CN113694723A - Open space-based atmospheric pollution treatment method - Google Patents
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Abstract
The invention discloses an open space-based atmospheric pollution treatment method, which comprises the following steps: the following step, S1: treatment technical analysis: s11: and (3) technical analysis of particulate matter treatment: the method adopts a mode of combining electrostatic dust removal and negative ion dust removal to cooperatively treat particulate pollution in a key area; whether the spraying dust suppression is continued or stopped on the other street can be freely selected, the effects of adsorption, condensation and sedimentation can be achieved, and the street lamp dust suppression device is arranged below street lamps of the street and can suppress dust from top to bottom. The method for treating the atmospheric pollution based on the open space is provided with a purification system, and the atmospheric pollutant is purified by a mode of using electrostatic dust removal and negative ion dust removal combination through particulate matter treatment, a mode of using a photocatalytic decomposition catalyst and a biological agent for catalysis and mixing ozone, and a mode of using a nano titanium dioxide photocatalyst through nitrogen oxide treatment, and then the atmospheric pollutant is collected and purified through an atomization system and a fresh air system.
Description
Technical Field
The invention relates to the technical field of open space air pollution, in particular to an open space air pollution treatment method.
Background
Air pollution mainly has ground raise dust, removal source waste gas, peripheral life source pollutant diffusion, and the removal source uses petrol and diesel oil as fuel at the road in-process of traveling, can produce and discharge a large amount of tail gases, and the main pollutant has: nitrogen oxides, fine particles, inhalable particles, carbon monoxide and VOCs have great influence on the quality of ambient air;
the device mainly comprises a purification system, an atomization system and a fresh air system, analyzes the air pollution source through particle treatment technical analysis, ozone treatment technical analysis, nitrogen oxide treatment technical analysis and atomization technical analysis, and conveniently performs air purification treatment on roads, streets and construction sites.
Therefore, we propose an open space-based atmospheric pollution abatement method so as to solve the problems set forth above.
Disclosure of Invention
The invention aims to provide an open space-based atmospheric pollution treatment method, which solves the problem that the atmospheric pollution treatment device in the current market, which is provided by the background technology, cannot well treat different types of atmospheric pollutants in the using process.
In order to achieve the purpose, the invention provides the following technical scheme: an open space-based air pollution treatment method comprises the following steps: the following steps are carried out,
s1: treatment technical analysis:
s11: and (3) technical analysis of particulate matter treatment:
the method adopts a mode of combining electrostatic dust removal and negative ion dust removal to cooperatively treat particulate pollution in a key area;
s12: ozone treatment technical analysis: the ozone photocatalytic decomposition catalyst and the biological agent are adopted for catalytic mixing, so that the effect of treating and amplifying conventional VOC and microorganisms can be realized, and the effect of accelerating ozone elimination can be achieved;
s13: nitrogen oxide treatment technical analysis:
treating nitrogen oxide pollution in a heavy spot area by adopting a titanium dioxide photocatalyst mode;
s14: atomization technical analysis:
the lamp pole spraying dust removal is a scheme that a spraying dust removal system is installed on a lamp pole in a city, the single high-pressure spraying dust removal system can control the lamp pole in the range of 500-3000-inch flat for spraying dust removal, and intelligent spraying dust removal control is performed on each atomizing nozzle installed on different lamp poles through a host; when spraying dust fall is carried out on one street, whether to continue spraying dust fall or stop spraying dust fall on the other street can be freely selected, and the spraying dust fall work of other streets is not influenced; the high-pressure spraying dust-settling system has the advantages that the particle size of the formed water mist is 1-10 microns, so that the dust with the particle diameter of below 2.5 can be adsorbed, condensed and settled, and the high-pressure spraying dust-settling system is arranged below a street lamp and can perform dust pressing from top to bottom; in high-temperature weather, a high-pressure spraying dust-settling system is used in a city, and water is evaporated by heat, so that the effects of cooling and purifying air can be achieved;
s2: a purification system:
the particulate treatment uses a mode of combining electrostatic dust removal and negative ion dust removal, a mode of catalytically mixing ozone with a biological agent by using a photocatalytic decomposition catalyst, and a mode of using a nano titanium dioxide photocatalyst for nitrogen oxide treatment;
s3: an atomization system:
the fog drops have very small diameters, can fly in the air for a long time, and can be attached to dust and gradually fused into a whole when one fog drop touches the dust suspended in the air; when the weight of the dust suspended in the air is increased to a certain degree and the gravity of the dust is greater than the buoyancy, the dust can fall on the ground, so that the aims of removing dust and purifying air are fulfilled;
s4: fresh air system:
turbulent vortexes of various sizes exist in the atmosphere, and the comprehensive action of various turbulent vortexes enables pollutants to be gradually dispersed while moving along with wind, and the pollutants are mixed with surrounding clean air to be diluted; a fresh air channel is formed in a certain area through an equipment air supply system, and the local atmospheric turbulence motion is accelerated.
Preferably, the equipment integration multiple technologies in S2, through top fan convulsions, form the negative pressure through the pipeline in gas collection mouth position, gas collection mouth collect the removal source waste gas about 1.5m high and purify waste gas through combination purifier, will carry the clean air release of anion to the surrounding environment in through the fan after.
Preferably, in S11, electrostatic dust removal:
the air purification utilizes a high-voltage direct-current electric field to ionize gas molecules in the air to generate a large amount of electrons and ions, the electrons and the ions move towards two poles under the action of the electric field force, charged particles move towards a polar plate with opposite charges under the action of the electric field force, free ions in the air move towards the two poles under the action of the electric field, the higher the voltage is, the higher the electric field strength is, the faster the movement speed of the ions is, and after the voltage is increased to a certain value, the air ionization phenomenon is generated; after air ionization, due to chain reaction, the quantity of ions moving between electrodes is greatly increased, which shows that the high-voltage between electrodes captures attached bacterial particles, and the cell walls composed of proteins are instantaneously conductively punctured, so that the aims of killing bacteria, adsorbing and removing dust are achieved;
negative ion dedusting: the negative ion generator is used for overvoltage and current limiting through the pulse type circuit after the input direct current or alternating current is processed by the EMI processing circuit and the lightning stroke protection circuit; the high-low voltage isolation circuit is raised to alternating current high voltage, then obtains pure direct current negative high voltage after the rectification filtering through special grade electronic material, is connected to the release pointed end of metal or carbon element preparation with direct current negative high voltage, utilizes pointed end direct current high voltage to produce high corona, emits a large amount of electrons at a high speed, and the electron can't exist in the air for a long time, can be caught by the oxygen molecule in the air at once to generate air anion.
Preferably, the photocatalytic decomposition catalyst in S12:
in the indoor air treatment process, such as microbial treatment, an ultraviolet irradiation method is often introduced, and an ultraviolet irradiation system is also arranged in a common commercial air purifier, and a photocatalyst is introduced, so that the effects of treating and amplifying conventional VOC and microbes can be realized, and the effect of accelerating ozone elimination can be achieved, therefore, the photocatalyst occupies a certain proportion in the ozone pollution treatment in the air.
Preferably, the nano titanium dioxide photocatalyst in S13:
OH and HO radicals play a very important role in the oxidation of NOx; o is2Is a trapping agent for semiconductor conduction band photoinduced electrons, can effectively prevent the recombination of electrons and holes, and simultaneously has O2Various active free radicals generated by trapping electricity have certain promotion effect in the photocatalysis process; the nanometer titanium dioxide is fixed on the molecular sieve, which can improve the dispersion degree of the catalyst and prolong the service life of the catalyst, the molecular sieve has a certain adsorption effect on NO-and can improve the catalytic efficiency, and the molecular sieve is modified to improve the selectivity of the molecular sieve, so that the NO-is decomposed into N to the maximum extent2And O2。
Preferably, in S14: the 24-hour spray dust settling and high-pressure spray dust removal system is required, the required electric quantity is 200W and the required water quantity is 48L for each hundred square meters of spray dust settling, and compared with the traditional dust settling scheme, the purposes of saving energy and reducing cost can be achieved.
Compared with the prior art, the invention has the beneficial effects that: the method for treating the atmospheric pollution based on the open space comprises the following steps:
(1) the device is provided with a purification system, and the atmospheric pollutants are purified by a mode of combining electrostatic dust removal and negative ion dust removal for particulate treatment, a mode of catalytically mixing ozone with a biological agent by using a photocatalytic decomposition catalyst and a mode of catalytically mixing nitrogen oxide with a nano titanium dioxide photocatalyst, and then are collected and purified by an atomization system and a fresh air system;
(2) be provided with the new trend system, through the influence of wind direction, wind speed, air current temperature distribution, atmospheric stability meteorological condition and topography condition, and then make the pollutant scatter gradually at the same time that removes along with the wind, mix and dilute with clean air on every side mutually to reached and formed new trend passageway in certain area for local atmospheric turbulence motion.
Drawings
FIG. 1 is a schematic flow diagram of a purification system of the present invention;
FIG. 2 is a schematic view of the working principle of the purification main unit of the present invention
FIG. 3 is a schematic view of a tail gas collection and treatment system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1-3, the present invention provides a technical solution: an open space-based atmospheric pollution treatment method comprises the following steps:
s1: treatment technical analysis:
s11: and (3) technical analysis of particulate matter treatment:
the method adopts a mode of combining electrostatic dust removal and negative ion dust removal to cooperatively treat particulate pollution in a key area;
s12: ozone treatment technical analysis: the ozone photocatalytic decomposition catalyst and the biological agent are adopted for catalytic mixing, so that the effect of treating and amplifying conventional VOC and microorganisms can be realized, and the effect of accelerating ozone elimination can be achieved;
s13: nitrogen oxide treatment technical analysis:
treating nitrogen oxide pollution in a heavy spot area by adopting a titanium dioxide photocatalyst mode;
s14: atomization technical analysis:
the lamp pole spraying dust removal is a scheme that a spraying dust removal system is installed on a lamp pole in a city, the single high-pressure spraying dust removal system can control the lamp pole in the range of 500-3000-inch flat for spraying dust removal, and intelligent spraying dust removal control is performed on each atomizing nozzle installed on different lamp poles through a host; when spraying dust fall is carried out on one street, whether to continue spraying dust fall or stop spraying dust fall on the other street can be freely selected, and the spraying dust fall work of other streets is not influenced; the high-pressure spraying dust-settling system has the advantages that the particle size of the formed water mist is 1-10 microns, so that the dust with the particle diameter of below 2.5 can be adsorbed, condensed and settled, and the high-pressure spraying dust-settling system is arranged below a street lamp and can perform dust pressing from top to bottom; in high-temperature weather, a high-pressure spraying dust-settling system is used in a city, and water is evaporated by heat, so that the effects of cooling and purifying air can be achieved;
s2: a purification system:
the particulate treatment uses a mode of combining electrostatic dust removal and negative ion dust removal, a mode of catalytically mixing ozone with a biological agent by using a photocatalytic decomposition catalyst, and a mode of using a nano titanium dioxide photocatalyst for nitrogen oxide treatment;
s3: an atomization system:
the fog drops have very small diameters, can fly in the air for a long time, and can be attached to dust and gradually fused into a whole when one fog drop touches the dust suspended in the air; when the weight of the dust suspended in the air is increased to a certain degree and the gravity of the dust is greater than the buoyancy, the dust can fall on the ground, so that the aims of removing dust and purifying air are fulfilled;
s4: fresh air system:
turbulent vortexes of various sizes exist in the atmosphere, and the comprehensive action of various turbulent vortexes enables pollutants to be gradually dispersed while moving along with wind, and the pollutants are mixed with surrounding clean air to be diluted; a fresh air channel is formed in a certain area through an equipment air supply system, and the local atmospheric turbulence motion is accelerated.
S2, integrating multiple technologies, performing air suction through a top fan, forming negative pressure at a gas collection port through a pipeline, collecting waste gas of a mobile source with the height of about 1.5m at the gas collection port, purifying the waste gas through a combined purification device, and releasing clean air carrying negative ions into the surrounding environment through a fan, wherein the PM2.5 fine particles in the airflow can be removed through a high-efficiency electrostatic dust removal module; the air flow passes through a high-concentration negative ion area, particulate matters in the air flow are charged in the area, bacteria and viruses in the air flow can be killed due to the action of the high-concentration negative ions, and the content of partial VOCs in the air flow can be reduced; the ozone catalyst filter screen accelerates the oxidative decomposition of ozone in a catalytic mode; purifying VOCs and nitrogen oxides in the airflow by using a nano titanium dioxide photocatalyst; the airflow flows through the fin-shaped dust collecting area, and fine particles in the airflow are adsorbed on the dust collecting module under the driving of a powerful electric field; the treated clean gas carries negative ions to flow out of the top of the equipment through a fan; after the dirt on the surface of the nano material is accumulated to a certain thickness, cleaning the purification box by using a high-pressure water gun, drying in the air to ensure the normal work of the equipment, then installing an atomizing spray head at the air outlet of the equipment to be connected with a mist making system at the bottom of the purification equipment, feeding atomized water into a water filter from a liquid inlet pipe, filtering impurities and suspended matters in the water by the water filter, controlling, pressurizing to high pressure in a liquid pressurizing device, sending the high pressure to the atomizing spray head, directly atomizing the liquid into dry mist points with the diameter of less than 5 microns without the help of any air flow and substances, wherein the evaporation surface area is very large, when the dry and hot air is contacted, the dry and hot air is instantly evaporated, a large amount of heat is taken away in the process, and then the pollutants are gradually dispersed while moving along with the wind through the comprehensive action of various turbulent eddies existing in the atmosphere, mixing with clean air around to dilute; form the new trend passageway through equipment air supply system in certain region for local atmospheric turbulence motion, through above setting, and then the convenience purifies this atmosphere.
Electrostatic dust removal in S11:
the air purification utilizes a high-voltage direct-current electric field to ionize gas molecules in the air to generate a large amount of electrons and ions, the electrons and the ions move towards two poles under the action of the electric field force, charged particles move towards a polar plate with opposite charges under the action of the electric field force, free ions in the air move towards the two poles under the action of the electric field, the higher the voltage is, the higher the electric field strength is, the faster the movement speed of the ions is, and after the voltage is increased to a certain value, the air ionization phenomenon is generated; after air ionization, due to chain reaction, the quantity of ions moving between electrodes is greatly increased, which shows that the high-voltage between electrodes captures attached bacterial particles, and the cell walls composed of proteins are instantaneously conductively punctured, so that the aims of killing bacteria, adsorbing and removing dust are achieved;
negative ion dedusting: the negative ion generator is used for overvoltage and current limiting through the pulse type circuit after the input direct current or alternating current is processed by the EMI processing circuit and the lightning stroke protection circuit; the high-low voltage isolation circuit is raised to alternating current high voltage, then obtains pure direct current negative high voltage after the rectification filtering through special grade electronic material, is connected to the release pointed end of metal or carbon element preparation with direct current negative high voltage, utilizes pointed end direct current high voltage to produce high corona, emits a large amount of electrons at a high speed, and the electron can't exist in the air for a long time, can be caught by the oxygen molecule in the air at once to generate air anion.
When the open space-based atmospheric pollution treatment method is used, firstly, polluted air is collected in a centralized manner by a tail gas collection device and then is sucked into equipment through a pipeline, and impurities with larger sizes of leaves and plastic bags in airflow are filtered by a shutter; the air flow passes through a primary filter screen (a nano electrostatic electret filter material) to filter lint and large dust in the air flow; the high-efficiency electrostatic dust removal module can remove PM2.5 fine particles in the airflow; the air flow passes through a high-concentration negative ion area, particulate matters in the air flow are charged in the area, bacteria and viruses in the air flow can be killed due to the action of the high-concentration negative ions, and the content of partial VOCs in the air flow can be reduced; the ozone catalyst filter screen accelerates the oxidative decomposition of ozone in a catalytic mode; the nanometer titanium dioxide photocatalyst purifies VOCs and nitrogen oxides in airflow.
S12 photocatalytic decomposition catalyst:
in the indoor air treatment process, such as microbial treatment, an ultraviolet irradiation method is often introduced, and an ultraviolet irradiation system is also arranged in a common commercial air purifier, and a photocatalyst is introduced, so that the effects of treating and amplifying conventional VOC and microbes can be realized, and the effect of accelerating ozone elimination can be achieved, therefore, the photocatalyst occupies a certain proportion in the ozone pollution treatment in the air.
Nano titanium dioxide photocatalyst in S13:
OH and HO radicals play a very important role in the oxidation of NOx; o is2Is a trapping agent for semiconductor conduction band photoinduced electrons, can effectively prevent the recombination of electrons and holes, and simultaneously has O2By trapping various active radicals produced by electricity inThe photocatalysis process has a certain promotion effect; the nanometer titanium dioxide is fixed on the molecular sieve, which can improve the dispersion degree of the catalyst and prolong the service life of the catalyst, the molecular sieve has a certain adsorption effect on NO-and can improve the catalytic efficiency, and the molecular sieve is modified to improve the selectivity of the molecular sieve, so that the NO-is decomposed into N to the maximum extent2And O2。
In S14: the 24-hour spray dust settling and high-pressure spray dust removal system is required, the required electric quantity is 200W and the required water quantity is 48L for each hundred square meters of spray dust settling, and compared with the traditional dust settling scheme, the purposes of saving energy and reducing cost can be achieved.
The working principle is as follows: when the open space-based atmospheric pollution treatment method is used, firstly, polluted air is collected in a centralized manner by a tail gas collection device and then is sucked into equipment through a pipeline, and impurities with larger sizes of leaves and plastic bags in airflow are filtered by a shutter; purifying VOCs and nitrogen oxides in the airflow by using a nano titanium dioxide photocatalyst; the airflow flows through the fin-shaped dust collecting area, and fine particles in the airflow are adsorbed on the dust collecting module under the driving of a powerful electric field; the treated clean gas carries negative ions to flow out of the top of the equipment through a fan; after the dirt on the surface of the nano material is accumulated to a certain thickness, the dirt can be instantly evaporated, a large amount of heat is taken away in the process, and then the dirt is gradually dispersed while moving along with wind through the turbulent vortexes with various scales existing in the atmosphere and the comprehensive action of various turbulent vortexes to be mixed with the surrounding clean air for dilution; form the new trend passageway through equipment air supply system in certain region for local atmospheric turbulence motion, through above setting, and then conveniently purify this atmosphere, thereby accomplish a series of work.
Those not described in detail in this specification are within the skill of the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. An air pollution treatment method based on an open space comprises the following steps, and is characterized in that:
s1: treatment technical analysis:
s11: and (3) technical analysis of particulate matter treatment:
the method adopts a mode of combining electrostatic dust removal and negative ion dust removal to cooperatively treat particulate pollution in a key area;
s12: ozone treatment technical analysis: the ozone photocatalytic decomposition catalyst and the biological agent are adopted for catalytic mixing, so that the effect of treating and amplifying conventional VOC and microorganisms can be realized, and the effect of accelerating ozone elimination can be achieved;
s13: nitrogen oxide treatment technical analysis:
treating nitrogen oxide pollution in a heavy spot area by adopting a titanium dioxide photocatalyst mode;
s14: atomization technical analysis:
the lamp pole spraying dust removal is a scheme that a spraying dust removal system is installed on a lamp pole in a city, the single high-pressure spraying dust removal system can control the lamp pole in the range of 500-3000-inch flat for spraying dust removal, and intelligent spraying dust removal control is performed on each atomizing nozzle installed on different lamp poles through a host; when spraying dust fall is carried out on one street, whether to continue spraying dust fall or stop spraying dust fall on the other street can be freely selected, and the spraying dust fall work of other streets is not influenced; the high-pressure spraying dust-settling system has the advantages that the particle size of the formed water mist is 1-10 microns, so that the dust with the particle diameter of below 2.5 can be adsorbed, condensed and settled, and the high-pressure spraying dust-settling system is arranged below a street lamp and can perform dust pressing from top to bottom; in high-temperature weather, a high-pressure spraying dust-settling system is used in a city, and water is evaporated by heat, so that the effects of cooling and purifying air can be achieved;
s2: a purification system:
the particulate treatment uses a mode of combining electrostatic dust removal and negative ion dust removal, a mode of catalytically mixing ozone with a biological agent by using a photocatalytic decomposition catalyst, and a mode of using a nano titanium dioxide photocatalyst for nitrogen oxide treatment;
s3: an atomization system:
the fog drops have very small diameters, can fly in the air for a long time, and can be attached to dust and gradually fused into a whole when one fog drop touches the dust suspended in the air; when the weight of the dust suspended in the air is increased to a certain degree and the gravity of the dust is greater than the buoyancy, the dust can fall on the ground, so that the aims of removing dust and purifying air are fulfilled;
s4: fresh air system:
turbulent vortexes of various sizes exist in the atmosphere, and the comprehensive action of various turbulent vortexes enables pollutants to be gradually dispersed while moving along with wind, and the pollutants are mixed with surrounding clean air to be diluted; a fresh air channel is formed in a certain area through an equipment air supply system, and the local atmospheric turbulence motion is accelerated.
2. The open space-based atmospheric pollution abatement method of claim 1, wherein: the equipment integration multiple technologies in S2, through top fan convulsions, form the negative pressure through the pipeline in gas collection mouth position, the gas collection mouth collects the removal source waste gas about 1.5m height and purifies waste gas through combination purifier, in will carrying the clean air release of anion to the surrounding environment through the fan after.
3. The open space-based atmospheric pollution abatement method of claim 1, wherein: electrostatic dust removal in the step S11:
the air purification utilizes a high-voltage direct-current electric field to ionize gas molecules in the air to generate a large amount of electrons and ions, the electrons and the ions move towards two poles under the action of the electric field force, charged particles move towards a polar plate with opposite charges under the action of the electric field force, free ions in the air move towards the two poles under the action of the electric field, the higher the voltage is, the higher the electric field strength is, the faster the movement speed of the ions is, and after the voltage is increased to a certain value, the air ionization phenomenon is generated; after air ionization, due to chain reaction, the quantity of ions moving between electrodes is greatly increased, which shows that the high-voltage between electrodes captures attached bacterial particles, and the cell walls composed of proteins are instantaneously conductively punctured, so that the aims of killing bacteria, adsorbing and removing dust are achieved;
negative ion dedusting: the negative ion generator is used for overvoltage and current limiting through the pulse type circuit after the input direct current or alternating current is processed by the EMI processing circuit and the lightning stroke protection circuit; the high-low voltage isolation circuit is raised to alternating current high voltage, then obtains pure direct current negative high voltage after the rectification filtering through special grade electronic material, is connected to the release pointed end of metal or carbon element preparation with direct current negative high voltage, utilizes pointed end direct current high voltage to produce high corona, emits a large amount of electrons at a high speed, and the electron can't exist in the air for a long time, can be caught by the oxygen molecule in the air at once to generate air anion.
4. The open space-based atmospheric pollution treatment method according to claim 1, wherein the photocatalytic decomposition catalyst in S12:
in the indoor air treatment process, such as microbial treatment, an ultraviolet irradiation method is often introduced, and an ultraviolet irradiation system is also arranged in a common commercial air purifier, and a photocatalyst is introduced, so that the effects of treating and amplifying conventional VOC and microbes can be realized, and the effect of accelerating ozone elimination can be achieved, therefore, the photocatalyst occupies a certain proportion in the ozone pollution treatment in the air.
5. The open space-based atmospheric pollution treatment method according to claim 1, wherein the nano titanium dioxide photocatalyst in S13:
OH and HO radicals play a very important role in the oxidation of NOx; o is2Is a trapping agent for semiconductor conduction band photoinduced electrons, can effectively prevent the recombination of electrons and holes, and simultaneously has O2Various active free radicals generated by trapping electricity have certain promotion effect in the photocatalysis process; the nano titanium dioxide is fixed on the molecular sieve, which can improve the catalystThe dispersity can also prolong the service life of the catalyst, the molecular sieve has a certain adsorption effect on NO-and can improve the catalytic efficiency, and the molecular sieve is modified to improve the selectivity and decompose NO-into N to the maximum extent2And O2。
6. The open space-based atmospheric pollution abatement method of claim 1, wherein in S14: the 24-hour spray dust settling and high-pressure spray dust removal system is required, the required electric quantity is 200W and the required water quantity is 48L for each hundred square meters of spray dust settling, and compared with the traditional dust settling scheme, the purposes of saving energy and reducing cost can be achieved.
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| Publication number | Priority date | Publication date | Assignee | Title |
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