CN105756750B - A kind of gas cleaning plant - Google Patents

Abstract

The invention discloses a gas purification device based on a friction generator, which adopts a flexible vibrating membrane structure and utilizes the flow of gas to disturb the flexible vibrating membrane, so that the flexible vibrating membrane vibrates and contacts and separates from the electrode unit, thereby forming The friction generator is driven to work in real time, and the formed high-voltage electric field removes the particles in the gas through electrostatic adsorption. The gas purification device of the present invention does not need a power source, and is driven by the flow energy of the airflow itself. It has the advantages of simple structure, low cost, no pollution, high adsorption efficiency and recyclable use. It is applied to the treatment of motor vehicle exhaust Among them, it can effectively absorb and filter PM1.0, PM2.5, PM5.0 and PM10.0 in the exhaust gas that cause smog.

Description

A gas purification device

technical field

The invention relates to the field of air haze prevention and control, in particular to a gas purification device based on a friction generator.

Background technique

Severe smog has occurred frequently across the country in recent years. Smog not only causes air turbidity, deterioration of visibility, and affects travel safety, but also causes respiratory infections and cardiovascular diseases, seriously endangering human health and life.

The current national methods of controlling smog are mainly in the following categories: reducing industrial waste gas and vehicle exhaust emissions, improving the quality of fuel and coal, and artificial rainfall. The government has also adopted a series of measures in response to the control of smog, such as shutting down polluting enterprises, eliminating unqualified motor vehicles, restricting motor vehicle licenses, restricting vehicles with odd and even numbers, strictly monitoring fuel quality, and spraying water mist into the sky. The problem with these governance methods is that they treat the symptoms but not the root cause, the cost is high and the effect is not obvious. A large number of business closures cause unemployment in a large area and cause immeasurable losses to the country's economic growth. Therefore, starting from the source, identifying the source of pollution and absorbing it is a more desirable path.

The main components of smog are sulfur dioxide, nitrogen oxides, and respirable particulate matter dust, among which respirable particulate matter, as the core of suspended matter, is the most critical factor in the formation of smog. If the content of inhalable particulate matter in various emissions can be reduced, it will play a huge role in the elimination of smog. However, the current technology costs in this area are very high, and they are basically large-scale treatment equipment for factory emissions or indoor air circulation purification systems, and treatment technologies for small mobile emission sources such as motor vehicles have not yet been reported. .

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the purpose of the present invention is to provide a brand-new gas purification device for solving the problems of absorption and filtration of particulate matter in the air, especially suitable for emissions from mobile equipment such as motor vehicles deal with.

In order to achieve the above object, the present invention provides a gas purification device, which is characterized in that it includes: a first outer partition, a second outer partition, more than two electrode units, more than two flexible vibrating membranes and a membrane fixing member The first outer baffle and the second outer baffle are face-to-face and spaced apart, and the gap in the middle forms a gas flow channel; the first outer baffle and the second outer baffle are bonded on the side facing the gas flow channel There are said electrode units, each electrode unit has an electrode unit with the same size and shape on the opposite side of the separator, and is spaced directly opposite to form an electrode unit group, and each electrode unit group is insulated Isolation: each electrode unit group is matched with a flexible diaphragm in the gas flow channel, one end of the flexible diaphragm is fixed on the diaphragm holder, and the other end along the gas flow direction is a free end , so that the flexible vibrating membrane can contact and separate from the surface of the two electrode units of the corresponding electrode unit group under the action of gas; the material of the electrode unit and the surface material of the flexible vibrating membrane have different triboelectric properties ;

Preferably, several intermediate partitions are also included, and the intermediate partitions are arranged at intervals between the first outer partition and the second outer partition to form more than two gas flow passages. The electrode units are pasted on both sides, and each electrode unit has an electrode unit with the same size and shape on the opposite side of the separator and is spaced directly opposite it to form an electrode unit group;

Preferably, the relative distance and angle between any two partitions are adjustable;

Preferably, all the partitions are arranged in parallel;

Preferably, the size and shape of each of the intermediate partitions are the same, and the distance between two adjacent partitions is the same;

Preferably, the surface of the separator is made of insulating material;

Preferably, the material of the electrode unit is selected from metals, conductive oxides or organic conductors;

Preferably, the thickness of the electrode unit is 20nm-2mm;

Preferably, each of the electrode units has the same shape;

Preferably, the projection of the electrode unit on the attached separator is rectangular, and the aspect ratio is greater than or equal to 2:1, wherein the direction along the gas flow is the length direction;

Preferably, the size of each of the electrode units is the same;

Preferably, on the same separator, each of the electrode units is distributed in a determinant array, wherein the gas flow direction is the column direction;

Preferably, insulating baffles perpendicular to the separators are provided on both sides of each column of the electrode units, so as to separate the gas channels;

Preferably, the insulating baffle divides the gas flow channel into several independent branch flow channels;

Preferably, the distance between two opposite electrode units in each electrode unit group is 0.2cm-5cm;

Preferably, the surface of the flexible vibrating membrane is an insulating material;

Preferably, the flexible diaphragm has a thickness of 1 μm-1 mm;

Preferably, the surface of the flexible vibrating membrane facing the electrode unit is rectangular, and its aspect ratio is greater than or equal to 2:1, wherein the gas flow direction is the length direction;

Preferably, the surface of the flexible vibrating membrane in contact with the electrode unit is subjected to polarization treatment, and/or the surface is provided with microstructures, which are used to increase the effective contact between the flexible vibrating membrane and the electrode unit area;

Preferably, the distance between each membrane fixing member and two adjacent partitions forming the gas channel is the same;

Preferably, the membrane fixing member includes a rotating shaft and a splint, the splint is fixed on the rotating shaft and can rotate around the rotating shaft, and the flexible vibrating membrane is connected to the membrane fixing member through the splint;

Preferably, a deflector is also included for adjusting the direction in which the gas enters the gas channel;

Preferably, it also includes a casing, the casing has an air inlet, an air outlet and a cavity, and the first outer partition, the second outer partition and the middle partition are located in the cavity;

Preferably, it also includes a casing, the casing has an air inlet, an air outlet and a cavity, and the first outer partition, the second outer partition, the middle partition and the deflector are located in the cavity;

Preferably, a filter screen is installed between the air inlet and the deflector;

Preferably, the housing is made of insulator material;

Preferably, the casing is a detachable structure.

The present invention also provides a motor vehicle exhaust gas purification device, comprising any one of the gas purification devices described above.

The present invention also provides a motor vehicle exhaust gas purification device, including any gas purification device mentioned above, wherein the air inlet is connected to the exhaust port of the motor vehicle.

Through the above technical scheme, the beneficial effects of the present invention are: the gas purification device of the present invention has the advantages of low cost, no pollution, high adsorption efficiency and recyclable use. , PM2.5, PM5.0 and PM10.0 and other particles that cause smog are effectively absorbed and filtered.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a top view schematic diagram of the main components in the typical structure of the gas purification device of the present invention;

Fig. 2 is the schematic front view of the main components in the typical structure of the gas purification device of the present invention;

Fig. 3 is a working principle diagram of the gas purification device of the present invention;

Fig. 4 is a schematic top view of main components in another typical structure of the gas purification device of the present invention;

Fig. 5 is a kind of typical structure schematic diagram of membrane fixture in the gas purification device of the present invention;

Fig. 6 is a schematic front view of main components in another typical structure of the gas purification device of the present invention;

Fig. 7 is a schematic front view of main components in another typical structure of the gas purification device of the present invention;

Fig. 8 is a schematic top view of the main components in another typical structure of the gas purification device of the present invention;

Fig. 9 is a schematic front view of main components in the gas purification device shown in Fig. 8;

Fig. 10 is a schematic front view of the main components in another typical structure of the gas purification device of the present invention;

Fig. 11 is a schematic front view of the main components in another typical structure of the gas purification device of the present invention;

Fig. 12 is a schematic front view of main components in another typical structure of the gas purification device of the present invention.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

In the present invention, unless stated to the contrary, the used orientation words such as "up and down" refer to directions in the drawings; "inside" refers to the interior of the corresponding structure, and "outside" refers to the exterior of the corresponding structure.

Figures 1 and 2 show a typical structure of the gas purification device of the present invention, wherein Figure 1 is a top view of the main components, and Figure 2 is a front view of the main components. The device comprises: a first outer baffle 101, a second outer baffle 102, more than two electrode units 20, more than two flexible vibrating membranes 30 and a film fixing member 40; the first outer baffle 101 and the second outer baffle The separators 102 are face-to-face and spaced apart, and the gap in the middle forms a gas flow channel; on the sides of the first outer separator 101 and the second outer separator 102 facing the gas flow channel, a plurality of electrode units 20 are attached, and each electrode unit 20 On the side of the opposite separator, there is an electrode unit 20 with the same size and shape spaced apart from it to form an electrode unit group, and each electrode unit group is insulated and isolated; each electrode unit group is in the gas flow. A flexible vibrating membrane 30 is matched in the channel, one end of the flexible vibrating membrane 30 is fixed on the membrane fixing member 40, and the other end along the gas flow direction is a free end, so that the flexible vibrating membrane 30 can be connected with the corresponding electrode unit group under the action of the gas. The surfaces of the two electrode units 20 contact and separate; the materials of the electrode units 20 and the surface materials of the flexible vibrating membrane 30 have different triboelectric properties.

The triboelectric properties of materials involved in the present invention refer to the ability of a material to gain and lose electrons during friction or contact with other materials, that is, when two different materials are in contact or friction, one is positively charged and the other is charged. Negative charge indicates that the two materials have different electron-accepting abilities, that is, the triboelectric properties of the two materials are different. For example, when the polymer nylon is in contact with aluminum foil, its surface is positively charged, that is, it has a strong ability to lose electrons. When the polymer polytetrafluoroethylene contacts with aluminum foil, its surface is negatively charged, that is, it has a strong ability to gain electrons.

The gas in this embodiment is particularly related to automobile exhaust, and the corresponding particulate matter mainly includes PM1.0, PM2.5, PM5.0 and PM10.0 in automobile exhaust that cause smog, but is not limited to these particulate matter, Other particles that cause air haze are also within the protection scope of the present invention.

In this embodiment, the electrode plate 20 and the flexible vibrating membrane 30 essentially constitute a friction generator, the basic principle of which is shown in Fig. The vibrating membrane 30 causes a disturbance, so that the flexible vibrating membrane 30 vibrates between two electrode units (marked as 201 and 202 here for convenience of distinction), and its surface repeatedly contacts and separates with the electrode units 201 and 202, due to The surface of the flexible vibrating membrane 30 and the surfaces of the electrode units 201 and 202 have different triboelectric properties, so that the two will form opposite surface charges on the surfaces of the two materials during the contact process. When the two materials are separated, These surface charges will form an electrostatic field between the electrode unit 201 or 202 and the flexible diaphragm 30 . The existence of these electrostatic fields can promote the adsorption of particles in the airflow, thereby achieving the purpose of gas purification. It can be seen that the device of the present invention cleverly uses the disturbance of the airflow itself to the flexible vibrating membrane to form an electric field, and can realize electrostatic dust removal without external power supply. The overall structure is simple, easy to clean, and has very strong practicability.

The components of the gas purification device of the present invention will be described in detail below in conjunction with this embodiment, but those skilled in the art should be clear that these descriptions are not only for this embodiment, but are applicable to all embodiments of the present invention. This way of writing is only for the convenience and brevity of description.

The first outer baffle 101 and the second outer baffle 102 are mainly used to form a gas flow channel and provide support for the electrode unit 20, and are generally made of hard materials, and elastic materials can also be used in special cases. In order to ensure the uniform distribution of charges on the surface of each electrode unit 20, the surface of the separator is preferably made of insulating material, and organic polymer materials commonly used in this field can be used. The separator can be a uniform structure formed of a single material, or a multi-layer structure formed of the same or different materials to meet different mechanical or other property requirements. The distance and angle between the two partitions can be adjusted according to the actual situation, for example, they can be parallel or at a certain angle, and the distance between the two should meet the sufficient contact between the flexible diaphragm 30 and the electrode unit 20 and separation. The shapes of the first outer partition 101 and the second outer partition 102 are not specifically limited, and may be flat or curved. The sizes of the two can be the same or different. In the embodiment shown in Figure 1 and Figure 2, the two partitions are flat rectangular plates with the same size, and they are placed directly opposite to each other in parallel. This is only a way of realization. In actual operation, the shape, size and relative position of the partition Both are adjustable.

The electrode unit 20 should have a conductive outer surface, and its material can be selected from metals, alloys, conductive oxides or organic conductors. Metal or alloy materials are preferably used, including alloys in any proportion of one or more of aluminum, copper, gold and silver, preferably aluminum. The electrode unit 20 is pasted on the side faces of the first outer separator 101 and the second outer separator 102 facing the gas channel. The thickness of the electrode unit 20 is generally 20nm-2mm, preferably 100nm-1mm, more preferably 500nm-500μm. The device comprises more than two electrode units 20 distributed on two separators, each electrode unit 20 on one separator has another electrode unit 20 with the same shape and size on the opposite separator The two electrode units 20 are arranged at intervals directly opposite to them, so that the two electrode units 20 jointly form an electrode unit group, and work together with the flexible vibrating membrane 30 to form the required triboelectric generator. Any two adjacent electrode units 20 are insulated and isolated, so as to ensure that each electrode unit group is insulated and isolated. The distance between two electrode units facing each other in each electrode unit group is 0.2 cm-5 cm, preferably 0.5 cm-3 cm, more preferably 0.8 cm-1.5 cm.

Although the two electrode units 20 in each electrode unit group need to have the same shape and size, it is not required that the electrode units 20 in different electrode unit groups have the same shape and size. In other words, the shape and size of the electrode units 20 in different electrode unit groups may be the same or different, for example, one group may be rectangular and the other group may be circular. In the embodiment shown in Figure 4, three electrode units 201, 202 and 203 with different shapes and sizes are used, and the arrangement of these electrode units is also different, so that the electrode units can be adjusted according to the distribution of the gas flow field in the gas flow channel. position to achieve the best gas cleaning effect. In the present invention, the projection of the electrode unit 20 on the bonded separator is preferably rectangular, and the aspect ratio (length:width) is greater than or equal to 2:1. The present invention defines the gas flow direction as the length direction. When the sizes of the electrode units 20 are the same, preferably, these electrode units 20 are distributed in a determinant array on the same separator, and the gas flow direction is the column direction. Such a regular structure is convenient for batch processing.

The flexible vibrating membrane 30 is another important part of the purification device of the present invention. The most critical feature is flexibility, that is, it can vibrate under the disturbance of the air flow so as to contact and separate from the electrode unit 20 . To ensure flexibility, it should not be too thick, generally 1 μm-1 mm, preferably 10 μm-500 μm, more preferably 50 μm-200 μm. In addition, the outer surface of the flexible vibrating membrane 30 should have different triboelectric properties from the surface material of the electrode unit 20 , so that the triboelectric generator can actually be formed and work normally. The surface of the present invention is preferably made of insulating materials, especially organic polymer materials, which are commonly used materials in this field, especially friction materials commonly used in friction generators, which can be arbitrarily selected from the following materials: Formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide nylon 11, polyamide nylon 66, wool and its fabrics, silk and its fabrics, paper, polyethylene glycol succinate, cellulose, cellulose acetate, Polyethylene glycol adipate, polydiallyl phthalate, regenerated cellulose sponge, cotton and its fabrics, polyurethane elastomer, styrene-acrylonitrile copolymer, styrene-butadiene copolymer, Wood, hard rubber, acetate, rayon, polymethyl methacrylate, polyvinyl alcohol, polyester, polyisobutylene, polyurethane elastic foam, polyethylene terephthalate, polyvinyl butyral, butyl Diene-acrylonitrile copolymer, neoprene, natural rubber, polyacrylonitrile, poly(vinylidene chloride-co-acrylonitrile), polybisphenol A carbonate, polychloroethers, polyvinylidene chloride, poly( 2,6-Dimethylpolyphenylene oxide), polystyrene, polyethylene, polypropylene, polydiphenylpropane carbonate, polyethylene terephthalate, polyimide, polychloride Ethylene, Dimethicone, Chlorotrifluoroethylene, Polytetrafluoroethylene, and Parylene.

The flexible vibrating membrane 30 is located in the gap between the two electrode units of each electrode unit group, that is, in the gas flow channel. One end is a fixed end, which is fixed by the membrane fixing member 40, and the other end is a free end. The direction of the gas flow is extended so that the gas can be effectively disturbed when the gas flows through, resulting in the contact and separation of the flexible diaphragm 30 and the electrode unit 20 . In order to increase the contact area between the flexible vibrating membrane 30 and the electrode unit 20, the shape and size of the flexible vibrating membrane 30 preferably match the shape and size of the surface of the electrode unit 20 facing the gas flow channel, and generally the shapes of the two are the same or similar , the size of the flexible diaphragm 20 should also be close to the electrode unit 20, which can be slightly larger or smaller. Preferably, the surface of the flexible vibrating membrane 30 facing the electrode unit 20 is rectangular, and its aspect ratio (length:width) is greater than or equal to 2:1, and the gas flow direction is defined as the length direction in the present invention. Same as the electrode unit 20 , the sizes of the flexible vibrating membranes 30 can be the same or different, see FIG. 1 and FIG. 4 .

In order to increase the surface charge density generated after the flexible vibrating membrane 30 is in contact with the electrode unit 20, the surface of the flexible vibrating membrane can be polarized, or a microstructure can be arranged on its surface to increase the contact between the flexible vibrating membrane 30 and the electrode unit 20. effective contact area. These two processing methods can be used at the same time, or one can be used alone, depending on the actual situation. The microstructures are preferably nanowires, nanotubes, nanoparticles, nanorods, nanoflowers, nanogrooves, microgrooves, nanocones, microcones, nanospheres and microsphere structures, and arrays formed by the aforementioned structures, especially It is a nanoarray composed of nanowires, nanotubes or nanorods, which can be a linear, cubic, or quadrangular pyramid-shaped array prepared by photolithography, plasma etching, etc., and the size of each such unit in the array On the order of nanometers to micrometers, the unit size and shape of specific micro-nanostructures should not limit the scope of the present invention.

The membrane fixing part 40 is used to fix one end of the flexible vibrating membrane 30 . In order to improve the sensitivity of the flexible vibrating membrane to airflow, the membrane fixing part 40 can be formed by using a rotating shaft and a splint. Referring specifically to FIG. 5 , one end of the splint 401 is sleeved on the rotating shaft 402 , and the other end clamps the flexible diaphragm 30 to fix it. The splint 401 can rotate around the rotating shaft 402 . Of course, this is only a specific implementation mode, and there are many other ways in this field that can realize the purpose of the present invention, which cannot be repeated here, but the selection of these conventional ways can not bring creativity to the technical solution, so they all belong to scope covered by the present invention.

The position of the membrane fixing member 40 is generally located in the gas flow channel, preferably at the same distance from two adjacent partitions forming the gas flow channel, even if the fixed end of the flexible vibrating membrane 30 is located in the middle of the gas flow channel. This position can be adjusted if the weight of the flexible diaphragm 30 is relatively large.

FIG. 6 is a schematic diagram of another typical structure of the gas purification device of the present invention. On the basis of the embodiment shown in FIGS. 1 and 2 , it also includes several intermediate partitions 103 . The middle partition 103 is arranged between the first outer partition 101 and the second outer partition 102 at intervals, and divides the original gas flow channel into two or more multi-layered gas flow channels. Moreover, electrode units 20 are pasted on both sides of each intermediate partition, and the setting requirements of the electrode unit 20 are the same as the above-mentioned setting requirements on the first outer partition 101 and the second outer partition 102, that is, each electrode unit On the opposite separators, there is an electrode unit with the same size and shape spaced directly opposite it to form an electrode unit group, and these electrode unit groups are also insulated and isolated.

The restrictions and requirements for the middle partition 103 are the same as those of the first outer partition 101 and the second outer partition 102, for example, the surface materials are all insulating materials, and the relative distance and angle between adjacent partitions can be adjusted, such as In the embodiment shown in FIG. 7 , adjacent partitions are not arranged in parallel, but at a certain angle. The shape and size are not particularly limited. Preferably, the shapes and sizes of the middle partitions 103 are the same, and the distance between two adjacent partitions is the same. Since the first outer partition 101 and the second outer partition 102 may be used as a casing, they are not limited to have the same shape and size as the middle partition 103 . It is not excluded that the first outer partition 101 and the second outer partition 102 are curved panels and the middle partition 103 is a flat panel.

In this embodiment, a three-dimensional multi-layer gas channel is formed, which can achieve a larger processing capacity and a better purification effect. The number of intermediate partitions can be determined according to actual needs.

Fig. 8 is another typical structural diagram of the gas purification device of the present invention. On the basis of the embodiment shown in Fig. 1 and Fig. 2, an insulating baffle 70 vertical to the partition is provided on both sides of each row of electrode units 20 , thereby separating the gas channels. The insulating baffle 70 can extend from the surface of one partition to the surface of another partition opposite to it, so as to divide the originally connected gas flow channel into several independent branch flow channels (see Figure 9); It is only connected to one partition, and the branch flow channels are not completely independent.

The surface of the insulating baffle 70 should be made of insulating material, and its shape and size can be adjusted according to actual conditions. The main purpose of setting the insulating baffle 70 is to adjust the direction and intensity of the airflow so as to achieve better gas purification effect.

The present invention also provides another way to adjust the gas flow direction in the device, that is, at least one deflector 60 is provided before the gas enters the electrode unit group (see FIG. 11 ). The deflector 60 can adopt a structure commonly used in the field. In order to better control the flow direction of the airflow, at least one air guide hole can be provided on the deflector 60 . Preferably, the deflector 60 and the electrode unit 20 are vertically arranged. The material of the surface of the deflector 60 may be hard insulating material, such as acrylic, plastic and so on.

Fig. 10 is another typical structural schematic diagram of the gas purification device of the present invention. On the basis of the foregoing structure, a housing 50 is added. The housing is a cavity structure with an air inlet 501 and an air outlet 502, and a first outer partition 101. , the second outer baffle 102 and the middle baffle 103 and the parts on them are all located in the cavity of the shell 50, if there is a baffle 60, then preferably the baffle 60 is also located in the cavity, and is in the air inlet 501 and between the partitions. Due to the adoption of the shell 50 in this embodiment, it is easy to install and carry.

The air inlet 501 and the air outlet 502 can be composed of common air ducts, and the material of the air ducts can be metal or high temperature resistant polymer materials. The positions of the air inlet 501 and the air outlet 502 can be set according to actual application conditions, and can be arranged on the same side of the housing 50 or on both sides of the housing 50 . In order to filter out the moisture in the airflow, a drying device or a condensation device (not shown on the way) can also be set on the air inlet 501. The drying device is a sealed box with desiccant particles inside, and the desiccant particles It can be a physical adsorption desiccant, such as silica gel, molecular sieve desiccant, etc., or a chemical adsorption desiccant, such as calcium chloride or calcium sulfate, etc.; the condensation device is a common condensation tube.

In the structure shown in Fig. 10, the first outer partition 101 and the second outer partition 102 are directly used as the side walls of the housing 50, but this is not necessary, and in other embodiments the side walls of the housing can be provided separately , and the first outer partition 101 and the second outer partition 102 are directly attached to the inner side of the side wall. When the electrode unit 20 is directly attached to the side wall of the casing 50 , its surface should be made of insulator material, and the insulator material includes at least one of plastic and acrylic plate. In other cases, the housing can also be a metallic material or a semiconductor material.

The shell 50 is a detachable structure for cleaning the flexible diaphragm 30 , the electrode unit 20 or the deflector 60 . The shape of the housing 50 is not specifically limited here. Although the cross section of the housing shown in FIG. 10 is rectangular, it can be adjusted according to the airflow conditions and the installation position in actual use. For example, the structure shown in FIG. 12 can be adopted. A frustum-like structure is used at the gas inflow end and the gas outflow end to adjust the airflow.

Considering that larger particles in the airflow can be filtered out before the airflow enters the electrode unit group, a filter screen can be installed between the air inlet 501 and the deflector 60 . The filter screen can be a metal filter screen or made of non-metallic material.

Regardless of whether the deflector 60 is provided, the air inlet 501 and the air outlet 502 can be on the same side of the housing 50 or on different sides of the housing 50 , and can be designed according to the shape of the housing 50 and the arrangement of the deflector 60 .

According to the above-mentioned gas purification device, the present invention also provides a motor vehicle exhaust gas purification device, which is composed of any one of the aforementioned gas purification devices, wherein for the embodiment without the shell 50, it can be installed inside the exhaust pipe of the motor vehicle , the automobile exhaust pipe can be used as its shell; for the embodiment comprising the shell 50, the air inlet 501 can be directly connected to the exhaust port of the motor vehicle, and the exhaust gas discharged during the work of the motor vehicle will directly pass through the air inlet. Enter the purification device, drive the flexible vibrating membrane 30 in the purification device to vibrate, and form a friction generator with the electrode unit 20 to generate electricity, generate a high-voltage electric field, and electrostatically adsorb the particles in the gas to achieve the purpose of gas purification.

Therefore, it can be seen that the gas dedusting device of the present invention has the advantages of low cost, no pollution, high adsorption efficiency, and recyclable use. It is applied to motor vehicles and can remove PM1.0, PM2.5, PM5. 0 and PM10.0 and other particles that cause smog can be effectively absorbed and filtered.

Example

The number of electrode unit groups: 3×4×4=48; the flexible diaphragm is composed of 100 μm flexible polyimide (English abbreviation kapton), and the surface of kapton is etched with nanostructures by ICP, size: 1.9cm×3.4cm ×1.9cm; the first outer partition, the second outer partition, the middle partition and the insulating baffle are composed of acrylic plates with a thickness of 2mm, and the electrode unit is made of 0.2mm metal aluminum; the deflector is made of acrylic plates with a thickness of 3mm and placed on the surface There are 12 air guide holes with a diameter of 4mm, and the entire shell is composed of metal aluminum foil (0.4mm); the diameter of the air inlet and outlet is 2cm.

Filtration effect: The voltage between a single electrode unit group and the flexible diaphragm is above 400V, and the filtration efficiency of PM2.5, PM5.0, and PM10.0 of automobile exhaust exceeds 85%.

The preferred embodiment of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the specific details of the above embodiment, within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, These simple modifications all belong to the protection scope of the present invention. For example, changes in the shape, material and size of each part.

In addition, it should be noted that the various specific technical features described in the above specific implementation manners may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (29)

1. A gas purification device, characterized in that, comprising: The first outer separator, the second outer separator, more than two electrode units, more than two flexible vibrating membranes and membrane fixing parts; The first outer partition and the second outer partition are face-to-face and spaced apart, and the gap in the middle forms a gas flow channel; The electrode units are pasted on the sides of the first outer partition and the second outer partition facing the gas flow channel, and each electrode unit has an electrode unit with the same size and shape on the opposite side of the partition. The electrode units are arranged at intervals directly opposite to it to form an electrode unit group, and each electrode unit group is insulated and isolated; Each of the electrode unit groups is matched with one flexible diaphragm in the gas flow channel, one end of the flexible diaphragm is fixed on the diaphragm holder, and the other end along the gas flow direction is a free end, so that The flexible vibrating membrane can contact and separate from the surfaces of the two electrode units of the corresponding electrode unit group under the action of gas; The surface material of the electrode unit and the surface material of the flexible vibrating membrane have different triboelectric properties. 2. The device according to claim 1, further comprising several intermediate partitions, the intermediate partitions are arranged at intervals between the first outer partition and the second outer partition, forming two or more The gas flow channel is attached with the electrode units on both sides of the middle partition, and each electrode unit has an electrode unit with the same size and shape on the opposite side of the partition and spaced directly opposite it. set to form an electrode unit group. 3. The device according to claim 2, wherein the relative distance and angle between any two of the first outer partition, the second outer partition and the middle partition are adjustable . 4. The device according to claim 2, wherein the first outer partition, the second outer partition and the middle partition are arranged in parallel. 5. The device according to claim 2, wherein the size and shape of each of the intermediate partitions are the same, and the distance between two adjacent partitions is the same. 6. The device of claim 2, wherein surfaces in the first outer partition, the second outer partition, and the middle partition are made of an insulating material. 7. The device according to any one of claims 1-6, wherein the material of the electrode unit is selected from metals, conductive oxides or organic conductors. 8. The device according to any one of claims 1-6, characterized in that, the thickness of the electrode unit is 20nm-2mm. 9. The device according to any one of claims 1-6, wherein the shape of each of the electrode units is the same. 10. The device according to claim 9, wherein the projection of the electrode unit on the pasted separator is rectangular, and the aspect ratio is greater than or equal to 2:1, wherein the direction along the gas flow is the length direction . 11. The device according to claim 9, wherein the size of each of the electrode units is the same. 12. The device according to any one of claims 1-6, characterized in that, on the same separator, each of the electrode units is distributed in a determinant array, wherein the gas flow direction is the column direction. 13. The device according to claim 12, characterized in that, on both sides of each column of the electrode unit, vertical to the first outer partition, the second outer partition and the middle partition Insulation baffle. 14. The device according to claim 13, wherein the insulating baffle divides the gas channel into several independent branch channels. 15. The device according to any one of claims 1-6, characterized in that the distance between two opposing electrode units in each electrode unit group is 0.2 cm-5 cm. 16. The device according to any one of claims 1-6, wherein the surface of the flexible diaphragm is made of insulating material. 17. The device according to any one of claims 1-6, wherein the thickness of the flexible diaphragm is 1 μm-1 mm. 18. The device according to any one of claims 1-6, wherein the surface of the flexible vibrating membrane facing the electrode unit is rectangular, and its aspect ratio is greater than or equal to 2:1, wherein the gas flow direction is Longitudinal direction. 19. The device according to any one of claims 1-6, characterized in that the surface of the flexible vibrating membrane in contact with the electrode unit is subjected to polarization treatment, and/or the surface is provided with a microstructure, the microstructure The structure is used to increase the effective contact area between the flexible vibrating membrane and the electrode unit. 20. The device according to any one of claims 1-6, characterized in that the distance between each membrane fixing member and two adjacent partitions forming the gas flow channel is the same. 21. The device according to claim 20, wherein the membrane fixing member comprises a rotating shaft and a splint, the splint is fixed on the rotating shaft and can rotate around the rotating shaft, and the flexible vibrating membrane is connected to the splint through the splint. Membrane fasteners are attached. 22. The device according to any one of claims 1-6, further comprising a deflector for adjusting the direction in which gas enters the gas channel. 23. The device according to any one of claims 1-6, further comprising a casing, the casing has an air inlet, an air outlet and a cavity, the first outer partition, the second outer partition A plate and an intermediate partition are located within the cavity. 24. The device according to claim 22, further comprising a casing, the casing has an air inlet, an air outlet and a cavity, and the first outer partition, the second outer partition, and the middle partition and a baffle located within the cavity. 25. The device of claim 23, wherein a screen is installed between the air inlet and the deflector. 26. The device of claim 23, wherein the housing is made of an insulator material. 27. The device according to claim 23, wherein the housing is a detachable structure. 28. A motor vehicle exhaust gas purification device, characterized by comprising the gas purification device according to any one of claims 1-22. 29. A motor vehicle exhaust purification device, characterized by comprising the gas purification device according to any one of claims 23 to 27, wherein the air inlet is connected to the exhaust port of the motor vehicle.