Recycling device for RO strong brine

The utility model relates to a recycling device for RO strong brine, and belongs to the technical field of chemical industry. The system comprises: a cation impurity removing device, which is used forremoving cation impurities from concentrated water obtained after reverse osmosis filtration treatment of power plant circulating water by using a precipitation method; the separation membrane deviceis used for filtering and removing precipitates obtained in the cation impurity removal device; the ion exchange resin column is used for carrying out ion exchange impurity removal cation treatment on the filtrate obtained by the separation membrane device; the organic membrane is used for filtering produced water obtained by the ion exchange resin column; and the ionic membrane electrolytic cellis connected to the permeation side of the organic membrane and is used for carrying out ionic membrane electrolysis treatment on the purified saline water obtained by the organic membrane. The RO strong brine recycling method