CN103148675A - Twin towers used for a low temperature air separation plant - Google Patents

Twin towers used for a low temperature air separation plant Download PDF

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Publication number
CN103148675A
CN103148675A CN2012105084856A CN201210508485A CN103148675A CN 103148675 A CN103148675 A CN 103148675A CN 2012105084856 A CN2012105084856 A CN 2012105084856A CN 201210508485 A CN201210508485 A CN 201210508485A CN 103148675 A CN103148675 A CN 103148675A
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CN
China
Prior art keywords
tower
pressure column
lower pressure
container bottom
upper container
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
CN2012105084856A
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Chinese (zh)
Inventor
S·舒贝克
J·格佩尔
K·坎茨勒
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.)
Linde GmbH
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Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of CN103148675A publication Critical patent/CN103148675A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
    • 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
    • F25J3/04763—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
    • 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/20—Particular dimensions; Small scale or microdevices

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The invention relates to twin towers comprising a high pressure tower (1) and a low pressure tower (2) and used for a low temperature air separation plant. The low pressure tower (2) is disposed above the high pressure tower (1). The high pressure tower (1) and the low pressure tower (2) have containers which are formed by cylindrical walls (10, 20) and upper container bottom surfaces and lower container bottom surfaces (21, 11, 12). The upper container bottom surface (21, 121) of the low pressure tower (2) arches downward.

Description

The double tower that is used for cryogenic air separation plant
Technical field
The present invention relates to a kind of double tower.
Background technology
Disquisition " cryogenic technique " (second edition at Hausen/Linde, 1985) and Latimer at article (the 63rd volume of Chemical Engineering Progress, the second phase, 1967, the 35th page) in the basis of low temperature air separating has been described synoptically, and the structure of cryogenic air separation plant and double tower has been described especially.In at the bottom of the tower of the lower pressure column of double tower, condenser-reboiler is set usually, so-called main condenser, high-pressure tower and lower pressure column carry out heat exchange via this main condenser.
At this, the explanation on the space, for example top/following and top/below, be the location according to equipment run duration double tower.
The material crosspoint is positioned at the inside of high-pressure tower and lower pressure column, and it carries out strong material exchange and heat exchange between the liquid of the steam that rises and decline, and carries out feed separation by distillation thus.It can be by traditional rectifier bottom surface (for example sieving at the end), by filler or by orderly packing material or can also form by different types of material crosspoint is made up.
Advantageously, at prefabricated this type of double tower of workshop, usually even has most insulation crust (Coldbox: cryogenic box), then will this prefabricated double tower do as a whole laying flat on one's back and be transported to the job site, and erect at this.Optionally, the parts of prefabricated double tower discretely, for example high-pressure tower and lower pressure column, be transported to the job site respectively, and assemble at this.
Transportation clearance is restricted at this, especially the length of the parcel of transportation, the i.e. height of double tower.Someone has proposed different suggestions to reduce the height of double tower.At present also be confined to the measure of the inside of tower at this.For example someone advises, uses special material crosspoint, for example exceptionally close packing material (WO 93/19336A1=US 5,613,374).
Summary of the invention
The object of the invention is to, the double tower of a kind of aforementioned type of design can be realized the building height of less and Capacitance reserve is constant by the favourable measure of cost.
This purpose is to overarch downwards by the upper container bottom surface that makes lower pressure column to realize.
Container bottoms normally outwards overarches, because can compensate better the pressure from inside thus.In addition, in the situation that the diameter maximum is about the knockout tower of 3000mm, use dull and stereotyped as container bottoms.The upper container bottom surface overarches downwards, and at first this look like counterintuitive.But verified in category of the present invention, this measure is not only very feasible, realizes stability with rational extra charge, and has reduced generally the cost of investment of making cryogenic air separation plant, especially on the problem of observing the transportation lengths that allows.For example can be in the situation that observe the knockout tower that predetermined transportation clearance realizes extra high capacity by measure according to the present invention.The present invention preferably in the situation that the tower diameter use greater than 3000mm.
Irrelevant with transportation lengths, also realized advantage on economical with materials and technology by reduce building height in category of the present invention.When for example overarching downwards in the upper container bottom surface of high-pressure tower, the liquid of transferring to lower pressure column from high-pressure tower only need overcome smaller difference in height.
Particularly advantageously be that the upper container bottom surface of high-pressure tower and lower pressure column all overarches downwards.Saved thus building height the largelyst.In many cases, among two upper container bottom surfaces one overarch downwards and another upwards to overarch be also favourable.
If the upper container bottom surface of high-pressure tower overarches downwards, this bottom surface can form the lower container bottoms of lower pressure column simultaneously.Many especially materials have been saved thus.
Can use in principle traditional bottom surface form according to the present invention, for example compound curve bottom surface (Korbbogenboden).But in a particularly preferred embodiment of the present invention, the upper container bottom surface of lower pressure column or high-pressure tower forms by spherical disk (Kugelscheibe)." spherical disk " should be understood to have the workpiece of the shape of the circular portion of cutting from sphere at this.
The radius of curvature of spherical disk is on the order of magnitude of tower diameter (being the overall diameter of cylindrical wall of the correspondence of high-pressure tower or lower pressure column), and is especially smaller.Radius of curvature and tower diameter ratio are preferably between 0.6 and 1.2, between 0.8 and 1.0.
Have some two-column plant, wherein lower pressure column has the evaporator overhead condenser of the upper bottom surface top that is set directly at lower pressure column.But the present invention is preferably applied to double tower, wherein above the upper container bottom surface of lower pressure column, miscellaneous part is not set, and evaporator overhead condenser especially is not set.
The below sets forth the present invention and other details of the present invention in more detail by two illustrated in the drawings embodiment, and they have shown the vertical section of double tower, does not wherein show inner tower part, as material crosspoint and distributor, and main condenser.
Description of drawings
Figure 1 shows that the first embodiment that has as the compound curve bottom surface of the upper bottom surface of lower pressure column, and
Figure 2 shows that the second embodiment that has as the spherical disk of the upper bottom surface of lower pressure column.
The specific embodiment
Figure 1 shows that a kind of double tower, it forms by high-pressure tower 1 and lower pressure column 2.(do not press in the drawings overall length and show high-pressure tower and lower pressure column).They have container, and container forms by cylindrical wall 10/20, upper container bottom surface 11/21 and lower container bottoms 12/11 separately.The upper container bottom surface 11 of high-pressure tower forms the lower container bottoms of lower pressure column at the same time.
Two containers are 3400mm perpendicular to the diameter of cylinder axis 3.The thickness of cylindrical wall 10 is 30mm, and the thickness of cylindrical wall 20 is 16mm.The thickness of wall or container bottoms depends on diameter, pressure and the governor motion used of container.
In an embodiment different from diagram, the diameter of the container of high-pressure tower and lower pressure column can be different.For example the diameter of lower pressure column can be than the diameter of high-pressure tower large 5 to 15%.In the case, spherical disk 11 directly above use the middleware of circular cone annular as the transition between different-diameter.
The lower container bottoms 12 of high-pressure tower designs in a conventional manner, the compound curve bottom surface that namely outwards overarches.Different therewith, the upper container bottom surface 21 of lower pressure column according to the present invention downwards (namely inwardly) overarch.It is by compound curve bottom surface formation.
The upper container bottom surface 11 of high-pressure tower overarches equally downwards.Its spherical disk that is especially 2786mm by radius of curvature forms.Alternatively, the upper container bottom surface 11 of high-pressure tower also can be used as the spherical disk that upwards overarches, the compound curve bottom surface that upwards overarches or the form of the compound curve bottom surface that overarches forms downwards.
Cylindrical wall 10 and spherical disk 11 interconnect by transition rings 13.Between cylindrical wall 10 and transition rings 13 be connected and transition rings 13 and spherical disk 11 between be connected that the mode that is to connect with welding realizes.
The difference of structure shown in Fig. 2 and Fig. 1 is, utilizes transition rings 113 that the upper container bottom surface of lower pressure column is connected with the spherical disk 121 that overarches downwards, is similar to the element 11 and 13 shown in Fig. 1.

Claims (6)

1. be used for the double tower with high-pressure tower (1) and lower pressure column (2) of cryogenic air separation plant, wherein lower pressure column (2) is arranged on above high-pressure tower (1), high-pressure tower (1) and lower pressure column (2) have container separately, these containers are all by cylindrical wall (10,20) and upper container bottom surface and lower container bottoms (21,11,12) form, it is characterized in that, the upper container bottom surface (21,121) of lower pressure column overarches downwards.
2. according to claim 1 double tower, is characterized in that, the upper container bottom surface of high-pressure tower and lower pressure column all overarches downwards.
3. according to claim 1 and 2 double tower, is characterized in that, the upper container bottom surface (11) of high-pressure tower (1) overarches downwards, forms simultaneously the lower container bottoms of lower pressure column (2).
4. the double tower of one of according to claim 1 to 3, is characterized in that, the upper container bottom surface (121) of lower pressure column forms by spherical disk.
5. the double tower of one of according to claim 1 to 4, is characterized in that, the upper container bottom surface (11) of high-pressure tower (1) forms by spherical disk.
6. the double tower of one of according to claim 1 to 5, is characterized in that, in the top, upper container bottom surface (21) of lower pressure column, evaporator overhead condenser is not set.
CN2012105084856A 2011-10-20 2012-10-19 Twin towers used for a low temperature air separation plant Pending CN103148675A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110116498 DE102011116498A1 (en) 2011-10-20 2011-10-20 Double column for a cryogenic air separation plant
DE102011116498.0 2011-10-20

Publications (1)

Publication Number Publication Date
CN103148675A true CN103148675A (en) 2013-06-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111032175A (en) * 2017-08-25 2020-04-17 普莱克斯技术有限公司 Annular dividing wall column of air separation unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013009121U1 (en) 2013-10-15 2013-11-12 Linde Aktiengesellschaft crude argon

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0560462A (en) * 1991-02-05 1993-03-09 Air Prod And Chem Inc Method of separating supply gas in cryogenic distillation column
CN1286387A (en) * 1999-08-31 2001-03-07 普拉塞尔技术有限公司 Cryogenic rectifying system for producing very high purity oxygen
CN101105360A (en) * 2006-07-14 2008-01-16 乔治洛德方法研究和开发液化空气有限公司 System and apparatus for providing low pressure and low purity oxygen
CN201059774Y (en) * 2007-05-16 2008-05-14 张惠银 Anti-corrosive thermal storage type water tank
CN201909505U (en) * 2010-12-30 2011-07-27 液化空气(杭州)有限公司 Air separation plant capable of increasing oxygen pressure by means of self pressurization

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4224068A1 (en) 1992-03-20 1993-09-23 Linde Ag METHOD FOR DEEP TEMPERATURE DISASSEMBLY OF AIR AND AIR DISASSEMBLY SYSTEM

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0560462A (en) * 1991-02-05 1993-03-09 Air Prod And Chem Inc Method of separating supply gas in cryogenic distillation column
CN1286387A (en) * 1999-08-31 2001-03-07 普拉塞尔技术有限公司 Cryogenic rectifying system for producing very high purity oxygen
CN101105360A (en) * 2006-07-14 2008-01-16 乔治洛德方法研究和开发液化空气有限公司 System and apparatus for providing low pressure and low purity oxygen
CN201059774Y (en) * 2007-05-16 2008-05-14 张惠银 Anti-corrosive thermal storage type water tank
CN201909505U (en) * 2010-12-30 2011-07-27 液化空气(杭州)有限公司 Air separation plant capable of increasing oxygen pressure by means of self pressurization

Non-Patent Citations (1)

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Title
刘传宝、王秀英: "成型椭圆形封头全样板检查", 《石油化工设备》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111032175A (en) * 2017-08-25 2020-04-17 普莱克斯技术有限公司 Annular dividing wall column of air separation unit

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Application publication date: 20130612