Device for treating high-concentration ammonia-nitrogen wastewater containing heavy metals

The utility model discloses a device for treating high-concentration ammonia-nitrogen wastewater containing heavy metals. The device for treating high-concentration ammonia-nitrogen wastewater containing heavy metals comprises a precipitation separation integrated box and an ammonia absorption tower, wherein an ammonia gas outlet and a plurality of dosing holes are formed in the top of the box body; a water inlet is formed in the upper part of the box body; a water outlet is formed in the lower part of the box body; a spraying layer is arranged on the top of the ammonia absorption tower; an ammonia water outlet is formed in the bottom of the ammonia absorption tower; an ammonia gas inlet is formed in the wall, positioned below the spraying layer, of the ammonia absorption tower; the ammonia gas outlet of the precipitation separation integrated box is connected with the ammonia gas inlet of the ammonia absorption tower by virtue of an ammonia gas pipeline. The device integrates high-efficiency denitrification