CN105143800A - 用于冷却富烃馏分的方法 - Google Patents

用于冷却富烃馏分的方法 Download PDF

Info

Publication number
CN105143800A
CN105143800A CN201380057503.6A CN201380057503A CN105143800A CN 105143800 A CN105143800 A CN 105143800A CN 201380057503 A CN201380057503 A CN 201380057503A CN 105143800 A CN105143800 A CN 105143800A
Authority
CN
China
Prior art keywords
gas
nitrogen
hydrocarbon
cooling agent
compressor
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
CN201380057503.6A
Other languages
English (en)
Other versions
CN105143800B (zh
Inventor
M·卡曼
B·容费尔
S·波姆贝格尔
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of CN105143800A publication Critical patent/CN105143800A/zh
Application granted granted Critical
Publication of CN105143800B publication Critical patent/CN105143800B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • 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
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/122—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps
    • F04D29/124—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps with special means for adducting cooling or sealing fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
    • 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
    • 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
    • F25J1/0047—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 an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—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 an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant 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
    • F25J1/02—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
    • F25J1/0211—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 a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
    • F25J1/0212—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 a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a single flow MCR 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
    • 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
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0249—Controlling refrigerant inventory, i.e. composition or quantity
    • F25J1/025—Details related to the refrigerant production or treatment, e.g. make-up supply from feed gas itself
    • 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
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0262—Details of the cold heat exchange system
    • 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
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • 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
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/62—Separating low boiling components, e.g. He, H2, N2, 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/90—Processes or apparatus involving steps for recycling of process streams the recycled stream being boil-off gas from storage

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Mechanical Sealing (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

描述了一种用于冷却富烃馏分特别是天然气的方法，其中，-富烃馏分(1)依靠至少一个冷却剂回路(10-15)冷却，-冷却剂至少具有氮、二氧化碳、甲烷和/或C2+烃，-冷却剂借助至少一个具有一个或多个气体润滑滑动环形密封的涡轮压缩机(C1)被压缩，和--作为初级密封气体，基本上具有氮和/或甲烷的冷却剂和/或外部气体或气体混合物的支流供给到涡轮压缩机(C1)，并且提供氮作为次级密封气体，根据本发明，至少有时从冷却剂回路(10-15)抽出至少一个富氮流(21)。

Description

用于冷却富烃馏分的方法
本发明涉及一种用于冷却富烃馏分、特别是天然气的方法，其中
-富烃馏分相逆于至少一个冷却剂回路被冷却，
-冷却剂至少具有氮和/或二氧化碳和/或甲烷和/或C2+烃，
-冷却剂借助至少一个具有一个或多个气体润滑滑动环形密封的涡轮压缩机被压缩，和
-将基本上具有氮和/或甲烷的冷却剂和/或外部气体或气体混合物的支流作为初级密封气体供给到涡轮压缩机，并且提供氮作为次级密封气体。
所讨论的用于冷却富烃馏分的这类方法特别地用于天然气的液化。液化过程需要低温，通常通过一个或多个冷却剂回路提供低温。这里，由涡轮压缩机驱动的闭合的冷却剂回路是特别重要的。在闭合回路中，有时使用纯净物质作为冷却剂，但是大部分是使用选自不同馏分中的材料成分氮、甲烷和C2H4、C2H6、C3H6、C3H8、i/n-C4H10和i/n-C5H12等的材料混合物。表述“C2+烃”在这种情况下可以意味着上述的成分C2H4、C2H6、C3H6、C3H8、i/n-C4H10和i/n-C5H12等。
对于稳态的装置运行，低温回路在数量和摩尔成分上的总量保持不变。然而，低温回路会发生不可避免的泄漏，或者发生其他物质流或成分流进入低温回路。实质上为此负责的部件是用于压缩冷却剂的涡轮压缩机的轴密封，以及其中的密封气体供应。
冷却剂的污染和/或渗漏必须被补偿。然而，通常要确保在液化装置内氮的有效性以及来自待液化天然气的甲烷的供应，C2+烃损失的持久补偿与昂贵的安装费用、昂贵的运行成本和可能的物流问题有关。
因此必须保证，在涡轮压缩机轴密封的选择中，以及在密封的相关外围设备的设计中，尽可能保护低温回路的冷却剂总量。出于该目的，现在主要使用各种型式的气体润滑滑动环形密封。作为初级密封气体，它们填充有在相关的低温回路中循环的冷却剂，以避免过程侧污染。由于运行安全的原因，次级密封始终用氮进行，因此在气体密封的初级出口线路中，存在冷却剂和氮的混合物。该混合物通常被移除到装置闪燃(plantflare)，从而导致制冷剂的损失。
原则上，对于初级密封气体的填充，还可以使用外部密封气体，但是在这种情况下，即使选择合适型式的密封，外来成分进入低温回路并且因此始终存在冷却剂的污染。因为在一些情况下污染导致总量的相对大量损失，所以通常优选通过冷却剂密封，并且接受通过合适的调节而减少的密封损失，特别是对相对有价值的C2+烃和C2+成分的调节。
本发明的目的是提供一种所讨论的用于冷却富烃馏分的方法，其避免上述的缺点。
为了实现该目的，提出一种用于冷却富烃馏分的方法，其特征在于至少暂时地(zeitweilig)从冷却剂回路抽出至少一个富氮流。
在这种情况下，优选地在冷却剂回路的冷端抽出富氮流。特别是当在冷却剂回路中循环的冷却剂的氮和/或甲烷含量超过预置临界值时，则抽出富氮流。
根据本发明的方法，可以避免低温回路的氮和/或甲烷的富集。由此在这些成分和C2+烃之间的所希望的比率基本上保持不变。对于控制冷却剂的成分，因此如果仅仅以一定数量或希望的数量补充这两个成分，它是充足的。
有利地，抽出的富氮流的C2+烃馏分小于2mol％，优选小于0.5mol％。
与包括在现有技术中的方法相比，根据本发明的用于冷却富烃馏分的方法可使C2+烃或C2+冷却剂成分的损失减少大约99％。由于关于C2+烃的采购和运输的费用降到最低，这不仅使得运行成本大幅度减少，而且还减少了用于提供这些冷却剂部件的安装成本。此外，由于没有烃被送去闪燃，可以降低不必要的排放。
根据本发明的用于冷却富烃馏分的方法进一步有益的实施方案的特征在于，富烃馏分被液化，送到至少一个存储容器并且从这里排出蒸发气体馏分，则抽出的富氮流至少部分地被添加到蒸发气体馏分和/或被闪燃。表述“蒸发气体馏分”在这种情况下意思是由于热量引入存储容器内而蒸发的液化天然气(LNG)，以及在LNG引入存储容器期间被置换的气体。
由于在冷却剂回路中循环的冷却剂以单级或多级的方式被压缩，特别有益的是，通过气体密封的初级出口线路从涡轮压缩机排出的密封气体混合物通过在吸入侧的密封气体压力的提高被供给到压缩机或第一压缩机级。
由于基本上具有氮和/或甲烷的外部气体或气体混合物作为初级密封气体被供给到涡轮压缩机，该气体(混合物)有利地是从在冷却过程中存在和/或发生的馏分产生的。为了该目的，例如，可以使用压缩的蒸发气体馏分的支流和/或过程氮的支流。
根据本发明用于冷却富烃馏分的方法将在下文中参考图1示出的典型实施例来更详细地描述，图1示出了天然气液化过程。
通过线路1，待冷却和液化的天然气被供给到换热器E，在该换热器中天然气依靠低温回路的冷却剂被冷却并液化，将在下文中更详细地研究该冷却剂。在已经进行液化和任选地进行过冷之后，液化天然气(LNG)通过线路2供给到存储容器S。液化天然气通过线路3从存储容器S抽出。在存储容器S内产生的蒸发气体馏分通过线路4排出，优选地依靠天然气1在换热器E中加热，天然气1是待冷却的并且随后通过线路5——任选地在先前通过蒸发气体压缩机C2的压缩之后——输送，作为所谓的通过线路22的燃料气体馏分。该馏分的支流可以通过线路区段23和18作为初级密封气体供给到仍待描述的涡轮压缩机C1中。
在低温回路内循环的冷却剂具有例如氮、甲烷和C2+烃成分。该冷却剂在设计为具有一个或多个气体润滑滑动环形密封的单级或多级压缩机的涡轮压缩机C1中被压缩。被压缩到希望的回路压力的冷却剂通过线路10供给到换热器E，并且在其中依靠本身冷却。通过线路11，冷却的冷却剂从换热器E排出，并且在膨胀阀a中制冷膨胀。
膨胀的冷却剂随后通过线路12供给到分离器D1，并且在其中分离成液态富C2+烃馏分13和基本上仅仅包括氮和甲烷的气态馏分14。上述的两个馏分在换热器E的上游立即重组并且经过换热器E与待冷却的天然气流1以及待冷却的冷却剂流10相逆流地实施。在这种情况下加热的冷却剂随后通过线路15供给到连接涡轮压缩机C1上游的容器D2。该容器用于分离存在于加热的冷却剂流15中的任何液态成分；产生在容器D2中的气体馏分通过线路16供给到涡轮压缩机C1中。
作为上述过程的替代方案，冷却剂以两级在冷却剂回路的冷端膨胀。如所描述的，在阀a中在第一膨胀级中膨胀的冷却剂在分离器D1中分离成液态富C2+烃馏分13和基本上仅仅包括氮和甲烷的气态馏分14，其中液态富C2+烃馏分13随后在阀a′中膨胀到冷却剂的蒸发压力，阀a′由虚线示出。该过程与上述过程相比较的优点在于，待喷射的低沸点成分在第一膨胀中以气相富集。因此该过程可以成为更优选的。
在低温回路中循环的冷却剂的支流和/或基本上包括氮和/或甲烷的外部气体或气体混合物作为初级密封气体供给到涡轮压缩机C1。该冷却剂支流的供给通过线路17进行，在线路17中布置有控制阀c。外部气体或气体混合物通过线路18作为初级密封气体供给到涡轮压缩机C1，在线路18中同样布置有控制阀d。此外，氮或富氮馏分作为次级密封气体供给到涡轮压缩机C。为了清楚，这没有在图1中示出。
然后，如果氮和/或甲烷成分的富集发生在低温回路之内，这些成分可以通过线路21从低温回路中抽出，在线路21中布置有控制阀b。提供上述的分离器D1可确保通过线路21从低温回路抽出的富氮流21实质上不包含C2+烃。因此其在低温回路内的损失是可以忽略的。
如图1所示，有可能有利的是将富氮流21添加到从存储容器S抽出的蒸发气体馏分4中，并与其一起加热。可替换地，或另外补充地，富氮流21还可以被闪燃。
优选地，在低温回路的冷端抽出富氮流21。然而，作为其替代方案，也可以考虑其它抽出位置。此外富氮流21可以连续地或间断地抽出。特别是，一旦在冷却剂回路中循环的冷却剂的氮和/或甲烷含量超过预置的临界值，则抽出富氮流21。为了该目的必须监测冷却剂的成分。
此外，通过其气体密封的初级出口线路从涡轮压缩机C1排出的密封气体混合物可以返回到压缩机中，或在多级压缩情况下，优选地通过上述容器D2，在吸入侧返回到第一压缩机级；这在图1中通过线路20表示。上述通过涡轮压缩机C1或其第一压缩机级的上游的初级出口线路排出的密封气体混合物的循环可以直接通过提升初级密封气体压力来进行，而无需额外的装置费用。上述涡轮压缩机或其第一压缩机级上游的通过初级出口线路排出的密封气体混合物的循环还可以使用喷射器或更多的压缩机实现。作为喷射器的运动流，为了该目的，可以使用来自涡轮压缩机C1的压力侧的冷却剂。
需要明确地强调，根据本发明的方法不仅仅是在与图1示出的低温回路结合时可实施或合理的，而是根据本发明的原则可与任何已知的低温回路或多个低温回路的组合相结合而实施——与其中是纯净物质还是混合物循环无关。

Claims (8)

1.一种用于冷却富烃馏分、特别是天然气的方法，其中
-富烃馏分(1)相逆于至少一个冷却剂回路(10-15)被冷却，
-冷却剂至少具有氮、二氧化碳、甲烷和/或C2+烃，
-冷却剂借助至少一个具有一个或多个气体润滑滑动环形密封的涡轮压缩机(C1)被压缩，和
-作为初级密封气体，基本上具有氮和/或甲烷的冷却剂和/或外部气体或气体混合物的支流供给到涡轮压缩机(C1)，并且提供氮作为次级密封气体，
其特征在于，至少暂时地从冷却剂回路(10-15)抽出至少一个富氮流(21)。
2.根据权利要求1的方法，其特征在于，所述富氮流(21)在冷却剂回路(10-16)的冷端被抽出。
3.根据权利要求1或2的方法，其特征在于所述抽出的富氮流中C2+烃馏分低于2mol％的，优选低于0.5mol％。
4.根据前述权利要求1至3任何之一的方法，其特征在于，一旦在冷却剂回路(10-16)中循环的冷却剂的氮和/或甲烷含量超过预置的临界值，则抽出富氮流(21)。
5.根据前述权利要求1至4任何一个的方法，其中富烃馏分被液化，供给到至少一个存储容器，并且由该容器中排出蒸发气体馏分，其特征在于，所抽出的富氮流(21)被至少部分地添加到蒸发气体馏分(4)中和/或闪燃。
6.根据前述权利要求1至5任何一个的方法，其中在冷却剂回路中循环的冷却剂以单级或多级的方式被压缩，其特征在于，通过气体密封的初级出口线路从涡轮压缩机(C1)排出的密封气体混合物(20)通过提升吸入侧的密封气体压力而被供给到压缩机或第一压缩机级。
7.根据前述权利要求1至6任何一个的方法，其中，作为初级密封气体，基本上具有氮和/或甲烷的外部气体或气体混合物被供给至涡轮压缩机，其特征在于该气体(混合物)由在冷却过程中存在和/或发生的馏分产生，并且优选地是压缩的蒸发气体馏分(24)和/或过程氮的支流。
8.根据前述权利要求1至7任何一个的方法，其特征在于，冷却剂以两级在冷却剂回路的冷端膨胀，其中在第一级(a)膨胀的冷却剂在分离器(D1)中分离成液态富C2+烃馏分(13)和基本上仅仅包含氮和甲烷的气态馏分(14)，并且液态富C2+烃馏分(13)随后膨胀到冷却剂(a′)的蒸发压力。
CN201380057503.6A 2012-11-02 2013-10-29 用于冷却富烃馏分的方法 Active CN105143800B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012021637.8 2012-11-02
DE102012021637.8A DE102012021637A1 (de) 2012-11-02 2012-11-02 Verfahren zum Abkühlen einer Kohlenwasserstoff-reichen Fraktion
PCT/EP2013/003259 WO2014067652A2 (de) 2012-11-02 2013-10-29 Verfahren zum abkühlen einer kohlenwasserstoff-reichen fraktion

Publications (2)

Publication Number Publication Date
CN105143800A true CN105143800A (zh) 2015-12-09
CN105143800B CN105143800B (zh) 2017-10-27

Family

ID=49513899

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201380057503.6A Active CN105143800B (zh) 2012-11-02 2013-10-29 用于冷却富烃馏分的方法

Country Status (10)

Country Link
US (1) US20150253068A1 (zh)
CN (1) CN105143800B (zh)
AU (1) AU2013339779B2 (zh)
BR (1) BR112015009199A2 (zh)
CA (1) CA2887205C (zh)
DE (1) DE102012021637A1 (zh)
MY (1) MY173231A (zh)
NO (1) NO20150685A1 (zh)
RU (1) RU2654309C2 (zh)
WO (1) WO2014067652A2 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3339605A1 (en) * 2016-12-23 2018-06-27 Linde Aktiengesellschaft Method for compressing a gas mixture comprising neon
GB2563021A (en) * 2017-05-30 2018-12-05 Linde Ag Refrigeration circuit system and method of maintaining a gas seal of a compressor system
FR3087525B1 (fr) * 2018-10-22 2020-12-11 Air Liquide Procede de liquefaction d'un courant gazeux d'evaporation issu du stockage d'un courant de gaz naturel liquefie
FR3087524B1 (fr) * 2018-10-22 2020-12-11 Air Liquide Procede et une installation de liquefaction de gaz naturel
FR3108167B1 (fr) * 2020-03-11 2022-02-11 Gaztransport Et Technigaz Système de traitement d’un gaz naturel issu d’une cuve d’un ouvrage flottant configuré pour alimenter en gaz naturel en tant que carburant un appareil consommateur de gaz naturel
FR3140938A1 (fr) * 2022-10-17 2024-04-19 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procédé et appareil de récupération de gaz pour compresseur

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5791160A (en) * 1997-07-24 1998-08-11 Air Products And Chemicals, Inc. Method and apparatus for regulatory control of production and temperature in a mixed refrigerant liquefied natural gas facility
WO2004068049A1 (en) * 2003-01-31 2004-08-12 Shell Internationale Research Maatschappij B.V. Process of liquefying a gaseous, methhane-rich feed to obtain liquefied natural gas
CN101095023A (zh) * 2005-01-03 2007-12-26 林德股份公司 用于从lng中分离富c2+的馏分的方法
US20090126401A1 (en) * 2007-11-15 2009-05-21 Conocophillips Company Dual-refluxed heavies removal column in an lng facility
US20100293996A1 (en) * 2007-11-16 2010-11-25 Michiel Gijsbert Van Aken Method and apparatus for liquefying a hydrocarbon stream and floating vessel or offshore platform comprising the same
FR2965608A1 (fr) * 2010-09-30 2012-04-06 IFP Energies Nouvelles Procede de liquefaction d'un gaz naturel avec un changement continu de la composition d'au moins un melange refrigerant
CN102449419A (zh) * 2009-02-10 2012-05-09 林德股份公司 用于液化富烃流的方法
CN102762944A (zh) * 2008-04-09 2012-10-31 国际壳牌研究有限公司 用于液化烃流的方法和设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4311004A (en) * 1979-10-26 1982-01-19 Rotoflow Corporation Gas compression system and method
US5651270A (en) * 1996-07-17 1997-07-29 Phillips Petroleum Company Core-in-shell heat exchangers for multistage compressors
US6394764B1 (en) * 2000-03-30 2002-05-28 Dresser-Rand Company Gas compression system and method utilizing gas seal control
RU2272228C1 (ru) * 2005-03-30 2006-03-20 Анатолий Васильевич Наумейко Универсальный способ разделения и сжижения газа (варианты) и устройство для его осуществления
DE102009012038B4 (de) * 2009-03-10 2014-10-30 Siemens Aktiengesellschaft Wellendichtung für eine Strömungsmaschine
JP5231611B2 (ja) * 2010-10-22 2013-07-10 株式会社神戸製鋼所 圧縮機

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5791160A (en) * 1997-07-24 1998-08-11 Air Products And Chemicals, Inc. Method and apparatus for regulatory control of production and temperature in a mixed refrigerant liquefied natural gas facility
WO2004068049A1 (en) * 2003-01-31 2004-08-12 Shell Internationale Research Maatschappij B.V. Process of liquefying a gaseous, methhane-rich feed to obtain liquefied natural gas
CN101095023A (zh) * 2005-01-03 2007-12-26 林德股份公司 用于从lng中分离富c2+的馏分的方法
US20090126401A1 (en) * 2007-11-15 2009-05-21 Conocophillips Company Dual-refluxed heavies removal column in an lng facility
US20100293996A1 (en) * 2007-11-16 2010-11-25 Michiel Gijsbert Van Aken Method and apparatus for liquefying a hydrocarbon stream and floating vessel or offshore platform comprising the same
CN102762944A (zh) * 2008-04-09 2012-10-31 国际壳牌研究有限公司 用于液化烃流的方法和设备
CN102449419A (zh) * 2009-02-10 2012-05-09 林德股份公司 用于液化富烃流的方法
FR2965608A1 (fr) * 2010-09-30 2012-04-06 IFP Energies Nouvelles Procede de liquefaction d'un gaz naturel avec un changement continu de la composition d'au moins un melange refrigerant

Also Published As

Publication number Publication date
MY173231A (en) 2020-01-07
AU2013339779B2 (en) 2017-08-31
DE102012021637A1 (de) 2014-05-08
US20150253068A1 (en) 2015-09-10
AU2013339779A1 (en) 2015-04-23
WO2014067652A3 (de) 2015-07-16
CN105143800B (zh) 2017-10-27
BR112015009199A2 (pt) 2017-07-04
CA2887205A1 (en) 2014-05-08
RU2654309C2 (ru) 2018-05-17
CA2887205C (en) 2021-05-04
RU2015120287A (ru) 2016-12-27
WO2014067652A2 (de) 2014-05-08
NO20150685A1 (en) 2015-05-28

Similar Documents

Publication Publication Date Title
CN105143800A (zh) 用于冷却富烃馏分的方法
RU2531099C1 (ru) Комплексное хранение жидкости
US9528758B2 (en) Method and system for regulation of cooling capacity of a cooling system based on a gas expansion process
US9506690B2 (en) Process for the production of a subcooled liquefied natural gas stream from a natural gas feed stream, and associated installation
CN105509383B (zh) 在天然气液化工艺中的制冷剂回收
US9316434B2 (en) Process for producing liquid and gaseous nitrogen streams, a gaseous stream which is rich in helium and a denitrided stream of hydrocarbons and associated installation
US20090217701A1 (en) Natural Gas Liquefaction Process for Ling
KR101242949B1 (ko) 이산화탄소 재액화 공정
CN105452752B (zh) 浮罐应用中汽化和回收残留lng的联合级联方法
US11067320B2 (en) Gas recovery system for compressor, compressor system, and refrigeration cycle system
EP3264011A1 (en) Gas recovery system, compressor system, and refrigeration cycle system
GB2522421A (en) LNG production process
AU2006261281A1 (en) Method for liquefying a hydrocarbon-rich flow
CA3109918C (en) Managing make-up gas composition variation for a high pressure expander process
CN111108335B (zh) 制冷剂和氮气回收
CN104019626A (zh) 一种混合冷剂二级制冷制备液化天然气的方法及装置
CN204678802U (zh) 一种富氮bog液化的装置
CN106196881A (zh) 用于液化含烃气体的方法和系统
EP2796819B1 (en) Method and apparatus for the liquefaction of natural gas
US20120017640A1 (en) Process for separating off nitrogen
US20190137170A1 (en) System and method for producing liquefied natural gas
EP3045849A2 (en) A plant for liquefying methane gas
US20200064062A1 (en) Primary Loop Start-Up Method for a High Pressure Expander Process
CN104913594A (zh) 一种富氮bog液化的工艺及装置
US10072889B2 (en) Liquefaction system using a turboexpander

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant