CN113041801A - Method for gas exchange and filtration by applying molecular membrane in closed environment - Google Patents
Method for gas exchange and filtration by applying molecular membrane in closed environment Download PDFInfo
- Publication number
- CN113041801A CN113041801A CN202110273941.2A CN202110273941A CN113041801A CN 113041801 A CN113041801 A CN 113041801A CN 202110273941 A CN202110273941 A CN 202110273941A CN 113041801 A CN113041801 A CN 113041801A
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- Prior art keywords
- membrane
- air
- closed environment
- molecular
- gas
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- 239000012528 membrane Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001914 filtration Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 73
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012510 hollow fiber Substances 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- B01D53/22—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 diffusion
- B01D53/228—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 diffusion characterised by specific membranes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method for gas exchange and filtration by applying a molecular membrane in a closed environment, which comprises the following steps: s1, ensuring the internal circulation air pressure of the closed environment through air draft equipment, and drawing the air to be processed in the closed environment out of an air outlet of the closed environment and into a pipeline; s2, enabling air pumped out from the exhaust port to pass through a molecular membrane through air pumping equipment, wherein the molecular membrane is a membrane net for gas exchange and composed of a plurality of hollow fiber membrane filaments, and is used for realizing gas exchange by utilizing molecular pressure difference, so that carbon dioxide, ammonia and water vapor in the inner cavity of the molecular membrane can diffuse to the external atmosphere environment through the membrane wall, and oxygen in the external environment diffuses to the inner cavity of the molecular membrane through the membrane wall; and S3, returning the air subjected to the exchange and filtration treatment of the molecular membrane to the inside of the closed environment through the pipeline and the air inlet of the closed environment by the air extraction equipment.
Description
Technical Field
The invention relates to the field of gas purification, in particular to a method for performing gas exchange and filtration by using a molecular membrane in a closed environment.
Background
For devices with closed environments, such as a closed incubator, a positive pressure respirator, a closed positive pressure protective suit, and the like, the sealing property of the interior of the device needs to be ensured, and clean air needs to be continuously provided for the interior of the device. The two requirements are contradictory, and harmful gas is easily mixed when clean air is supplied to the interior, so that the requirements cannot be met, and even the life safety of workers in special environments can be damaged. In order to solve the technical problem, the conventional technical means is to connect the device with an external oxygen cylinder or other gas supply equipment to continuously provide clean air for the inside of the closed environment of the device, and simultaneously, the device and the gas supply equipment are integrally isolated from the external gas environment. However, such a method is complicated in structure and troublesome to wear, and once the gas in the gas supply device is exhausted, the apparatus cannot be used.
Disclosure of Invention
In order to solve the problems in the background art, the present invention provides a method for gas exchange and filtration by using a molecular membrane in a closed environment, comprising the following steps:
s1, ensuring the internal circulation air pressure of the closed environment through air draft equipment, and drawing the air to be processed in the closed environment out of an air outlet of the closed environment and into a pipeline;
s2, enabling air pumped out from the exhaust port to pass through a molecular membrane through air pumping equipment, wherein the molecular membrane is a membrane net for gas exchange and composed of a plurality of hollow fiber membrane filaments, and is used for realizing gas exchange by utilizing molecular pressure difference, so that carbon dioxide, ammonia and water vapor in the inner cavity of the molecular membrane can diffuse to the external atmosphere environment through the membrane wall, and oxygen in the external environment diffuses to the inner cavity of the molecular membrane through the membrane wall;
and S3, returning the air subjected to the exchange and filtration treatment of the molecular membrane to the inside of the closed environment through the pipeline and the air inlet of the closed environment by the air extraction equipment.
In some embodiments, the air extraction device is an air extraction fan, and the molecular membrane and the air extraction fan both form a part of the gas exchanger;
the air inlet of the closed environment is positioned above the air outlet;
the lower end of the gas exchanger is hermetically arranged at an exhaust port of a closed environment through an installation part;
the upper end of the gas exchanger is hermetically connected with one end of a gas feed pipe, and the other end of the gas feed pipe is hermetically arranged at a gas inlet of a closed environment;
the exhaust fan is arranged between the molecular membrane and the air supply pipe.
In some embodiments, the gas exchanger further comprises a cleaning fan disposed outside the bottom end of the molecular membrane;
the cleaning fan is used for cleaning the outer wall in the gas exchange process of the gas exchanger, and a small amount of residual dirt which is filtered out by the molecular membrane and is attached to the outer wall of the molecular membrane is blown out.
Compared with the prior art, the invention has the beneficial effects that:
the method for exchanging and filtering gas by applying the molecular membrane in the closed environment provided by the invention forms an internal circulation body by utilizing the structures of the closed environment, the gas exchanger, the gas supply pipe and the like, the air draft equipment changes the gas to be treated into clean air through the exchange and filtering action of the molecular membrane, and then the clean air enters the closed environment through the gas supply pipe, so that the closed environment is isolated from the external environment, and meanwhile, a gas supply device such as an oxygen bottle is not required to be additionally used, and the method is very convenient.
Drawings
FIG. 1 is a schematic diagram of a gas purification apparatus implemented in one embodiment using a method of gas exchange and filtration using molecular membranes in a closed environment provided by the present invention;
FIG. 2 is a schematic view of the gas exchanger of FIG. 1;
in the figure: 1. sealing the environment; 2. a gas exchanger; 3. an air supply pipe; 4. an installation part; 21. a molecular membrane; 22. an air draft fan; 23. the fan is cleaned.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following description further explains how the invention is implemented by combining the attached drawings and the detailed implementation modes.
The invention provides a method for gas exchange and filtration by using a molecular membrane in a closed environment, which is characterized by comprising the following steps:
s1, ensuring the internal circulation air pressure of the closed environment 1 through air draft equipment, and pumping the air to be processed in the closed environment out of an exhaust port of the closed environment 1 and into a pipeline;
s2, enabling air pumped out from the exhaust port to pass through the molecular membrane 21 through air pumping equipment, wherein the molecular membrane 21 is a membrane net for gas exchange and composed of a plurality of hollow fiber membrane filaments, and is used for realizing gas exchange by utilizing molecular pressure difference, so that carbon dioxide, ammonia and water vapor in the inner cavity of the molecular membrane 21 can diffuse to the external atmospheric environment through the membrane wall, and oxygen in the external environment diffuses to the inner cavity of the molecular membrane 21 through the membrane wall;
s3, the clean air after the exchange and filtration treatment of the molecular membrane 21 is sent back to the inside of the closed environment 1 through the pipeline and the air inlet of the closed environment 1 by the air draft equipment.
It will be appreciated that the molecular membrane 21 allows the gas to complete the exchange process in a molecular state, and the volume of the virus and bacteria is greater than that of the gas molecules, thereby precluding the intrusion of the virus and bacteria.
Referring to fig. 1, a schematic diagram of a gas purification apparatus implemented by the method of the present invention includes a closed environment 1, a gas exchanger 2, a gas pipe 3 and a mounting part 4; the closed environment 1 is provided with an air inlet and an air outlet, and the air inlet is positioned above the air outlet; the lower end of the gas exchanger 2 is hermetically arranged at an exhaust port of the closed environment 1 through an installation part 4; the upper end of the gas exchanger 2 is hermetically connected to one end of a gas feed pipe 3, and the other end of the gas feed pipe 3 is hermetically installed at the gas inlet of the closed environment 1.
With further reference to fig. 2, the gas exchanger 2 comprises a molecular membrane 21 and an id fan 22; the molecular membrane 21 is a membrane net composed of a plurality of hollow fiber membrane filaments and is used for realizing gas exchange by utilizing molecular pressure difference, so that carbon dioxide, ammonia and water vapor in the inner cavity of the molecular membrane 21 can diffuse to the external atmosphere environment through the membrane wall, and oxygen in the external environment diffuses to the inner cavity of the molecular membrane 21 through the membrane wall; the exhaust fan 22 is arranged between the molecular membrane 21 and the air supply pipe 3 and used for pumping the gas passing through the molecular membrane 21 into the air supply pipe 3 and then entering the closed protective clothing 1 through the air inlet, and the exhaust fan 22 is also used for ensuring the internal circulation air pressure of the device.
The aperture of the micropores on the membrane wall of the molecular membrane 21 is less than 2 nanometers, so that harmful substances in the external environment can be effectively prevented from entering, and the isolation effect is ensured; meanwhile, carbon dioxide, ammonia and water vapor can be discharged, and oxygen in the external environment enters, so that relatively dirty air is converted into fresh air.
Preferably, the gas exchanger 2 further comprises a cleaning fan 23, the cleaning fan 23 being disposed outside the bottom end of the molecular membrane 21; the cleaning fan 23 is used for cleaning the outer wall during the gas exchange process of the gas exchanger 2, and blows out a small amount of residual dirt filtered out by the molecular membrane 21 and attached to the outer wall of the molecular membrane.
In summary, the method for performing gas exchange and filtration by using a molecular membrane in a closed environment provided by the invention forms an internal circulation body by using the structures of the closed environment, a gas exchanger, a gas supply pipe and the like, and the air exhaust equipment changes the gas to be treated into clean air through the exchange and filtration effects of the molecular membrane and then enters the closed environment through the gas supply pipe, so that the closed environment is isolated from the external environment, and meanwhile, a gas supply device such as an oxygen cylinder is not required to be additionally used, and the method is very convenient.
Finally, the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, which should be covered by the claims of the present invention.
Claims (3)
1. A method for gas exchange and filtration in a closed environment using a molecular membrane, comprising the steps of:
s1, ensuring the internal circulation air pressure of the closed environment (1) through air draft equipment, and pumping the air to be processed in the closed environment (1) out of an exhaust port of the closed environment (1) and into a pipeline;
s2, enabling the air to be processed pumped out from the exhaust port to pass through the molecular membrane (21) through air pumping equipment, wherein the molecular membrane (21) is a membrane net for gas exchange and composed of a plurality of hollow fiber membrane filaments, and is used for realizing gas exchange by utilizing molecular pressure difference, so that carbon dioxide, ammonia and water vapor in the inner cavity of the molecular membrane (21) can diffuse to the external atmosphere environment through the membrane wall, and oxygen in the external environment diffuses to the inner cavity of the molecular membrane (21) through the membrane wall;
and S3, returning the air subjected to the exchange and filtration treatment of the molecular membrane (21) to the inside of the closed environment (1) through the pipeline and the air inlet of the closed environment (1) by the air draft equipment.
2. The method for gas exchange and filtration by using molecular membranes in closed environment according to claim 1, wherein the air draft device is an air draft fan (22), and the molecular membranes (21) and the air draft fan (22) both form a part of the gas exchanger (2);
the air inlet of the closed environment (1) is positioned above the air outlet;
the lower end of the gas exchanger (2) is hermetically arranged at an exhaust port of the closed environment (1) through an installation part (4);
the upper end of the gas exchanger (2) is hermetically connected with one end of the gas supply pipe (3), and the other end of the gas supply pipe (3) is hermetically arranged at a gas inlet of a closed environment;
the exhaust fan (22) is arranged between the molecular membrane (21) and the air supply pipe (3).
3. The method for gas exchange and filtration with molecular membranes in closed environment according to claim 2, wherein said gas exchanger (2) further comprises a cleaning fan (23), said cleaning fan (23) being arranged outside the bottom of said molecular membrane (21);
the cleaning fan (23) is used for cleaning the outer wall in the gas exchange process of the gas exchanger (2) and blowing out a little of residual dirt which is filtered out by the molecular membrane (21) and is attached to the outer wall of the molecular membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110273941.2A CN113041801A (en) | 2021-03-15 | 2021-03-15 | Method for gas exchange and filtration by applying molecular membrane in closed environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110273941.2A CN113041801A (en) | 2021-03-15 | 2021-03-15 | Method for gas exchange and filtration by applying molecular membrane in closed environment |
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| Publication Number | Publication Date |
|---|---|
| CN113041801A true CN113041801A (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110273941.2A Pending CN113041801A (en) | 2021-03-15 | 2021-03-15 | Method for gas exchange and filtration by applying molecular membrane in closed environment |
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| Country | Link |
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| CN (1) | CN113041801A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8801629D0 (en) * | 1988-01-26 | 1988-02-24 | Sabre Safety Ltd | Respiratory protective apparatus |
| WO2003042432A1 (en) * | 2001-11-13 | 2003-05-22 | Van Horne William J | Device and method for exchanging oxygen and carbon dioxide between a gas and an aqueous liquid |
| WO2004049783A1 (en) * | 2002-11-29 | 2004-06-17 | C.R.F. Societa' Consortile Per Azioni | Greenhouse and method of cultivation under glass |
| CN2626263Y (en) * | 2003-05-28 | 2004-07-21 | 唐山钢铁集团有限责任公司 | Protective clothing |
| CN102753211A (en) * | 2010-02-15 | 2012-10-24 | 尼普洛株式会社 | Heat exchanger and heat exchanger-integrated artificial lung |
| CN205626596U (en) * | 2016-04-05 | 2016-10-12 | 裴嘉阳 | Diaphragm type oxygen exchange device |
| CN106665370A (en) * | 2015-11-06 | 2017-05-17 | 张家铭 | Environment cleaning system for animal raising house |
-
2021
- 2021-03-15 CN CN202110273941.2A patent/CN113041801A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8801629D0 (en) * | 1988-01-26 | 1988-02-24 | Sabre Safety Ltd | Respiratory protective apparatus |
| WO2003042432A1 (en) * | 2001-11-13 | 2003-05-22 | Van Horne William J | Device and method for exchanging oxygen and carbon dioxide between a gas and an aqueous liquid |
| WO2004049783A1 (en) * | 2002-11-29 | 2004-06-17 | C.R.F. Societa' Consortile Per Azioni | Greenhouse and method of cultivation under glass |
| CN2626263Y (en) * | 2003-05-28 | 2004-07-21 | 唐山钢铁集团有限责任公司 | Protective clothing |
| CN102753211A (en) * | 2010-02-15 | 2012-10-24 | 尼普洛株式会社 | Heat exchanger and heat exchanger-integrated artificial lung |
| CN106665370A (en) * | 2015-11-06 | 2017-05-17 | 张家铭 | Environment cleaning system for animal raising house |
| CN205626596U (en) * | 2016-04-05 | 2016-10-12 | 裴嘉阳 | Diaphragm type oxygen exchange device |
Non-Patent Citations (1)
| Title |
|---|
| 陈志远等, 机械工业出版社 * |
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Application publication date: 20210629 |
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