EP3105520A2 - Säule zur trennung von luft durch kryogene destillation, lufttrennungsvorrichtung mit solch einer säule und verfahren zur herstellung solch einer säule - Google Patents

Säule zur trennung von luft durch kryogene destillation, lufttrennungsvorrichtung mit solch einer säule und verfahren zur herstellung solch einer säule

Info

Publication number
EP3105520A2
EP3105520A2 EP15706916.2A EP15706916A EP3105520A2 EP 3105520 A2 EP3105520 A2 EP 3105520A2 EP 15706916 A EP15706916 A EP 15706916A EP 3105520 A2 EP3105520 A2 EP 3105520A2
Authority
EP
European Patent Office
Prior art keywords
column
section
sections
distillation
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15706916.2A
Other languages
English (en)
French (fr)
Other versions
EP3105520B1 (de
Inventor
Patrice Cavagne
Olivier De Cayeux
Natacha Haik-Beraud
Nathalie Schmitt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Publication of EP3105520A2 publication Critical patent/EP3105520A2/de
Application granted granted Critical
Publication of EP3105520B1 publication Critical patent/EP3105520B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/0403—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04054—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04036—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04042—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of argon or argon enriched stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
    • F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/0489—Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
    • F25J3/04909—Structured packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
    • F25J3/04915—Combinations of different material exchange elements, e.g. within different columns
    • F25J3/04921—Combinations of different material exchange elements, e.g. within different columns within the same column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04969—Retrofitting or revamping of an existing air fractionation unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/10—Mathematical formulae, modeling, plot or curves; Design methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/42—Modularity, pre-fabrication of modules, assembling and erection, horizontal layout, i.e. plot plan, and vertical arrangement of parts of the cryogenic unit, e.g. of the cold box

Definitions

  • the present invention relates to an air separation column by cryogenic distillation, to an air separation apparatus comprising such a column and to a method of manufacturing such a column.
  • An air distillation plant for the production of argon generally consists of a medium pressure column, typically operating at about 6 bar absolute, surmounted by a low pressure column typically operating slightly above atmospheric pressure and which is coupled an impure argon production column.
  • a condenser-vaporizer puts in heat exchange relationship the steam of the head of the medium pressure column, consisting of approximately pure nitrogen, and the bottom liquid of the low pressure column, consisting of approximately pure oxygen.
  • the low pressure column comprises a distillation section, immediately above it, a first intermediate distillation section, and several sections above the first section.
  • intermediate distillation usually between two and three.
  • Each of the distillation sections consists of structured packing blocks of the "cross-corrugated" type.
  • a cross-corrugated packing block consists of a pack of corrugated lamellae each arranged in a general vertical plane and contiguous to each other, each lamella having a generally rectangular shape.
  • the lamellae are corrugated obliquely, and the direction of inclination of the waves is reversed from one lamella to the next. All lamellae have the same height, while their length, or horizontal dimension, increases from a minimum value, for an extreme lamella, to a maximum value for the medial lamella, then decreases to the same minimum value for the lamellae. other extreme lamella.
  • Each of the sections is a continuous lining section, that is to say a section consisting of a direct stack of elementary blocks on top of each other, without any intermediate fluid redistribution device, each elementary block being rotated 90 °, around the axis of the column, with respect to the two adjacent layers.
  • the first intermediate distillation section as described in EP-A-0664144, has a smaller section than the other sections and is therefore in the middle of the low pressure column with an annular section space between the edge of the section and the main ferrule of the column.
  • the column is designed so that the argon-rich vapor can be withdrawn into this annular section space below a slug which divides the space into a lower section and an upper section vertically. This steam then feeds the argon column.
  • the bottom liquid of the argon column is also returned to the lower section from which the richest argon vapor is withdrawn.
  • the vaporized rich liquid from the top condenser of the argon column is sent in the upper section of the space.
  • the first intermediate distillation section is separated from the adjacent sections by distributors.
  • This reduced diameter for this first intermediate distillation section is possible, without increasing the diameter of the column because this section is not dimensioning. Indeed, a large amount of gas passes to the argon column and therefore does not pass through this section.
  • One of the aims of the present invention is to design a low pressure column which is suitable for production with or without argon.
  • the idea is to use a column with first reduced section intermediate distillation section, with or without argon production, and to modify the density of the packing in this section, with a lower density for the case without production of argon and a higher density for the case with argon production.
  • the invention makes it possible to have a standardized model for the low pressure column, with or without production of argon. This also makes it possible to standardize the architecture of the cold box, including the fluid supply lines. The delivery time to the customer can be reduced because it is possible to manufacture the column before deciding on the need for argon production or not.
  • a cryogenic distillation air separation column having a ferrule and at least one four distillation sections, each section being composed of a stack of stacked packing units of the wavy-cross type, each block comprising a pack of rectangular wavy lamellae, at least a first intermediate distillation section of the column being surrounded by an auxiliary shell around which is delimited a space divided into a lower section and an upper section in the direction of the radius of the column, the intermediate section (s) being located in an intermediate part of the column characterized in that the capacity of the first intermediate section is greater than that of at least one adjacent section, or even that of the other sections of the column and that a second and a third intermediate distillation section are arranged so that in use the second section is above the first intermediate section and the third section is above of the second intermediate section and comprising a first opening in the space between the first and the second intermediate section, a second opening in the space between the second and third intermediate section and a third opening in the space above the third section,
  • the column comprises:
  • the lining in the first intermediate section has a density of at least 50 m2 / m3 less than that of at least one of the adjacent sections.
  • the lining in the first intermediate section has a different geometry to that of at least one of the adjacent sections.
  • a air separation comprising a medium pressure column thermally connected to a low pressure column as described above not comprising means for sending a fluid from an intermediate level of the low pressure column to another column to be separated therefrom.
  • a method of manufacturing a column of an air separation apparatus in which a column having a main shell is constructed and several distillation sections are installed, each section being composed of a stack of stacked packing blocks of the wavy-cross type, each block comprising a pack of rectangular wavy lamellae, at least a first intermediate distillation section of the low-pressure column being surrounded by an auxiliary ferrule around which is delimited a space divided into a lower section and an upper section in the direction of the radius of the column, the intermediate section (s) being located (s) in an intermediate portion of the low pressure column characterized in that
  • a packing is installed for the first intermediate section, the packing being chosen so that the capacity of the first intermediate section is greater than that of ) at least one adjacent section, or even to that (s) of the other sections of the column and at least one reflux opening is pierced in the main shell at a point between two adjacent sections, at a level between the first intermediate section and the head of the column and
  • At least one aperture is pierced in the main ferrule allowing access to the lower section and / or the upper section and at least one opening is closed in the case where the column has to make part of a device that does not produce a flow rich in argon.
  • At least one reflux opening is pierced in the main shell at a point between two adjacent sections at a level between the first section and the top of the column and the reflux opening is obstructed if the column is to be part of a device that does not produce a flow rich in argon.
  • At least one reflux opening is pierced in the main shell at a point between two adjacent sections at a level between the first section and the top of the column and the reflux opening is obstructed if the column is to be part of a device producing a flow rich in argon.
  • rich liquid is a term of the art for designating an oxygen enriched liquid with respect to air.
  • FIG. 1 schematically shows a low pressure column of an air distillation apparatus according to the invention adapted for use without argon production
  • FIG. 2 schematically shows a low pressure column of an air distillation apparatus according to the invention adapted for use with argon production
  • the air distillation plant whose low pressure column is shown in Figure 1 consists of a medium pressure column 1, typically operating at about 6 bar absolute, surmounted by the low pressure column 2 typically operating slightly above atmospheric pressure. The absence of any impure or pure argon production column is noted.
  • a condenser-vaporizer 4 connects the overhead steam of the column 1, composed of approximately pure nitrogen, to the heat exchange medium, and the bottom liquid of the column 2, consisting of approximately pure oxygen.
  • Column 1 receives pressurized and purified air to be separated and produces an oxygen enriched liquid flow and a nitrogen enriched liquid flow, both of which are sent to the low pressure column 2.
  • Figure 1 The illustration of Figure 1 is very schematic and is essentially intended to show the fluid inlets / outlets of the installation, as well as the distillation sections that they define.
  • the main shell of the low pressure column 2 comprises six distillation sections, namely:
  • Section 29 • the section of mid naret 29 that has a lower section than the upper disti llation section.
  • the section of the first intermediate distillation section being lower than those of the lower section, the upper section and the second and third intermediate sections.
  • Section 29 is shown in dotted lines because its presence is not essential.
  • the first intermediate portion 25 is a cylindrical body composed of packings surrounded by an auxiliary ferrule of smaller diameter than the ferrule of the column. It is disposed inside the shell of the column and surrounded by an annular section space defined by the ferrule of the column and the auxiliary shell surrounding the packings.
  • An annular sealing member 71 tightly connects the ferrule of the column and the auxiliary shell, and the top of the section 26 is spaced from the distributor 29C by spacers 72.
  • Each of the distillation sections 23 to 29 is constituted by organized packing blocks of the "cross-corrugated" type.
  • a cross-corrugated packing block consists of a pack of corrugated lamellae each arranged in a general vertical plane and contiguous to each other, each lamella having a generally rectangular shape.
  • the lamellae are corrugated obliquely, and the direction of inclination of the waves is reversed from one lamella to the next. All lamellae have the same height, while their length, or horizontal dimension, increases from a minimum value, for an extreme lamella, to a maximum value for the medial lamella, then decreases to the same minimum value for the lamellae. other extreme lamella.
  • Each of the sections 23 to 29 is a section of continuous packing, that is to say a section consisting of a direct stack of layers (in English "packs") elementary on each other, without any device for redistribution of intermediate fluid, each elemental layer being rotated 90 °, about the axis of the column, relative to the two adjacent layers. This is rendered possible, despite the great height of some sections, including sections 23, 24 and 28, which may comprise respectively 40, 38 and 50 theoretical trays, thanks to several features that will appear in the following.
  • Distillation sections 24 and 25, on the one hand, 25 and 26, on the other hand, 26 and 27, 27 and 28, finally 28 and 29, are separated from each other by a distributor.
  • the low pressure column is not intended to be connected to an argon column, it nevertheless contains the reduced section section which is generally used for low pressure columns feeding an argon column.
  • the packings used for the five sections 24 to 28 are identical, the packings used for the first intermediate section 25 are less dense than those of the sections 24, 26, 27. , 28 and possibly 29.
  • the presence of the section 29 is not essential.
  • the decision of the lining capacity to be installed in the first intermediate section can be taken very late, as soon as the decision is made to produce argon or not.
  • the main ferrule and the external connections can be manufactured and only the installation of the section 25 determines the ultimate use that will be made of the column 2.
  • the lining for the section 25 may have a medium density of 350 m 2 / m 3 while the average density of the packings for the sections 24 and 26 will be 500 m 2 / m 3 .
  • the aim is to choose, for the case without argon, a section which has a higher waterlogging limit than for the case with argon.
  • This difference in limit can be obtained by various means, for example by choosing sections made of packings of different geometries, with or without a modified low edge to reduce the resistance to the passage of gases, etc.
  • a rich liquid inlet (liquid enriched in oxygen) is provided. Upstream of the column, the liquid is expanded to partially vaporize and it is a liquid flow 6 and a gas flow 6A that are sent to the space between the two sections.
  • a liquefied air supply is planned. Upstream of the column, the liquid is expanded to partially vaporize and it is a liquid flow 8 and a gas flow 8A that are sent to the space between the two sections.
  • a liquid nitrogen inlet 17 is provided between the upper section 28 and the minaret section 29 (optional).
  • a liquid nitrogen inlet 18 is provided between the upper section 28 and the minaret section 29 (optional). In the absence of a minaret, liquid nitrogen is sent to the top of the column.
  • Figure 1 thus illustrates the standardized column 2 connected to operate as the low pressure column of a double column without argon production.
  • the packings of the section 25 will have the same density as those of the sections 24, 26, 27, 28 and possibly 29 (by example 500 m 2 / m 3 ). However, it will be necessary to provide openings in the column as shown in Figure 2.
  • the inside of the column will therefore be identical to that of FIG. 1 except for the capacity of the section 25.
  • a pipe is connected to the lower section below the barrier 71 to bring an argon-enriched gas. to the argon separation column.
  • the bottom liquid of this column arrives in the lower section via line 21.
  • the rich liquid vaporized in the top condenser of the argon column arrives through line 13 in the upper section.
  • the rich liquid 6 and the vaporized rich liquid 6A arrive between the second and third intermediate sections 26, 27 and the liquefied air 8 and the vaporized liquefied air 8A arrive between the third intermediate section 27 and the section 28.
  • the arrivals of nitrogen are identical to those of Figure 1.
  • openings may be formed between the first and second intermediate sections 25, 26, the second and third intermediate sections 26, 27 and between the third intermediate section 27. and the upper section 28.
  • the column is thus manufactured with openings allowing the subsequent connection of fluid conduits for or coming from the argon column and also those allowing the connection to the medium pressure column in the case of argon production or not.
  • a full flange, or other system will then be used to condemn unused inputs and outputs in the case of argon-free production and to condemn other unused inputs and outputs in the case of argon production.
  • the opening between the first and second intermediate sections 25, 26 will be plugged, the opening between the second and third intermediate sections 26, 27 will allow the arrival of rich liquid and between the third section intermediate 27 and the upper section 28 of liquefied air.
  • the opening between the first and second intermediate sections 25, 26 will allow the arrival of rich liquid
  • the opening between the second and third intermediate sections 26, 27 will allow the arrival of liquefied air
  • the opening between the third intermediate portion 27 and the upper section 28 of air will be clogged.
  • column 2 designed for argon production there are other differences between column 2 designed for argon production and column 2 designed not to produce argon.
  • the type or dimensions of the dispensers may vary from one column to another.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP15706916.2A 2014-02-14 2015-02-13 Säule zur trennung von luft durch kryogene destillation, lufttrennungsvorrichtung mit solch einer säule und verfahren zur herstellung solch einer säule Active EP3105520B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1451166A FR3017698B1 (fr) 2014-02-14 2014-02-14 Colonne de separation d'air par distillation cryogenique, appareil de separation d'air comportant une telle colonne et procede de fabrication d'une telle colonne
PCT/FR2015/050355 WO2015121593A2 (fr) 2014-02-14 2015-02-13 Colonne de séparation d'air par distillation cryogénique, appareil de séparation d'air comportant une telle colonne et procédé de fabrication d'une telle colonne

Publications (2)

Publication Number Publication Date
EP3105520A2 true EP3105520A2 (de) 2016-12-21
EP3105520B1 EP3105520B1 (de) 2022-01-26

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EP15706916.2A Active EP3105520B1 (de) 2014-02-14 2015-02-13 Säule zur trennung von luft durch kryogene destillation, lufttrennungsvorrichtung mit solch einer säule und verfahren zur herstellung solch einer säule

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US (1) US10473392B2 (de)
EP (1) EP3105520B1 (de)
CN (2) CN106211791B (de)
FR (1) FR3017698B1 (de)
WO (2) WO2015121593A2 (de)

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US20220126263A1 (en) * 2019-02-25 2022-04-28 L'air Liquide, Société Anonyme Pour L'etude Et L'exploitation Des Precédés Georges Claude Matrix integrating at least one heat exchange function and one distillation function
FR3123421B1 (fr) * 2021-05-27 2023-07-14 Air Liquide Système de purification d’argon par distillation cryogénique

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US4784677A (en) * 1987-07-16 1988-11-15 The Boc Group, Inc. Process and apparatus for controlling argon column feedstreams
EP0664144A2 (de) * 1990-12-17 1995-07-26 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Luftdistillationskolonne mit einer well-cross Packung
DE4224068A1 (de) * 1992-03-20 1993-09-23 Linde Ag Verfahren zur tieftemperaturzerlegung von luft und luftzerlegungsanlage
US5339648A (en) * 1993-08-05 1994-08-23 Praxair Technology, Inc. Distillation system with partitioned column
CN1091646C (zh) * 1994-10-04 2002-10-02 普莱克斯技术有限公司 用于精炼系统的高容量结构填料
US5946942A (en) * 1998-08-05 1999-09-07 Praxair Technology, Inc. Annular column for cryogenic rectification
US6202441B1 (en) * 1999-05-25 2001-03-20 Air Liquide Process And Construction, Inc. Cryogenic distillation system for air separation
US6240744B1 (en) * 1999-12-13 2001-06-05 Air Products And Chemicals, Inc. Process for distillation of multicomponent fluid and production of an argon-enriched stream from a cryogenic air separation process
FR2814229B1 (fr) * 2000-09-19 2002-10-25 Air Liquide Procede et installation de separation d'air par distillation cryogenique
US6321567B1 (en) * 2000-10-06 2001-11-27 Praxair Technology, Inc. Structured packing system for reduced distillation column height
FR2854579B1 (fr) * 2003-05-09 2005-06-17 Air Liquide Installation de distillation comprenant des colonnes a garnissages structures ondules-croises et procede d'augmentation de capacite d'une installation de distillation
US7204101B2 (en) * 2003-10-06 2007-04-17 Air Liquide Large Industries U.S. Lp Methods and systems for optimizing argon recovery in an air separation unit
US20080185350A1 (en) * 2007-02-05 2008-08-07 Koch-Glitsch, Lp Method and apparatus for separating oil sand particulates from a three-phase stream
CN201221888Y (zh) * 2008-05-06 2009-04-15 核工业西南物理研究院 带氩可变工况上塔

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Also Published As

Publication number Publication date
US20170023296A1 (en) 2017-01-26
CN106211791B (zh) 2019-12-31
US10473392B2 (en) 2019-11-12
CN105992923B (zh) 2019-07-02
CN106211791A (zh) 2016-12-07
EP3105520B1 (de) 2022-01-26
FR3017698A1 (fr) 2015-08-21
WO2015121594A3 (fr) 2015-12-17
FR3017698B1 (fr) 2019-03-29
WO2015121594A4 (fr) 2016-02-04
WO2015121593A3 (fr) 2015-12-17
WO2015121593A2 (fr) 2015-08-20
WO2015121594A2 (fr) 2015-08-20
CN105992923A (zh) 2016-10-05

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