CN111692668A - Air purification method and device based on corona discharge plasma - Google Patents
Air purification method and device based on corona discharge plasma Download PDFInfo
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- CN111692668A CN111692668A CN202010543361.6A CN202010543361A CN111692668A CN 111692668 A CN111692668 A CN 111692668A CN 202010543361 A CN202010543361 A CN 202010543361A CN 111692668 A CN111692668 A CN 111692668A
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- 238000004887 air purification Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 53
- 239000002184 metal Substances 0.000 claims abstract description 53
- 238000000746 purification Methods 0.000 claims abstract description 46
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 37
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002245 particle Substances 0.000 claims abstract description 23
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
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Classifications
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultraviolet radiation
- A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
-
- 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
- B01D53/007—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 irradiation
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
- B01D53/8675—Ozone
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/47—Generating plasma using corona discharges
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/48—Generating plasma using an arc
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention belongs to the technical field of indoor air purification, and discloses an air purification method and device based on corona discharge plasma, wherein the method comprises the following steps: controlling the air flow and the air humidity to enable the air entering the air purification equipment to meet the purification condition; high-energy particles are generated by the discharge electrode in the discharge chamber through high-voltage pulse voltage, and microorganisms are inactivated, so that secondary pollution ozone is reduced from the source; collecting charged solid particles after discharging under the action of a parallel metal collecting plate; the gas is introduced into the purification chamber by drainage, and the ozone generated in the discharge process and substances such as nitrogen oxide, VOCs and the like in the air are further purified under the action of ultraviolet light catalysis. The invention carries out secondary removal on ozone, oxynitride and VOCs in the air, well avoids secondary pollution and can realize the effect of purifying the air.
Description
Technical Field
The invention belongs to the technical field of indoor air purification, and particularly relates to an air purification method and device based on corona discharge plasma.
Background
At present, chronic diseases caused by air pollution are serious, and haze pollution in northern areas is also serious due to disordered coal heating in northern areas. In winter heating in northern areas, about 4 million tons of coal are burned every year, from the aspect of time distribution, the influence of heating is caused, the monthly average emission level of the combination of disposable particles (PM2.5) and organic carbon, black carbon and the like in autumn and winter is 1.5-4 times of that in non-heating seasons, in some cities with large using amount of bulk coal, the emission level of the pollutants in autumn and winter is higher, and the pollution emission intensity far exceeding the environmental bearing capacity is a main factor of heavy pollution of atmosphere in northern areas and peripheral areas. Although the outdoor haze problem caused by the disordered bulk coal heating is widely concerned by governments and society at present, the indoor air pollution problem caused by the coal-fired heating is not considered yet.
The currently common indoor air purification device mainly uses physical filtration. The common Filter screen can not realize that more tiny particulate matter carries out High efficiency filtration, HEPA (High efficiency particulate air Filter, High efficiency filtration) Filter screen's filtration efficiency is higher, but the windage is big, require highly to the system, and no matter be ordinary Filter screen or HEPA Filter screen, all face the High cost problem that needs to change the Filter screen, the surface easily causes virus accumulation or microorganism to breed after using for a certain time, make purifier itself also become the pollution source, indoor air quality further worsens.
The existing devices for air purification by plasma on the market can not control the secondary air pollution caused in the discharging process, such as the ozone problem, although the discharge reaches the national standard, the very small amount of ozone can cause permanent damage under the condition of long-term contact, and the ozone is difficult to be accepted by people with sensitive smell.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an air purification method and device based on corona discharge plasma, and aims to solve the problems that in the prior art, the air purification is realized by adopting a filter screen for filtration, so that the filter screen is used for a long time to cause virus accumulation or microorganism breeding, and secondary pollution caused in the discharge process cannot be controlled in a plasma type purification device.
The invention provides an air purification method based on corona discharge plasma, which comprises the following steps:
controlling the air flow and the air humidity to enable the air entering the air purification equipment to meet the purification condition;
high-energy particles are generated by the discharge electrode in the discharge chamber through high-voltage pulse voltage, and microorganisms are inactivated, so that secondary pollution ozone is reduced from the source;
collecting charged solid particles after discharging under the action of a parallel metal collecting plate;
the gas is introduced into the purification chamber through gas drainage, and secondary purification treatment is carried out on ozone generated in the discharging process and substances such as nitrogen oxides, VOCs and the like in the air under the action of ultraviolet light catalysis, so that air purification is realized.
The invention also provides an air purification device based on corona discharge plasma, comprising: the device comprises a pretreatment module, a purification module and a post-treatment module; the pretreatment module is used for pretreating the entering air so that the air is in a wet state; the purification module is used for inactivating microorganisms in the air in the humid state through plasma and collecting fine particles in the air; the post-processing module is used for carrying out secondary purification on the air passing through the purification module, and the air purification is realized after ozone, oxynitride and VOCs pollutants in the air are removed.
Still further, the pre-processing module includes: the air humidifier comprises an air suction pump, a humidity detection sensor and an air humidifier, wherein the air suction pump is used for absorbing indoor air into the purification device; the humidity detection sensor is positioned in the circulation channel of the gas absorbed by the air suction pump and is used for detecting the humidity of the absorbed gas; the water vapor inlet of the air humidifier is positioned at the same side of the air flow channel in the air suction pump and is close to the channel opening, and the air humidifier is used for humidifying drier air.
Still further, the purification module comprises: a discharge electrode and a collecting plate; the discharge electrode is used for releasing plasma and inactivating microorganisms in the humid air by adopting the plasma; the collecting plate is used for collecting fine particles in the air.
Further, the discharge electrode includes: the first metal rod, the metal spring and the silver-plated carbon nanotube stranded wire; the silver-plated carbon nanotube stranded wire is connected with the first metal rod through the metal spring; the collecting plate includes: the metal plate comprises a plurality of first metal plates which are parallel to each other and are arranged, a plurality of second metal plates which are respectively staggered and parallel to the first metal plates, a second metal rod for connecting the plurality of first metal plates in series, and a third metal rod for connecting the plurality of second metal plates in series.
Still further, the processing module includes: the catalyst layer is used for catalyzing the decomposition of ozone, nitrogen oxides and VOCs; the ultraviolet lamp tube array is used for accelerating the catalysis process, so that the decomposition efficiency of substances such as ozone and the like is maximized.
Further, the catalyst layer is made of a catalyst which is honeycomb-shaped or is filled with a granular catalyst CuOMnO2/TiO2 or is supported in a stainless steel or aluminum net.
Further, the air cleaning apparatus further includes: and the drainage unit is arranged between the purification module and the post-treatment module and used for draining the air passing through the purification module into the post-treatment module.
The drainage unit can be a fan, and under the irradiation of ultraviolet light, ozone, nitrogen oxides and VOCs (volatile organic compounds) generated in the air are further decomposed under the irradiation of ultraviolet light and the action of a catalyst CuOMnO2/TiO2 through the drainage effect of the fan.
The invention also provides a method for realizing air purification based on the air purification device, which comprises the following steps:
s1, introducing air into the air chamber and controlling the air flow rate as required by the air pump;
s2, collecting air humidity information and judging whether the air humidity reaches a set threshold value, if so, entering a step S4; if not, go to step S3;
s3 changing the humidity of the air by humidification processing so that the air is humidified;
s4, the humid air enters the discharge chamber to be purified by the high-energy particles, and the dust particles are charged;
s5 collecting the charged dust particles by a dust collecting plate;
s6, performing secondary purification treatment on the air through the photocatalyst catalysis chamber to remove pollutants such as ozone, oxynitride and VOCs;
the S7 purified air is released into the indoor environment through the exhaust port.
According to the invention, a filter screen is not needed, and on the basis of the traditional plasma purification device, a humidity detector is arranged at the air inlet to control the humidity of the gas entering the discharge chamber, so that the ozone generated in the discharge process is minimized; the discharge structure material is optimized, and compared with the traditional metal discharge filament, the silver-plated carbon nanotube material can generate a large amount of high-energy particles and active substances to inactivate microorganisms and collect particulate matters; and set up catalytic purification's module before the gas outlet, carry out secondary getting rid of to ozone, oxynitride and VOCs of air, carried out fine evasion to secondary pollution, can realize air-purifying's effect simultaneously, compare with traditional air purification device and need not to change therefore the cost is lower, can convenient safe use at home.
Drawings
FIG. 1 is a schematic block diagram of an air purification apparatus based on corona discharge plasma provided by an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a main body of an air purification device based on corona discharge plasma provided by an embodiment of the invention;
fig. 3 is a flowchart of an embodiment of the present invention, which provides an air purification method based on corona discharge plasma.
Wherein, 1 is the preliminary treatment module, 11 is the air suction pump, 12 is the temperature detection sensor, 13 is the air humidifier, 2 is the purification module, 21 is first metal rod, 22 is the metal spring, 23 is silver-plated carbon nanotube stranded conductor, 24 is first metal sheet, 25 is the second metal sheet, 26 is the second metal rod, 27 is the third metal rod, 3 is the aftertreatment module, 31 is the catalyst layer, 32 is the ultraviolet ray fluorescent tube array, 4 is the fan, 5 is the fourth metal rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention can thoroughly solve the problem of ozone generation in the plasma air purification device in the prior art, and mainly fully solves the problem that the device for air purification by using plasma in the prior art cannot control secondary pollution caused in the discharging process from the source and the post-treatment mode, thereby ensuring that the indoor air purification device is safe and applicable.
The invention provides an air purifying device capable of purifying air and effectively controlling ozone, which comprises the following specific technical routes: the flow and the air humidity of the air entering the air purification equipment are controlled; high-energy particles generated by a discharge electrode in a discharge chamber are inactivated for microorganisms and the like through high-voltage pulse voltage, secondary pollution ozone is reduced at the source, and charged solid particles after discharge are collected under the action of a parallel metal collecting plate; the gas is introduced into the purification chamber by drainage, and ozone generated in the discharge process and substances such as nitrogen oxide, VOCs and the like in the air are further treated under the action of ultraviolet light catalysis.
The invention does not need to use a filter screen, is improved and optimized on the basis of the traditional plasma purification device, well avoids secondary pollution, can realize the air purification effect, has low manufacturing cost, does not need to replace the filter screen, has low maintenance cost and can be conveniently used at home.
The invention provides an air purification method based on corona discharge plasma, which comprises the following steps:
controlling the air flow and the air humidity to enable the air entering the air purification equipment to meet the purification condition;
high-energy particles are generated by the discharge electrode in the discharge chamber through high-voltage pulse voltage, and microorganisms are inactivated, so that secondary pollution ozone is reduced from the source;
collecting charged solid particles after discharging under the action of a parallel metal collecting plate;
the gas is introduced into the purification chamber through gas drainage, and secondary purification treatment is carried out on ozone generated in the discharging process and substances such as nitrogen oxides, VOCs and the like in the air under the action of ultraviolet light catalysis, so that air purification is realized.
Fig. 1 shows a schematic block diagram of an air purification apparatus based on corona discharge plasma according to an embodiment of the present invention, fig. 2 shows a main structure of the air purification apparatus based on corona discharge plasma according to an embodiment of the present invention, and only the parts related to the embodiment of the present invention are shown for convenience of description, and the following details are described below:
the air purification device based on corona discharge plasma comprises: the air purification device comprises a pretreatment module 1, a purification module 2 and a post-treatment module 3, wherein the pretreatment module 1 is used for pretreating air entering the air evolution device so that the air reaching the purification module is in a wet state; the purification module 2 is used for inactivating microorganisms such as bacteria in the air through plasma and collecting fine particles in the air; the post-treatment module 3 is used for removing pollutants such as ozone, nitrogen oxides, VOCs and the like in the air after passing through the purification module 2.
Wherein, preprocessing module 1 includes: the air humidifier comprises an air suction pump 11, a humidity detection sensor 12 and an air humidifier 13, wherein the air suction pump 11 is located at the most front end and is used for sucking indoor air into the purification device; the humidity detection sensor 12 is located in the flow channel of the gas absorbed by the suction pump, and is used for detecting the humidity of the gas which is absorbed by the suction pump and is about to enter the purification module; the water vapor inlet of the air humidifier 13 is located on the same side as the air flow passage in the air suction pump and is adjacent to the passage port for humidifying the drier air.
In the embodiment of the present invention, the air suction pump 11 is power-adjustable, and can adjust the flow rate of the air entering the latter portions according to the power, the air entering the channel flow passes through the humidity detection sensor 12 first, the air humidity of the air entering the air channel through the suction pump is detected in real time, and the detection result is transmitted to the air humidifier 13, when the air humidity is greater than 30% and less than 50%, the air humidifier 13 starts to operate, the air humidifier 13 can operate according to the power level of the air humidity measured by the humidity sensor, and when the air humidity is less than 30%, the humidifier is in a high-power operation mode, so as to provide more water vapor, and ensure that the air humidity reaches the wet state of the set threshold.
The reason why the humidity threshold is set to 50% in the present invention is that the air humidity significantly affects the ozone production in the discharge device, and it can be known from the research results that the concentration of ozone generated when the air humidity is high is low, but the introduction of other by-products is generated when the humidity is too high.
The purification module 2 includes: a discharge electrode and a collecting plate; the discharge electrode is used for releasing plasma and inactivating microorganisms in the humid air by adopting the plasma; the collecting plate is used for collecting fine particles in the air.
Wherein, the discharge electrode includes: a first metal bar 21, a metal spring 22 and a silver-plated carbon nanotube strand 23; the silver-plated carbon nanotube stranded wire 23 is connected with the first metal rod 21 through the metal spring 22; the collecting plate includes: a plurality of first metal plates 24 arranged in parallel with each other and a plurality of second metal plates 25 arranged in parallel with the first metal plates 24 in a staggered manner, respectively, second metal rods 26 for connecting the plurality of first metal plates 24 in series, and third metal rods 27 for connecting the plurality of second metal plates 25 in series.
In the purification module 2, plasma is generated by high-voltage discharge, specifically: in the discharging stage, a pulse power supply with the voltage of 8 kV-10 kV and the frequency of kHz is used for applying high frequency and high voltage to the metal rod 5, a large amount of high-energy particles are generated in a chamber of the purification module 2, and due to the adoption of a silver-plated carbon nano tube stranded wire material and humidification treatment on air, the content of ozone generated in the stage is obviously reduced, meanwhile, the generated high-energy particles inactivate microorganisms in the air, and meanwhile, fine particles in the air are charged with charges; in the collecting phase, a high voltage is applied to the first metal plate 24 and the second metal bar 26 by a high voltage power supply and grounded to the second metal plate 25 and the third metal bar 27, and the collecting plate can capture solid particulate contaminants charged by the discharge electrodes when energized.
Air after purification module 2 passes through drainage unit drainage entering aftertreatment module 3, aftertreatment module 3 includes: the catalyst layer 31 and the ultraviolet light tube array 32 are honeycomb-shaped or made by filling or loading granular catalyst CuOMnO2/TiO2 in stainless steel and aluminum nets, and the catalyst layer 31 is used for catalyzing the decomposition of ozone, oxynitride and VOCs; the uv lamp array 32 is used to accelerate the catalytic process and maximize the efficiency of the decomposition of ozone and the like.
The drainage unit can be a fan 4, and under the irradiation of ultraviolet light, ozone, nitrogen oxides and VOCs (volatile organic compounds) generated in the air are further decomposed under the irradiation of ultraviolet light and the action of a catalyst CuOMnO2/TiO2 through the drainage function of the fan 4.
Fig. 3 shows a specific implementation flow of the method for implementing the purification by the corona discharge plasma-based air purification device according to the embodiment of the present invention, specifically:
s1, introducing air into the air chamber and controlling the air flow rate as required by the air pump; wherein the air can be introduced into the air chamber by controlling the amount of air flow as required by an air pump.
S2, collecting air humidity information and judging whether the air humidity reaches a set threshold value, if so, entering a step S4; if not, go to step S3; wherein, the air humidity information can be collected by a humidity sensor, and the threshold value is set to 50% -80%.
S3 changing the humidity of the air by humidification processing so that the air is humidified; wherein, the humidifying treatment can be realized by adjusting the working power of the humidifier.
S4, the humid air enters the discharge chamber to be purified by the high-energy particles, and the dust particles are charged;
s5 collecting the charged dust particles by a dust collecting plate;
s6, performing secondary purification treatment on the air through the photocatalyst catalysis chamber to remove pollutants such as ozone, oxynitride and VOCs;
the S7 purified air is released into the indoor environment through the exhaust port.
This embodiment fully considers winter indoor dry and because the fire coal of unordered coal handles the indoor haze problem that causes, adopt the preprocessing module, purify module and the three purifier of aftertreatment module, combination through functional module, can handle the air that contains tiny particulate matter, fully solve indoor haze air pollution's problem, to inactivating the processing with microorganism etc. in purifying the cavity, the while is in the production of secondary pollution such as the effectual control ozone of in-process of handling, and carry out degradation to oxynitrides and volatile organic compounds. The device is convenient and simple to use, does not need to frequently replace parts, is safe and reliable, and can effectively purify the air.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An air purification method based on corona discharge plasma is characterized by comprising the following steps:
controlling the air flow and the air humidity to enable the air entering the air purification equipment to meet the purification condition;
high-energy particles are generated by the discharge electrode in the discharge chamber through high-voltage pulse voltage, and microorganisms are inactivated, so that secondary pollution ozone is reduced from the source;
collecting charged solid particles after discharging under the action of a parallel metal collecting plate;
the gas is introduced into the purification chamber through gas drainage, and secondary purification treatment is carried out on substances such as ozone, oxynitride in air, VOCs and the like generated in the discharging process under the action of ultraviolet light catalysis, so that air purification is realized.
2. An air purification device based on corona discharge plasma, comprising: the device comprises a pretreatment module (1), a purification module (2) and a post-treatment module (3);
the pretreatment module (1) is used for pretreating the entering air so that the air is in a wet state;
the purification module (2) is used for inactivating microorganisms in the air in a wet state through plasma and collecting fine particles in the air;
the post-processing module (3) is used for carrying out secondary purification on the air passing through the purification module (2) and removing ozone, oxynitride and VOCs pollutants in the air to realize air purification.
3. Air cleaning device according to claim 2, characterized in that the pre-treatment module (1) comprises: an air suction pump (11), a humidity detection sensor (12) and an air humidifier (13),
the air suction pump (11) is used for absorbing indoor air into the purification device;
the humidity detection sensor (12) is positioned in a flow channel of the gas absorbed by the air suction pump (11) and is used for detecting the humidity of the absorbed gas;
the water vapor inlet of the air humidifier (13) is positioned at the same side of the air flow channel in the air suction pump (11) and is close to the channel opening, and the water vapor inlet is used for humidifying the drier air.
4. Air cleaning device according to claim 2 or 3, characterized in that the cleaning module (2) comprises: a discharge electrode and a collecting plate;
the discharge electrode is used for releasing plasma and inactivating microorganisms in the air in the humid state by adopting the plasma;
the collecting plate is used for collecting fine particles in the air.
5. The air cleaning apparatus according to claim 4, wherein the discharge electrode comprises: a first metal bar (21), a metal spring (22) and a silver-plated carbon nanotube stranded wire (23); the silver-plated carbon nanotube stranded wire (23) is connected with the first metal rod (21) through the metal spring (22);
the collecting plate includes: the metal plate comprises a plurality of first metal plates (24) which are parallel to each other and are arranged in an array mode, a plurality of second metal plates (25) which are respectively arranged in parallel with the first metal plates (24) in a staggered mode, second metal rods (26) used for connecting the plurality of first metal plates (24) in series, and third metal rods (27) used for connecting the plurality of second metal plates (25) in series.
6. Air cleaning device according to any of claims 1-5, characterized in that the processing module (3) comprises: a catalyst layer (31) and an ultraviolet light tube array (32),
the catalyst layer (31) is used for catalyzing the decomposition of ozone, nitrogen oxides and VOCs;
the ultraviolet light tube array (32) is used for accelerating the catalysis process, so that the decomposition efficiency of substances such as ozone is maximized.
7. Air cleaning device according to claim 6, characterized in that the catalyst layer (31) is made of a stainless steel, aluminum mesh packed or supported in a honeycomb shape or by a particulate catalyst CuOMnO2/TiO 2.
8. The air cleaning apparatus according to any one of claims 1 to 7, further comprising: and the drainage unit is arranged between the purification module (2) and the post-treatment module (3) and used for draining the air passing through the purification module (2) into the post-treatment module (3).
9. The air purification apparatus according to claim 8, wherein the diversion unit is a fan (4), and ozone, nitrogen oxides and VOCs generated in the air are further decomposed under the irradiation of ultraviolet light and the action of a catalyst CuOMnO2/TiO2 under the irradiation of ultraviolet light by the diversion function of the fan (4).
10. A method for realizing air purification based on the air purification device as claimed in any one of claims 2-9, which is characterized by comprising the following steps:
s1, introducing air into the air chamber and controlling the air flow rate as required by the air pump;
s2, collecting air humidity information and judging whether the air humidity reaches a set threshold value, if so, entering a step S4; if not, go to step S3;
s3 changing the humidity of the air by humidification processing so that the air is humidified;
s4, the humid air enters the discharge chamber to be purified by the high-energy particles, and the dust particles are charged;
s5 collecting the charged dust particles by a dust collecting plate;
s6, performing secondary purification treatment on the air through the photocatalyst catalysis chamber to remove pollutants such as ozone, oxynitride and VOCs;
the S7 purified air is released into the indoor environment through the exhaust port.
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| CN113175730A (en) * | 2021-04-23 | 2021-07-27 | 中国科学院深圳先进技术研究院 | Air purification system and method |
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