CN110487025A - A kind of air-separating plant - Google Patents
A kind of air-separating plant Download PDFInfo
- Publication number
- CN110487025A CN110487025A CN201910784823.0A CN201910784823A CN110487025A CN 110487025 A CN110487025 A CN 110487025A CN 201910784823 A CN201910784823 A CN 201910784823A CN 110487025 A CN110487025 A CN 110487025A
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- China
- Prior art keywords
- tower
- diameter
- air
- cone
- rectifying column
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Classifications
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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
- F25J3/04763—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
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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
The invention discloses a kind of air-separating plants, including at least a rectifying column, the rectifying column includes the first tower body and the second tower body, first tower body is arranged on second tower body, and first tower body diameter less than the second tower body diameter, it is connected between first tower body and the second tower body by a conical head, has at least one aperture on the conical head.
Description
Technical field
The invention belongs to press device fields, and in particular to a kind of air-separating plant.
Background technique
End socket be from petrochemical industry, atomic energy, it is indispensable into all conglomerate pressure vessel and equipments such as food, pharmacy
Important component.End socket is the important spare part of constitution equipment, it and cylinder connect and constitute the shell of equipment, end socket and cylinder
The advantages of body can be welded directly, form non-removable type of attachment, this connection type is that link cost is low, sealing performance
It is good, it is not easy to generate the leakage accident in production process.
A component of the end socket as container can be divided into spherical, oval according to geometry and the difference in adaptation field
Shape, dish, spherical, conical shell and flat cover etc. are several, wherein spherical, dish, ball crown type end socket are referred to as convex end socket again, use
In various tankages, such as storage tank, heat exchanger, tower, reaction kettle, boiler and separation equipment.
The most commonly used is ellipsoidal heads for rectifying column in air-separating plant, because ellipsoidal head is suitable for standardization greatly
Scale manufacturing is easy to punch forming, and mechanical property is good.Double pressure air separation columns in air separation generally include under rectifying column
Tower on tower and rectifying column, the operating pressure of tower is generally 5~6.5Bar A under rectifying column, higher than the general operation of tower on rectifying column
1.1~1.5Bar of pressure A.Tower is vertically installed at the top of tower under rectifying column on rectifying column, and top of tower is provided under rectifying column
One condenser/evaporator.It is very general that double pressure air separation columns, which produce the products such as pure liquid oxygen, pure liquid nitrogen, middle pressure pure nitrogen gas and dirty nitrogen,
Time, the mutual ratio of various products is determined by the design of air separation column, will not generate very big change in operation
Change.
When needing Low Voltage Pure nitrogen product, it will usually increase a further essence on the basis of former double pressure air separation columns
The tower of low-pressure nitrogen product is evaporated, i.e., purity nitrogen tower is set on tower on rectifying column.Purity nitrogen tower has the cross-sectional area reduced, with essence
Evaporate tower on tower other parts be it is full communicating, do not separate.Pass through an ellipse envelope on rectifying column between tower and purity nitrogen tower
Head connection.
Low pressure pure nitrogen gas is usually generated by the top of purity nitrogen tower, and dirty nitrogen is usually by the top of tower on rectifying column close to purity nitrogen
It is generated at tower.Low pressure pure nitrogen gas and dirty nitrogen after subcooler heats up, are gone successively between main heat exchanger and the progress of each fluid respectively
Heat exchange is connect, subsequent low pressure pure nitrogen gas can be used as product storage or be delivered directly to client, and dirty nitrogen also can be used as product, or be used for
The regeneration of air cleaning adsorbent equipment, the pre-cooling of chilldown system, or be directly discharged into atmosphere.
The design of rectifying column determines the energy of air separation including tower height, diameter, wire feeding and packing tower plates number etc.
Power.According to the calculating of process parameter, for a certain amount of feeding air, the low pressure pure nitrogen gas and dirty nitrogen that generated by rectifying column this
The flow total amount of two fluids is substantially constant.Thus, for connecting the bore size of external pipe in rectifying on rectifying column
The design phase of tower just has determined that.It is 75000Nm with a set of oxygen-producing amount3For the air separation unit of/h, the production of dirty nitrogen
Amount is 170000Nm3The nominal diameter of/h, the external pipe of the tapping in the tower wall of the corresponding tower on rectifying column is
1200mm。
With the enlargement of air-separating plant, the yield of dirty nitrogen increases, and is correspondingly located at the tower wall of tower on rectifying column
On the nominal diameter of external pipe of dirty nitrogen tapping also increase with it.Sometimes it will appear because dirty nitrogen aperture is set
The case where counting and increasing the height of tower on rectifying column, at the same time, the practical filling material number of plates of purity nitrogen tower is because of tower on rectifying column
Height increases and is more than required theoretical packing tower plates number, and causing the whole Transporting height of rectifying column to increase, (tower is logical on rectifying column
It is often transported together with purity nitrogen tower).
Summary of the invention
The main object of the present invention be to provide one kind under the premise of not changing process parameter, by tower on rectifying column with it is pure
It is connected between nitrogen tower with a conical head, and dirty nitrogen aperture is moved to the conical head from rectifying column in the tower wall of tower
On mode, avoid the case where increasing tower height degree on rectifying column because of the design of dirty nitrogen aperture, while can reduce pure
The practical filling material number of plates of nitrogen tower, eliminates shortcomings and deficiencies in the prior art, while meeting experience in design and mechanics
Performance calculates.
In order to achieve the above-mentioned object of the invention, the invention discloses a kind of air-separating plants, include at least a rectifying column,
The rectifying column includes the first tower body and the second tower body, and first tower body is arranged on second tower body, and the first tower
Diameter of the diameter of body less than the second tower body, in which: connected between first tower body and the second tower body by a conical head, institute
Stating on conical head has at least one aperture.
Further, the conical head includes cone and lower straight flange, and the cone is by circle suitable for reading, lower mouth circle and taper
Side composition, diameter of a circle suitable for reading are less than lower mouth diameter of a circle.
Further, the lower mouth circle of the cone is connected with the upper end of lower straight flange, and lower straight flange is annular shape, and lower straight flange is high
The range of degree is 40mm~50mm.
Further, the aperture is located in the cone, a diameter of D1.
Further, there are two the apertures on the conical head, the aperture is arranged symmetrically in the cone,
Diameter is D2.
Further, in the cone with diameter be D1 an aperture, or with the diameter being arranged symmetrically be D2
Two apertures, in which:
Further, the extended line of the tapered edges of the cone and the angle α of central axes are 30 ° or 45 °.
Further, the rectifying column includes at least tower under rectifying column, tower and purity nitrogen tower on rectifying column.
Further, first tower body is purity nitrogen tower, and second tower body is tower on rectifying column.
Further, the circle suitable for reading of the cone is connect with the outer wall of first tower body by welding manner.
Further, the diameter of the lower straight flange of the cone is identical as the diameter of second tower body.
Further, the lower end of the lower straight flange of the cone and the upper end of second tower body are connected by welding manner
It connects.
Compared with prior art, the technical scheme provided by the invention has the following advantages:
1. avoiding the case where increasing tower height degree on rectifying column because of the design of dirty nitrogen aperture, reduce whole Transporting
Highly.
2. can reduce the practical filling material number of plates of purity nitrogen tower simultaneously, avoiding under the premise of not changing process parameter need not
The waste wanted.
Detailed description of the invention
It can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Fig. 1 is the structural schematic diagram of the prior art；
Fig. 2 is the structural schematic diagram of conical head；
Fig. 3 is the structural schematic diagram of the first embodiment of air-separating plant provided by the present invention；
Fig. 4 is the structural schematic diagram of the second embodiment of air-separating plant provided by the present invention.
Specific embodiment
The specific embodiment that the invention will now be described in detail with reference to the accompanying drawings.However, the present invention should be understood as to not office
It is limited to this embodiment described below, and technical concept of the invention can be with other well-known techniques or function and those
The identical other technologies combination of well-known technique is implemented.
In the explanation of following specific embodiments, it is to be understood that term " height ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as " vertical ", "horizontal", "top", "bottom", "inner", "outside" be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not understood to limitation of the present invention.
Unless otherwise instructed, the herein presented qualifier similar to " first ", " second " is not meant that suitable to the time
The restriction of sequence, quantity or importance, and be used for the purpose of the technical characteristic and another technology in the technical program
Feature is mutually distinguished.Similarly, the herein presented qualifier similar to " one " does not mean that the restriction to quantity, but describes
The technical characteristic not occurred above.Similarly, what is occurred before number herein is similar to " about ", " approximatively "
Modifier generally comprises this number, and its specific meaning should understand in conjunction with context meaning.
In the present invention unless specifically defined or limited otherwise, the terms such as term " installation ", " connected ", " connection " are answered
It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection；It can
It to be to be connected directly, can also be indirectly connected with by intermediary, can be connection inside two elements or two elements
Interaction relationship.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
First tower body of the present invention is purity nitrogen tower, and second tower body is tower on rectifying column.The purity nitrogen tower setting exists
On the rectifying column on tower, and the diameter of purity nitrogen tower is less than the diameter of tower on rectifying column, tower on the purity nitrogen tower and rectifying column
Between connected by a conical head, have at least one aperture on the conical head.
It is 150K or lower than the rectificating method carried out under 150K that term " rectifying ", which is referred at least partially in temperature,.Herein
" tower " means that wherein liquid and gas counter current contacting is to efficiently separate fluid mixture with rectifying or fractionating column or area.
Term " dirty nitrogen " covers gaseous fluid and the gaseous fluid of the nitrogen content not less than 95 molar percentages
Pressure is lower than 1.5Bar A, and the content of nitrogen is less than " low pressure pure nitrogen gas " in " dirty nitrogen ".
" diameter " all refers to nominal diameter, also known as mean outside diameter, refers to the standardized diameter system of container, pipeline and its attachment
Column.It is advantageously implemented the standardization of components using nominal diameter, is also convenient to design, manufacture, repair and management, reduces manufacture
Cost.For container, nominal diameter is indicated with internal diameter；For pipeline, then with less than outer diameter and greater than some size table of internal diameter
Show.Corresponding to a certain nominal diameter of pipeline, outer diameter is certain value, and internal diameter changes with wall thickness.
" conical head " is also referred to as conical shell herein, is a kind of stamped cold/hot shaped, the end socket of outer image cone.Cone
Shape end socket includes cone and lower straight flange, and the cone is made of circle suitable for reading, lower mouth circle and tapered edges, under diameter of a circle suitable for reading is less than
Mouth diameter of a circle, the extended line of tapered edges and the angle of central axes are α, i.e., the cone angle of cone is 2 α.The lower mouth circle of the cone
It is connected with the upper end of lower straight flange, lower straight flange is annular shape, and the range of lower straight side length is 40mm~50mm.Conical head is usually used in
In various pressure vessels and pressure pipeline, it is also commonly used for the connection transition for the cylinder that two sections of diameters do not wait.
Fig. 1 is the structural schematic diagram of the prior art.As shown in Figure 1, purity nitrogen tower 1 be vertically installed on rectifying column tower 2 it
On, purity nitrogen tower 1 have reduce cross-sectional area, the other parts with tower 2 on rectifying column be it is full communicating, do not separate.Essence
It evaporates and is connected between tower 2 and purity nitrogen tower 1 by an ellipsoidal head 3 on tower.With 75000Nm in the prior art3The space division of/h fills
It is set to example, the diameter of purity nitrogen tower 1 is 2700mm, and the diameter of tower 2 is 4600mm on rectifying column, and the yield of dirty nitrogen is
170000Nm3/ h, the diameter D of the corresponding dirty nitrogen outlet 4 on rectifying column in the tower wall of tower 2 are 1200mm.On rectifying column
On the basis of the top distributor 5 of tower 2, shipping height of the rectifying column from benchmark to tower top is H1, i.e., tower 2 is most from rectifying column
Top dispenser 5 arrives the outlet of low pressure pure nitrogen gas, about 5262mm.In the prior art, the practical filling material number of plates of purity nitrogen tower 1 because
The height of tower increases and is more than required theoretical packing tower plates number on rectifying column.
The 2-4 specific embodiment that the present invention will be described in detail with reference to the accompanying drawing.
As shown in Fig. 2, conical head includes cone 6 and lower straight flange 7, cone 6 is in pyramidal, and the cone 6 is by circle suitable for reading
8, lower mouth circle 9 and tapered edges 10 form, and the diameter of circle 8 suitable for reading is less than the diameter of lower mouth circle 9, the extended line and axis of tapered edges 10
The angle of line is α.The lower mouth circle 9 of the cone is connected with the upper end of lower straight flange 7, and lower straight flange 7 is annular shape.The lower straight flange of cone
7 diameter is identical as the diameter of tower 2 on the rectifying column, and on the lower end of the lower straight flange 7 of cone and rectifying column tower 2 upper end
It is connected by welding manner.
Fig. 3 is the structural schematic diagram of the first embodiment of air-separating plant provided by the present invention.Do not changing process
Under the premise of parameter, on rectifying column between tower 2 and purity nitrogen tower 1 by a conical head 11 connect, the conical head 11 it is upper
Mouthful circle is connect with the outer wall of the purity nitrogen tower 1 by welding manner, and by the tower wall of dirty nitrogen outlet 4 ' tower from rectifying column
On be moved on the conical head 11.The extended line of tapered edges and the angle of central axes are 30 ° in this embodiment, i.e. the cone of cone
Angle is 60 °, is about 1900mm according to the taper edge lengths for calculating conical head 11, and opening a diameter D1 is 1200mm's
Hole is reasonable, and meets mechanical property calculating.On the basis of the top distributor 5 of tower 2 on rectifying column (this distributor with
Under the design of rectifying column do not change), shipping height of the rectifying column from benchmark to tower top is H2, about 4641mm.This
In embodiment, the practical filling material number of plates of purity nitrogen tower 1 is still more than required theoretical packing tower plates number.
In order to be further reduced the whole Transporting height of rectifying column, Fig. 4 is air-separating plant provided by the present invention
The structural schematic diagram of second embodiment.The extended line of tapered edges and the angle of central axes are 45 ° in this embodiment, i.e. the cone of cone
Angle is 90 °, is about 1360mm according to the taper edge lengths for calculating conical head 12, is if opening a diameter D1
The hole of 1200mm will not be able to calculate by mechanical property.Engineering staff proposes by being arranged symmetrically two on the conical head
A diameter is the aperture 4 " of D2, is calculated according to process parameterDiameter D2 is about 850mm.At this point, with essence
Evaporate (design of this distributor rectifying column below does not change) on the basis of the top distributor 5 of tower 2 on tower, rectifying column from
The shipping height of benchmark to tower top is H3, about 4013mm.
It follows that air separation unit provided by the present invention greatly reduces the whole Transporting height of rectifying column, while can
To reduce the practical filling material number of plates of purity nitrogen tower, unnecessary waste is avoided under the premise of not changing process parameter.
It is preferred embodiment of the invention described in this specification, above embodiments are only to illustrate the present invention
Technical solution rather than limitation of the present invention.All those skilled in the art pass through logic analysis, reasoning under this invention's idea
Or the limited available technical solution of experiment, it all should be within the scope of the present invention.
Claims (12)
1. a kind of air-separating plant, includes at least a rectifying column, the rectifying column includes the first tower body and the second tower body, institute
It states the first tower body to be arranged on second tower body, and the diameter of the first tower body, less than the diameter of the second tower body, feature exists
In: it is connected between first tower body and the second tower body by a conical head, has at least one aperture on the conical head.
2. air-separating plant according to claim 1, it is characterised in that: the conical head includes cone and lower straight
Side, the cone are made of circle suitable for reading, lower mouth circle and tapered edges, and diameter of a circle suitable for reading is less than lower mouth diameter of a circle.
3. air-separating plant according to claim 2, it is characterised in that: the lower mouth of the cone is round upper with lower straight flange
End is connected, and lower straight flange is annular shape, and the range of lower straight side length is 40mm~50mm.
4. air-separating plant according to claim 2, it is characterised in that: the aperture is located in the cone, straight
Diameter is D1.
5. air-separating plant according to claim 2, it is characterised in that: there are two the apertures on the conical head,
The aperture is arranged symmetrically in the cone, and diameter is D2.
6. air-separating plant according to claim 2, an aperture for being D1 with diameter in the cone, or have
The diameter being arranged symmetrically is two apertures of D2, it is characterised in that:
7. air-separating plant according to claim 2, it is characterised in that: the extended line of the tapered edges of the cone is in
The angle α of axis is 30 ° or 45 °.
8. air-separating plant according to claim 1, it is characterised in that: the rectifying column includes at least under rectifying column
Tower and purity nitrogen tower on tower, rectifying column.
9. air-separating plant according to claim 8, it is characterised in that: first tower body is purity nitrogen tower, described
Two tower bodies are towers on rectifying column.
10. air-separating plant according to claim 2, it is characterised in that: the circle suitable for reading of the cone and described first
The outer wall of tower body is connected by welding manner.
11. air-separating plant according to claim 2, it is characterised in that: the diameter of the lower straight flange of the cone and institute
The diameter for stating the second tower body is identical.
12. air-separating plant according to claim 11, it is characterised in that: the lower end of the lower straight flange of the cone and institute
The upper end for stating the second tower body is connected by welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910784823.0A CN110487025A (en) | 2019-08-23 | 2019-08-23 | A kind of air-separating plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910784823.0A CN110487025A (en) | 2019-08-23 | 2019-08-23 | A kind of air-separating plant |
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| Publication Number | Publication Date |
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| CN110487025A true CN110487025A (en) | 2019-11-22 |
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ID=68553335
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910784823.0A Pending CN110487025A (en) | 2019-08-23 | 2019-08-23 | A kind of air-separating plant |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007192466A (en) * | 2006-01-19 | 2007-08-02 | Nippon Steel Corp | Cryogenic air separation plant and its control method |
| CN101886871A (en) * | 2010-08-04 | 2010-11-17 | 四川空分设备(集团)有限责任公司 | Method and device for producing pressure oxygen by air separation |
| CN202125594U (en) * | 2011-05-25 | 2012-01-25 | 宜兴市联丰化工机械有限公司 | Conical head |
| CN102425917A (en) * | 2011-08-30 | 2012-04-25 | 杭州杭氧股份有限公司 | Multifunctional rectifying tower |
| CN102797846A (en) * | 2011-05-25 | 2012-11-28 | 宜兴市联丰化工机械有限公司 | Conical head |
| WO2014130066A1 (en) * | 2013-02-21 | 2014-08-28 | Gtc Technology Us Llc | Separation processes using divided columns |
-
2019
- 2019-08-23 CN CN201910784823.0A patent/CN110487025A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007192466A (en) * | 2006-01-19 | 2007-08-02 | Nippon Steel Corp | Cryogenic air separation plant and its control method |
| CN101886871A (en) * | 2010-08-04 | 2010-11-17 | 四川空分设备(集团)有限责任公司 | Method and device for producing pressure oxygen by air separation |
| CN202125594U (en) * | 2011-05-25 | 2012-01-25 | 宜兴市联丰化工机械有限公司 | Conical head |
| CN102797846A (en) * | 2011-05-25 | 2012-11-28 | 宜兴市联丰化工机械有限公司 | Conical head |
| CN102425917A (en) * | 2011-08-30 | 2012-04-25 | 杭州杭氧股份有限公司 | Multifunctional rectifying tower |
| WO2014130066A1 (en) * | 2013-02-21 | 2014-08-28 | Gtc Technology Us Llc | Separation processes using divided columns |
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Application publication date: 20191122 |