Ammonia nitrogen waste water treatment equipment

The invention discloses ammonia nitrogen waste water treatment equipment, comprising a buffer tank, a plate-type preheater and an evaporator heating chamber which are sequentially connected, wherein the evaporator heating chamber is vertically arranged. The ammonia nitrogen waste water treatment equipment also comprises a primary evaporating chamber and a secondary evaporating chamber which are vertically arranged with low interior voltage, a discharging pump and a compressor, the plate-type preheater is connected with a first inlet of the evaporator heating chamber by virtue of a first forced circulation pump, a first outlet corresponding to the first inlet in the evaporator heating chamber is connected with a primary material circulation inlet of the primary evaporating chamber, a material transferring pipeline is connected below the primary evaporating chamber, the other end of the material transferring pipeline is connected with a second forced circulation pump, the second forced circulation pump is conne