CN209068856U - Full distillation mentions the oxygen-enriched air separation unit of argon - Google Patents
Full distillation mentions the oxygen-enriched air separation unit of argon Download PDFInfo
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Abstract
Full distillation provided by the utility model mentions the oxygen-enriched air separation unit of argon, is related to air separation equipment field, including air pretreatment section, rectifying section and smart argon section；Rectifying section includes Xia Ta, upper tower, condenser/evaporator, main heat exchanger, supercharger/expanding machine, pressurization aftercooler, subcooler, the oxygen-enriched liquid air outlet of lower tower bottom is divided into two tunnels after connecting with the oxygen-enriched liquid air runner of subcooler, it connect with the oxygen-enriched liquid air import of upper tower, and is connect with crude argon condenser inlet；The liquid oxygen of upper tower bottom enters condenser/evaporator, and autocondensation evaporator outlet is divided into two tunnels, connects pure liquid oxygen product conveyance conduit as product liquid oxygen all the way, and another way and the oxygen-enriched liquid air outlet of liquid pump, lower tower bottom are sequentially connected；The argon fraction of upper tower lower part successively passes through the first crude argon column, the second crude argon column and pure argon column and obtains pure liquid argon；The utility model has the beneficial effects that oxygen-enriched air separation unit mentions argon, increases device product kind, increase economic efficiency.
Description
Technical field
The utility model relates to a kind of cryogenic air separation apparatus fields, and in particular to a kind of Full distillation proposes the oxygen-enriched space division of argon
Device.
Background technique
Air refers to the gas mixing in earth atmosphere, it is mainly by 78% nitrogen, 21% oxygen, 0.94%
Rare gas (helium, neon, argon, krypton, xenon), 0.03% carbon dioxide, 0.03% other substance (such as vapor, impurity) groups
At mixture, wherein rare gas is mainly argon ingredient.
Air separation plant is that air is raw material, and air is become liquid by the method for compression depth of round freezing, using
Rectifying and from liquid air gradually separate produce the inert gases such as oxygen, nitrogen and argon gas equipment.Air separation plant is one
The complication system of a large size mainly includes dynamical system, purification system, refrigeration system, heat-exchange system, distillation system, product
Transportation system, liquid storage system and control system etc..
Dynamical system is primarily referred to as air compressor, and air is obtained the products such as oxygen, nitrogen through cryogenic separation by air separation plant, from
It is essentially to be completed by energy conversion, and the energy of device is mainly inputted by air compressor；Purification system is by sky
Gas chilldown system and sieve purification system composition, compressed raw air temperature is higher, and air precooling system is by connecing
Touch heat exchange reduces the temperature of air, while can wash the objectionable impurities such as acidic materials therein, and sieve purification system is then
It further removes moisture, carbon dioxide, acetylene, propylene, propane and nitrous oxide in air etc. and nocuousness is run to air separation plant
Substance；The refrigeration system of air separation plant is realized by expanding machine, and the refrigeration of entire air separation plant follows strictly classical
Refrigeration cycle；The thermal balance of air separation plant is completed jointly by refrigeration system and heat-exchange system, is exchanged heat in the prior art
Device mainly uses aluminum plate-fin heat exchanger；The core of air separation plant is distillation system, realizes the cryogenic separation of composition of air, by
Lower pressure column, medium pressure column and condenser/evaporator composition；The oxygen and nitrogen of air separation plant production need certain pressure to be just able to satisfy
The use of follow-up system is completed by each road pipeline of product delivery system；The products such as the liquid oxygen and liquid nitrogen of air separation plant production,
Into liquid storage system；Existing large air separation plant is all made of computer distributed control system, realizes and automatically controls.
The major product of this equipment is liquid nitrogen, liquid oxygen and oxygen-enriched air, and oxygen-enriched air is mainly used in converter, glass furnace
Kiln, metal smelt etc. it is combustion-supporting.The general combustion-supporting pressure needed with oxygen-enriched air is in 0.1-0.2MPa.Conventional oxygen-enriched space division is set
Standby to use twin-stage rectifying, upper tower bottom directly obtains oxygen rich gas and is forced into required pressure through oxygen compressor again after master changes re-heat,
Or oxygen-enriched liquid air is obtained in upper tower bottom, to go out fractionating column cold for re-heat again after being pressurized to required pressure through compression in liquid oxygen pump or certainly
Case.
The refrigeration system of existing air separation plant due to needing the dew point of each gas to be achieved, and then consumes a large amount of electricity
Can, increase production cost；In addition, conventional oxygen-enriched air separation plant can produce byproduct purity nitrogen while obtaining oxygen rich air
Air-liquid nitrogen can not produce purity oxygen or pure liquid oxygen simultaneously, and it is even more impossible to produce argon gas or liquid argon simultaneously.
Utility model content
The utility model aim is to provide a kind of Full distillation and mentions the oxygen-enriched air separation unit of argon, and Full distillation can be effectively reduced and mention argon
The power consumption of oxygen-enriched air separation process, while the pure liquid nitrogen of byproduct and oxygen or liquid oxygen can also be produced simultaneously, and production liquid argon
Or argon gas.
To reach above-mentioned purpose, the utility model proposes following technical solutions: a kind of Full distillation mentions the oxygen-enriched air separation unit of argon,
Including air pretreatment section, the air pretreatment section be used to prepare dry purified air and be transmitted to rectifying section；
It further include rectifying section and proposing argon section, the rectifying section includes Xia Ta, upper tower, condenser/evaporator, main heat exchanger, pressurization
Aftercooler, supercharger, expanding machine and subcooler；The condenser/evaporator is arranged between Xia Ta and upper tower；It is described to propose argon section
Including the first crude argon column, the second crude argon column, pure argon column, technique liquid argon pump, crude argon condenser, smart argon evaporator and smart argon condensation
Device；
The dry purified air outlet of the air pretreatment section is divided into three tunnels, the first via and the first feeding air of main heat exchanger
Runner, lower tower bottom air intlet are sequentially connected, the second tunnel and supercharger air inlet, pressurization aftercooler air inlet, main heat exchange
Air intlet is sequentially connected in the middle part of the second feeding air of device runner, expander inlet and upper tower, third road and instrument air system
Air inlet of uniting connects；
Two tunnels of the nitrogen outlet of the lower top of tower point, the first via are connect with condenser/evaporator air inlet；Second Lu Yujing
The smart argon evaporator air inlet of argon column lower part connects；
The oxygen-enriched liquid air outlet of the lower tower bottom is divided into two tunnels, the first via after connecting with the oxygen-enriched liquid air runner of subcooler
It is connect with the oxygen-enriched liquid air import on upper tower top, the second tunnel is connect with crude argon condenser inlet；
The condenser/evaporator liquid nitrogen runner exit is divided into two tunnels, and the first via is connect with the liquid nitrogen reflux mouth of lower top of tower,
The connection of the liquid nitrogen runner of second tunnel and subcooler；
The liquid nitrogen runner exit of the subcooler is divided into three tunnels, and the first via is connect with upper top of tower liquid nitrogen reflux mouth, and second
Road connects pure liquid nitrogen product conveyance conduit, third Lu Yujing argon condenser liquid nitrogen import connection as nitrogen products；
The upper tower bottom is connect with condenser/evaporator, and the liquid oxygen of upper tower bottom enters condenser/evaporator, liquid oxygen autocondensation
Evaporator outlet is divided into two tunnels, and the first via connects pure liquid oxygen product conveyance conduit as product liquid oxygen, the second tunnel and liquid pump, under
The oxygen-enriched liquid air outlet of tower bottom is sequentially connected, and the liquid after converging is connect with main heat exchanger liquid oxygen evaporation runner；
The dirty nitrogen on the upper tower top is connect with the dirty nitrogen runner of subcooler, main heat exchanger；
The purity nitrogen of the upper top of tower and the purity nitrogen of subcooler, main heat exchanger connect runner and connect；
The argon fraction outlet of the upper tower lower part and thick gas at the top of the first crude argon tower bottom argon fraction import, the first crude argon column
Argon outlet and the thick gas argon import of the second crude argon tower bottom are sequentially connected；
Process argon outlet at the top of second crude argon column is divided into two tunnels, the first via and the import of crude argon condenser process argon and
Second crude argon column crude argon refluxing opening is sequentially connected, and the second tunnel is connect with the process argon import in the middle part of pure argon column；
The pure liquid argon outlet of the pure argon column bottom connects pure liquid argon product conveyance conduit；
The essence argon condenser gas nitrogen and the outlet of upper tower top dirt nitrogen converge to be connected with the dirty nitrogen runner of subcooler, main heat exchanger
It connects；
The crude liquid argon outlet of the second crude argon tower bottom is connect with technique liquid argon pump inlet, thick with the first crude argon column top
Liquid argon import connection flows back with the argon fraction of upper tower lower part and connects.
Further, the rectifying section includes liquid nitrogen producing line；The liquid nitrogen producing line goes out from air pretreatment section dry air
Mouth is through the first feeding air of main heat exchanger runner, lower tower bottom air intlet, lower top of tower nitrogen outlet, condenser/evaporator nitrogen
Import to condenser/evaporator liquid nitrogen exports；
The liquid nitrogen outlet of the liquid nitrogen producing line is divided into four tunnels, the liquid nitrogen runner of the first via and subcooler, upper tower liquid nitrogen into
Mouth is sequentially connected, and the second tunnel is connect with the smart argon condenser inlet on pure argon column top, and third road and lower tower liquid nitrogen reflux mouth connect
It connects, the 4th tunnel connects liquid nitrogen product output pipe.
Further, the rectifying section includes gas nitrogen producing line；The gas nitrogen producing line goes out from air pretreatment section dry air
The mouth first via is pushed up through liquid air import, upper tower 6 in the middle part of the first feeding air of main heat exchanger runner, lower tower bottom air intlet, upper tower
The supreme top of tower nitrogen outlet of portion's liquid nitrogen import；Second tunnel is through supercharger air inlet, pressurization aftercooler air inlet, main heat exchanger
Second feeding air runner, expander inlet, the upper tower middle part supreme top of tower nitrogen outlet of air intlet；The gas nitrogen producing line
Nitrogen outlet be directly connected to nitrogen product output channel, as output of products.
Further, first crude argon column and the second crude argon column are coupled using technique liquid argon pump.
From the above technical scheme, the technical solution of the utility model provides a kind of Full distillation and mentions the oxygen-enriched space division dress of argon
Set, obtain it is following the utility model has the advantages that
1) the utility model arrives liquid oxygen in upper tower bottom using pure oxygen space division technique in upper tower, and liquid oxygen pressurizes through liquid pump
Afterwards with lower tower bottom (30-40%O2) oxygen-enriched liquid air vaporizes in main heat exchanger after converging, in conjunction with oxygen-enriched space division technique, Jin Er
The oxygen-enriched liquid air that multiple hot medium is 80%~95% oxygen content is evaporated in main heat exchanger, compared to pure liquid oxygen, evaporating temperature
It is lower；It compresses in space division process inside, the more low corresponding air liquefaction temperature of the cryogenic liquid evaporating temperature backflowed is lower, in turn
Air liquefaction temperature and dew-point temperature are lower, and corresponding raw air pressure is lower, and the power consumption of corresponding air separation unit is lower；This
Outside upper tower bottom liquid oxygen converges after liquid pump is pressurizeed with lower tower bottom oxygen-enriched liquid air, and the continuity for being conducive to single unit system is raw
It produces, therefore the air separation unit of the utility model is conducive to save the power consumption of air separation unit, reduces production cost.
2) tower bottom produces liquid oxygen on, crude liquid argon in oxygen-enriched liquid air can be separated with liquid oxygen, be conducive to pure argon column and mention argon,
Upper tower bottom produces the oxygen-enriched liquid air of oxygen-enriched 80%~95% oxygen content in the prior art, and argon will be blended in nothing in product oxygen rich air
Method is extracted, and product argon can be extracted as conventional air separation plant by mentioning the oxygen-enriched space division technique of argon using the Full distillation of the utility model,
Process flow is saved, the production cost of enterprise is further decreased, increases economic efficiency.
It should be appreciated that as long as aforementioned concepts and all combinations additionally conceived described in greater detail below are at this
It can be viewed as a part of the utility model theme of the disclosure in the case that the design of sample is not conflicting.
The foregoing and other side of the utility model introduction can be more fully appreciated from the following description in conjunction with attached drawing
Face, embodiment and feature.The features and/or benefits of other additional aspects such as illustrative embodiments of the utility model
To be obvious in the following description, or will be learnt in the practice by the specific embodiment instructed according to the utility model.
Detailed description of the invention
Attached drawing is not intended to drawn to scale.In the accompanying drawings, identical or nearly identical group each of is shown in each figure
It can be indicated by the same numeral at part.For clarity, in each figure, not each component part is labeled.
Now, by by example and be described in reference to the drawings the utility model various aspects embodiment, in which:
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, the specific meaning of each component are as follows:
1- air filter, 2- air compressor, 3- air cooling tower, 4- molecular sieve purifier, tower under 5-, the upper tower of 6-, 7- are cold
Solidifying evaporator, 8- main heat exchanger, 9- are pressurized aftercooler, 10- supercharger, 11- expanding machine, 12- subcooler, the first crude argon of 13-
Tower, the second crude argon column of 14-, 15- pure argon column, 16- technique liquid argon pump, 17- crude argon condenser, 18- liquid pump, the evaporation of 19- essence argon
Device, 20- essence argon condenser.
Specific embodiment
In order to know more about the technology contents of the utility model, spy lifts specific embodiment and institute's accompanying drawings is cooperated to be described as follows.
It is described with reference to the various aspects of the utility model in the disclosure, shown in the drawings of the implementation of many explanations
Example.It is not intended to cover all aspects of the utility model for embodiment of the disclosure.It should be appreciated that a variety of structures presented hereinbefore
Think and embodiment, and those of describe in more detail below design and embodiment can in many ways in any one
Implement, this is because conception and embodiment disclosed in the utility model are not limited to any embodiment.In addition, this is practical
Novel disclosed some aspects can be used alone, or with it is disclosed by the utility model it is otherwise it is any it is appropriately combined come
It uses.
Based in the prior art, on the one hand the power consumption of its operation of existing air separation plant is high, problem at high cost, another party
The oxygen-enriched air separation plant of face routine obtains the pure air-liquid nitrogen of byproduct, but can not produce simultaneously pure while obtaining oxygen rich air
Gas oxygen or pure liquid oxygen, the phenomenon that can not also producing gas or liquid argon simultaneously, the utility model proposes a kind of Full distillation, to mention argon oxygen-enriched
Air separation unit had both been taken into account using this technique in conjunction with oxygen-enriched space division and pure oxygen space division and the low electricity of oxygen enriched liquid low temperature evaporation is prepared
The advantage of consumption, and take into account the advantage that liquid argon product is extracted as conventional space division.
Shown in reference to the accompanying drawing, the oxygen-enriched air separation unit of argon is mentioned to the Full distillation of the utility model and does further specific be situated between
It continues.
In conjunction with Fig. 1, the Full distillation of the utility model mentions the oxygen-enriched air separation unit of argon, including air pretreatment section, rectifying section and
Smart argon section.
The air pretreatment section includes the air filter 1 being sequentially connected, air compressor 2, air cooling tower 3 and molecular sieve
Purifier 4, the air pretreatment section be used to the dry removal of impurities of raw air obtaining dry purified air；Raw air is through sky
Air filter 1 removes dust and mechanical admixture, and the pressure that required technical process needs is compressed in air compressor 2, pressure
Contracting air is cooling through air cooling tower 3, subsequently into the molecular sieve purifier 4 of automatic switchover, for remove H2O、CO2And C2H2, with
And other hydrocarbons, the temperature for the drying purified air that the molecular sieve purifier 4 exports are 15~25 DEG C.
The rectifying section includes lower tower 5, upper tower 6, condenser/evaporator 7, main heat exchanger 8, pressurization aftercooler 9, supercharger
10, expanding machine 11, subcooler 12 and liquid pump 18；The condenser/evaporator 7 is arranged between lower tower 5 and upper tower 6；The essence argon
Section includes the first crude argon column 13, the second crude argon column 14, pure argon column 15, technique liquid argon pump 16, crude argon condenser 17, smart argon evaporator
19 and smart argon condenser 20.
The drying purified air outlet of above-mentioned molecular sieve purifier 4 is divided into three tunnels, and the dry purified air of the first via is changed with master
Hot 8 first feeding air runner of device, the 5 bottom air import of lower tower are sequentially connected, and the dry purified air passes through main heat exchanger 8
With the gas converting heat that backflows, it is cooled to condensing temperature, participates in rectifying into lower tower 5；The dry purified air in second road and supercharger
10 air inlets, pressurization 9 air inlet of aftercooler, 8 second feeding air runner of main heat exchanger, 11 air inlet of expanding machine and upper tower 6
Middle part air intlet is sequentially connected, and is pressurized by the supercharger 10 that expanding machine 11 coaxially drags, after the pressurization cooling of aftercooler 9
Into main heat exchanger 8 and the gas converting heat that backflows, it is cooled to temperature before expansion, air separation plant is produced into expanding machine 11 and normally transports
The required cooling capacity of row, the dry purified air in the second road after expansion enter upper tower 6 and participate in rectifying；Third road and instrument air system
Air inlet connection, the dry purified air in third road is as instrument supply gas and blanket gas.
The rectifying section further includes the gentle nitrogen producing line of liquid nitrogen producing line in addition to producing oxygen-enriched liquid air；The dry purifying in lower tower 5
Air at nitrogen and oxygen-enriched liquid air, obtains pure nitrogen gas in tower top by initial gross separation, and nitrogen is condensed the condensation of the liquid oxygen in evaporator 7
At liquid nitrogen；The liquid nitrogen outlet of the condenser/evaporator 7 is divided into four tunnels, the first via and the liquid nitrogen runner of subcooler 12, the liquid of upper tower 6
Nitrogen inlet is sequentially connected, and the liquid nitrogen of the first via sprays at the top of upper tower 6 after the supercooling of subcooler 12, first throttle valve decompression as upper
The phegma of tower 6；Second tunnel is connect with smart 20 inlet of argon condenser on 15 top of pure argon column, and liquid nitrogen passes through second throttle
Decompression enters tower top cold source of the smart argon condenser 20 as pure argon column 15；Third road is connect with lower 5 liquid nitrogen reflux mouth of tower, third
The liquid nitrogen on road returns to lower tower 5, the phegma as lower tower 5；4th tunnel connects liquid nitrogen product output pipe, is delivered to as product
Storage tank storage.
The gas nitrogen producing line of the rectifying section is from the air pretreatment section dry air outlet first via through main heat exchanger 8 first
Feeding air runner, the 5 bottom air import of lower tower, the 6 middle part liquid air import of upper tower, supreme 6 top of tower of 6 top liquid nitrogen import of upper tower
Nitrogen outlet；Second tunnel is through 10 air inlet of supercharger, pressurization 9 air inlet of aftercooler, 8 second feed air stream of main heat exchanger
Supreme 6 top nitrogen of the tower outlet of road, 11 air inlet of expanding machine, 6 middle part air intlet of upper tower；The nitrogen outlet of the gas nitrogen producing line
It is directly connected to nitrogen product output channel, as output of products.
Further combined with specific embodiment, the liquid nitrogen of the condenser/evaporator 7 exports liquid nitrogen stream of the first via through subcooler
Between road and the liquid nitrogen import of upper tower 6, it is provided with first throttle valve；The liquid nitrogen of the condenser/evaporator 7 exports the second Lu Yujing
Second throttle is provided between smart 20 inlet of argon condenser on 15 top of argon column；The oxygen-enriched liquid air of 5 bottom of lower tower
One way outlet is provided with third throttling between the oxygen-enriched liquid air import by 6 top of oxygen-enriched liquid air runner and upper tower of cooler 12
Valve；The second way outlet of oxygen-enriched liquid air of 5 bottom of lower tower through the oxygen-enriched liquid air runner of subcooler 12 and crude argon condenser 17 into
The 4th throttle valve is provided between liquid mouth.
The nitrogen outlet at 5 top of the lower tower is divided into two tunnels, the smart argon evaporator 19 of the first via and 15 lower part of pure argon column into
Port connection, a small amount of nitrogen enter bottom heat source of the smart argon evaporator 19 as pure argon column 15, the second tunnel and condenser/evaporator 7
Air inlet connection.
The oxygen-enriched liquid air outlet of 5 bottom of lower tower is divided into two tunnels after connecting with the oxygen-enriched liquid air runner of subcooler 12, the
It is connect all the way with the oxygen-enriched liquid air import on upper 6 top of tower, the oxygen-enriched liquid air of the first via enters upper tower 6 after the decompression of third throttle valve
Top, the raw material as upper tower 6；Second tunnel is connect with 17 inlet of crude argon condenser, and the oxygen-enriched liquid air on the second tunnel passes through the 4th
Throttle valve decompression enters crude argon condenser 17, oxygen-enriched respectively as the tower top cold source of the first crude argon column 13 and the second crude argon column 14
The steam of liquid air enters upper tower 6 as raw material.
The drying purified air of the upper tower 6 passes through secondary rectifying, obtains purity nitrogen, and 6 top of upper tower at the top of upper tower 6
Purity nitrogen outlet be sequentially connected with the purity nitrogen runner of subcooler 12, the purity nitrogen runner of main heat exchanger 8, product nitrogen gas output channel,
Purity nitrogen vaporizes re-heat cooling box through subcooler 12, main heat exchanger 8, is directly sent by pipeline with gas point or storage as product nitrogen gas
Tank.
6 bottom of upper tower is connect with condenser/evaporator 7, upper 6 bottom of tower by pure oxygen air separation process obtain pure liquid oxygen into
Enter the evaporation of condenser/evaporator 7, upflowing vapor of the oxygen as upper tower 6 after evaporation, the outlet of liquid oxygen autocondensation evaporator 7 is divided into two
Road, the first via connect pure liquid oxygen product conveyance conduit as product liquid oxygen, the second tunnel and liquid pump 18,5 bottom of lower tower it is oxygen-enriched
Liquid air outlet is sequentially connected, purity 30-40%O of the second road liquid oxygen after the pressurization of cryogenic liquid pump 18 with lower 5 bottom of tower2It is oxygen-enriched
Liquid air converges, and forms oxygen-enriched air separation process, and the liquid after converging is connect with 8 liquid oxygen of main heat exchanger evaporation runner, through main heat exchanger 8
The oxygen-enriched liquid air cooling box that re-heat is 80~95% oxygen content of purity is vaporized, substantially reduces air liquefaction temperature in system, in turn
So that air liquefaction temperature and dew-point temperature reduce, then the raw air pressure corresponding to it is lower, the electricity of corresponding air separation unit
Consume lower, reduction production cost.
In some embodiments, above-mentioned first via liquid oxygen may also pass through 8 re-heat cooling box of main heat exchanger, produce as oxygen
Product output storage, further increases and enriches the byproduct that whole Full distillation proposes the oxygen-enriched space division technique process of argon.
Dirty nitrogen, the dirt of the dirt nitrogen outlet and dirty the nitrogen runner, main heat exchanger 8 of subcooler 12 are also obtained on upper 6 top of tower
Nitrogen runner is sequentially connected, and two tunnels are divided into after vaporizing re-heat cooling box, and the first via is connect with dirty nitrogen output channel, the first via
Dirty nitrogen is vented by output channel in water-cooling tower；Second tunnel is connect with purifier dirt nitrogen inlet, as regeneration gas.
It is pushed up with the 13 bottom argon fraction import of the first crude argon column, the first crude argon column 13 the argon fraction outlet of 6 lower part of upper tower
The thick gas argon outlet in portion and the thick gas argon import in 14 bottom of the second crude argon column are sequentially connected, i.e., extract the 7- of amount containing argon out in upper 6 lower part of tower
12% thick gas argon fraction enters 13 bottom of the first crude argon column, and thick gas argon fraction rises to top from 13 bottom of the first crude argon column
Portion rises to top, in the process, crude argon fraction from 14 bottom of the second crude argon column subsequently into 14 bottom of the second crude argon column
In oxygen content it is lower and lower, obtained at the top of the second crude argon column 14 oxygen content be not more than 1.5PPm process argon.
First crude argon column 13 and the second crude argon column 14 are coupled by technique liquid argon pump 16, the first crude argon column 13 and the second crude argon
The cold source of tower 14 comes from low pressure liquid air evaporation endothermic；Wherein, theoretically the first crude argon column 13 and the second crude argon column 14 should be belonged to
The same equipment, but the first crude argon column 13 and 14 combined altitudes of the second crude argon column are excessively high in the actual production process, are unfavorable for
Production and assembly construction are so be divided into individual two crude argon columns, two crude argon column withdrawing fluid technique liquid argon pumps 16 from second
14 bottom of crude argon column is sent to the top of the first crude argon column 13, thus by the first crude argon column 13 and the second crude argon column 14 be coupled into it is similar with
One equipment realizes crude argon purification process.
The process argon outlet at second crude argon column, 14 top is divided into two tunnels, the first via and 17 process argon of crude argon condenser into
Mouth and 14 crude argon refluxing opening of the second crude argon column are sequentially connected, and process argon enters crude argon condenser 17, with after liquid air heat exchange condensation times
The second crude argon column 14 is flow to as phegma, phegma to 14 bottom of the second crude argon column is sent again after the pressurization of technique liquid argon pump 16
Enter at the top of the first crude argon column 14 as phegma；Second tunnel is connect with the process argon import at 15 middle part of pure argon column, and in pure argon column
Denitrification is removed in 15, obtains the pure liquid argon that nitrogen content is not more than 4PPm in 15 bottom of pure argon column, and the cold source at 15 top of pure argon column comes
It is evaporated from low pressure liquid nitrogen, heat source is evaporated from the condensation of lower 6 top section gas nitrogen of tower in 15 bottom of pure argon column.
The pure liquid argon outlet of 15 bottom of pure argon column connects pure liquid argon product conveyance conduit；20 gas of essence argon condenser
Nitrogen converges with the outlet of upper 6 top dirt nitrogen of tower to be connect with the dirty nitrogen runner of subcooler 12, main heat exchanger 8；Second crude argon column 14
The crude liquid argon outlet of bottom is connect with 16 import of technique liquid argon pump, is connect with the 13 top crude liquid argon import of the first crude argon column, and upper
The argon fraction of 6 lower part of tower, which flows back, to be connected.
The Full distillation of the utility model is oxygen-enriched to propose argon technical process, and air flows into rectifying section by air pretreatment section and mentions
Argon section, compared to the prior art in air separation unit greatly reduce the consumption of electricity in device production preparation process, and product
Type is more, is conducive to enterprise's consecutive production, and reduces enterprise's production cost, improves Business Economic Benefit.
Although the utility model has been disclosed with preferred embodiment as above, so it is not intended to limit the utility model.This reality
It is without departing from the spirit and scope of the utility model, each when that can make with novel those of ordinary skill in the art
Kind changes and retouches.Therefore, the protection scope of the utility model is subject to view those as defined in claim.
Claims (8)
1. a kind of Full distillation mentions the oxygen-enriched air separation unit of argon, including air pretreatment section, the air pretreatment section be used to prepare
Dry purified air is transmitted to rectifying section；It is characterized in that, further including rectifying section and proposing argon section；
The rectifying section include lower tower (5), upper tower (6), condenser/evaporator (7), main heat exchanger (8), pressurization aftercooler (9),
Supercharger (10), expanding machine (11), subcooler (12) and liquid pump (18)；The condenser/evaporator (7) setting in Xia Ta (5) and
Between upper tower (6)；
It is described mention argon section include the first crude argon column (13), it is the second crude argon column (14), pure argon column (15), technique liquid argon pump (16), thick
Argon condenser (17), smart argon evaporator (19) and smart argon condenser (20)；
The dry purified air outlet of the air pretreatment section is divided into three tunnels, the first via and (8) first feeding air of main heat exchanger
Runner, lower tower (5) bottom air import are sequentially connected, the second tunnel and supercharger (10) air inlet, pressurization aftercooler (9) air inlet
Air intlet is sequentially connected in the middle part of mouth, (8) second feeding air runner of main heat exchanger, expanding machine (11) air inlet and upper tower (6),
Third road is connect with instrument air system air inlet；
Nitrogen outlet at the top of the lower tower (5) is divided into two tunnels, and the first via is connect with condenser/evaporator (7) air inlet；Second tunnel
It is connect with smart argon evaporator (19) air inlet of pure argon column (15) lower part；
The oxygen-enriched liquid air outlet of lower tower (5) bottom is divided into two tunnels after connecting with the oxygen-enriched liquid air runner of subcooler (12), the
It is connect all the way with the oxygen-enriched liquid air import on upper tower (6) top, the second tunnel is connect with crude argon condenser (17) inlet；
Condenser/evaporator (7) the liquid nitrogen runner exit is divided into two tunnels, and the liquid nitrogen reflux mouth at the top of the first via and lower tower (5) connects
It connects, the second tunnel is connect with the liquid nitrogen runner of subcooler (12)；
The liquid nitrogen runner exit of the subcooler (12) is divided into three tunnels, and the first via is connect with liquid nitrogen reflux mouth at the top of upper tower (6), the
Two tunnels connect pure liquid nitrogen product conveyance conduit, third Lu Yujing argon condenser (20) liquid nitrogen import connection as nitrogen products；
Upper tower (6) bottom is connect with condenser/evaporator (7), and the liquid oxygen of upper tower (6) bottom enters condenser/evaporator (7), liquid
Oxygen autocondensation evaporator (7) outlet is divided into two tunnels, and the first via connects pure liquid oxygen product conveyance conduit, the second tunnel as product liquid oxygen
Oxygen-enriched liquid air outlet with liquid pump (18), lower tower (5) bottom is sequentially connected, the liquid after converging and main heat exchanger (8) liquid oxygen
Evaporate runner connection；
The dirty nitrogen outlet on upper tower (6) top is connect with the dirty nitrogen runner of subcooler (12), main heat exchanger (8)；
Purity nitrogen outlet at the top of the upper tower (6) is connect with the purity nitrogen runner of subcooler (12), main heat exchanger (8)；
The outlet of argon fraction and the argon fraction import of the first crude argon column (13) bottom, the first crude argon column (13) of upper tower (6) lower part
The thick gas argon outlet in top and the thick gas argon import in the second crude argon column (14) bottom are sequentially connected；
Process argon outlet at the top of second crude argon column (14) is divided into two tunnels, the first via and crude argon condenser (17) process argon into
Mouth and the second crude argon column (14) crude argon refluxing opening are sequentially connected, and the second tunnel is connect with the process argon import in the middle part of pure argon column (15)；
The pure liquid argon outlet of pure argon column (15) bottom connects pure liquid argon product conveyance conduit；
Essence argon condenser (20) the gas nitrogen and the outlet of upper tower (6) top dirt nitrogen converge and subcooler (12), main heat exchanger (8)
Dirty nitrogen runner connection；
The crude liquid argon outlet of second crude argon column (14) bottom is connect with technique liquid argon pump (16) import, with the first crude argon column
(13) top crude liquid argon import connection flows back with the argon fraction of upper tower (6) lower part and connects.
2. Full distillation according to claim 1 mentions the oxygen-enriched air separation unit of argon, which is characterized in that the air pretreatment section packet
Include the air filter (1) being sequentially connected, air compressor (2), air cooling tower (3) and molecular sieve purifier (4)；The air is pre-
Processing section be used to the dry removal of impurities of raw air obtaining dry purified air, and be transmitted to rectifying section rectification and purification.
3. Full distillation according to claim 1 mentions the oxygen-enriched air separation unit of argon, which is characterized in that the rectifying section includes liquid nitrogen
Producing line；
The liquid nitrogen producing line is exported from air pretreatment section dry air through (8) first feeding air runner of main heat exchanger, lower tower
(5) bottom air import, the outlet of lower tower (5) top nitrogen, condenser/evaporator (7) nitrogen inlet to condenser/evaporator (7) liquid nitrogen
Outlet.
4. Full distillation according to claim 3 mentions the oxygen-enriched air separation unit of argon, which is characterized in that the liquid nitrogen of the liquid nitrogen producing line
Outlet be divided into four tunnels, the first via and the liquid nitrogen import of the liquid nitrogen runner, upper tower (6) of subcooler (12) are sequentially connected, the second tunnel and
Smart argon condenser (20) inlet on pure argon column (15) top connects, and third road is connect with lower tower (5) liquid nitrogen reflux mouth, the 4th tunnel
Connect liquid nitrogen product output pipe.
5. Full distillation according to claim 1 mentions the oxygen-enriched air separation unit of argon, which is characterized in that the rectifying section includes gas nitrogen
Producing line；
The gas nitrogen producing line is from the air pretreatment section dry air outlet first via through (8) first feed air stream of main heat exchanger
Road, lower tower (5) bottom air import, the liquid air import of upper tower (6) middle part, upper tower (6) the top supreme tower of liquid nitrogen import (6) top nitrogen
Gas outlet；Second tunnel is through supercharger (10) air inlet, pressurization aftercooler (9) air inlet, (8) second feeding air of main heat exchanger
Runner, expanding machine (11) air inlet, air intlet supreme tower (6) the top nitrogen outlet of upper tower (6) middle part.
6. Full distillation according to claim 5 mentions the oxygen-enriched air separation unit of argon, which is characterized in that the nitrogen of the gas nitrogen producing line
Outlet is directly connected to nitrogen product output channel.
7. Full distillation according to claim 1 mentions the oxygen-enriched air separation unit of argon, which is characterized in that the first crude argon column (13) and
Two crude argon columns (14) are coupled using technique liquid argon pump (16).
8. Full distillation according to claim 4 mentions the oxygen-enriched air separation unit of argon, which is characterized in that the condenser/evaporator (7)
Liquid nitrogen outlet liquid nitrogen runner of the first via through subcooler and the liquid nitrogen import of upper tower (6) between, be provided with first throttle valve；Institute
The liquid nitrogen for stating condenser/evaporator (7) exports to be arranged between the second tunnel and smart argon condenser (20) inlet on pure argon column (15) top
There is second throttle；The first way outlet of oxygen-enriched liquid air of lower tower (5) bottom by cooler (12) oxygen-enriched liquid air runner with
Third throttle valve is provided between the oxygen-enriched liquid air import on upper tower (6) top；The second tunnel of oxygen-enriched liquid air of lower tower (5) bottom
It exports the oxygen-enriched liquid air runner through subcooler (12) and is provided with the 4th throttle valve between crude argon condenser (17) inlet.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186179A (en) * | 2018-09-30 | 2019-01-11 | 苏州制氧机股份有限公司 | Full distillation proposes the oxygen-enriched air separation unit of argon and technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186179A (en) * | 2018-09-30 | 2019-01-11 | 苏州制氧机股份有限公司 | Full distillation proposes the oxygen-enriched air separation unit of argon and technique |
| CN109186179B (en) * | 2018-09-30 | 2023-09-19 | 苏州制氧机股份有限公司 | Full-rectification argon extraction oxygen-enriched air separation device and process |
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