CN103299147A - 冷却单元和包括这种冷却单元的用于通过低温蒸馏来分离空气的设备 - Google Patents
冷却单元和包括这种冷却单元的用于通过低温蒸馏来分离空气的设备 Download PDFInfo
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Abstract
本发明涉及一种冷却单元,所述冷却单元包括交换管线(3A,3B)和冷却塔(1),所述交换管线能够通过与用于塔系统的待冷却空气换热而加热源自所述塔系统的氮,所述冷却塔用于被输送至所述塔的顶部的待冷却的水与源自空气蒸馏塔(9)的系统的氮之间的热质交换,所述塔的下部包括连接至氮管道的入口,并且所述氮管道连接至所述交换管线(3A,3B)的至少一个交换器体部,所述交换管线能够通过与用于所述塔系统的待冷却的空气换热而加热源自所述塔系统的氮,其特征在于,所述塔定位在所述交换管线的至少一部分上方。
Description
技术领域
本发明涉及一种冷却单元和一种包括这种冷却单元的用于通过空气蒸馏来分离空气的设备。
背景技术
作者为Frank Kerry的“Industrial Gas Handbook(工业气体手册)”,CRC Press,第112到113页介绍了如何使用冷却塔通过在第一塔中与水直接接触而冷却在蒸馏系统中用于空气分离的空气。空气然后被输送至净化系统,此处空气被干燥并被净化掉二氧化碳。用于冷却的水在第一塔中明显变热。为了冷却用于冷却的水并因此能够使其再循环至第一塔,该水在第二塔中通过与来自空气分离系统的氮直接接触而被冷却。在该第二塔的上游,氮在待蒸馏的空气被冷却下来的交换管线中被加热。正如Kerry指出的,该氮流可构成蒸馏后的空气的相当大一部分。
EP-A-1666822说明了定位在地面上的第一塔和第二塔,该第二塔接近主交换管线的出口。
用于将在所述第二塔中获得的冰水转移至所述第一塔的泵一般安装在该第二塔旁边的地面上。
该第二塔可由具有圆形或方形截面的钢材或混凝土制成。
在生产低压氮的方法的情况下,例如用于为有氧燃烧供给氧的空气分离设备,离开交换管线流向该第二塔的残留氮的管线中的压降很关键,因为该压降决定低压塔(和因此空气压缩机)的压力,该低压塔仅连接至氮与水之间发生热交换的所述第二塔。
所述具有圆形或方形截面的塔将安装在诸如主交换管线的顶部上之类的高度处,以便允许残留氮管线在没有管道弯头并且管道的长度最小的情况下直接进入塔,管道弯头和管道长度这两种特征均产生压降。
该塔可由钢材、混凝土或塑料制成。
该塔优选地能够由交换管线安装在其中的外壳结构的延续部分支承或者由任何其它合适的支承装置支承。
通过使用本发明,可以将压降减小3mbar,并由此使低压塔的压力减小3mbar并且使中压塔的压力减小4mbar。因此,空气的压力同样降低并且空气压缩机的电力消耗下降0.1%。
这种压力的降低是与塔布置在地平面上的现有技术相比在将氮从交换管线输送至冷却塔的管道中消除了三个管道弯头的结果。
发明内容
本发明的一个目的是提供一种冷却单元,所述冷却单元包括交换管线和冷却塔,所述交换管线能够通过与通往塔系统的待冷却空气换热而加热来自所述塔系统的氮,所述冷却塔允许被输送至所述塔的顶部的待冷却的水与来自空气蒸馏塔的系统的氮之间进行热质交换,所述塔的下部包括连接至氮管道的入口并且所述氮管道连接至所述交换管线的至少一个交换器体部,所述交换管线能够通过与通往所述塔系统的待冷却空气换热而加热来自所述塔系统的氮,其特征在于,所述塔定位在所述交换管线的至少一部分的上方。
根据其它可选特征:
-所述塔被支承在所述交换管线的至少一部分上;
-所述塔由安装在所述交换管线的至少一部分上的结构支承;
-所述塔的最下部点位于一个或多个所述交换器体部上方;
-所述氮管道连接至所述冷却塔的罐上方的位置;
-所述单元包括两个交换管线,每一个交换管线均包括若干交换(器)体部,所述两个交换管线优选具有基本相同的高度;
-所述塔由安装在所述两个交换管线上的结构支承;
-所述塔定位在所述两个交换管线之间的空间上方;
-至少一个连接至所述两个交换管线的空气入口管道穿过所述塔下方的所述空间;
-所述氮管道连接至所述交换器体部的上部;
-所述氮管道以氮在不被向下输送的情况下到达所述塔的方式布置;
-所述氮管道在所述交换器体部与所述氮管道之间最多包括一个管道弯头,优选不包括管道弯头;
-所述塔系统包括中压塔和低压塔,并且所述低压塔连接至所述交换管线的体部以向其供给氮。
本发明的另一个目的是提供一种用于通过低温蒸馏来分离空气的设备,所述设备包括如权利要求1至12中任一项所述的单元、塔系统、向所述交换管线输送空气的管道、输送来自所述交换管线的空气的管道和将空气从所述交换管线输送至所述塔系统的管道,所述氮管道连接至所述塔系统。
本发明的又一个目的是提供一种用于使用如权利要求1至12中任一项所述的单元通过低温蒸馏来分离空气的方法,其中空气在所述塔和所述交换管线中被冷却,在塔系统中被分离,氮从所述塔系统被输送至所述交换管线并且从所述交换管线被输送至所述塔。
优选地,在所述交换器体部的出口与所述塔的入口之间的所述氮管道中的压降小于7mbar,优选小于6mbar。
附图说明
现将参照附图更详细地描述本发明,附图描绘了结合在用于通过低温蒸馏来分离空气的装置中的根据本发明的单元。
具体实施方式
冷却单元包括塔1、两个低压交换管线3A、3B和一个高压交换管线5。该空气分离设备另外包括空气涡轮7、蒸馏塔9、11以及管道和阀组件。
空气通过与水直接接触而在塔(未示出)中被冷却,在净化装置中被净化,在交换管线3A、3B中被冷却,经至少一个涡轮7膨胀,并被输送至塔9以被分离。在塔9中产生的流体被输送至塔11,塔11在低于塔9的压力下工作。来自塔11的所产生的氮在交换管线3A、3B中被加热并被输送至冷却塔1,在冷却塔1中,所述氮冷却用于冷却空气的水。
交换管线3A、3B是低压流体交换器并且通过一空间分离。每个交换管线均包括一定数量的体部(在此情况下为八个),所述体部接收待冷却的空气和待加热的氮。
被加热的氮被收集在管道15中,该管道15设置于塔1的底部上方数米处。氮管道15高于其它管道并因此更容易连接至塔1。交换器体部与塔之间的氮管道15上的压降小于7mbar,优选地小于6mbar。
塔1由止靠在两个交换管线3A、3B的端部上的结构13支承。
在塔中被冷却的水用于冷却净化过程上游的空气。
在仅存在一个交换管线的情况下,结构13将止靠在地面上或某一其它元件上。
进水管道和出水管道在图中未示出。
Claims (15)
1.一种冷却单元,包括交换管线(3A、3B)和冷却塔(1),所述交换管线能够通过与通往塔系统的待冷却空气换热而加热来自所述塔系统的氮,所述冷却塔允许被输送至所述冷却塔的顶部的待冷却的水与来自空气蒸馏塔(9,11)的系统的氮之间进行热质交换,所述冷却塔的下部包括连接至氮管道(15)的入口,所述氮管道连接至所述交换管线的至少一个交换器体部,其特征在于,所述冷却塔定位在所述交换管线的至少一部分的上方。
2.如权利要求1所述的单元,其特征在于,所述冷却塔(1)被支承在所述交换管线(3A,3B)的至少一部分上。
3.如权利要求1或2所述的单元,其特征在于,所述冷却塔(1)由安装在所述交换管线(3A,3B)的至少一部分上的结构(13)支承。
4.如前述权利要求中任一项所述的单元,其特征在于,所述冷却塔(1)的最下部点位于所述交换器体部上方。
5.如前述权利要求中任一项所述的单元,其特征在于,所述氮管道连接至所述冷却塔(1)的罐上方的位置。
6.如前述权利要求中任一项所述的单元,其特征在于,所述单元包括两个交换管线(3A,3B),每一交换管线均包括若干交换器体部,所述两个交换管线优选具有基本相同的高度。
7.如权利要求6所述的单元,其特征在于,所述冷却塔(1)由安装在所述两个交换管线(3A,3B)上的结构(13)支承。
8.如权利要求6或7所述的单元,其特征在于,所述冷却塔(1)定位在所述两个交换管线(3A,3B)之间的空间上方。
9.如权利要求8所述的单元,其特征在于,至少一个连接至所述两个交换管线(3A,3B)的空气输入管道在所述冷却塔下方穿过所述空间。
10.如前述权利要求中任一项所述的单元,其特征在于,所述氮管道连接至所述交换器体部的上部。
11.如权利要求10所述的单元,其特征在于,所述氮管道以氮在不被向下输送的情况下到达所述冷却塔(1)的方式布置。
12.如权利要求10或11所述的单元,其特征在于,所述氮管道在所述交换器体部与所述氮管道之间最多包括一个管道弯头。
13.一种用于通过低温蒸馏来分离空气的装置,所述装置包括如前述权利要求中任一项所述的单元、塔系统(9,11)、向所述交换管线(3A,3B)输送空气的管道、输送来自所述交换管线的空气的管道和将空气从所述交换管线输送至所述塔系统的管道,所述氮管道连接至所述塔系统。
14.一种用于使用如前述权利要求中任一项所述的单元通过低温蒸馏来分离空气的方法,其中空气在所述冷却塔和所述交换管线中被冷却,在塔系统中被分离,氮从所述塔系统被输送至所述交换管线并且从所述交换管线被输送至所述冷却塔。
15.如权利要求14所述的方法,其特征在于,所述交换器体部的出口与所述冷却塔的入口之间的所述氮管道中的压降小于7mbar,优选小于6mbar。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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FR1055722A FR2962799B1 (fr) | 2010-07-13 | 2010-07-13 | Ensemble de refroidissement et appareil de separation d'air par distillation cryogenique comprenant un tel ensemble de refroidissement |
FR1055722 | 2010-07-13 | ||
PCT/FR2011/051670 WO2012007691A2 (fr) | 2010-07-13 | 2011-07-12 | Ensemble de refroidissement et appareil de separation d'air par distillation cryogenique comprenant un tel ensemble de refroidissement |
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CN103299147A true CN103299147A (zh) | 2013-09-11 |
CN103299147B CN103299147B (zh) | 2015-10-07 |
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US (1) | US20130111950A1 (zh) |
EP (1) | EP2593739B1 (zh) |
JP (1) | JP5902161B2 (zh) |
CN (1) | CN103299147B (zh) |
FR (1) | FR2962799B1 (zh) |
WO (1) | WO2012007691A2 (zh) |
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WO2015124853A2 (fr) * | 2014-02-24 | 2015-08-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Appareil de séparation d'air par distillation cryogénique à plateforme surélevée |
FR3052243B1 (fr) * | 2016-06-06 | 2019-06-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Assemblage d'elements modulaires de construction d'un appareil d'echange de masse et/ou de chaleur et procede d'echange utilisant un assemblage |
Citations (4)
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EP1398585A1 (fr) * | 2002-09-11 | 2004-03-17 | L'air liquide, Société anonyme à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés G. Claude | Installation de production de grandes quantités d'oxygène et/ou d'azote |
DE10342788A1 (de) * | 2003-09-15 | 2005-04-07 | Linde Ag | Coldbox |
EP1666822A1 (de) * | 2004-12-03 | 2006-06-07 | Linde Aktiengesellschaft | Vorrichtung zur Tieftemperaturzerlegung eines Gasgemisches, insbesondere von Luft |
CN1829887A (zh) * | 2003-07-30 | 2006-09-06 | 液体空气乔治洛德方法利用和研究的具有监督和管理委员会的有限公司 | 利用燃气轮机供给空气分离装置的方法和设备 |
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GB2061478B (en) * | 1979-10-23 | 1983-06-22 | Air Prod & Chem | Method and cryogenic plant for producing gaseous oxygen |
US4496382A (en) * | 1983-03-21 | 1985-01-29 | Air Products And Chemicals, Inc. | Process using serpentine heat exchange relationship for condensing substantially single component gas streams |
JPH0721378B2 (ja) * | 1985-08-12 | 1995-03-08 | 大同ほくさん株式会社 | 酸素ガス製造装置 |
JP2551461B2 (ja) * | 1988-07-04 | 1996-11-06 | 日本酸素 株式会社 | 空気分離装置における原料空気の前処理方法 |
US5275004A (en) * | 1992-07-21 | 1994-01-04 | Air Products And Chemicals, Inc. | Consolidated heat exchanger air separation process |
US20020067041A1 (en) * | 2000-08-30 | 2002-06-06 | Collins James Christopher | Compressor air piping system and method |
US7296437B2 (en) * | 2002-10-08 | 2007-11-20 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for separating air by cryogenic distillation and installation for implementing this process |
GB0307404D0 (en) * | 2003-03-31 | 2003-05-07 | Air Prod & Chem | Apparatus for cryogenic air distillation |
US6732544B1 (en) * | 2003-05-15 | 2004-05-11 | Praxair Technology, Inc. | Feed air precooling and scrubbing system for cryogenic air separation plant |
FR2880418B1 (fr) * | 2004-12-30 | 2007-04-27 | Air Liquide | Ensemble d'echangeurs de chaleur, appareil de distillation cryogenique incorporant un tel ensemble et procede de distillation cryogenique utilisant un tel ensemble |
-
2010
- 2010-07-13 FR FR1055722A patent/FR2962799B1/fr not_active Expired - Fee Related
-
2011
- 2011-07-12 EP EP11741665.1A patent/EP2593739B1/fr not_active Not-in-force
- 2011-07-12 US US13/808,946 patent/US20130111950A1/en not_active Abandoned
- 2011-07-12 CN CN201180034155.1A patent/CN103299147B/zh not_active Expired - Fee Related
- 2011-07-12 JP JP2013519137A patent/JP5902161B2/ja not_active Expired - Fee Related
- 2011-07-12 WO PCT/FR2011/051670 patent/WO2012007691A2/fr active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1398585A1 (fr) * | 2002-09-11 | 2004-03-17 | L'air liquide, Société anonyme à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés G. Claude | Installation de production de grandes quantités d'oxygène et/ou d'azote |
CN1829887A (zh) * | 2003-07-30 | 2006-09-06 | 液体空气乔治洛德方法利用和研究的具有监督和管理委员会的有限公司 | 利用燃气轮机供给空气分离装置的方法和设备 |
DE10342788A1 (de) * | 2003-09-15 | 2005-04-07 | Linde Ag | Coldbox |
EP1666822A1 (de) * | 2004-12-03 | 2006-06-07 | Linde Aktiengesellschaft | Vorrichtung zur Tieftemperaturzerlegung eines Gasgemisches, insbesondere von Luft |
Also Published As
Publication number | Publication date |
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US20130111950A1 (en) | 2013-05-09 |
JP2014500937A (ja) | 2014-01-16 |
CN103299147B (zh) | 2015-10-07 |
FR2962799A1 (fr) | 2012-01-20 |
EP2593739B1 (fr) | 2017-04-12 |
WO2012007691A3 (fr) | 2013-10-10 |
EP2593739A2 (fr) | 2013-05-22 |
FR2962799B1 (fr) | 2014-07-04 |
WO2012007691A2 (fr) | 2012-01-19 |
JP5902161B2 (ja) | 2016-04-13 |
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