C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
23/172, 23/390
C02F 1/58 (2006.01)
Patent
CA 1282223
ABSTRACT The brine purifying system employs a multistage filtering apparatus comprising a plurality of the same filter units piled up one over another to form a plurality of cascaded filtering stages. When the filter layers of the filter units are clogged with unsoluble matters, the operation of the multistage filtering apparatus is inter- rupted, then a solvent for the unsoluble matters is cir- culated through the multistage filtering apparatus to remove the unsoluble matters arrested by the filter layers by dissolving the same therein. Then, a washing liquid is circulated through the multistage filtering apparatus to wash the multistage filtering apparatus completely. The solvent and the washing liquid used for regenerating and washing the multistage filtering apparatus are recovered and are used for dissolving salt to prepare saturated brine. The unsoluble matters thus removed from the filter layers are removed by being precipitated in a precipitating tank.
499704
Hina Fumio
Yagishita Aisaburo
Kabushiki Kaisha Sanshin Seisakusho
Robic Robic & Associes/associates
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