High-temperature dehydration, low-temperature sulfur fixation
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The ammonia stream is extracted from the stripping unit; there are three ammonia liquid separation tanks. The three-stage separation process is referred to as \"high-temperature dehydration and low-temperature sulfur fixation\". What does high-temperature dehydration mean? The ammonia gas coming from the side line is cooled in a cooler. Is it true that the higher the temperature of the cooled ammonia gas, the easier it is to remove the moisture from it? I don’t quite understand it. Please, experts, explain it to me. Thank you; I’ll give extra points, many thanks
High-temperature dehydration should refer to the purification of ammonia by taking advantage of the different volatilities of ammonia and water, while low-temperature sulfur fixation involves reacting gaseous liquid ammonia with hydrogen sulfide, as crystallization occurs more easily at low temperatures. Remove after dissolving in water.
It can’t be liquid ammonia, right? Liquid ammonia doesn’t form at this temperature. It should be ammonia gas reacting with water; hydrogen sulfide dissolves more easily in that mixture. I learned this just yesterday, so it might not be correct
Yes, it’s just liquid ammonia that, after vaporization, reacts with hydrogen sulfide to form ammonium salts which dissolve in water.