The present invention discloses a high-purity
ammonia production
system, including: a dilute
ammonia dehydration unit, which includes a feed
buffer tank, a filter, a first
heat exchanger, a
dehydration tower, a second
heat exchanger, a
dehydration buffer tank, an
ammonia concentration
tower, a fourth
heat exchanger, a
liquid ammonia buffer tank, a third heat exchanger, a fifth heat exchanger, and a sixth heat exchanger; a high-purity ammonia purification unit, which includes a seventh heat exchanger, a primary adsorber, a secondary adsorber, a light removal
tower, a heavy removal tower, a ninth heat exchanger, a product
temporary storage tank, a high-purity ammonia product tank, an eighth heat exchanger, a tenth heat exchanger, and an eleventh heat exchanger; and a
tail gas absorption unit, which includes a waste buffer tank, a
tail gas absorption tower, and a twelfth heat exchanger. The present invention first conducts secondary ammonia
evaporation on the
raw material ammonia water before entering the high-purity ammonia purification unit, thereby ensuring the quality stability of subsequent products; then, the deep dehydration of ammonia can be achieved by using the secondary adsorption treatment; finally, the deep
impurity removal can be achieved by using the secondary
distillation, and finally a 7N grade high-purity ammonia product can be obtained.