METHOD FOR PURIFYING AMMONIA AND AMMONIA PURIFICATION SYSTEM

摘要

The present invention is a method for purifying ammonia and an ammonia purification system with which ammonia can be purified at a high recovery rate by a simple procedure and in a short purification time under low energy consumption. A second partial condenser (3) of an ammonia purification system (100) partially condenses crude ammonia gasified by a first evaporator (2) and separates and removes, as a liquid-phase component, the impurities having low volatility from the crude ammonia. A first partial condenser (5) partially condenses the gas-phase component separated by the second partial condenser (3) and separates and removes, as a gas-phase component, the impurities having high volatility.