CN101766933A - Filter material and application - Google Patents
Filter material and application Download PDFInfo
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- CN101766933A CN101766933A CN200910029148A CN200910029148A CN101766933A CN 101766933 A CN101766933 A CN 101766933A CN 200910029148 A CN200910029148 A CN 200910029148A CN 200910029148 A CN200910029148 A CN 200910029148A CN 101766933 A CN101766933 A CN 101766933A
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Abstract
The invention discloses a filter material and an application thereof, wherein the filter material is of a three-layer structure as follows: a filter surface layer, a non-filter surface layer and a middle fabric enhancement layer, wherein the structures of the three layers are both composed of heat resistant fibre of which the strength is between 1.5 CN/ dtex and 7.0 CN/ dtex. The invention provides the filter material with high strength, low flexibility and excellent size stability and the application thereof, the service life of the filter material can be prolonged and the filter material can be used for preparing filter bags and the like.
Description
Technical field:
The present invention relates to a kind of filtering material and purposes.
Background technology:
China is the developing country of an energy resource structure based on coal, and coal accounts for 3/4 of China energy consumption, is that the thermal power generation of the energy accounts for 80% of total electricity production with coal.Therefore the atmosphere pollution of China is coal-smoke pollution mainly just.All kinds of dust arresters that are directed to this pollution also arise at the historic moment, in the use of nearly decades, progressively eliminated the low devices of efficiency of dust collection such as gravitational settling, cyclone dust removal, and efficiency of dust collection is not high and can cause the semidry method dust arresters such as moisture film method of secondary pollution.And form the mode of present big machine assembly wet dedusting, the dedusting of medium and small unit distribution or bag-type dusting, but along with the emission request of country's raising in recent years, the efficiency of dust collection of electric precipitation can't reach emission request, thereby the high sack cleaner of efficiency of dust collection is used more and more.
Advantages such as sack cleaner has the efficiency of dust collection height with respect to electric cleaner, and device structure is simple, operating cost is low.But sack cleaner has in use also run into some problems, occurs in these problems at most and what deduster was had the greatest impact is that filter bag lost efficacy.Well-known filter bag is the heart of sack cleaner, and the quality of filter bag is directly connected to the operation of sack cleaner.A lot of filter bags that lost efficacy have all occurred damaged and have lost powerfully once the situation of tearing broken, and this is because the complexity of flue gas situation, the temperature height of flue gas on the one hand, but the prior brute force that is likely filter bag itself lowly due to.Therefore at this type of situation, country has also released the up-to-date national standard in standard filter bag market, and the radially brute force of regulation filter bag is not less than 900N/5cm, and the broadwise brute force is not less than 1200N/5cm.Its warp-wise intensity of filtering material described in patent No. CN1767882 is about 850N/5cm, and this filtering material can't satisfy the requirement of new nation's standard.The present invention is in order to cooperate the release of new nation's standard, propose to use the heat resistant fibre of high-tenacity to do filtering material, make the brute force of filtering material can satisfy and be higher than the value of national standard defined, develop the filtering material of a kind of high-strength flatness and excellent size stability, long service life.
Summary of the invention:
The object of the present invention is to provide that a kind of superhigh intensity, degree of stretching are low, the filtering material of excellent size stability, long service life and uses thereof.
Filtering material of the present invention has three-decker: filter surface layer, non-filtration surface layer, intermediate fabric enhancement layer, and this three-decker is formed by heat resistant fibre, its intensity is at 1.5CN/dtex～7.0CN/dtex, and preferred 4.5CN/dtex～7.0CN/dtex is when fibre strength is lower than 1.5CN/dtex, interfibrous cohesive force is low, bounding point reduces, and bonding force weakens, and the degree of utilizing of fibre strength reduces, filtrate intensity also reduces, and is unfavorable for long-term use.Can satisfy up-to-date national standard by intensity at the twice-laid filtering material of 4.5CN/dtex～7.0CN/dtex, be filtering material draw the Zhang Qiangdu warp-wise more than 950N/5cm, broadwise is more than 1600N/5cm, not only intensity is improved this filtering material significantly but also degree of stretching also decreases, dimensional stability is good, has prolonged service life.The fibre strength here is according to JIS L 1096 standards, tests the mean value of the intensity of 50 fibers that extract from filtrate by the monofilament strength tester.Here, the so-called surface layer that filters is illustrated in surface filtration with in the filtering material, comprises the initial face that contacts with filtering material of air of dust.That is, be illustrated in 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-filtration surface layer.
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 this filtering material draw the Zhang Qiangdu warp-wise more than 950N/5cm, broadwise is drawn Zhang Shendu warp-wise≤35% more than 1600N/5cm, broadwise≤50%.
Filter the fleece that surface layer and non-filtration surface layer are made up of at the heat resistant fibre of 5～30 μ m average diameter among the present invention, the diameter of the heat resistant fibre of filtering surface is during greater than 30 μ m, 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 5 μ m, fleece compactness is too high and increased the pressure loss of filter felt, so the heat resistant fibre diameter that filtering surface is selected for use is at 5～30 μ m, preferred 10～30 μ m, further preferred 10～20 μ m.Here the average diameter of fiber is meant the mean value by 50 measured fibre diameters of SEM.
As the porosity of filtering material, preferably in 40%～90% scope, 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.More preferably porosity is 60%～80%.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 the thickness of the grammes per square metre of filtering material divided by filtering material.The grammes per square metre here is meant the weight of unit square rice filtering material.The density of filtering material fiber is 1.34g/cm
3
The grammes per square metre of this filtering material is at 300～1000g/m
2Between.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 and enough brute forces can't be provided, so grammes per square metre is at 300～1000g/m
2Be suitable, further preferred grammes per square metre is 400～800g/m
2The grammes per square metre here is meant the weight of unit square rice filtering material.
The use heat resistant fibre can be one or more in meta-aromatic polyamide fiber, para-aramid fiber, polyphenylene sulfide fibre, PBI fibre, polyimide fiber, melamine-based fiber, glass fibre, the fluorine cellulose fiber among the present invention.From the viewpoint of hear resistance, chemical proofing, hydrolytic resistance, wherein preferred 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 and the fiber of fluorine cellulose fiber.More preferably select the polytetrafluoroethylene (PTFE) of function admirable for use as the fluorine cellulose fiber.Consider from the high aspect of mechanical strength, most preferably the PPS fiber.By using the PPS fiber, can access the good filtering material of hear resistance, chemical proofing and hydrolytic resistance.
Filtering the surface layer web surface partly is to handle 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, preferably using filtering surface to implement the fleece of handling, specifically, utilizing the processing of singing such as burning flame or infrared ray heating in filtering surface one side of filtering material, or pressurize with hot-rolling.By such processing, web surface at least a portion generation fusion of filtering surface one side is adhered improve the arresting efficiency of filtering material dust.The part that the adhesion of the fusion here is meant 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, and the fabric enhancement layer that therefore is fit to use draws the Zhang Qiangdu warp-wise as more than the 850N/5cm, and broadwise is more than the 550N/5cm, draws Zhang Shendu warp-wise and broadwise all between 20%～50%.The fiber that constitutes the intermediate fabric enhancement layer can be meta-aromatic polyamide fiber, para-aramid fiber, PPS fiber, PBI fibre, polyimide fiber, melamine-based fiber, glass fibre, fluorine cellulose fiber.From the viewpoint of chemical proofing, hydrolytic resistance, preferably use PPS fiber and fluorine cellulose fiber.Consider from the high aspect of mechanical strength, most preferably the PPS fiber.In addition, the mechanical strength of fluorine cellulose 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 cellulose 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 20～40/2.54cm, and weft count is 10～30/2.54cm preferably, is more preferably 5～20/2.54cm.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 long filament.More preferably use the yarn of short fiber, staple yarn and fibroreticulate complexing are good, and it is big that the surface area of fiber becomes, and are suitable on the dust catching efficient of filtering material improves this aspect therefore.
The present invention has advantages such as superhigh intensity, degree of stretching are low, excellent size stability, long service life.
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.
Have 1 among the figure, 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]
Use the device of Fig. 1, 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.
Use fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), length 76mm, fibre strength PPS short fiber (Dongli Ltd.'s system " Te Kang " S371-2.2T 76mm), obtain warp thread 20S/2, weft yarn 7s as 4.9CN/dtex.Make its plain weave obtain the PPS short-fibre silk plain cloth of 38/2.54cm of organizine density, 13/2.54cm of tram density, with the enhancing tissue layer of this plain cloth as filtering material.
With fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), length 76mm, fibre strength is that the PPS short fiber of 4.9CN/dtex carries out after opener, comb and parallel cotton fibers prior to spinning handle, with 50/cm of needling density
2Carry out 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 180g/m
2And 180g/m
2Further plain cloth (enhancing tissue layer) and above-mentioned fleece are interweaved, obtain weight per unit area 520g/m by acupuncture processing
2Filtering material, the surface that filtering material the is filtered surface layer processing of singing at last.In addition, this filtering material that obtains owing to acupuncture handle shrink, weight per unit area has than the tendency that uprises in theory.
Use fibre strength to filter the fibroreticulate fiber of surface layer one side as formation as the PPS short fiber of 4.9CN/dtex; Use fibre strength as the PPS short fiber of 4.1CN/dtex as the fibroreticulate fiber that constitutes non-filtration surface layer one side.In addition, employing obtains filtering material with embodiment 1 identical method.
Use fibre strength to filter the fibroreticulate fiber of surface layer one side as formation as the PPS short fiber of 4.1CN/dtex; Use fibre strength as the PPS short fiber of 3.2CN/dtex as the fibroreticulate fiber that constitutes non-filtration surface layer one side.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
The filtering material that the various embodiments described above obtain can be applicable to prepare filter bag.
Comparative example 1
Use fiber number 2.2 dtexs (average diameter 14.5 μ m), length 51mm, fibre strength to obtain warp thread 20S/2, weft yarn 7s as the PPS short fiber of 3.2CN/dtex.Make its plain weave obtain the PPS short-fibre silk plain cloth of 30.5/2.54cm of organizine density, 13/2.54cm of tram density, with the fabric enhancement layer of this plain cloth as filtering material.
Use fibre strength as the PPS short fiber of 1.0CN/dtex as constituting the fibroreticulate fiber that filters surface layer one side.Use fibre strength as the PPS short fiber of 1.9CN/dtex as the fibroreticulate fiber that constitutes non-filtration surface layer one side.In addition, employing obtains filtering material with embodiment 1 identical method.
Comparative example 2
Use fibre strength to carry out after opener, comb and parallel cotton fibers prior to spinning handle, with 40/cm of needling density as the PPS short fiber of 1.9CN/dtex
2Carry out false acupuncture, obtain forming the fleece that filters surface layer and non-filtration surface layer, this fibroreticulate weight per unit area is respectively 200g/m
2And 200g/m
2In addition, with forming filtering material, obtain weight per unit area 565g/m with embodiment 1 identical method
2Filtering material.
From the evaluation result of table one as can be seen, the filtering material of embodiment 1～3 is compared with 2 filtering material with comparative example 1, has embodied the good characteristic of high-strength flatness, and further, embodiment 1 is best.The intensity of filtering material increases substantially, and degree of stretching is low, and dimensional stability is best, and be possible the service life that therefore prolongs filtering material.The The performance test results of the filtering material of above embodiment and comparative example gained gathers in Table 1.
Table one
Claims (9)
1. filtering material, it is characterized in that: this filtering material has three-decker: filter surface layer, non-filtration surface layer, intermediate fabric enhancement layer, this three-decker is formed by heat resistant fibre, and the intensity of heat resistant fibre is between 1.5CN/dtex～7.0CN/dtex.
2. filtering material according to claim 1 is characterized in that: described heat resistant fibre intensity is between 4.5CN/dtex～7.0CN/dtex.
3. filtering material according to claim 1 and 2 is characterized in that: this filtering material draw Zhang Qiangdu warp-wise 〉=950N/5cm, broadwise 〉=1600N/5cm draws Zhang Shendu warp-wise≤35%, broadwise≤50%.
4. filtering material according to claim 1 and 2 is characterized in that: the fleece that described filtration surface layer and non-filtration surface layer are made up of at the heat resistant fibre of 5～30 μ m average diameter.
5. filtering material according to claim 1 and 2 is characterized in that: the porosity of this filtering material is 40%～90%.
6. filtering material according to claim 1 and 2 is characterized in that: the grammes per square metre of this filtering material is at 300～1000g/m
2Between.
7. filtering material according to claim 1 and 2 is characterized in that: described heat resistance fiber is one or more in meta-aromatic polyamide fiber, para-aramid fiber, polyphenylene sulfide fibre, PBI fibre, polyimide fiber, melamine-based fiber, glass fibre, the fluorine cellulose fiber.
8. filtering material according to claim 1 and 2 is characterized in that: described filtration surface layer web surface partly is to handle through the fusion adhesion.
9. the application of the described filtering material of claim 1 in the preparation filter bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910029148A CN101766933A (en) | 2009-01-06 | 2009-01-06 | Filter material and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910029148A CN101766933A (en) | 2009-01-06 | 2009-01-06 | Filter material and application |
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|---|---|
| CN101766933A true CN101766933A (en) | 2010-07-07 |
Family
ID=42500127
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|---|---|---|---|
| CN200910029148A Pending CN101766933A (en) | 2009-01-06 | 2009-01-06 | Filter material and application |
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Cited By (8)
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|---|---|---|---|---|
| CN103170182A (en) * | 2011-12-23 | 2013-06-26 | 东丽纤维研究所（中国）有限公司 | Filtering material for dedusting and low-temperature denitration, and preparation method and application thereof |
| CN103432825A (en) * | 2013-09-03 | 2013-12-11 | 洛阳多维丝环保科技有限公司 | Filter bag special for blast furnace gas |
| CN104043289A (en) * | 2013-03-15 | 2014-09-17 | 东丽纤维研究所（中国）有限公司 | Filter material containing catalyst layer and production method and application thereof |
| CN104178934A (en) * | 2014-07-17 | 2014-12-03 | 常熟璟杰无纺制品有限公司 | Heat-resistant non-woven fabric |
| CN104652040A (en) * | 2015-01-14 | 2015-05-27 | 上海特安纶纤维有限公司 | Filtering material containing blended aromatic polyamide fiber with sulfonyl groups and high-temperature-resistant fiber and manufacturing method of filtering material |
| CN106925032A (en) * | 2015-12-31 | 2017-07-07 | 财团法人工业技术研究院 | Filtering material |
| CN108778458A (en) * | 2016-03-29 | 2018-11-09 | 东丽株式会社 | The laminated resistance to heat filter of poly arylidene thio-ester |
| CN110225787A (en) * | 2017-01-27 | 2019-09-10 | 帝人富瑞特株式会社 | Bag filter filter cloth and its manufacturing method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170182B (en) * | 2011-12-23 | 2016-07-20 | 东丽纤维研究所（中国）有限公司 | A kind of dedusting and low-temperature denitration filtering material and its production and use |
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| CN104043289A (en) * | 2013-03-15 | 2014-09-17 | 东丽纤维研究所（中国）有限公司 | Filter material containing catalyst layer and production method and application thereof |
| CN104043289B (en) * | 2013-03-15 | 2017-05-24 | 东丽纤维研究所（中国）有限公司 | Filter material containing catalyst layer and production method and application thereof |
| CN103432825A (en) * | 2013-09-03 | 2013-12-11 | 洛阳多维丝环保科技有限公司 | Filter bag special for blast furnace gas |
| CN103432825B (en) * | 2013-09-03 | 2016-04-06 | 洛阳多维丝环保科技有限公司 | The special filter bag of blast furnace gas |
| CN104178934A (en) * | 2014-07-17 | 2014-12-03 | 常熟璟杰无纺制品有限公司 | Heat-resistant non-woven fabric |
| CN104652040A (en) * | 2015-01-14 | 2015-05-27 | 上海特安纶纤维有限公司 | Filtering material containing blended aromatic polyamide fiber with sulfonyl groups and high-temperature-resistant fiber and manufacturing method of filtering material |
| CN106925032A (en) * | 2015-12-31 | 2017-07-07 | 财团法人工业技术研究院 | Filtering material |
| CN108778458A (en) * | 2016-03-29 | 2018-11-09 | 东丽株式会社 | The laminated resistance to heat filter of poly arylidene thio-ester |
| US10688753B2 (en) | 2016-03-29 | 2020-06-23 | Toray Industries, Inc. | Laminated polyarylene sulfide heat-resistant filter |
| CN110225787A (en) * | 2017-01-27 | 2019-09-10 | 帝人富瑞特株式会社 | Bag filter filter cloth and its manufacturing method |
| CN110225787B (en) * | 2017-01-27 | 2021-07-20 | 帝人富瑞特株式会社 | Filter cloth for bag filter and manufacturing method thereof |
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Application publication date: 20100707 |