CN106629610A - Device and method for preparing oxygen by vacuum pressure swing adsorption (VPSA) through five towers - Google Patents
Device and method for preparing oxygen by vacuum pressure swing adsorption (VPSA) through five towers Download PDFInfo
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- CN106629610A CN106629610A CN201611231236.1A CN201611231236A CN106629610A CN 106629610 A CN106629610 A CN 106629610A CN 201611231236 A CN201611231236 A CN 201611231236A CN 106629610 A CN106629610 A CN 106629610A
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- adsorption tower
- oxygen
- adsorption
- proceeds
- vacuum desorption
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 513
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 304
- 239000001301 oxygen Substances 0.000 title claims abstract description 302
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 302
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003463 adsorbent Substances 0.000 claims abstract description 52
- 238000003795 desorption Methods 0.000 claims description 127
- 238000010521 absorption reaction Methods 0.000 claims description 95
- 239000007789 gas Substances 0.000 claims description 65
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 42
- 229910001882 dioxygen Inorganic materials 0.000 claims description 42
- 238000004140 cleaning Methods 0.000 claims description 23
- 239000002808 molecular sieve Substances 0.000 claims description 14
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 5
- 239000010457 zeolite Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- SMBQBQBNOXIFSF-UHFFFAOYSA-N dilithium Chemical compound [Li][Li] SMBQBQBNOXIFSF-UHFFFAOYSA-N 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract 1
- 230000009102 absorption Effects 0.000 description 68
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- -1 2 air blasts Chemical compound 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
- C01B2210/0014—Physical processing by adsorption in solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0028—Separation of the specific gas from gas mixtures containing a minor amount of this specific gas
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0046—Nitrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0051—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0062—Water
Abstract
The invention discloses a device and a method for preparing oxygen by vacuum pressure swing adsorption (VPSA) through five towers. The device comprises two blowers, two vacuum pumps, five adsorption towers, two equalizer tanks and an oxygen buffer tank, wherein the inlets of the five adsorption towers are connected together, and are connected to the two blowers and the two vacuum pumps; the outlets of the five adsorption towers are connected together, and are connected to the oxygen buffer tank; the five adsorption towers are connected with the two equalizer tanks respectively through pipelines. By adopting the technical scheme of the invention, the oxygen yield can be increased, and the defects of low oxygen utilization ratio, low adsorbent utilization ratio and high equipment manufacturing cost in the conventional vacuum pressure swing adsorption oxygen production process are overcome.
Description
Technical field
The present invention relates to the use of the technical field that pressure swing adsorption method prepares oxygen, more particularly to a kind of five towers low pressure adsorbent is true
The apparatus and method that empty desorption prepares oxygen.
Background technology
Low pressure adsorbent vacuum desorption oxygenerating technology be it is a kind of it is new oxygen-enriched technology is produced from air, low pressure adsorbent is true
Sky desorption（VACUUM PRESSURE SWING ADSORPTION, abbreviation VPSA）, it is the physics mistake of an approximate isothermal change
Journey, it is to utilize different component adsorption capacity on the sorbent in gas medium different and the gas separation of generation, adsorbent
Selective absorption is carried out in pressure rise, when reduced pressure is to negative pressure desorption and regeneration is obtained.
Pressure swing adsorption method is to utilize the adsorbent with certain characteristic under pressure, to oxygen and nitrogen in air
Gas is separated, and the GAS ABSORPTIONs such as the water and carbon dioxide in air are got up using adsorbents such as aluminum oxide, and oxygen is being carried
It is enriched with the molecular sieve of porous, then nitrogen is absorbed by molecular sieve, further realizes the separation of mixed gas.
Low pressure adsorbent vacuum desorption molecular sieve oxygen generation equipment be with electric power as power, air as raw material, using zeolite molecules
Sieve increases the adsorption capacity of nitrogen in the case where barotropic state is added, the characteristic reduced to the adsorption capacity of nitrogen during negative pressure, by two
Adsorption tower switching is acted on, and forms malleation absorption, the cyclic process of negative pressure desorption, realizes the separation of oxygen in air, nitrogen, is continuously produced
Required tonnage oxygen.
The oxygen preparation of low pressure adsorbent vacuum desorption oxygen generating plant is physical adsorption process, without chemical reaction, to environment not
Pollute, be a kind of preferable offering oxygen way.Whole oxygen preparation relative to traditional deep cooling mode, with structure
Simply, technological process is simple, start rapid, Room-temperature low-pressure operation using easy to operate, equipment, safe and reliable, energy consumption is little, oxygen processed
The low series of advantages of cost.
But current VPSA oxygen generating plants are suffered from the drawback that：As pressure oscillation is big, high equipment cost, product oxygen concentration
Low, oxygen yield is low, can not continuously produce oxygen.
The content of the invention
The embodiment of the present invention is expected to provide the apparatus and method that a kind of five towers low pressure adsorbent vacuum desorption prepares oxygen, can
Oxygen output and yield are improved, and realizes continuous product oxygen.
What the technical scheme of the embodiment of the present invention was realized in：
A kind of five towers low pressure adsorbent vacuum desorption prepares the device of oxygen, including 2 air blasts, 2 vavuum pumps, 5 adsorption towers,
2 equalizer tanks and oxygen surge tank, wherein the import of 5 adsorption towers is connected, and are connected to 2 air blasts and 2 vavuum pumps, and 5
The outlet of individual adsorption tower is connected, and is connected to oxygen surge tank, and 5 adsorption towers are all connected respectively by pipeline with 2 equalizer tanks,
Wherein,
2 air blasts are input into 5 adsorption towers after being used to compress raw air by pipeline；
2 vavuum pumps are used to extract the gas in 5 adsorption towers；
5 adsorption towers be used for absorption produce oxygen, forward bleed off pressure, vacuum desorption, cleaning and pressurising, export oxygen rich gas and press to first
Tank, output Poor oxygen gas to the second equalizer tank, output oxygen is to oxygen surge tank；
First equalizer tank carries out pressurising for storing the oxygen rich gas from 5 adsorption towers inputs, and exporting to 5 adsorption towers；
Second equalizer tank carries out pressurising for storing the Poor oxygen gas from 5 adsorption towers inputs, and exporting to 5 adsorption towers；
Oxygen surge tank is cleaned for collecting the oxygen from 5 adsorption towers inputs, and exporting to 5 adsorption towers.
Preferably, also including 41 valves.
Preferably, 41 valves are pneumatic switching valves.
Preferably, also including 5 check-valves, one end of 5 check-valves is respectively communicated with 5 adsorption towers, other end connection oxygen
Gas surge tank.
Preferably, also including programmable logic controller (PLC), programmable logic controller (PLC) is used to export electric signal control valve.
Embodiments of the invention additionally provide a kind of method that five towers low pressure adsorbent vacuum desorption prepares oxygen, including following
Step：
Raw air respectively enters the first adsorption tower and the 3rd adsorption tower, the first adsorption tower and the 3rd absorption through 2 air blasts
Tower is adsorbed, and is obtained oxygen and is conveyed to oxygen surge tank, and the second adsorption tower is vacuumized with stage vavuum pump, carries out Vacuum solutions
Inhale, the 4th adsorption tower obtains oxygen and cleaned from oxygen surge tank, the 5th adsorption tower adsorbent saturation, air blast stops, the
Five adsorption towers are by oxygen rich gas therein along putting to the first equalizer tank；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower proceeds cleaning, and the 5th adsorption tower is by Poor oxygen gas therein along putting to the second equalizer tank；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower obtains Poor oxygen gas and carries out pressurising from the second equalizer tank, and using air pressurising, vavuum pump is taken out very to the 5th adsorption tower
Sky, carries out vacuum desorption；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower obtains oxygen rich gas and carries out pressurising from the first equalizer tank, and using air pressurising, true 5th adsorption tower proceeds very
Sky desorption；
First adsorption tower continues to adsorb product oxygen, obtains oxygen from oxygen surge tank with the adsorption tower of stage second and is cleaned, and the 3rd
Adsorption tower adsorbent saturation, air blast stops, and the 3rd adsorption tower is by oxygen rich gas therein along putting to the first equalizer tank, and raw material is empty
Gas enters the 4th adsorption tower through air blast, and the 4th adsorption tower is adsorbed, and obtains oxygen and is conveyed to oxygen surge tank, and the 5th inhales
Attached tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and with the adsorption tower of stage second cleaning is proceeded, and the 3rd adsorption tower will be therein lean
Along putting to the second equalizer tank, the 4th adsorption tower proceeds absorption and produces oxygen carrier of oxygen, and the 5th adsorption tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and obtaining Poor oxygen gas from the second equalizer tank with the adsorption tower of stage second carries out pressurising,
And using air pressurising, vavuum pump is vacuumized to the 3rd adsorption tower, vacuum desorption is carried out, the 4th adsorption tower proceeds absorption and produces
Oxygen, the 5th adsorption tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and obtaining oxygen rich gas from the first equalizer tank with the adsorption tower of stage second carries out pressurising,
And using air pressurising, the 3rd adsorption tower proceeds vacuum desorption, the 4th adsorption tower proceeds absorption and produces oxygen, the 5th absorption
Tower proceeds vacuum desorption；
First adsorption tower adsorbent saturation, air blast stops, and the first adsorption tower presses oxygen rich gas therein along putting to first
Tank, the second adsorption tower is respectively enterd with stage raw air through air blast, and the second adsorption tower is adsorbed, and obtains oxygen conveying
Oxygen supply gas surge tank, the 3rd adsorption tower proceeds vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, the 5th adsorption tower
Oxygen is obtained from oxygen surge tank to be cleaned；
Poor oxygen gas therein along putting to the second equalizer tank, are proceeded absorption and are produced by the first adsorption tower with the adsorption tower of stage second
Oxygen, the 3rd adsorption tower proceeds vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower proceeds clearly
Wash；
Vavuum pump is vacuumized to the first adsorption tower, carries out vacuum desorption, is proceeded absorption with the adsorption tower of stage second and is produced oxygen, the
Three adsorption towers proceed vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower is obtained from the second equalizer tank
Obtaining Poor oxygen gas carries out pressurising, and using air pressurising；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower after
Continuous to carry out vacuum desorption, the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower obtains oxygen rich gas from the first equalizer tank
Pressurising is carried out, and using air pressurising；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
Oxygen surge tank obtains oxygen and is cleaned, the 4th adsorption tower adsorbent saturation, and air blast stops, and the 4th adsorption tower will be therein
Along putting to the first equalizer tank, raw air enters the 5th adsorption tower to oxygen rich gas through air blast, and the 5th adsorption tower is adsorbed,
Obtain oxygen and be conveyed to oxygen surge tank；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower after
Continuous to be cleaned, by Poor oxygen gas therein along putting to the second equalizer tank, the 5th adsorption tower proceeds absorption to the 4th adsorption tower
Produce oxygen；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
Second equalizer tank obtains Poor oxygen gas and carries out pressurising, and using air pressurising, vavuum pump is vacuumized to the 4th adsorption tower, carries out true
Sky desorption, the 5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
First equalizer tank obtains oxygen rich gas and carries out pressurising, and using air pressurising, the 4th adsorption tower proceeds vacuum desorption, and the 5th
Adsorption tower proceeds absorption and produces oxygen；
First adsorption tower obtains oxygen and is cleaned from oxygen surge tank, with stage the second adsorption tower adsorbent saturation, air blast
Stop, the second adsorption tower by oxygen rich gas therein along putting to the first equalizer tank, through air blast into the 3rd inhale by raw air
Attached tower, the 3rd adsorption tower is adsorbed, and is obtained oxygen and is conveyed to oxygen surge tank, and the 4th adsorption tower proceeds vacuum desorption,
5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower proceeds cleaning, with the adsorption tower of stage second by Poor oxygen gas therein along putting to the second equalizer tank,
3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds vacuum desorption, and the 5th adsorption tower proceeds absorption
Produce oxygen；
First adsorption tower obtains Poor oxygen gas and carries out pressurising from the second equalizer tank, and using air pressurising, with stage vavuum pump pair
Second adsorption tower is vacuumized, and carries out vacuum desorption, and the 3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds very
Sky desorption, the 5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower obtains oxygen rich gas and carries out pressurising from the first equalizer tank, and using air pressurising, adsorbs with the stage second
Tower proceeds vacuum desorption, and the 3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds vacuum desorption, and the 5th
Adsorption tower proceeds absorption and produces oxygen.
Preferably, the first adsorption tower, the second adsorption tower, the 3rd adsorption tower, the 4th adsorption tower and the 5th adsorption tower are inhaled
When attached, air pressure range is 40 kPas to 50 kPas；First adsorption tower, the second adsorption tower, the 3rd adsorption tower, the 4th adsorption tower and
Five adsorption towers are completed along when putting, and air pressure range is 20 kPas to 25 kPas；First adsorption tower, the second adsorption tower, the 3rd adsorption tower,
When 4th adsorption tower and the 5th adsorption tower carry out vacuum desorption, air pressure range is -40 kPas to -50 kPas；First adsorption tower,
When two adsorption towers, the 3rd adsorption tower, the 4th adsorption tower and the 5th adsorption tower complete pressurising, air pressure range is 0 kPa to 10 kPas.
Preferably, the oxygen concentration of oxygen rich gas is 80% to 90%, and the oxygen concentration of Poor oxygen gas is 60% to 70%.
Preferably, the suction in the first adsorption tower, the second adsorption tower, the 3rd adsorption tower, the 4th adsorption tower and the 5th adsorption tower
Attached dose is alundum (Al2O3), 13X molecular sieves, lithium dimer sieve and/or zeolite molecular sieve.
The apparatus and method that the five tower low pressure adsorbent vacuum desorptions that the embodiment of the present invention is provided prepare oxygen, can divide from air
It is 80%～93% from purity（Percent by volume）Oxygen, oxygen yield can reach 70%～80%.Solve original VPSA oxygen
Technical oxygen utilization rate is low, specific yield adsorbent amount is big（Adsorbent utilization rate is low）, equipment manufacturing cost height etc. affect VPSA skills
The shortcoming of art application.
Description of the drawings
Fig. 1 is the structural representation of the device that five towers low pressure adsorbent vacuum desorption provided in an embodiment of the present invention prepares oxygen
Figure.
Specific embodiment
In order to be illustrated more clearly that the embodiment of the present invention and technical scheme, below in conjunction with drawings and Examples to the present invention
Technical scheme be described in detail, it is clear that described embodiment is a part of embodiment of the present invention, rather than entirely
Portion's embodiment.Based on embodiments of the invention, those of ordinary skill in the art are obtained on the premise of not paying creative work
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
The technical scheme is that a kind of five towers VPSA of design prepares the device of oxygen, including 4 adsorption towers, 2 drums
4 adsorption tower combinations are carried out pressure-variable adsorption, in a week by blower fan, 2 vavuum pumps, 2 equalizer tanks and 1 oxygen surge tank
In phase, each adsorption tower experience absorption produce oxygen, forward bleed off pressure, vacuum desorption, cleaning, five steps such as pressurising, and successively
One adsorption step of difference, has two to carry out adsorption step in five adsorption towers, has two to carry out vacuum desorption step.Such as without spy
Do not mentionlet alone it is bright, in the embodiment of the present invention pressure used all be gauge pressure commonly used in the art.
Fig. 1 is the structural representation of the device that five towers low pressure adsorbent vacuum desorption provided in an embodiment of the present invention prepares oxygen
Figure.As shown in figure 1, the device that the five towers low pressure adsorbent vacuum desorption prepares oxygen includes the first air blast G1, the second air blast
G2, the first vavuum pump Z1, the second vavuum pump Z2, the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th adsorption tower D,
5th adsorption tower E, the first equalizer tank V1, the second equalizer tank V2, oxygen surge tank V3,5 check-valves J1, J2, J3, J4 and J5,
And 41 valves A1-A6, B1-B6, C1-C6, D1-D6, E1-E6, H1-H5, K1-K6.Wherein this 41 valves A1-A6, B1-
B6, C1-C6, D1-D6, E1-E6, H1-H5, K1-K6 are pneumatic switching valves.
First adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the import phase of the 4th adsorption tower D and the 5th adsorption tower E
Connect, and be connected to the first air blast G1, the second air blast G2, the first vavuum pump Z1 and the second vavuum pump Z2, the first adsorption tower A,
Second adsorption tower B, the 3rd adsorption tower C, the outlet of the 4th adsorption tower D and the 5th adsorption tower E are connected, and are connected to oxygen surge tank
V3, the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th adsorption tower D and the 5th adsorption tower E pass through pipeline and first
Equalizer tank V1 and the second equalizer tank V2 connects.
First air blast G1 and the second air blast G2 raw air is compressed after by pipeline be input into the first adsorption tower A, the
Two adsorption tower B, the 3rd adsorption tower C, the 4th adsorption tower D and the 5th adsorption tower E.
First vavuum pump Z1 and the second vavuum pump Z2 can extract the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower
Gas in C, the 4th adsorption tower D and the 5th adsorption tower E.
First adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th adsorption tower D and the 5th adsorption tower E are respectively completed
Absorption produce oxygen, forward bleed off pressure, vacuum desorption, cleaning and pressurising, output oxygen rich gas to the first equalizer tank V1, output Poor oxygen gas
To the second equalizer tank V2, output oxygen to oxygen surge tank V3.
First equalizer tank V1 storages are from the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th adsorption tower D and the
The oxygen rich gas of five adsorption tower E inputs, and export to the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th absorption
Tower D and the 5th adsorption tower E carry out pressurising.
Second equalizer tank V2 storages are from the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th adsorption tower D and the
The Poor oxygen gas of five adsorption tower E inputs, and export to the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th absorption
Tower D and the 5th adsorption tower E carry out pressurising.
Oxygen surge tank V3 is collected from the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th adsorption tower D and the
Five adsorption tower E input oxygen, and export to the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C, the 4th adsorption tower D and
5th adsorption tower E is cleaned.
Check-valves J1, J2, J3, J4 and J5 one end be respectively communicated with the first adsorption tower A, the second adsorption tower B, the 3rd adsorption tower C,
4th adsorption tower D and the 5th adsorption tower E, other end connection oxygen surge tank V3.
Also include programmable logic controller (PLC)（PLC）, programmable logic controller (PLC) can export electric signal and control each valve
Door A1-A6, B1-B6, C1-C6, D1-D6, E1-E6, H1-H5, K1-K6.The switching of each step of five adsorption towers is by sequencing valve
Door open or close to realize, by the program for designing be input into PLC, PLC output electric signal control program-controlled valve, make program-controlled valve
Open or close, realize the switching of each step.
Five adsorption towers all experience absorption produce oxygen, forward bleed off pressure, vacuum desorption, cleaning, five steps such as pressurising.
Oxygen step is produced in absorption：Raw air enters air blast Jing after blower inlet filter removes mechanical admixture,
After compressing in air blast, absorption tower bottom is entered by pipeline and pneumatic switch valve, make adsorption tower supercharging be 40 kPas to 50
KPa, the adsorbent absorption of moisture and the adsorbed tower bottom of carbon dioxide, raw air nitrogen during rising in adsorption tower
Gas is adsorbed, and oxygen is enriched with the gas phase, and discharges from the top of adsorption tower, realizes the separation of mixed gas, effectively carries
Oxygen gas component is taken.
Adsorbent in adsorption tower includes alundum (Al2O3), 13X molecular sieves, lithium dimer sieve, zeolite molecular sieve etc., preferential choosing
Use zeolite molecular sieve.
Forward bleeding off pressure step is：It is divided into two stages, when the close saturation of adsorbent absorption nitrogen, air blast stops to suction
Attached tower enters air, then adsorption tower stops producing oxygen, deflates from the port of export, and oxygen rich gas is suitable to be put to the first equalizer tank V1, Poor oxygen gas
Along putting to the second equalizer tank V2, absorption tower pressure interior force is set to be down to 20 kPas to 20 kPas.The oxygen concentration of wherein oxygen rich gas is
80% to 90%, the oxygen concentration of Poor oxygen gas is 60% to 70%.
Vacuum desorption step is：By the switching of valve, air blast by evacuated pressure in adsorption tower to -40 kPas to -
50 kPas, make adsorbent water, carbon dioxide, nitrogen desorption, the molecular sieve in regenerative adsorption tower.
Cleaning step is：When it is -40 kPas to -50 kPas to adsorb tower pressure interior force, cleaning step is started simultaneously at, using oxygen
Product gas in gas surge tank are carried out inversely to adsorption tower（From the port of export air inlet of adsorption tower, flow out from entrance point）Purging,
The adsorbent of cleaning and regeneration, carries out vacuum desorption while cleaning, tower pressure interior force is adsorbed during cleaning and is held essentially constant.
Pressurising step is：Because the pressure in adsorption tower is relatively low, it is not enough to allow air blast to be pressurized, prevents from causing molecule
The efflorescence of sieve.Pressurising is divided into two stages, and start the second equalizer tank V2 and air carries out pressurising to adsorption tower simultaneously, by lean oxygen
Body is charged to absorption tower bottom, and then the first equalizer tank V1 carries out pressurising to adsorption tower, and this part oxygen rich gas is recycled again.
Pressure in adsorption tower can be reached into the pressure that air blast is adsorbed.Namely after cleaning step terminates, using equalizer tank
Interior pressure and atmospheric pressure boosts to adsorption tower, makes pressure rise to 0 kPa to 10 kPas.
After the completion of pressurising step, the circulation in next pressure-variable adsorption cycle is initially entered.It is characterized in carrying out cleaning step
When rapid, still vacuumized, the pressure in adsorption tower is basically unchanged.
Five tower low pressure adsorbent vacuum desorptions in being detailed below using above-described embodiment prepare oxygen unit to prepare
The process of oxygen.The five towers low pressure adsorbent vacuum desorption（VPSA）The flow process for preparing oxygen is comprised the following steps：
Raw air respectively enters the first adsorption tower and the 3rd adsorption tower, the first adsorption tower and the 3rd absorption through 2 air blasts
Tower is adsorbed, and is obtained oxygen and is conveyed to oxygen surge tank, and the second adsorption tower is vacuumized with stage vavuum pump, carries out Vacuum solutions
Inhale, the 4th adsorption tower obtains oxygen and cleaned from oxygen surge tank, the 5th adsorption tower adsorbent saturation, air blast stops, the
Five adsorption towers are by oxygen rich gas therein along putting to the first equalizer tank；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower proceeds cleaning, and the 5th adsorption tower is by Poor oxygen gas therein along putting to the second equalizer tank；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower obtains Poor oxygen gas and carries out pressurising from the second equalizer tank, and using air pressurising, vavuum pump is taken out very to the 5th adsorption tower
Sky, carries out vacuum desorption；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower obtains oxygen rich gas and carries out pressurising from the first equalizer tank, and using air pressurising, true 5th adsorption tower proceeds very
Sky desorption；
First adsorption tower continues to adsorb product oxygen, obtains oxygen from oxygen surge tank with the adsorption tower of stage second and is cleaned, and the 3rd
Adsorption tower adsorbent saturation, air blast stops, and the 3rd adsorption tower is by oxygen rich gas therein along putting to the first equalizer tank, and raw material is empty
Gas enters the 4th adsorption tower through air blast, and the 4th adsorption tower is adsorbed, and obtains oxygen and is conveyed to oxygen surge tank, and the 5th inhales
Attached tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and with the adsorption tower of stage second cleaning is proceeded, and the 3rd adsorption tower will be therein lean
Along putting to the second equalizer tank, the 4th adsorption tower proceeds absorption and produces oxygen carrier of oxygen, and the 5th adsorption tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and obtaining Poor oxygen gas from the second equalizer tank with the adsorption tower of stage second carries out pressurising,
And using air pressurising, vavuum pump is vacuumized to the 3rd adsorption tower, vacuum desorption is carried out, the 4th adsorption tower proceeds absorption and produces
Oxygen, the 5th adsorption tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and obtaining oxygen rich gas from the first equalizer tank with the adsorption tower of stage second carries out pressurising,
And using air pressurising, the 3rd adsorption tower proceeds vacuum desorption, the 4th adsorption tower proceeds absorption and produces oxygen, the 5th absorption
Tower proceeds vacuum desorption；
First adsorption tower adsorbent saturation, air blast stops, and the first adsorption tower presses oxygen rich gas therein along putting to first
Tank, the second adsorption tower is respectively enterd with stage raw air through air blast, and the second adsorption tower is adsorbed, and obtains oxygen conveying
Oxygen supply gas surge tank, the 3rd adsorption tower proceeds vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, the 5th adsorption tower
Oxygen is obtained from oxygen surge tank to be cleaned；
Poor oxygen gas therein along putting to the second equalizer tank, are proceeded absorption and are produced by the first adsorption tower with the adsorption tower of stage second
Oxygen, the 3rd adsorption tower proceeds vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower proceeds clearly
Wash；
Vavuum pump is vacuumized to the first adsorption tower, carries out vacuum desorption, is proceeded absorption with the adsorption tower of stage second and is produced oxygen, the
Three adsorption towers proceed vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower is obtained from the second equalizer tank
Obtaining Poor oxygen gas carries out pressurising, and using air pressurising；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower after
Continuous to carry out vacuum desorption, the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower obtains oxygen rich gas from the first equalizer tank
Pressurising is carried out, and using air pressurising；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
Oxygen surge tank obtains oxygen and is cleaned, the 4th adsorption tower adsorbent saturation, and air blast stops, and the 4th adsorption tower will be therein
Along putting to the first equalizer tank, raw air enters the 5th adsorption tower to oxygen rich gas through air blast, and the 5th adsorption tower is adsorbed,
Obtain oxygen and be conveyed to oxygen surge tank；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower after
Continuous to be cleaned, by Poor oxygen gas therein along putting to the second equalizer tank, the 5th adsorption tower proceeds absorption to the 4th adsorption tower
Produce oxygen；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
Second equalizer tank obtains Poor oxygen gas and carries out pressurising, and using air pressurising, vavuum pump is vacuumized to the 4th adsorption tower, carries out true
Sky desorption, the 5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
First equalizer tank obtains oxygen rich gas and carries out pressurising, and using air pressurising, the 4th adsorption tower proceeds vacuum desorption, and the 5th
Adsorption tower proceeds absorption and produces oxygen；
First adsorption tower obtains oxygen and is cleaned from oxygen surge tank, with stage the second adsorption tower adsorbent saturation, air blast
Stop, the second adsorption tower by oxygen rich gas therein along putting to the first equalizer tank, through air blast into the 3rd inhale by raw air
Attached tower, the 3rd adsorption tower is adsorbed, and is obtained oxygen and is conveyed to oxygen surge tank, and the 4th adsorption tower proceeds vacuum desorption,
5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower proceeds cleaning, with the adsorption tower of stage second by Poor oxygen gas therein along putting to the second equalizer tank,
3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds vacuum desorption, and the 5th adsorption tower proceeds absorption
Produce oxygen；
First adsorption tower obtains Poor oxygen gas and carries out pressurising from the second equalizer tank, and using air pressurising, with stage vavuum pump pair
Second adsorption tower is vacuumized, and carries out vacuum desorption, and the 3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds very
Sky desorption, the 5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower obtains oxygen rich gas and carries out pressurising from the first equalizer tank, and using air pressurising, adsorbs with the stage second
Tower proceeds vacuum desorption, and the 3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds vacuum desorption, and the 5th
Adsorption tower proceeds absorption and produces oxygen.
Repeat above step, periodically switch, enable a device to steadily produce oxygen.Prepared qualified products oxygen, then Jing oxygen
After compressor compresses, it is sent to by the oxygen pressure for meeting user's requirement and uses gas point.
In above-mentioned flow process, in wash phase, cleaned using the product oxygen in oxygen surge tank, oxygen concentration is high, clearly
Wash effect good.At the pressurising stage, the Poor oxygen gas in the second equalizer tank V2 are used to first pressurising, allow Poor oxygen gas in absorption
Tower bottom is adsorbed again；And then the oxygen rich gas in the first equalizer tank V1 carries out again pressurising, reclaims this part oxygen rich air
Body.Before air blast pressurising, the suitable deflation body collected using equalizer tank is carried and adsorption tower is boosted, and can be reduced to molecular sieve
Impulsive force, extend molecular sieve service life, improve oxygen yield.Independence is stronger between each adsorption tower, lean oxygen
Body is collected by equalizer tank, for adsorption tower cleaning and pressurising.Reverse pressurising is that the gas collected by equalizer tank and air pressurising are total to
With what is completed, the impulsive force to molecular sieve is reduced, it is cost-effective, improve oxygen yield.With the gas pair of two kinds of different purities
Adsorption tower is purged.Oxygen concentration is improved, purity fluctuation is eliminated.Cleaning and pressurising step can effectively reduce remaining in dead volume
Air, improves product recovery rate, preserves mechanical energy, the reducing energy consumption being contained in adsorption tower in gas.Carrying out above-mentioned steps
When, need two adsorption towers to be adsorbed, two adsorption towers carry out vacuum desorption step, and two air blasts adsorb respectively to two
Tower is adsorbed, and two vavuum pumps carry out respectively the operation such as vacuum desorption to two adsorption towers.
Above-mentioned five towers low pressure adsorbent vacuum desorption is prepared in oxygen unit, and five adsorption towers are separate, using equalizer tank
Collect Poor oxygen gas to be cleaned, simultaneously pressurising is carried out to adsorption tower using equalizer tank and air, with traditional VPSA oxygen dress
Put and compare, maximum feature is to arrange two equalizer tanks, and the gas for forward bleeding off pressure is collected and is distinguished, and improves oxygen utilization
Rate, the device oxygen concentration can reach 80%～93%, and oxygen yield 70% ~ 80%, the oxygen production rate for realizing 10% ~ 20% is improved.
The above, only presently preferred embodiments of the present invention is not intended to limit protection scope of the present invention.
Claims (9)
1. a kind of five towers low pressure adsorbent vacuum desorption prepares the device of oxygen, it is characterised in that including 2 air blasts, 2 vacuum
Pump, 5 adsorption towers, 2 equalizer tanks and oxygen surge tanks, wherein the import of 5 adsorption towers is connected, and are connected to 2 air blasts
With 2 vavuum pumps, the outlet of 5 adsorption towers is connected, and is connected to oxygen surge tank, and 5 adsorption towers are distinguished all with 2 by pipeline
Individual equalizer tank connection, wherein,
2 air blasts are input into 5 adsorption towers after being used to compress raw air by pipeline；
2 vavuum pumps are used to extract the gas in 5 adsorption towers；
5 adsorption towers be used for absorption produce oxygen, forward bleed off pressure, vacuum desorption, cleaning and pressurising, export oxygen rich gas and press to first
Tank, output Poor oxygen gas to the second equalizer tank, output oxygen is to oxygen surge tank；
First equalizer tank carries out pressurising for storing the oxygen rich gas from 5 adsorption towers inputs, and exporting to 5 adsorption towers；
Second equalizer tank carries out pressurising for storing the Poor oxygen gas from 5 adsorption towers inputs, and exporting to 5 adsorption towers；
Oxygen surge tank is cleaned for collecting the oxygen from 5 adsorption towers inputs, and exporting to 5 adsorption towers.
2. a kind of five towers low pressure adsorbent vacuum desorption according to claim 1 prepares the device of oxygen, it is characterised in that also
Including 41 valves.
3. a kind of five towers low pressure adsorbent vacuum desorption according to claim 2 prepares the device of oxygen, it is characterised in that institute
It is pneumatic switching valve to state 41 valves.
4. a kind of five towers low pressure adsorbent vacuum desorption according to claim 2 prepares the device of oxygen, it is characterised in that also
Including 5 check-valves, one end of 5 check-valves is respectively communicated with 5 adsorption towers, other end connection oxygen surge tank.
5. a kind of five towers low pressure adsorbent vacuum desorption according to claim 4 prepares the device of oxygen, it is characterised in that also
Including programmable logic controller (PLC), programmable logic controller (PLC) is used to export electric signal control valve.
6. a kind of method that five towers low pressure adsorbent vacuum desorption prepares oxygen, it is characterised in that comprise the following steps：
Raw air respectively enters the first adsorption tower and the 3rd adsorption tower, the first adsorption tower and the 3rd absorption through 2 air blasts
Tower is adsorbed, and is obtained oxygen and is conveyed to oxygen surge tank, and the second adsorption tower is vacuumized with stage vavuum pump, carries out Vacuum solutions
Inhale, the 4th adsorption tower obtains oxygen and cleaned from oxygen surge tank, the 5th adsorption tower adsorbent saturation, air blast stops, the
Five adsorption towers are by oxygen rich gas therein along putting to the first equalizer tank；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower proceeds cleaning, and the 5th adsorption tower is by Poor oxygen gas therein along putting to the second equalizer tank；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower obtains Poor oxygen gas and carries out pressurising from the second equalizer tank, and using air pressurising, vavuum pump is taken out very to the 5th adsorption tower
Sky, carries out vacuum desorption；
First adsorption tower and the 3rd adsorption tower continue to adsorb and produce oxygen, and with the adsorption tower of stage second vacuum desorption is proceeded, and the 4th
Adsorption tower obtains oxygen rich gas and carries out pressurising from the first equalizer tank, and using air pressurising, true 5th adsorption tower proceeds very
Sky desorption；
First adsorption tower continues to adsorb product oxygen, obtains oxygen from oxygen surge tank with the adsorption tower of stage second and is cleaned, and the 3rd
Adsorption tower adsorbent saturation, air blast stops, and the 3rd adsorption tower is by oxygen rich gas therein along putting to the first equalizer tank, and raw material is empty
Gas enters the 4th adsorption tower through air blast, and the 4th adsorption tower is adsorbed, and obtains oxygen and is conveyed to oxygen surge tank, and the 5th inhales
Attached tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and with the adsorption tower of stage second cleaning is proceeded, and the 3rd adsorption tower will be therein lean
Along putting to the second equalizer tank, the 4th adsorption tower proceeds absorption and produces oxygen carrier of oxygen, and the 5th adsorption tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and obtaining Poor oxygen gas from the second equalizer tank with the adsorption tower of stage second carries out pressurising,
And using air pressurising, vavuum pump is vacuumized to the 3rd adsorption tower, vacuum desorption is carried out, the 4th adsorption tower proceeds absorption and produces
Oxygen, the 5th adsorption tower proceeds vacuum desorption；
First adsorption tower continues to adsorb product oxygen, and obtaining oxygen rich gas from the first equalizer tank with the adsorption tower of stage second carries out pressurising,
And using air pressurising, the 3rd adsorption tower proceeds vacuum desorption, the 4th adsorption tower proceeds absorption and produces oxygen, the 5th absorption
Tower proceeds vacuum desorption；
First adsorption tower adsorbent saturation, air blast stops, and the first adsorption tower presses oxygen rich gas therein along putting to first
Tank, the second adsorption tower is respectively enterd with stage raw air through air blast, and the second adsorption tower is adsorbed, and obtains oxygen conveying
Oxygen supply gas surge tank, the 3rd adsorption tower proceeds vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, the 5th adsorption tower
Oxygen is obtained from oxygen surge tank to be cleaned；
Poor oxygen gas therein along putting to the second equalizer tank, are proceeded absorption and are produced by the first adsorption tower with the adsorption tower of stage second
Oxygen, the 3rd adsorption tower proceeds vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower proceeds clearly
Wash；
Vavuum pump is vacuumized to the first adsorption tower, carries out vacuum desorption, is proceeded absorption with the adsorption tower of stage second and is produced oxygen, the
Three adsorption towers proceed vacuum desorption, and the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower is obtained from the second equalizer tank
Obtaining Poor oxygen gas carries out pressurising, and using air pressurising；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower after
Continuous to carry out vacuum desorption, the 4th adsorption tower proceeds absorption and produces oxygen, and the 5th adsorption tower obtains oxygen rich gas from the first equalizer tank
Pressurising is carried out, and using air pressurising；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
Oxygen surge tank obtains oxygen and is cleaned, the 4th adsorption tower adsorbent saturation, and air blast stops, and the 4th adsorption tower will be therein
Along putting to the first equalizer tank, raw air enters the 5th adsorption tower to oxygen rich gas through air blast, and the 5th adsorption tower is adsorbed,
Obtain oxygen and be conveyed to oxygen surge tank；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower after
Continuous to be cleaned, by Poor oxygen gas therein along putting to the second equalizer tank, the 5th adsorption tower proceeds absorption to the 4th adsorption tower
Produce oxygen；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
Second equalizer tank obtains Poor oxygen gas and carries out pressurising, and using air pressurising, vavuum pump is vacuumized to the 4th adsorption tower, carries out true
Sky desorption, the 5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower proceeds vacuum desorption, with the adsorption tower of stage second proceed absorption produce oxygen, the 3rd adsorption tower from
First equalizer tank obtains oxygen rich gas and carries out pressurising, and using air pressurising, the 4th adsorption tower proceeds vacuum desorption, and the 5th
Adsorption tower proceeds absorption and produces oxygen；
First adsorption tower obtains oxygen and is cleaned from oxygen surge tank, with stage the second adsorption tower adsorbent saturation, air blast
Stop, the second adsorption tower by oxygen rich gas therein along putting to the first equalizer tank, through air blast into the 3rd inhale by raw air
Attached tower, the 3rd adsorption tower is adsorbed, and is obtained oxygen and is conveyed to oxygen surge tank, and the 4th adsorption tower proceeds vacuum desorption,
5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower proceeds cleaning, with the adsorption tower of stage second by Poor oxygen gas therein along putting to the second equalizer tank,
3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds vacuum desorption, and the 5th adsorption tower proceeds absorption
Produce oxygen；
First adsorption tower obtains Poor oxygen gas and carries out pressurising from the second equalizer tank, and using air pressurising, with stage vavuum pump pair
Second adsorption tower is vacuumized, and carries out vacuum desorption, and the 3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds very
Sky desorption, the 5th adsorption tower proceeds absorption and produces oxygen；
First adsorption tower obtains oxygen rich gas and carries out pressurising from the first equalizer tank, and using air pressurising, adsorbs with the stage second
Tower proceeds vacuum desorption, and the 3rd adsorption tower proceeds absorption and produces oxygen, and the 4th adsorption tower proceeds vacuum desorption, and the 5th
Adsorption tower proceeds absorption and produces oxygen.
7. the method that a kind of five towers low pressure adsorbent vacuum desorption according to claim 6 prepares oxygen, it is characterised in that the
When one adsorption tower, the second adsorption tower, the 3rd adsorption tower, the 4th adsorption tower and the 5th adsorption tower are adsorbed, air pressure range is 40
KPa to 50 kPas；First adsorption tower, the second adsorption tower, the 3rd adsorption tower, the 4th adsorption tower and the 5th adsorption tower complete suitable putting
When, air pressure range is 20 kPas to 25 kPas；First adsorption tower, the second adsorption tower, the 3rd adsorption tower, the 4th adsorption tower and the 5th
When adsorption tower carries out vacuum desorption, air pressure range is -40 kPas to -50 kPas；First adsorption tower, the second adsorption tower, the 3rd inhale
When attached tower, the 4th adsorption tower and the 5th adsorption tower complete pressurising, air pressure range is 0 kPa to 10 kPas.
8. the method that a kind of five towers low pressure adsorbent vacuum desorption according to claim 7 prepares oxygen, it is characterised in that rich
The oxygen concentration of carrier of oxygen is 80% to 90%, and the oxygen concentration of Poor oxygen gas is 60% to 70%.
9. the method that a kind of five towers low pressure adsorbent vacuum desorption according to claim 6 prepares oxygen, it is characterised in that the
Adsorbent in one adsorption tower, the second adsorption tower, the 3rd adsorption tower, the 4th adsorption tower and the 5th adsorption tower be alundum (Al2O3),
13X molecular sieves, lithium dimer sieve and/or zeolite molecular sieve.
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Cited By (1)
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| CN107200307A (en) * | 2017-07-25 | 2017-09-26 | 杨炯良 | A kind of three tower vacuum pressure swing adsorption system for oxygen production and its method for producing oxygen through |
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