Regenerating Heat Exchanger Patents (Class 62/638)
  • Patent number: 10767923
    Abstract: Device and method for purifying a gas mixture to produce a concentrated gas, notably neon, starting from a mixture comprising neon, said device including, in a cold box housing a cryogenic purification circuit comprising, in series, at least one unit for purifying the mixture by cryogenic adsorption at a temperature between 65K and 100K and notably 65K, then a unit for cooling the mixture to a temperature between 25 and 65 K and then a unit for cryogenic distillation of the mixture to produce the concentrated liquid at the outlet of the cryogenic distillation unit, characterized in that the unit for cooling the mixture to a temperature between 25 and 65 K comprises at least one cryocooler that extracts thermal power from the mixture via a heat exchanger.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: September 8, 2020
    Assignee: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
    Inventors: Pierre Barjhoux, Camille Bouvier, Fabien Durand, Martin Staempflin, Golo Zick
  • Patent number: 10724793
    Abstract: Methods and systems of the current invention separate condensable vapors such as carbon dioxide from light gases or liquids in a mixed process stream. The separation is carried out in a cryogenic process using one or more external cooling loops (ECLs) that first cool down a mixed process stream containing condensable vapors and light gases or liquids, causing the condensable vapors to desublimate and form solids. Next, the solids are separated from the light gases or liquids, forming a solid stream and a light gas or liquid stream. Then the refrigerants of the ECL are cooled by warming the separated solid stream and light gas or liquid stream, efficiently recovering energy used in cooling and desublimating the condensable vapors.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: July 28, 2020
    Assignee: Hall Labs LLC
    Inventor: Larry L. Baxter
  • Patent number: 8534093
    Abstract: A unit for an ejector-type refrigeration cycle includes an ejector, first and second evaporators connected in parallel to a downstream side of the ejector and configured to evaporate the refrigerant discharged from the outlet of the ejector, and a refrigerant distributor configured to distribute the refrigerant discharged from an outlet of the ejector to a side of the first evaporator and a side of the second evaporator. The ejector draws refrigerant from a refrigerant suction port by a high-velocity refrigerant flow jetted from a nozzle portion, and mixes the refrigerant injected from the nozzle portion with the refrigerant drawn from the refrigerant suction port so as to discharge the mixed refrigerant from the outlet of the ejector. The ejector and the refrigerant distributor are connected to each other such that the refrigerant discharged from the outlet of the ejector directly flows into the refrigerant distributor.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: September 17, 2013
    Assignee: Denso Corporation
    Inventors: Takayuki Sugiura, Hirotsugu Takeuchi
  • Publication number: 20110107791
    Abstract: An apparatus for recovery of solids from a vapor, the apparatus including: a vessel comprising a cylindrical portion on top of an angled portion; a vapor inlet located in the cylindrical portion for introducing a solid-vapor mixture tangentially to the cylindrical portion; at least one inlet nozzle disposed in a top of the vessel for spraying a hydrocarbon fluid into the vessel; an indirect heat exchange device disposed concentrically within the cylindrical portion, thereby providing an annulus for vapor and hydrocarbon flow; a heat exchange device disposed at an exterior of the angled portion; an outlet located at a bottom of the angled portion to recover the vapor having a reduced solids content and a solid-hydrocarbon mixture. Also disclosed are processes to clean an oil vapor using such an apparatus.
    Type: Application
    Filed: July 14, 2009
    Publication date: May 12, 2011
    Applicant: M-I LLC
    Inventor: Richard Bingham
  • Patent number: 6343488
    Abstract: The invention relates to a method and a device for separating a gas component in a gas mixture by freezing. The gas component to be separated has the lower vapor pressure when compared with the other gas components in the gas mixture. A working temperature is chosen at which the gas components to be separated freezes out almost completely. The partial pressure of the other gas components at working temperature is kept lower than the vapor temperature of the other gas components at working temperature. Once the components to be separated have been frozen out, the other gases are evacuated. The device comprises at least two cooling tanks. Means are provided to alternately feed the gas mixture to the cooling tanks so that a predetermined partial pressure arises in each tank.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: February 5, 2002
    Assignee: Forschungszentrum Julich GmbH
    Inventor: Helmut Hackfort
  • Patent number: 5799509
    Abstract: An apparatus and method for recovering one or more components from the vapor feed in which the component is recovered from the vapor feed at a lower pressure within a lower pressure cold trap. Thereafter, a higher pressure cold trap is connected to the lower pressure cold trap and the component revaporizes in the lower pressure cold trap and resolidifies in the higher pressure cold trap. The higher pressure cold trap is then isolated and the component is allowed to thaw to build up a vapor pressure such that the component can be delivered for recovery at a high pressure. Two or more components having higher and lower boiling points can be recovered by low pressure cold traps set in series. Low pressure cold traps can be provided to operate in an out of phase relationship so that components are frozen on one set of lower pressure cold traps while being vaporized from the other set of cold traps.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: September 1, 1998
    Assignee: The BOC Group, Inc.
    Inventors: Steven J. Finley, Piotr J. Sadkowski, Atul M. Athalye
  • Patent number: 5533338
    Abstract: A process and system for removing condensable vapors contained within the gas stream in accordance with the process and system, condensable vapors contained within the gas stream are condensed within one or more condensers through indirect heat exchange of the gas stream with a refrigerant stream. This produces a refrigerated gas stream and a heated refrigerant gas stream. Further heat is exchanged from at least part of the heated refrigerant stream to the refrigerated gas stream and in economizing heat exchanger to form a cooled refrigerant stream from the heated refrigerant stream. The refrigeration stream is produced by combining a cryogenic stream with the at least part of the cooled refrigerant stream in a mixing chamber of an ejector or analogous equipment.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: July 9, 1996
    Assignee: The BOC Group, Inc.
    Inventors: Ron C. Lee, Michael D. Heil, Michael T. Downey, Michael J. Barrasso