CN102149998A - 空气分离制冷供应方法 - Google Patents

空气分离制冷供应方法 Download PDF

Info

Publication number
CN102149998A
CN102149998A CN2009801353402A CN200980135340A CN102149998A CN 102149998 A CN102149998 A CN 102149998A CN 2009801353402 A CN2009801353402 A CN 2009801353402A CN 200980135340 A CN200980135340 A CN 200980135340A CN 102149998 A CN102149998 A CN 102149998A
Authority
CN
China
Prior art keywords
stream
air separation
separation equipment
nitrogen
air
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
CN2009801353402A
Other languages
English (en)
Other versions
CN102149998B (zh
Inventor
H.E.霍华德
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.)
Praxair Technology Inc
Original Assignee
Praxair Technology Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41798065&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CN102149998(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Praxair Technology Inc filed Critical Praxair Technology Inc
Publication of CN102149998A publication Critical patent/CN102149998A/zh
Application granted granted Critical
Publication of CN102149998B publication Critical patent/CN102149998B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0234—Integration with a cryogenic air separation 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012—Primary atmospheric gases, e.g. air
    • F25J1/0015—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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0035—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work
    • F25J1/0037—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work of a return 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
    • F25J1/0202—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal refrigeration loop
    • 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
    • F25J3/0409—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 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
    • F25J3/04151—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
    • F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
    • F25J3/04224—Cores associated with a liquefaction or refrigeration cycle
    • 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
    • F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
    • 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
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04296—Claude expansion, i.e. expanded into the main or 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
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04351—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen
    • F25J3/04357—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen and comprising a gas work expansion loop
    • 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.
    • F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work 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
    • F25J3/04763—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
    • F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
    • F25J3/04963—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipment within or downstream of the fractionation unit(s)
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—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
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/04—Internal refrigeration with work-producing gas expansion loop
    • F25J2270/06—Internal refrigeration with work-producing gas expansion loop with multiple gas expansion loops

Landscapes

  • 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)

Abstract

一种向空气分离设施内的空气分离设备供应制冷的方法，其中制冷剂流在集中制冷系统内在低温下被产生。在低温下的制冷剂流被引入到空气分离设备中，使得通过制冷剂流供应空气分离设备的制冷需求的全部或一部分。

Description

空气分离制冷供应方法
技术领域
本发明涉及向空气分离设施内的空气分离设备供应制冷的方法，其中制冷剂在制冷系统内在低温下被产生，且在低温下的制冷剂流被引入到空气分离设备中，使得通过这些制冷剂流供应空气分离设备的制冷需求的全部或一部分。
背景技术
在许多能量相关工程（例如，煤的气化）中，需要很大量的氧气。在一些示例中，需要高达10000至15000公吨每天的氧气。在这个量级下，低温空气蒸馏是氧生成的优选方法。
在低温空气蒸馏中，空气被压缩并且然后净化除掉例如二氧化碳、湿气和烃的较高沸点杂质。得到的压缩且净化的进料流可在主热交换器内冷却至适于其精馏的温度，并接着引入到具有高压塔和低压塔的蒸馏塔单元中。高压塔可通过冷凝器-再沸器热联接到低压塔，所述冷凝器-再沸器可靠近低压塔的底部放置。
该进料在高压塔内被蒸馏，以产生富氮蒸汽塔顶馏分和粗液体氧塔底沉淀物。富氮蒸汽塔顶馏分可在冷凝器-再沸器内冷凝，防止沸腾收集在低压塔底部的富氧液体。得到的富氮液体被用于回流高压塔和低压塔两者。粗液体氧塔底沉淀物被引入到低压塔中，用于进一步提纯。包括第二富氮蒸汽塔顶馏分的氧和氮产物流和另外的富氧液体塔底沉淀物被提取并且可被引入到主热交换器中且被完全加热，以便冷却进入的进料。在与能量相关的应用中，液体含氧流可离开低压塔并且被泵送，以产生加压液体流。然后，加压液体流可在主热交换器内蒸发，以产生在压力下的氧产物。
在大多数低温精馏系统中，必须供应制冷，以便补偿环境热量泄漏，以有利于热交换器操作并且产生液化产物。在低温空气蒸馏中，进料空气在主空气压缩机中被压缩并接着净化。该空气的一部分可进一步被压缩、部分地冷却并接着在涡轮膨胀机内膨胀，以产生至少部分地可引入到高压塔或低压塔中的流，以藉此将制冷施加到设备中。在期望基本压力下的产物比例（例如，氧产物）的情形中，该进料空气的另外部分可被进一步压缩并接着在主热交换器内完全冷却并液化，以蒸发被泵送的液体流。得到的液体流可在液体膨胀机内膨胀，以产生制冷的部分。在其它类型的设备中，含氮流可被部分地加热，然后膨胀以产生制冷。
当设备容量增加时，出现开发采用多条（通常复制）空气分离线（train）的空气分离设施的需求。该工艺复制实现成本更为有效的结构和冷箱运输。每个这种设备将通常采用至少一个处理气体涡轮膨胀，以便产生必要的制冷。径向流入涡轮机通常用于低温空气分离。在这种涡轮机中，这种膨胀机轮的直径与排气的容积率成比例地增加。这导致昂贵的涡轮膨胀机（其必须针对每条线购置）。此外，涡轮膨胀通常受限于操作在适度膨胀比和压力下。结果是，制冷的热力学效率不如本领域可能给定状态的膨胀比那么高。
上述制冷问题（相对于常规设计）组合显著地增加生产氧和氮的成本。本发明通过集成制冷系统并且优选地采用在中央制冷源中的高效制冷/液化特征来解决这些问题。
发明内容
本发明提供一种向空气分离设施中的空气分离设备供应制冷的方法。根据该方法，在制冷系统中产生在低温下的制冷剂。在低温下的制冷剂流被引入到空气分离设备中，使得通过这些制冷剂流供应空气分离设备的制冷需求的全部或一部分。如在本文和权利要求书中所使用的，术语“低温”是指低于大约200 K温度的温度。要注意的是，优选地，低温应当低于150 K。
制冷系统可以是液化器，其通过液化制冷剂来产生在低温下的制冷剂。
该制冷系统可间歇性地操作，使得在操作制冷系统期间，可增加空气分离设备的液体产物。
空气可在空气分离设备中分离，以产生包括富氮蒸汽的产物。富氮蒸汽流可离开所述空气分离设备的至少一个并且在制冷系统中液化以产生在低温下的制冷剂，作为富氮液体。通过将氮液体的富氮液体流引入到空气分离设备中，制冷剂流被引入到空气分离设备中。由此，通过压缩并冷却包含在富氮蒸汽流中的富氮蒸汽的一部分、至少部分地通过在涡轮膨胀机内膨胀该富氮蒸汽的另一部分产生用于冷却的制冷，富氮蒸汽流可在制冷系统中液化。此外，空气可在空气分离单元内的所述空气分离设备的至少第一空气分离设备内被分离，所述空气分离单元包括低压塔和高压塔。富氮蒸汽被产生作为低压塔的塔顶馏分，富氮蒸汽流在所述空气分离设备的所述至少第一空气分离设备的主热交换器内被完全加热。富氮液体流的至少一个被引入到所述空气分离设备的所述至少第一空气分离设备中，作为高压塔的回流。
富氧液体流可被泵送，以产生泵送液体氧气流。该泵送液体氧气流的至少一部分通过与压缩空气流间接热交换而在主热交换器内蒸发或伪蒸发，所述压缩空气流在间接热交换之后被引入到液体膨胀机中并接着引入到高压塔和低压塔的至少一个中，以藉此满足所述空气分离设备的所述至少第一空气分离设备的制冷需求的一部分。
压缩空气流可以是第一压缩空气流。第二压缩空气流可以在主热交换器内部分地冷却并且膨胀，以产生排气流。该排气流被引入到高压塔中，以满足所述空气分离设备的所述至少第一空气分离设备的制冷需求的另一部分。所述富氮液体流的所述至少一个被引入到所述空气分离设备的所述至少第一空气分离设备中，以增加在所述空气分离设备的所述至少第一空气分离设备中的液体产物。
附图说明
虽然本说明书以权利要求书结束，权利要求书清楚地指出了申请人认为是其发明的主题，但是相信的是，结合附图将更好地理解本发明，在附图中：
图1是用于实施根据本发明方法的空气分离设施的示意图；
图2是用于图1的设施中的空气分离设备的示意图；以及
图3是用于结合图1中所示的设施使用的液化器的示意图。
具体实施方式
参考图1，描述了空气分离设施，其包括空气分离设备1和2以及中央制冷系统3。在特别的安装中，富氮流4被用作工作流体并且在中央制冷系统3中液化以产生在低温下的制冷剂流5。制冷剂流5的流6和7在低温下被供给回到空气分离设备1和2，以供应它们制冷需求的全部或一部分。在本文所讨论的具体实施例中，流6和7是通过富氮蒸汽流的液化作用产生的富氮液体流。如此，制冷系统3是在后续讨论中的液化器。要注意的是，本发明并不局限于这种实施例，且其它类型的制冷系统也是可能的，包括具有能够在低温下产生制冷剂介质的闭环制冷系统。
参考图2，描述了空气分离设备1。空气进料流10被引入到空气分离设备1，以将氮与氧分离。空气进料流10在第一压缩机12中被压缩至可以在大约5 bara（绝压）和大约15 bara之间的压力。压缩机12可以是中间冷却一体式齿轮压缩机，其中未示出的冷凝水被移除。
在压缩之后，得到的压缩进料流14被引入到预净化单元16。如本领域已知的预净化单元16通常包含根据变压和/或变温吸附循环操作的氧化铝床和/或分子筛床，在所述循环中吸附湿气和其它较高沸点杂质。如本领域已知的，这种较高沸点杂质通常是二氧化碳、水蒸气和烃。当一个床在操作时，另一床在再生。可使用其它工艺，例如直接接触水冷、基于制冷的冷却、与被冷却水的直接接触以及相分离。
然后，得到的压缩且净化的进料流18被分流为流20和流22。通常，流20占被压缩且净化的进料流18的大约25%和大约35%之间，且如图所示，剩余部分是流22。
接着，流20在压缩机23内被进一步压缩，所述压缩机23也可包括中间冷却一体式齿轮压缩机。第二压缩机23将流20压缩至一定压力，可被压缩到大约25 bar（bara(绝压)）和大约70 bar（bara(绝压)）之间以产生第一压缩流24。之后，第一压缩流24被引入到第一主热交换器25中，在这里其在第一主热交换器25的冷端被冷却。
流22被涡轮装载增压器压缩机26进一步压缩。在优选由后冷却器28移除压缩热量之后，这种流被第二增压器压缩机29进一步压缩至可在从大约20 bar（bara）至大约60 bar（bara）之间的范围内的压力，以产生第二压缩流30。于是，第二压缩流30被引入到第一主热交换器25中，在第一主热交换器25中，该压缩流被部分地冷却至在大约160和大约220开尔文（Kelvin）之间的范围内的温度，并且随后被引入到涡轮膨胀机32中，以产生被引入到空气分离单元50中的排气流34。可以理解的是，流22的压缩可在单个压缩机械中发生。如图所示，涡轮膨胀机32直接联接到或通过合适传动机构联接到第一增压器压缩机26。然而，还可能的是，涡轮膨胀机32联接到发电机，以产生可用于现场或传输至电网的电力。
在第一压缩流24已经在主热交换器25中冷却之后，其在膨胀阀45中膨胀成液体并且分流为液体流46和48，用于最终引入到蒸馏塔单元50。膨胀阀45可用液体膨胀机置换，以产生部分制冷。
进料流10的前述组分（氧和氮）在蒸馏塔单元50内分离，所述蒸馏塔单元50包括高压塔52和低压塔54。要理解的是，如果氩是必要产物，那么可将氩塔结合到蒸馏塔单元50中。高压塔52操作在比低压塔54更高的压力下。由此，低压塔54通常操作在大约1.1至大约1.5 bar（bara）之间的压力下。
高压塔52和低压塔54处于热传递关系，使得从高压塔52的顶部提取的富氮蒸汽塔顶馏分（即，流56）在冷凝器-再沸器57内冷凝，所述冷凝器-再沸器57位于低压塔54的底部中防止富氧液体塔底沉淀物58的沸腾。富氧液体塔底沉淀物58的沸腾在低压塔54内开始形成上升蒸汽相。该冷凝产生液体含氮流60，其被分流为分别回流高压塔52和低压塔54的流62和64，以在这种塔中开始形成下降液体相。
关于高压塔52的回流，除了流62以外，制冷剂的流6在由阀65阀膨胀至合适压力之后被引入到高压塔52中。
排气流34连同液体流46被引入到高压塔52中，用于通过使在传质接触元件66和68内的混合物的上升蒸汽相接触由回流气流62启动的下降液体相而精馏。这产生先前已经被讨论的粗液体氧塔底沉淀物70和富氮塔顶馏分。粗液体氧塔底沉淀物的流72在膨胀阀74中膨胀至低压塔54的压力，并且被引入到这种塔中用于进一步提纯。第二液体流48穿过膨胀阀76、膨胀至低压塔54的压力、并接着引入到低压塔54中。
低压塔54配置有传质接触元件78、80、82、84、85，其可以是塔板、规整填料、散堆填料或本领域已知的其它已知元件。如上所述，该分离产生富氧液体塔底沉淀物58和被提取作为氮产物流86的富氮蒸汽塔顶馏分。此外，废料流88也被提取，以控制氮产物流86的纯度。氮产物流86和废料流88均穿过过冷单元90。过冷单元90过冷回流流64。回流流64的一部分（即，流92）可以可选地作为液体产物，剩余部分93可在经过膨胀阀94减压之后被引入到低压塔54中。
在通过过冷单元90之后，氮产物流86和废料流88在第一主热交换器25内被完全加热，以产生加热的氮产物流95和加热的废料流96。加热的废料流96可用于在预净化单元16内再生吸附剂。氮产物流95的一部分被用作用于中央液化器3内的液化作用的流4。此外，富氧液体流98从低压塔54的底部提取，其包括富氧液体塔底沉淀物58。富氧液体流98可通过泵99泵送，以形成加压含氧流100。加压液体含氧流100的一部分能够可选地用作液体氧产物流102。剩余部分104能够在第一主热交换器25中完全加热并且蒸发以产生在压力下的氧产物流106。
制冷剂的流6将增加液体产物的生成，例如富氧液体流102。空气分离设备2可以是与空气分离设备1相同的设计，制冷剂的流7可按照与制冷剂的流6相同的方式引入到这种设备中。此外，这种空气分离设备2的氮产物流的一部分还可供给到中央制冷系统3中。在这种情况下，设备制冷将通过液体膨胀机（代替膨胀阀45）内的涡轮膨胀机32流24供应，并且将制冷剂的流6引入到高压塔52中。可以理解的是，当期望产生更多的液体产物时，中央制冷系统3可间歇性地操作。另一可能性可在于，设计空气分离设备2，而不存在涡轮膨胀机32和第二增压器压缩机29的涡轮装载增压器配置。在这种情形中，制冷剂的流7会供应空气分离设备2的所有制冷需求。假设膨胀阀45用液体膨胀机置换，那么制冷剂的流7将会供应设备制冷需求的仅一部分。另一可能性在于，将制冷剂的流7引入到第二空气分离设备的主热交换器中。
参考图3，描述了是氮液化器的中央制冷系统3，其中，包含在氮产物流95的部分4中的富氮蒸汽被压缩并冷却以产生液体，用于冷却的制冷通过涡轮膨胀富氮蒸汽的另一部分而产生。虽然存在对于这种液化器来说可能的各种设计，但是在图3所示的具体液化器中，氮产物流95的部分4在进料气体压缩机200中被压缩至在4.8至6.2 bara范围内的压力。然后，再循环流226与流5合并，以形成组合再循环流202。流202在主再循环压缩机204中进一步被压缩至在35至55 bara范围内的压力。压缩机200和204可构成同一机械的一部分、可采用多级中间冷却压缩和/或可以是离心、轴向或主动移位类型的压缩机。
在压缩之后，组合再循环流202于是被细分为热膨胀流206和剩余高压流208。热膨胀流206在涡轮机210中涡轮膨胀至一定压力，所述压力稍微高于流组合再循环流202的压力；并接着被引导至主热交换器212的中间温度位置。
剩余高压流208在主热交换器212中首先被冷却至在其热端和冷端温度之间的中间温度，在大约150 K和大约180 K之间的范围内。之后，冷膨胀流214在涡轮膨胀机216中被提取并膨胀至一定压力，所述压力稍微高于组合再循环流202的压力。然后，该流被引导到主热交换器212的冷端。流208的剩余比例、流216被进一步冷却至低于氮临界温度的温度、优选地至稍微高于制冷剂的流6的饱和蒸汽温度的温度。流216最可能以过冷超临界致密液体状态离开主热交换器212。然后，流216在阀218或在可能地致密相膨胀机中膨胀至中间压力，并且在容器220中相分离。于是，得到的蒸汽相流222与膨胀后的冷膨胀流214结合以形成组合流224。组合流224连同膨胀后的热膨胀流206被加热到环境温度，以形成再循环流226，再循环流226接着再循环到主再循环压缩机204，如上所述。替代性地，流206、214和222可被引导到交换器212中分离且不同的通道中。于是，这种流可在需要时进行组合。
虽然优选地使用液化氮作为制冷传输介质，但是存在其它可能性。例如，用于空气液化的增压空气的一部分可在冷却之后与冷端空气流结合，所述冷端空气流天然地存在于空气分离设备中。此外，可能将制冷传输到诸如混合气体制冷剂的次级制冷剂/冷却剂并接着将其引导至各种空气分离设备中。如果使用这种其它制冷剂流，那么该其它制冷剂流将被引入到主热交换器中的各种空气分离设备中，并且以封闭再循环回路再循环回到制冷系统中。替代性地，可将这种制冷施加到从主热交换器提取的流上。然后，被冷却流可返回至塔或主热交换器。
集中制冷回路的操作可与现场液体存储器/罐系统集成。特别地，从制冷系统产生的液体可首先传送到存储器中用于根据需要随后分配到设备中。替代性地，可使用液体交换类型的热交换器，以将制冷介质传输到另外的介质中。例如，液化氮可相对于加压氧的冷凝流被蒸发。液化氧然后可被传送到存储器或设备，用于维持制冷。从集中制冷系统产生的液体中的一些可被引导至外界使用。如果液化流体被传送到低压存储器，那么将自然有必要将该流体机械地泵送回到各种空气分离设备中。
应当注意的是，包体（enclave）可使用多个不同类型的空气分离设备（其不必是复制过程）。例如，一个设备可设计成传输高压高纯度氮气流，而另一设备可设计成仅用于氧生成。在该两种情形中，集中制冷系统可用于向二者提供制冷。
虽然已经参考对于本领域技术人员来说优选的实施例描述了本发明，但是在不偏离由所附权利要求阐述的本发明精神和范围的前提下可作出许多变化、添加和省除。
权利要求书(按照条约第19条的修改)
1.一种向位于空气分离设施中的空气分离设备供应制冷的方法，所述方法包括：
在制冷系统内产生在低温下的制冷剂，所述制冷系统是液化器，所述液化器通过液化制冷剂而产生在低温下的制冷剂；以及
将在该低温下的制冷剂流引导到空气分离设备中，使得空气分离设备的制冷需求的全部或一部分由制冷剂流供应。
2.根据权利要求1所述的方法，其中，制冷系统间歇性地操作，使得空气分离设备的液体产物在操作制冷系统期间增加。
3.根据权利要求1所述的方法，其中：
空气在空气分离设备中分离，以产生包括富氮蒸汽的产物；
富氮蒸汽流离开所述空气分离设备的至少一个；
所述富氮蒸汽流在制冷系统内液化，以产生作为富氮液体的在低温下的制冷剂；以及
通过将所述富氮液体的富氮液体流引入到所述分离设备中从而将制冷剂流引入到空气分离设备中。
4.根据权利要求3所述的方法，其中，通过压缩并冷却被包含在富氮蒸汽流中的富氮蒸汽的一部分而在制冷系统中液化富氮蒸汽流，用于该冷却的制冷至少部分地通过在涡轮膨胀机内膨胀富氮蒸汽的另一部分而产生。
5.根据权利要求3所述的方法，其中：
空气在空气分离单元内的所述空气分离设备的至少第一空气分离设备内分离，所述空气分离单元包括高压塔和低压塔；
富氮蒸汽被产生作为低压塔的塔顶馏分；
富氮蒸汽流在所述空气分离设备的所述至少第一空气分离设备的主热交换器内被完全加热；以及
富氮液体流的至少一个作为高压塔的回流被引入到所述空气分离设备的所述至少第一空气分离设备中。
6.根据权利要求5所述的方法，其中：
富氧液体流被泵送，以产生泵送液体氧气流；
泵送液体氧气流的至少一部分通过与压缩空气流间接热交换而在主热交换器内被蒸发或伪蒸发；以及
间接热交换之后的压缩空气流被引入到液体膨胀机中并引入到所述高压塔和低压塔的至少一个中，以藉此满足所述空气分离设备的所述至少第一空气分离设备的制冷需求的一部分。
7.根据权利要求6所述的方法，其中：
压缩空气流是第一压缩空气流；
第二压缩空气流在主热交换器内被部分地冷却并且膨胀，以产生排气流；
所述排气流被引入到高压塔中，以满足所述空气分离设备的所述至少第一空气分离设备的制冷需求的另一部分；以及
所述富氮液体流的所述至少一个被引入到所述空气分离设备的所述至少第一空气分离设备，以增加在所述空气分离设备的至少第一空气分离设备中的液体产物。

Claims (8)

1. 一种向位于空气分离设施中的空气分离设备供应制冷的方法，所述方法包括：
在制冷系统内产生在低温下的制冷剂；以及
将在该低温下的制冷剂流引导到空气分离设备中，使得空气分离设备的制冷需求的全部或一部分由制冷剂流供应。
2. 根据权利要求1所述的方法，其中，所述制冷系统是液化器，所述液化器通过液化制冷剂而产生在低温下的制冷剂。
3. 根据权利要求1所述的方法，其中，所述制冷系统间歇性地操作，使得空气分离设备的液体产物在操作制冷系统期间增加。
4. 根据权利要求1所述的方法，其中：
空气在空气分离设备中分离，以产生包括富氮蒸汽的产物；
富氮蒸汽流离开所述空气分离设备的至少一个；
所述富氮蒸汽流在制冷系统内液化，以产生作为富氮液体的在低温下的制冷剂；以及
通过将所述富氮液体的富氮液体流引入到所述分离设备中从而将制冷剂流引入到空气分离设备中。
5. 根据权利要求4所述的方法，其中，通过压缩并冷却被包含在富氮蒸汽流中的富氮蒸汽的一部分而在制冷系统中液化富氮蒸汽流，用于该冷却的制冷至少部分地通过在涡轮膨胀机内膨胀富氮蒸汽的另一部分而产生。
6. 根据权利要求4所述的方法，其中：
空气在空气分离单元内的所述空气分离设备的至少第一空气分离设备内分离，所述空气分离单元包括高压塔和低压塔；
富氮蒸汽被产生作为低压塔的塔顶馏分；
富氮蒸汽流在所述空气分离设备的所述至少第一空气分离设备的主热交换器内被完全加热；以及
富氮液体流的至少一个作为高压塔的回流被引入到所述空气分离设备的所述至少第一空气分离设备中。
7. 根据权利要求6所述的方法，其中：
富氧液体流被泵送以产生泵送液体氧气流；
泵送液体氧气流的至少一部分通过与压缩空气流间接热交换而在主热交换器内被蒸发或伪蒸发；以及
间接热交换之后的压缩空气流被引入到液体膨胀机中并引入到所述高压塔和低压塔的至少一个中，以藉此满足所述空气分离设备的所述至少第一空气分离设备的制冷需求的一部分。
8. 根据权利要求7所述的方法，其中：
压缩空气流是第一压缩空气流；
第二压缩空气流在主热交换器内被部分地冷却并且膨胀，以产生排气流；
所述排气流被引入到高压塔中，以满足所述空气分离设备的所述至少第一空气分离设备的制冷需求的另一部分；以及
所述富氮液体流的所述至少一个被引入到所述空气分离设备的所述至少第一空气分离设备，以增加在所述空气分离设备的至少第一空气分离设备中的液体产物。
CN200980135340.2A 2008-09-10 2009-06-19 空气分离制冷供应方法 Active CN102149998B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12/207,757 US9714789B2 (en) 2008-09-10 2008-09-10 Air separation refrigeration supply method
US12/207757 2008-09-10
PCT/US2009/047871 WO2010030427A2 (en) 2008-09-10 2009-06-19 Air separation refrigeration supply method

Publications (2)

Publication Number Publication Date
CN102149998A true CN102149998A (zh) 2011-08-10
CN102149998B CN102149998B (zh) 2014-12-31

Family

ID=41798065

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200980135340.2A Active CN102149998B (zh) 2008-09-10 2009-06-19 空气分离制冷供应方法

Country Status (7)

Country Link
US (2) US9714789B2 (zh)
EP (1) EP2331899B1 (zh)
CN (1) CN102149998B (zh)
BR (1) BRPI0918514A2 (zh)
CA (1) CA2736175C (zh)
MX (1) MX2011002596A (zh)
WO (1) WO2010030427A2 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090320520A1 (en) * 2008-06-30 2009-12-31 David Ross Parsnick Nitrogen liquefier retrofit for an air separation plant
FR3044747B1 (fr) * 2015-12-07 2019-12-20 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procede de liquefaction de gaz naturel et d'azote
US20170211881A1 (en) 2016-01-22 2017-07-27 Zhengrong Xu Method and system for providing auxiliary refrigeration to an air separation plant
EP4184100A1 (en) * 2021-11-18 2023-05-24 Linde GmbH Method and cryogenic production arrangement for producing a liqui liquid nitrogen product

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR7606681A (pt) * 1975-10-28 1977-11-16 Linde Ag Processo e instalacao para fracionamento de ar
US5139547A (en) * 1991-04-26 1992-08-18 Air Products And Chemicals, Inc. Production of liquid nitrogen using liquefied natural gas as sole refrigerant
FR2702040B1 (fr) * 1993-02-25 1995-05-19 Air Liquide Procédé et installation de production d'oxygène et/ou d'azote sous pression.
FR2704632B1 (fr) * 1993-04-29 1995-06-23 Air Liquide Procede et installation pour la separation de l'air.
FR2723183B1 (fr) * 1994-07-29 1997-01-10 Grenier Maurice Procede et installation de liquefaction d'hydrogene
DE19526785C1 (de) * 1995-07-21 1997-02-20 Linde Ag Verfahren und Vorrichtung zur variablen Erzeugung eines gasförmigen Druckprodukts
JP3447437B2 (ja) * 1995-07-26 2003-09-16 日本エア・リキード株式会社 高純度窒素ガス製造装置
DE19609489A1 (de) * 1996-03-11 1997-09-18 Linde Ag Verfahren und Vorrichtung zur Verflüssigung eines tiefsiedenden Gases
US5638698A (en) * 1996-08-22 1997-06-17 Praxair Technology, Inc. Cryogenic system for producing nitrogen
US5758515A (en) * 1997-05-08 1998-06-02 Praxair Technology, Inc. Cryogenic air separation with warm turbine recycle
EP0908689A3 (en) * 1997-08-20 1999-06-23 AIR LIQUIDE Japan, Ltd. Method and apparatus for air distillation
FR2774753B1 (fr) * 1998-02-06 2000-04-28 Air Liquide Installation de distillation d'air comprenant plusieurs unites de distillation cryogenique de meme nature
US5878597A (en) * 1998-04-14 1999-03-09 Praxair Technology, Inc. Cryogenic rectification system with serial liquid air feed
FR2787560B1 (fr) * 1998-12-22 2001-02-09 Air Liquide Procede de separation cryogenique des gaz de l'air
EP1031804B1 (de) * 1999-02-26 2004-02-04 Linde AG Tieftemperaturzerlegung von Luft mit Stickstoff Rückführung
ATE342478T1 (de) * 1999-04-05 2006-11-15 Air Liquide Vorrichtung mit variabler auslastung und entsprechendes verfahren zur trennung eines einsatzgemisches
US6260380B1 (en) * 2000-03-23 2001-07-17 Praxair Technology, Inc. Cryogenic air separation process for producing liquid oxygen
EP1160528A3 (en) * 2000-05-30 2002-10-16 L'air Liquide, S.A. à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude Automatic control system and method for air separation units
EP1207362A1 (en) * 2000-10-23 2002-05-22 Air Products And Chemicals, Inc. Process and apparatus for the production of low pressure gaseous oxygen
FR2828729B1 (fr) * 2001-08-14 2003-10-31 Air Liquide Installation de production d'oxygene sous haute pression par distillation d'air
FR2831953B1 (fr) * 2001-11-05 2004-09-24 Air Liquide Procede de distillation d'air avec production d'argon et installation de distillation d'air correspondante
FR2844344B1 (fr) * 2002-09-11 2005-04-08 Air Liquide Installation de production de grandes quantites d'oxygene et/ou d'azote
US7143606B2 (en) * 2002-11-01 2006-12-05 L'air Liquide-Societe Anonyme A'directoire Et Conseil De Surveillance Pour L'etide Et L'exploitation Des Procedes Georges Claude Combined air separation natural gas liquefaction plant
FR2853407B1 (fr) 2003-04-02 2012-12-14 Air Liquide Procede et installation de fourniture de gaz sous pression
EP1544559A1 (de) 2003-12-20 2005-06-22 Linde AG Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
US7712331B2 (en) * 2006-06-30 2010-05-11 Air Products And Chemicals, Inc. System to increase capacity of LNG-based liquefier in air separation process
CN101033910B (zh) 2007-04-12 2011-07-27 杭州杭氧股份有限公司 集成空气分离与液化天然气冷量回收系统

Also Published As

Publication number Publication date
WO2010030427A3 (en) 2010-09-16
EP2331899A2 (en) 2011-06-15
CN102149998B (zh) 2014-12-31
CA2736175A1 (en) 2010-03-18
CA2736175C (en) 2015-01-20
US20170284735A1 (en) 2017-10-05
WO2010030427A4 (en) 2010-11-25
WO2010030427A2 (en) 2010-03-18
US20100058805A1 (en) 2010-03-11
US9714789B2 (en) 2017-07-25
BRPI0918514A2 (pt) 2015-12-01
MX2011002596A (es) 2011-08-03
EP2331899B1 (en) 2014-08-20

Similar Documents

Publication Publication Date Title
CN109690215B (zh) 工业气体场所与液氢生产的一体化
CN101097112B (zh) 低温分离空气进料的方法
JP5139292B2 (ja) Ｌｎｇのための天然ガス液化方法
US6196021B1 (en) Industrial gas pipeline letdown liquefaction system
US9810103B2 (en) Method and device for generating electrical energy
KR102283088B1 (ko) 에탄에 의한 사전 냉각 및 질소에 의한 보조 냉각으로 고압 사이클에서 천연가스를 액화시키기 위한 극지 캐스케이드 방법 및 그의 실시를 위한 플랜트
CN111406192B (zh) 通过与氮气膨胀机联动制动的膨胀机增压机来产生增压空气的深冷精馏方法与设备
CN101351680B (zh) 低温空气分离法
CN104755360B (zh) 用于通过低温蒸馏进行空气分离的方法和设备
CN101268326A (zh) 用于通过低温蒸馏分离空气的方法和设备
CN102155841A (zh) 低温分离方法及设备
US20170211880A1 (en) Method for obtaining an air product, and air separation plant
US20160190896A1 (en) Method for generating electrical energy and energy generation plant
US20170284735A1 (en) Air separation refrigeration supply method
JPH11257843A (ja) プロセス流れの圧縮のための廃棄物膨張の使用を伴う加圧空気分離方法
US8191386B2 (en) Distillation method and apparatus
CN105378411B (zh) 生产至少一种空气产品的方法、空分设备、产生电能的方法和装置
AU782163B2 (en) Process and apparatus for separating a gas mixture with emergency operation
JP2018169051A (ja) 空気分離方法、及び空気分離装置
US20160245585A1 (en) System and method for integrated air separation and liquefaction
CN105637311A (zh) 通过低温蒸馏分离空气的方法和装置
US9989306B2 (en) Method and device for recovering high-pressure oxygen and high-pressure nitrogen
AU723241B2 (en) Process and plant for air separation by cryogenic distillation
CN201772697U (zh) 用于从与空气分离连接的基于液化天然气的液化器供应气态氮的系统
CN114174747A (zh) 用于通过低温蒸馏分离空气的方法和设备

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant