating sulfate radicals remaining in the solution from which the carbonate radicals are removed; a heavy metal fixing means for adding a chelating agent to the solution and reacting heavy metals and the chelating agent in the solution; a separating-removing means for separating away the precipitates and the heavy metal-chelate compound from the solution; and an evaporating-drying means for evaporating and drying the treatment liquid obtained by removing the precipitates and the chelate compound, so as to separate sodium chloride. The precipitating means is equipped with: a first precipitating means for precipitating the sulfate radicals as calcium sulfate; and a second precipitating means for precipitating the sulfate radicals dissolved in the solution subjected to the precipitating treatment as barium sulfate.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:为了提供氯化钠的生产系统,其中在精炼时,可以使待回收的重金属的回收处理成为可能,并且还可以简化设备结构。 解决方案:将通过向燃烧废气中加入碳酸氢钠而生产的产品溶解在水中以进行精制的氯化钠生产系统配备有:用于分解碳酸根离子的碳酸根自由基 解决方案; 用于沉淀残留在其中除去碳酸根的溶液中的硫酸根的沉淀装置; 用于向溶液中加入螯合剂并使重金属和螯合剂在溶液中反应的重金属固定装置; 用于从溶液中分离析出物和重金属 - 螯合物的分离去除装置; 以及蒸发干燥装置,用于蒸发并干燥通过除去沉淀物和螯合化合物而获得的处理液体,以分离氯化钠。 沉淀装置配备有:硫酸盐沉淀作为硫酸钙的第一沉淀装置; 以及用于使溶解在经过沉淀处理的溶液中的硫酸根沉淀为硫酸钡的第二沉淀装置。 版权所有(C)2007,JPO&INPIT