Ammonia vapor generation
AssigneesL'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude, Air Liquide America Corporation
InventorDouglas B. Nurmi
Life of this patent
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Abstract
A system for ammonia vapor generation includes a liquid ammonia supply source, a vapor generation tank including an inlet to receive liquid ammonia from the supply source and an outlet to discharge ammonia gas from the vapor generation tank, a first heat transfer system to cool liquid ammonia fed from the supply source to the vapor generation tank and to provide external cooling to the vapor generation tank, and a second heat transfer system to heat liquid ammonia within the vapor generation tank. The first and second heat transfer systems facilitate the discharge of ammonia gas from the vapor generation tank at a substantially constant flow rate and pressure.
Claims35
An ammonia vapor generation system comprising:
- a liquid ammonia supply source;
- a vapor generation tank including an inlet to receive liquid ammonia from the supply source and an outlet to discharge ammonia gas from the vapor generation tank;
- a first heat transfer system to cool liquid ammonia fed from the supply source to the vapor generation tank and to provide external cooling to the vapor generation tank;
- and
- a second heat transfer system to heat liquid ammonia within the vapor generation tank;
- wherein the first and second heat transfer systems facilitate the discharge of ammonia gas from the vapor generation tank at a substantially constant flow rate.
A method for generating ammonia vapor utilizing a system including a liquid ammonia supply source, a vapor generation tank, a first heat transfer system and a second heat transfer system, the method comprising:
- providing liquid ammonia at a substantially constant flow rate from the supply source to the vapor generation tank to facilitate the generation of ammonia gas within the vapor generation tank;
- cooling the liquid ammonia to a selected temperature via the first heat transfer system prior to the liquid ammonia entering the vapor generation tank;
- externally cooling the vapor generation tank via the first heat transfer system for at least a first time period after initiation of system operation so as to substantially maintain the liquid ammonia within the vapor generation tank at the selected temperature;
- and
- heating the liquid ammonia within the vapor generation tank via the second heat transfer system after the first time period so as to substantially maintain the liquid ammonia within the vapor generation tank during generation of ammonia gas;
- and
- discharging ammonia gas from the vapor generation tank at a substantially constant flow rate.
Dependencies are inferred from the claim text.