CN102564063B - The method and apparatus of low temperature air separating - Google Patents

The method and apparatus of low temperature air separating Download PDF

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Publication number
CN102564063B
CN102564063B CN201110349126.6A CN201110349126A CN102564063B CN 102564063 B CN102564063 B CN 102564063B CN 201110349126 A CN201110349126 A CN 201110349126A CN 102564063 B CN102564063 B CN 102564063B
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tower
pressure
liquid
column
lower pressure
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Expired - Fee Related
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CN201110349126.6A
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CN102564063A (en
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A·阿列克谢耶夫
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Linde GmbH
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Linde GmbH
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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
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/04084—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/0423—Subcooling of liquid process streams
    • 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
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04387—Details relating to the work expansion, e.g. process parameter etc. using liquid or hydraulic turbine expansion
    • 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
    • F25J3/04642—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
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
    • F25J3/04727—Producing pure argon, e.g. recovered from a crude argon column using an auxiliary pure argon column for nitrogen rejection
    • 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
    • F25J3/04745—Krypton and/or Xenon
    • 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
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04793—Rectification, e.g. columns; Reboiler-condenser
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
    • F25J2200/94—Details relating to the withdrawal point
    • 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
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/06—Lifting of liquids by gas lift, e.g. "Mammutpumpe"
    • 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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
    • F25J2240/10—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream the fluid being 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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/60—Expansion by ejector or injector, e.g. "Gasstrahlpumpe", "venturi mixing", "jet pumps"

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

At the method and apparatus being used for low temperature air separating (1,5) in the destilling tower system of nitrogen oxygen separating, this distillation column body cording has high-pressure tower (2) and lower pressure column (3), wherein by first fluid (16,17；29) discharge with liquid from high-pressure tower (2) and import (22,23；30) in lower pressure column (3).Use first liquid jet pump (15；28) so that first fluid is delivered to lower pressure column from high-pressure tower.

Description

The method and apparatus of low temperature air separating
Technical field
The present invention relates to the method for low temperature air separating and corresponding equipment.
Background technology
This type of method is frequently designed to double tower process, the most especially lower pressure column is arranged on high pressure Above tower.Alternatively, lower pressure column could be for three towers or the multitower that air separates with high-pressure tower The parts of system.Other can also be set in addition to nitrogen-oxygen separating tower extraly for obtaining height Pure product and/or the device of other constituent of air particularly rare gas, such as, obtain argon and/or obtain Obtain the device of krypton-xenon.
Term " lower pressure column " and " high-pressure tower " typically use with common speech habits at this.This A little terms refer to two arbitrary knockout towers for nitrogen-oxygen separating, wherein the work pressure of high-pressure tower Power is higher than the operating pressure of lower pressure column.In the case of traditional double tower system, it meets common Speech habits.Such as in three tower body systems, " lower pressure column " both can represent the tower with minimum pressure, The tower (so-called intermediate pressure column) of intermediate pressure can also be represented；" high-pressure tower " is to have The tower of high pressure, or the tower of intermediate pressure.
The preferred arrangement of two towers of described double tower is so-called " tower self " arrangement (weight Folded tower), the top of high-pressure tower it is positioned at this lower pressure column.This arrangement mode saves space especially.More have Be worth, in order to by liquid (from the rough oxygen of high-pressure tower bottom, from high-pressure tower top Washing-LIN, the optional extra fluid etc. from high-pressure tower medium position) it is transported to from high-pressure tower Lower pressure column (directly or through argon parts), does not use pump, only by pressure differential (usually, at height Pressure tower is about 6 bars, lower pressure column is about 1.5 bars) conveying liquid.
But (such as have more than 50,000Nm more greatly3The oxygen product of/h or more than 250,000 Nm3The raw air of/h) device in the case of, the size of tower cause this pressure differential be not enough to by Liquid delivers to the height of lower pressure column.In the case, in order to carry liquid, use one or more Extra mechanical pump.
But, the method has serious shortcoming.Due to the nextport hardware component NextPort that this is extra, cause notable Extra cost.Additionally, the availability of whole air-separating plant and reliability rotate due to these And the machine that is the most easily disturbed and have a negative impact；The quantity of the machine rotated is the most, Then cause the probability of this failure of apparatus the highest due to mechanical disorder.Thus can damage overall planning Economy.
Common technical scheme is, is all arranged in double casing by all of pump.Here, only Having a pump properly functioning, second unnecessary machine runs simultaneously (standby in non-loaded mode Run), but can replace immediately when First machine failure and bear required merit Energy.Although This improves availability, but significantly improve the expense of device.
Summary of the invention
Therefore, the present invention is based on the purpose providing the method starting described type, the most reliably Liquid is delivered to lower pressure column from high-pressure tower, and composition has self arrangement of tower in this way Big air separation equipment.
This purpose is by using first liquid jet pump (Fl ü ssigkeitsstrahlpumpe) to incite somebody to action First fluid is delivered to lower pressure column solve from high-pressure tower.
Mechanical pump is replaced also to use liquid jet pump.Use the high-pressure spray (joint existed Stream stream With interior compression stream innenverdichtete ) drive liquid to spray Pump, therefore need not extra mechanical pump.
Liquid jet pump does not include mechanical moving element, the most reliable and durable.Additionally, The cost of liquid jet pump is significantly lower than mechanical pump, this is because this equipment is comparatively simple, only includes A small amount of component, and such as need not motor driving.
In scope of the invention, it is also possible to use two or more liquid jet pumps, with by Two fluids and optionally other fluid are delivered to lower pressure column from high-pressure tower.
Moreover, it relates to the equipment of low temperature air separating.
Accompanying drawing explanation
The present invention and the present invention are explained in more detail below according to shown embodiment in the accompanying drawings Other details.
Detailed description of the invention
The most do not demonstrate air compression plant, air cleaning unit, main heat exchanger and in Pressure turbine, makes a part of raw air from the pressure of high pressure relief to high-pressure tower by it；These Method step is constituted in the usual manner.The gaseous air 1 (GAP) of independent hot interchanger in the future Import and be arranged in the high-pressure tower 2 below lower pressure column 3.Portion of air 43 can be used with heating Rough-krypton-xenon tower in the device 35 for obtaining krypton-xenon.Main condenser 4 i.e. condenses Device-evaporimeter is positioned between the two, connects high-pressure tower by the way of this main condenser is with heat exchange And lower pressure column.
High pressure air flow 5 i.e. Joule-Thomson-air (JL) (JT) is in brighter than high-pressure tower 2 Under aobvious higher pressure, and it is depressurized to about high pressure in choke valve 6 and/or generator turbine 7 The pressure of tower.The high pressure air flow of the most liquid through reducing pressure is in the present embodiment at high-pressure tower And it is allocated between lower pressure column.Part I flow to the medium position of high-pressure tower 2 through pipeline 8. It is to pass through through pipeline 9 and 10 that remainder flow to one or more medium positions of lower pressure column Cold-reverse stream pipe 12 and choke valve 11, or through pipeline 13 and 14, supercooling-reverse stream pipe 12 With first liquid jet pump 15, it plays the effect driving stream of this first liquid jet pump.
The tower bottom liquid body 16 of high-pressure tower 2 is subcooled equally in supercooling-reverse stream pipe 12, and warp Crossing pipeline 17 and flow to first liquid jet pump 15, this first liquid jet pump is caused required Pressure, with the vaporization chamber of the overhead condenser 18 of the height or crude argon column 19 that reach lower pressure column and The height of the vaporization chamber of the overhead condenser 20 of pure argon column 21.At the bottom of high-pressure tower-tower, fraction is here Ground connection delivers to low pressure through steam component 22 or the liquid components 23 from overhead condenser 18,20 The medium position of tower.(as the replacement shown in figure, this first liquid jet pump 15 can be by one Partial high pressure tower-tower bottom liquid body 17 is sent directly in lower pressure column 3；If there is not the device obtaining argon, Fraction at the bottom of the most all of tower is all introduced directly in lower pressure column.)
The liquid nitrogen 24 of the liquefied room from main condenser 4 is caused high pressure in nitrogen pump 25, and And major part flow to the cold end of main heat exchanger through pipeline 26；Make at this evaporation of high pressure-nitrogen or (if this pressure supercritical) pseudo-evaporation, it is heated to environment temperature, and eventually serves as the height of gaseous state Die pressing product and obtain (so-called interior compression).Here, pressure-air 5 is mainly used as thermal source.Institute's pump The driving stream that the remainder 27 sent is used as in second liquid jet pump 28, this second liquid sprays Liquid middle distillate 29,30 from high-pressure tower 2 is sent in lower pressure column 3 by pump according to the present invention. In this embodiment, the stream 27 that drives of second liquid jet pump is under the pressure of 25 bars, and will Main flow is caused 6.5 bars by 5.5 bars.The mole driving stream is about 1/3rd of main flow.Then will The streaming of mixing is to the tower top of lower pressure column.
The device obtaining argon is connected with crude argon column 19 and pure argon column 21 through pipeline 31,32, warp Cross pipeline 33 to be connected with the device 35 being used for obtaining krypton-xenon with 34.
The described equipment following product of discharge or residual gas:
● from the tower top of lower pressure column through supercooling-reverse stream pipe 12 and not purity nitrogen 36 of main heat exchanger
● from the bottom of the tower of lower pressure column 2 near above: liquid oxygen 38 and after flowing through main heat exchanger Through the gaseous oxygen 39 of interior compression in oxygen pump (not shown)
● from the nitrogen through interior compression (seeing description above) of pipeline 26
● liquid nitrogen 40
● from the straight argon 41 at the bottom of the tower of pure argon column 21；A portion can be optionally through pipeline 42 Discharge, and discharge through the main heat exchanger nothing pressure as gaseous state or the product through interior compression
● krypton-xenon concentrate (not shown).

Claims (4)

1. in the destilling tower system of nitrogen oxygen separating, it is being used for low temperature air separating (1,5) Method, this distillation column body cording has high-pressure tower (2) and a lower pressure column (3), wherein by first fluid (16, 17；29) discharge and import lower pressure column (3) with liquid from high-pressure tower (2), it is characterised in that Use first liquid jet pump (15；28) so that first fluid is delivered to lower pressure column from high-pressure tower, High pressure air flow is used as the driving stream of this first liquid jet pump.
Method the most according to claim 1, it is characterised in that by second fluid with liquid from high pressure Tower is discharged and is imported in lower pressure column, wherein use second liquid jet pump with by second fluid from high pressure Tower is delivered in lower pressure column.
3. by the destilling tower system for nitrogen oxygen separating for low temperature air separating (1,5) Equipment, this distillation column body cording has high-pressure tower (2) and lower pressure column (3), and this equipment has for inciting somebody to action First fluid (16,17；29) discharge from high-pressure tower (2) and be conducted into low pressure in liquid form The first conveying device in tower (3), it is characterised in that described first conveying device has the first liquid Body jet pump (15；28).
Equipment the most according to claim 3, this equipment has for by second fluid in liquid form Discharge and be conducted into the second conveying device lower pressure column from high-pressure tower (2), wherein said second Conveying device has second liquid jet pump.
CN201110349126.6A 2010-11-09 2011-11-07 The method and apparatus of low temperature air separating Expired - Fee Related CN102564063B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010050830.6 2010-11-09
DE102010050830 2010-11-09

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CN102564063B true CN102564063B (en) 2016-09-07

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US20160186930A1 (en) * 2014-02-28 2016-06-30 Praxair Technology, Inc. Pressurized product stream delivery

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DE4224068A1 (en) * 1992-03-20 1993-09-23 Linde Ag METHOD FOR DEEP TEMPERATURE DISASSEMBLY OF AIR AND AIR DISASSEMBLY SYSTEM
US6347534B1 (en) * 1999-05-25 2002-02-19 Air Liquide Process And Construction Cryogenic distillation system for air separation
DE10015602A1 (en) * 2000-03-29 2001-10-04 Linde Ag Method and device for obtaining a printed product by low-temperature separation of air
DE10228111A1 (en) * 2002-06-24 2004-01-15 Linde Ag Air separation process and plant with mixing column and krypton-xenon extraction
JP3976188B2 (en) * 2002-12-16 2007-09-12 株式会社神戸製鋼所 Product gas production method using air separation device
CN100424451C (en) * 2006-05-15 2008-10-08 白杨 Super low pressure low temperature method for separating air and making oxygen

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