公开(公告)号：WO2015171210A3

公开(公告)日：2016-03-24

申请号：PCT/US2015022371

申请日：2015-03-25

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： SHELAT MAULIK R ,  KIBLER KARL K ,  HOHL RACHEL M

IPC: F25J5/00 ,  F25J3/04

CPC classification number: F25J3/0423 ,  F25J3/04963 ,  F25J5/002 ,  F25J2290/34 ,  F25J2290/50 ,  F28D7/0066 ,  F28D9/0093 ,  F28D2021/0033

Abstract: A sub-cooler type heat exchanger assembly and system for use in a cryogenic air separation plant is provided. The sub-cooler type heat exchanger includes at least two separate heat exchange segments within the same housing or shell and is configured to concurrently cool two or more upward flowing cryogenic liquids using nitrogen-rich streams from the lower pressure distillation column.

Abstract translation: 提供了一种用于低温空气分离装置的副冷却器型热交换器组件和系统。 副冷却器型热交换器在相同壳体或外壳内包括至少两个单独的热交换段，并且构造成使用来自低压蒸馏塔的富氮流同时冷却两个或更多个向上流动的低温液体。

公开(公告)号：WO2007057730A1

公开(公告)日：2007-05-24

申请号：PCT/IB2006/000215

申请日：2006-02-03

Applicant: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE ,  JUDAS, Frederic

Inventor： JUDAS, Frederic

IPC: F25J3/04

CPC classification number: F25J3/04945 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/04218 ,  F25J3/0423 ,  F25J3/04236 ,  F25J3/04412 ,  F25J3/04448 ,  F25J3/04787 ,  Y10S62/903

Abstract: This disclosure discusses the problems associated with the design, layout, and construction of units and equipment in air separation units. The invention of this disclosure provides a process and apparatus using multiple discrete subcoolers (12, 14). The nitrogen stream (10) exiting the cryogenic distillation columns cools streams (20, 22, 24, 26) in the subcoolers. By having at :.east two subcoolers, the size of the nitrogen vent (nitrogen waste or product stream) can be reduced. This saves fabrication costs and improves reliability by reducing thermal stresses in the piping and equipment. Subcoolers cool rich liquid, lean liquid, liquid oxygen, and/or liquid air streams coding from the main heat exchanger (8) or a system of separation columns. The disclosure also discusses integration of the subcoolers with the main heat exchangers.

Abstract translation: 本公开内容讨论了与分离单元中的设备和设备的设计，布局和构造有关的问题。 本公开的发明提供了一种使用多个分立的过冷却器（12,14）的方法和装置。 离开低温蒸馏塔的氮气流（10）冷却过冷却器中的物流（20,22,24,26）。 通过在以下两个过冷却器中，可以减少氮气排放口的大小（氮废物或产物流）。 这通过减少管道和设备中的热应力来节省制造成本并提高可靠性。 冷却器冷却从主热交换器（8）或分离塔系统编码的富含液体，贫液，液氧和/或液体空气流。 本公开还讨论了过冷却器与主热交换器的集成。

公开(公告)号：WO2009020686A3

公开(公告)日：2010-09-16

申请号：PCT/US2008064037

申请日：2008-05-19

Applicant: PRAXAIR TECHNOLOGY INC ,  PROSSER NEIL MARK ,  JIBB RICHARD JOHN

Inventor： PROSSER NEIL MARK ,  JIBB RICHARD JOHN

IPC: F25J3/04

CPC classification number: F25J3/04187 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/04218 ,  F25J3/0423 ,  F25J3/04236 ,  F25J3/04303 ,  F25J3/04387 ,  F25J3/04412 ,  F25J3/04678 ,  F25J5/00 ,  F25J2240/10 ,  F25J2290/12 ,  F25J2290/32 ,  F25J2290/44

Abstract: A compressed air stream is cooled to a temperature suitable for its rectification within a lower pressure heat exchanger (28) and a boosted pressure air stream is liquefied or converted to a dense phase fluid within a higher pressure heat exchanger (26) in order to vaporize pumped liquid products. Thermal balancing within the plant is effectuated with the use of waste nitrogen streams (110, 108) that are introduced into the higher and lower pressure heat exchangers. The heat exchangers are configured such that the flow area for the subsidiary waste nitrogen stream within the higher pressure heat exchanger (26) is less than that would otherwise be required so that the subsidiary waste nitrogen streams were subjected to equal pressure drops in the higher and lower pressure heat exchangers. This allows the higher pressure heat exchanger (26) be fabricated with a reduced height and therefore a decrease in fabrication costs.

Abstract translation: 将压缩空气流冷却至适于在低压热交换器（28）内进行精馏的温度，并且将增压压力空气流液化或转化为高压热交换器（26）内的致密相流体，以便蒸发 泵送液体产品。 使用引入到较高压力和低压热交换器中的废氮气流（110,108）来实现设备内的热平衡。 热交换器被配置为使得较高压力热交换器（26）内的辅助废氮流的流动面积小于另外需要的流动面积，使得辅助废氮气流在较高的和 低压热交换器。 这允许制造具有降低的高度的高压热交换器（26），从而降低制造成本。

公开(公告)号：WO2009020686A2

公开(公告)日：2009-02-12

申请号：PCT/US2008/064037

申请日：2008-05-19

Applicant: PRAXAIR TECHNOLOGY, INC. ,  PROSSER, Neil, Mark ,  JIBB, Richard, John

Inventor： PROSSER, Neil, Mark ,  JIBB, Richard, John

CPC classification number: F25J3/04187 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/04218 ,  F25J3/0423 ,  F25J3/04236 ,  F25J3/04303 ,  F25J3/04387 ,  F25J3/04412 ,  F25J3/04678 ,  F25J5/00 ,  F25J2240/10 ,  F25J2290/12 ,  F25J2290/32 ,  F25J2290/44

Abstract: A compressed air stream is cooled to a temperature suitable for its rectification within a lower pressure heat exchanger and a boosted pressure air stream is liquefied or converted to a dense phase fluid within a higher pressure heat exchanger in order to vaporize pumped liquid products. Thermal balancing within the plant is effectuated with the use of waste nitrogen streams that are introduced into the higher and lower pressure heat exchangers. The heat exchangers are configured such that the flow area for the subsidiary waste nitrogen stream within the higher pressure heat exchanger is less than that would otherwise be required so that the subsidiary waste nitrogen streams were subjected to equal pressure drops in the higher and lower pressure heat exchangers. This allows the higher pressure heat exchanger be fabricated with a reduced height and therefore a decrease in fabrication costs.

Abstract translation: 将压缩空气流冷却到适合于在低压热交换器内进行精馏的温度，并且在高压热交换器中将增压空气流液化或转化成致密相流体，以便蒸发泵送的液体产物。 使用引入高压和低压热交换器的废氮气流来实现设备内的热平衡。 热交换器被构造成使得在高压热交换器内的辅助废氮流的流动面积小于另外需要的流动面积，使得辅助废氮流在较高和较低的压力热中受到相等的压降 器。 这允许以较低的高度制造高压热交换器，因此制造成本降低。

公开(公告)号：WO1998019122A1

公开(公告)日：1998-05-07

申请号：PCT/EP1997006010

申请日：1997-10-30

Applicant: LINDE AKTIENGESELLSCHAFT ,  CORDUAN, Horst ,  ROTTMANN, Dietrich ,  VOIT, Jürgen ,  KUNZ, Christian ,  HAAG, Wolfgang

Inventor： LINDE AKTIENGESELLSCHAFT

IPC: F25J03/04

CPC classification number: F25J3/04212 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/04103 ,  F25J3/04224 ,  F25J3/0423 ,  F25J3/04236 ,  F25J3/04284 ,  F25J3/04303 ,  F25J3/04321 ,  F25J3/04412 ,  F25J3/04418 ,  F25J3/04424 ,  F25J3/04872 ,  F25J3/04878 ,  F25J3/04884 ,  F25J2200/52 ,  F25J2200/54 ,  F25J2200/90 ,  F25J2235/02 ,  F25J2235/42 ,  F25J2245/42 ,  F25J2245/50 ,  F25J2250/04 ,  F25J2250/10 ,  F25J2250/20 ,  F25J2250/42 ,  F25J2250/50 ,  F25J2250/52

Abstract: The present invention concerns a method and device for producing compressed nitrogen by air classification at a low temperature in a rectifying apparatus presenting a pressure column (4) and a low pressure column (5). The air used (1, 3) is introduced in the pressure column (4). A liquid fraction containing oxygen is taken from the pressure column (4) and introduced in the low pressure column (5). The gas nitrogen (18) from the low pressure column (5) is condensed, at least partially, in a head capacitor through indirect heat transfer using an evaporating liquid (13). In order for the nitrogen from the pressure column to be obtained in the form of a compressed gas (24, 24, 29), a pressure is used which is higher than that needed for the operation of the low pressure column (5). The nitrogen (20) bleed from the low pressure column is exposed in that liquid state to a pressure higher than that of the low pressure column (5). The liquid (22) put under pressure is evaporated in an evaporator (23) through direct heat transfer involving a heat carrier (35), which produces a gaseous compressed nitrogen (24, 25, 29).

Abstract translation: 该方法和装置用于在一个精馏系统具有高压塔（4）和低压（5）塔的空气的低温分馏产生加压的氮气。 进料空气（1,3）被引入到高压塔（4）。 含氧液体馏分（11）被从高压塔（4）中除去，并在低压塔（5）被供给。 从在塔顶冷凝器（17）通过与蒸发的液体（13）至少部分冷凝进行间接热交换的低压塔（5）的气态氮（18）。 氮气从低压塔作为压力比低压塔（5）的操作压力下更高得到的气态加压氮气产品（24，25，29）。 从低压塔中排出液态氮（20）被带入液体状态到超过低压（5）塔的压力的压力（21）。 ，带给压力流体（22），在一个产品蒸发器（23）通过与热载流子（35），然后作为气态加压氮气产品（24，25，29）中回收的间接热交换被蒸发。

公开(公告)号：WO1990008932A1

公开(公告)日：1990-08-09

申请号：PCT/US1990000450

申请日：1990-01-26

Applicant: PACIFIC CONSOLIDATED INDUSTRIES

Inventor： PACIFIC CONSOLIDATED INDUSTRIES ,  ZARATE, Robert, A. ,  SELF, Richard, E. ,  SMITH, Lee, W.

IPC: F25J03/02

CPC classification number: F25J3/04945 ,  B01D53/0473 ,  B01D53/261 ,  B01D2253/108 ,  B01D2256/10 ,  B01D2256/12 ,  B01D2257/40 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2257/7022 ,  B01D2257/7025 ,  B01D2257/80 ,  B01D2259/40001 ,  B01D2259/40007 ,  B01D2259/40052 ,  B01D2259/40079 ,  B01D2259/402 ,  B01D2259/416 ,  F25J3/04169 ,  F25J3/04193 ,  F25J3/0423 ,  F25J3/0429 ,  F25J3/04412 ,  F25J3/04775 ,  F25J3/04866 ,  F25J3/04878 ,  F25J3/0489 ,  F25J3/04963 ,  F25J3/04975 ,  F25J5/002 ,  F25J2200/90 ,  F25J2205/64 ,  F25J2205/84 ,  F25J2215/40 ,  F25J2235/50 ,  F25J2240/02 ,  F25J2245/50 ,  F25J2250/42 ,  F25J2250/50 ,  F25J2290/42 ,  F25J2290/62 ,  F25J2290/70 ,  Y02C10/08 ,  Y02C20/20 ,  Y10S62/908 ,  Y10S62/939

Abstract: An apparatus for producing high purity oxygen and nitrogen in the liquid and gaseous phases. The apparatus is a modular, mobile system employing a low design operating pressure. The system purifies ambient air through filters (100) and a dual immobilized fixed bed molecular sieve type pressure swing adsorber (150) prior to the cryogenic distillation of the air. Through the incorporation of the pressure swing adsorber (150) having a high frequency regeneration cycle, the disclosed system provides a reduced system size. The configured system employs waste gas from the distillation process to purge the pressure swing adsorber (150). The cryogenic distillation procedure includes a heat exchanger (300), a turboexpander (350), high (400) and low pressure distillation columns, a subcooler (480) and a condenser.

Abstract translation: 用于在液相和气相中产生高纯氧和氮的装置。 该设备是采用低设计操作压力的模块化移动系统。 该系统在空气的低温蒸馏之前通过过滤器（100）和双固定固定床分子筛型变压吸附器（150）净化环境空气。 通过并入具有高频再生循环的变压吸附器（150），所公开的系统提供减小的系统尺寸。 配置的系统使用来自蒸馏过程的废气来吹扫压力挥发吸附器（150）。 低温蒸馏程序包括热交换器（300），涡轮膨胀机（350），高（400）和低压蒸馏塔，过冷却器（480）和冷凝器。

公开(公告)号：WO2013052288A3

公开(公告)日：2015-09-17

申请号：PCT/US2012056503

申请日：2012-09-21

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： HOWARD HENRY EDWARD

IPC: F25J3/00

CPC classification number: F25J3/0409 ,  F25J3/0423 ,  F25J3/04303 ,  F25J3/04412 ,  F25J3/04678

Abstract: A cryogenic air separation method and apparatus in which a lower pressure distillation column is configured to receive, at successively higher locations of the lower pressure column and at successively lower temperatures, crude oxygen derived from a crude liquid oxygen stream discharged from a higher pressure column, an intermediate reflux stream and a nitrogen-rich reflux stream. All of the streams are subcooled and depressurized. The subcooling is conducted such that the intermediate reflux stream and the nitrogen-rich liquid stream cocurrently, indirectly exchange heat to a nitrogen-rich vapor stream withdrawn from the lower pressure column and the intermediate reflux stream is subcooled to a temperature between the temperatures over which the nitrogen-rich liquid stream is subcooled. Additionally, the crude liquid oxygen stream and the intermediate reflux stream can, cocurrently, indirectly exchange heat to a pressurized liquid stream used in forming an oxygen product and the nitrogen-rich vapor stream.

Abstract translation: 一种低温空气分离方法和装置，其中低压蒸馏塔被配置为在较低压力塔的连续较高位置处并且在相继较低的温度下接收来自高压塔排出的粗液氧流的粗氧， 中等回流流和富氮回流流。 所有的流都被过冷和减压。 进行过冷，使得中间回流物流和富氮液体流并流地间接地将热量从从低压塔排出的富氮蒸气流交换，并将中间回流物流过冷至其温度 将富氮液体物流过冷却。 此外，粗液氧流和中间回流可以并流地间接地将热量与用于形成氧产物和富氮蒸气流的加压液体流交换。

公开(公告)号：WO2011071658A3

公开(公告)日：2015-01-22

申请号：PCT/US2010056501

申请日：2010-11-12

Applicant: PRAXAIR TECHNOLOGY INC ,  HOWARD HENRY EDWARD ,  JIBB RICHARD JOHN

Inventor： HOWARD HENRY EDWARD ,  JIBB RICHARD JOHN

IPC: F25J3/04

CPC classification number: F25J3/04084 ,  F25J3/0409 ,  F25J3/04175 ,  F25J3/0423 ,  F25J3/04296 ,  F25J3/04412 ,  F25J3/04872 ,  F25J3/04951 ,  F25J3/04957 ,  F25J3/04963 ,  F25J2200/32 ,  F25J2205/30 ,  F25J2245/42

Abstract: A method and apparatus for producing an oxygen product in which air is separated in an installation including air separation units having higher and lower pressure columns. A pumped liquid stream generated within the installation, that can be a pumped liquid oxygen stream, is warmed within a main heat exchanger through indirect heat exchange with a compressed air stream to produce a liquid air stream. An impure oxygen stream is rectified within an auxiliary column to produce an oxygen containing stream that is introduced into the lower pressure column of each of the air separation units and intermediate liquid streams, composed of the liquid air stream or another air-like stream, reflux the lower pressure columns and the auxiliary column and optionally the higher pressure column of each of the air separation units.

Abstract translation: 一种用于生产氧气产品的方法和装置，其中在包括具有较高和较低压力柱的空气分离单元的设备中分离空气。 在安装中产生的可以是泵送的液氧流的泵送液体流通过与压缩空气流的间接热交换而在主热交换器内被加热以产生液体空气流。 将不纯的氧气流在辅助塔内进行精馏以产生含氧物流，该物流被引入每个空气分离单元的低压塔和由液体空气流或另一类空气流组成的中间液体流 每个空气分离单元的低压塔和辅助塔以及任选的高压塔。

公开(公告)号：WO2011071658A2

公开(公告)日：2011-06-16

申请号：PCT/US2010/056501

申请日：2010-11-12

Applicant: PRAXAIR TECHNOLOGY, INC. ,  HOWARD, Henry, Edward ,  JIBB, Richard, John

Inventor： HOWARD, Henry, Edward ,  JIBB, Richard, John

IPC: F25J3/04

CPC classification number: F25J3/04084 ,  F25J3/0409 ,  F25J3/04175 ,  F25J3/0423 ,  F25J3/04296 ,  F25J3/04412 ,  F25J3/04872 ,  F25J3/04951 ,  F25J3/04957 ,  F25J3/04963 ,  F25J2200/32 ,  F25J2205/30 ,  F25J2245/42

Abstract: A method and apparatus for producing an oxygen product in which air is separated in an installation including air separation units having higher and lower pressure columns. A pumped liquid stream generated within the installation, that can be a pumped liquid oxygen stream, is warmed within a main heat exchanger through indirect heat exchange with a compressed air stream to produce a liquid air stream. An impure oxygen stream is rectified within an auxiliary column to produce an oxygen containing stream that is introduced into the lower pressure column of each of the air separation units and intermediate liquid streams, composed of the liquid air stream or another air-like stream, reflux the lower pressure columns and the auxiliary column and optionally the higher pressure column of each of the air separation units.

Abstract translation: 一种用于生产氧气产品的方法和装置，其中在包括具有较高和较低压力柱的空气分离单元的设备中分离空气。 在安装中产生的可以是泵送的液氧流的泵送液体流通过与压缩空气流的间接热交换而在主热交换器内被加热以产生液体空气流。 将不纯的氧气流在辅助塔内进行精馏以产生含氧物流，该物流被引入每个空气分离单元的低压塔和由液体空气流或另一类空气流组成的中间液体流 每个空气分离单元的低压塔和辅助塔以及任选的高压塔。

公开(公告)号：WO2009064578A2

公开(公告)日：2009-05-22

申请号：PCT/US2008080097

申请日：2008-10-16

Applicant: PRAXAIR TECHNOLOGY INC ,  HOWARD HENRY EDWARD

IPC: F25J3/04

CPC classification number: F25J3/0257 ,  F25J3/0423 ,  F25J3/04236 ,  F25J3/04284 ,  F25J3/04296 ,  F25J3/044 ,  F25J3/04781 ,  F25J3/04812 ,  F25J3/04836 ,  F25J2200/72 ,  F25J2230/40 ,  F25J2240/02

Abstract: A method of producing a liquid product stream, for example, a liquid nitrogen product stream, at a production rate that is selectively varied. This variation is produced in either a waste expansion or air expansion process by increasing the pressure and flow rate of the feed stream during periods in which a high rate of liquid production is desired without substantially increasing the pressure of the exhaust stream produced by a variable speed turboexpander. This increases the expansion ratio across the turboexpander and therefore the refrigeration supplied to increase liquid production. At the same time, the increase in flow rate prevents a decrease in the performance of the variable speed turboexpander.

Abstract translation: 以选择性变化的生产速率生产液体产物流，例如液氮产物流的方法。 这种变化通过在期望的液体生产率高的时段期间增加进料流的压力和流速而在废物膨胀或空气膨胀过程中产生，而基本上不增加由可变速度产生的废气流的压力 透平膨胀机。 这增加了涡轮膨胀机上的膨胀比，因此提高了制冷量以增加液体产量。 同时，流量的增加可以防止变速涡轮膨胀机的性能下降。