[go: up one dir, main page]

CN111397306A - 乙烯液化装置与工艺 - Google Patents

乙烯液化装置与工艺 Download PDF

Info

Publication number
CN111397306A
CN111397306A CN202010355026.3A CN202010355026A CN111397306A CN 111397306 A CN111397306 A CN 111397306A CN 202010355026 A CN202010355026 A CN 202010355026A CN 111397306 A CN111397306 A CN 111397306A
Authority
CN
China
Prior art keywords
heat exchanger
pipeline
cooling
throttling valve
throttling
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.)
Pending
Application number
CN202010355026.3A
Other languages
English (en)
Inventor
张武
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.)
Zhongke Ruiao Energy Technology Co ltd
Original Assignee
Zhongke Ruiao Energy Technology Co ltd
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 Zhongke Ruiao Energy Technology Co ltd filed Critical Zhongke Ruiao Energy Technology Co ltd
Priority to CN202010355026.3A priority Critical patent/CN111397306A/zh
Publication of CN111397306A publication Critical patent/CN111397306A/zh
Pending legal-status Critical Current

Links

Images

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
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0228Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0235Heat exchange integration
    • 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
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022Hydrocarbons, e.g. natural gas
    • 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
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003Processes 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
    • F25J1/0047Processes 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
    • F25J1/0052Processes 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
    • F25J1/0055Processes 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 originating from an incorporated cascade
    • 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
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0211Processes 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
    • F25J1/0212Processes 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
    • 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
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • 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
    • F25J2215/00Processes characterised by the type or other details of the product stream
    • F25J2215/62Ethane or ethylene

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

本发明的乙烯液化装置与工艺,其中,本发明的乙烯液化装置,包括:用于对原料气进行冷却的第一换热器;用于对冷却后的原料气进行再次冷却,使原料气液化为液相的第二换热器,与第一换热器通过管路连接;用于使液化后的液相节流降温的第一节流阀,与第二换热器通过管路连接;用于储藏节流降温后的所述液相的储罐,与所述第一节流阀通过管路连接。本发明的乙烯液化工艺,包括:对原料气进行冷却;对冷却后的原料气进行再次冷却,使原料气液化为液相;使液化后的液相节流降温;储藏节流降温后的所述液相。本发明的技术方案的优点是:能耗低,设备投资少,安全实用,可以大规模推广。

Description

乙烯液化装置与工艺
技术领域
本发明涉及乙烯利用领域,特别是涉及一种乙烯液化装置与工艺。
技术领域
现有的化工生产中,有很多工业气体需要液化储存,对于不同的气体,液化温度及液化工艺都有所不同。对于乙烯液化,常规的液化手段耗能较多,装置比较复杂。
发明内容
本发明要解决的技术问题是提供一种能耗低、结构简单、运行稳定的乙烯液化装置与工艺。
本发明的乙烯液化装置,包括:
用于对原料气进行冷却的第一换热器;
用于对冷却后的原料气进行再次冷却,使原料气液化为液相的第二换热器,与第一换热器通过管路连接;
用于使液化后的液相节流降温的第一节流阀,与第二换热器通过管路连接;
用于储藏节流降温后的所述液相的储罐,与所述第一节流阀通过管路连接。
本发明的乙烯液化装置,其中,还包括用于向所述第一换热器、第二换热器提供冷量的混合冷剂制冷系统,所述混合冷剂制冷系统包括混合冷剂压缩机、第二节流阀、第三节流阀,混合冷剂压缩机通过第一管路连接第二节流阀,第二节流阀通过第二管路连接混合冷剂压缩机,通过第一管路、第二管路,气相制冷剂在混合冷剂压缩机与第二节流阀之间循环,第一管路分别依次经过第一换热器、第二换热器,第二管路分别依次经过第二换热器、第一换热器,以使混合冷剂压缩机通过第一管路向第二节流阀输送被压缩的气相制冷剂,第一管路中的气相制冷剂在第一换热器、第二换热器中冷却,气相制冷剂被第二节流阀节流降温后,在第二管路内为第二换热器、第一换热器中提供冷量,混合冷剂压缩机通过第三管路连接第三节流阀,第三节流阀通过第四管路连接于第二管路上,液相制冷剂在混合冷剂压缩机与第三节流阀之间循环,第三管路经过第一换热器,以使混合冷剂压缩机通过第三管路向第三节流阀输送被压缩的液相制冷剂,第三管路中的液相制冷剂在第一换热器中冷却,液相制冷剂被第三节流阀节流降温后,与第二管路中的气相制冷剂汇合并输至混合冷剂压缩机。
本发明的乙烯液化工艺,包括:
对原料气进行冷却;
对冷却后的原料气进行再次冷却,使原料气液化为液相;
使液化后的液相节流降温;
储藏节流降温后的所述液相。
本发明的技术方案的优点是:能耗低,设备投资少,安全实用,可以大规模推广。
附图说明
图1为本发明的乙烯液化装置的结构示意图。
具体实施方式
如图1所示,本发明的乙烯液化装置,包括:
用于对原料气进行冷却的第一换热器E1;
用于对冷却后的原料气进行再次冷却,使原料气液化为液相的第二换热器E2,与第一换热器通过管路连接;
用于使液化后的液相节流降温的第一节流阀V1,与第二换热器通过管路连接;
用于储藏节流降温后的所述液相的储罐V10,与所述第一节流阀通过管路连接。
本发明的乙烯液化装置,其中,还包括用于向所述第一换热器E1、第二换热器E2提供冷量的混合冷剂制冷系统,所述混合冷剂制冷系统包括混合冷剂压缩机C1、第二节流阀V2、第三节流阀V3,混合冷剂压缩机通过第一管路1连接第二节流阀,第二节流阀通过第二管路2连接混合冷剂压缩机,通过第一管路、第二管路,气相制冷剂在混合冷剂压缩机与第二节流阀之间循环,第一管路分别依次经过第一换热器、第二换热器,第二管路2分别依次经过第二换热器、第一换热器,以使混合冷剂压缩机通过第一管路向第二节流阀输送被压缩的气相制冷剂,第一管路中的气相制冷剂在第一换热器、第二换热器中冷却,气相制冷剂被第二节流阀节流降温后,在第二管路内为第二换热器、第一换热器中提供冷量,混合冷剂压缩机通过第三管路3连接第三节流阀V3,第三节流阀通过第四管路4连接于第二管路2上,液相制冷剂在混合冷剂压缩机与第三节流阀之间循环,第三管路经过第一换热器,以使混合冷剂压缩机通过第三管路向第三节流阀输送被压缩的液相制冷剂,第三管路中的液相制冷剂在第一换热器中冷却,液相制冷剂被第三节流阀节流降温后,与第二管路中的气相制冷剂汇合并输至混合冷剂压缩机。
本发明的乙烯液化工艺,包括:
对原料气进行冷却;
对冷却后的原料气进行再次冷却,使原料气液化为液相;
使液化后的液相节流降温;
储藏节流降温后的所述液相。
利用本发明的乙烯液化装置进行本发明的乙烯液化工艺的具体实施方式:
来自界区的原料气进入第一换热器E1、第二换热器E2降温后液化,经节流阀节流降压后,进入储罐V10,本装置的液化冷量由混合冷剂压缩机C1提供,制冷剂经压缩机增压,并冷却分离后,气相冷剂经第一换热器E1、第二换热器E2降温,经过节流阀节流降温降压后,为二换热器E2提供冷量,液相冷剂经第一换热器E1降温后,经过节流阀节流降温降压,与另外一股冷剂汇合,为第一换热器E1提供冷量后,出换热器,最终回到混合冷剂压缩机入口。
换热器可以是板翅式换热器,也可以是绕管式换热器。
压缩机可以是透平式、螺杆式,活塞式压缩机。
原料气组分可以为乙烯、乙烷、甲烷、二氧化碳、一氧化碳、氮气、氧气等。
制冷剂可以是氮气、甲烷、乙烯、乙烷、丙烷、异丁烷、异戊烷的任意组合。
混合制冷剂是由两种或两种以上制冷剂组成的混合物。由于纯制冷剂在品种和性质上的局限性,采用混合物作制冷剂为调制制冷剂的性质和扩大制冷剂的选择方面提供了更大的自由度。
以上仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (3)

1.一种乙烯液化装置,其特征在于,包括:
用于对原料气进行冷却的第一换热器;
用于对冷却后的原料气进行再次冷却,使原料气液化为液相的第二换热器,与第一换热器通过管路连接;
用于使液化后的液相节流降温的第一节流阀,与第二换热器通过管路连接;
用于储藏节流降温后的所述液相的储罐,与所述第一节流阀通过管路连接。
2.如权利要求1所述的乙烯液化装置,其特征在于,还包括用于向所述第一换热器、第二换热器提供冷量的混合冷剂制冷系统,所述混合冷剂制冷系统包括混合冷剂压缩机、第二节流阀、第三节流阀,混合冷剂压缩机通过第一管路连接第二节流阀,第二节流阀通过第二管路连接混合冷剂压缩机,通过第一管路、第二管路,气相制冷剂在混合冷剂压缩机与第二节流阀之间循环,第一管路分别依次经过第一换热器、第二换热器,第二管路分别依次经过第二换热器、第一换热器,以使混合冷剂压缩机通过第一管路向第二节流阀输送被压缩的气相制冷剂,第一管路中的气相制冷剂在第一换热器、第二换热器中冷却,气相制冷剂被第二节流阀节流降温后,在第二管路内为第二换热器、第一换热器中提供冷量,混合冷剂压缩机通过第三管路连接第三节流阀,第三节流阀通过第四管路连接于第二管路上,液相制冷剂在混合冷剂压缩机与第三节流阀之间循环,第三管路经过第一换热器,以使混合冷剂压缩机通过第三管路向第三节流阀输送被压缩的液相制冷剂,第三管路中的液相制冷剂在第一换热器中冷却,液相制冷剂被第三节流阀节流降温后,与第二管路中的气相制冷剂汇合并输至混合冷剂压缩机。
3.一种乙烯液化工艺,其特征在于,包括:
对原料气进行冷却;
对冷却后的原料气进行再次冷却,使原料气液化为液相;
使液化后的液相节流降温;
储藏节流降温后的所述液相。
CN202010355026.3A 2020-04-29 2020-04-29 乙烯液化装置与工艺 Pending CN111397306A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010355026.3A CN111397306A (zh) 2020-04-29 2020-04-29 乙烯液化装置与工艺

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010355026.3A CN111397306A (zh) 2020-04-29 2020-04-29 乙烯液化装置与工艺

Publications (1)

Publication Number Publication Date
CN111397306A true CN111397306A (zh) 2020-07-10

Family

ID=71435510

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010355026.3A Pending CN111397306A (zh) 2020-04-29 2020-04-29 乙烯液化装置与工艺

Country Status (1)

Country Link
CN (1) CN111397306A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115069057A (zh) * 2022-06-17 2022-09-20 中国空分工程有限公司 一种低温精馏提纯回收二氧化碳的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2168124C2 (ru) * 1999-06-15 2001-05-27 ЗАО "Сигма-Газ" Способ сжижения природного газа
WO2008006867A2 (en) * 2006-07-14 2008-01-17 Shell Internationale Research Maatschappij B.V. Method and apparatus for cooling a hydrocarbon stream
CN102455112A (zh) * 2010-10-18 2012-05-16 袁俊海 丙烷预冷混合冷剂制天然气液化工艺
CN212030019U (zh) * 2020-04-29 2020-11-27 中科瑞奥能源科技股份有限公司 乙烯液化装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2168124C2 (ru) * 1999-06-15 2001-05-27 ЗАО "Сигма-Газ" Способ сжижения природного газа
WO2008006867A2 (en) * 2006-07-14 2008-01-17 Shell Internationale Research Maatschappij B.V. Method and apparatus for cooling a hydrocarbon stream
CN102455112A (zh) * 2010-10-18 2012-05-16 袁俊海 丙烷预冷混合冷剂制天然气液化工艺
CN212030019U (zh) * 2020-04-29 2020-11-27 中科瑞奥能源科技股份有限公司 乙烯液化装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115069057A (zh) * 2022-06-17 2022-09-20 中国空分工程有限公司 一种低温精馏提纯回收二氧化碳的方法

Similar Documents

Publication Publication Date Title
AU2021201534B2 (en) Pre-cooling of natural gas by high pressure compression and expansion
EP2171341B1 (en) Boil-off gas treatment process and system
CN108369060B (zh) 用液氮增强的基于膨胀器的lng生产方法
KR101677306B1 (ko) 천연가스 피드스트림으로부터 과냉각된 액화천연가스 스트림의 제조방법과 그 장치
CN105674686B (zh) 一种膨胀制冷富甲烷气液化的方法及装置
EA006724B1 (ru) Способ получения сжиженного природного газа (варианты)
CA3040876C (en) Method and system for cooling a hydrocarbon stream using a gas phase refrigerant
CN105823304B (zh) 一种双级膨胀制冷富甲烷气液化的方法及装置
CN107917577A (zh) 多压力混合的制冷剂冷却方法和系统
US20250251188A1 (en) Hydrogen Liquefaction System and Method
AU2007310940B2 (en) Method and apparatus for liquefying hydrocarbon streams
CN102748918A (zh) 双级混合冷剂循环天然气液化系统
US11892233B2 (en) Natural gas liquefaction by a high pressure expansion process
CN105783420A (zh) 一种基于缠绕管式换热器的双冷剂循环天然气液化系统
CN212030019U (zh) 乙烯液化装置
CN111397306A (zh) 乙烯液化装置与工艺
CN203310202U (zh) 一种应用于基荷型天然气液化工厂的双混合冷剂液化系统
CN216384787U (zh) 一种氢气液化设备及系统
CN210220390U (zh) 一种适用于超大规模的三循环天然气液化装置
CN102564061B (zh) 一种应用于基荷型天然气液化工厂的双级混合冷剂循环液化系统
CN103234326B (zh) 应用于基荷型天然气液化工厂的双混合冷剂液化系统
CN104880024B (zh) 一种双膨胀制冷工艺的天然气液化系统
CN105371590A (zh) 全回收冷量的天然气带预冷及混合制冷液化工艺
CN114963689A (zh) 一种双循环混合冷剂天然气液化系统
CN212481844U (zh) 空分装置

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20200710

RJ01 Rejection of invention patent application after publication