摘要:
The method of the invention includes cooling an inlet stream (72) within an upstream heat exchanger (28). The method includes feeding the cooled inlet stream (76) into a fractioning column (50) and collecting the denitrogenated hydrocarbon stream at the bottom of the column (50). The method includes feeding a nitrogen-rich stream (106) from the head of the column (50) into a disengager (60) and collecting the gaseous head stream from the disengager (60) in order to form the helium-rich stream (20). The liquid stream (110) from the base of the first disengager (60) is separated into a liquid nitrogen stream (18) and into a first reflux stream (114) that is fed as a reflux into the head of the fractioning column (50).
摘要:
Obtaining inert gas by means of decomposition of air involves great efforts and low yields due to the low inert gas content of air. According to the invention the production of inert gas from a gas mixture is improved in that a process step for the enriching of the gas flow intended for decomposition, the gas flow having a partial gas flow containing inert gas, is introduced to the decomposition of the gas. The partial gas flow can be, for example, a process gas rich in inert gas, or a gas that has been charged with inert gas during the course of a process. By means of the invention the inert gas content is increased in a gas flow supplied to an air decomposition system, thus improving the yield of inert gases during air decomposition.
摘要:
A counter flow heat exchanger comprising a central low pressure return tube deformed intermediate its ends to enhance heat transfer capability wrapped by a high pressure tube to conduct fluid to an expansion device. Also disclosed are a method of increasing the heat transfer capacity of a tube bundle heat exchanger and a liquid helium temperature refrigerator or a reliquefier utilizing the heat exchanger.
摘要:
A low-temperature device for separating and purifying gas based on a small-sized low-temperature refrigerating machine includes a primary heat exchanger, a secondary heat exchanger, a quaternary heat exchanger, at least one small-sized low-temperature refrigerating machine, and at least one liquid collecting tank. The small-sized low-temperature refrigerating machine includes a first cold head and a second cold head, the secondary heat exchanger is provided on the first cold head to form a primary cold head heat exchanger, the quaternary heat exchanger is provided on the second cold head to form a secondary cold head heat exchanger, a mixed gas outlet is connected to an inlet of the primary cold head heat exchanger, an outlet of the primary cold head heat exchanger is connected to an inlet of the liquid collecting tank, and a gas outlet of the liquid collecting tank is connected to an inlet of the secondary cold head heat exchanger. By using primary and secondary cold heads of the small-sized low-temperature refrigerating machine as cold sources, gases having different condensing temperature are liquefied and solidified separately, accordingly a high-purity gas having a lower condensing temperature is obtained, and two or more gases can be separated and purified at a lower cost.
摘要:
This invention relates to a circulation type liquid helium recondensation device with a contaminant-purging function capable of vaporizing and removing contaminants deposited on the refiner in the device. Helium gas vaporizing in the liquid helium storage tank (2) is pumped by the circulating pump (7) and refined in the refiner (6A,6B). The refiner is provided with heaters and also a discharge circuit on the inflow side. The vaporized contaminants generated when the refiner (6A,6B) is heated by the heaters are pumped by the circulating pump (7) or the dedicated purge pump (8) and vented to the atmosphere via said discharge circuit.
摘要:
Das Verfahren und die Vorrichtung dienen zur Gewinnung eines Helium-Neon-Konzentrats aus Luft in einer Luftzerlegungsanlage. Die Luftzerlegungsanlage weist ein Destilliersäulen-System zur Stickstoff-Sauerstoff-Trennung mit mindestens einer ersten Trennsäule und eine Helium-Neon-Säule (2) auf. Einsatzluft wird in das Destilliersäulen-System zur Stickstoff-Sauerstoff-Trennung eingeleitet. Ein stickstoffreicher Strom (1) aus dem Destilliersäulen-System zur Stickstoff-Sauerstoff-Trennung wird der Helium-Neon-Säule (2) zugeleitet. Eine Kopffraktion (4) wird aus dem oberen Bereich der Helium-Neon-Säule (2) entnommen. Aus der Kopffraktion (4) wird ein Produktstrom (22) abgeleitet, der als Helium-Neon-Konzentrat (24) gewonnen wird. Hierbei wird aus der Kopffraktion (4) zunächst ein Vorproduktstrom (13, 15) abgeleitet. Der Vorproduktstrom (15) wird auf einen ersten erhöhten Druck verdichtet (16), der höher als der Betriebsdruck der Helium-Neon-Säule (2) ist. Der Vorproduktstrom (20) wird unter dem ersten erhöhten Druck partiell kondensiert (9) und anschließend einer Phasentrennung (21) unterworfen. Mindestens ein Teil des bei der partiellen Kondensation gasförmig verbliebenen Anteils des Vorproduktstroms wird als Produktstrom (22) aus der Phasentrennung (21) abgezogen und schließlich als Helium-Neon-Konzentrat (24) gewonnen.
摘要:
This invention relates to a circulation type liquid helium recondensation device with a contaminant-purging function capable of vaporizing and removing contaminants deposited on the refiner in the device. Helium gas vaporizing in the liquid helium storage tank 2 is pumped by the circulating pump 7 and refined in the refiner 6. The refiner is provided with heaters and also a discharge circuit on the inflow side. The vaporized contaminants generated when the refiner 6 is heated by the heaters are pumped by the circulating pump 7 or the dedicated purge pump 8 and vented to the atmosphere via said discharge circuit.
摘要:
The invention concerns a method for purifying a cryogenic fluid selected from the group formed by helium, hydrogen, deuterium, argon, neon, xenon or krypton in liquid state, diphase, gaseous or supercritical, having a boiling point Pe, in one at least of its impurities having a boiling point Pe', with Pe' > Pe, comprising at least: a step of filtering at least one impurity in solid state using a mechanical filter; and a step of adsorption of at least one impurity in liquid or gaseous state; and in which at least part of the cryogenic fluid at least partially purified is recuperated, said fluid containing not more than 1 ppb of impurities. The invention also concerns a device for implementing the method.