CN113663469B - Molecular sieve gas separation device and control method thereof - Google Patents
Molecular sieve gas separation device and control method thereof Download PDFInfo
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- 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
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- 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
- B01D53/0454—Controlling adsorption
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- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
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Abstract
The invention relates to the field of medical equipment, and discloses a molecular sieve gas separation device which comprises a compressor, a first gas inlet pipe, a first pressure pump, a first gas storage chamber, a first molecular sieve, a second gas inlet pipe, a second gas storage chamber, a second molecular sieve and a gas outlet pipe group, wherein the first gas inlet pipe is connected with the first pressure pump; one end of the first air inlet pipe is connected with the compressor, and the other end of the first air inlet pipe is connected with a first branch pipe and a second branch pipe respectively; the first air storage chamber is respectively connected with the first branch pipe and the second branch pipe; the first molecular sieve is arranged in the first air storage chamber; the second molecular sieve is arranged in the second air storage chamber; one end of the air outlet pipe group is communicated with the second air storage chamber, and the other end of the air outlet pipe group is connected with a plurality of air storage tanks respectively. The invention can quickly and effectively realize gas separation, has high working efficiency, achieves the oxygen supply effect, is more environment-friendly, can be recycled and saves the cost.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a molecular sieve gas separation device and a control method thereof.
Background
The situation of oxygen deficiency in the world is more and more obvious nowadays, and due to the fact that economy is globalized, modern industry is rapidly developed, disorder of cutting and deforestation are conducted, a large number of forests are destroyed, harmful gas in the atmosphere is rapidly increased, and oxygen content is obviously reduced. With the increasing importance of people on health, the 'big health' becomes the current development trend, the low-flow oxygen therapy and the oxygen health care are quick, beneficial and harmless without special guidance effect, the oxygen therapy has the effect of relieving the anoxic symptoms in time, and only partial and gradual effects are achieved on eliminating the reasons causing the anoxia. Oxygen therapy is the main means for correcting physiological and environmental hypoxia and preventing and treating diseases caused by environmental hypoxia. In the prior art, the oxygen purity of a medical oxygen generator is not high, so that the use effect of a patient is influenced, and some air purification oxygen generators adopt a general molecular sieve to realize oxygen supply, so that the manufacturing cost is high although the oxygen concentration can be very high, and the cyclic utilization cannot be realized.
Disclosure of Invention
Based on the above problems, the invention aims to provide a molecular sieve gas separation device and a control method thereof, which can quickly and effectively realize gas separation, have high working efficiency, achieve oxygen supply effect, are more environment-friendly, can be recycled, and save cost; and the manufacturing cost is lower, can be widely applied to breathing machines, oxygen generators, physiotherapy beds and the like, and has wide application and good market prospect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a molecular sieve gas separation device comprising: the device comprises a compressor, a first air inlet pipe, a first pressure pump, a first air storage chamber, a first molecular sieve, a second air inlet pipe, a second air storage chamber, a second molecular sieve and an air outlet pipe group;
one end of the first air inlet pipe is connected with the compressor, and the other end of the first air inlet pipe is connected with a first branch pipe and a second branch pipe respectively;
the first pressure pump is arranged on the first air inlet pipe;
the first air storage chamber is respectively connected with the first branch pipe and the second branch pipe;
the first molecular sieve is arranged in the first air storage chamber, the first air storage chamber is divided into a first air storage cavity and a second air storage cavity by the first molecular sieve, the first air storage cavity is communicated with the first branch pipe, and the second air storage cavity is communicated with the second branch pipe;
one end of the second air inlet pipe is communicated with the first air storage cavity, and the other end of the second air inlet pipe is connected with a third branch pipe and a fourth branch pipe respectively;
the second air storage chamber is respectively connected with the third branch pipe and the fourth branch pipe;
the second molecular sieve is arranged in the second air storage chamber, the second air storage chamber is divided into a third air storage cavity and a fourth air storage cavity by the second molecular sieve, the third air storage cavity is communicated with the third branch pipe, and the fourth air storage cavity is communicated with the fourth branch pipe;
one end of the air outlet pipe group is communicated with the second air storage chamber, and the other end of the air outlet pipe group is respectively connected with a plurality of air storage tanks;
the first branch pipe, the second branch pipe, the third branch pipe, the fourth branch pipe and the air outlet pipe group are all provided with electromagnetic valves for controlling opening and closing, the aperture of the first molecular sieve is smaller than or equal to 0.35 nanometer, and the aperture of the second molecular sieve is smaller than or equal to 0.34 nanometer.
In some embodiments, the air outlet pipe set comprises a first air outlet pipe, the air storage tank comprises a first air storage tank, one end of the first air outlet pipe is connected with a first air outlet branch pipe and a second air outlet branch pipe respectively, the first air outlet branch pipe is communicated with the third air storage cavity, the second air outlet branch pipe is communicated with the fourth air storage cavity, and the other end of the first air outlet pipe is connected with the first air storage tank.
In some embodiments, the air outlet pipe set comprises a second air outlet pipe, the air storage tank comprises a second air storage tank, one end of the second air outlet pipe is communicated with the third air storage cavity, and the other end of the second air outlet pipe is communicated with the second air storage tank.
In some embodiments, the air outlet pipe set comprises a third air outlet pipe, the air storage tank comprises a third air storage tank, one end of the third air outlet pipe is communicated with the fourth air storage cavity, and the other end of the third air outlet pipe is communicated with the third air storage tank.
In some embodiments, a second pressure pump is disposed on each of the first outlet pipe, the second outlet pipe and the third outlet pipe.
In some embodiments, a pressure reducing valve is disposed on each of the second outlet pipe and the third outlet pipe.
In some embodiments, the first branch gas outlet pipe and the second branch gas outlet pipe are both provided with electromagnetic valves.
In some embodiments, a pressure relief assembly is disposed at the bottom of the second air reservoir.
In some embodiments, the pressure relief assembly includes a pressure relief tube having a solenoid valve disposed thereon and a pressure regulating tube having a pressure relief valve disposed thereon.
A method of controlling a molecular sieve gas separation plant using a molecular sieve gas separation plant as claimed in any one of the preceding claims, the method comprising the steps of:
starting the compressor and the first pressure pump to start working, conducting the second branch pipe, closing the first branch pipe, enabling gas to enter the second gas storage cavity through the first gas inlet pipe and the second branch pipe, and enabling gas with the molecular diameter smaller than or equal to 0.35 nanometer to enter the first gas storage cavity through the first molecular sieve;
switch on the second intake pipe with the third lateral pipe, the gaseous process in the first gas storage intracavity the second intake pipe with the third lateral pipe gets into in the third gas storage intracavity, the gaseous process that molecular diameter is less than or equal to 0.34 nanometer the second molecular sieve gets into in the fourth gas storage intracavity, switch on the play gas pipe group, be located the gaseous via of third gas storage intracavity the play gas pipe group gets into in the gas holder.
The invention has the beneficial effects that:
the invention provides a molecular sieve gas separation device and a control method thereof, wherein gas in air firstly enters a second gas storage cavity through a compressor and a first pressure pump, then is filtered through a first molecular sieve, the gas with the molecular diameter larger than 0.35 nm is left in the second gas storage cavity, the gas with the molecular diameter smaller than or equal to 0.35 nm enters the first gas storage cavity through the first molecular sieve, the air in the first gas storage cavity enters a third gas storage cavity through a second gas inlet pipe, then is filtered through the second molecular sieve, the gas with the molecular diameter larger than 0.34 nm is left in the third gas storage cavity, the gas with the molecular diameter smaller than or equal to 0.34 nm enters a fourth gas storage cavity through the second molecular sieve, and the gas in the third gas storage cavity is finally discharged into a gas storage tank through a gas outlet pipe group and is collected; because the molecular diameter of the oxygen is 0.346 nanometer, the molecular diameter of the nitrogen is 0.364 nanometer, the first molecular sieve separates other gases with the molecular diameter larger than that of the oxygen, the second molecular sieve separates other gases with the molecular diameter smaller than that of the oxygen, and finally high-concentration oxygen can be obtained;
after the first molecular sieve is subjected to first gas separation, the second branch pipe is closed, the first branch pipe and the pressure relief assembly are opened, gas enters the first gas storage cavity through the first gas inlet pipe and the first branch pipe, and gas with smaller molecular diameter in the air flows into the second gas storage cavity through the first molecular sieve due to the fact that the pressure relief assembly reduces the pressure of the second gas storage cavity, so that backflushing on the first molecular sieve is formed, and blocking of the first molecular sieve is avoided;
after the second molecular sieve is subjected to second gas separation, the gas in the first gas storage cavity is controlled to enter the fourth gas storage cavity through the fourth branch pipe, the third gas storage cavity is decompressed, and the gas with smaller molecular diameter flows into the third gas storage cavity through the second molecular sieve, so that the recoil of the second molecular sieve is formed, and the blockage of the second molecular sieve is avoided;
the invention can quickly and effectively realize gas separation, has high working efficiency, achieves the oxygen supply effect, is more environment-friendly, can be recycled and saves the cost; and the manufacturing cost is lower, can be widely applied to breathing machines, oxygen generators, physiotherapy beds and the like, and has wide application and good market prospect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a molecular sieve gas separation unit of the present invention.
In the figure: 1. a compressor; 2. a first intake pipe; 3. a first pressure pump; 4. a first air reservoir; 401. a first gas storage chamber; 402. a second gas storage chamber; 5. a first molecular sieve; 6. a first branch pipe; 7. a second branch pipe; 8. a second intake pipe; 9. a third branch pipe; 10. a fourth branch pipe; 11. a second air reservoir; 1101. a third gas storage chamber; 1102. a fourth gas storage chamber; 12. a second molecular sieve; 13. an air outlet pipe group; 14. a gas storage tank; 15. a pressure relief pipe; 16. a pressure regulating pipe; 17. a pressure discharge pipe; 18. a first air outlet pipe; 19. a second air outlet pipe; 20. a third outlet pipe; 21. a first branched gas outlet pipe; 22. a second outlet branch pipe; 23. a first solenoid valve; 24. a second solenoid valve; 25. a third electromagnetic valve; 26. a third electromagnetic valve; 27. a fifth solenoid valve; 28. a sixth electromagnetic valve; 29. a seventh electromagnetic valve; 30. an eighth solenoid valve; 31. a first pressure reducing valve; 32. a second pressure reducing valve; 33. a third pressure reducing valve; 34. a fourth pressure reducing valve; 35. a first gas storage tank; 36. a second gas tank; 37. a third air storage tank,
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, 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 relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present embodiment provides a molecular sieve gas separation device, which includes a compressor 1, a first gas inlet pipe 2, a first pressure pump 3, a first gas storage chamber 4, a first molecular sieve 5, a second gas inlet pipe 8, a second gas storage chamber 11, a second molecular sieve 12, and a gas outlet pipe group 13; one end of the first air inlet pipe 2 is connected with the compressor 1, and the other end of the first air inlet pipe is connected with a first branch pipe 6 and a second branch pipe 7 respectively; the first pressure pump 3 is mounted on the first air inlet pipe 2; the first air reservoir 4 is connected to the first branch pipe 6 and the second branch pipe 7, respectively; the first molecular sieve 5 is installed in the first air storage chamber 4, the first air storage chamber 4 is divided into a first air storage cavity 401 and a second air storage cavity 402 by the first molecular sieve 5, the first air storage cavity 401 is communicated with the first branch pipe 6, and the second air storage cavity 402 is communicated with the second branch pipe 7; one end of the second air inlet pipe 8 is communicated with the first air storage cavity 401, and the other end of the second air inlet pipe is connected with a third branch pipe 9 and a fourth branch pipe 10 respectively; the second air reservoir 11 is connected with the third branch pipe 9 and the fourth branch pipe 10 respectively; the second molecular sieve 12 is installed in the second air storage chamber 11, the second molecular sieve 12 divides the second air storage chamber 11 into a third air storage cavity 1101 and a fourth air storage cavity 1102, the third air storage cavity 1101 is communicated with the third branch pipe 9, and the fourth air storage cavity 1102 is communicated with the fourth branch pipe 10; one end of the air outlet pipe group 13 is communicated with the second air storage chamber 11, and the other end of the air outlet pipe group is respectively connected with a plurality of air storage tanks 14; electromagnetic valves for controlling the on-off are arranged on the first branch pipe 6, the second branch pipe 7, the third branch pipe 9, the fourth branch pipe 10 and the gas outlet pipe group 13, the aperture of the first molecular sieve 5 is smaller than or equal to 0.35 nanometer, and the aperture of the second molecular sieve 12 is smaller than or equal to 0.34 nanometer.
The solenoid valves include a first solenoid valve 23, a second solenoid valve 24, a third solenoid valve 25, a fourth solenoid valve 26 and a fifth solenoid valve 27, the first solenoid valve 23 is disposed on the first branch pipe 6, the second solenoid valve 24 is disposed on the second branch pipe 7, the third solenoid valve 25 is disposed on the third branch pipe 9, the fourth solenoid valve 26 is disposed on the fourth branch pipe 10, and the fifth solenoid valve 27 is disposed on the second intake pipe 8.
The molecular diameter of the gas is as follows: the molecular diameter of oxygen is 0.346 nm, the molecular diameter of nitrogen is 0.364 nm, the molecular diameter of carbon dioxide is 0.33 nm, and the molecular diameter of carbon monoxide is 0.376 nm.
Based on the above scheme, when the compressor 1 and the first pressure pump 3 work, the second electromagnetic valve 24 and the fifth electromagnetic valve 27 are opened, the first electromagnetic valve 23 is closed, the mixed gas enters the second gas storage cavity 402 of the first gas storage chamber 4, the gas with the molecular diameter less than or equal to 0.35 nanometer in the mixed gas enters the first gas storage cavity 401 through the first molecular sieve 5, if nitrogen and nitric oxide are left in the second gas storage cavity 402, oxygen and other gases such as carbon dioxide with the molecular diameter smaller than that of the oxygen enter the first gas storage cavity 401, and the gas in the second gas storage cavity 402 can be discharged through a pipeline. After working for a certain time, the second electromagnetic valve 24 and the fifth electromagnetic valve 27 are closed, the first electromagnetic valve 23 is opened, the mixed gas enters the first gas storage cavity 401 through the first gas inlet pipe 2 and the first branch pipe 6, because the pressure of the first gas storage cavity 401 is greater than that of the second gas storage cavity 402, the gas with the molecular diameter less than or equal to 0.35 nanometer in the mixed gas enters the second gas storage cavity 402 through the first molecular sieve 5, the backflushing on the first molecular sieve 5 is formed, the situation that the first molecular sieve 5 is blocked is avoided, the actions are repeated after three seconds, the circulation is continuous, and the first molecular sieve 5 is guaranteed not to be blocked. After the above steps, the third electromagnetic valve 25 is opened, the fourth electromagnetic valve 26 is closed, the gas in the first gas storage cavity 401 enters the third gas storage cavity 1101 through the second gas inlet pipe 8 and the third branch pipe 9, the gas with the molecular diameter less than or equal to 0.34 nm enters the fourth gas storage cavity 1102 through the second molecular sieve 12, if the oxygen does not pass through the second molecular sieve 12, the gas with the molecular diameter smaller than that of the oxygen, such as carbon dioxide, enters the fourth gas storage cavity 1102 through the second molecular sieve 12, and the oxygen remaining in the third gas storage cavity 1101 is collected into the gas storage tank 14 through the gas outlet pipe set 13.
In some embodiments, the air outlet pipe group 13 includes a first air outlet pipe 18, the air outlet tank includes a first air outlet pipe 35, one end of the first air outlet pipe 18 is connected with a first air outlet branch pipe 21 and a second air outlet branch pipe 22, respectively, the first air outlet branch pipe 21 is communicated with the third air storage cavity 1101, the second air outlet branch pipe 22 is communicated with the fourth air storage cavity 1102, and the other end of the first air outlet pipe 18 is connected with the first air outlet pipe 35.
In some embodiments, the air outlet pipe group 13 comprises a second air outlet pipe 19, the air storage tank 14 comprises a second air storage tank 36, one end of the second air outlet pipe 19 is communicated with the third air storage cavity 1101, and the other end is communicated with the second air storage tank 36.
In some embodiments, the air outlet pipe set 13 includes a third air outlet pipe 20, the air storage tank 14 includes a third air storage tank 37, and one end of the third air outlet pipe 20 is communicated with the fourth air storage cavity 1102, and the other end is communicated with the third air storage tank 37.
In some embodiments, a second pressure pump is disposed on each of the first outlet pipe 18, the second outlet pipe 19 and the third outlet pipe 20.
In some embodiments, a pressure reducing valve is disposed on each of the second outlet pipe 19 and the third outlet pipe 20.
In some embodiments, electromagnetic valves are disposed on both the first branched outlet pipe 21 and the second branched outlet pipe 22.
In some embodiments, the bottom of the second air reservoir 402 is provided with a pressure relief assembly.
In some embodiments, the pressure relief assembly includes a pressure relief pipe 15 and a pressure regulating pipe 16, wherein the pressure relief pipe 15 is provided with a solenoid valve, and the pressure regulating pipe 16 is provided with a pressure reducing valve.
In some embodiments, a third pressure pump is provided in the second inlet line 8.
In some embodiments, the top of the first air reservoir 401 is provided with a pressure discharge tube 17.
The sixth solenoid valve 28 is disposed on the pressure relief pipe 15, the seventh solenoid valve 29 is disposed on the first branched gas outlet pipe 21, the eighth solenoid valve 30 is disposed on the second branched gas outlet pipe 22, the first pressure reducing valve 31 is disposed on the pressure regulating pipe 16, the second pressure reducing valve 32 is disposed on the pressure relief pipe 17, the third pressure reducing valve 33 is disposed on the second gas outlet pipe 19, and the fourth pressure reducing valve 34 is disposed on the third gas outlet pipe 20.
Based on the above scheme, after the gas in the third gas storage chamber 1101 is filtered by the second molecular sieve 12, the seventh electromagnetic valve 29 is opened, the eighth electromagnetic valve 30, the third pressure reducing valve 33 and the fourth pressure reducing valve 34 are closed, and the oxygen in the third gas storage chamber 1101 is collected in the first gas storage tank 35 through the first branched gas outlet pipe 21 and the first gas outlet pipe 18. After a period of time has elapsed, the fourth pressure reducing valve 34 is opened, and the gas in the fourth gas storage chamber 1102 enters the third gas storage tank 37 through the third gas outlet pipe 20. The seventh electromagnetic valve 29 and the third electromagnetic valve 25 are closed, the fourth electromagnetic valve 26 is opened, the gas in the first gas storage cavity 401 enters the fourth gas storage cavity 1102 through the second gas inlet pipe 8 and the fourth branch pipe 10, the gas with smaller molecular diameter enters the third gas storage cavity 1101 through the second molecular sieve 12 to form backflushing on the second molecular sieve 12, the blockage of the second molecular sieve 12 is avoided, the eighth electromagnetic valve 30 and the third reducing valve 33 are opened, the gas in the third gas storage cavity 1101 enters the second gas storage tank 36, and the oxygen in the fourth gas storage cavity 1102 enters the first gas storage tank 35.
A method of controlling a molecular sieve gas separation plant using a molecular sieve gas separation plant as claimed in any one of the preceding claims, the method comprising the steps of:
starting the compressor 1 and the first pressure pump 3 to start working, conducting the second branch pipe 7, closing the first branch pipe 6, allowing gas to enter the second gas storage cavity 402 through the first gas inlet pipe 2 and the second branch pipe 7, and allowing gas with a molecular diameter less than or equal to 0.35 nanometer to enter the first gas storage cavity 401 through the first molecular sieve 5;
the second gas inlet pipe 8 and the third branch pipe 9 are conducted, the gas in the first gas storage cavity 401 enters the third gas storage cavity 1101 through the second gas inlet pipe 8 and the third branch pipe 9, the gas with the molecular diameter less than or equal to 0.34 nanometer enters the fourth gas storage cavity 1102 through the second molecular sieve 12, the gas outlet pipe group 13 is conducted, and the gas in the third gas storage cavity 1101 enters the gas storage tank 14 through the gas outlet pipe group 13.
The method comprises the following specific steps:
s1, closing the first electromagnetic valve 23 and the sixth electromagnetic valve 28, opening the second electromagnetic valve 24 and the fifth electromagnetic valve 27, enabling the mixed gas to enter the second gas storage cavity 402 through the first gas inlet pipe 2 and the second branch pipe 7, filtering out gas such as oxygen through the first molecular sieve 5, enabling the gas to enter the first gas storage cavity 401, and enabling the gas in the first gas storage cavity 401 to enter the second gas storage chamber 11 through the second gas inlet pipe 8;
s2, closing the second electromagnetic valve 24 and the fifth electromagnetic valve 27, opening the first electromagnetic valve 23, the sixth electromagnetic valve 28 and the first pressure reducing valve 31, enabling the mixed gas to enter the first gas storage cavity 401 through the first gas inlet pipe 2 and the first branch pipe 6, opening the sixth electromagnetic valve 28 and the first pressure reducing valve 31 for several seconds, then closing the sixth electromagnetic valve 28 and the first pressure reducing valve 31, enabling oxygen in the first gas storage cavity 401 to enter the second gas storage cavity 402 to recoil the first molecular sieve 5 due to the fact that the pressure in the second gas storage cavity 402 is reduced, after a period of time, closing the first electromagnetic valve 23, opening the second pressure reducing valve 32, discharging the gas in the first gas storage cavity 401, and repeating the steps;
s3, opening the fifth electromagnetic valve 27 and the third electromagnetic valve 25, and closing the seventh electromagnetic valve 29, the eighth electromagnetic valve 30 and the third pressure reducing valve 33; the gas entering the third gas storage cavity 1101 enters the fourth gas storage cavity 1102 through the second molecular sieve 12, and oxygen is left in the third gas storage cavity 1101;
s4, closing the third solenoid valve 25, opening the seventh solenoid valve 29 and the fourth pressure reducing valve 34, allowing oxygen to enter the first air storage tank 35 through the first branched gas outlet pipe 21 and the first gas outlet pipe 18, and allowing gas in the fourth air storage chamber 1102 to be discharged into the third air storage tank 37 through the third gas outlet pipe 20;
s5, opening the fourth electromagnetic valve 26 and closing the seventh electromagnetic valve 29, wherein the gas in the first gas storage cavity 401 enters the fourth gas storage cavity 1102 through the second gas inlet pipe 8 and the fourth branch pipe 10, and the gas with the molecular diameter smaller than that of oxygen enters the third gas storage cavity 1101 through the second molecular sieve 12 to perform backflushing on the second molecular sieve 12;
s6, the fourth solenoid valve 26 is closed, the eighth solenoid valve 30 and the third pressure reducing valve 33 are opened, oxygen in the fourth gas storage cavity 1102 enters the first gas storage tank 35 through the second gas outlet branch pipe 22 and the first gas outlet pipe 18, and other gas in the third gas storage cavity 1101 enters the second gas storage tank 36 through the second gas outlet pipe 19.
In conclusion, the molecular sieve gas separation device provided by the embodiment can quickly and effectively realize gas separation, has high working efficiency, achieves an oxygen supply effect, is more environment-friendly, can be recycled, and saves the cost; and the manufacturing cost is lower, can be widely applied to breathing machines, oxygen generators, physiotherapy beds and the like, and has wide application and good market prospect. The programmer continuously adjusts the electromagnetic valve switch to carry out forward and reverse flow on the molecular sieve, so that gas molecules with larger molecular diameters are prevented from blocking micropores of the molecular sieve plate, and the device is high in working efficiency and long in service life.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (5)
1. A molecular sieve gas separation device, comprising:
a compressor;
one end of the first air inlet pipe is connected with the compressor, and the other end of the first air inlet pipe is connected with a first branch pipe and a second branch pipe respectively;
a first pressure pump mounted on the first intake pipe;
a first air reservoir connected to the first branch pipe and the second branch pipe, respectively;
a first molecular sieve mounted within the first gas reservoir, the first molecular sieve dividing the first gas reservoir into a first gas reservoir and a second gas reservoir, the first gas reservoir communicating with the first branch pipe, the second gas reservoir communicating with the second branch pipe;
one end of the second air inlet pipe is communicated with the first air storage cavity, and the other end of the second air inlet pipe is connected with a third branch pipe and a fourth branch pipe respectively;
a second air reservoir connected to the third branch pipe and the fourth branch pipe, respectively;
a second molecular sieve mounted within the second gas reservoir, the second molecular sieve dividing the second gas reservoir into a third gas reservoir and a fourth gas reservoir, the third gas reservoir communicating with the third branch pipe, the fourth gas reservoir communicating with the fourth branch pipe;
one end of the air outlet pipe group is communicated with the second air storage chamber, and the other end of the air outlet pipe group is respectively connected with a plurality of air storage tanks;
the first branch pipe, the second branch pipe, the third branch pipe, the fourth branch pipe and the gas outlet pipe group are all provided with electromagnetic valves for controlling on and off, the aperture of the first molecular sieve is less than or equal to 0.35 nanometer, and the aperture of the second molecular sieve is less than or equal to 0.34 nanometer;
the air outlet pipe group comprises a first air outlet pipe, a second air outlet pipe and a third air outlet pipe, the air storage tank comprises a first air storage tank, a second air storage tank and a third air storage tank, one end of the first air outlet pipe is connected with a first air outlet branch pipe and a second air outlet branch pipe respectively, the first air outlet branch pipe is communicated with the third air storage cavity, the second air outlet branch pipe is communicated with the fourth air storage cavity, the other end of the first air outlet pipe is connected with the first air storage tank, one end of the second air outlet pipe is communicated with the third air storage cavity, the other end of the second air outlet pipe is communicated with the second air storage tank, one end of the third air outlet pipe is communicated with the fourth air storage cavity, and the other end of the third air outlet pipe is communicated with the third air storage tank;
the second air outlet pipe and the third air outlet pipe are both provided with a pressure reducing valve;
and a pressure relief assembly is arranged at the bottom of the second air storage cavity.
2. The molecular sieve gas separation device of claim 1, wherein a second pressure pump is disposed on each of the first outlet conduit, the second outlet conduit, and the third outlet conduit.
3. The molecular sieve gas separation device of claim 1, wherein the first branch gas outlet pipe and the second branch gas outlet pipe are each provided with a solenoid valve.
4. The molecular sieve gas separation device of claim 1, wherein the pressure relief assembly comprises a pressure relief pipe and a pressure regulating pipe, the pressure relief pipe is provided with an electromagnetic valve, and the pressure regulating pipe is provided with a pressure reducing valve.
5. A method for controlling a molecular sieve gas separation plant, characterized in that a molecular sieve gas separation plant according to any one of claims 1 to 4 is used, the method comprising the steps of:
starting the compressor and the first pressure pump to start working, conducting the second branch pipe, closing the first branch pipe, enabling gas to enter the second gas storage cavity through the first gas inlet pipe and the second branch pipe, and enabling gas with the molecular diameter smaller than or equal to 0.35 nanometer to enter the first gas storage cavity through the first molecular sieve;
switch on the second intake pipe with the third lateral pipe, the gaseous process in the first gas storage intracavity the second intake pipe with the third lateral pipe gets into in the third gas storage intracavity, the gaseous process that molecular diameter is less than or equal to 0.34 nanometer the second molecular sieve gets into in the fourth gas storage intracavity, switch on the play gas pipe group, be located the gaseous via of third gas storage intracavity the play gas pipe group gets into in the gas holder.
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