CN117244360A - Pressure swing adsorption oxygen and nitrogen making device - Google Patents
Pressure swing adsorption oxygen and nitrogen making device Download PDFInfo
- Publication number
- CN117244360A CN117244360A CN202311303659.XA CN202311303659A CN117244360A CN 117244360 A CN117244360 A CN 117244360A CN 202311303659 A CN202311303659 A CN 202311303659A CN 117244360 A CN117244360 A CN 117244360A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- adsorption
- oxygen
- air
- nitrogen
- 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.)
- Pending
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 129
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 74
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000001301 oxygen Substances 0.000 title claims abstract description 63
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 63
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 16
- 239000002808 molecular sieve Substances 0.000 claims description 8
- 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 8
- 238000004891 communication Methods 0.000 claims description 3
- 230000003584 silencer Effects 0.000 claims description 3
- 230000030279 gene silencing Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 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
- C01B13/0262—Physical processing only by adsorption on solids characterised by the adsorbent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0433—Physical processing only
- C01B21/045—Physical processing only by adsorption in solids
- C01B21/0455—Physical processing only by adsorption in solids characterised by the adsorbent
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The pressure swing adsorption oxygen and nitrogen production device of the invention comprises: the adsorption tower is provided with a first pipeline and a second pipeline which are communicated with the adsorption tower; an inlet of the oxygen buffer tank is communicated with the first pipeline; the air supply device is used for introducing air into the adsorption tower through the air inlet pipeline and the second pipeline in an air inlet period of the adsorption tower; the two ends of the air outlet pipeline are respectively communicated with the second pipeline and the inlet of the vacuumizing device; and the third pipeline and the fourth pipeline are selectively communicated with one of the third pipeline and the fourth pipeline by the vacuumizing device, the third pipeline is used for discharging nitrogen, and the outlet of the fourth pipeline is communicated with the nitrogen buffer tank. Therefore, the pressure swing adsorption oxygen and nitrogen generating device has the advantage of being convenient for oxygen and nitrogen generation.
Description
Technical Field
The invention relates to the technical field of pressure swing adsorption oxygen production, in particular to a pressure swing adsorption oxygen production and nitrogen production device.
Background
In the related technology, the pressure swing adsorption oxygen production (VPSA) device only has oxygen, the principle is that the molecular sieve in the adsorption tower is used for realizing the separation of nitrogen and oxygen by the characteristic of selective adsorption of nitrogen in air, and the separation is divided into two basic operation steps of nitrogen adsorption oxygen production and nitrogen vacuumizing regeneration in each working period, wherein the concentration (volume concentration) of the oxygen in the product is different from 80-95% according to the requirement of a user, and the gas generated in the vacuumizing regeneration process of the adsorption tower is called as dirty nitrogen because of the higher oxygen content, high humidity and lower utilization value. The vast majority of the polluted nitrogen is nitrogen, the concentration (volume concentration) is about 80% -90%, and the polluted nitrogen also comprises other components such as oxygen, argon, water and the like. At present, the part of polluted nitrogen produced by a pressure swing adsorption oxygen production (VPSA) device is completely discharged, the volume quantity is several times of that of the product oxygen, and huge waste is caused.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, embodiments of the present invention provide a pressure swing adsorption oxygen and nitrogen generation apparatus.
The pressure swing adsorption oxygen and nitrogen production device of the embodiment of the invention comprises:
the adsorption tower is provided with a first pipeline and a second pipeline which are communicated with the adsorption tower, a molecular sieve for absorbing nitrogen is arranged in the adsorption tower, and the adsorption tower is provided with an air inlet period and an air exhaust period;
the inlet of the oxygen buffer tank is communicated with the first pipeline, and in the air inlet period of the adsorption tower, oxygen in the adsorption tower is introduced into the oxygen buffer tank through the first pipeline;
the air supply device is communicated with the second pipeline, and in the air inlet period of the adsorption tower, the air supply device is used for introducing air into the adsorption tower through the air inlet pipeline and the second pipeline;
the two ends of the air outlet pipeline are respectively communicated with the inlets of the second pipeline and the vacuumizing device, and the vacuumizing device can pump out the gas in the adsorption tower through the second pipeline and the air outlet pipeline in the exhaust period of the adsorption tower;
and the vacuumizing device is selectively communicated with one of the third pipeline and the fourth pipeline, the third pipeline is used for discharging nitrogen, and an outlet of the fourth pipeline is communicated with the nitrogen buffer tank.
Therefore, the pressure swing adsorption oxygen and nitrogen generating device provided by the embodiment of the invention has the advantage of being convenient for oxygen and nitrogen generation.
In some embodiments, a control valve is provided on each of the first, second, intake, third, and fourth lines.
In some embodiments, the adsorption tower is a plurality of, the first pipelines of the adsorption towers are communicated with the oxygen buffer tank, and the second pipelines of the adsorption towers are communicated with the air outlet pipeline;
the plurality of air inlet pipelines are communicated with the second pipelines on the adsorption towers in a one-to-one correspondence manner.
The pressure swing adsorption oxygen and nitrogen generating device further comprises an air filter and an air supply pipeline, wherein the air filter is arranged at the inlet of the air supply pipeline, the air supply device is arranged on the air supply pipeline, and each air inlet pipeline is communicated with the outlet of the air supply pipeline.
In some embodiments, the air supply pipeline and the air outlet pipeline are both provided with an exhaust pipeline, the air outlet pipeline is provided with a switch valve, and an outlet of the exhaust pipeline is provided with an exhaust silencer.
In some embodiments, the number of the adsorption towers is two, the two first pipelines on the two adsorption towers are communicated through a fifth pipeline, and a control valve is arranged on the fifth pipeline.
In some embodiments, the control valves on the third pipeline and the fourth pipeline are program control valves, the program control valve on the third pipeline is opened in a first preset time of the exhaust period of the adsorption tower, the program control valve on the fourth pipeline is closed, and the program control valve on the third pipeline is closed and the program control valve on the fourth pipeline is opened after the first preset time of the exhaust period of the adsorption tower.
In some embodiments, the first preset time is greater than or equal to 2 seconds and less than or equal to 3 seconds.
In some embodiments, a gas drying device is disposed on the fourth pipeline, and the gas drying device is used for drying the gas introduced into the fourth pipeline.
In some embodiments, the outlet of the third conduit communicates with a sound attenuating tower.
Drawings
Fig. 1 is a schematic view of a pressure swing adsorption oxygen and nitrogen generating apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram of a pressure swing adsorption oxygen and nitrogen generating apparatus according to a second embodiment of the invention.
Reference numerals:
pressure swing adsorption oxygen and nitrogen generation apparatus 100;
an adsorption tower 1, a first pipeline 11, a second pipeline 12 and a fifth pipeline 13;
an oxygen buffer tank 2;
an air intake duct 3, an air blower 31, an air filter 32, and an air blower duct 33;
an air outlet pipeline 4 and a vacuumizing device 41;
a third pipe 5, a muffler tower 51;
a fourth pipeline 6, a nitrogen buffer tank 61 and a gas drying device 62;
a control valve 7;
an exhaust pipe 8, an on-off valve 81, and an exhaust muffler 82.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The pressure swing adsorption oxygen and nitrogen generation apparatus 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings. As shown in fig. 1 and 2, the pressure swing adsorption oxygen and nitrogen generating apparatus 100 according to the embodiment of the present invention includes an adsorption tower 1, an oxygen buffer tank 2, an intake pipe 3, an air supply device 31, an air outlet pipe 4, a vacuum pumping device 41, a third pipe 5, and a fourth pipe 6.
The adsorption tower 1 is provided with a first pipeline 11 and a second pipeline 12 which are communicated with the adsorption tower 1, a molecular sieve for absorbing nitrogen is arranged in the adsorption tower 1, and the adsorption tower 1 has an air inlet period and an air exhaust period. The inlet of the oxygen buffer tank 2 is communicated with the first pipeline 11, and in the air inlet period of the adsorption tower 1, oxygen in the adsorption tower 1 is introduced into the oxygen buffer tank 2 through the first pipeline 11.
The air intake pipe 3 communicates with the second pipe 12, and the air blowing device 31 introduces air into the adsorption tower 1 through the air intake pipe 3 and the second pipe 12 during the air intake cycle of the adsorption tower 1.
Specifically, the intake cycle and the exhaust cycle of each adsorption tower 1 are alternately performed, and in the intake cycle, the air blowing device 31 sequentially passes through the intake pipe 3 and the second pipe 12 to introduce air into the adsorption tower 1. After the air enters the adsorption tower 1, nitrogen in the air can be absorbed by the molecular sieve in the adsorption tower 1, and oxygen in the air is introduced into the oxygen buffer tank 2 through the first pipeline 11 so as to collect the oxygen by using the oxygen buffer tank 2. For example, the blower 31 is a fan.
The two ends of the air outlet pipeline 4 are respectively communicated with the inlets of the second pipeline 12 and the vacuumizing device 41, and the vacuumizing device 41 can suck out the air in the adsorption tower 1 through the second pipeline 12 and the air outlet pipeline 4 in the exhaust period of the adsorption tower 1. Specifically, during the exhaust cycle, the first line 11 is closed and the intake line 3 is closed. The vacuum pumping device 41 pumps out the air in the adsorption tower 1 by using the second pipeline 12 and the air outlet pipeline 4 so that the nitrogen absorbed by the molecular sieve can be pumped out by the vacuum pumping device 41.
The evacuation device 41 is selectively communicated with one of the third pipe 5 and the fourth pipe 6, the third pipe 5 is used for discharging nitrogen, and the outlet of the fourth pipe 6 is communicated with the nitrogen buffer tank 61. Specifically, at the beginning of the exhaust cycle, the evacuation device 41 draws out more moisture and more air (oxygen) in the gas (dirty nitrogen), and at this point the evacuation device 41 chooses to communicate with the third conduit 5 (closes the fourth conduit 6) so that the dirty nitrogen can be exhausted from the third conduit 5. After the vacuum degree in the adsorption tower 1 reaches-10 KPa, the vacuumizing device 41 is selectively communicated with the fourth pipeline 6 (the third pipeline 5 is closed), at the moment, nitrogen in the adsorption tower 1 begins to be greatly resolved from the molecular sieve, and at the moment, the concentration of the extracted nitrogen is high (high quality), so that the high-concentration nitrogen can enter the nitrogen buffer tank 61 through the fourth pipeline 6, and the high-concentration nitrogen is collected by the nitrogen buffer tank 61, so that the waste of the nitrogen is reduced. For example, the evacuation device is a vacuum pump.
Accordingly, the pressure swing adsorption oxygen and nitrogen generation apparatus 100 according to the embodiment of the present invention has an advantage of facilitating oxygen and nitrogen generation.
As shown in fig. 1 and 2, a control valve 7 is provided on each of the first pipe 11, the second pipe 12, the intake pipe 3, the third pipe 5, and the fourth pipe 6. Specifically, the outlet of the intake pipe 3 communicates with a portion of the second pipe 12 between an end of the second pipe 12 adjacent to the adsorption tower 1 and the control valve 7 on the second pipe 12, and during the intake cycle of the adsorption tower 1, the control valve 7 on the first pipe 11 and the control valve 7 on the intake pipe 3 are opened, and the control valve 7 on the second pipe 12 is closed. During the exhaust cycle of the adsorption tower 1, the control valve 7 on the first pipeline 11 and the control valve 7 on the air inlet pipeline 3 are closed, and the control valve 7 on the second pipeline 12 is opened. At the beginning of the exhaust cycle of the adsorption tower 1, the control valve 7 on the third pipeline 5 is opened, and the control valve 7 on the fourth pipeline 6 is closed; after this initial period of the exhaust cycle of the adsorption tower 1, the control valve 7 on the third line 5 is closed, and the control valve 7 on the fourth line 6 is opened.
In some embodiments, the adsorption tower 1 is multiple, the first pipelines 11 of the adsorption towers 1 are all communicated with the oxygen buffer tank 2, and the second pipelines 12 of the adsorption towers 1 are all communicated with the air outlet pipeline 4. The plurality of air inlet pipelines 3 are communicated with the second pipelines 12 on the plurality of adsorption towers 1 in a one-to-one correspondence manner. The adsorption towers 1 are a plurality of to improve the oxygen production efficiency. Each adsorption tower 1 can deliver oxygen into the oxygen buffer tank 2 through a first pipeline 11 matched (communicated) with the adsorption tower, and each adsorption tower 1 is provided with an air inlet pipeline 3 matched (communicated) with the adsorption tower independently. The intake cycle of the plurality of adsorption towers 1 may be alternately performed. For example, the control valves 7 on the first lines 11 of the adsorption towers 1 are alternately opened in sequence.
The pressure swing adsorption oxygen and nitrogen generating apparatus 100 according to the embodiment of the present invention further includes an air filter 32 and an air supply line 33, the air filter 32 is disposed at an inlet of the air supply line 33, the air supply device 31 is disposed on the air supply line 33, and each air intake line 3 is communicated with an outlet of the air supply line 33. Thus, the air filter 32 can filter the air entering the air supply duct 33, and the air can be introduced into the plurality of air intake ducts 3 by the air supply device 31 and the air supply duct 33. The control valves 7 on the plurality of intake lines 3 may be alternately opened in sequence so that the plurality of adsorption towers 1 may alternately enter the intake cycle in sequence.
As shown in fig. 1 and 2, in some embodiments, the air supply line 33 and the air outlet line 4 are provided with an exhaust line 8, the exhaust line 8 is provided with an on-off valve 81, and an outlet of the exhaust line 8 is provided with an exhaust silencer 82. Specifically, when the pressure in the air supply line 33 or the air outlet line 4 exceeds a second preset value, that is, when the pressure in the air exhaust line 8 connected to the air supply line 33 or the air outlet line 4 exceeds the second preset value, the on-off valve 81 on the air exhaust line 8 connected to the air supply line 33 or the air outlet line 4 opens to release air so as to adjust the air pressures in the air supply line 33 and the air outlet line 4, and the air exhaust muffler 82 can reduce the noise of the air exhaust line 8. For example, the on-off valve 81 is a butterfly valve, and when the pressure in the air supply line 33 or the air outlet line 4 exceeds 5KPa, the on-off valve 81 in the air discharge line 8 is opened.
As shown in fig. 2, in some embodiments, the number of adsorption towers 1 is two, and two first pipelines 11 on the two adsorption towers 1 are communicated through a fifth pipeline 13, and a control valve 7 is arranged on the fifth pipeline 13. Specifically, the control valves 7 of the two first lines 11 on the two adsorption columns 1 are located on the side of the fifth line 13 remote from the adsorption columns 1, i.e., the control valves 7 on the first lines 11 are located downstream of the fifth line 13 on the first line 11. The two adsorption towers 1 are alternately operated in the air inlet period, namely, the two adsorption towers 1 alternately operate, the first adsorption tower 1 is positioned in the air inlet period to produce oxygen, the second adsorption tower 1 is positioned in the air outlet period to produce nitrogen, when the two adsorption towers 1 are switched, one adsorption tower 1 is at high pressure (about 50 KPa), the other adsorption tower 1 is at negative pressure (about-45 KPa), and when the two adsorption towers 1 are switched, the two adsorption towers 1 are communicated by opening the control valve 7 on the fifth pipeline 13, so that the two adsorption towers 1 are in pressure equalizing operation.
As shown in fig. 1 and 2, in some embodiments, the control valves 7 on the third pipeline 5 and the fourth pipeline 6 are program control valves, and the program control valves can preset opening and closing time through programs. In the first preset time of the exhaust cycle of the adsorption tower 1, the program control valve on the third pipeline 5 is opened, the program control valve on the fourth pipeline 6 is closed, and after the first preset time of the exhaust cycle of the adsorption tower 1, the program control valve on the third pipeline 5 is closed, and the program control valve on the fourth pipeline 6 is opened. For example, the programmable valve is a butterfly valve with programmable control.
Specifically, the first preset time is 2 seconds or more and 3 seconds or less. That is, the program control valve on the third line 5 is opened and the program control valve on the fourth line 6 is closed within 2 to 3 seconds of the exhaust cycle into the adsorption tower 1, so that the polluted nitrogen can be discharged from the third line 5 during the exhaust cycle. After 2 to 3 seconds of the exhaust cycle of the adsorption tower 1, the program control valve on the third pipeline 5 is closed, and the program control valve on the fourth pipeline 6 is opened, so that after the vacuum degree in the adsorption tower 1 reaches-10 KPa, the vacuumizing device 41 is selectively communicated with the fourth pipeline 6 (the third pipeline 5 is closed), at the moment, nitrogen in the adsorption tower 1 begins to be greatly resolved from the molecular sieve, and at the moment, the concentration (quality) of the extracted nitrogen is high, so that high-concentration nitrogen can enter the nitrogen buffer tank 61 through the fourth pipeline 6, and the high-concentration nitrogen can be collected by the nitrogen buffer tank 61. For example, the first preset time is 2.5 seconds.
As shown in fig. 1 and 2, in some embodiments, a gas drying device 62 is disposed on the fourth pipeline 6, and the gas drying device 62 is used to dry the gas introduced into the fourth pipeline 6. The gas in the fourth pipeline 6 is dried by one of a cooling separation method, a solvent absorption method and a solid drying method. The gas drying device 62 is a drying device used in one of a cooling separation method, a solvent absorption method, and a solid drying method. For example, when nitrogen gas in the fourth pipeline 6 is dried by a cooling separation method, the gas drying device 62 includes a cooler and a demister which are sequentially connected, and moisture (nitrogen gas) is cooled by the cooler and then enters the demister (droplet catcher) to be subjected to gas-liquid separation, thereby obtaining a dry gas. When nitrogen in the fourth line 6 is dried by the solvent absorption method, the drying device 62 includes an absorption tower and a trap, and moisture (nitrogen) enters the drying tower from the bottom of the absorption tower to be absorbed by the drying agent, and then enters the trap to separate the gas from the drying agent droplets. When nitrogen in the fourth pipeline 6 is dried by the solid drying method, the gas drying device 62 includes a cooler, a filter and two dehydration towers, and moisture (nitrogen) sequentially enters the two dehydration towers to be dehydrated after passing through the cooler and the filter.
As shown in fig. 1 and 2, in some embodiments, the outlet of the third conduit 5 communicates with a muffler tower 51 to facilitate the removal of dirty nitrogen.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (10)
1. A pressure swing adsorption oxygen and nitrogen generating apparatus comprising:
the adsorption tower is provided with a first pipeline and a second pipeline which are communicated with the adsorption tower, a molecular sieve for absorbing nitrogen is arranged in the adsorption tower, and the adsorption tower is provided with an air inlet period and an air exhaust period;
the inlet of the oxygen buffer tank is communicated with the first pipeline, and in the air inlet period of the adsorption tower, oxygen in the adsorption tower is introduced into the oxygen buffer tank through the first pipeline;
the air supply device is communicated with the second pipeline, and in the air inlet period of the adsorption tower, the air supply device is used for introducing air into the adsorption tower through the air inlet pipeline and the second pipeline;
the two ends of the air outlet pipeline are respectively communicated with the inlets of the second pipeline and the vacuumizing device, and the vacuumizing device can pump out the gas in the adsorption tower through the second pipeline and the air outlet pipeline in the exhaust period of the adsorption tower;
and the vacuumizing device is selectively communicated with one of the third pipeline and the fourth pipeline, the third pipeline is used for discharging nitrogen, and an outlet of the fourth pipeline is communicated with the nitrogen buffer tank.
2. The pressure swing adsorption oxygen and nitrogen plant of claim 1, wherein a control valve is provided on each of the first, second, intake, third and fourth lines.
3. The pressure swing adsorption oxygen and nitrogen generating apparatus according to claim 2, wherein,
the plurality of adsorption towers are provided, the plurality of first pipelines of the plurality of adsorption towers are communicated with the oxygen buffer tank, and the plurality of second pipelines of the plurality of adsorption towers are communicated with the air outlet pipeline;
the plurality of air inlet pipelines are communicated with the second pipelines on the adsorption towers in a one-to-one correspondence manner.
4. A pressure swing adsorption oxygen and nitrogen generating apparatus according to claim 3, further comprising an air filter and an air supply line, said air filter being disposed at an inlet of said air supply line, said air supply being disposed on said air supply line, each of said air inlet lines being in communication with an outlet of said air supply line.
5. The pressure swing adsorption oxygen and nitrogen generating apparatus according to claim 4, wherein the air supply pipeline and the air outlet pipeline are both provided with an exhaust pipeline, the air outlet pipeline is provided with a switch valve, and an outlet of the exhaust pipeline is provided with an exhaust silencer.
6. A pressure swing adsorption oxygen and nitrogen generating apparatus according to claim 3, wherein there are two adsorption towers, and two first pipelines on the two adsorption towers are communicated through a fifth pipeline, and a control valve is provided on the fifth pipeline.
7. The pressure swing adsorption oxygen and nitrogen plant of claim 2, wherein the control valves on the third and fourth lines are program control valves, the program control valve on the third line being open during a first predetermined time of the adsorption column vent cycle, the program control valve on the fourth line being closed, the program control valve on the third line being closed after the first predetermined time of the adsorption column vent cycle, the program control valve on the fourth line being open.
8. The pressure swing adsorption oxygen and nitrogen generating apparatus of claim 7, wherein the first predetermined time is greater than or equal to 2 seconds and less than or equal to 3 seconds.
9. The pressure swing adsorption oxygen and nitrogen generating apparatus according to claim 1, wherein a gas dryer is provided on the fourth pipe for drying the gas introduced into the fourth pipe.
10. The pressure swing adsorption oxygen and nitrogen plant according to any of claims 1 to 9, wherein the outlet of the third conduit communicates with a silencing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311303659.XA CN117244360A (en) | 2023-10-09 | 2023-10-09 | Pressure swing adsorption oxygen and nitrogen making device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311303659.XA CN117244360A (en) | 2023-10-09 | 2023-10-09 | Pressure swing adsorption oxygen and nitrogen making device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117244360A true CN117244360A (en) | 2023-12-19 |
Family
ID=89129193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311303659.XA Pending CN117244360A (en) | 2023-10-09 | 2023-10-09 | Pressure swing adsorption oxygen and nitrogen making device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117244360A (en) |
-
2023
- 2023-10-09 CN CN202311303659.XA patent/CN117244360A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101724898B1 (en) | Humidification device for fuel cell | |
| CN201988318U (en) | High-efficiency compressed air drying and purifying device | |
| EP0860194A1 (en) | A process for drying compressed air | |
| CN220899967U (en) | Pressure swing adsorption oxygen and nitrogen making device | |
| CN211733852U (en) | Pressure swing adsorption oxygen generating device | |
| CN117244360A (en) | Pressure swing adsorption oxygen and nitrogen making device | |
| CN212728765U (en) | Cyclic deoxygenation nitrogen-rich insect prevention device for closed bin | |
| CN112021636A (en) | Cyclic deoxidation nitrogen-rich insect prevention device and method for closed bin | |
| US6451097B1 (en) | Air treatment plant provided with noise attenuation means | |
| CN207113423U (en) | Ultrasound-enhanced cold wind drier | |
| JP2012005991A (en) | Moisture removal filter | |
| CN216295564U (en) | Energy-saving purification device for gas production | |
| CN201291113Y (en) | Adjustable compressed air film drying tube | |
| CN212411569U (en) | Small-hole pressure-reducing injection silencer and multi-stage small-hole pressure-reducing injection silencer | |
| CN109941756B (en) | Particle screening method and powder fluidization device | |
| CN211025735U (en) | Adsorption type drying system without air consumption | |
| CN213433721U (en) | Equipment of making an uproar falls in wet-type vacuum pump | |
| CN206625951U (en) | Centralized muffling and exhausting device | |
| CN218358314U (en) | Air adsorption equipment for oxygen generator | |
| CN219186400U (en) | Oxygenerator of full-automatic degree of depth desorption molecular sieve | |
| CN206613352U (en) | Regeneration dryer | |
| CN201493043U (en) | Compression heat regeneration adsorption compressed air dryer with zero air consumption and low dew point | |
| CN216418814U (en) | Double molecular sieve tower oxygenerator | |
| CN210699411U (en) | Oil gas recovery processing device | |
| CN220250393U (en) | Refrigerator with a refrigerator body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |