CN1125910A - 通过吸附生产气体的方法 - Google Patents
通过吸附生产气体的方法 Download PDFInfo
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- CN1125910A CN1125910A CN95190243.1A CN95190243A CN1125910A CN 1125910 A CN1125910 A CN 1125910A CN 95190243 A CN95190243 A CN 95190243A CN 1125910 A CN1125910 A CN 1125910A
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- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000001179 sorption measurement Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000006096 absorbing agent Substances 0.000 claims description 25
- 230000004087 circulation Effects 0.000 claims description 19
- 230000002411 adverse Effects 0.000 claims description 10
- 238000010828 elution Methods 0.000 claims description 7
- 230000006837 decompression Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000003463 adsorbent Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims 1
- 239000002156 adsorbate Substances 0.000 claims 1
- 238000005086 pumping Methods 0.000 abstract 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000013587 production medium Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/0476—Vacuum pressure swing adsorption
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/12—Oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40028—Depressurization
- B01D2259/4003—Depressurization with two sub-steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40058—Number of sequence steps, including sub-steps, per cycle
- B01D2259/40067—Seven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40077—Direction of flow
- B01D2259/40081—Counter-current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/403—Further details for adsorption processes and devices using three beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/41—Further details for adsorption processes and devices using plural beds of the same adsorbent in series
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
在一种所谓的“真空”循环中通过与循环低压第二吸附器出口连接进行循环高压第一吸附器的减压过程，这一连接通过逆流泵首先应用于第二吸收器，其次连接在第一吸收器上，通过产出的气体进行再压缩直至循环高压为止。
该方法适用于由空气生产氧气。
Description
本发明涉及一种通过在含有三个吸附器的吸附装置中进行吸附由气体混合物中获取难以吸附气体的生产方法，对于每一个吸附器来说，进行包含下列步骤的循环：
a)在高循环压力下以基本上等压过程生产上述气体；
b)并流减压至中压；
c)最终逆流减压至循环低压；
d)借助来自b)阶段中另一吸附器的逆流气体进行洗提；和
e)借助产生气体逆流地再次加压至循环高压。
由文献US—A—3176444所述基础循环演变而来的这些循环包括一个相当长的洗提步骤，具体地被用于由空气生产中等纯度氧气。
本发明的目的在于提供一种能够在不追加投资而仅仅对循环控制程序作简单改进的条件下生产纯度高于90％的氧气的方法，其性能得到明显改进而能量消耗却明显降低。
为此，根据本发明特征初始减压步骤b)包括一个处在阶段C之前，以逆流方式完成减压过程的第二阶段b2，洗提d)之后有借助来自阶段b2的另一吸附器中的气体进行逆流再压缩阶段f)。
依据本发明的另一特征。
循环低压低于大气压，典型地低于0.5×105帕，循环压力一般略高于大气压；
采用泵进行步骤b2、c)和d)中的逆流排液过程。
借助描述性但非限定性实施方案并结合附图可以明了本发明的其它特征与优点，其中；
该图以压力/时间曲线示意本发明方法中的一个循环过程。
下文中，“并流”表明在制备过程中流体的循环方向相同，“逆流”表明方向相反。
图中循环对应于中等纯度氧气生产装置，其中包括三个吸附器，它们吸入口有选择性地连接在待分离的气体混合物鼓风机上和至少一个用于减压及再生吸附剂的洗提过程的真空泵上。
如图所示，循环T包括下列步骤：
a)由t＝0至T/3，在循环高压Ph下以基本上等压的方式于吸附器出口处生产氧气的步骤，其入口处空气进料压力为Ph；
b1)由T/3至t1，处于循环高压下的吸附器出口被封闭，其出口与另一处于循环低压Pb的另一吸附器出口相连，后者吸入口与真空泵连接，逆流洗提，由2T/3至t3，在后一吸附器中完成第一次再压缩过程；
b2)由t1至t2，两个吸附器出口保持接触，通过第一吸附器进口与真空泵相连而完成的逆流排液进行第一吸附器的减压，t3之后真空泵与另一吸附器脱离，借助来自如上所述第一吸附器的纯气体后一吸附器继续其逆流再压缩过程直至t4为止；
c)由t2至2T/3，第一吸附器减压至循环低压Pb的过程的最终步骤仅仅借助泵的作用完成；
f)由t3至t4，借助来自步骤b2)中另一吸附器的纯产物进行逆流再压缩；
d)由2T/3至t3，借助来自另一吸附器的纯产物于减压阶段初始时刻进行洗提/再压缩，同时通过上述泵进行排液(步骤b1)；
e)由t4至T，借助由产出物中提取的纯产物再压缩至循环高压(Ph)。
下表表明使用装填有5A、13X或CaX型沸石的三种吸附器的相同装置，实施高压Ph＝1.1×105帕(绝对压力)、低压Pb＝0.31×105帕(绝对压力)的循环所获得的对比结果。全部循环用时3×30秒，A对应于本发明开始部分定义的循环，B对应于本发明的循环，产率用比值表示：氧气生成量/氧气消耗量。氧含量％ 产率％88 A：50
B：5292 A：47
B：5194.8 A：37
B：45
根据本发明的一个方面，生产与抽吸减压步骤的确定须保证一方面混合气体的压缩装置和另一方面泵压装置能够连续地运行。因此，在给出的实施例中，对于具有n个吸附器和其循环历时T的装置，步骤b2)、c)和d)的期间与步骤a)的期间为K×T/h，k为大于或等于1的整数。
虽然本发明借助具体实施方式得到描述，但是并未因此而受到限制，与此相反，它可以是任何对本领域专业人员显而易见的改进与变通方式。
Claims (8)
1.在含有3个吸附器且每个吸附器中进行步骤如下循环的吸附装置中通过吸附由气体混合物生产不易被吸附气体的方法：
a)在循环高压(Ph)以基本上等压的方式生产上述气体，
b1)并流减压直至中压为止；
c)逆流最后减压直至循环低压(Pb)为止；
d)通过逆流通入来自阶段b1中另一吸附器的气体进行洗脱；和
e)独立地借助产出气体逆流再压缩直至循环高压(Ph)为止，其特征在于初始减压步骤b)包含一个处于阶段c)之前以逆流方式完成减压过程的第二阶段b2)，洗脱步骤d)之后，借助来自阶段b2)中另一吸附器的气体进行逆流再压缩的步骤f)。
2.按照权利要求1的方法，其特征在于循环低压Pb低于大气压。
3.按照权利要求2的方法，其特征在于低压(Pb)低于0.5×105帕(绝对压力)。
4.按照上述权利要求之一的方法，其特征在于步骤b2)、c)和d)中的逆流减压过程通过泵完成。
5.按照权利要求2—4中任一项的方法，其特征在于循环高压(Ph)略高于大气压。
6.按照权利要求1—5中任一项的方法，在含有n个吸收器的吸收装置中，其特征在于步骤b2)、c)和d)的期间为k×T/h，T为期间总长，k为等于或大于1的整数。
7.按照权利要求6的方法，其特征在于步骤a)的期间为k×T/h。
8.按照上述权利要求中任一项的方法，其特征在于气体为氧气，气体混合物为空气。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9403782A FR2718056B1 (fr) | 1994-03-30 | 1994-03-30 | Procédé de production d'un gaz par adsorption. |
| FR94/03782 | 1994-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1125910A true CN1125910A (zh) | 1996-07-03 |
Family
ID=9461602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95190243.1A Pending CN1125910A (zh) | 1994-03-30 | 1995-03-29 | 通过吸附生产气体的方法 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5549733A (zh) |
| EP (1) | EP0701470B1 (zh) |
| JP (1) | JPH08511726A (zh) |
| CN (1) | CN1125910A (zh) |
| CA (1) | CA2163988A1 (zh) |
| DE (1) | DE69507227T2 (zh) |
| FR (1) | FR2718056B1 (zh) |
| WO (1) | WO1995026805A1 (zh) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3309197B2 (ja) * | 1995-03-02 | 2002-07-29 | 住友精化株式会社 | 濃縮酸素の回収方法 |
| US5656067A (en) * | 1996-02-23 | 1997-08-12 | Air Products And Chemicals, Inc. | VSA adsorption process with energy recovery |
| US5656068A (en) * | 1996-02-29 | 1997-08-12 | Praxair Technology, Inc. | Large capacity vacuum pressure swing adsorption process and system |
| US6143056A (en) * | 1998-11-19 | 2000-11-07 | Praxair Technology, Inc. | Rotary valve for two bed vacuum pressure swing absorption system |
| US6253778B1 (en) | 1998-11-19 | 2001-07-03 | Praxair Technology, Inc. | Rotary valve |
| FR2806321B1 (fr) * | 2000-03-16 | 2002-10-11 | Air Liquide | Procede et reacteur de traitement d'un gaz au moyen d'un garnissage actif regenerable |
| US6524370B2 (en) * | 2000-07-28 | 2003-02-25 | The Boc Group, Inc. | Oxygen production |
| JP2004066125A (ja) * | 2002-08-07 | 2004-03-04 | Sumitomo Seika Chem Co Ltd | 目的ガスの分離方法 |
| CA2990793C (en) * | 2011-03-01 | 2019-04-09 | Exxonmobil Upstream Research Company | Methods of removing contaminants from a hydrocarbon stream by swing adsorption and related apparatus and systems |
| CN103713079B (zh) * | 2013-12-30 | 2016-02-10 | 力合科技（湖南）股份有限公司 | 一种水中SVOCs在线分析方法及仪器 |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL297067A (zh) * | 1962-09-04 | 1900-01-01 | ||
| US3430418A (en) * | 1967-08-09 | 1969-03-04 | Union Carbide Corp | Selective adsorption process |
| US3564816A (en) * | 1968-12-30 | 1971-02-23 | Union Carbide Corp | Selective adsorption process |
| US3636679A (en) * | 1971-01-04 | 1972-01-25 | Union Carbide Corp | Selective adsorption gas separation process |
| US4077780A (en) * | 1976-10-20 | 1978-03-07 | Union Carbide Corporation | Recovery of hydrogen and nitrogen from ammonia plant purge gas |
| DE3346032A1 (de) * | 1983-12-20 | 1985-06-20 | Linde Ag, 6200 Wiesbaden | Druckwechseladsorptionsverfahren |
| US4650501A (en) * | 1984-10-05 | 1987-03-17 | Union Carbide Corporation | Pressure swing adsorption process |
| FR2584307B1 (fr) * | 1985-07-08 | 1989-10-20 | Air Liquide | Procede de traitement d'un melange gazeux par adsorption |
| FR2599274B1 (fr) * | 1986-06-02 | 1988-08-26 | Air Liquide | Procede et installation de separation d'un melange gazeux par adsorption. |
| FR2633847B1 (fr) * | 1988-07-08 | 1991-04-19 | Air Liquide | Procede de traitement d'un melange gazeux par adsorption |
| DE3829584A1 (de) * | 1988-09-01 | 1990-03-08 | Bayer Ag | Trennung von gasgemischen durch vakuum swing adsorption in einem zwei-adsorber-system |
| US5203888A (en) * | 1990-11-23 | 1993-04-20 | Uop | Pressure swing adsorption process with multiple desorption steps |
| FR2672818B1 (fr) * | 1991-02-20 | 1993-04-23 | Air Liquide | Procede de production d'oxygene par adsorption. |
| JP2981302B2 (ja) * | 1991-05-13 | 1999-11-22 | 東洋エンジニアリング株式会社 | ガスの分離方法 |
| FR2682611B1 (fr) * | 1991-10-17 | 1993-12-03 | Air Liquide | Procede et installation d'epuration d'un gaz par adsorption. |
| FR2684023B1 (fr) * | 1991-11-26 | 1994-01-14 | Air Liquide | Procede de production d'un gaz a teneur substantielle en oxygene. |
| US5330561A (en) * | 1992-11-16 | 1994-07-19 | Air Products And Chemicals, Inc. | Extended vacuum swing adsorption process |
| US5294247A (en) * | 1993-02-26 | 1994-03-15 | Air Products And Chemicals, Inc. | Adsorption process to recover hydrogen from low pressure feeds |
| US5429666A (en) * | 1994-02-03 | 1995-07-04 | Air Products And Chemicals, Inc. | VSA adsorption process with continuous operation |
| US5411578A (en) * | 1994-05-10 | 1995-05-02 | Air Products And Chemicals, Inc. | Vacuum swing adsorption process with mixed repressurization and provide product depressurization |
-
1994
- 1994-03-30 FR FR9403782A patent/FR2718056B1/fr not_active Expired - Fee Related
-
1995
- 1995-03-24 US US08/410,310 patent/US5549733A/en not_active Expired - Fee Related
- 1995-03-29 CA CA002163988A patent/CA2163988A1/fr not_active Abandoned
- 1995-03-29 CN CN95190243.1A patent/CN1125910A/zh active Pending
- 1995-03-29 JP JP7525450A patent/JPH08511726A/ja active Pending
- 1995-03-29 DE DE69507227T patent/DE69507227T2/de not_active Expired - Fee Related
- 1995-03-29 WO PCT/FR1995/000396 patent/WO1995026805A1/fr active IP Right Grant
- 1995-03-29 EP EP95915221A patent/EP0701470B1/fr not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2718056A1 (fr) | 1995-10-06 |
| EP0701470A1 (fr) | 1996-03-20 |
| JPH08511726A (ja) | 1996-12-10 |
| WO1995026805A1 (fr) | 1995-10-12 |
| EP0701470B1 (fr) | 1999-01-13 |
| FR2718056B1 (fr) | 1996-05-03 |
| DE69507227T2 (de) | 1999-07-01 |
| CA2163988A1 (fr) | 1995-10-12 |
| US5549733A (en) | 1996-08-27 |
| DE69507227D1 (de) | 1999-02-25 |
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| EP0743874B1 (en) | Serial flow pressure swing adsorption process for gas separation |
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