CN101322890A - Filter material and use - Google Patents
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- CN101322890A CN101322890A CNA2007100232831A CN200710023283A CN101322890A CN 101322890 A CN101322890 A CN 101322890A CN A2007100232831 A CNA2007100232831 A CN A2007100232831A CN 200710023283 A CN200710023283 A CN 200710023283A CN 101322890 A CN101322890 A CN 101322890A
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Abstract
The invention discloses a filter material and the application thereof. The filter material has a three-layer structure including a filter layer, a non-filter layer and an intermediate fabric strengthened layer, wherein, the filter layer is a fibre net which is composed of 10wt percent to 90wt percent of glass fiber with the average diameter which is smaller than 10 microns and 90wt percent to 10wt percent of heat resistant fibre with the average diameter which is 10 microns to 20 microns, the non-filter layer is a fibre net which is composed of heat resistant fibre with the average diameter which is 20 microns to 200 microns, and the intermediate layer is the fibre strengthened layer. The filter material has high dust arresting efficiency; after the removal of dusts from the surface of the filter material, the increase of the pressure loss is low, and as the longer the dust removal period reduces the damage to the filter material caused by the excessive blowing times by compressed air within a certain time, the service life of the filter material is prolonged and the cost is reduced.
Description
Technical field:
The present invention relates to a kind of filtering material and purposes.
Background technology:
Along with Chinese society; improving constantly of constant development of economy and living standards of the people; people will be more and more higher to the quality requirement of atmospheric environment; be control coal-burning power plant Air Pollutant Emission; protection life and ecological environment; implement STRATEGIES OF SUSTAINABLE DEVELOPMENT; China has come into effect the national pollutant emission standard of new revision in 2004; divided for three periods stipulated the Air Pollutant Emission limit value of thermal power plant; proposed 2005 and the sulfur dioxide that thermal power plant in 2010 should carry out and the emission limit of flue dust, wherein the low limit value of dust emission standard near or reach the standard of developed country.
The enforcement of new standard is that newly-built coal-burning power plant or old coal-burning power plant's dust pelletizing system are all had higher requirement to China at present, takes the most reliable the most effective dedusting technology imperative.Being presented in the domestic market below becomes the bag-type dusting and the main filtration mechanism of main flow gradually.
Sack cleaner is compared to electric cleaner, and to have a device structure simple, and operation maintenance is convenient; Cost and operating cost are lower; Filter efficiency is not subjected to the influence of gas and dust characteristic; Can handle the high gas of dust content; Efficiency of dust collection height, but advantage thereby quilt application more and more widely such as the dust granules of filtering sub-micron level.
Filtering material purifies the principle of dusty gas and divides in-depth filtration and surface filtration.So-called surface filtration is to rely on the filtering material surface fully to capture dust, and wherein inertial collision and interception effect play a leading role; In-depth filtration be with particle capture in the filter material deep layer, and the just filtration on surface." the first muffin layer " that utilization forms on the filtering material surface reduces the filtrate space and improves filter efficiency.Its work principle of filter is except inertia and interception effect, and diffusion effect also plays an important role.
As being configured for filtering from briquette boiler, the fiber of the filtering material of the high-temperature exhaust air that incinerator or Metal Melting furnace etc. are discharged, use is by hear resistance and good polyphenylene sulfide (the being designated hereinafter simply as PPS) fiber of chemical proofing, glass fibre, meta-aromatic polyamide fiber (meta-aramid fibers), the PTFE fiber, the filtering material that non-woven fabrics such as polyimide fiber constitute.Especially the PPS fiber has good hydrolytic resistance, and therefore acid resistance and alkali resistance are extensively used with filter bag as the dedusting of briquette boiler.
Use the contour performance fibers of PPS, PTFE good as the strainability of the filtering material (as pure PPS filter material, ePTFE overlay film filter material) of raw material, but owing to it costs an arm and a leg, the use cost height will influence the little thermal power plant engineering newly-built or the transformation dust pelletizing system that some scales are less, fund is not abundant and launch smoothly.Therefore the increasingly stringent that requires in country to atmosphere pollutants emission standards, the policy requirements of power plant being set up the dust-removal and desulfurizing facility puts more effort, and under the situation about holding at high price of high-performance fiber filter bag, the market exigence is a kind of can to satisfy the filter bag product that environmental requirement has lower price again.
Summary of the invention:
The object of the present invention is to provide a kind of strainability is good, cost is low a kind of filtering material and purposes.
The present invention has adopted following method in order to achieve this end.
A kind of filtering material, it is characterized in that: this filtering material has three-decker: filter surface layer, non-filtration surface layer, intermediate fabric enhancement layer, wherein filter surface layer and mix the fleece of forming at 10～20 μ m heat resistance fibers by containing the glass fibre and the 90wt%～10wt% average diameter of 10wt%～90wt% average diameter below 10 μ m, non-filtration surface layer is the fleece that the heat resistance fiber below the 200 μ m is formed more than the 20 μ m by average diameter, and the intermediate layer is the fabric enhancement layer.
The porosity of this filtering material is 40%-90%;
Porosity (%)=(density (g/cm that forms filtering material fiber
3Density (the g/cm of)-filtering material
3))/form the density (g/cm of filtering material fiber
3) * 100%.
According to JIS L 1096 standards, the grammes per square metre of this filtering material is at 400-800g/m
2Between.
According to JIS L 1096 standards, this filtering material draw Zhang Qiangdu radially more than 500N/5cm, broadwise is more than 500N/5cm.
Filtering the surface layer web surface partly is the pars fibrosa of handling through the fusion adhesion.
The fiber that constitutes intermediate fabric enhancement layer fabric is a heat resistant fibre, preferred short fiber of heat resistant fibre or bicomponent filament yarn.
The application of a kind of filtering material in the preparation filter bag.
In the present invention, so-called filtering surface is illustrated in surface filtration with in the filtering material, comprises the initial face that contacts with filtering material of air of dust.Be illustrated in promptly that filtering material surface captures dust and the face that forms dust layer.In addition, with the face of its opposition side, the face of promptly having removed the air discharge of dust is defined as non-filtering surface.Among the present invention, so-called intermediate fabric enhancement layer is meant a kind of sparse tissue layer that is formed by yarns interwoven, can make filtering material that certain mechanical strength is arranged by using the fabric enhancement layer.Keel are meant and support the skeleton cylindraceous that filtering material uses, generally are made of metal.
Adding glass fibre at filtering surface, is by reducing the average pore size of filtering surface hole, reach the effect of both surface filtration, improving the arresting efficiency of filtering material to dust.But all use glass fibre, the intensity on surface can be not enough, can influence the service life of filtering material like this.Therefore adopted method in the present invention, satisfied the requirement of intensity and high arresting efficiency simultaneously glass fibre and heat resistant fibre mixing.
In the fleece that filters surface layer, when the content of glass fibre surpassed 90wt%, fleece compactness is excessive to cause pressure loss increase and intensity and folding resistance to descend, thereby inapplicable; And the content of glass fibre is when being lower than 10wt%, and fibroreticulate compactness reduces, thereby can't reach the effect that strengthens strainability.As forming the fibroreticulate fiber of above-mentioned filtering surface, from obtaining higher dust catching efficient, the average fibre diameter that the average fibre diameter of selecting to contain 30wt%～70wt% is less than or equal to the glass fibre of 10 μ m and 70wt%～30wt% is greater than 10 μ m and be less than or equal to the heat resistant fibre of 20 μ m.The average fibre diameter that the average fibre diameter that preferably contains 40wt%～60wt% is less than or equal to the glass fibre of 10 μ m and 60wt%～40wt% is greater than 10 μ m and be less than or equal to the heat resistant fibre of 20 μ m.
In addition, in the filtering surface diameter of glass fibre below 10 μ m and the diameter of filtering surface heat resistant fibre be 10-20 μ m.When the diameter of filtering surface glass fibre was too small, it was too high and increased the pressure loss of filter felt to cause fleece compactness; When the diameter of glass fibre during greater than 10 μ m, the folding resistance of glass fibre reduces greatly, thus the diameter of glass fibre below the 10 μ m and the diameter of preferred glass fibers between 2-8 μ m.The diameter of filtering surface heat resistant fibre is during greater than 20 μ m, and fibroreticulate porosity increases, and the dust catching efficient of filter felt can reduce and can't reach environmental requirement; When the diameter of filtering surface heat resistant fibre during less than 10 μ m, at first fleece compactness is too high and increased the pressure loss of filter felt, secondly superfine fiber price is also expensive than general fibre, so the heat resistant fibre diameter that filtering surface is selected for use is at 10-20 μ m, preferred 12-18 μ m.Here the average diameter of fiber is meant the mean value by 50 measured fibre diameters of SEM.Filtering surface refers to regard to surface filtration with regard to filtering material of thermal stability, is meant the initial one side that contacts with filtering material of thermal stability of the gas that contains dust, and dust is captured by the filtering material of thermal stability surface, forms the one side (being that gas flows into face) of dust layer.
Non-filtration surface layer is that average diameter is the fleece that the following heat resistance fiber of the above 200 μ m of 20 μ m forms among the present invention.This non-filtering surface mainly has been the effect of supporting, and dust removal by filtration is helped out, and is to consider from angle that reduces the pressure loss and the wearability (mainly with the keel friction) that increases filtering material.If add crude fibre in filtering material, thereby the aperture that can increase filtering material reduces the pressure loss, so the present invention reduces the pressure loss by use coarse-fibred method in the relatively little non-filtering surface of filtration.
When the average fibre diameter that uses when 20 μ m are following, cause the fleece densification, venting quality is low and the pressure loss is excessive, and is therefore inapplicable; When the average fibre diameter that uses when 200 μ m are above, fleece is lax, its mechanical strength can be lower, and is therefore also inapplicable.Selecting average diameter among the present invention is that 20-200 μ m crude fibre forms non-filtering surface, and preferred crude fibre average diameter is 20-100 μ m, and more preferably coarse-fibred average diameter is 20-50 μ m.
The heat resistant fibre that uses among the present invention can be para-aramid fiber, meta-aromatic polyamide fiber, PPS fiber, polyimide fiber, fluorine series fiber.Wherein preferred polyphenylene sulfide fibre, polyphenylene sulfide (being designated hereinafter simply as PPS) fiber is the 90wt% of its component unit or contains more than the 90wt%-(C
6H
4-S)
nThe fiber that the polymer of the phenylene sulfide construction unit of-expression constitutes.By using the PPS fiber, can access the good filtering material of hear resistance, chemical proofing and hydrolytic resistance.The glass fibre that uses among the present invention can be high-strength glass fibre, high-modulus glass fiber, refractory glass fibre, acid-resistant glass fiber, simple glass fiber (referring to alkali-free and medium-alkali glass fibre), glass fiber with low dielectric constant etc.Wherein preferred dielectric glass fibre and simple glass fiber (referring to alkali-free and medium-alkali glass fibre), dielectric glass fibre (D-glass) is to draw the glass fibre that forms with low dielectric glass, and its dielectric constant and medium consumption factor are all less than alkali-free glass fibre.Glass fibre (be called for short: glass) cheap, material source is sufficient, do not fire, fiber itself performance such as does not shrink (280 ℃ the time during good, the actual serviceability temperature of high temperature resistant (conventional serviceability temperature can reach 260 ℃), high strength, insulating properties, the shrinkage factor of glass fibre is 0%), dimensional stability is superior, thereby glass fibre and polyphenylene sulfide fibre mixed make filtering material have both advantages concurrently.
Filtering material making of the present invention aspect as making fibroreticulate method, can use routine to make short fiber form fibroreticulate method by carding machine.Resulting fleece, use is extruded roller and is applied light compression, after formation is called the state of lap, utilizes needle point method to make the mutual complexing of fiber at thickness direction, makes the fleece of filtering surface one side and non-filtering surface one side.Stack gradually filtering surface one side fleece, strengthen the fleece of fabric and non-filtering surface one side after, undertaken integrated by complexing.Described complexing method is preferably selected from least a method in needle point method and the water spray perforation method, also available additive method.
As the porosity of filtering material, preferably in the scope of 40%-90%, porosity is greater than 90% filtering material, the arresting efficiency of dust is reduced, and porosity is less than 40% filtering material, and throughput is low excessively, improve the pressure loss, increased the energy consumption of dust removal machine blower fan.Preferable porosity is 60%-85%, and more preferably porosity is 70%-85%.The definition of porosity here is: the volume of gap accounts for the percentage of filtering material volume in the filtering material.Calculating formula is: porosity (%)=(density (g/cm that forms filtering material fiber
3Density (the g/cm of)-filtering material
3))/form the density (g/cm of filtering material fiber
3) * 100%.Here, the density of filtering material fiber is meant the density (g/cm that forms fiber net fiber
3), the density of filtering material is that the grammes per square metre of filtering material is removed in the thickness of filtering material.The grammes per square metre here is meant the weight of unit square rice filtering material.The density of filtering material fiber (PPS) is 1.34g/cm
3The density of glass fibre is 2.56g/cm
3
Filtering material of the present invention is as the filtering material that is used for flue gas ash removal, must satisfy the requirement of arresting efficiency, the grammes per square metre large increase cost, grammes per square metre is too little, and to play the fleece of dust removal by filtration effect too thin, can't satisfy the effect of high arresting efficiency, so grammes per square metre is at 400-800g/m
2Be suitable, further preferred grammes per square metre is 450-700g/m
2The grammes per square metre here is meant the weight of unit square rice filtering material.
Filtering material of the present invention is the filtering material that is used for high temperature fume dust removal, the environment of high-temperature flue gas is the temperature height, have chemical corrosivity, characteristics such as while dust in flue gas concentration height, so filtering material must have certain intensity to satisfy the environment of high-temperature flue gas.Filtering material in use must overcome the gravity of self and the gravity of appendix dust in addition, and during deashing compressed air to the impulsive force of filtering material.Therefore the filtering material brute force is preferably more than 500N/5cm.
Filtering the surface layer web surface partly is the pars fibrosa of handling through the fusion adhesion.Filtering material of the present invention by filtering material is carried out the fusion adhesion in the surface of one side at least, can further improve dust peeling property energy or dust catching efficient.As the method for a part of fusion adhesion that makes web surface, can adopt the methods such as processing or light processing of singing.Particularly requiring under the high situation of dust catching efficient, the fleece that preferably uses filtering surface implement to handle specifically, utilizes the processing of singing of burning flame or infrared ray heating etc. in filtering surface one side of filtering material, or pressurizes with hot-rolling.By such processing, at least a portion generation fusion of the web surface of filtering surface one side is adhered improve filtering material dust catching efficient.The adhesion of the fusion here is meant: the part of fiber mixes the state that forms moisture film after by chemistry or physical method liquefy shape.
In the present invention, the fabric enhancement layer works to keep mechanical strength, therefore is fit to use tensile strength to be the fabric enhancement layer more than the 400N/5cm.Constitute the fiber of fabric enhancement layer,, can use para-aramid fiber, meta-aromatic polyamide fiber, PPS fiber, polyimide fiber, fluorine series fiber, carbon fiber, glass fibre etc. so long as it is just passable to have a stable on heating fiber.Especially from the viewpoint of chemical proofing, hydrolytic resistance, preferred use is selected from the fiber of PPS fiber and fluorine series fiber.Consider from the high aspect of mechanical strength, most preferably the PPS fiber.In addition, the mechanical strength of fluorine series fiber is poorer than the PPS fiber, but hear resistance and chemical proofing are good, when therefore using in special rigorous environment, preferably uses the fluorine series fiber.In order not influence the pressure loss as strainability, base cloth is preferably formed sparse weave.As general structure, plain weave, double-layered structure, three-layer weave, twill-weave, satin weave etc. are arranged.Particularly low-cost, widely used plain cloth can obtain satisfied performance, therefore preferred the use.The preferred warp count of Density is 10～40/2.54cm preferably, is more preferably 20～30/2.54cm, and weft count is 10～30/2.54cm preferably, is more preferably 10～20/2.54cm.The fabric enhancement layer here refers in the middle of filtering surface and non-filtering surface, works the fabric that strengthens mechanical forceful action by what heat resistant fibre constituted.
Fiber as constituting the fabric enhancement layer preferably uses staple yarn or bicomponent filament yarn.More preferably use the yarn of short fiber, staple yarn and fibroreticulate complexing are good, and it is many that the surface area of fiber becomes, and are suitable on the dust catching efficient of filtering material improves this aspect therefore.
After the filtering material that so makes is made pouch, be suitable as and require the stable on heating filter bag that dedusting is carried out in the exhaust of incinerator or coal-burning boiler or Metal Melting furnace etc.As the suture that uses in making at this, preferably use and the fiber that constitutes fabric similarly with having the line that chemical proofing, stable on heating fibrous material constitute, be fit to use PPS fiber or fluorine cellulose fiber etc., preferred PPS or fluorine cellulose fiber.
Dust catching efficient height of the present invention, the rising of the pressure loss was little after the filtering material surface dust was removed, and because the elongated damage that in the regular hour, reduces the compressed air spraying number of times to filtering material of cleaning cycle time, thereby can prolong service life of filtering material.In addition, filtering material thermal dimensional stability at high temperature is good.Filter bag of the present invention, constitute by above-mentioned filtering material, therefore the dust catching efficient that is included in the exhaust is good, and and mechanical strengths such as the wearability of keel or fracture strength, stiffness, dimensional stability good, thereby can make the filtering material long lifetime.Owing to filtering material of the present invention and filter bag, be particularly suitable as filtration and use with filter cloth and by its filter bag that constitutes in addition from the dedusting of the high-temperature gas of discharges such as incinerator, coal-burning boiler or Metal Melting furnace.
Description of drawings:
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the decomposing section of the filtering material that the present invention relates to.
Among the figure: 1, filter surface layer, 2, the fabric enhancement layer, 3, non-filtration surface layer.
Below, illustrate in greater detail the present invention by embodiment, but the present invention is not subjected to the restriction of these embodiment.The assay method of each rerum natura of filtering material is as follows.
[weight per unit area]
Filtering material is cut into the square of 200 * 200mm, calculates the weight per unit area of filtering material from weight.
[thickness]
Used thickness amesdial (extruding force 0.000245Pa) is measured the thickness of filtering material.Select measure at random at 6, obtain mean value.
[fracture strength]
Measure the fracture strength of filtering material based on the fracture strength method of JISL 1096 regulations.Measuring the position is to select measure at random at 5.
[Air permenbility]
Measure the Air permenbility of filtering material based on the Fu Leize type fabric breathability method of testing of JISL 1096 regulations.Measuring the position is to select measure at random at 6.
[VDI3926 arresting efficiency]
Based on the performance of the standard test filtering material of VDI3926, the size of laboratory sample is φ 150mm, and the dust concentration of feeding is at 5g/m3, and filtration velocity is 2m/min.The order of experiment is initial stage 30 times+stabilisation 5000 times+last 30 times.Initial stage here 30 times and last 30 times method are, prolongation along with running time, the pressure reduction on filtering material two sides can raise gradually, when arriving 1000Pa, pulse of air is carried out deashing to the dust on filtering material surface, carries out next process then, and this process is carried out 30 times altogether, record pressure and the variation of time in the process of experiment, detection simultaneously is not filtered the concentration of the dust of material capture.Stabilization procedures is meant in the process of operation, is the time interval filtering material to be carried out deashing with 5s, carries out altogether 5000 times.Here the pressure of the deashing of indication is 5bar.
[pressure loss]
Behind the determination test of VDI3926, the loss of the residual pressure of filtering material.
[filtering material intensity]
Measure the tensile strength of filtering material based on the cloth intensity method of JISL 1096 regulations.Specimen size is 200mm * 50mm, measures with draw speed 100mm/min, chuck interval 100mm.Measured value is the value of 1 intensity in the warp-wise (be the direction vertical with the orientation of fiber, under the situation of the sample that comprises crash and the same direction of the warp-wise of crash) of sample.
Embodiment 1
Use the PPS short fiber (Dongli Ltd.'s system " Te Kang ") of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm, obtain warp thread 20S/2, weft yarn 20s.Make its plain weave, obtain the PPS short-fibre silk plain cloth of 30/2.54cm of organizine density, 14/2.54cm of tram density.
With this fabric as base cloth, therein on face with 198g/m
2The stacked fleece of weight per unit area, this fleece is that the glass fibre of the PPS short fiber (Dongli Ltd.'s system " Te Kang " S101-2.2T 51mm) of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm and fiber number 0.75dtex (fibre diameter 6 μ m), coupe 50mm carries out after short fiber that mixed cotton obtains implements opener, comb and parallel cotton fibers prior to spinning and handle with weight ratio at 80: 20, with 50/cm of thorn pin density
2Carry out acupuncture and obtain, this fleece forms the filter course of filtering surface one side.On the face of the opposite side of fabric with 198g/m
2The stacked following fleece of weight per unit area, this fleece is that PPS short fiber (Dongli Ltd.'s system " Te Kang " S101-7.8T51mm) 100wt% with fiber number 7.8 dtexs (average fibre diameter 27.2 μ m), coupe 51mm carries out after opener, comb and parallel cotton fibers prior to spinning handle, with 50/cm of thorn pin density
2Carrying out acupuncture obtains.This fleece forms the filter course of non-filtering surface one side.Further fabric (base cloth) and above-mentioned fleece are interweaved, obtain weight per unit area 615g/m by acupuncture processing
2, total 300/cm of needling density
2Filtering material, at last to the processing of singing of the filtering surface of filtering material.In addition, see in the filtering material that obtains thus owing to acupuncture handle shrink, weight per unit area is than the tendency that uprises in theory.
As the fibroreticulate fiber that constitutes filtering surface one side, the PPS short fiber of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm and the glass fibre of 0.75dtex (fibre diameter 6 μ m), coupe 50mm are mixed use by 70: 30 weight ratio.As the fibroreticulate fiber that constitutes non-filtering surface one side, use fiber number 7.8 dtexs (average fibre diameter is 27 μ m) of 100wt%, the PPS short fiber of coupe 51mm.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Embodiment 3
As the fibroreticulate fiber that constitutes filtering surface one side, the PPS short fiber of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm and the glass fibre of 0.75dtex (fibre diameter 6 μ m), coupe 50mm are mixed use by 60: 40 weight ratio.As the fibroreticulate fiber that constitutes non-filtering surface one side, use fiber number 7.8 dtexs of 100wt%, the PPS short fiber of coupe 51mm.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Embodiment 4
As the fibroreticulate fiber that constitutes filtering surface one side, the PPS short fiber of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm and the glass fibre of 0.75dtex (fibre diameter 6 μ m), coupe 50mm are mixed use by 50: 50 weight ratio.As the fibroreticulate fiber that constitutes non-filtering surface one side, use fiber number 7.8 dtexs of 100wt%, the PPS short fiber of coupe 51mm.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
The filtering material that contains polyphenylene sulfide fibre and glass fibre that embodiment 1～4 obtains can be used to make filter bag.
Comparative example 1
As the fibroreticulate fiber that constitutes filtering surface one side, use fiber number 2.2 dtexs (average fibre diameter 14.5 μ m) of 100wt%, the PPS short fiber of coupe 51mm.Further, as the fibroreticulate fiber that constitutes non-filtering surface one side, use fiber number 7.8 dtexs of 100wt%, the PPS short fiber of coupe 51mm.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Comparative example 2
The short fiber of PPS short fiber (the S101-2.2T 51mm of Dongli Ltd. " the Te Kang ") 100wt% of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm is carried out after opener, comb and parallel cotton fibers prior to spinning handle, with 40/cm of needling density
2Carry out false acupuncture, obtain forming the fleece that air flows into the filter course of face and air discharge face, this fibroreticulate weight per unit area is respectively 220g/m
2And 220g/m
2In addition, with forming filtering material, obtain weight per unit area 562g/m with embodiment 1 identical method
2Filtering material.
Comparative example 3
As the fibroreticulate fiber that constitutes filtering surface one side, use the glass fibre of 0.75dtex (fibre diameter 6 μ m), coupe 50mm.As the fibroreticulate fiber that constitutes non-filtering surface one side, use fiber number 7.8 dtexs of 100wt%, the PPS short fiber of coupe 51mm.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
From the evaluation result of table 1 as can be known, the filtering material of embodiment 1～4 is compared with 3 filtering material with comparative example 1,2, dust catching efficient height, and also the loss of the residual pressure of filtering material is also low.Further, embodiment 2,3,4 is better more, and more further, embodiment 3 is best.The arresting efficiency height of filtering material, the pressure loss does not uprise yet.The mechanical strength of filtering material is good simultaneously, and be possible the service life that therefore prolongs filtering material.
Table one:
Claims (8)
1, a kind of filtering material, it is characterized in that: this filtering material has three-decker: filter surface layer, non-filtration surface layer, intermediate fabric enhancement layer, wherein filtering surface layer is that glass fibre below the 10 μ m and 90wt%～10wt% average diameter are that 10～20 μ m heat resistance fibers mix the fleece of forming by containing 10wt%～90wt% average diameter, non-filtration surface layer is the fleece that the heat resistance fiber below the 200 μ m is formed more than the 20 μ m by average diameter, and the intermediate layer is the fabric enhancement layer.
2, a kind of filtering material according to claim 1 is characterized in that: the porosity of this filtering material is 40%-90%;
Porosity (%)=(density (g/cm that forms filtering material fiber
3Density (the g/cm of)-filtering material
3))/form the density (g/cm of filtering material fiber
3) * 100%.
3, filtering material according to claim 1 and 2 is characterized in that: according to JIS L 1096 standards, the grammes per square metre of this filtering material is at 400-800g/m
2Between.
4, a kind of filtering material according to claim 1 and 2 is characterized in that: according to JISL 1096 standards, this filtering material draw the Zhang Qiangdu warp-wise more than 500N/5cm, broadwise is more than 500N/5cm.
5, a kind of filtering material according to claim 1 and 2 is characterized in that: filtering the surface layer web surface partly is the pars fibrosa of handling through the fusion adhesion.
6, a kind of filtering material according to claim 1 and 2 is characterized in that: the fiber that constitutes intermediate fabric enhancement layer fabric is a heat resistant fibre.
7, a kind of filtering material according to claim 6 is characterized in that: heat resistant fibre is short fiber or bicomponent filament yarn.
8, the application of the described a kind of filtering material of a kind of claim 1 in the preparation filter bag.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100232831A CN101322890A (en) | 2007-06-14 | 2007-06-14 | Filter material and use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100232831A CN101322890A (en) | 2007-06-14 | 2007-06-14 | Filter material and use |
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|---|---|
| CN101322890A true CN101322890A (en) | 2008-12-17 |
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ID=40186684
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| CN101920139A (en) * | 2010-09-30 | 2010-12-22 | 重庆再升科技发展有限公司 | Air filter material with tencel fiber and manufacturing method thereof |
| CN101711932B (en) * | 2008-10-08 | 2013-08-21 | 东丽纤维研究所（中国）有限公司 | Base cloth for filter material and production method thereof |
| CN105731394A (en) * | 2015-12-31 | 2016-07-06 | 安阳市岷山有色金属有限责任公司 | Refined sulfuric acid preparation device and preparation method thereof |
| CN112218698A (en) * | 2018-06-08 | 2021-01-12 | 西格里碳素欧洲公司 | Filter media comprising reinforced nonwoven |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101711932B (en) * | 2008-10-08 | 2013-08-21 | 东丽纤维研究所（中国）有限公司 | Base cloth for filter material and production method thereof |
| CN113680139A (en) * | 2009-12-22 | 2021-11-23 | 贺氏（苏州）特殊材料有限公司 | Filter media and articles comprising dendrimers and/or other components |
| CN101920139A (en) * | 2010-09-30 | 2010-12-22 | 重庆再升科技发展有限公司 | Air filter material with tencel fiber and manufacturing method thereof |
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| CN112218698A (en) * | 2018-06-08 | 2021-01-12 | 西格里碳素欧洲公司 | Filter media comprising reinforced nonwoven |
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