The invention relates to a method and a
system for recycling the regenerated waste liquid of a
sodium bed. The method comprises the following steps: adding
polymerization ferric chloride or polymeric
ferric sulfate or a polymeric aluminum solution into waste liquid by virtue of waste liquid detection according to needed addition amount, then sequentially adding NaOH or
lime, and then adding Na2CO3, so that
divalent ions Ca<2+> and Mg<2+> in the waste liquid form an aggregate, and the aggregate is subjected to pressure
filtration by virtue of a pressure filter and then is subjected to
solid-liquid separation; and regulating the pH value of a separated pressure filter
clear liquid, supplementing NaCl for the pressure filter
clear liquid, and sequentially performing fine
filtration by virtue of an immersion type ultra-filter to obtain the recyclable regenerated waste liquid of the
sodium bed, wherein the
total calcium-
magnesium amount is smaller than 40mg / L, the SS is smaller than or equal to 0.1mg / L, and the
turbidity is smaller than or equal to 0.1NTU. According to the method and the
system, the
divalent ions in the regenerated waste liquid of the
sodium bed can be effectively removed, the continuity of the treatment process of waste
salt water is realized, each
treatment period is about 8 hours, the zero-emission and the continuous regeneration of the regenerated waste liquid of the sodium bed are realized, and the
system is simple in structure, stable to operate and suitable for industrial application.