Device for preparing ultrapure ammonia by purifying ammonia water

The device comprises an ammonia water tank, a preheater, a concentration tower, a buffer tank, a light component removal tower, a heavy component removal tower, a product cooler and a finished product tank, the ammonia water tank is connected with the preheater through a first diaphragm pump; one end of the preheater is connected with the first diaphragm pump, and the other end of the preheater is connected with the concentration tower; a first condenser and a first recovery tank are sequentially arranged on the top of the concentration tower in series; one end of the first recovery tank is connected with the buffer tank; the buffer tank is connected with the light component removal tower through a second diaphragm pump; the bottom of the light component removal tower is connected with the heavy component removal tower; the product cooler is connected with the finished product tank; according to the device, the purpose of preparing the ultra-pure ammonia from the raw material ammonia water is achieved, the en