CN107051016A - Composite modified gas-liquid coalescing filter - Google Patents
Composite modified gas-liquid coalescing filter Download PDFInfo
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- CN107051016A CN107051016A CN201710136861.6A CN201710136861A CN107051016A CN 107051016 A CN107051016 A CN 107051016A CN 201710136861 A CN201710136861 A CN 201710136861A CN 107051016 A CN107051016 A CN 107051016A
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
- B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
- B01D46/0008—Two or more filter elements not fluidly connected positioned in the same housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/266—Drying gases or vapours by filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
- B01D2267/30—Same type of filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2275/10—Multiple layers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Filtering Materials (AREA)
Abstract
The invention provides a kind of composite modified gas-liquid coalescing filter, including：Tubular skeleton；First filter layer, including the first nanofiber modified layer and the first micrometer fibers modified layer, the head end of first nanofiber modified layer is around being located at outside tubular skeleton, the terminal edge of the leading edge of first micrometer fibers modified layer and the first nanofiber modified layer is seamless to continue, and the first micrometer fibers modified layer is around being located at outside the first nanofiber modified layer；Second filter layer, including the second nanofiber modified layer and the second micrometer fibers modified layer, second nanofiber modified layer leading edge with the first micrometer fibers modified layer terminal edge is seamless continues, and second nanofiber modified layer around being located on the outside of the first micrometer fibers modified layer, the terminal edge of the leading edge of second micrometer fibers modified layer and the second nanofiber modified layer is seamless to continue, and the second micrometer fibers modified layer is around the outside for being located at the second nanofiber modified layer.The present invention can prevent reentrainment phenomenon.
Description
Technical field
The present invention relates to gas-liquid filteration device field, specifically a kind of composite modified gas-liquid coalescing filter.
Background technology
Different size of droplet particles would generally be entrained with the fields such as natural gas, coal bed gas and compressed air, gas,
So as to influence the operation safety of makings cleanliness factor and related equipment.It is general to use gravity separator, inertia separator, whirlwind
The filtering separation device such as separator or gas-liquid coalescing filter carries out gas-liquid separation.At present, for micron order and sub-micron etc. compared with
The drop of small particle, uses gas-liquid coalescing filter mostly.Gas-liquid coalescing filter is by inner framework and outer layer fiber filter material
Material composition.The organic fibrous material such as the inorfils such as metallic fiber, glass fibre and polyester fiber, polypropylene fibre is conventional
Gas-liquid coalescence filtration material, most of is oil-wet behavior, generally requires and is handled using surface modifying method.Conventional table
Surface modification process has solution dipping method and plasma method.Solution dipping method exist solvent largely waste, complex treatment process,
The defect such as treatment effect is uneven.Plasma method is plasmarized by being carried out to corresponding process gas, generation etc.
Gas ions chemically react with body surface, so as to reach surface clean, activation or modifying function.Be generally divided into normal pressure etc. from
Daughter and low-pressure plasma technology, the latter in process chambers due to that can form a vacuum environment so that plasma
The inside arbitrary surfaces of filtering material can be entered, so as to reach highly uniform and comprehensive surface treatment.For lipophilic
Filtering material, in filter process, outlet face causes liquid-sheet disintegration and causes micro- in the presence of easily forming one layer of liquid film, air-flow
The reentrainment phenomenon of meter level drop, and the generation of reentrainment phenomenon can be reduced when from oleophobic type filtering material, from
And it is favorably improved filter efficiency.
As instrument and equipment is changed to high accuracy development and air quality control from PM10 to PM2.5, traditional gas-liquid is gathered
Tie filter relatively low for the filter efficiency of submicron droplets (especially drop in the range of easy penetrating grain size), do not reach corresponding
Technology or environmental requirement.Nanofiber is due to that with less fibre diameter and aperture, effectively can trap in the range of this
Drop, but the oil-wet behavior itself having causes easily to produce liquid film and larger pressure drop occur during use, and its is strong
The weaker feature of degree causes more difficult to directly apply to gas-liquid coalescence filtration field.
The A of Publication No. CN 104307288 Chinese invention patent, the patent of invention discloses a kind of high-efficiency cyclone coalescence
Gas-liquid separator, separator mainly includes container casing and the eddy flow that sets from bottom to top centrifuge section, rectification liquid collecting plate,
Nanofiber coarse separation section, spiral separation section constant gradient part；Mixed gas import, purification are provided with container casing
Gas vent and liquid-phase outlet part.The invention is by three kinds of separation methods such as gravitational settling, centrifugation and coarse separation and table
Face modification technology effectively combines, with very high separative efficiency and disposal ability, can effectively prevent reentrainment phenomenon.Should
The shortcoming of patent of invention：The invention reduces drop reentrainment using eddy flow method, complicated integral structure and floor space is excessive,
It is unfavorable for installing and operates.
The A of Publication No. CN 105392544 Chinese invention patent, the patent of invention discloses a kind of gradient nano fiber
Filter medium, is formed by multilayered medium material, and multilayered medium material includes nanofiber media layer, wherein, above-mentioned multilayer is mutual
Lamination, with reference to or it is otherwise mutually compound.Above-mentioned composite filter media can include at least one nanofiber modified layer,
At least one above-mentioned nanofiber modified layer includes the polymeric media material that geometric average fibre diameter is about 100nm to 1 μm
Material and multiple fibers, above-mentioned multiple fibers are configured to each fibre at such gradient, the upstream face of above-mentioned nanofiber modified layer
The ratio of the geometric mean diameter of dimension and the geometric mean diameter of each fiber of the downstream face of above-mentioned nanofiber modified layer is
About 1.1 to 2.8, preferably about 1.2 to 2.4.The shortcoming of the patent of invention：The composite filter media is received different-diameter
Rice fibre modification layer direct combination, is mainly used in liquid and filters admittedly or liquid liquid coalescence filtration, but nanofiber modified layer thickness is (at least
For 40 μm) it is excessive, without apocenosis passage inside filter medium, liquid easily media interior remain so that cause pressure drop it is too high and
Reentrainment phenomenon, it is impossible to suitable for gas-liquid coalescence filtration field.
The content of the invention
The invention provides a kind of composite modified gas-liquid coalescing filter, to reach the purpose for reducing drop reentrainment.
The technical solution adopted for the present invention to solve the technical problems is：A kind of composite modified gas-liquid coalescing filter, it is multiple
Closing modified gas-liquid coalescing filter includes：Tubular skeleton；First filter layer, including the first nanofiber modified layer and first micron
Fibre modification layer, the first nanofiber modified layer and the first micrometer fibers modified layer at least winding tubular skeleton one week respectively, the
The head end of one nanofiber modified layer is around being located at outside tubular skeleton, the leading edge of the first micrometer fibers modified layer and first nanometer
The terminal edge of fibre modification layer is seamless to continue, and the first micrometer fibers modified layer is around being located at outside the first nanofiber modified layer
Side；Second filter layer, including the second nanofiber modified layer and the second micrometer fibers modified layer, the second nanofiber modified layer and
Second micrometer fibers modified layer at least winding tubular skeleton one week, the leading edge and first of the second nanofiber modified layer respectively
The terminal edge of micrometer fibers modified layer is seamless to be continued, and the second nanofiber modified layer is modified around the first micrometer fibers are located at
Layer outside, the terminal edge of the leading edge of the second micrometer fibers modified layer and the second nanofiber modified layer is seamless to continue, and
And second micrometer fibers modified layer around the outside for being located at the second nanofiber modified layer.
Further, composite modified gas-liquid coalescing filter also includes the 3rd filter layer, and the 3rd filter layer is received including the 3rd
Rice fibre modification layer and the 3rd micrometer fibers modified layer, leading edge and the second micrometer fibers of the 3rd nanofiber modified layer change
Property layer terminal edge it is seamless continue, and the 3rd micrometer fibers modified layer is around being located on the outside of the second micrometer fibers modified layer, the
The leading edge of three micrometer fibers modified layers with the terminal edge of the 3rd nanofiber modified layer is seamless continues, the 3rd micrometer fibers
Modified layer is around the outside for being located at the 3rd nanofiber modified layer.
Further, along the radial direction direction from inside to outside of tubular skeleton, the first nanofiber modified layer, the second Nanowire
The aperture of dimension modified layer and the 3rd nanofiber modified layer gradually increases；First micrometer fibers modified layer, the second micrometer fibers change
Property layer and the aperture of the 3rd micrometer fibers modified layer gradually increase.
Further, the aperture ratio of the aperture of the first nanofiber modified layer and the second nanofiber modified layer is 0.3
Aperture ratio to the aperture of 0.9, first micrometer fibers modified layer and the second micrometer fibers modified layer is 0.4 to 0.9.
Further, the aperture ratio of the aperture of the second nanofiber modified layer and the 3rd nanofiber modified layer is 0.3
Aperture ratio to the aperture of 0.9, second micrometer fibers modified layer and the 3rd micrometer fibers modified layer is 0.4 to 0.9.
Further, the first nanofiber modified layer, the second nanofiber modified layer and the 3rd nanofiber modified layer
Thickness is 5 microns to 25 microns；First micrometer fibers modified layer, the second micrometer fibers modified layer and the 3rd micrometer fibers are modified
The thickness of layer is 0.1mm to 3mm.
Further, the first glue-line and the first nanofiber modified layer are passed through on the inside of the head end of the first micrometer fibers modified layer
Outside laminating, pass through the second glue-line and the end of the first nanofiber modified layer on the inside of the end of the first micrometer fibers modified layer
Outside is fitted, and is pasted on the inside of the head end of the second nanofiber modified layer by the outside of the 3rd glue-line and the first micrometer fibers modified layer
Close.
Further, the first glue-line, the second glue-line and the 3rd glue-line are constituted by multiple glue spraying points, the first glue-line it is multiple
Axile displacement of the multiple glue spraying points of glue spraying point and the 3rd glue-line along tubular skeleton is set.
Further, composite modified gas-liquid coalescing filter also includes drain layers, the leading edge of drain layers and second micro-
The terminal edge of rice fibre modification layer is seamless to continue.
Further, the aperture of drain layers is more than or equal to 70 μm, and the thickness of drain layers is 0.1mm-3mm.
Further, the short transverse of the first filter layer and the short transverse of the second filter layer are along the axial direction of cylindrical skeleton
Set, the height of the height of the first filter layer and the second filter layer 30 is identical with the axial height of cylindrical skeleton.
The beneficial effects of the invention are as follows the embodiment of the present invention can be realized while ensureing compared with low pressure drop, to sub-micron
Drop (especially drop in the range of easy penetrating grain size) and micron order drop all have higher filter efficiency, can effectively subtract
Droplet reentrainment phenomenon.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the front view structure sectional view of composite modified gas-liquid coalescing filter embodiment of the invention；
Fig. 2 is the plan structure sectional view of composite modified gas-liquid coalescing filter embodiment of the invention；
Fig. 3 is dislocation glue spraying schematic diagram in composite modified gas-liquid coalescing filter embodiment of the invention；
Fig. 4 is the experimental data figure of composite modified gas-liquid coalescing filter embodiment fluid accumulation amount of the invention and pressure drop；
Fig. 5 is composite modified gas-liquid coalescing filter embodiment particle diameter of the invention and the experimental data figure of filter efficiency.
Reference in figure：10th, tubular skeleton；20th, the first filter layer；21st, the first nanofiber modified layer；22nd, first
Micrometer fibers modified layer；30th, the second filter layer；31st, the second nanofiber modified layer；32nd, the second micrometer fibers modified layer；40、
3rd filter layer；41st, the 3rd nanofiber modified layer；42nd, the 3rd micrometer fibers modified layer；50th, drain layers；61st, the first glue spraying
Point；62nd, the 3rd glue spraying point.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As depicted in figs. 1 and 2, it is composite modified the embodiments of the invention provide a kind of composite modified gas-liquid coalescing filter
Gas-liquid coalescing filter includes tubular skeleton 10, the first filter layer 20 and the second filter layer 30.First filter layer 20 includes first
The micrometer fibers modified layer 22 of nanofiber modified layer 21 and first, the first nanofiber modified layer 21 and the first micrometer fibers are modified
At least winding tubular skeleton 10 1 weeks of layer 22, the head end of the first nanofiber modified layer 21 is around being located at outside tubular skeleton 10, and first
The terminal edge of the leading edge of micrometer fibers modified layer 22 and the first nanofiber modified layer 21 is seamless to continue, first micron of fibre
Dimension modified layer 22 is around being located at the outside of the first nanofiber modified layer 21.Second filter layer 30 includes the second nanofiber modified layer 31
With the second micrometer fibers modified layer 32, the second nanofiber modified layer 31 and the second micrometer fibers modified layer 32 at least winding tubular
Skeleton 10 1 weeks.The leading edge of second nanofiber modified layer 31 and the terminal edge of the first micrometer fibers modified layer 22 are seamless
Continue, the first nanofiber modified layer 32 is around being located at the outside of the first micrometer fibers modified layer 22, the second micrometer fibers modified layer 32
Leading edge and the second nanofiber modified layer 31 terminal edge it is seamless continue, the second micrometer fibers modified layer 32 is around being located at
The outside of second nanofiber modified layer 31.Wherein, tubular skeleton 10 can be the nonmetallic materials such as metal or polypropylene, for outer
The support of layer filtering material, air-flow radially inside flows out outward from tubular skeleton 10.Cylindrical skeleton 10 uses hollow out wire netting
Or the hollow out material such as polypropylene is surrounded, form what is flowed for gas by above-mentioned hollow out on the side wall of the cylindrical skeleton 10
Opening, gas enters from the upper end of the cylindrical skeleton 10 or lower end.
Wherein, by taking the first nanofiber modified layer 21 and the first micrometer fibers modified layer 22 as an example, above-mentioned seamless continue is
The terminal edge and the leading edge slitless connection of the first micrometer fibers modified layer 22 for referring to the first nanofiber modified layer 21 (are not taken
Connect), and can be using pasting, suture or other processing modes are attached.Certainly, by above-mentioned first nanofiber modified layer
21 terminal edge and the leading edge slitless connection of the first micrometer fibers modified layer 22 fall within this hair without fixing process
Within bright protection domain.
The embodiment of the present invention can be realized while ensureing compared with low pressure drop, to submicron droplets (especially easy penetrating
Drop in particle size range) and micron order drop all have higher filter efficiency, drop reentrainment phenomenon can be effectively reduced.
The embodiment of the present invention is particularly suitable for use in and submicron droplets (especially drop in the range of easy penetrating grain size) is filtered
It is required that higher operating mode, by alternately composite construction, comprehensively utilizes the filter efficiency height and micrometer fibers of nanofiber modified layer
The big advantage of the drainage capacity of modified layer, realizes the multistage coupling of droplet coalescence growth and discharge, and the micron in composite construction
Fibre modification layer acts also as the effect of prefilter.
It should be noted that nanofiber prepares (certain nanofiber system of the present invention by electrostatic spinning technique
Preparation Method is not limited to electrostatic spinning technique, can be prepared by pulling method, melt blown technology or other correlation techniques), spin
The solute that silk solution is selected includes organic materials such as polyacrylonitrile, polyimides, nylon, polystyrene, polyurethane, Kynoar
Material, inorganic material or organic/inorganic composite material.Each nanofiber modified layer is handled using low pressure plasma, is made
Fiber surface has hydrophobic oleophobic characteristic, the drop that effectively prevents from being captured be internally formed fine and close liquid film in nanofiber modified layer and
Cause pressure drop excessive.
Microfiber material can select the nonmetal-fiber-materials such as glass fibre, polyester fiber, polypropylene fibre and stainless
The metallic fiber materials such as steel.It is super close that each micrometer fibers modified layer can have fiber surface using low pressure plasma processing
The super oil-wet behavior of water, so as to realize (side close to tubular skeleton 10 is by the adjacent upstream of each micron order fibre modification layer
Upstream) nanofiber modified layer discharge drop quickly absorb and discharged downwards along fiber surface, reach timely discharge opeing and protect
Demonstrate,prove relatively low filtering pressure drop.
It should be noted that the processing of above-mentioned low pressure plasma refers to from suitable process gas as occurring source, by
Processing gas entrance enters, and radio-frequency power supply provides energy to sparking electrode, the process gas entered by gas access is carried out etc.
Gas ions, processed filtering material is positioned over above filter material pallet, and plasma and the filtering material surface of generation occur
Chemical action, so that filtering material obtains required super hydrophilic super oleophylic or hydrophobic oleophobic characteristic.By vacuum in processing procedure
Pump is evacuated, it is ensured that inside cavity is low-pressure state, and absolute pressure is less than 10Pa, so as to ensure each hole of filtering material
Inside can be handled uniformly.Described hydrophobic oleophobic modified technique gas can be for the gas containing low-surface-energy element or by corresponding
The gas that liquid evaporation is obtained, described super hydrophilic super oleophylic modified technique gas can for the gas containing hydrophilic functional group or
Obtained gas is evaporated by respective liquid.Described Nanofiber filter layer surface modification time preferred value is 2-8min,
Described micrometer fibers filter layer surface modification treatment time preferred value is 5-15min.
Wherein, above-mentioned hydrophobic oleophobic characteristic is is tested according to international standard, and fuel shedding quality is at least up to 2 grades of (ISO
14419-2010, textile oleophobic testing standard), hydrophobic property reaches 100 points (AATCC 22-2010, hydrophobic testing standard).
Super hydrophilic super oil-wet behavior refers to, for the different oils in distilled water and international standard ISO 14419-2010, when selecting 5
μ L liquid is dripped when material surface, and the initial contact angle measured by contact angle instrument is close to 0 ° and liquid in quickly disappearing in 1 second
Lose.
Preferably, composite modified gas-liquid coalescing filter also includes the 3rd filter layer 40, and the 3rd filter layer 40 includes the 3rd
The micrometer fibers modified layer 42 of nanofiber modified layer 41 and the 3rd, the leading edge of the 3rd nanofiber modified layer 41 and second micro-
The terminal edge of rice fibre modification layer 32 is seamless to continue, and the 3rd nanofiber modified layer 41 is around being located at the second micrometer fibers modified layer
32 outsides, the leading edge of the 3rd micrometer fibers modified layer 42 and the terminal edge of the 3rd nanofiber modified layer 41 are without sewing up
Continuous, the 3rd micrometer fibers modified layer 42 is around the outside for being located at the 3rd nanofiber modified layer 41.3rd filter layer 40 is also used
Low pressure plasma processing.In the embodiment of the present invention, above-mentioned first filter layer 20, the second filter layer 30 and the 3rd filter layer 40
Height vertical direction along along Fig. 1 is set, and the height of above-mentioned first filter layer 20, the second filter layer 30 and the 3rd filter layer 40 is equal
It is identical with the axial height of cylindrical skeleton 10.Wherein, above-mentioned first filter layer 20, the second filter layer 30 and the 3rd filter layer 40
Length is the circumferential length of the tubular skeleton 10 along along Fig. 1, above-mentioned first filter layer 20, the second filter layer 30 and the 3rd filter layer
40 width is the height of above-described vertical direction.
It should be noted that in the embodiment of the present invention, above-mentioned filter layer (the first filter layer 20, the second filter layer 30 and
Three filter layers 40) can be multilayer, such as two layers to six layers, six layers can be higher than under special operating mode.Above-mentioned multiple layers of filters
Arrangement mode can use arrangement mode same with the above-mentioned embodiment.And the processing mode of above-mentioned multiple layers of filters is equal
It is identical with the processing mode of the first filter layer 20, the second filter layer 30 and the 3rd filter layer 40, for example with low pressure plasma
Processing.
In the embodiment of the present invention, the upper end of cylindrical skeleton 10 is provided with annular fixed part, and the lower end of cylindrical skeleton 10 is set
It is equipped with lower annular fixed part.Above-mentioned annular fixed part and lower annular fixed part are each attached on cylindrical skeleton 10, above-mentioned multiple
The upper end of filter layer vertical direction in Fig. 1 is bonded with annular fixed part on cylindrical skeleton 10, and above-mentioned multiple filter layers are in Fig. 1
The lower end of middle vertical direction is bonded with 10 times annular fixed parts of cylindrical skeleton.
Further, along the radial direction direction from inside to outside of tubular skeleton 10, the nanofiber modified layer in each filter layer
Pore size gradually increase, the pore size of the micrometer fibers modified layer in each filter layer also gradually increases.With three layer filtration
Exemplified by layer, along the radial direction direction from inside to outside of tubular skeleton 10, the first nanofiber modified layer 21, the second nanofiber are modified
The aperture of the nanofiber modified layer 41 of layer 31 and the 3rd gradually increases；First micrometer fibers modified layer 22, the second micrometer fibers change
Property the aperture of micrometer fibers modified layer 42 of layer 32 and the 3rd gradually increase.
Each nanofiber modified layer forms aperture between different layers from inside to outside and is incremented by structure, realizes fiber aperture and drop
Size growth is mutually matched, and is grown up mechanism according to droplet coalescence, sets the aperture of each nanofiber modified layer gradually to increase, it is ensured that
Avoid using the excessive phenomenon of pressure drop caused by the minimum nanofiber modified layer in aperture completely while compared with filtration efficiency.It is each micro-
Form aperture between different layers is incremented by structure to meter level fibre modification layer from inside to outside, realizes apocenosis passage with discharging droplet size phase
Mutually matching, it is ensured that effective discharge opeing, and reduce pressure drop and operating cost.
Specifically, the aperture of the first nanofiber modified layer 21 and the aperture ratio of the second nanofiber modified layer 31 are
0.3 to 0.9, wherein, the aperture of the first nanofiber modified layer 21 and the aperture preferred ratio of the second nanofiber modified layer 31
For 0.4 to 0.8.The aperture ratio of the aperture of first micrometer fibers modified layer 22 and the second micrometer fibers modified layer 32 for 0.4 to
0.9, wherein, the aperture preferred ratio of the aperture of the first micrometer fibers modified layer 22 and the second micrometer fibers modified layer 32 is 0.5
To 0.8.The aperture of second nanofiber modified layer 31 and the aperture ratio of the 3rd nanofiber modified layer 41 are 0.3 to 0.9, its
In, the aperture of the second nanofiber modified layer 31 and the aperture preferred ratio of the 3rd nanofiber modified layer 41 are 0.4 to 0.8.
The aperture of second micrometer fibers modified layer 32 and the aperture ratio of the 3rd micrometer fibers modified layer 42 are 0.4 to 0.9, wherein, the
The aperture of two micrometer fibers modified layers 32 and the aperture preferred ratio of the 3rd micrometer fibers modified layer 42 are 0.5 to 0.8.
In the embodiment of the present invention, the fiber diameter range of above-mentioned first nanofiber modified layer 21 is 10-400nm, thickness
Scope is 5-25 μm.The fiber diameter range of second nanofiber modified layer 31 is 100-600nm, and thickness range is 5-25 μm.
The fiber diameter range of 3rd nanofiber modified layer 41 is 200-1000nm, and thickness range is 5-25 μm.When nanofiber changes
Property layer number of plies when being more than three layers, the 4th layer and below the preferred fiber diameter range of each layer be in the range of 400-1000nm, it is thick
It is 5-25 μm to spend scope, and ensures that later layer fibre diameter is not less than preceding layer fibre diameter.
The fiber diameter range of first micrometer fibers modified layer 22 is 1-10 μm, and thickness range is 0.1-3mm.Second micron
Fibre modification 32 fiber diameter range of layer are 5-20 μm, and thickness range is 0.1-3mm.The fiber of 3rd micrometer fibers modified layer 42
Diameter range is 10-30 μm, and thickness range is 0.1-3mm.When the number of plies of above-mentioned micrometer fibers modified layer is more than three layers, the 4th
Layer and the below preferred fiber diameter range of each layer are that thickness range is 0.1-3mm in 10-30 μ ms, and ensure later layer
Fibre diameter is not less than preceding layer fibre diameter.
The embodiment of the present invention is referred to along the outer surface of tubular skeleton 10 using 4/3 circle canoe, the 4/3 circle canoe
Nanofiber is enclosed in winding 4/3, is continued winding micrometer fibers one at 1/3 unnecessary circle nanofiber trip edge and is enclosed.It is micro- at this
Continue to wind 4/3 circle nanofiber modified layer again at rice fiber edge, so alternately, structure shown in Fig. 2 is formed, so that real
The edge join of existing adjacent nano fibre modification layer sentences three layers and forms a circulation, staggers respectively by 120 ° of positions.Preferably,
According to different operating mode needs, it can be wound using 6/5 circle to 3/2 circle canoe.
In the embodiment of the present invention, between each filter layer and the nanofiber modified layer and micrometer fibers of same filter layer changes
Property layer between pass through paste fix.By taking the first filter layer and the second filter layer as an example.First nanofiber of the first filter layer
Modified layer 21 is around being located at outside cylindrical skeleton 10, and the end inner surface of the first nanofiber modified layer 21 is pasted onto positioned at inner side
The first nanofiber modified layer 21 outside on.The head end end of first micrometer fibers modified layer 22 changes with the first nanofiber
Property layer 21 extreme ends abut, first nanometer positioned at inner side is pasted onto on the inside of the head end of the first micrometer fibers modified layer 22
On fibre modification layer 21.The head end of the first nanofiber modified layer 21 is pasted onto on the inside of the end of first micrometer fibers modified layer 22
Outside.
Using dislocation glue spraying mode in the embodiment of the present invention, the dislocation glue spraying mode is that compressed air atomization adhesive enters
Row glue spraying, the apparent pressure limit of compressed air that different adhesives are set is 0.1-0.8bar.The apparent pressure is optimal value,
Can suitably it relax.The adhesive includes the glue of the soluble glue and other commonly used available for atomization.The glue spraying position is each
(except the first nanofiber modified layer 21, the first nanofiber modified layer 21 is in end for the tip inside position of filtering material
Side is provided with the inside of glue spraying position, head end and is not provided with), glue spraying width optimum value is 6-15mm.The dislocation refers to work as same material
Expect inside and outside both sides all whens containing glue spraying, the head end of the first micrometer fibers modified layer 22 as escribed above, both sides glue spraying point position
Mutually stagger along the axial direction of tubular skeleton 10, as shown in Figure 3.So as to contribute to increase gas or liquid flow path, reduction
Resistance and operating cost.Meanwhile, it is capable to be favorably improved drop intercepting efficiency.Along the axial phase of tubular skeleton 10 in implementation process
Adjacent glue spraying point is 1-5mm apart from optimal value.Under felicity condition, glue spraying can be carried out between any fibre modification layer, prevent fiber
Depart from or the caused aging phenomenon of fracture, so as to further improve filter bulk strength.Shown by air permeability experimental result,
The pressure difference of the dislocation more common filtering material of glue spraying filtering material, which increases, is no more than 22%, and according to filtering material Tensile Test Results
It has been shown that, the cross direction tear strength of the dislocation more common filtering material of glue spraying filtering material increases 55.8%, with preferable intensity
Lifting.
Specifically, as shown in Figures 2 and 3, the end inner surface of the first nanofiber modified layer 21 is viscous by the 4th glue-line
It is attached on the outside of the first nanofiber modified layer 21 of inner ring.The head end end of first micrometer fibers modified layer 22 and the
The extreme ends of one nanofiber modified layer 21 are abutted, on the inside of the head end of the first micrometer fibers modified layer 22 by the first glue-line with
Pass through the second glue-line and the on the inside of the outside laminating of first nanofiber modified layer 21, the end of the first micrometer fibers modified layer 22
Fitted on the outside of the end of one nanofiber modified layer 21, on the inside of the head end of the second nanofiber modified layer 31 by the 3rd glue-line with
Fitted on the outside of the end of first micrometer fibers modified layer 22.It is viscous by the 5th glue-line on the inside of the head end of second micrometer fibers modified layer 32
It is attached in the second nanofiber modified layer 31.First glue-line is made up of multiple first glue spraying points 61, by multiple on the second glue-line
2 glue spraying points are constituted, and are made up of, are made up of on the 4th glue-line multiple 4th glue spraying points multiple 3rd glue spraying points 62 on the 3rd glue-line,
It is made up of on 5th glue-line multiple 5th glue spraying points, above-mentioned multiple first glue spraying points 61 and multiple 3rd glue spraying points 62 are along tubular bone
The axile displacement of frame 10 is set.Axile displacement of the above-mentioned multiple second glue spraying points with multiple 4th glue spraying points along tubular skeleton 10 is set
Put.
In the embodiment of the present invention, the above-mentioned position for needing dislocation glue spraying can have multiple, such as edge in Fig. 3 in the present invention
The position of a dislocation glue spraying can occur in every 120 ° of circumferencial direction.In the embodiment of the present invention, the head end of each fibre modification layer
The fibre modification layer outside stickup positioned at inner ring with tail end with closing on.The both sides of every same spacing modified layer same position
All point containing glue spraying when, both sides glue spraying point position all should mutually stagger, and no longer be repeated one by one herein.
Composite modified gas-liquid coalescing filter also includes drain layers 50, and the head end of drain layers 50 and the second micrometer fibers are modified
The end of layer 32 is seamlessly connected, and the end of drain layers 50 is fitted with the second micrometer fibers modified layer 32 of inner side.The present invention is implemented
In example, when inner side filter layer is multilayer, the two ends correspondence of drain layers 50 is connected with outermost filter layer.Drain layers 50 are selected
Non-woven cloth or woven cloths, thickness is in the range of 0.1-3mm, and average pore size plays outer layer protection and discharge opeing more than 70 μm
Effect, the generation of drop reentrainment phenomenon, edge can be prevented effectively from by the synergy with micrometer fibers modified layer
It is preferably simultaneously from two kinds of combinations, it is ensured that outermost layer bond strength using two kinds of combinations of dislocation glue spraying or knitting.
, can be in metal frameworks such as outermost addition stainless steels under specified conditions.The dislocation glue spraying mode and above-mentioned dislocation glue spraying mode
It is identical.The knitting type is that drain layers 50 are sutured along edge.
From the composite modified gas-liquid coalescing filter in the embodiment of the present invention and traditional gas-liquid coalescing filter progress pair
Than experiment, the more traditional gas-liquid coalescing filter of strainability in the embodiment of the present invention, which has, to be obviously improved.
Specific experiment parameter is as follows：The average pore size ratio of composite modified each nanofiber modified layer of gas-liquid coalescing filter
For 0.5, the average pore size ratio of each micrometer fibers modified layer is 0.6, each micrometer fibers modified layer and relevant nanometer fibre modification
The average pore size ratio of layer (such as the first micrometer fibers modified layer and the first nanofiber modified layer) is 13.Filter inlet is apparent
Air velocity is 0.1m/s, and it is molten to occur gas using fluid specified in international test standards EN779 (di-n-octyl sebacate, DEHS)
Droplet size range is 0.04-20 μm in glue, entrance aerosol, and concentration is 500-550mg/m3。
In Fig. 4, abscissa is unit area fluid accumulation amount, and ordinate is process pressure drop, and curve 1 is represented in wherein Fig. 4
The embodiment of the present invention, curve 2 represents prior art.In Fig. 5, abscissa is particle diameter, and ordinate is filter efficiency.In wherein Fig. 5
Curve 1 represents the embodiment of the present invention, and curve 2 represents prior art.Experimental result is as follows：With unit area accumulation of fluid amount
Increase, filter pressure drop increase process of the invention is more slow, and filter bottom has more liquid to discharge in filter process,
The liquid being captured will not block gas channel, be conducive to improving service life；Meanwhile, filter steady-state voltage drop phase of the invention
To relatively low, about 600Pa is reduced.The filter stable state filter efficiency of the present invention is substantially better than conventional filter, penetrance (1 decreasing effect
Rate value, i.e. penetrance+efficiency value=1, wherein efficiency value are known in the art general knowledge) peak falls below by 4.85%
1.76%, and be respectively provided with and obviously improve for the filter efficiency of drop in the range of easy penetrating grain size, at the same to 4 μm with
Upper drop can effectively reduce drop reentrainment phenomenon.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
In profile design aspect, relative to traditional gas-liquid coalescing filter or modular combination filtering coalescence filtration equipment,
Compact conformation of the present invention, it is easy to install.
In configuration aspects, the new structure being alternately combined by using nanofiber modified layer and micrometer fibers modified layer is set
Meter, relative to multi-layer nano fiber direct combination, instant invention overcomes due to nanofiber modified layer it is thicker caused by it is internal
The problem of hydrops and not enough apocenosis passage, so as to have relatively low pressure drop while ensureing high efficiency filter.On this basis, respectively receive
Rice fibre modification layer sets aperture to be incremented by structure, optimizes average pore size relative value, is conducive to drop poly- inside filtering material
Knot is grown up forms matching relationship with nanofiber modified layer aperture, reduces filtering pressure drop and operating cost；Also, it is fine to each micron
Tieing up modified layer sets aperture to be incremented by structure, is conducive to the discharge opeing drop inside filtering material to be formed with micrometer fibers modified layer aperture
Matching relationship, promotes drop smoothly to discharge, and further reduces filtering pressure drop and operating cost.
By the synergy of internal each micrometer fibers modified layer and outermost drain layers, it ensure that filter not
With under the operating mode of inlet gas liquid content can smoothly discharge opeing, and reduce the generation of drop reentrainment phenomenon.
In terms of processing, by setting 4/3 to enclose canoe nanofiber modified layer, leak source appearance is helped avoid,
Ensure the filter effect integrality at each position of filter.By being answered using dislocation glue spraying mode different layers edge junction
Close, effective filtration area can not be influenceed while proof strength, and filtration resistance increase is not obvious caused by glue；Meanwhile,
Dislocation glue spraying can form bending channel, be conducive to trapping drop with effect of inertia by intercepting, improve filter efficiency.
In terms of material modification processing, by low pressure plasma process for modifying surface, to nanofiber modified layer and micro-
Rice fibre modification layer carries out hydrophobic oleophobic and the processing of super hydrophilic super oleophylic respectively, both environmental protection, without processing waste of solvent, can guarantee that again
Each Fiber strength is uniform inside filtering material, and effect has permanently, relative to the reduction of solution processing cost
More than 50%.
The embodiment of the present invention can effectively reduce production run cost more than 30% relative to traditional gas-liquid coalescing filter.
At the same conditions, compared with the conventional filter service life of average 3 months, the present invention can effectively increase the service life 2
More than individual month.
It is described above, it is only the specific embodiment of the present invention, it is impossible to which the scope implemented is invented with its restriction, so it is equivalent
The displacement of component, or the equivalent variations made according to scope of patent protection of the present invention and modification, should all still fall within what this patent was covered
Category.In addition, between technical characteristic and technical characteristic in the present invention, between technical characteristic and technical scheme, technical scheme with
It can be used between technical scheme with independent assortment.
Claims (11)
1. a kind of composite modified gas-liquid coalescing filter, it is characterised in that the composite modified gas-liquid coalescing filter includes：
Tubular skeleton (10)；
First filter layer (20), including the first nanofiber modified layer (21) and the first micrometer fibers modified layer (22), first receives
Rice fibre modification layer (21) and the first micrometer fibers modified layer (22) at least distinguish winding tubular skeleton (10) one weeks, first nanometer
The head end of fibre modification layer (21) is arranged in tubular skeleton (10) outside wall surface, the head end side of the first micrometer fibers modified layer (22)
The terminal edge of edge and the first nanofiber modified layer (21) is seamless to continue, and the first micrometer fibers modified layer (22) is around being located at
On the outside of first nanofiber modified layer (21)；
Second filter layer (30), including the second nanofiber modified layer (31) and the second micrometer fibers modified layer (32), second receives
Rice fibre modification layer (31) and the second micrometer fibers modified layer (32) at least distinguish winding tubular skeleton (10) one weeks, second nanometer
The terminal edge of leading edge and the first micrometer fibers modified layer (22) of fibre modification layer (31) is seamless to continue, and second receives
Rice fibre modification layer (31) is around being located on the outside of the first micrometer fibers modified layer (22), the head end of the second micrometer fibers modified layer (32)
The terminal edge of edge and the second nanofiber modified layer (31) is seamless to continue, and second micrometer fibers modified layer (32) winding
In the outside of the second nanofiber modified layer (31).
2. composite modified gas-liquid coalescing filter according to claim 1, it is characterised in that the composite modified gas-liquid is gathered
Tying filter also includes the 3rd filter layer (40), and the 3rd filter layer (40) includes the 3rd nanofiber modified layer (41) and the
Three micrometer fibers modified layers (42), the leading edge of the 3rd nanofiber modified layer (41) and the second micrometer fibers modified layer (32)
Terminal edge it is seamless continue, and the 3rd micrometer fibers modified layer (41) is around being located at the second micrometer fibers modified layer (32) outside
Side, the leading edge of the 3rd micrometer fibers modified layer (42) and the terminal edge of the 3rd nanofiber modified layer (41) are without sewing up
Continuous, the 3rd micrometer fibers modified layer (42) is around the outside for being located at the 3rd nanofiber modified layer (41).
3. composite modified gas-liquid coalescing filter according to claim 2, it is characterised in that along the footpath of tubular skeleton (10)
To direction from inside to outside,
The hole of first nanofiber modified layer (21), the second nanofiber modified layer (31) and the 3rd nanofiber modified layer (41)
Footpath gradually increases；
The hole of first micrometer fibers modified layer (22), the second micrometer fibers modified layer (32) and the 3rd micrometer fibers modified layer (42)
Footpath gradually increases.
4. composite modified gas-liquid coalescing filter according to claim 3, it is characterised in that
The aperture ratio of the aperture of first nanofiber modified layer (21) and the second nanofiber modified layer (31) is 0.3 to 0.9,
The aperture ratio of the aperture of first micrometer fibers modified layer (22) and the second micrometer fibers modified layer (32) is 0.4 to 0.9.
5. composite modified gas-liquid coalescing filter according to claim 3, it is characterised in that the second nanofiber modified layer
(31) aperture and the aperture ratio of the 3rd nanofiber modified layer (41) is 0.3 to 0.9, the second micrometer fibers modified layer (32)
Aperture and the 3rd micrometer fibers modified layer (42) aperture ratio be 0.4 to 0.9.
6. composite modified gas-liquid coalescing filter according to claim 2, it is characterised in that
The thickness of first nanofiber modified layer (21), the second nanofiber modified layer (31) and the 3rd nanofiber modified layer (41)
Degree is 5 microns to 25 microns；
The thickness of first micrometer fibers modified layer (22), the second micrometer fibers modified layer (32) and the 3rd micrometer fibers modified layer (42)
Degree is 0.1mm to 3mm.
7. composite modified gas-liquid coalescing filter according to claim 1, it is characterised in that the first micrometer fibers modified layer
(22) fitted on the inside of head end by the first glue-line with the outside of the first nanofiber modified layer (21), the first micrometer fibers are modified
By the second glue-line with being fitted on the outside of the end of the first nanofiber modified layer (21) on the inside of the end of layer (22), the second Nanowire
Fitted on the inside of the head end of dimension modified layer (31) by the 3rd glue-line with the outside of the first micrometer fibers modified layer (22).
8. composite modified gas-liquid coalescing filter according to claim 7, it is characterised in that first glue-line, described
Second glue-line and the 3rd glue-line are constituted by multiple glue spraying points, multiple glue spraying points and the 3rd glue of first glue-line
Axile displacement of the multiple glue spraying points of layer along tubular skeleton (10) is set.
9. composite modified gas-liquid coalescing filter according to claim 1, it is characterised in that the composite modified gas-liquid is gathered
Tying filter also includes the distal edge of drain layers (50), the leading edge of drain layers (50) and the second micrometer fibers modified layer (32)
Edge is seamless to continue, and is fitted on the inside of the end of drain layers (50) with the outside of the second micrometer fibers modified layer (32).
10. composite modified gas-liquid coalescing filter according to claim 1, it is characterised in that the aperture of drain layers (50)
More than or equal to 70 μm, the thickness of drain layers (50) is 0.1mm to 3mm.
11. composite modified gas-liquid coalescing filter according to claim 1, it is characterised in that the first filter layer (20)
Short transverse and the short transverse of the second filter layer (30) along the axially arranged of cylindrical skeleton (10), the first filter layer (20)
Height and the height of the second filter layer (30) are identical with the axial height of cylindrical skeleton (10).
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