CN206214907U - Filtering material and the filter element using the filtering material - Google Patents
Filtering material and the filter element using the filtering material Download PDFInfo
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- CN206214907U CN206214907U CN201620384220.3U CN201620384220U CN206214907U CN 206214907 U CN206214907 U CN 206214907U CN 201620384220 U CN201620384220 U CN 201620384220U CN 206214907 U CN206214907 U CN 206214907U
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Abstract
The utility model discloses a kind of filtering material and the filter element using the filtering material.Filtering material includes porous material base material, and hot-spraying coating is attached with the pore surface of base material, and solid particle is distributed with hot-spraying coating.Hot-spraying coating can effectively reduce aperture on the premise of the quantity in hole is not changed, and filtering accuracy is lifted on the premise of porosity higher is kept.Solid particle not only forms secondary hole, and be obviously improved the specific surface area of filtering material in hot-spraying coating surface sediment；Compared with smooth coating, the coating containing solid particle can make the aperture of filtering material reach nanoscale and keep porosity higher.The formability of gained filtering material is good, intensity is high, therefore can be made variously-shaped filter element.Compared with accordingly base material, the average pore size of filtering material is substantially reduced, and filtering accuracy is higher, can meet indoor air purification quality requirement.
Description
Technical field
The utility model is related to a kind of filtering material and the filter element using the filtering material.
Background technology
The method in prior art control aperture is mainly and is used by changing the collocation between powder morphology, different-grain diameter powder
Realize that the preparation technology parameters such as the regulation and control to aperture, price adjustment rolling mill practice, sintering schedule regulate and control.But change powder changing
Porosity while aperture to film has considerable influence, and whole Pore structure and morphology and tortuosity etc. will all change.It is logical
Oversintering system adjustment aperture, the requirement to thermal field is higher, and the hole of aperture≤5 μm is easily closed under conditions of temperature is higher
Closed pore is formed, to needing the requirement for preparing small-bore membrane material to be difficult to meet, through-hole rate reduces air permeability and declines；For example, with-
The electrolytic nickel powder of 400 mesh is multicellular metal foil prepared by raw material, and aperture is 15-20 μm, flux >=3000m3/m2·h·kpa；With
5-10 μm of electrolytic nickel powder is multicellular metal foil prepared by raw material, and aperture is 5-10 μm, flux about 300m3/m2·h·kpa；With
10-15 μm of carbonyl nickel powder is multicellular metal foil prepared by raw material, and aperture is 14-18 μm, flux about 2000m3/m2Hkpa,
Aperture flux while being greatly reduced is limited.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of filtering material and preparation method thereof, the filtering material
Aperture it is smaller, porosity is high and preparation method is simple.The utility model is also provided using the filter element of the filtering material.
The technical scheme that the utility model solution above-mentioned technical problem is used is a kind of filtering material, the filtering material
Including porous material base material, hot-spraying coating is attached with the pore surface of porous material base material, divided on the hot-spraying coating
It is furnished with solid particle.When hot-spraying coating is attached to the pore surface of porous material base material, the quantity in hole can not changed
On the premise of effectively reduce aperture, lift filtering accuracy on the premise of porosity higher is kept.Solid particle is in thermal spraying
Coating surface is piled up, and not only forms secondary hole, and be obviously improved the specific surface area of filtering material；If hot-spraying coating
Smooth and thicker, then coating is easy to fall off and causes to block hole, therefore the aperture of final filtration material is difficult to reach nanoscale.With
Smooth coating is compared, and the coating containing solid particle can make the aperture of filtering material reach nanoscale and keep hole higher
Gap rate.
Further, the porous material base material is foam metal.Further, the foam metal is nickel foam, nickel foam
Any one in alloy, foam copper, foam copper alloy, foamed aluminium, foam aluminium alloy.Foam metal is a kind of with superelevation hole
The three-dimensional netted material of gap rate, but its larger aperture limits its application.Because the aperture of foam metal is larger therefore many
Porous materials base material can be more preferably the foam metal after compressing.Further, the porous material base material is steeped by least two-layer
Foam metal stacked compression is formed.The average pore size of the foam metal is 0.01-0.5mm, and porosity is 60-95%.
Further, the boil down to rolling.When the porous material base material is formed by one layer of foam metal rolling, pass through
The aperture of rolling porous membrane and thickness distribution are uniform.When the porous material base material is folded by least two layers of foam metal
Plus rolling is when forming, by rolling porous membrane, not only aperture and thickness distribution are uniform, and each layer foam metal it
Between adhesion it is stronger, be not easily stripped.Further, the rolling is hot rolling or cold rolling.
Further, the pressure of the rolling is 50-600T (1T is equal to 133.322Pa).Draught pressure is excessive, may cause
The hole of final filtration material is too small, and when filtering material is thicker, filtration resistance is dramatically increased.Draught pressure is too small, not only hole
The adhesion that footpath is difficult to reach between requirement, and adjacent foam metal is poor.The pressure of the rolling is preferably 200-400T.It is logical
The size of draught pressure is overregulated, the filtering material of different pore size can be prepared, the filtering material of different pore size can enter one
Step composition multistage filtering element.
Further, the porous material base material is by solid solution alloy, the metal simple-substance of face-centred cubic structure or body-centered cubic
The metal simple-substance of structure is made up of the metal polyporous material of matrix phase, and it is the Chinese patent of CN104759629A with publication No.
The preparation method of the flexible, porous metal film described in application is similar or is made of existing other similar approach.It is above-mentioned porous
Material is because of the limitation of its preparation technology, and its aperture is generally large, and when indoor air purification is applied to, filtering accuracy is poor, it is difficult to
Meet indoor air purification quality requirement.Using the above method, with the porous material as base material, by the hole table in base material
Face increases hot-spraying coating, the aperture of base material can be effectively reduced, so as to lift its filtering accuracy.Further, the porous material
The average pore size for expecting base material is 5-100 μm, and porosity is 25-70%.
Further, the coating includes any one in nickel-base alloy, ferrous alloy, cobalt-base alloys.Above-mentioned coating material
The physicochemical stability of material is good, can be obviously improved the service life of porous material base material and use scope.
Further, the solid particle is silicon and its oxide (such as Si, SiO2), aluminium and its oxide (such as Al, Al2O3、
AlO2), Cu and its oxides (such as Cu, CuO), nickel and its oxide (such as Ni, NiO), iron and its oxi (such as Fe, Fe2O3、
Fe3O4), titanium and its oxide (such as Ti, TiO2) at least one；The physicochemical stability of this kind of solid particle is good, service life
It is long, when the solid particle is TiO2When, can be combined with light-catalyzed reaction, play the effect of sterilization.
Further, the average grain diameter of the solid particle is 1-19 μm.If the particle diameter of solid particle is excessive, may lead
The poor adhesive force of pyrogenicity spray-on coating, gained filtering material easily makes hole be blocked because of coming off for coating；If solid particle
Particle diameter it is too small, then gained coating surface is smooth, and the specific surface area of gained filtering material is small.
The preparation of above-mentioned filtering material is comprised the following steps：(1) pore surface to porous material base material is carried out at surface
Reason；(2) will melt or the slurry thermal jet of semi-molten state will be coated onto the pore surface of porous material base material.By the group for controlling slurry
Into the time with spraying, the pore structure of final filtration material can be regulated and controled.If coating is smooth and thickness is too high, one may lead
Coating shedding is caused, two may block hole, therefore the aperture of final filtration material is difficult to reach nanoscale.When using fritting
When melting the slurry of dress, the solid particle in slurry is piled up in pore surface, makes the surface roughness of coating and specific surface area notable
Lifting；The solid particle piled up simultaneously forms secondary hole, and corresponding filtering material has air flux higher.Work as porous material
When base material matter is soft and thin, base material is preferably set to be sprayed again after unfolding fixation, so as to effectively improve spray efficiency.With traditional preparation
Technique is compared, process is simple and production efficiency is high.
Pore surface preferably to porous material base material before spraying is surface-treated, surface treatment include clean,
Adjustment substrate surface flatness and roughening treatment, difficult for drop-off its role is to make the adhesive force of coating stronger, service life
It is long.Wherein, the effect of cleaning is the impurity of the influence coating adhesive strength such as the grease on removal substrate pores surface；Adjustment base material
The flatness on surface is in order that coating is evenly distributed；Roughening treatment is that substrate pores table is lifted using Mechanical Method or chemical method
The surface roughness in face, so that increase the contact area of coating and pore surface, lifting adhesion therebetween.
Further, the average grain diameter of the solid particle in the slurry of the semi-molten state is 1-19 μm.If solid
The particle diameter of grain is excessive, then may cause the poor adhesive force of hot-spraying coating, and gained filtering material easily makes hole because of coming off for coating
Gap is blocked；If the particle diameter of solid particle is too small, then gained coating surface is smooth, the specific surface area of gained filtering material
It is small.Further, the solid particle is silicon and its oxide (such as Si, SiO2), aluminium and its oxide (such as Al, Al2O3、AlO2)、
Cu and its oxides (such as Cu, CuO), nickel and its oxide (such as Ni, NiO), iron and its oxi (such as Fe, Fe2O3、Fe3O4)、
Titanium and its oxide (such as Ti, TiO2) at least one；The physicochemical stability of this kind of solid particle is good, long service life, when
The solid particle is TiO2When, can be combined with light-catalyzed reaction, play the effect of sterilization.
Further, thermal spraying is carried out from the both sides of porous material base material respectively, is adhered to all holes for ensureing base material
There is uniform hot-spraying coating.
Further, the above method carries out pre-rolling before being additionally included in deposition to the porous material base material.By rolling in advance
System can further reduce the aperture of porous material base material, reduce the thickness of coating and the time of deposition.Further, it is described porous
Material substrate is superimposed rolling and forms by least two foam metals, and the base material of multilayer foam metal rolling has preferably by force
Degree.Preferably, the pressure of the rolling is 50-600T.
The formability of the porous material base material used by the utility model is good, intensity is high, therefore can correspondence
Filtering material be made variously-shaped filter element.Or according to the shape of existing filter element, in the porous material of correspondingly-shaped
Increase hot-spraying coating on material base material.The filtering material of different pore size can further constitute multistage filtering element.This crosses filtering element
Part is applied to gas purification, when being particularly applied to indoor air purification, because correspondingly porous material base material is compared, and tool
The average pore size for having the filtering material of hot-spraying coating is substantially reduced, therefore its filtering accuracy is higher, can meet room air
Depuration quality requirement.
Brief description of the drawings
Fig. 1 is the structural representation of filtering material.
Specific embodiment
Embodiment 1
The preparation method of filtering material is comprised the following steps：1) it is surface-treated：Using many of Ni-Cu solid solution alloys composition
Porous materials are base material (1), and its average pore size is 30 μm, and porosity is 52%；First, particle mean size is used for 15 μm of sand material pair
The pore surface (2) of base material (1) carries out mechanical coarsening treatment, and process time is 10min；Then, base material (1) be impregnated in into concentration
In sodium hydroxide solution that 50g/L, temperature are 80 DEG C and to keep 30min, then with washes of absolute alcohol three times, drying is standby
With；2) it is base material (1) laying is smooth, the Ni-Cu alloy slurry thermal jets of molten condition are then coated onto the pore surface of base material (1)
(2), natural cooling is pore surface (2) the uniform Ni-Cu alloy coats (3) of attachment in porous material base material (1).Gained mistake
The structural representation of filter material material is shown in Fig. 1, and its average pore size is 8 μm, and porosity is 41%, and filtering accuracy is obviously improved.When by with
When indoor air purification, more than 90%, using the filtering accuracy after June still more than 85%, and Ni-Cu is closed filter efficiency
Gold plating (3) does not have any obscission.
Embodiment 2
The preparation method of filtering material is comprised the following steps：1) it is surface-treated：Using many of Ni-Cr solid solution alloys composition
Porous materials are base material (1), and its average pore size is 20 μm, and porosity is 45%；First, particle mean size is used for 10 μm of sand material pair
The pore surface (2) of base material (1) carries out mechanical coarsening treatment, and process time is 10min；Then, base material (1) be impregnated in into concentration
In sodium radio-phosphate,P-32 solution that 60g/L, temperature are 80 DEG C and to keep 30min, then with washes of absolute alcohol three times, drying for standby；
2) it is base material (1) laying is smooth, then the slurry thermal jet of semi-molten state is coated onto the pore surface (2) of base material (1), wherein,
Liquid phase in slurry is Ni-Cr alloy, and solid phase is TiO2Particle (4), its particle mean size is 3 μm, and natural cooling is in porous material
The pore surface (2) of material base material (1) adheres to uniform coating (3), and the coating (3) is by Ni-Cr alloy and TiO2Particle (4) group
Into.The structural representation of gained filtering material is shown in Fig. 1, and its average pore size is 3 μm, and porosity is 32%, and filtering accuracy is significantly carried
Rise.When indoor air purification is used for, filter efficiency more than 90%, using the filtering accuracy after June still more than 85%,
And coating (3) does not have any obscission.
Embodiment 3
The preparation method of filtering material is comprised the following steps：1) it is surface-treated：It is base material (1) to use two layers of foam aluminium, its
Average pore size is 0.3mm, and porosity is 90%；First, 2min is rolled under the pressure of 400T after two layers of foam aluminium is superimposed, is rolled
Average pore size after system is 0.1mm, and porosity is 81%；Then, it is 50 μm of sand material to the hole of base material (1) to use particle mean size
Gap surface (2) carries out mechanical coarsening treatment, and process time is 10min；Finally, base material (1) be impregnated in into concentration for 80g/L, temperature
Spend in the sodium carbonate liquor for 80 DEG C and keep 30min, then with washes of absolute alcohol three times, drying for standby；2) by base material (1)
Laying is smooth, and then the slurry thermal jet of semi-molten state is coated onto the pore surface (2) of base material (1), wherein, the liquid phase in slurry
It is Fe-Al alloy, solid phase is TiO2Particle (4), its particle mean size is 5 μm, and natural cooling is in the hole of porous material base material (1)
Uniform coating (3) is adhered on gap surface (2), and the coating (3) is by Fe-Al alloy and TiO2Particle (4) is constituted.Gained filter material
The structural representation of material is shown in Fig. 1, and its average pore size is 20 μm, and porosity is 69%, and filtering accuracy is obviously improved.When being used for room
During inner air-cleaning, more than 90%, using the filtering accuracy after June still more than 85%, and coating (3) does not have filter efficiency
Any obscission.
Above-mentioned filtering material is cut, the filter element of plate, cylinder type or other shapes is folded into, can with but not only
It is limited to using following two modes.A kind of is that the filtering material of two different pore sizes is made into double-filtration element, average pore size
Larger first order filtering material is first contacted with thing to be filtered, retains larger particulate matter, and then less particulate matter is by the
Cascade filtration material is retained.Another is that two kinds of porous material base materials of different pore size are superimposed into rolling, then again using upper
Method attachment hot-spraying coating is stated, filter element is then made, the larger side of average pore size first contacts with thing to be filtered, retains
Firmly larger particulate matter, then less particulate matter retained by opposite side.
Claims (5)
1. filtering material, including porous material base material (1), it is characterised in that：In the pore surface (2) of porous material base material (1)
Hot-spraying coating (3) is attached with, solid particle (4) is distributed with the hot-spraying coating (3)；
The porous material base material (1) by solid solution alloy, the metal simple-substance of face-centred cubic structure or body-centered cubic structure gold
Category simple substance is made up of the metal polyporous material of matrix phase；Or the porous material base material (1) is foam metal；
The hot-spraying coating (3) includes any one in nickel-base alloy, ferrous alloy, cobalt-base alloys；
The solid particle (4) is silicon and its oxide, aluminium and its oxide, Cu and its oxides, nickel and its oxide, iron and
Any one in its oxide, titanium and its oxide.
2. filtering material as claimed in claim 1, it is characterised in that：The foam metal is nickel foam, foam nickel alloy, bubble
Any one in foam copper, foam copper alloy, foamed aluminium, foam aluminium alloy.
3. filtering material as claimed in claim 2, it is characterised in that：The average pore size of the foam metal is 0.01-
0.5mm, porosity is 60-95%.
4. filtering material as claimed in claim 1, it is characterised in that：The average pore size of the porous material base material (1) is 5-
100 μm, porosity is 25-70%.
5. filtering material as claimed in claim 1, it is characterised in that：The average grain diameter of the solid particle (4) is 1-19 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620384220.3U CN206214907U (en) | 2016-04-29 | 2016-04-29 | Filtering material and the filter element using the filtering material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620384220.3U CN206214907U (en) | 2016-04-29 | 2016-04-29 | Filtering material and the filter element using the filtering material |
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| Publication Number | Publication Date |
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| CN206214907U true CN206214907U (en) | 2017-06-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838427A (en) * | 2017-10-31 | 2018-03-27 | 成都易态科技有限公司 | Porous sintered metal laminated film and preparation method thereof |
| CN111153440A (en) * | 2019-12-31 | 2020-05-15 | 陕西斯瑞新材料股份有限公司 | Fe for improving thermal emissivity3O4Preparation method and application of coating |
-
2016
- 2016-04-29 CN CN201620384220.3U patent/CN206214907U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838427A (en) * | 2017-10-31 | 2018-03-27 | 成都易态科技有限公司 | Porous sintered metal laminated film and preparation method thereof |
| CN111153440A (en) * | 2019-12-31 | 2020-05-15 | 陕西斯瑞新材料股份有限公司 | Fe for improving thermal emissivity3O4Preparation method and application of coating |
| CN111153440B (en) * | 2019-12-31 | 2022-04-22 | 陕西斯瑞新材料股份有限公司 | Fe for improving thermal emissivity3O4Preparation method and application of coating |
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