Method for removing inorganic salt in mannose mother liquor by using ion resin

The invention belongs to the technical field of water treatment, and relates to a method for removing inorganic salt in mannose mother liquor by using ion resin. The method comprises the following steps: enabling mannose mother liquor to pass through an anion and cation resin tank at the flow speed of 350-400m /h, and performing combined cyclic regeneration onanion and cation resins through a carbon dioxide dissolving solution; meanwhile, pre-treating the raw water by a first cation resin tank; stopping water feeding, and performing combined cyclic regeneration on anion and cation resins by using the carbon dioxide dissolving solution; carrying out deep regeneration on the anion resin by using a sodium bicarbonate solution, mixing a regenerated solvent storage tank with water in a water storage tank, performing treating, and enabling the mixed material to enter the water storage tank; and enabling water in the water storage tank to pass through a first cation resin tank, an anion resin tank and a second catio