CN108168210A - Method for producing oxygen through and system - Google Patents
Method for producing oxygen through and system Download PDFInfo
- Publication number
- CN108168210A CN108168210A CN201810074703.7A CN201810074703A CN108168210A CN 108168210 A CN108168210 A CN 108168210A CN 201810074703 A CN201810074703 A CN 201810074703A CN 108168210 A CN108168210 A CN 108168210A
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- China
- Prior art keywords
- rectifying column
- oxygen
- liquid
- pure oxygen
- gas
- 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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Classifications
-
- 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
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
- F25J3/04066—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of 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
- 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
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04109—Arrangements of compressors and /or their drivers
- F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
- F25J3/04121—Steam turbine as the prime mechanical driver
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The present invention discloses a kind of simple, at low cost, efficient, the achievable unattended method for producing oxygen through of process and system；The preparation method of pure oxygen, it includes compression, cooling, the steam separation carried out successively, dry step；In dried gas A is directly entered at the top of rectifying column, simultaneously, the liquid pure oxygen of low temperature or liquid purity nitrogen are sent directly into rectifying column, is cooled down by liquid pure oxygen or liquid purity nitrogen to entering the gas A in rectifying column, the temperature of gas A is made to reach below boiling point/boiling point of oxygen；It includes rectifying column to oxygen generation system, and rectifying column is equipped with the air inlet being sent into dried gas in rectifying column, which is characterized in that the rectifying column is equipped with the low-temperature receiver import for providing source with liquid pure oxygen or liquid purity nitrogen and connecting.
Description
Technical field
The present invention relates to oxygen preparing technical field more particularly to a kind of method for producing oxygen through and systems.
Background technology
Since oxygen is difficult Volatile Colstituent, nitrogen is volatile component, in rectifying condensation process, under the oxygen condensation more more than nitrogen
Come, improve the purity of nitrogen in gas, oxygen condensation sinking, so as to which pure oxygen be made, in the prior art, in order to which the oxygen of high-purity is made
Gas, mainly pass sequentially through compression, cooling, two-stage compression, cool down again, steam separation, drying, compression-expansion, the operations such as rectifying i.e.
Pure oxygen can be made, referring to Fig. 1.
In above-mentioned flow, compression-expansion is an extremely crucial link, passes through compression-expansion, the air of cryogenic high pressure
The temperature of air is made to decline again after being re-compressed then throttling expansion and reach the boiling point of oxygen hereinafter, then making oxygen, nitrogen
Separation；Using turbo-expander in compression-expansion, had as a drawback that in oxygen is prepared using turbo-expander：
1. turbo-expander is in compression swelling refrigeration high speed rotation（40000 revs/min）, needed at work by a large amount of air
Compression, inner heat causes to be increased by compressed air, and the air entered before rectifying needs to be down to the boiling point of oxygen hereinafter, because
This is needed the temperature after air compression-expansion in this compression-expansion link less than 5 DEG C -8 DEG C below the boiling temperature of oxygen, this is just
It is required that the high power of turbo-expander, high loaded process, thus lead to existing turbo-expander waste air, waste work done during compression.
2. since turbo-expander rotates（40000 revs/min）Speed is fast, internal easily fever, therefore its internal shaft and leaf
Wheel is vulnerable part, and its internal part is precision part, causes high failure rate, maintenance cost height, oxygen generation efficiency low.
3. the pure oxygen recovery rate prepared by existing compression-expansion is only 75%-80%, recovery rate is low, causes to produce oxygen per ton
The production cost increases.
4. preparing pure oxygen mode by existing compression-expansion, because turbo-expander is vulnerable part, personnel's real time inspection is needed
Turbo-expander needs 8-10 people to operate, cost of labor is caused to increase altogether in production.
In addition to this, it in small-sized oxygen processed, is used using piston machine as air compressor machine, since its inner body complexity uses
In its vulnerable part it is more and efficiency is low, using Piston Expander and oily screw air compressor due to working for a long time, oxygen system processed
In system chemical explosion risk can be generated since oil is contacted with oxygen；Dry type oil free screw air compressor machine is since inside is coated with coating, the painting
Layer needs to replace it using coming off after 2 years, furthermore, oil free screw air compressor machine without cooling system, cause its spoilage it is high,
High energy consumption；To sum up, screw air compressor described above is not suitable for small-sized the manufacture of oxygen enterprise use.
Invention content
It is an object of the invention to overcome the deficiencies in the prior art, adapt to real needs, disclose a kind of method for producing oxygen through and be
System.
In order to achieve the object of the present invention, the technical solution adopted in the present invention is：
A kind of preparation method of pure oxygen is designed, it includes compression, cooling, the steam separation carried out successively, dry step；It is special
Sign is：In dried gas A is directly entered at the top of rectifying column, meanwhile, the liquid pure oxygen of low temperature or liquid purity nitrogen is direct
It is sent into rectifying column, is cooled down by liquid pure oxygen or liquid purity nitrogen to entering the gas A in rectifying column, make the temperature of gas A
Degree reaches below boiling point/boiling point of oxygen.
The compression compresses air using water helical-lobe compressor.
Further, a kind of oxygen generation system has also been devised in the present invention, and this system uses method as described above, it includes rectifying
Tower, rectifying column are equipped with the air inlet being sent into dried gas in rectifying column, and the rectifying column is equipped with and liquid pure oxygen
Or liquid purity nitrogen provides the low-temperature receiver import of source connection, low-temperature receiver import provides source with external liquid pure oxygen or liquid purity nitrogen and connect.
It further include water helical-lobe compressor, connection corresponding with water helical-lobe compressor gas outlet cooler and cooling device
The steam trap of gas outlet connection, the drying device being connect with steam trap gas outlet, the gas outlet of the drying device
It is connect with the air inlet on rectifying column.
The pipeline connected between the low-temperature receiver import and liquid pure oxygen or liquid purity nitrogen offer source is equipped with throttle expansion valve.
The beneficial effects of the present invention are：
This system change conventional compression expansion fashion, using low temperature pure oxygen directly to enter rectifying column in pressure-air directly into
Row cooling is handled, and is had the following advantages in implementation：
1. this system abandons existing turbo-expander, process can be simplified, reduce production cost；
2. the method for the present invention uses the injection cryogenic energy source directly into rectifying column that can directly reduce temperature in tower, most directly may be used
The temperature for the gas that is distillated is reduced, it is made to reach boiling temperature in a short time hereinafter, realizing rectifying balance, improves rectification efficiency
And quality, reduce operating cost.
3. this system has abandoned turbine expansion link because of it in force, garrison and check, it can be achieved that 1 people in real time without personnel
Oxygen operation processed can be completed in operation, can substantially reduce personnel cost, reduce production cost；It, can be real with reference to existing technology of Internet of things
Existing unattended oxygen processed, can substantially reduce cost of labor, and be greatly improved production efficiency, and long-range unattended oxygen processed is become
It may.
4. the yield of this system in production is 50m3/ h, 0.7 yuan/m of the cost depreciations such as electricity, water3, it is far smaller than existing into
This 1.5-2.0 members/m3Cost.
5. process is simple in force for this system, is easily achieved, it is particluarly suitable for using in small-sized oxygen processed, has huge
Application value.
6. the design using water helical-lobe compressor can simplification of flowsheet, reduce production cost, particularly in production should
Equipment is controllable, and control can be adjusted according to actually oxygen demand processed, and can combine existing technology of Internet of things and carry out remote control control
System, can effectively suitable for small-sized oxygen generation system, compared with existing oil screw air compressor, oil free screw air compressor machine etc.,
Have many advantages, such as that low energy consumption, long lifespan, be especially suitable for small-sized the manufacture of oxygen enterprise and use.
Description of the drawings
Fig. 1 is existing making oxygen schematic diagram；
Fig. 2 is the primary structure schematic diagram of this system；
Fig. 3 is the method for producing oxygen through schematic diagram of the present invention；
In figure：1. rectifying column;2. low-temperature receiver import;3. air inlet.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples, referring to Fig. 1 to Fig. 3：
Embodiment 1：A kind of preparation method of pure oxygen, it includes compression, cooling, the steam separation carried out successively, dry step.
It is in place of the design of this method：Above-mentioned compression compresses air using water helical-lobe compressor, and existing
Oily screw air compressor, oil free screw air compressor machine etc. compare, have many advantages, such as that low energy consumption, long lifespan, be especially suitable for small-sized oxygen processed
Enterprise uses.
Further, it is directly entered in rectifying column top by the dried gas A of the above method, meanwhile, by low temperature
Liquid pure oxygen or liquid purity nitrogen are sent directly into rectifying column, by liquid pure oxygen or liquid purity nitrogen to entering the gas in rectifying column
A cools down, make gas A temperature reach oxygen boiling point/boiling point hereinafter, the method can abandoning tradition compression-expansion link, from
And realize the purpose of quick rectifying.
Embodiment 2, a kind of preparation system of pure oxygen, referring to Fig. 2；Using method as described in Example 1, it includes this system
Rectifying column 1, rectifying column 1 are equipped with the air inlet 3 being sent into dried gas in rectifying column, the dried gas of the above method
It is directly entered in rectifying column by this air inlet, meanwhile, the rectifying column is equipped with provides source with liquid pure oxygen or liquid purity nitrogen
The low-temperature receiver import 2 of connection, low-temperature receiver import provide source with external liquid pure oxygen or liquid purity nitrogen and connect, and liquid pure oxygen or liquid are pure
Nitrogen provides source and is entered in rectifying column to cooling down into the gas A in rectifying column by this low-temperature receiver import 2.
Further, this system it further include water helical-lobe compressor, it is corresponding with water helical-lobe compressor gas outlet connection it is cold
But device, the steam trap being connect with cooling device gas outlet, the drying device that is connect with steam trap gas outlet, it is described dry
Air inlet connection on the gas outlet and rectifying column of dry device；It is described herein to be, cooler, steam separation in this system
Device, drying device using commonly used equipment in the prior art, and cooler, steam trap, drying device for the design it
Place, the present embodiment no longer illustrate the concrete structure of its cooler, steam trap, drying device.
Further, the pipeline connected between the low-temperature receiver import and liquid pure oxygen or liquid purity nitrogen offer source is equipped with section
Expansion valve is flowed, the temperature entered in rectifying column can be made further to reduce by this throttle expansion valve.
The present invention has the following advantages in force：
1st, this system abandons existing turbo-expander, can simplify process, reduce production cost；
2nd, the method for the present invention uses the injection cryogenic energy source directly into rectifying column that can directly reduce temperature in tower, most directly may be used
The temperature for the gas that is distillated is reduced, it is made to reach boiling temperature in a short time hereinafter, realizing rectifying balance, improves rectification efficiency
And quality, reduce operating cost.
3rd, this system without personnel is garrisoned and is checked, it can be achieved that 1 people in force because it has abandoned turbine expansion link in real time
Oxygen operation processed can be completed in operation, can substantially reduce personnel cost, reduce production cost；It, can be real with reference to existing technology of Internet of things
Existing unattended oxygen processed, can substantially reduce cost of labor, and be greatly improved production efficiency, and long-range unattended oxygen processed is become
It may.
4th, the yield of this system in production is 50m3/ h, 0.7 yuan/m of the cost depreciations such as electricity, water3, it is far smaller than existing into
This 1.5-2.0 members/m3Cost.
5th, process is simple in force, is easily achieved for this system, is particluarly suitable for using in small-sized oxygen processed, have huge
Application value.
6th, the design using water helical-lobe compressor can simplification of flowsheet, reduce production cost, particularly in production should
Equipment is controllable, and control can be adjusted according to actually oxygen demand processed, and can combine existing technology of Internet of things and carry out remote control control
System, can effectively suitable for small-sized oxygen generation system, compared with existing oil screw air compressor, oil free screw air compressor machine etc.,
Have many advantages, such as that low energy consumption, long lifespan, be especially suitable for small-sized the manufacture of oxygen enterprise and use.
What the embodiment of the present invention was announced is preferred embodiment, and however, it is not limited to this, the ordinary skill people of this field
Member easily according to above-described embodiment, understands the spirit of the present invention, and makes different amplification and variation, but as long as not departing from this
The spirit of invention, all within the scope of the present invention.
Claims (5)
1. a kind of preparation method of pure oxygen, it includes compression, cooling, the steam separation carried out successively, dry step；Its feature
It is：In dried gas A is directly entered at the top of rectifying column, meanwhile, the liquid pure oxygen of low temperature or liquid purity nitrogen are directly sent
Enter in rectifying column, cooled down by liquid pure oxygen or liquid purity nitrogen to entering the gas A in rectifying column, make the temperature of gas A
Reach below boiling point/boiling point of oxygen.
2. method for producing oxygen through as described in claim 1, it is characterised in that：The compression carries out air using water helical-lobe compressor
Compression.
3. a kind of oxygen generation system, this system uses method as described in claim 1, it includes rectifying column, and rectifying column is equipped with will
Dried gas is sent into the air inlet in rectifying column, which is characterized in that the rectifying column is equipped with and liquid pure oxygen or liquid
Purity nitrogen provides the low-temperature receiver import of source connection, and low-temperature receiver import provides source with external liquid pure oxygen or liquid purity nitrogen and connect.
4. oxygen generation system as claimed in claim 3, it is characterised in that：It further includes water helical-lobe compressor and water screw compression
Machine gas outlet corresponds to the cooler, the steam trap being connect with cooling device gas outlet and steam trap gas outlet of connection
The drying device of connection, the air inlet connection on the gas outlet and rectifying column of the drying device.
5. oxygen generation system as claimed in claim 3, it is characterised in that：The low-temperature receiver import is carried with liquid pure oxygen or liquid purity nitrogen
The pipeline connected between supply source is equipped with throttle expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074703.7A CN108168210A (en) | 2018-01-25 | 2018-01-25 | Method for producing oxygen through and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074703.7A CN108168210A (en) | 2018-01-25 | 2018-01-25 | Method for producing oxygen through and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108168210A true CN108168210A (en) | 2018-06-15 |
Family
ID=62515959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810074703.7A Pending CN108168210A (en) | 2018-01-25 | 2018-01-25 | Method for producing oxygen through and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108168210A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191007305A (en) * | 1909-03-24 | 1910-10-06 | Air Liquide | Improvements relating to the Separation of Oxygen and Nitrogen from the Air. |
| GB191027463A (en) * | 1909-11-29 | 1911-06-01 | Raoul Pierre Pictet | Process for Separating the Oxygen and Nitrogen in Atmospheric Air. |
| CN1760612A (en) * | 2004-10-12 | 2006-04-19 | 气体产品与化学公司 | Process for the cryogenic distillation of air |
| CN107448384A (en) * | 2016-05-31 | 2017-12-08 | 苏州艾柏特精密机械有限公司 | Double-screw compressor rotor preparation method |
-
2018
- 2018-01-25 CN CN201810074703.7A patent/CN108168210A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191007305A (en) * | 1909-03-24 | 1910-10-06 | Air Liquide | Improvements relating to the Separation of Oxygen and Nitrogen from the Air. |
| GB191027463A (en) * | 1909-11-29 | 1911-06-01 | Raoul Pierre Pictet | Process for Separating the Oxygen and Nitrogen in Atmospheric Air. |
| CN1760612A (en) * | 2004-10-12 | 2006-04-19 | 气体产品与化学公司 | Process for the cryogenic distillation of air |
| CN107448384A (en) * | 2016-05-31 | 2017-12-08 | 苏州艾柏特精密机械有限公司 | Double-screw compressor rotor preparation method |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20180615 |