CN110274438A - 一种空分装置 - Google Patents

一种空分装置 Download PDF

Info

Publication number
CN110274438A
CN110274438A CN201910446615.XA CN201910446615A CN110274438A CN 110274438 A CN110274438 A CN 110274438A CN 201910446615 A CN201910446615 A CN 201910446615A CN 110274438 A CN110274438 A CN 110274438A
Authority
CN
China
Prior art keywords
air
nitrogen
gas turbine
cycle system
expanding machine
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
CN201910446615.XA
Other languages
English (en)
Inventor
周侃
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.)
Shaanxi Qinfeng Gas Co Ltd
Original Assignee
Shaanxi Qinfeng Gas 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 Shaanxi Qinfeng Gas Co Ltd filed Critical Shaanxi Qinfeng Gas Co Ltd
Priority to CN201910446615.XA priority Critical patent/CN110274438A/zh
Publication of CN110274438A publication Critical patent/CN110274438A/zh
Pending legal-status Critical Current

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
    • 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
    • F25J3/04248—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
    • F25J3/04284—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
    • F25J3/04309—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 nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—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.
    • 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
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms

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

本发明提供了一种空分装置，包括空气制冷循环***、板翅式主换热器和精馏塔，其中，还包括氮气制冷循环***，所述氮气制冷循环***包括依次连接的氮气透平膨胀机和发电机制动装置，所述氮气透平膨胀机分别与板翅式主换热器、精馏塔相连接。本发明采用正流空气膨胀结合下塔压力氮气返流膨胀的流程形式达到节能效果。

Description

一种空分装置
技术领域
本发明属于工业气体领域，具体涉及一种空分装置。
背景技术
现有技术的空分装置仅设置了空气制冷循环***，没有设置氮气制冷循环***。这种设置方案上塔回流比远大于最小回流比，上塔精馏潜力未得到充分利用，不利于节能。
发明内容
针对现有技术中存在的不足，本发明的目的在于，提供一种空分装置，解决现有技术上塔精馏潜力利用不足的技术问题。
为了解决上述技术问题，本申请采用如下技术方案予以实现：
一种空分装置，包括空气制冷循环***、板翅式主换热器和精馏塔，其特征在于，还包括氮气制冷循环***，所述氮气制冷循环***包括依次连接的氮气透平膨胀机和发电机制动装置，所述氮气透平膨胀机分别与板翅式主换热器、精馏塔相连接。
进一步地，所述空气制冷循环***包括依次连接的空气增压机和空气增压透平膨胀机，所述空气增压透平膨胀机分别与板翅式主换热器、精馏塔相连接。
进一步地，所述精馏塔包括上塔和下塔，所述上塔和下塔之间设有主冷凝蒸发器。
进一步地，所述氮气透平膨胀机和发电机制动装置通过齿轮箱连接。
进一步地，所述氮气透平膨胀机与下塔相连接。
进一步地，所述氮气透平膨胀机从下塔抽取氮气进行膨胀做功，再将膨胀做功输入至发电机制动装置。
本发明与现有技术相比，有益的技术效果是：
本发明采用正流空气膨胀结合下塔压力氮气返流膨胀的流程形式达到节能效果；通过氮气透平膨胀机直接驱动发电机制动装置进行发电；此外，氮气透平膨胀机组成的氮气制冷循环***承担了空气制冷循环***部分制冷功能，可以减少第一空气制冷循环***的负荷，从而降低了其第一空气制冷循环***中空气增压机的用电。
附图说明
图1为本发明的结构示意图；
图中符号代表为：1—氮气透平膨胀机；2—发电机制动装置；3—板翅式主换热器；4—精馏塔；5—空气增压透平膨胀机；6—主冷凝蒸发器；7—空气增压机；41—上塔；42—下塔。
以下结合附图和实施例对本发明的具体内容作进一步详细解释说明。
具体实施方式
以下给出本发明的具体实施例，需要说明的是本发明并不局限于以下具体实施例，凡在本申请技术方案基础上做的等同变换均落入本发明的保护范围。
实施例：
本实施例提供了一种空分装置，如图1所示，包括空气制冷循环***、板翅式主换热器3和精馏塔4，还包括氮气制冷循环***，所述氮气制冷循环***包括依次连接的氮气透平膨胀机1和发电机制动装置2，所述氮气透平膨胀机1分别与板翅式主换热器3、精馏塔4相连接。
本发明通过氮气透平膨胀机1从精馏塔4的下塔42中抽取出额外的氮气，减少上塔41的液氮回流液，使上塔41回流比尽量接近最小回流比，从而做大程度挖掘上塔41精馏潜力。
空气制冷循环***包括依次连接的空气增压机7和空气增压透平膨胀机5，所述空气增压透平膨胀机5分别与板翅式主换热器3、精馏塔4相连接。
精馏塔4包括上塔41和下塔42，所述上塔41和下塔42之间设有主冷凝蒸发器6。主冷凝蒸发器6的液氮出口连接至下塔42和上塔41的顶部，分别作为上塔41和下塔42的回流液。
氮气透平膨胀机1和发电机制动装置2通过齿轮箱连接。
氮气透平膨胀机1与下塔42相连接。
氮气透平膨胀机1从下塔42抽取氮气进行膨胀做功，再将膨胀做功输入至发电机制动装置2。
氮气透平膨胀机1的工作介质是氮气，氮气透平膨胀机1从下塔42抽取～0.4MPa，95K氮气，所抽取的氮气在板翅式主换热器3中加热至～120K，加热后的氮气由管道接入氮气透平膨胀机1叶轮中膨胀做功后至～0.02Mpa，
～82K，而氮气膨胀做的功通过叶轮及齿轮箱传递至发电机制动装置2，并产生电能。膨胀做功后的氮气由管道接板翅式主换热器，复热至常温，最终引出空分装置。

Claims (6)

1.一种空分装置，包括空气制冷循环***、板翅式主换热器(3)和精馏塔(4)，其特征在于，还包括氮气制冷循环***，所述氮气制冷循环***包括依次连接的氮气透平膨胀机(1)和发电机制动装置(2)，所述氮气透平膨胀机(1)分别与板翅式主换热器(3)、精馏塔(4)相连接。
2.如权利要求1所述的空分装置，其特征在于，所述空气制冷循环***包括依次连接的空气增压机(7)和空气增压透平膨胀机(5)，所述空气增压透平膨胀机(5)分别与板翅式主换热器(3)、精馏塔(4)相连接。
3.如权利要求1所述的空分装置，其特征在于，所述精馏塔(4)包括上塔(41)和下塔(42)，所述上塔(41)和下塔(42)之间设有主冷凝蒸发器(6)。
4.如权利要求1所述的空分装置，其特征在于，所述氮气透平膨胀机(1)和发电机制动装置(2)通过齿轮箱连接。
5.如权利要求1所述的空分装置，其特征在于，所述氮气透平膨胀机(1)与下塔(42)相连接。
6.如权利要求5所述的空分装置，其特征在于，所述氮气透平膨胀机(1)从下塔(42)抽取氮气进行膨胀做功，再将膨胀做功输入至发电机制动装置(2)。
CN201910446615.XA 2019-05-27 2019-05-27 一种空分装置 Pending CN110274438A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910446615.XA CN110274438A (zh) 2019-05-27 2019-05-27 一种空分装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910446615.XA CN110274438A (zh) 2019-05-27 2019-05-27 一种空分装置

Publications (1)

Publication Number Publication Date
CN110274438A true CN110274438A (zh) 2019-09-24

Family

ID=67959079

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910446615.XA Pending CN110274438A (zh) 2019-05-27 2019-05-27 一种空分装置

Country Status (1)

Country Link
CN (1) CN110274438A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112066643A (zh) * 2020-07-28 2020-12-11 上海加力气体有限公司 降低能耗的空气分离工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222756A (en) * 1978-05-12 1980-09-16 Air Products And Chemicals, Inc. Tonnage nitrogen generator
CN1908558A (zh) * 2006-08-03 2007-02-07 西安交通大学 利用空分制冷***的小型天然气液化装置
WO2008059399A2 (en) * 2006-11-16 2008-05-22 L'air Liquide-Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Cryogenic air separation process and apparatus
CN102809262A (zh) * 2012-08-22 2012-12-05 杭州杭氧股份有限公司 一种利用igcc燃气轮机压缩空气生产氧气的方法及装置
CN203454607U (zh) * 2013-01-27 2014-02-26 南京瑞柯徕姆环保科技有限公司 一种等压分离制取氧氮的空分装置
CN106196886A (zh) * 2016-07-13 2016-12-07 浙江智海化工设备工程有限公司 一种新型低能耗氧内压缩氮膨胀无空气膨胀机的空分流程

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222756A (en) * 1978-05-12 1980-09-16 Air Products And Chemicals, Inc. Tonnage nitrogen generator
CN1908558A (zh) * 2006-08-03 2007-02-07 西安交通大学 利用空分制冷***的小型天然气液化装置
WO2008059399A2 (en) * 2006-11-16 2008-05-22 L'air Liquide-Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Cryogenic air separation process and apparatus
CN102809262A (zh) * 2012-08-22 2012-12-05 杭州杭氧股份有限公司 一种利用igcc燃气轮机压缩空气生产氧气的方法及装置
CN203454607U (zh) * 2013-01-27 2014-02-26 南京瑞柯徕姆环保科技有限公司 一种等压分离制取氧氮的空分装置
CN106196886A (zh) * 2016-07-13 2016-12-07 浙江智海化工设备工程有限公司 一种新型低能耗氧内压缩氮膨胀无空气膨胀机的空分流程

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112066643A (zh) * 2020-07-28 2020-12-11 上海加力气体有限公司 降低能耗的空气分离工艺

Similar Documents

Publication Publication Date Title
CN107521698B (zh) 一种环控***余热制冷装置
CN107830651A (zh) 一种低温制冷***
CN201331210Y (zh) 一种带闪发式储分器的低温空气源热泵热水空调器装置
CN203100029U (zh) 机房空调器
CN106440659A (zh) 一种低能耗内压缩空分装置
CN202973654U (zh) 余热回收式双效双温装置
CN206176890U (zh) 低能耗内压缩空分装置
CN102927718B (zh) 一种新型双效双温高温热泵装置
CN110274438A (zh) 一种空分装置
CN103759500A (zh) 一种低能耗制高纯氮的方法及装置
CN202133185U (zh) 一种高温蒸汽热泵***
CN110259537B (zh) 一种二氧化碳朗肯循环动力***及其操作方法
CN103090582A (zh) 一种增压型三相吸收式蓄能装置
CN203190713U (zh) 一种增压型三相吸收式蓄能装置
CN103256081B (zh) 基于超临界空气的能源综合利用方法
CN102654326B (zh) 一种气液喷射器增效的双喷射式制冷装置
CN208443098U (zh) 大液体量制取的空分装置
CN103266952B (zh) 基于超临界空气的能源综合利用***
CN203432208U (zh) 超低压制取高纯氧气和氮气装置
CN206368724U (zh) 一种可调节工况型低温余热发电装置
CN206094279U (zh) 一种屠宰场用制冷机组多级全热回收热水装置
CN113908576A (zh) 精馏塔塔顶余热自驱增压节电装置
CN211261345U (zh) 用于间接空冷***的热量梯级利用***
CN207280082U (zh) 低温不凝气体冷量回收***
CN203429146U (zh) 一种天然气液化过程中脱除重烃的工艺装置

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
RJ01 Rejection of invention patent application after publication

Application publication date: 20190924