CN106642987A - 一种同心复合式空分系统 - Google Patents

一种同心复合式空分系统 Download PDF

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Publication number
CN106642987A
CN106642987A CN201611262904.7A CN201611262904A CN106642987A CN 106642987 A CN106642987 A CN 106642987A CN 201611262904 A CN201611262904 A CN 201611262904A CN 106642987 A CN106642987 A CN 106642987A
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tower
argon
condenser
oxygen
reboiler
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CN106642987B (zh
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谭兆钧
原现杰
王星星
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North China University of Water Resources and Electric Power
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North China University of Water Resources and Electric Power
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    • 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
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04072—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of argon or argon enriched 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
    • 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
    • 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
    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon 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
    • F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
    • F25J3/04933—Partitioning walls or sheets
    • F25J3/04939—Vertical, e.g. dividing wall columns

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

一种同心复合式空分系统，包括上塔、下塔以及氩塔，下塔顶部和底部分别设冷凝器Ⅱ和再沸器Ⅱ，氩塔底部设再沸器Ⅰ，下塔、上塔与氩塔之间设换热器，所述氩塔为圆环柱状，套设在上塔周围，冷凝器Ⅰ设置在上塔顶部，冷凝器Ⅰ与氩塔相通。本发明的有益效果是：1减小占地面积，将氩塔结构变为圆环柱状，与上塔装配在一起，整个空分系统需求的面积下降；2简化管道布置，因氩塔与上塔装配在一起，因此两者之间管道的长度大幅减少，管道更为紧凑。

Description

一种同心复合式空分系统
技术领域
本发明属于空气分离技术领域，具体涉及一种同心复合式空分系统。
背景技术
当前的空分系统中，用于分离空气的上塔和下塔与用于分离氩气的氩塔一般是分离的，主塔和氩塔通过管道连接到一起；这种主塔与氩塔分离的形式不足之处在于占地面积增大，主塔和氩塔间管道连接复杂。
发明内容
针对上述问题，本发明提出一种同心复合式空分系统，本发明的目的是以下述方式实现的：
一种同心复合式空分系统，包括上塔、下塔以及氩塔，下塔顶部和底部分别设冷凝器Ⅱ和再沸器Ⅱ，氩塔底部设再沸器Ⅰ，下塔、上塔与氩塔之间设换热器，所述氩塔为圆环柱状，套设在上塔周围，冷凝器Ⅰ设置在上塔顶部，冷凝器Ⅰ与氩塔相通。
其连接方式为：空气从下塔底部进入再沸器Ⅱ，再沸器Ⅱ抽出富氧液空通过换热器换热后进入冷凝器Ⅰ，冷凝器Ⅱ中产生的液氮通过换热器对富氧液空进行过冷，之后流入上塔作为回流液，冷凝器Ⅰ中的富氧液空与液空蒸汽流入上塔进一步精馏氧，上塔偏下部位抽出氧气和氩气混合气体进入氩塔以分离氩，氩塔底部再沸器Ⅰ中的液氧回流上塔，上塔底部的氧气作为产品输出，氩气在氩塔顶部被冷凝器Ⅰ冷凝为液氩，并作为产品输出。
本发明的有益效果是：1减小占地面积，将氩塔结构变为圆环柱状，与上塔装配在一起，整个空分系统需求的面积下降；2简化管道布置，因氩塔与上塔装配在一起，因此两者之间管道的长度大幅减少，管道更为紧凑。
附图说明
图1是本发明空分系统的结构示意图；
图2是图1的E-E向视图。
具体实施方式
本发明提供的一种同心复合式空分系统，如图1-2所示，包括上塔1、下塔2以及氩塔3，下塔2顶部和底部分别设冷凝器Ⅱ5B和再沸器Ⅱ4B，氩塔3底部设再沸器Ⅰ4A，下塔、上塔与氩塔之间设换热器6，所述氩塔为圆环柱状，套设在上塔周围，冷凝器Ⅰ5A设置在上塔顶部，冷凝器Ⅰ5A与氩塔3相通。
现有技术中氩塔3与上塔1分开布置，考虑到管道的热胀冷缩作用，占据空间较大，冷箱占地面积增加30%以上，由于占地面积的增加和管道设计的难度增加，常规设计经常放弃氩塔，但是氩塔可使上塔的氧气提取率增加4%，对整套空分装置来说，节能4%，因此，本发明将氩塔3和上塔2设计成同心强化精馏塔，避免了复杂的低温设计，节省了占地面积，降低管道排布的难度，使强化精馏工艺更容易被推广。
本发明的工作流程如下：空气从下塔2底部进入再沸器Ⅱ4B，再沸器Ⅱ4B抽出富氧液空在换热器中被冷凝器Ⅱ5B中产生的液氮过冷，之后作为冷凝液流入冷凝器Ⅰ5A中，液氮之后流入上塔1作为回流液；冷凝器Ⅰ5A中的富氧液空冷凝氩塔3底部产生的氩气之后一部分会变成液空蒸汽，富氧液空与液空蒸汽流入上塔1进一步精馏氧，以提纯氧气，由于上塔1偏下部位氩的摩尔分数较高，因此从上塔1偏下部位抽出部分氧气和氩气混合气体进入氩塔3以分离氩，氩塔3底部再沸器Ⅰ4A中几乎是纯氧气体，将其输回上塔1，上塔1底部的氧气作为产品输出，氩气在氩塔3顶部被冷凝器Ⅰ5A中的富氧液空冷凝为液氩，并作为产品输出。
以上所述的仅是本发明的优选实施方式，应当指出，对于本领域的技术人员来说，在不脱离本发明整体构思前提下，还可以作出若干改变和改进，这些也应该视为本发明的保护范围。

Claims (2)

1.一种同心复合式空分系统，包括上塔、下塔以及氩塔，下塔顶部和底部分别设冷凝器Ⅱ和再沸器Ⅱ，氩塔底部设再沸器Ⅰ，下塔、上塔与氩塔之间设换热器，其特征在于：所述氩塔为圆环柱状，套设在上塔周围，冷凝器Ⅰ设置在上塔顶部，冷凝器Ⅰ与氩塔相通。
2.如权利要求1所述的同心复合式空分系统，其特征在于其连接方式为：空气从下塔底部进入再沸器Ⅱ，再沸器Ⅱ抽出富氧液空通过换热器换热后进入冷凝器Ⅰ，冷凝器Ⅱ中产生的液氮通过换热器对富氧液空进行过冷，之后流入上塔作为回流液，冷凝器Ⅰ中的富氧液空与液空蒸汽流入上塔进一步精馏氧，上塔偏下部位抽出氧气和氩气混合气体进入氩塔以分离氩，氩塔底部再沸器Ⅰ中的液氧回流上塔，上塔底部的氧气作为产品输出，氩气在氩塔顶部被冷凝器Ⅰ冷凝为液氩，并作为产品输出。
CN201611262904.7A 2016-12-30 2016-12-30 一种同心复合式空分系统 Expired - Fee Related CN106642987B (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019040251A1 (en) * 2017-08-25 2019-02-28 Praxair Technology, Inc. AN ANNULAR DIVIDED WALL COLUMN FOR AN AIR SEPARATION UNIT
US10684071B2 (en) 2017-08-25 2020-06-16 Praxair Technology, Inc. Annular divided wall column for an air separation unit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1118061A (zh) * 1994-06-17 1996-03-06 英国氧气集团有限公司 空气分离
DE19620653C1 (de) * 1996-05-22 1997-06-19 Linde Ag Verfahren und Vorrichtung zum getrennten Speichern von wenigstens zwei unterschiedlichen, tiefsiedenden verflüssigten Gasen
CN1243940A (zh) * 1998-08-05 2000-02-09 普拉塞尔技术有限公司 低温精馏环形塔

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1118061A (zh) * 1994-06-17 1996-03-06 英国氧气集团有限公司 空气分离
DE19620653C1 (de) * 1996-05-22 1997-06-19 Linde Ag Verfahren und Vorrichtung zum getrennten Speichern von wenigstens zwei unterschiedlichen, tiefsiedenden verflüssigten Gasen
CN1243940A (zh) * 1998-08-05 2000-02-09 普拉塞尔技术有限公司 低温精馏环形塔

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019040251A1 (en) * 2017-08-25 2019-02-28 Praxair Technology, Inc. AN ANNULAR DIVIDED WALL COLUMN FOR AN AIR SEPARATION UNIT
US10578355B2 (en) 2017-08-25 2020-03-03 Praxair Technology, Inc. Annular divided wall column for an air separation unit
US10578357B2 (en) 2017-08-25 2020-03-03 Praxair Technology, Inc. Annular divided wall column with ring shaped collectors and distributers for an air separation unit
US10578356B2 (en) 2017-08-25 2020-03-03 Praxair Technology, Inc. Annular divided wall column for an air separation unit having a ring shaped support grid
KR20200042488A (ko) * 2017-08-25 2020-04-23 프랙스에어 테크놀로지, 인코포레이티드 공기 분리 유닛을 위한 환형 분할식 벽 칼럼
US10684071B2 (en) 2017-08-25 2020-06-16 Praxair Technology, Inc. Annular divided wall column for an air separation unit
US10866025B2 (en) 2017-08-25 2020-12-15 Praxair Technology, Inc. Annular divided wall column with ring shaped collectors and distributers
US10866026B2 (en) 2017-08-25 2020-12-15 Praxair Technology, Inc. Annular divided wall column
US10928129B2 (en) 2017-08-25 2021-02-23 Praxair Technology, Inc. Annular divided wall column
KR102338732B1 (ko) 2017-08-25 2021-12-13 프랙스에어 테크놀로지, 인코포레이티드 공기 분리 유닛을 위한 환형 분할식 벽 칼럼

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