CN207970700U - A kind of waste gas purification apparatus - Google Patents

Abstract

The utility model discloses a kind of waste gas purification apparatuses; including babinet; babinet one end is equipped with air inlet, and the other end is equipped with gas outlet, from air inlet to being disposed with protective cover, exhausting part, equal drift net, primary filter, plasma generator and photocatalysis treatment device between gas outlet in babinet；Photocatalysis treatment device includes at least two groups microwave electrodeless lamp component, the microwave generator being connect with microwave electrodeless lamp component one end and honeycomb catalyst plate, and nano titanic oxide catalyst layer is coated on catalytic plate；The top plate of babinet and the right and left of bottom plate are correspondingly arranged the mounting groove for the side plate for being useful for installation casing.Waste gas purification apparatus is for handling volatile organic compound from waste gas; it includes protective cover, exhausting part, equal drift net, primary filter, plasma generator and photocatalysis treatment device; most of organic substance in exhaust gas is broken down into the simple harmless compound such as water, carbon dioxide, to achieve the purpose that thoroughly to be effectively treated and purifying industrial waste gases.

Description

A kind of waste gas purification apparatus

Technical field

The utility model is related to chemical emission process fields, in particular to a kind of waste gas purification apparatus.

Background technology

With the development of science and technology, urbanization is increasingly accelerated, and population gradually increases, in order to meet the need of population development It asking, the range and its scale of various factories also expand constantly, and the industrial waste gas of generation produces serious pollution to environment, Be detrimental to health ecological environment.

Industrial waste gas refers to generated in plant area of enterprise fuel combustion and production process various and is discharged into containing for air The general name of polluted gas.Industrial waste gas is mainly that carbon disulfide, hydrogen sulfide, nitrogen oxides, carbon monoxide and volatile organic are useless Gas etc..

For environmental protection, atmosphere pollution is avoided, the industrial waste gas containing pernicious gas needs to carry out at purification before being discharged into air Reason, makes to be discharged into pernicious gas amount or harmful gas concentration in air and must not exceed numerical value as defined in discharge standard.

Currently, the purification method of industrial waste gas have it is multiple, such as：Combustion method, absorption process, absorption method, condensation method etc..Due to Industry Waste is large-minded, is difficult to achieve the purpose that economic, effective purifying industrial waste gases using above-mentioned conventional chemically or physically method, The problem of also will produce secondary pollution, cannot be satisfied qualified discharge.

Utility model content

In view of this, a kind of waste gas purification apparatus provided by the utility model, preferably overcomes the above-mentioned prior art and deposits The problem of and defect, cooperated with each other by primary filter, plasma generator and photocatalysis treatment device, to reach The purpose with purifying industrial waste gases is effectively treated, and not will produce secondary pollution, realizes nontoxic, innoxious.

A kind of waste gas purification apparatus, including babinet, described babinet one end are equipped with air inlet, and the other end is equipped with gas outlet, institute It states in babinet from the air inlet to being disposed with protective cover, exhausting part, equal drift net, primary filter between the gas outlet Device, plasma generator and photocatalysis treatment device；The photocatalysis treatment device include at least two groups microwave electrodeless lamp component, The microwave generator and honeycomb catalyst plate being connect with microwave electrodeless lamp component one end are coated on the catalytic plate Nano titanic oxide catalyst layer；

The top plate of the babinet and the right and left of bottom plate are correspondingly arranged the peace for the side plate for being useful for installing the babinet Tankage.

Further, in the present invention, microwave electrodeless lamp component described in every group includes more along arranged in parallel Microwave electrodeless lamp pipe, each microwave electrodeless lamp pipe is arranged across the babinet both sides.

Further, in the present invention, the quantity of the catalytic plate is multiple, is respectively arranged at two adjacent groups microwave Between electrodeless ultraviolet lamp component and both sides.

Further, in the present invention, the protective cover is removably installed in the air inlet, the protective cover Equipped with clamping button, the air inlet is equipped with buckling groove corresponding with the clamping button.

Further, in the present invention, the cabinet front face is provided with control cabinet, is provided in the control cabinet Power supply, the power supply are electrically connected with the microwave electrodeless lamp component and the microwave generator.

Further, in the present invention, be provided on the chamber door of the control cabinet master switch being connect with power supply and Power supply indicator.

Further, in the present invention, the control cabinet is built-in with ballast.

Further, in the present invention, the side of the control cabinet is both provided with several heat emission holes.

Further, in the present invention, the primary filter is HEPA high efficiency particulate air filters.

Further, in the present invention, further include activated carbon filter layer, the activated carbon filter layer is set to described equal Between drift net and the primary filter, the bottom plate of the babinet is equipped with support portion, and the top of the babinet is equipped with handle.

A kind of waste gas purification apparatus provided by the utility model is for handling volatile organic compound from waste gas comprising protects Shield, exhausting part, equal drift net, primary filter, plasma generator and photocatalysis treatment device, by primary filter, etc. from Electronic generator and photocatalysis treatment device cooperate with each other, and industrial waste gas is made to be filtered out from primary filter after equal drift net flows Enter plasma generator after molecule, plasma generator organic matter difficult to degrade is decomposed into harmless small point by macromolecular The harmless substance of chemical reaction generation occurs for son, and subsequent industrial waste gas enters in photocatalysis treatment device, photocatalysis treatment device In microwave generator caused by a large amount of microwaves form microwave field in box house, excitation microwave electrodeless lamp generates ultraviolet Light beam makes the molecular link of the bacterium in exhaust gas by ultraviolet light beam under the synergistic effect of the nano-titanium dioxide of catalytic plate load Cracking, meanwhile, which also decomposes oxygen molecule in air and generates free oxygen, and free oxygen and oxygen molecule are further combined with production Most of organic substance in exhaust gas is broken down into water, carbon dioxide by the raw ozone to organic matter with extremely strong oxidation Deng simple harmless compound, to achieve the purpose that thoroughly to be effectively treated and purifying industrial waste gases, and secondary dirt not will produce Dye is realized nontoxic, innoxious；In addition, the top plate and bottom plate of babinet are equipped with the mounting groove of installation side plate, therefore, the top plate of babinet, Side plate can be disassembled from bottom plate, be cleared up convenient for the component to box house.

Waste gas purification apparatus provided by the utility model has compact overall structure, and floor space is small, and purification efficiency is high, if Received shipment row feature at low cost.

To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment cited below particularly, and The appended attached drawing of cooperation, is described in detail below.

Description of the drawings

It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is a kind of overall schematic of waste gas purification apparatus of the utility model；

Fig. 2 is a kind of vertical view internal structure schematic diagram of waste gas purification apparatus of the utility model.

Drawing reference numeral explanation：

100- waste gas purification apparatuses；10- babinets；11- air inlets；111- buckling grooves；The gas outlets 12-；13- top plates；14- Bottom plate；15- side plates；16- support portions；

20- protective covers；21- clamping buttons；30- exhausting parts；The equal drift nets of 40-；50- primary filters；

60- plasma generators；61- plasma electric fields；611- cylinders；

70- photocatalysis treatment devices；

71- microwave electrodeless lamp components；711- microwave electrodeless lamp pipes；72- microwave generators；73- catalytic plates；

80- activated carbon filter layers；

90- control cabinets；91- power supplys；92- is switched；93- power supply indicators；94- ballasts；95- heat emission holes.

Specific implementation mode

Hereinafter, the various embodiments of the disclosure will be described more fully in conjunction with attached drawing.The disclosure can have various realities Example is applied, and can adjust and change wherein.Therefore, it will in more detail be retouched with reference to the specific embodiment being shown in the accompanying drawings State the disclosure.It should be understood, however, that：There is no the meanings that the various embodiments of the disclosure are limited to specific embodiment disclosed herein Figure, but the disclosure should be interpreted as covering all adjustment in the spirit and scope for the various embodiments for falling into the disclosure, etc. Jljl and/or alternative.Description taken together with the accompanying drawings, the same element of same reference numerals.

Hereinafter, disclosed in the term " comprising " that can be used in the various embodiments of the disclosure or " may include " instruction Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.

In the various embodiments of the disclosure, it includes listing file names with to state "or" or " at least one of A or/and B " Any combinations of word or all combinations.For example, statement " A or B " or " at least one of A or/and B " may include A, Ke Bao It includes B or may include A and B both.

The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified in various implementations Various constituent element in example, but respective sets can not be limited into element.For example, presented above be not intended to limit the suitable of the element Sequence and/or importance.The purpose presented above for being only used for differentiating an element and other elements.For example, the first user fills It sets and indicates different user device with second user device, although the two is all user apparatus.For example, not departing from each of the disclosure In the case of the range of kind embodiment, first element is referred to alternatively as second element, and similarly, second element is also referred to as first Element.

It should be noted that：It, can be by the first composition member if a constituent element ' attach ' to another constituent element by description Part is directly connected to the second constituent element, and " connection " third can be formed between the first constituent element and the second constituent element Element.On the contrary, when a constituent element " being directly connected to " is arrived another constituent element, it will be appreciated that in the first constituent element And second third constituent element is not present between constituent element.

The term used in the various embodiments of the disclosure is used only for the purpose of describing specific embodiments and not anticipates In the various embodiments of the limitation disclosure.As used herein, singulative is intended to also include plural form, unless context is clear Chu it is indicated otherwise.Unless otherwise defined, otherwise all terms (including technical terms and scientific terms) used herein have There is meaning identical with the various normally understood meanings of embodiment one skilled in the art of the disclosure.The term (term such as limited in the dictionary generally used) is to be interpreted as having and situational meaning in the related technical field Identical meaning and the meaning that Utopian meaning or too formal will be interpreted as having, unless in the various of the disclosure It is clearly defined in embodiment.

Embodiment 1

A kind of waste gas purification apparatus 100, including babinet 10,10 one end of the babinet are equipped with air inlet 11, and the other end is equipped with Gas outlet 12, from the air inlet 11 to being disposed with protective cover 20, exhausting between the gas outlet 12 in the babinet 10 Part 30, equal drift net 40, primary filter, plasma generator 60 and photocatalysis treatment device 70；The photocatalysis treatment device 70 wraps The microwave transmitter for including at least two groups microwave electrodeless lamp component 71, being connect with described 71 one end of microwave electrodeless lamp component 72 and honeycomb catalyst plate 73, nano titanic oxide catalyst layer is coated on the catalytic plate 73；

The top plate 13 of the babinet 10 and the right and left of bottom plate 14 are correspondingly arranged and are useful for installing the babinet 10 The mounting groove of side plate 15.

It should be noted that the section of above-mentioned babinet 10 can be round or rectangular.Above-mentioned catalytic plate 73 can be honeycomb aluminum Plate is evenly distributed with a large amount of hole on honeycomb aluminum plate, has many advantages, such as light-weight, fire prevention, corrosion-resistant and environmentally friendly.Catalytic plate 73 use honeycomb aluminum plate, on the one hand can save material, reduce manufacturing cost；On the other hand, the work of uniform gas distribution can be played With making external exhaust gas be adequately broken uniformly through honeycomb aluminum plate.The thickness of the nano titanic oxide catalyst layer is preferred For 100-200nm.

It is to be appreciated that in photocatalysis oxidation reaction, ultraviolet light is produced on nanometer titanium dioxide C catalyst layer Raw electron hole pair, the hydroxyl free radical for generating oxidisability wave very living is reacted with the moisture content (H2O) of adsorption and oxygen (O2) (OH-) and Superoxide anion free radical (O2-, 0-).Various waste odour-gas bodies such as aldehydes, benzene class, Ammonia, amine, phenols, nitrogen oxidation Object, sulfide, other hydrocarbons and its VOC type organic are reduced into carbon dioxide under the action of photochemical catalytic oxidation (CO2), water (H2O) and other nontoxic substances.

Nano-titanium dioxide has the characteristics that oxidisability is strong as semiconductor light-catalyst, certain for being difficult to aoxidize to ozone A little organic matter such as chloroform, four chlorination charcoals, hexachloro-benzenes can be decomposed effectively, have spy to the organic matter for being difficult to degrade Other meaning, light-catalysed efficient oxidation agent are hydroxyl free radical (OH-) and Superoxide anion free radical (O2-, 0-), oxidisability Higher than common ozone, hydrogen peroxide, potassium permanganate, hypochlorous acid etc..

Moreover, nano-titanium dioxide is all effective to the huge number organic matter from hydrocarbon to carboxylic acid, even if to atom organic matter If halogenated hydrocarbons, dyestuff, itrogenous organic substance, organophosphorus insecticide also have good removal effect, as long as anti-by certain time It should can reach and be fully cleaned up.In addition, the service life of nano titanic oxide catalyst is endless, nothing needs to change.

The photocatalysis treatment device 70 of the utility model can also play the effect of disinfection while going to eliminate the unusual smell, and And due to during photocatalysis oxidation reaction without any additive, so not will produce secondary pollution.

The workflow of the emission-control equipment of the utility model embodiment is as follows：

First, exhaust gas is inputted in babinet 10 by the protective cover 20 on air inlet 11, is needed due to the effect of exhausting part 30 It further illustrates, exhausting part 30 can be blade fan.Into after babinet 10, exhaust gas first passes through equal drift net 40, makes defeated The exhaust gas diffusion entered is uniform, and then exhaust gas is by the primary filter in babinet 10, by dust particles and the exhaust gas in exhaust gas into Row separation, to carry out subsequent processing.

Exhaust gas enters plasma humorously in device after primary filter, plasma humorously device generate plasma and to by it is useless Gas is bombarded, and plasma and the exhaust gas of high energy interact, and organic pollution difficult to degrade is made to be decomposed into nothing by macromolecular Harmful small molecule or generation chemical reaction generates harmless substance.Specifically, device is equipped with plasma electric field 61 to plasma humorously, Plasma electric field 61 is equipped with multiple cylinders 611, and the exhaust gas filtered through primary filter 50 enters from one end of cylinder 611, gives up Molecule in gas is discharged by plasma bombardment from the other end of cylinder 611 after oxygenolysis in the inner cavity of cylinder 611.

Enter photocatalysis treatment device 70, the catalytic plate in photocatalysis treatment device 70 through the plasma exhaust gas that device is handled humorously A large amount of microwaves caused by 73 form microwave field inside babinet 10, which generates ultraviolet light Beam makes the molecular link of the bacterium in exhaust gas by ultraviolet light beam under the synergistic effect for the nano-titanium dioxide that catalytic plate 73 loads Cracking, meanwhile, which also decomposes oxygen molecule in air and generates free oxygen, and free oxygen and oxygen molecule are further combined with production Most of organic substance in exhaust gas is broken down into water, carbon dioxide by the raw ozone to organic matter with extremely strong oxidation Deng simple harmless compound.Then, exhaust gas containing organic pollution difficult to degrade continues again by diatom filter layer into one Peculiar smell is eliminated in step absorption, is obtained pure air and is discharged by gas outlet 12, is given up with purified industrial to reach thoroughly to be effectively treated The purpose of gas, and secondary pollution is not will produce, it realizes nontoxic, innoxious.

It should be further noted that protective cover 20 can be cellular protective cover 20, prevent people or the object in the external world from stretching Enter interior to babinet 10 and is injured.

The top plate 13 of the babinet 10 and the right and left of bottom plate 14 are correspondingly arranged and are useful for installing the babinet 10 The mounting groove of side plate 15.

In addition, the top plate 13 and bottom plate 14 of babinet 10 are equipped with the mounting groove of installation side plate 15.First, two sides of babinet 10 The bottom of plate 15 is respectively placed on the mounting groove of 14 the right and left of bottom plate；Secondly, the peace of 13 the right and left of top plate of babinet 10 Tankage is positioned over the top of two side plates 15.Therefore, 13, two side plates 15, top plates 13 of the top plate of babinet 10 form complete case Body 10.Certainly, installing integral babinet 10 can also disassemble, in order to clear up the component inside babinet 10. For example, when waste gas purification apparatus 100 runs certain time, primary filter, plasma generator 60 have accumulated certain ash Dirt or harmful substance under at this time can dismantling the top plate 13 of babinet 10, side plate 15, to primary filter replace or clear It washes, plasma generator 60 carries out cleaning dedusting etc..

In the present embodiment, microwave electrodeless lamp component 71 described in every group includes more along micro-wave nonpolar arranged in parallel Ultraviolet lamp tube 711, each microwave electrodeless lamp pipe 711 are arranged across 10 both sides of the babinet.

The microwave electrodeless lamp component 71 can be enumerated as two groups, three groups, four groups, five groups, six groups etc., and be mutually parallel Arrangement.Preferably, several 711 parallel arrangements of microwave electrodeless lamp pipe, and it is parallel with catalytic plate 73.

The microwave electrodeless lamp pipe 711 can be enumerated as 3,4,5,6 etc., microwave electrodeless lamp pipe 711 It can be in straight-tube shape or in the shape of a spiral etc..The spacing of adjacent two microwave electrodeless lamp pipes 711 can be set as 12-15cm, certainly The spacing between fluorescent tube can also be adjusted according to actual needs.By by photocatalysis treatment device 70 in the utility model embodiment Air flue arrangement of the microwave electrodeless lamp pipe 711 between air inlet 11 to gas outlet 12, and arrangement spacing is rationalized, with Smaller space reaches to the higher degradation efficiency of volatile organic matter.

In the present embodiment, the quantity of the catalytic plate 73 is multiple, and it is ultraviolet to be respectively arranged at two adjacent groups micro-wave nonpolar Between lamp group part 71 and both sides.

It is to be appreciated that by being arranged multiple catalytic plates 73 in the utility model embodiment, and two adjacent groups microwave without One catalytic plate 73 is respectively set between extreme ultraviolet lamp group part 71, and in microwave electrodeless lamp component 71 close to primary filter one A catalytic plate 73 is also respectively arranged in device side humorously for side and close plasma, makes thin in the exhaust gas by photocatalysis treatment device 70 Bacterium and organic pollution etc. can be decomposed more completely and more fully.

In the present embodiment, the protective cover 20 is removably installed in the air inlet 11, and the protective cover 20 is equipped with Clamping button 21, the air inlet 11 are equipped with buckling groove corresponding with the clamping button 21 111.

Above-mentioned, protective cover 20 is removably installed in air inlet 11, therefore, when needing 10 inner cavity of cleaning case, Protective cover 20 can be removed, the exhausting part 30 after protective cover 20 is cleared up.

In the present embodiment, 10 leading flank of the babinet is provided with control cabinet 90, and power supply is provided in the control cabinet 90 91, the power supply 91 is electrically connected with the microwave electrodeless lamp component 71 and the microwave transmitter 72.

In the present embodiment, it is provided with the master switch 92 being connect with power supply 91 on the chamber door of the control cabinet 90 and power supply refers to Show lamp 93.

In the present embodiment, the control cabinet 90 is built-in with ballast 94.

It is to be appreciated that the ballast 94 is used to be grouped the quantity of control fluorescent tube.It can also be in the control cabinet 90 Outside is provided with red green indicator light.Described two indicator lights are used to indicate the shape of microwave electrodeless lamp pipe 711 and ballast 94 State.Such as two indicator lights are respectively red indicating light, green indicator light, when red indicating light and aluminium color indicator light bright epoch Table microwave electrodeless lamp pipe 711 and ballast 94 are all intact；When only green indicator light is bright, red indicating light goes out Shi representatives Microwave electrodeless lamp pipe 711 damages, and ballast 94 is intact；When only red indicating light is bright, represented when green indicator light goes out micro- Wave electrodeless ultraviolet lamp pipe 711 is intact, and ballast 94 damages, convenient for finding microwave electrodeless lamp pipe 711 and ballast 94 in time Whether damage, can be convenient to overhaul, replace accessory.

In the present embodiment, the side of the control cabinet 90 is both provided with several heat emission holes 95.

It is understood that in the utility model embodiment by the side of control cabinet 90 preferably in arranged on left and right sides face Several heat emission holes 95 are respectively provided with, the heat generated in control cabinet 90 is enable to shed in time from heat emission hole 95, effectively extend control The service life of ballast 94 etc. in case 90 and control cabinet 90 processed.

In the present embodiment, the primary filter is HEPA high efficiency particulate air filters.

HEPA high efficiency particulate air filters also known as high efficiency particle air filter reach the filter of HEPA standards, its main feature is that air can To pass through, but tiny particle can not pass through；It removes a diameter of 0.3 micron (the 1/200 of hair diameter) particle below It is the most effective filtering medium of the pollutants such as smog, dust and bacterium except efficiency can reach 99.97% or more.HEPA divides PP Filter paper, glass fibre, compound PP PET filter paper, melt-blown terylene non-woven fabric and melt-blown five kinds of materials of glass fibre.The efficient mistakes of HEPA Filter has the advantages that windage is big, dust containing capacity is big, filtering accuracy is high, can be processed into various sizes and shape as needed.

In the present embodiment, further include activated carbon filter layer 80, the activated carbon filter layer 80 is set on the equal drift net 40 And between the primary filter 50, the bottom plate 14 of the babinet 10 is equipped with support portion 16, and the top of the babinet 10, which is equipped with, to be carried Hand.

Above-mentioned, activated carbon filter layer 8080 can carry out initial absorption to the exhaust gas to come to equal drift net 4040, mainly For absorbing peculiar smell.The top of babinet 10, that is to say can be equipped with handle on the top plate 13 of babinet 10, in order to the present embodiment Carrying for waste gas purification apparatus 100 refer to and moving.

It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book With the other embodiment of understanding.

Utility model voice is bright, and the utility model is by the series of detailed descriptions listed above only for this The feasible embodiment of utility model illustrates, but the utility model is not limited to above-mentioned detailed process equipment and work Skill flow.And do not mean that the utility model should rely on above-mentioned detailed process equipment and technological process and could implement.It is affiliated Those skilled in the art it will be clearly understood that any improvement to the utility model, to each raw material of the utility model product etc. Effect is replaced and the addition of auxiliary element, the selection etc. of concrete mode, all falls within the scope of protection of the utility model and the open scope Within.

Claims (10)

1. a kind of waste gas purification apparatus, including babinet, described babinet one end is equipped with air inlet, and the other end is equipped with gas outlet, special Sign is, in the babinet from the air inlet to be disposed between the gas outlet protective cover, exhausting part, equal drift net, Primary filter, plasma generator and photocatalysis treatment device；The photocatalysis treatment device includes that at least two groups micro-wave nonpolar is purple Outer lamp group part, the microwave generator being connect with microwave electrodeless lamp component one end and honeycomb catalyst plate, the catalysis Nano titanic oxide catalyst layer is coated on plate；

The top plate of the babinet and the right and left of bottom plate are correspondingly arranged the mounting groove for the side plate for being useful for installing the babinet.

2. waste gas purification apparatus according to claim 1, which is characterized in that microwave electrodeless lamp component packet described in every group More are included along microwave electrodeless lamp pipe arranged in parallel, each microwave electrodeless lamp pipe is arranged across the babinet both sides.

3. waste gas purification apparatus according to claim 1, which is characterized in that the quantity of the catalytic plate is multiple, difference It is set between two adjacent groups microwave electrodeless lamp component and both sides.

4. waste gas purification apparatus according to claim 1, which is characterized in that the protective cover is removably installed in described Air inlet, the protective cover are equipped with clamping button, and the air inlet is equipped with buckling groove corresponding with the clamping button.

5. waste gas purification apparatus according to claim 1, which is characterized in that the cabinet front face is provided with control cabinet, Power supply is provided in the control cabinet, the power supply is electrically connected with the microwave electrodeless lamp component and the microwave generator It connects.

6. waste gas purification apparatus according to claim 5, which is characterized in that be provided on the chamber door of the control cabinet and electricity The master switch and power supply indicator of source connection.

7. waste gas purification apparatus according to claim 5, which is characterized in that the control cabinet is built-in with ballast.

8. waste gas purification apparatus according to claim 5, which is characterized in that the side of the control cabinet is both provided with several Heat emission hole.

9. waste gas purification apparatus according to claim 1, which is characterized in that the primary filter is HEPA high efficiency filters Device.

10. waste gas purification apparatus according to claim 1, which is characterized in that further include activated carbon filter layer, the activity Charcoal filter layer is set between the equal drift net and the primary filter, and the bottom plate of the babinet is equipped with support portion, the babinet Top be equipped with handle.