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1. WO2016025063 - AIR SEPARATION METHOD AND APPARATUS

Publication Number WO/2016/025063
Publication Date 18.02.2016
International Application No. PCT/US2015/035260
International Filing Date 11.06.2015
IPC
F25J 3/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT
3Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
CPC
F25J 2215/54
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
2215Processes characterised by the type or other details of the product stream
50Oxygen or special cases, e.g. isotope-mixtures or low purity O2
54Oxygen production with multiple pressure O2
F25J 2240/46
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
2240Processes or apparatus involving steps for expanding of process streams
40Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
46the fluid being oxygen
F25J 3/04084
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04006Providing pressurised feed air or process streams within or from the air fractionation unit
04078providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
04084of nitrogen
F25J 3/0409
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04006Providing pressurised feed air or process streams within or from the air fractionation unit
04078providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
0409of oxygen
F25J 3/04175
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04151Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
04163Hot end purification of the feed air
04169by adsorption of the impurities
04175at a pressure of substantially more than the highest pressure column
F25J 3/04296
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04248Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
04284using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
0429of feed air, e.g. used as waste or product air or expanded into an auxiliary column
04296Claude expansion, i.e. expanded into the main or high pressure column
Applicants
  • PRAXAIR TECHNOLGY, INC. [US]/[US]
Inventors
  • XU, Zhengrong
  • PROSSER, Neil, M.
  • LUO, Yang
Agents
  • HAMPSCH, Robert, J.
Priority Data
14/444,43828.07.2014US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) AIR SEPARATION METHOD AND APPARATUS
(FR) PROCÉDÉ DE SÉPARATION D'AIR ET APPAREIL ASSOCIÉ
Abstract
(EN)
A method and apparatus for separating air by cryogenic rectification in which cooled, compressed and purified air is separated in a distillation column system (18) having higher (62) and lower pressure (60) columns operatively associated with one another in a heat transfer relationship (74) to produce an oxygen-rich liquid stream from the lower pressure column. The oxygen-rich liquid stream (128) is pumped and heated through indirect heat exchange (17) with a compressed heat exchange stream (30) to form a pressurized oxygen product stream (151). Part of the air is sequentially and successively compressed in booster compressors (34,40) driven by turboexpanders (38,32) to form the compressed heat exchange stream (30) while other parts of the air (22,24) are expanded in the turboexpanders (38,42) driving the booster compressors (34,40) to form exhaust streams (56,58) that are introduced into both the higher and lower pressure columns to generate refrigeration.
(FR)
Procédé et appareil de séparation d'air par rectification cryogénique dans lequel de l'air comprimé et purifié est séparé dans un système de colonnes de distillation (18) possédant des colonnes à pression élevée (62) et basse (60) fonctionnellement associées entre elles par transfert de chaleur (74) pour produire un flux liquide riche en oxygène de la colonne basse pression. Le flux liquide riche en oxygène (128) est pompé et chauffé par échange de chaleur indirect (17) avec un courant d'échange de chaleur comprimé (30) pour former un flux de produit d'oxygène sous pression (151). Une partie de l'air est séquentiellement et successivement comprimée dans des compresseurs de suralimentation (34,40) entraînés par des turbodétendeurs (38,32) pour former un courant d'échange de chaleur comprimé (30) tandis que d'autres portions d'air (22,24) sont détendues dans des turbodétendeurs (38,42) entraînant les compresseurs de suralimentation (34,40) pour former des flux d'échappement (56,58) introduits à la fois dans des colonnes haute et basse pression pour générer une réfrigération.
Also published as
Latest bibliographic data on file with the International Bureau