CN105756750A - Gas purifying device - Google Patents
Gas purifying device Download PDFInfo
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- CN105756750A CN105756750A CN201410778602.XA CN201410778602A CN105756750A CN 105756750 A CN105756750 A CN 105756750A CN 201410778602 A CN201410778602 A CN 201410778602A CN 105756750 A CN105756750 A CN 105756750A
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Abstract
The invention discloses a gas purifying device based on a friction generator; the gas purifying device employs a flexible vibrating diaphragm structure, and uses airflow to disturb the flexible vibrating diaphragm, so the flexible vibrating diaphragm can vibrate so as to make contact with and separate from an electrode unit, thus forming the friction generator and driving the generator to work in real time, and forming a high voltage electric field so as to use static sorption to remove gas particles. The gas purifying device needs no power source, can be smartly driven by airflow energy, is simple in structure, low in cost, pollution free, high in absorption efficiency, and recyclable; the gas purifying device is applied in motor vehicle tail gas processing so as to effectively absorb and filter particles causing haze, wherein the particles comprise PM 1.0, PM 2.5, PM 5.0, and PM 10.0.
Description
Technical field
The present invention relates to Air haze prevention and control field, in particular it relates to a kind of gas cleaning plant based on friction generator.
Background technology
Severe haze weather occurred in China again and again in recent years.Haze not only causes air muddiness, visibility deterioration, affects safety, also results in the respiratory tract infection of people and the generation of cardiovascular disease, seriously injures the Health and Living of the mankind.
Current national administers mode mainly following several classes of haze: reduce the discharge of industrial waste gas and vehicle exhaust, the quality improving fuel oil and coal and rain making etc..Government also takes a series of behave to respond the improvement of haze, as closed contaminating enterprises, eliminate underproof motor vehicles, limiting vehicle licence plate, vehicle odd-and-even license plate rule, strictly monitor fuel oil quality, heavenwards sprays water smoke etc..The method Problems existing of these improvement is cured the symptoms, not the disease exactly, and cost is big and DeGrain, and substantial amounts of enterprise close causes the unemployment of large area population and increases to national economy and cause the loss that cannot estimate.Therefore do root, find accurately polluter to its carry out absorption process be only a preferable road.
The mainly composition of haze is sulfur dioxide, nitrogen oxides and pellet dust, and wherein pellet is as the kernel of float, is the factor forming haze most critical.If the content of pellet in various emission can be reduced, it will huge effect is played in the elimination of haze.But technical costs at present in this respect is all very high, and is substantially for the large-scale process equipment of plant emissions or the circulating purification system for room air, and the treatment technology for miniature movable type emission sources such as motor vehicles have not been reported.
Summary of the invention
In order to solve the problems referred to above of the prior art, it is an object of the invention to provide a kind of brand-new gas cleaning plant, for solving the absorption of particulate in air and the problem of filtration, be particularly suited for the emissions processes of the packaged type equipment such as motor vehicles.
To achieve these goals, the present invention provides a kind of gas cleaning plant, it is characterised in that including: the first external partition, the second external partition, the electrode unit of more than 2, the flexible diaphragm of more than 2 and film fixture；Described first external partition and the face-to-face interval of the second external partition are arranged, and middle space forms gas flow；Described first external partition and the second external partition are fitted with described electrode unit on the side of described gas flow, each electrode unit is in relative bulkhead sides, all have a size and shape to be the same from electrode unit right opposite interval with it to arrange, form an electrode unit group, be dielectrically separated between each electrode unit group；Each described electrode unit group is mated in described gas flow and is arranged a described flexible diaphragm, one end of described flexible diaphragm is fixed on described film fixture, the other end along gas flow direction is free end so that described flexible diaphragm can come in contact with 2 electrode unit surfaces of respective electrode unit group and separate under the effect of gas；The material of described electrode unit has different triboelectric characteristics from the surfacing of described flexible diaphragm；
Preferably, also include some central dividing plates, described central dividing plate is disposed between described first external partition and the second external partition, form the gas flow of more than 2, it is fitted with described electrode unit in the both sides of described central dividing plate, each electrode unit, in relative bulkhead sides, all has a size and shape to be the same from electrode unit right opposite interval with it and arranges, form an electrode unit group；
Preferably, relative distance between dividing plate described in any two and adjustable angle；
Preferably, all described dividing plates be arranged in parallel；
Preferably, the size and dimension of each described central dividing plate is identical, and the spacing between adjacent two dividing plates is identical；
Preferably, the surface of described dividing plate is made up of insulant；
Preferably, the material selected from metal of described electrode unit, conductive oxide or organic conductor；
Preferably, the thickness of described electrode unit is 20nm-2mm；
Preferably, the shape of each described electrode unit is identical；
Preferably, described electrode unit is projected as rectangle on the dividing plate fitted, and length-width ratio is be more than or equal to 2:1, is wherein length direction along gas flow direction；
Preferably, each described electrode unit is equivalently-sized；
Preferably, on same dividing plate, each described electrode unit is determinant array distribution, and wherein gas flow direction is column direction；
Preferably, the insulation barrier with described divider upright is set, thus being separated by described gas flow in the both sides of electrode unit described in every string；
Preferably, described gas flow is divided into some independent branch flow passage by described insulation barrier；
Preferably, in each described electrode unit group, two relative electrode unit spacing are 0.2cm-5cm；
Preferably, the surface of described flexible diaphragm is insulant；
Preferably, the thickness of described flexible diaphragm is 1 μm of-1mm；
Preferably, described flexible diaphragm is rectangle towards the surface of described electrode unit, and its length-width ratio is be more than or equal to 2:1, and wherein gas flow direction is length direction；
Preferably, the surface that described flexible diaphragm contacts with described electrode unit processes through polarization, and/or, surface configuration has micro structure, and this micro structure is for increasing effective contact area of described flexible diaphragm and described electrode unit；
Preferably, the distance between each described film fixture and two adjacent separator constituting described gas flow is identical；
Preferably, described film fixture includes rotating shaft and clamping plate, and described Boards wall is in rotating shaft and can rotate around rotating shaft, and described flexible diaphragm is connected with described film fixture by described clamping plate；
Preferably, also include deflector, enter the direction of described gas flow for adjusting gas；
Preferably, also including shell, described shell has air inlet, gas outlet and cavity, and described first external partition, the second external partition and central dividing plate are positioned at described cavity；
Preferably, also including shell, described shell has air inlet, gas outlet and cavity, and described first external partition, the second external partition, central dividing plate and deflector are positioned at described cavity；
Preferably, between described air inlet and deflector, filter screen is installed；
Preferably, described shell is made up of insulating material；
Preferably, described shell is demountable structure.
The present invention also provides for a kind of motor-vehicle tail-gas purifying device, including any of the above-described described gas cleaning plant.
The present invention also provides for a kind of motor-vehicle tail-gas purifying device, and including any of the above-described kind of gas cleaning plant, wherein said air inlet is connected with the air vent of described motor vehicles.
Pass through technique scheme, the invention has the beneficial effects as follows: the gas cleaning plant of the present invention has the advantages such as cost is low, pollution-free, adsorption efficiency is high and can be recycled, it is arranged on vehicle, it is possible to PM1.0, PM2.5, PM5.0 and the PM10.0 etc. in vehicle exhaust cause the particulate matter of haze carry out effectively absorbing and filtering.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, is used for explaining the present invention, but is not intended that limitation of the present invention together with detailed description below.In the accompanying drawings:
Fig. 1 is the schematic top plan view of critical piece in gas cleaning plant typical structure of the present invention；
Fig. 2 is the front elevational schematic of critical piece in gas cleaning plant typical structure of the present invention；
Fig. 3 is the fundamental diagram of gas cleaning plant of the present invention；
Fig. 4 is the schematic top plan view of critical piece in gas cleaning plant another kind typical structure of the present invention；
Fig. 5 is a kind of typical structure schematic diagram of film fixture in gas cleaning plant of the present invention；
Fig. 6 is the front elevational schematic of critical piece in gas cleaning plant another kind typical structure of the present invention；
Fig. 7 is the front elevational schematic of critical piece in gas cleaning plant another kind typical structure of the present invention；
Fig. 8 is the schematic top plan view of critical piece in gas cleaning plant another kind typical structure of the present invention；
Fig. 9 is the front elevational schematic of critical piece in the gas cleaning plant shown in Fig. 8；
Figure 10 is the front elevational schematic of critical piece in gas cleaning plant another kind typical structure of the present invention；
Figure 11 is the front elevational schematic of critical piece in gas cleaning plant another kind typical structure of the present invention；
Figure 12 is the front elevational schematic of critical piece in gas cleaning plant another kind typical structure of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention.
In the present invention, when not making contrary explanation, the noun of locality of use refers to the direction in diagram such as " upper and lower "；" interior " refers to inside corresponding construction, and " outward " refers to outside corresponding construction.
Shown in Fig. 1 and Fig. 2 is a kind of typical structure of gas cleaning plant of the present invention, and wherein Fig. 1 is the top view of critical piece, and Fig. 2 is the front view of critical piece.This device includes: the flexible diaphragm 30 of the electrode unit more than 20,2 of first external partition the 101, second external partition more than 102,2 and film fixture 40；First external partition 101 and the face-to-face interval of the second external partition 102 are arranged, and middle space forms gas flow；At the first external partition 101 and the second external partition 102, some electrode units 20 are set towards laminating on the side of gas flow, each electrode unit 20 is in relative bulkhead sides, all have a size and shape to be the same from electrode unit 20 right opposite interval with it to arrange, form an electrode unit group, be dielectrically separated between each electrode unit group；Each electrode unit group is mated in gas flow and is arranged a flexible diaphragm 30, one end of flexible diaphragm 30 is fixed on film fixture 40, the other end along gas flow direction is free end so that flexible diaphragm 30 can come in contact with 2 electrode unit 20 surfaces of respective electrode unit group and separate under the effect of gas；The material of electrode unit 20 has different triboelectric characteristics from the surfacing of flexible diaphragm 30.
The material friction electrical characteristics related in the present invention refer to the receiving and losing electrons ability that a kind of material shows in the process rubbed or contact with other materials generation, namely one positively charged when two kinds different materials contacts or rubs, one electronegative, what both materials were described obtains electronic capability difference, that is the triboelectric characteristics of the two is different.Such as, time polymer nylon contacts with aluminium foil, its surface positively charged, namely betatopic ability is relatively strong, and time polymer poly tetrafluoroethene contacts with aluminium foil, its surface is electronegative, obtains electronic capability stronger.
Gas in present embodiment; particularly to vehicle exhaust; corresponding particulate matter mainly includes PM1.0, PM2.5, PM5.0 and the PM10.0 etc. in vehicle exhaust and causes the particulate matter of haze; but being not restricted to these particulate matters, other cause the particulate matter of Air haze also in protection scope of the present invention.
nullIn present embodiment，Battery lead plate 20 and flexible diaphragm 30 substantially constitute a friction generator，Its ultimate principle is as shown in Figure 3: when air-flow enters the gas flow formed by upper and lower two electrode units 20，Flexible diaphragm 30 can be caused disturbance，Flexible diaphragm 30 (is distinguished in order to convenient at two electrode units，Be here labeled as 201 and 202) between vibrate，There is being contacting and separating repeatedly in its surface and electrode unit 201 and 202，Owing to the surface of flexible diaphragm 30 and the surface of electrode unit 201 and 202 have different triboelectric characteristics，Make the two can form contrary surface charge respectively on the surface of bi-material in the process of contact，When bi-material separates，These surface charges can form electrostatic field between electrode unit 201 or 202 and flexible diaphragm 30.The existence of these electrostatic fields can promote the granule in air-flow to be adsorbed, thus having reached the purpose of gas purification.As can be seen here, assembly of the invention make use of air-flow itself to the disturbance of flexible diaphragm to form electric field dexterously, it is not necessary to externally fed can realize electrostatic precipitation, and overall structure is simple, it is easy to cleans, has very strong practicality.
Below with reference to present embodiment, each ingredient of gas cleaning plant of the present invention is described in detail, but it will be apparent to those skilled in the art, these illustrate not merely for present embodiment, but all of the embodiments of the present invention is all applicable, it is convenient and succinct that this style of writing mode is only used to narration.
First external partition 101 and the second external partition 102 are mainly used in constituting gas flow and providing for electrode unit 20 and support, and are generally hard material, in particular cases also applicable elastomeric material.For ensureing being uniformly distributed of each electrode unit 20 surface charge, the surface of dividing plate is preferably insulant, and organic polymer material commonly used in the art all can be selected for.Dividing plate both can be the homogeneous structural that homogenous material is formed, it is also possible to be of the same race or the multiple structure of different materials formation, to meet the requirement of different mechanics or other character.Distance and angle between 2 dividing plates all can be adjusted according to practical situation, for instance can be parallel or at an angle, distance therebetween should meet being fully contacted and separating between flexible diaphragm 30 with electrode unit 20.The shape of the first external partition 101 and the second external partition 102 is not particularly limited, it is possible to be flat board or curved slab.The size of the two can be the same or different.In embodiment shown in Fig. 1 and Fig. 2, two dividing plates are equivalently-sized flat rectangular plate, the parallel placement of right opposite, and this is only a kind of implementation, and in practical operation, the shape of dividing plate, size and relative position all can regulate.
Electrode unit 20 should have the outer surface of conduction, and its material can be selected from metal, alloy, conductive oxide or organic conductor.Preferably employ metal or alloy material, including the arbitrary proportion alloy of the one in aluminum, copper, gold and silver or many persons, it is preferred to aluminum.Electrode unit 20 is fitted in the first external partition 101 and the second external partition 102 on the side of gas flow.The thickness of electrode unit 20 is generally 20nm-2mm, it is preferred to 100nm-1mm, more preferably 500nm-500 μm.This device comprises the electrode unit 20 of more than 2, it is distributed on two dividing plates, each electrode unit 20 on one dividing plate all has another electrode unit 20 right opposite interval with it setting that shape and size are all identical on relative dividing plate, two such electrode unit 20 has collectively constituted an electrode unit group, common and flexible diaphragm 30 acts on, and constitutes required friction generator.It is dielectrically separated between the electrode unit 20 that any two is adjacent, thus ensureing to be dielectrically separated between each electrode unit group.The electrode unit spacing of two right opposites in each electrode unit group is 0.2cm-5cm, it is preferred to 0.5cm-3cm, more preferably 0.8cm-1.5cm.
Although two electrode units 20 in each electrode unit group need shape and size all identical, but the shape and size of the electrode unit 20 being not required in Different electrodes unit group are all identical.In other words, the shape and size of the electrode unit 20 in Different electrodes unit group can be identical, it is also possible to different, for instance can one group be rectangle, another group for circle.In embodiment shown in Fig. 4, employ the electrode unit 201,202 and 203 of 3 kinds of difformities and size, and the arrangement mode of these electrode units is also different, conveniently adjust the position of electrode unit according to the distribution of airflow field in gas flow, to realize the gas purifying effect of the best.Preferred electrode unit 20 of the present invention is projected as rectangle on the dividing plate fitted, and length-width ratio (length: width) is be more than or equal to 2:1, and it is length direction that the present invention defines gas flow direction.When each electrode unit 20 equivalently-sized, it is preferable that these electrode units 20 are in determinant array distribution on same dividing plate, and wherein gas flow direction is column direction.So regular structure is easy to batch machining.
Flexible diaphragm 30 is another vitals in purifier of the present invention, and the most key feature is flexible, namely can vibrate under the disturbance of air-flow, in order to come in contact with electrode unit 20 and separate.For ensureing flexibility, unsuitable blocked up, it is generally 1 μm of-1mm, it is preferred to 10 μm-500 μm, more preferably 50 μm-200 μm.In addition, the outer surface of this flexible diaphragm 30 should have different triboelectric characteristics from the surfacing of electrode unit 20, so could really constitute friction generator and make its normal operation.nullThe present invention preferably its surface is by insulant material，Particularly organic polymer material is made，These materials are the common used material of this area，Particularly conventional in friction generator friction material，Arbitrarily can select from llowing group of materials: amine-formaldehyde resins、Polyformaldehyde、Ethyl cellulose、Polyamide nylon 11、Polyamide nylon 66、Pilus Caprae seu Ovis and fabric thereof、Silkworm silk and fabric thereof、Paper、Polyethylene Glycol succinate、Cellulose、Cellulose acetate、Polyethyleneglycol adipate、Polydiallyl phthalate、Regenerated cellulosic sponge、Cotton and fabric thereof、Polyurethane elastomer、SAN、SB、Wood、Hard rubber、Acetate、Staple fibre、Polymethyl methacrylate、Polyvinyl alcohol、Polyester、Polyisobutylene、Elastic polyurethane sponge、Polyethylene terephthalate、Polyvinyl butyral resin、Hycar、Neoprene、Natural rubber、Polyacrylonitrile、Poly-(vinylidene chloride-co-acrylonitrile)、Poly bisphenol carbonic ester、CPPG、Polyvinylidene chloride、Poly-(2,6-dimethyl polyphenylene oxide)、Polystyrene、Polyethylene、Polypropylene、Poly-diphenyl propane carbonic ester、Polyethylene terephthalate、Polyimides、Polrvinyl chloride、Polydimethylsiloxane、Polytrifluorochloroethylene、Politef and Parylene.
In the flexible diaphragm 30 space between two electrode units of each electrode unit group, namely in gas flow, its one end is fixing end, it is fixed by film fixture 40, the other end is free end, direction along gas flowing extends so that it can be carried out effective disturbance when gas flows through, and causes being contacting and separating of flexible diaphragm 30 and electrode unit 20.For improving the contact area between flexible diaphragm 30 and electrode unit 20, the shape and size of preferred flexible diaphragm 30 match towards the shape and size on the surface of gas flow with electrode unit 20, generally the shape of the two is same or similar, in size, flexible diaphragm 20 also should be close with electrode unit 20, it is possible to slightly larger can also be slightly smaller.Preferred flexible diaphragm 30 is rectangle towards the surface of electrode unit 20, and its length-width ratio (length: width) is be more than or equal to 2:1, and it is length direction that the present invention defines gas flow direction.Identical with electrode unit 20, the size of each flexible diaphragm 30 can be the same or different, referring to Fig. 1 and Fig. 4.
In order to improve the surface charge density produced after flexible diaphragm 30 contacts with electrode unit 20, the surface of flexible diaphragm can be carried out polarization process, or in its surface configuration micro structure, to increase effective contact area of flexible diaphragm 30 and electrode unit 20.Both processing modes can use simultaneously, it is also possible to is used alone one, determines with specific reference to practical situation.This micro structure is preferably nano wire, nanotube, nano-particle, nanometer rods, nano flower, nanometer channel, micron trenches, nanocone, micron cone, nanosphere and micron chondritic, and the array formed by aforementioned structure, particularly by nano wire, the nano-array of nanotube or nanometer rods composition, can be through photoengraving, wire prepared by the methods such as plasma etching, cube, or the array of rectangular pyramid shape, in array, the size of each this unit is nanometer to micron dimension, the unit size of concrete micro nano structure, shape should not limit the scope of this invention.
Film fixture 40 is for one end of fixing flexible vibrating diaphragm 30, in order to improve the flexible diaphragm sensitivity to air-flow, it is possible to use rotating shaft and clamping plate collectively form film fixture 40.Specifically can referring to Fig. 5, one end of clamping plate 401 is enclosed within rotating shaft 402, and other end clamping flexible diaphragm 30 is so as to fixing, and clamping plate 401 can rotate around rotating shaft 402.Certainly, this is only a kind of detailed description of the invention, and this area also has other modes that much can realize the object of the invention, can not repeat one by one herein, but the selection of these usual manners can not bring creativeness to technical scheme, therefore broadly fall into the scope that the present invention contains.
The position of film fixture 40 is normally in gas flow, it is preferable that identical with the distance of two adjacent separator constituting gas flow, even if the fixing end of flexible diaphragm 30 is positioned at the centre of gas flow.If the weight of flexible diaphragm 30 is relatively large, this position can adjust.
Fig. 6 is the another kind of typical structure schematic diagram of gas cleaning plant of the present invention, on the basis of Fig. 1 and Fig. 2 illustrated embodiment, also includes some central dividing plates 103.This central dividing plate 103 is disposed between the first external partition 101 and the second external partition 102, and original gas flow is divided into the multi-layer gas runner of more than 2.And the both sides of each central dividing plate are fitted with electrode unit 20, the requirement that arranges of this electrode unit 20 requires identical with aforementioned arranging on the first external partition 101 and the second external partition 102, namely each electrode unit is on relative dividing plate, all have a size and shape to be the same from electrode unit right opposite interval with it to arrange, form an electrode unit group, be also dielectrically separated between these electrode unit groups.
The restriction of central dividing plate 103 is identical with aforementioned first external partition 101 and the second external partition 102 with requirement, such as surfacing is insulant, relative distance and angle between adjacent separator are all adjustable, embodiment as shown in Figure 7, adjacent separator is not be arranged in parallel, but at an angle.Shape and size are not particularly limited, it is preferable that the shape and size of each central dividing plate 103 are identical, and the spacing between adjacent two dividing plates is identical.Owing to the first external partition 101 and the second external partition 102 use possibly as shell, therefore not limiting its shape and size must be identical with central dividing plate 103.Central dividing plate 103 is the situation of surface plate for curved slab to be not precluded from the first external partition 101 and the second external partition 102.
Present embodiment defines the gas flow of stereoscopic multi-layer, it is possible to realize bigger treating capacity and better clean-up effect.Number for central dividing plate can be determined according to actual needs.
Fig. 8 is the another kind of typical structure schematic diagram of gas cleaning plant of the present invention, on the basis of the embodiment shown in Fig. 1 and Fig. 2, arranges the insulation barrier 70 with divider upright in the both sides of every string electrode unit 20, thus being separated by described gas flow.This insulation barrier 70 both can extend to the surface of another dividing plate on the other side from the surface of a dividing plate, is divided into some independent branch flow passage (referring to Fig. 9) with the gas flow by connection originally；Can also only connect with a dividing plate, between each branch flow passage and not completely independent.
The surface of insulation barrier 70 should be insulant, and its shape and size can be adjusted according to practical situation.The main purpose arranging insulation barrier 70 is to adjust airflow direction and intensity, in order to realize better gas purifying effect.
Present invention also offers the gas flow that another way is come in adjusting apparatus, namely at least one deflector 60 (can referring to Figure 11) is set before gas enters electrode unit group.This deflector 60 can adopt structure commonly used in the art, for better controling over air flow direction, can arrange at least one gas port on described deflector 60.Preferred deflector 60 and the orthogonal setting of electrode unit 20.The material on deflector 60 surface can be hard insulation, for instance acrylic, plastics etc..
Figure 10 is the another kind of typical structure schematic diagram of gas cleaning plant of the present invention, the basis of aforementioned structure adds shell 50, this shell is cavity structure, there are air inlet 501 and gas outlet 502, first external partition the 101, second external partition 102 and central dividing plate 103 and each parts thereon are respectively positioned in the cavity of shell 50, if there being deflector 60, then preferably deflector 60 also is located in cavity, and is between air inlet 501 and dividing plate.This embodiment is owing to have employed shell 50 so that it is have the advantages that to be easily installed and carry.
Air inlet 501 and gas outlet 502 can be made up of common airway, and air pipe material can be metal or heat-resistant polymer material.The position of air inlet 501 and gas outlet 502 can be configured according to practical situations, may be provided at the same side of described shell 50, it is possible to is arranged on the both sides of described shell 50.For filtering the moisture in air-flow, drying device or condensing unit (being not drawn in way) also can be set on described air inlet 501, this drying device is the internal sealed box equipped with desiccant particle, described desiccant particle can be physisorption type desiccant, such as silica gel, molecular sieve desiccant etc., it is alternatively chemisorbed type desiccant, such as calcium chloride or calcium sulfate etc.；Described condensing unit is common condensing tube.
In the structure shown in Figure 10, first external partition 101 and the second external partition 102 use directly as the sidewall of shell 50, but this it is not necessary to, the sidewall of shell can be separately provided in other embodiments, and the first external partition 101 and the second external partition 102 are directly against the inner side being combined in its sidewall.Time on the sidewall of shell 50 directly against composite electrode unit 20, its surface should be made up of insulating material, and this insulating material includes at least one in plastics and acrylic board.In other cases, shell can also be metal material or semi-conducting material.
Shell 50 is demountable structure, in order to carry out the cleaning of flexible diaphragm 30, electrode unit 20 or deflector 60.The shape of shell 50 is at this and is not specifically limited, although the shell cross section shown in Figure 10 is rectangle, but can be adjusted according to airflow condition and installation site in actual use, such as can adopt structure as shown in figure 12, the structure of class frustum type it is respectively adopted, to adjust air-flow at gas inflow end and gas outflow end.
Consider before air-flow enters electrode unit group, the particulate matter that volume in air-flow is bigger to be filtered, filter screen can be installed between air inlet 501 and deflector 60.Described filter screen can be metal screen, it is also possible to be made up of nonmetallic materials.
Regardless of whether arrange deflector 60, air inlet 501 and gas outlet 502 all can at the homonymies of shell 50, it is also possible at the not homonymy of shell 50, it is possible to be designed according to the facilities of shell 50 shape and deflector 60.
According to above-mentioned gas cleaning plant, the present invention also provides for a kind of motor-vehicle tail-gas purifying device, is made up of any one gas cleaning plant aforesaid, wherein for the embodiment without shell 50, may be mounted at the inside of motor vehicle exhaust, by automobile exhaust pipe as its shell；For comprising the embodiment of shell 50, the air vent of air inlet 501 with motor vehicles can be directly connected to, the tail gas discharged during motor vehicles work will be directly entered purifier by air inlet, the flexible diaphragm 30 in purifier is driven to vibrate, constitute friction generator with electrode unit 20 to generate electricity, produce high voltage electric field, the particulate matter in gas is carried out Electrostatic Absorption, to reach the purpose of gas purification.
Therefore, the gas dust-removing device of the known present invention has the advantages such as cost is low, pollution-free, adsorption efficiency is high and can be recycled, it is applied on motor vehicles, it is possible to PM1.0, PM2.5, PM5.0 and the PM10.0 etc. in vehicle exhaust cause the particulate matter of haze carry out effectively absorbing and filtering.
Embodiment
Electrode unit group number: 3 × 4 × 4=48；Flexible diaphragm is made up of the flexible polyimide (kapton write a Chinese character in simplified form in English) of 100 μm, and kapton surface etches nanostructured by ICP, size: 1.9cm × 3.4cm × 1.9cm；First external partition, the second external partition, central dividing plate and insulation barrier are made up of the acrylic board of thickness 2mm, and electrode unit uses 0.2mm metallic aluminium；Deflector uses thickness 3mm acrylic board and has diameter 4mm gas port 12 on surface, and whole shell is made up of metal aluminum foil (0.4mm)；Air inlet and gas outlet diameter 2cm.
Filter effect: more than the voltage 400V that single electrode unit group and flexible vibration are intermembranous, to PM2.5, PM5.0, PM10.0 filter efficiency of vehicle exhaust more than 85%.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing; but; the present invention is not limited to the detail in above-mentioned embodiment; in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention.Such as, the change of the shape of each parts, material and size.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode.In order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by the present invention separately.
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (29)
1. a gas cleaning plant, it is characterised in that including:
First external partition, the second external partition, the electrode unit of more than 2, the flexible diaphragm of more than 2 and film fixture；
Described first external partition and the face-to-face interval of the second external partition are arranged, and middle space forms gas flow；
Described first external partition and the second external partition are fitted with described electrode unit on the side of described gas flow, each electrode unit is in relative bulkhead sides, all have a size and shape to be the same from electrode unit right opposite interval with it to arrange, form an electrode unit group, be dielectrically separated between each electrode unit group；
Each described electrode unit group is mated in described gas flow and is arranged a described flexible diaphragm, one end of described flexible diaphragm is fixed on described film fixture, the other end along gas flow direction is free end so that described flexible diaphragm can come in contact with 2 electrode unit surfaces of respective electrode unit group and separate under the effect of gas；
The surfacing of described electrode unit has different triboelectric characteristics from the surfacing of described flexible diaphragm.
2. device according to claim 1, it is characterized in that, also include some central dividing plates, described central dividing plate is disposed between described first external partition and the second external partition, forming the gas flow of more than 2, be fitted with described electrode unit in the both sides of described central dividing plate, each electrode unit is in relative bulkhead sides, all there are a size and shape to be the same from electrode unit right opposite interval with it to arrange, form an electrode unit group.
3. device according to claim 1 and 2, it is characterised in that relative distance between dividing plate described in any two and adjustable angle.
4. the device according to any one of claim 1-3, it is characterised in that all described dividing plates be arranged in parallel.
5. device according to claim 4, it is characterised in that the size and dimension of each described central dividing plate is identical, and the spacing between adjacent two dividing plates is identical.
6. the device according to any one of claim 1-5, it is characterised in that the surface of described dividing plate is made up of insulant.
7. the device according to any one of claim 1-6, it is characterised in that the material selected from metal of described electrode unit, conductive oxide or organic conductor.
8. the device according to any one of claim 1-7, it is characterised in that the thickness of described electrode unit is 20nm-2mm.
9. the device according to any one of claim 1-8, it is characterised in that the shape of each described electrode unit is identical.
10. device according to claim 9, it is characterised in that described electrode unit is projected as rectangle on the dividing plate fitted, and length-width ratio is be more than or equal to 2:1, is wherein length direction along gas flow direction.
11. the device according to claim 9 or 10, it is characterised in that each described electrode unit equivalently-sized.
12. according to the device described in any one of claim 1-11, it is characterised in that on same dividing plate, each described electrode unit is determinant array distribution, wherein gas flow direction is column direction.
13. device according to claim 12, it is characterised in that the insulation barrier with described divider upright is set in the both sides of electrode unit described in every string.
14. device according to claim 13, it is characterised in that described gas flow is divided into some independent branch flow passage by described insulation barrier.
15. according to the device described in any one of claim 1-14, it is characterised in that in each described electrode unit group, two relative electrode unit spacing are 0.2cm-5cm.
16. according to the device described in any one of claim 1-15, it is characterised in that the surface of described flexible diaphragm is insulant.
17. according to the device described in any one of claim 1-16, it is characterised in that the thickness of described flexible diaphragm is 1 μm of-1mm.
18. according to the device described in any one of claim 1-17, it is characterised in that described flexible diaphragm is rectangle towards the surface of described electrode unit, its length-width ratio is be more than or equal to 2:1, and wherein gas flow direction is length direction.
19. according to the device described in any one of claim 1-18, it is characterized in that, the surface that described flexible diaphragm contacts with described electrode unit processes through polarization, and/or, surface configuration has micro structure, and this micro structure is for increasing effective contact area of described flexible diaphragm and described electrode unit.
20. according to the device described in any one of claim 1-19, it is characterised in that the distance between each described film fixture and two adjacent separator constituting described gas flow is identical.
21. device according to claim 20, it is characterised in that described film fixture includes rotating shaft and clamping plate, described Boards wall is in rotating shaft and can rotate around rotating shaft, and described flexible diaphragm is connected with described film fixture by described clamping plate.
22. according to the device described in any one of claim 1-21, it is characterised in that also include deflector, enter the direction of described gas flow for adjusting gas.
23. according to the device described in any one of claim 1-22, it is characterised in that also include shell, described shell has air inlet, gas outlet and cavity, and described first external partition, the second external partition and central dividing plate are positioned at described cavity.
24. device according to claim 22, it is characterised in that also include shell, described shell has air inlet, gas outlet and cavity, and described first external partition, the second external partition, central dividing plate and deflector are positioned at described cavity.
25. the device as described in claim 23 or 24, it is characterised in that be provided with filter screen between described air inlet and deflector.
26. according to the device described in any one of claim 23-25, it is characterised in that described shell is made up of insulating material.
27. according to the device described in any one of claim 1-26, it is characterised in that described shell is demountable structure.
28. a motor-vehicle tail-gas purifying device, it is characterised in that include arbitrary described gas cleaning plant in claim 1 to 22.
29. a motor-vehicle tail-gas purifying device, it is characterised in that including the gas cleaning plant described in any one of claim 23 to 27, wherein said air inlet is connected with the air vent of described motor vehicles.
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| CN201410778602.XA CN105756750B (en) | 2014-12-15 | 2014-12-15 | A kind of gas cleaning plant |
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| CN201410778602.XA CN105756750B (en) | 2014-12-15 | 2014-12-15 | A kind of gas cleaning plant |
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