CN111351157A - Low-temperature plasma recirculation air purification system and purification method - Google Patents
Low-temperature plasma recirculation air purification system and purification method Download PDFInfo
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- CN111351157A CN111351157A CN202010224550.7A CN202010224550A CN111351157A CN 111351157 A CN111351157 A CN 111351157A CN 202010224550 A CN202010224550 A CN 202010224550A CN 111351157 A CN111351157 A CN 111351157A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/117—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by ionisation
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Abstract
The invention discloses a low-temperature plasma recirculation air purification system and a purification method, wherein the purification system comprises: a sealed space which is a space to be purified; the air feeder is communicated with the air inlet of the sealed space; the low-temperature plasma purifier is arranged outside the sealed space, and the inlet of the low-temperature plasma purifier is communicated with the outlet of the sealed space through the coarse filter; and the inlet of the reduction fine filter is connected with the outlet of the low-temperature plasma purifier.
Description
Technical Field
The invention belongs to the technical field of air purification, and particularly relates to a low-temperature plasma recirculation air purification system and a low-temperature plasma recirculation air purification method.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Aiming at the strong air vector infectivity in the existing new crown epidemic situation, the hospital area becomes a disaster area, a large number of medical care personnel and other patients are infected, the regional gathering morbidity phenomenon is very clear, the normal operation of the hospital is influenced, and the shortage of medical care resources is directly caused for the area with serious epidemic situation.
The air purification of the existing medical system mostly adopts sterilization modes such as filtration and ultraviolet, and the capability of coping with aerosol viruses and novel viruses is not enough.
Traditional plasma clarifier adopts plasma can kill and get rid of pathogenic microorganism, has the effect of getting rid of to the particulate matter in the air, can use in unmanned sealed environment, also can disinfect when man-machine coexistence. However, the following problems still remain: 1) when the plasma purifier operates for a long time, the deposition of discharge dust on the discharge electrode part easily causes the problems of unstable discharge, edge discharge and the like, and has certain potential safety hazard, 2) in the plasma discharge process, ozone can be dissipated by activated ionization of air, and the health of operating personnel and the stable operation of equipment in space are harmed.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a low-temperature plasma recirculation air purification system and a purification method.
In order to solve the above technical problems, one or more embodiments of the present invention provide the following technical solutions:
in a first aspect of the present invention, there is provided a low temperature plasma recirculation air purification system comprising:
a sealed space which is a space to be purified;
the air feeder is communicated with the air inlet of the sealed space;
the low-temperature plasma purifier is arranged outside the sealed space, and the inlet of the low-temperature plasma purifier is communicated with the outlet of the sealed space through the coarse filter;
and the inlet of the reduction fine filter is connected with the outlet of the low-temperature plasma purifier.
In a second aspect of the present invention, there is provided a low temperature plasma recirculation air purification method, comprising the steps of:
conveying polluted air in the sealed space to a coarse filter, filtering to remove suspended particulate matters and impurities in the air, and meanwhile continuously introducing clean air into the sealed space through a blower;
the filtered air enters a low-temperature plasma purifier, the airflow is broken down and activated to destroy the existing aerosol, and pathogenic bacteria and viruses are denatured and inactivated under the combined action of irradiation, free radicals and superoxide ions;
the purified air enters a reduction fine filter to digest ozone and free radicals carried in the air.
Compared with the prior art, one or more technical schemes of the invention have the following beneficial effects:
the low-temperature plasma purifier is arranged outside the sealed space, and ozone and free radicals in the air after discharge purification are digested through the reduction fine filter, so that the ozone generated in the working process of the low-temperature plasma purifier can be effectively prevented from escaping, and the health of workers in the sealed space and the stable operation of equipment are guaranteed; and the air pollution to the air in the surrounding environment caused by ozone and free radicals in the purified air can be prevented when the purified air is directly discharged outside.
In the process of pumping out and purifying the air in the sealed space by the low-temperature plasma purifier, clean air is continuously supplemented into the sealed space through the induced draft fan, so that the whole replacement of the air in the sealed space is realized, and the quality of the air is ensured.
The coarse filter is arranged at the inlet of the low-temperature plasma purifier, so that particles and impurities in air entering the purifier can be filtered, the number of the particles entering the purifier is reduced, and the deposition amount of micro-dust at the discharge electrode part is reduced, so that the problems of unstable discharge, edge discharge and the like of the plasma purifier are solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic diagram of the overall structure of a low-temperature plasma recirculation air purification system according to an embodiment of the present invention.
The device comprises a blower 1, a coarse filter 2, a first discharge area 3, a second discharge area 4, a drain outlet 5, a reduction fine filter 6, a draught fan 7, an A, a first air outlet valve, a B, a first air inlet valve, a C, a second air outlet valve, a D and a second air inlet valve.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In a first aspect of the present invention, there is provided a low temperature plasma recirculation air purification system comprising:
a sealed space which is a space to be purified;
the air feeder is communicated with the air inlet of the sealed space;
the low-temperature plasma purifier is arranged outside the sealed space, and the inlet of the low-temperature plasma purifier is communicated with the outlet of the sealed space through the coarse filter;
and the inlet of the reduction fine filter is connected with the outlet of the low-temperature plasma purifier.
Traditional air purifier mode is abandoned to low temperature plasma air purification system, with actual operation space environment and clarification plant phase separation, avoids man-machine operation process to influence each other, changes two big problems of traditional plasma purifier operation in-process simultaneously: 1) long-time operation, the deposition of discharge dust at the discharge level part influences unstable discharge and has potential safety hazard on edge discharge, and 2) ozone dissipation can be caused by activated ionization of air in the plasma discharge process to harm the health of operators and the stable operation of equipment in space.
The air purification function is realized by separating two processes, air supply and induced air are combined to maintain the air pressure balance and air circulation of the operation space, an induced air port and an air supply port are arranged in the closed operation space, and the air supply port and the induced air port are matched to ensure that the operation space is always maintained at proper pressure, temperature and clean and non-toxic degree. Part of gas in the space enters an induced draft air passage through an induced draft opening, then large particles and impurities are filtered through a rough filtering part 2, then the gas flows into a low-temperature plasma discharge area, the gas flow is broken through and activated, existing aerosol is damaged, superfine particles in the gas flow are attached to the peripheral side of a plasma discharge tube through a charging process, pathogenic bacteria and viruses are irradiated by energy in the plasma discharge process and simultaneously contact with generated free radicals and superoxide ions to be broken, denatured and inactivated, VOC is activated and degraded, and then the clean gas flow clears up substances such as trace ozone and free radicals generated in the discharge process through a reduction fine filter, so that the air purification process is nontoxic and pollution-free.
In some embodiments, the coarse filter has a filtration precision of less than 1 micron.
In some embodiments, the low-temperature plasma purifier comprises a gas distribution dust collection layer, a discharge purification layer and a gas collection layer from bottom to top in sequence; the gas distribution dust collection layer is of an inverted cone-shaped cylinder structure, the lowest end of the gas distribution dust collection layer is provided with a sewage outlet, and the gas distribution dust collection layer is communicated with the outlet of the coarse filter.
The gas distribution dust collection layer has two functions, which are respectively: 1. the air distribution function is that the layer is of an inverted cone-shaped cylinder structure, namely, the layer is hollow inside, after the air to be purified after coarse filtration enters, the air is uniformly distributed in the inverted cone-shaped cylinder structure in the shortest time, and basically, the flow is uniformly and upwards flowed through each area of the cross section of the discharge purification layer, so that the utilization efficiency of the low-temperature plasma purifier can be improved, and the stable operation of the low-temperature plasma purifier can be ensured; 2. the dust collection effect, because low temperature plasma clarifier can deposit a certain amount of dust at long-time operation in-process, the dust that oneself dropped or the dust that external force washed away fall in this back taper tubular structure, collect to it is outer arranging through the drain of minimum.
Furthermore, the discharge purification layer is internally divided into two discharge areas, namely a first discharge area and a second discharge area, through a vertical partition plate, and each discharge area is internally provided with a discharge part.
Furthermore, the discharge parts are vertically arranged and uniformly distributed in the discharge area.
Furthermore, the gas collecting layer is a hollow cavity and is communicated with the discharge area. The air purified by the discharge is collected by the air collecting layer and flows out of the low-temperature plasma purifier together after being collected.
Furthermore, the gas collecting layer is divided into a first chamber and a second chamber, the first chamber is communicated with the first discharge area, and the second chamber is communicated with the second discharge area.
Still further, the end of giving vent to anger of low temperature plasma clarifier is provided with first pipeline, the second pipeline, first inlet line and the second inlet line of giving vent to anger, first pipeline and the first inlet line of giving vent to anger communicates with first cavity, the second pipeline and the second inlet line of giving vent to anger communicates with the second cavity, be provided with first valve of giving vent to anger on the first pipeline, be provided with the second valve of giving vent to anger on the second pipeline, be provided with first air inlet valve on the first inlet line, be provided with the second valve of admitting air on the second inlet line.
And furthermore, the air outlet pipeline is connected with an inlet of an induced draft fan, and an outlet of the induced draft fan is respectively connected with the air inlet pipeline and the reduction fine filter through pipelines.
After the low-temperature plasma purifier operates for a period of time, the first air outlet valve or the second air outlet valve is selectively opened, then the air inlet valve of the other chamber is opened, so that the air to be purified is purified only by one discharge area of the purifier, after the air is purified and discharged, a part of clean air flows back to the other discharge area of the purifier, the other discharge area is subjected to reverse purging, deposited dust is blown off, the airflow carrying the dust separates the dust under the action of the inertial baffle of the bottom bin, the dust is deposited at the bottom of the cabin, the air returns to the discharge area to be continuously purified, and the rest clean air enters the reduction fine filter to be filtered to remove substances such as ozone, free radicals and the like in the purified air. The air which flows back is mixed into the air to be purified, and is discharged after being treated by the discharge area.
In some embodiments, the polishing filter is a water-wet membrane.
In a second aspect of the present invention, there is provided a low temperature plasma recirculation air purification method, comprising the steps of:
conveying polluted air in the sealed space to a coarse filter, filtering to remove suspended particulate matters and impurities in the air, and meanwhile continuously introducing clean air into the sealed space through a blower;
the filtered air enters a low-temperature plasma purifier, the airflow is broken down and activated to destroy the existing aerosol, and pathogenic bacteria and viruses are denatured and inactivated under the combined action of irradiation, free radicals and superoxide ions;
the purified air enters a reduction fine filter to digest ozone and free radicals carried in the air.
In some embodiments, after the low temperature plasma purifier is operated for a period of time, a portion of the purified air is back-purged into the discharge region.
Example 1
As shown in fig. 1, a low temperature plasma recirculation air purification system includes:
a sealed space which is a space to be purified;
a blower 1 communicated with an air inlet of the sealed space;
a low-temperature plasma purifier which is arranged outside the sealed space, and the inlet of the low-temperature plasma purifier is communicated with the outlet of the sealed space through a coarse filter 2;
and the inlet of the reduction fine filter 6 is connected with the outlet of the low-temperature plasma purifier.
The low-temperature plasma purifier comprises a gas distribution dust collection layer, a discharge purification layer and a gas collection layer from bottom to top in sequence; the gas distribution dust collection layer is an inverted cone-shaped barrel structure, a flow guide filter plate is arranged inside the gas distribution dust collection layer, inertia impact and membrane filtration dust fall are achieved, the lowest end of the gas distribution dust collection layer is provided with a drain outlet 5, and the gas distribution dust collection layer is communicated with the outlet of the coarse filter 2. The interior of the discharging purification layer is divided into two discharging areas through a vertical partition board, the two discharging areas are respectively a first discharging area 3 and a second discharging area 4, a discharging component is arranged in each discharging area, and the discharging components are vertically arranged and evenly distributed in the discharging areas.
The gas collecting layer is divided into a first chamber and a second chamber, the first chamber is communicated with the first discharge area 3, and the second chamber is communicated with the second discharge area 4. The gas outlet end of the low-temperature plasma purifier is provided with a first gas outlet pipeline, a second gas outlet pipeline, a first gas inlet pipeline and a second gas inlet pipeline, the first gas outlet pipeline and the first gas inlet pipeline are communicated with the first cavity, the second gas outlet pipeline and the second gas inlet pipeline are communicated with the second cavity, the first gas outlet pipeline is provided with a first gas outlet valve A, the second gas outlet pipeline is provided with a second gas outlet valve C, the first gas inlet pipeline is provided with a first gas inlet valve B, and the second gas inlet pipeline is provided with a second gas inlet valve D.
The air outlet pipeline is connected with an inlet of the induced draft fan 7, and an outlet of the induced draft fan 7 is respectively connected with the two air inlet pipelines and the reduction fine filter 6 through pipelines.
Initially, the valve A, D is opened, the valve B, C is closed, the airflow flows upward to the overdischarge area 3 and flows into the induced draft fan 7 through the valve a, the induced draft fan discharges, one part of the airflow is discharged to the atmosphere through the reduction fine filtration component, the other part of the airflow flows back to the valve D, then the airflow flows downward to the discharge area 4 to clean the discharge area 4, and the discharge area 4 can stop discharging and continue to discharge and efficiently sterilize. And when the discharge area 4 is cleaned, closing D, opening C, closing A and opening B to clean the discharge area 3.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A low temperature plasma recirculation air purification system which characterized in that: the method comprises the following steps:
a sealed space which is a space to be purified;
the air feeder is communicated with the air inlet of the sealed space;
the low-temperature plasma purifier is arranged outside the sealed space, and the inlet of the low-temperature plasma purifier is communicated with the outlet of the sealed space through the coarse filter;
and the inlet of the reduction fine filter is connected with the outlet of the low-temperature plasma purifier.
2. The low temperature plasma recirculation air purification system of claim 1, wherein: the coarse filter has a filtration precision of less than 1 micron.
3. The low temperature plasma recirculation air purification system of claim 1, wherein: the low-temperature plasma purifier comprises a gas distribution dust collection layer, a discharge purification layer and a gas collection layer from bottom to top in sequence; the gas distribution dust collection layer is of an inverted cone-shaped cylinder structure, the lowest end of the gas distribution dust collection layer is provided with a sewage outlet, and the gas distribution dust collection layer is communicated with the outlet of the coarse filter.
4. The low temperature plasma recirculation air purification system of claim 3, wherein: the discharge purification layer is internally divided into two discharge areas, namely a first discharge area and a second discharge area, by a vertical partition plate, and each discharge area is internally provided with a discharge component;
furthermore, the discharge parts are vertically arranged and uniformly distributed in the discharge area.
5. The low temperature plasma recirculation air purification system of claim 3, wherein: the gas collecting layer is a hollow cavity and is communicated with the discharge region;
furthermore, the gas collecting layer is divided into a first chamber and a second chamber, the first chamber is communicated with the first discharge area, and the second chamber is communicated with the second discharge area.
6. The low temperature plasma recirculation air purification system of claim 5, wherein: the gas outlet end of the low-temperature plasma purifier is provided with a first gas outlet pipeline, a second gas outlet pipeline, a first gas inlet pipeline and a second gas inlet pipeline, the first gas outlet pipeline and the first gas inlet pipeline are communicated with the first cavity, the second gas outlet pipeline and the second gas inlet pipeline are communicated with the second cavity, the first gas outlet pipeline is provided with a first gas outlet valve, the second gas outlet pipeline is provided with a second gas outlet valve, the first gas inlet pipeline is provided with a first gas inlet valve, and the second gas inlet pipeline is provided with a second gas inlet valve.
7. The low temperature plasma recirculation air purification system of claim 6, wherein: the air outlet pipeline is connected with an inlet of the induced draft fan, and an outlet of the induced draft fan is respectively connected with the air inlet pipeline and the reduction fine filter through pipelines.
8. The low temperature plasma recirculation air purification system of claim 1, wherein: the reduction fine filter is a water-wet film.
9. A low-temperature plasma recirculation air purification method is characterized in that: the method comprises the following steps:
conveying polluted air in the sealed space to a coarse filter, filtering to remove suspended particulate matters and impurities in the air, and meanwhile continuously introducing clean air into the sealed space through a blower;
the filtered air enters a low-temperature plasma purifier, the airflow is broken down and activated to destroy the existing aerosol, and pathogenic bacteria and viruses are denatured and inactivated under the combined action of irradiation, free radicals and superoxide ions;
the purified air enters a reduction fine filter to digest ozone and free radicals carried in the air.
10. The low temperature plasma recirculation air purification method of claim 9, wherein: and after the low-temperature plasma purifier operates for a period of time, reversely introducing a part of purified air into the discharge area for reverse purging.
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| CN113457397A (en) * | 2021-07-23 | 2021-10-01 | 北京科思研环保技术有限公司 | Industrial waste gas treatment system based on low-temperature plasma purification |
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| CN113457397B (en) * | 2021-07-23 | 2022-12-27 | 北京科思研环保技术有限公司 | Industrial waste gas treatment system based on low-temperature plasma purification |
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| CN111351157B (en) | 2021-03-30 |
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Inventor after: Wang Peng Inventor after: Wu Linan Inventor after: Cui Lin Inventor after: Chang Jingcai Inventor after: Yu Lei Inventor after: Zhang Liqiang Inventor before: Wang Peng Inventor before: Wu Linan Inventor before: Cui Lin Inventor before: Chang Jingcai Inventor before: Yu Lei Inventor before: Zhang Liqiang |
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Effective date of registration: 20230119 Address after: 250061, No. ten, No. 17923, Lixia District, Ji'nan City, Shandong Province Patentee after: SHANDONG University Patentee after: Jinan Lanxi Environmental Technology Co.,Ltd. Address before: 250061, No. ten, No. 17923, Lixia District, Ji'nan City, Shandong Province Patentee before: SHANDONG University Patentee before: Ningbo Jiuhe Environmental Protection Technology Co.,Ltd. |