CN104482719B - Cryogenic liquid returns filling device - Google Patents
Cryogenic liquid returns filling device Download PDFInfo
- Publication number
- CN104482719B CN104482719B CN201410774848.XA CN201410774848A CN104482719B CN 104482719 B CN104482719 B CN 104482719B CN 201410774848 A CN201410774848 A CN 201410774848A CN 104482719 B CN104482719 B CN 104482719B
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- Prior art keywords
- globe valve
- liquid oxygen
- cryogenic globe
- valve
- cryogenic
- 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.)
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- 239000007788 liquid Substances 0.000 title claims abstract description 22
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000006200 vaporizer Substances 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 abstract description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005204 segregation Methods 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 239000000047 product Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F25J3/04406—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
- F25J3/04472—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
- F25J3/04478—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for controlling purposes, e.g. start-up or back-up procedures
-
- 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
- F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
- F25J2235/04—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams using a pressure accumulator
-
- 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream being oxygen
-
- 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
- F25J2280/00—Control of the process or apparatus
- F25J2280/10—Control for or during start-up and cooling down of the installation
-
- 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
- F25J2290/62—Details of storing a fluid in a tank
Landscapes
- 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 cryogenic liquid and return filling device, rectifying column master is cold, and the valve that is adjusted connects liquid oxygen vessel entrance, the outlet of liquid oxygen vessel connects air vaporizer through the 4th cryogenic globe valve, the outlet of air vaporizer connects liquid oxygen vessel, it is cold that the outlet of liquid oxygen vessel connects rectifying column master through the second cryogenic globe valve and the first cryogenic globe valve the most successively, relief valve and the 3rd cryogenic globe valve are installed on the vacuum heat-insulating pipe being connected between the second cryogenic globe valve with the first cryogenic globe valve, on the connection pipeline of liquid oxygen vessel and the 4th cryogenic globe valve, the 5th cryogenic globe valve is installed, the liquid oxygen of liquid oxygen vessel exports through the 5th cryogenic globe valve.It is cold to rectifying column master that the liquid oxygen of original production is directly returned tank by the present invention, can quickly meet the condition setting up the air separation unit start pure operating mode of tune, owing to the available machine time shortens, decrease the labor intensity of employee's operation, and simple to operate, economical and practical, it is adaptable to the power-on operation of any a set of large-scale air segregation apparatus.
Description
Technical field
The invention belongs to making oxygen by air separation technical field, return filling device particularly to a kind of cryogenic liquid that can shorten the air separation unit startup time.
Background technology
The basic functional principle of air separation oxygenerator (hereinafter referred to as air separation unit) is: the boiling point according to component each in air is different, utilize cryogenic refrigeration method, air is compressed to about 0.5MPa, it is cooled to after-170 DEG C (liquid oxygen boiling points) liquefy below again, in rectifying tower plates, filler, gas-liquid is through complicated heat and mass transfer process, part evaporation repeatedly and partial condensation, finally realize the separation of the components such as highly purified oxygen, nitrogen, argon.Major part gaseous product is pressurized to desirable pressure by compressor and is sent to the user such as steel mill and iron-smelter, and a small amount of liquid form product is separately stored in different low temperature storing tanks as the side-product of space division.
Air separation unit is due to plan repair, the maintenance of equipment fault unplanned property, the electrically operated or power network fluctuation failure and other reasons of electrical network, and air separation unit the most inevitably to be shut down several times.Turning back on after space division shutdown every time, discharge opeing; particularly go into operation after debugging is started shooting or heated greatly comprehensively and start shooting; cold wretched insufficiency; two decompressors run refrigeration simultaneously; reach product to overall product purity and up to standard be also required to more than 56 hours; cause electricity consumption of equipment amount big, even affect steel-making, the rhythm of production of ironmaking system and yield.Therefore, how to shorten the space division available machine time, quickly go out oxygen, go out nitrogen, be a major subjects all the time studying of air separation industry.
Summary of the invention
Liquid oxygen when it is an object of the invention to provide the start of a kind of air separation unit returns filling device, prevents a large amount of liquid gasification, carries out liquid oxygen and return filling, it is achieved fast velocity modulation pure go out product, shorten air separation unit and start shooting out time of oxygen, nitrogen, save start power consumption.
For solving above-mentioned technical problem, the technical scheme is that cryogenic liquid returns filling device, including rectifying column, master is cold, described rectifying column master is cold, and the valve that is adjusted connects liquid oxygen vessel entrance, the outlet of liquid oxygen vessel connects air vaporizer through the 4th cryogenic globe valve, the outlet of air vaporizer connects liquid oxygen vessel, it is cold that the outlet of liquid oxygen vessel connects rectifying column master through the second cryogenic globe valve and the first cryogenic globe valve the most successively, relief valve and the 3rd cryogenic globe valve are installed on the vacuum heat-insulating pipe being connected between the second cryogenic globe valve with the first cryogenic globe valve, on the connection pipeline of liquid oxygen vessel and the 4th cryogenic globe valve, the 5th cryogenic globe valve is installed, the liquid oxygen of liquid oxygen vessel exports through the 5th cryogenic globe valve.
The present invention is compared with prior art, it has the technical effect that that the liquid oxygen of original production directly returns tank is cold to rectifying column master, can quickly meet the condition setting up the air separation unit start pure operating mode of tune, owing to the available machine time shortens, decrease the labor intensity of employee's operation, and simple to operate, economical and practical, it is adaptable to the power-on operation of any a set of large-scale air segregation apparatus.
Accompanying drawing explanation
Fig. 1 is that liquid oxygen of the present invention returns filling device schematic diagram.
In figure: 1, rectifying column master is cold, 2, liquid oxygen vessel, 3, air vaporizer, 4, regulation valve, 5, the first cryogenic globe valve, the 6, second cryogenic globe valve, the 7, the 3rd cryogenic globe valve, 8, relief valve, 9, the 4th cryogenic globe valve, 10, vacuum heat-insulating pipe, the 11, the 5th cryogenic globe valve.
Detailed description of the invention
The present invention is further described with embodiment below in conjunction with the accompanying drawings.See Fig. 1, cryogenic liquid returns filling device, including rectifying column master cold 1, described rectifying column master cold 1 is adjusted valve 4 and connects liquid oxygen vessel 2 entrance, the outlet of liquid oxygen vessel 2 connects air vaporizer 3 through the 4th cryogenic globe valve 9, the outlet of air vaporizer 3 connects liquid oxygen vessel 2, the outlet of liquid oxygen vessel 2 connects rectifying column master cold 1 through the second cryogenic globe valve 6 and the first cryogenic globe valve 5 the most successively, relief valve 8 and the 3rd cryogenic globe valve 7 are installed on the vacuum heat-insulating pipe 10 being connected between second cryogenic globe valve 6 with the first cryogenic globe valve 5, on the connection pipeline of liquid oxygen vessel 2 and the 4th cryogenic globe valve 9, the 5th cryogenic globe valve 11 is installed, the liquid oxygen of liquid oxygen vessel 2 exports through the 5th cryogenic globe valve 11.
Embodiment:As it is shown in figure 1, cryogenic liquid of the present invention returns filling device, produce when former air separation unit is properly functioning on the pipeline of liquid oxygen, connect the vacuum heat-insulating pipe 10 of φ 40mm, be connected bottom liquid oxygen vessel 2；Equipped with two DN40 cryogenic globe valve on vacuum heat-insulating pipe 10, it may be assumed that first cryogenic globe valve the 5, second cryogenic globe valve 6；For preventing pipeline super high pressure accident, installing relief valve 8 and the 3rd cryogenic globe valve 7 between the first cryogenic globe valve 5 and the second cryogenic globe valve 6, opening the 3rd cryogenic globe valve 7 can carry out pre-cooling to vacuum heat-insulating pipe 10；When the properly functioning cold of space division is more, production fluid regulates valve 4 production department separatory oxygen and enter liquid oxygen vessel 2；When liquid oxygen needs to return filling, opening the 4th cryogenic globe valve 9, liquid by thermal evaporation feed liquor oxygen storage tank 2, makes liquid oxygen vessel 2 pressure raise through air vaporizer 3, is pressed in rectifying column master cold 1 by returning perfusion road vacuum heat-insulating pipe 10.
As comprehensive cooling stage (100m in air separation unit start tower3Substitute the bad for the good in liquid oxygen vessel 2 60m in advance3Above liquid oxygen), on the premise of the second cryogenic globe valve 6, regulation valve 4 are closed, open the 3rd cryogenic globe valve the 7, first cryogenic globe valve 5, carrying out pre-cooling with the cold air in rectifying column master cold 1 to returning perfusion road vacuum heat-insulating pipe 10, slightly opening the 4th cryogenic globe valve 9 increases to 0.45MPa～0.55MPa by storage tank pressure simultaneously.When close-170 DEG C of the cold 1 internal cooling temperature of rectifying column master, check that the 3rd cryogenic globe valve 7 blows down mouth cold air situation, when there being a small amount of liquid to discharge, rectifying column master cold 1 enters the hydrops stage, filling is returned in starting 1 tower cold to rectifying column master, open the second cryogenic globe valve 6, close the 3rd cryogenic globe valve 7, keep air vaporizer 3 to run and control storage tank pressure well all the time at 0.45MPa～0.55MPa, after 2～3 hours, in rectifying column master cold 1, liquid oxygen liquid level reaches 3200mm water column design requirement (the most complete by expander refrigeration accumulation liquid level needs about 13 hours), the start of making oxygen by air separation machine switches into the tune pure stage.Close the 4th cryogenic globe valve 9, stop supercharging；Close the first cryogenic globe valve 5, stop liquid oxygen and return filling；Space division start terminates properly functioning.After air separation unit is properly functioning, in cold 1 tower of rectifying column master, liquid oxygen has more than needed, can drive regulation valve and discharge into liquid oxygen vessel 24 times.
The present invention is to be improved realization in car device return filling requirement original filling.By going out on space division rectifying column loxygen discharge pipe, connect bottom vacuum heat-insulating pipe 10 to liquid oxygen vessel 2, at air separation unit start cooling stage, when cold 1 internal temperature of rectifying column master reaches-170 DEG C and has a small amount of liquid to be discharged by the 3rd cryogenic globe valve 7, illustrate that pipeline is the coldest.Liquid after liquid oxygen vessel 2 supercharging is returned by this device vacuum heat-insulating pipe 10 and pours into rectifying column master cold 1, make the quick hydrops of rectifying column master cold 1 to design safety liquid level, rapidly enter the tune pure stage.This liquid oxygen returns equipment that tank technology relates to, pipeline, valve have: air separation plant rectifying column master is cold 1,100m3Liquid oxygen vessel 2, air vaporizer 3, first, second, third cryogenic globe valve 5,6,7 use DN40 cryogenic globe valve, the four, the 5th cryogenic globe valve 9,11 to use DN25 low temperature long stem valve, vacuum heat-insulating pipe 10 to use φ 40mm vacuum tube, relief valve 8 one.The present invention's comes into operation, and makes air separation unit reach product reaching standard time from start to product and shortens 10 hours, can save electric quantity consumption about 120,000 degree, removes consumption cold and return liquid filling oxygen 30m3Funds, the biggest start energy consumption funds can save more than 50 ten thousand yuan.
The present invention comes into operation it should be noted that start shooting cooling stage in advance by cold for vacuum heat-insulating pipe 10 at air separation unit；Before returning the operation of liquid filling oxygen, rectifying column master cold 1 the discharge blowing mouth of cold to-170 DEG C and the 3rd cryogenic globe valve 7 must have entrained liquid phenomenon, forbids to return in advance filling, prevents thermal stress excessive, damage equipment.Low-temperature liquid oxygen is filled rectifying column master cold 1 by quick after liquid oxygen vessel 2 supercharging by the present invention, enters adjust the pure stage so that air separation unit shifts to an earlier date 10 hours, it is achieved shortening the available machine time, it is up to standard that product quickly reaches product, the purpose of energy efficient.
Claims (1)
1. cryogenic liquid returns filling device, and including rectifying column, master is cold, it is characterised in that described rectifying column master is cold, and the valve that is adjusted connects liquid
Oxygen reservoir inlet port, the outlet of liquid oxygen vessel connects air vaporizer through the 4th cryogenic globe valve, and the outlet of air vaporizer is even
Connecing liquid oxygen vessel, it is cold that the outlet of liquid oxygen vessel connects rectifying column master through the second cryogenic globe valve and the first cryogenic globe valve the most successively,
Relief valve and the cut-off of the 3rd low temperature are installed on the vacuum heat-insulating pipe being connected between the second cryogenic globe valve with the first cryogenic globe valve
Valve, liquid oxygen vessel outlet conduit is provided with the 5th cryogenic globe valve, and the liquid oxygen of liquid oxygen vessel exports through the 5th cryogenic globe valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410774848.XA CN104482719B (en) | 2014-12-16 | 2014-12-16 | Cryogenic liquid returns filling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410774848.XA CN104482719B (en) | 2014-12-16 | 2014-12-16 | Cryogenic liquid returns filling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104482719A CN104482719A (en) | 2015-04-01 |
| CN104482719B true CN104482719B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410774848.XA Active CN104482719B (en) | 2014-12-16 | 2014-12-16 | Cryogenic liquid returns filling device |
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| CN (1) | CN104482719B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135821A (en) * | 2015-09-02 | 2015-12-09 | 云南锡业股份有限公司铜业分公司 | Method for shortening liquid accumulation time of air separation oxygen generation system by adopting liquid oxygen recharge |
| CN105300031B (en) * | 2015-11-11 | 2017-07-11 | 巴彦淖尔市飞尚铜业有限公司 | A kind of startup method for quickly going out oxygen |
| CN105758123B (en) * | 2016-04-22 | 2018-02-23 | 天脊煤化工集团股份有限公司 | A kind of method and device for preventing hydrocarbon compound accumulation blast |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2692484A (en) * | 1950-04-24 | 1954-10-26 | Air Liquide | Separation of gaseous mixtures |
| DE10158327A1 (en) * | 2001-11-28 | 2003-06-18 | Linde Ag | Process and apparatus for producing high purity nitrogen from less pure nitrogen |
| CN201413000Y (en) * | 2009-06-02 | 2010-02-24 | 武汉钢铁(集团)公司 | Novel air separation device |
| CN102829606A (en) * | 2012-09-08 | 2012-12-19 | 浙江海天气体有限公司 | Air separation unit for preparing high-purity liquid nitrogen by utilizing liquid oxygen reladling |
| CN204329469U (en) * | 2014-12-16 | 2015-05-13 | 新余钢铁集团有限公司 | Cryogenic liquid returns filling device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6086016A (en) * | 1983-05-31 | 1985-05-15 | Ishikawajima Harima Heavy Ind Co Ltd | Purification of liquefied carbonic acid |
| JPH0579754A (en) * | 1991-09-20 | 1993-03-30 | Hitachi Ltd | Manufacturing method of high purity nitrogen |
-
2014
- 2014-12-16 CN CN201410774848.XA patent/CN104482719B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2692484A (en) * | 1950-04-24 | 1954-10-26 | Air Liquide | Separation of gaseous mixtures |
| DE10158327A1 (en) * | 2001-11-28 | 2003-06-18 | Linde Ag | Process and apparatus for producing high purity nitrogen from less pure nitrogen |
| CN201413000Y (en) * | 2009-06-02 | 2010-02-24 | 武汉钢铁(集团)公司 | Novel air separation device |
| CN102829606A (en) * | 2012-09-08 | 2012-12-19 | 浙江海天气体有限公司 | Air separation unit for preparing high-purity liquid nitrogen by utilizing liquid oxygen reladling |
| CN204329469U (en) * | 2014-12-16 | 2015-05-13 | 新余钢铁集团有限公司 | Cryogenic liquid returns filling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104482719A (en) | 2015-04-01 |
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