Apparatus system for processing dilute brine

A shallow saline treatment equipment system belongs to the technical field of the process water treatment, and comprises three cation exchange resin beds which are connected in parallel with each other according to the sequence of the process of water treatment. The system is characterized in that pipelines and valves are adopted to connect the three cation exchange resin beds in series according to the sequence of the back washing regeneration process. The utility model can save an average 3-5% of acid water during the back washing of the cation exchange resin bed, thereby saving the water resources and the cost of acid water treatment.