WO2010052437A2 - Installation integree de separation d'air et de chauffage d'eau destinee a une chaudiere - Google Patents

Installation integree de separation d'air et de chauffage d'eau destinee a une chaudiere Download PDF

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Publication number
WO2010052437A2
WO2010052437A2 PCT/FR2009/052145 FR2009052145W WO2010052437A2 WO 2010052437 A2 WO2010052437 A2 WO 2010052437A2 FR 2009052145 W FR2009052145 W FR 2009052145W WO 2010052437 A2 WO2010052437 A2 WO 2010052437A2
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WO
WIPO (PCT)
Prior art keywords
air
exchanger
water
compressor
boiler
Prior art date
Application number
PCT/FR2009/052145
Other languages
English (en)
French (fr)
Other versions
WO2010052437A3 (fr
Inventor
Richard Dubettier-Grenier
Jean-Pierre Tranier
Stephane Gree
Original Assignee
L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude
Siemens Vai Metals Technologies Gmbh & Co
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 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude, Siemens Vai Metals Technologies Gmbh & Co filed Critical L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude
Priority to EP09768157A priority Critical patent/EP2344822A2/fr
Priority to CN200980144751.8A priority patent/CN102209873B/zh
Priority to US13/128,173 priority patent/US20110214452A1/en
Publication of WO2010052437A2 publication Critical patent/WO2010052437A2/fr
Publication of WO2010052437A3 publication Critical patent/WO2010052437A3/fr

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04151Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04163Hot end purification of the feed air
    • F25J3/04169Hot end purification of the feed air by adsorption of the impurities
    • F25J3/04181Regenerating the adsorbents
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00General layout or general methods of operation of complete plants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F01K27/02Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/58Cooling; Heating; Diminishing heat transfer
    • F04D29/582Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/5826Cooling at least part of the working fluid in a heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/02Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04006Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012Providing 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
    • F25J3/04018Providing 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 main feed air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04006Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109Arrangements of compressors and /or their drivers
    • F25J3/04115Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
    • F25J3/04121Steam turbine as the prime mechanical driver
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04151Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04521Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04612Heat exchange integration with process streams, e.g. from the air gas consuming unit
    • F25J3/04618Heat exchange integration with process streams, e.g. from the air gas consuming unit for cooling an air stream fed to the air fractionation unit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04763Start-up or control of the process; Details of the apparatus used
    • F25J3/04769Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812Different modes, i.e. "runs" of operation
    • F25J3/04824Stopping of the process, e.g. defrosting or deriming; Back-up procedures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00Processes or apparatus using other separation and/or other processing means
    • F25J2205/60Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
    • F25J2205/66Regenerating the adsorption vessel, e.g. kind of reactivation gas
    • F25J2205/70Heating the adsorption vessel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/06Adiabatic compressor, i.e. without interstage cooling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00Processes or apparatus involving steps for expanding of process streams
    • F25J2240/70Steam turbine, e.g. used in a Rankine cycle

Definitions

  • the present invention relates to an integrated installation of air separation and water heating for the boiler.
  • WO-A-2006/131283 discloses an apparatus in which air from a compressor is fumes heated and then is used to heat water in two separate exchangers.
  • DE-C-19837251 discloses an integrated air separation apparatus with a gas turbine.
  • the present invention optimizes the heat recovery of an air compressor by preheating boiler feed water.
  • the water fed to a boiler is sent to a degasser to separate the oxygen dissolved therein, typically to reduce its content to less than 10 ppb by direct stripping of the water with steam.
  • this degassification must take place at a pressure below 20 bar, and preferably below 10 bar.
  • a compressor is used to compress all the air intended for a cryogenic air separation apparatus, the air must be produced at typically 6 bar abs and therefore at a temperature of 230 ° C. to 300 ° C. for an adiabatic compressor. .
  • the water for the boiler could be heated to between 220 ° C and 295 ° C (taking into account the fact that a temperature difference of less than 5 ° C would entail significant additional costs).
  • the water must be degassed to remove dissolved oxygen, mainly from the added water to compensate for the losses. (deconcentration, steam extraction, leakage).
  • the pressure must therefore be maintained at a pressure of less than 20 bar.
  • the boiling point of the steam at this pressure being -210 ° C., the boiler water can not be heated to the most optimal temperature in terms of efficiency (it is also necessary to keep a margin of typically 10 ° C.). C between the temperature of the water to be degassed and the temperature of the degasser to allow a good operation of the latter).
  • the water flow to the boiler may be too large compared to air to allow for optimal heat exchange efficiency.
  • the flow ratio between the water intended for the boiler (and coming from the condenser of the turbine) and the air is 380 kg of water for 1000 Nm 3 / h of air.
  • the air leaves the compressor at 273 ° C.
  • the water leaves the condenser at 45 ° C. and the minimum temperature difference in the exchanger where the water is heated against the air is 10 ° C.
  • the water can be heated to 224 ° C while it was desired to obtain a temperature of at least 250 ° C.
  • another source of heat is used to supplement the heat received from the air compressor, in order to increase the temperature of the water intended for the boiler.
  • an integrated installation comprising an air compressor, a steam turbine which drives the air compressor, a first heat exchanger, means for sending water to the first exchanger heat and then to a boiler, means for supplying compressed air from the compressor to the first heat exchanger and an air separation apparatus supplied with compressed air into the compressor, heating means for heating the water downstream of the first exchanger, a second exchanger, means for sending water from the first exchanger to the heating means, heating means to the second exchanger and the second exchanger to the boiler and means for sending air from the compressor to the second exchanger upstream of the first exchanger, without preheating means between the compressor and the second exchanger and the second exchanger to the first exchanger.
  • the compressor air heats the water without having been preheated by fumes as in the prior art.
  • the heating means are constituted by a direct contact heating device.
  • the heater is fed with steam from the boiler.
  • the heater is also used to separate gases dissolved in water.
  • the installation comprises means for pressurizing the water downstream of the first exchanger and upstream of the second exchanger.
  • the installation comprises an air cleaning apparatus upstream of the air separation apparatus, optionally a backup vaporizer of a liquid produced by the air separation apparatus, means for sending air the air from the first heat exchanger to the air cleaning apparatus, means for supplying purified air to the purification apparatus to the air separation apparatus and means for supplying the steam boiler water to a regeneration gas heating exchanger for the purification apparatus and / or the emergency vaporizer and / or an absorption cooling system of the separation apparatus.
  • the installation comprises an air cleaning apparatus, an air separation apparatus, possibly an emergency vaporizer of a liquid produced by the air separation apparatus, means for sending air from the first exchanger to the air cleaning apparatus, means for supplying purified air to the purification apparatus to the air separation apparatus and means for supplying water vapor from heating means to a regeneration gas heating exchanger for the purification apparatus and / or the emergency vaporizer and / or an absorption cooling system of the separation apparatus.
  • the installation comprises an air cleaning apparatus, an air separation apparatus, possibly an emergency vaporizer of a liquid produced by the air separation apparatus, means for sending air from the first exchanger to the air cleaning apparatus, means for supplying purified air into the purification apparatus to the air separation apparatus and means for sending water from the first exchanger to a regeneration gas heating exchanger for the purification apparatus and / or the emergency vaporizer and / or an absorption cooling system of the separation apparatus.
  • the installation comprises means for sending water vapor from the boiler to a steam turbine.
  • the installation comprises means for condensing the steam from the turbine and for sending at least a portion of the water thus formed to the first exchanger, a portion possibly being sent to a thermal power plant.
  • the plant comprises means for sending steam from the turbine to a regeneration gas heating exchanger for a purification apparatus of the air separation apparatus.
  • the compressor is an adiabatic compressor.
  • the compressor comprises at least one cooling means downstream of a compressor stage.
  • a method of heating water for a boiler in which water is heated in a first heat exchanger by heat exchange with air from a compressor driven by a steam turbine, then the cooled air is sent in this first exchanger to an air separation apparatus, characterized in that the water from the first heat exchanger is heated and is sent to a second exchanger, preferably without having heated, where it exchanges heat with air from the compressor, the air from the compressor has not been preheated between the compressor and the second exchanger, it sends the air cooled in the second exchanger to the first exchanger and the heated water is sent into the second exchanger in the boiler.
  • the air compressor produces air at a first pressure and the air is sent to the air separation apparatus at that first pressure, without compression downstream of the air compressor.
  • the air compressor produces air at a first pressure and the air is sent to the air separation apparatus at that first pressure, without compression downstream of the air compressor.
  • all air from the air compressor is sent to the air separation apparatus.
  • Figures 1 and 4 illustrate facilities according to the invention and Figures 2 and 3 are Q-T diagrams of an exchanger of the facility.
  • water 27 is extracted from a condenser 23 at 45 ° C and pumped to 15 bar by a pump 25.
  • This pumped water is heated by indirect exchange in a first exchanger 29 to a first temperature at least 100 ° C., preferably at least 130 ° C., or even at least 150 ° C., even at least 170 ° C., for example 175 ° C. in this case.
  • the water recovers heat from the air 35 from an air compressor 31.
  • the compressor can be adiabatic or have cooling means between the stages.
  • the hot water is sent to a degasser 3 which receives steam 5 to 14 bars from a boiler 1.
  • the water is heated from its first temperature to 196 ° C and oxygen dissolved is removed by stripping.
  • the water 7 at 196 ° C is pumped by the pump 9 to 150 bar forming the flow 11 and sent to a second exchanger 13 where it exchanges heat with air 33 from the air compressor 31. After passage in both exchangers, the air 37 is sent to an air separation apparatus, to be illustrated further in FIG. 4.
  • the flow of water at high pressure 15 is sent to the boiler 1.
  • the steam 19 from the boiler 1 is sent to a steam turbine 17 which drives the air compressor 31.
  • the steam 21 is then sent at the condenser 23.
  • the air is not compressed between the outlet of the compressor 31 and the inlet of the air separation device 49.
  • FIG 2 illustrates the heat exchange in the two heat exchangers 13,29. This configuration allows good use of heat from the compressor and efficient degassing at medium pressure. In order to optimize the exchange diagram (and make the lines of the graph as parallel as possible) to that of Figure 3, it is recommended to send some of the condensed water after the steam turbine 17 from the air separation unit to the preheating system of the power plant ("power plant" in English), not to preheating by exchange with hot air.
  • Figure 4 illustrates a version of Figure 1 showing in more detail the air separation apparatus.
  • the air 37 from the compressor 31 is sent to a purification apparatus 41 and then to a cryogenic distillation air separation apparatus 49.
  • a liquid product of the separation apparatus 49 is sometimes vaporized in a backup vaporizer 51.
  • the purification apparatus is regenerated by a nitrogen flow 43 from the air separation apparatus 49.
  • This nitrogen flow can be preheated by steam from the boiler 1 and / or by water vapor 55 from the degasser 3 and / or purges of the boiler.
  • Preferably the water vapor coming from the boiler 1 is a fraction of the flow rate 5 intended for the degasser 3.
  • a portion 57 of the water heated in the first exchanger 29 to about 150 0 C can heat the regeneration nitrogen 43.
  • This water can be withdrawn continuously and stored in a thermally insulated storage (not shown) and sent punctually to heat the regeneration nitrogen.
  • Water vapor 53 from the degasser 3 may be used to vaporize a cryogenic liquid from the air separation apparatus in a backup vaporizer 51.
  • Part of the water vapor 5 and / or water 57 and / or water vapor 45 and / or water vapor 55 can also be used for heating a refrigeration unit with absorption of water.
  • the air separation apparatus 49 No compression means compresses the air between the air compressor 31 and the air separation apparatus 49 and all air from the air compressor 31 is sent to the air separation apparatus 49.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Physical Water Treatments (AREA)
  • Air Supply (AREA)
PCT/FR2009/052145 2008-11-10 2009-11-06 Installation integree de separation d'air et de chauffage d'eau destinee a une chaudiere WO2010052437A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09768157A EP2344822A2 (fr) 2008-11-10 2009-11-06 Installation integree de separation d'air et de chauffage d'eau destinee a une chaudiere
CN200980144751.8A CN102209873B (zh) 2008-11-10 2009-11-06 用于锅炉的空气分离和水加热集成设备
US13/128,173 US20110214452A1 (en) 2008-11-10 2009-11-06 Integrated Air-Separating And Water-Heating Apparatus Intended For A Boiler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0857631 2008-11-10
FR0857631A FR2938320B1 (fr) 2008-11-10 2008-11-10 Installation integree de separation d'air et de chauffage d'eau destinee a une chaudiere

Publications (2)

Publication Number Publication Date
WO2010052437A2 true WO2010052437A2 (fr) 2010-05-14
WO2010052437A3 WO2010052437A3 (fr) 2011-06-03

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PCT/FR2009/052145 WO2010052437A2 (fr) 2008-11-10 2009-11-06 Installation integree de separation d'air et de chauffage d'eau destinee a une chaudiere

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Country Link
US (1) US20110214452A1 (ko)
EP (1) EP2344822A2 (ko)
KR (1) KR20110086591A (ko)
CN (1) CN102209873B (ko)
FR (1) FR2938320B1 (ko)
WO (1) WO2010052437A2 (ko)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012001606A1 (de) 2012-01-26 2013-08-01 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Luftzerlegung und Dampferzeugung in einem kombinierten System
DE102012004048A1 (de) 2012-03-02 2013-09-05 Linde Ag Verfahren und Vorrichtung zur Luftzerlegung und Dampferzeugung in einem kombinierten System
WO2011110775A3 (fr) * 2010-03-09 2015-07-09 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procede et appareil integres de separation d'air et de chauffage d'un gaz de l'air provenant d'un appareil de separation d'air
US9435229B2 (en) 2012-01-26 2016-09-06 Linde Ag Process and device for air separation and steam generation in a combined system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2984474A1 (fr) * 2011-12-16 2013-06-21 Air Liquide Procede et appareil de separation d'air par distillation cryogenique
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CN102209873B (zh) 2014-02-26
FR2938320B1 (fr) 2013-03-15
CN102209873A (zh) 2011-10-05
EP2344822A2 (fr) 2011-07-20
FR2938320A1 (fr) 2010-05-14
US20110214452A1 (en) 2011-09-08
KR20110086591A (ko) 2011-07-28

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