Device and process for treating mine ammonia-nitrogen wastewater by serial parallel graded adsorption and reverse osmosis

The invention discloses a device and a process for treating mine ammonia-nitrogen wastewater by serial parallel graded adsorption and reverse osmosis. The device comprises a graded adsorption system,a wastewater adjusting system and a reverse osmosis system; the graded adsorption system comprises a main water inlet pipe (10) and first to fourth stages of activated carbon adsorption columns whichare sequentially connected in series; the wastewater regulating system comprises a regulating tank (5) and a security filter (6), and the reverse osmosis system comprises a reverse osmosis membrane assembly (7), a filtered water collecting tank (8), a backwashing device and a treated water discharge pipe (81); cyclic treatment of the ionic rare earth mine wastewater with large ammonia nitrogen concentration span is realized by utilizing the adsorption effect of the four-stage camellia oleifera shell activated carbon and the separation effect of the reverse osmosis system; the device is easy todisassemble and carry, and