| 摘要 |
Provided is an ammonia purification system which can prevent large variations in purity of the final refined ammonia. In this ammonia purification system (100), a control unit (2) controls a raw material storage tank (1) such that if, in the raw material storage tank (1), the volume ratio of the liquid phase to the total volume of the internal space is greater than or equal to a preset threshold value, then crude ammonia is delivered from the liquid phase, and if said volume ratio is less than said threshold value, then the crude ammonia is delivered from the gas phase. Further, an adsorption unit (4) delivers either the gaseous crude ammonia taken from the gas phase of the raw material storage tank (1), or the gaseous ammonia obtained by adsorbing with an adsorbent and removing impurities contained in the gaseous ammonia delivered from a vaporizer (3). |
