Method for removing inert gas from liquid ammonia
AssigneesThyssenkrupp Uhde GmbH, thyssenkrupp AG
InventorKlaus Nölker
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Abstract
A method of removing inert gas dissolved in liquid ammonia involves evaporating, compressing, and then condensing the liquid ammonia together with the inert gas dissolved therein. Thereby, a product stream of warm liquid ammonia that has been freed of the inert gas is obtained, which is under elevated pressure relative to standard pressure and hence suitable for immediate use in methods in which pure liquid pressurized ammonia is required. If, by contrast, the ammonia is cooled first, for example, below the boiling temperature for ammonia and expanded to standard pressure to store it in tanks as liquid ammonia at low temperatures, it is necessary first to reheat and compress it for further processing operations. Thus the disclosed methods lead to significant energy savings.
Claims14
A method of removing inert gas dissolved in liquid ammonia, the method comprising delivering the liquid ammonia through a first conduit that branches into a first substream and a second substream, wherein the first substream sequentially undergoes evaporating at an evaporator, compressing at a compressor, and then condensing at a condenser causing the inert gas dissolved therein to escape from the liquid ammonia in the first substream at the condenser, wherein the second substream is expanded to a pressure in which gasses dissolved in the second substream are outgassed.
Dependencies are inferred from the claim text.