CN214009469U

CN214009469U - Plasma driving catalyst equipment for air disinfection and purification

Info

Publication number: CN214009469U
Application number: CN202022573522.4U
Authority: CN
Inventors: 不公告发明人
Original assignee: Chongqing Duoarc Technology Co ltd
Current assignee: Chongqing Duoarc Technology Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-08-20
Anticipated expiration: 2030-11-10

Abstract

The utility model relates to an air treatment equipment field specifically is a plasma drive catalyst equipment for air disinfection purifies, including casing, an electric fan, a directional air divertor, a prefilter and the inside plasma reactor that is equipped with the catalyst that has air inlet and air outlet. The equipment has the synergistic effect of plasma and catalyst, and has the advantages of high air sterilizing capacity, high air purifying effect, low power consumption, no toxic side product, etc. The combination of the plasma and the catalyst can enhance the generation of new active substances, increase the oxidation capability of plasma discharge, further effectively remove air pollutants and eliminate toxic byproducts by activating the catalyst, and can be widely used for improving the indoor air quality in household and industrial environments.

Description

Plasma driving catalyst equipment for air disinfection and purification

Technical Field

The utility model relates to an air treatment equipment field specifically is a plasma drive catalyst equipment for air disinfection purifies for improve the indoor air quality in family and the industrial environment.

Background

According to research, urban residents spend approximately 80% of the day in indoor environments, such as homes, offices, movie theaters, restaurants, shopping malls, and other semi-enclosed spaces. The air quality of these semi-enclosed spaces may be degraded by various sources of indoor air pollution such as smoking, cooking fumes, wallpaper glue, rolls, burning oil heaters, smoke, PM2.5, etc. These contaminants can be a serious health hazard to humans, and proper indoor air quality can be maintained by ventilation, but indoor air pollution cannot be alleviated if outdoor air quality is poor or if indoor ventilation capacity is lacking.

A plasma is a gas with ionized molecules, which contain many components, such as electrons, positive and negative ions, and neutral particles with different energies. Many studies have shown that plasma is attractive for the removal of NOx, SOx, odors and VOCs. Among the various types of plasma, non-thermal plasma is an effective technique for decomposing VOCs and other air pollutants. Non-thermal plasmas have some unique properties, such as fast response at ambient temperature and atmospheric pressure, high electron energy can be obtained with short residence times, and are easy to operate. In addition, a plasma discharge mode similar to an electrostatic precipitator can be used to collect dust and liquid droplets. The use of plasma for VOC abatement still has the disadvantages of incomplete oxidation, emission of harmful compounds (CO, NOx, other VOCs), low energy efficiency and low mineralization. Incomplete oxidation results in the formation of toxic by-products, such as carbon monoxide, ozone and aerosol particles, and even increases gas toxicity. The formation of these byproducts requires additional post-treatment systems, which increases the cost and complexity of the overall air purification system. Therefore, there is an urgent need for an air purification apparatus that can effectively remove air pollutants with low air resistance, systemization and low power consumption.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a plasma-driven catalyst device for air sterilization and purification, which is used to improve the indoor air quality in the home and industrial environments.

The utility model provides a following technical scheme:

a plasma-driven catalyst device for air disinfection and purification, comprising a housing having an air inlet and an air outlet, an electric fan, a directional air deflector, a pre-filter, and a plasma reactor with catalyst therein, said housing enclosing said electric fan, said directional air deflector, said pre-filter, and said plasma reactor. The electric fan may generate an air flow, the directional air deflector may specify a flow direction of the air flow, the pre-filter may remove air particles, and the plasma reactor may generate plasma for sterilizing and purifying air.

Preferably, the plasma reactor comprises at least two spaced plasma electrodes for generating a plasma in a plasma region between the electrodes by means of an alternating voltage; at least one insulating dielectric barrier layer; at least one photocatalyst layer; at least one air inlet and air outlet for passing air through the plasma.

Preferably, the dielectric barrier layer is formed on the electrode, and the photocatalyst layer is deposited on the dielectric barrier layer, the photocatalyst layer being located on the surface of the plasma.

Preferably, said electrodes are made of an electrically conductive material, in the form of a rod, tube, foil, film, plate or mesh, the distance between two of said electrodes being in the range 1mm to 100mm, said electrodes being separated by said dielectric barriers, which barriers can be attached to said electrodes or interposed between two of said electrodes; the dielectric barrier layer can be made of ceramic, quartz or glass.

Preferably, the photocatalyst layer contains TiO₂，TiO₂The catalyst can also be doped with other elements, such as Ti, Zn, Cu, Mn, La, Mo, W, V, Se, Ba, Ce, Sn, Fe, Mg, Au, Pt, Co, Ni and Pd, so as to enhance the photocatalytic performance of the catalyst.

Preferably, the plasma reactor further comprises an alternating current power supply connected to at least two of the electrodes to provide an alternating voltage, the alternating current power supply providing a frequency in the range of 0.1 to 40kHz and an alternating voltage in the range of 4 to 30 kHz.

The combination of plasma and a catalyst for air treatment has many advantages, such as higher energy efficiency, lower power consumption, higher mineralization rate and no by-product formation. This technique can be used to decompose various toxic components into CO₂And H₂To perform deep purification. Changing the plasma characteristics can enhance the generation of new active species and increase the oxidizing power of the plasma discharge. The plasma discharge also affects the performance of the catalyst, such as a change in chemical composition, an increase in surface area, or a change in catalytic structure. The catalyst in the plasma region is activated by the plasma by mechanisms including ozone, ultraviolet light, localized heating, changes in work function, activation of lattice oxygen, adsorption/desorption and direct interaction of gases, and in addition to contributing to degradation of gas contaminants in the plasma reactor, the activated catalyst can also degrade toxic by-products produced by the plasma.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of a plasma reactor according to the present invention.

Reference numerals: 1-an air inlet; 2-an air outlet; 3-a shell; 4-an electric fan; 5-a directional air deflector; 6-a pre-filter; 7-a plasma reactor; 8-an electrode; 9-a dielectric barrier layer; 10-a photocatalyst layer; 11-an alternating current power supply; 12-plasma.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

The plasma driving catalyst equipment for air disinfection and purification can effectively remove air pollutants and improve indoor air quality. The apparatus comprises a pre-filter 6, an electric fan 4 and a plasma reactor 7 in which a catalyst is contained. The plasma reactor 7 is based on a dielectric barrier 9 discharge (DBD) plasma 12, which plasma 12 comprises two parallel spaced electrodes 8 and one or two dielectric barriers 9. The electrodes 8 are made of an electrically conductive material and may be in the form of rods, tubes, foils, films, plates or meshes. The distance between the two electrodes 8 ranges from 1mm to 100 mm. The electrodes 8 are separated by dielectric barriers 9, which may be connected to the electrodes 8 or interposed between two electrodes 8. The dielectric barrier layer 9 may be made of ceramic, quartz, or glass.

As shown in fig. 1, in this embodiment, a plasma-driven catalyst device for air disinfection and purification specifically comprises a housing 3 having an air inlet 1 and an air outlet 2, an electric fan 4, a directional air deflector 5, a pre-filter 6 and a plasma reactor 7. The housing 3 encloses an electric fan 4, a directional air deflector 5, a pre-filter 6 and a plasma reactor 7. The electric fan 4 may generate an air flow, the directional air deflector 5 may specify the flow direction of the air flow, the pre-filter 6 may remove air particles, and the plasma reactor 7 may generate plasma for sterilizing and purifying air.

As shown in fig. 2, the plasma reactor 7 includes a pair of electrodes 8 for separating plasma, two insulating dielectric barriers 9, a photocatalyst layer 10, and an ac power supply 11, the ac power supply 11 being provided at the air inlet 1 for the intake and exhaust of gas. The electrodes 8 separating the plasma are placed parallel to each other and kept at a distance. When the current source 11 supplies a high voltage alternating current to the electrodes 8, the plasma 12 is located in the plasma region between the two electrodes 8, and the photocatalyst layer 10 is in contact with the plasma 12. When the contaminated air from the air inlet 1 passes the plasma 12 in the plasma reactor 7, the contaminated air will be purified and disinfected, the purified air being released from the air outlet 2.

Since the photocatalyst layer 10 is directly coated on the insulating dielectric barrier layer 9, the photocatalyst layer 10 can be efficiently activated by the plasma 12 in the plasma reactor 7 without additional ultraviolet irradiation to generate radicals, which can decompose the air pollutants such as VOCs into harmless substances such as water or carbon dioxide, thereby further improving the removal efficiency of the air pollutants. Since the photocatalyst layer 10 is in contact with the plasma 12, the efficiency of radical generation in such a reactive plasma environment is further improved. In addition, ozone or other harmful by-products generated from the radicals are also eliminated by the radicals.

Since the photocatalyst layer 10 is directly coated on the insulating dielectric barrier layer 9, air resistance is not generated from the photocatalyst layer 10, a high air flow condition can be sufficiently secured and the operation load of the electric fan 4 in the apparatus can be reduced. The photocatalyst layer 10 has a thickness of 10 to 500 μm, and the dielectric barrier layer 9 has a thickness of 1 to 5 mm.

The invention is suitable for improving indoor air quality in household and industrial air processing environments, such as public spaces like municipal halls and buildings, airports, train stations, smoking rooms, shopping malls, health care centers, clean manufacturing places, and the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A plasma-driven catalyst device for air disinfection and purification, comprising a housing having an air inlet and an air outlet, an electric fan, a directional air deflector, a pre-filter, and a plasma reactor with catalyst therein, said housing enclosing said electric fan, said directional air deflector, said pre-filter, and said plasma reactor.

2. A plasma-driven catalyst device for the decontamination of air by sterilisation according to claim 1, characterised in that the plasma reactor comprises at least two spaced-apart plasma electrodes for generating a plasma in the plasma region between the electrodes by means of an alternating voltage; at least one insulating dielectric barrier layer; at least one photocatalyst layer; at least one air inlet and air outlet for passing air through the plasma.

3. A plasma-driven catalyst device for the decontamination of air as claimed in claim 2, wherein said dielectric barrier is formed on said electrode, said photocatalyst layer is deposited on said dielectric barrier, and said photocatalyst layer is disposed on the surface of said plasma.

4. A plasma-driven catalyst device for the disinfection and purification of air as claimed in claim 2, wherein said electrodes are made of an electrically conductive material, in the form of rods, tubes, foils, films, plates or meshes, and the distance between two of said electrodes is in the range of 1mm to 100 mm; the dielectric barrier layer can be made of ceramic, quartz or glass.

5. A plasma-driven catalyst device for the disinfection and purification of air as claimed in claim 2, wherein said photocatalyst layer comprises TiO₂，TiO₂The catalyst can also be doped with, for example, Ti, Zn, Cu, Mn, La, Mo, W, V, Se, Ba, Ce, Sn, Fe, Mg, Au, Pt, Co, Ni, Pd, which can enhance the photocatalytic performance.

6. A plasma-driven catalyst device for the decontamination of air by sterilisation according to claim 1, characterised in that said plasma reactor further comprises an ac power supply connected to at least two of said electrodes to provide an ac voltage, said ac power supply providing a frequency in the range 0.1-40kHz and an ac voltage in the range 4-30 kHz.