CN101745270A - Filter material and use thereof - Google Patents
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- CN101745270A CN101745270A CN200810244409A CN200810244409A CN101745270A CN 101745270 A CN101745270 A CN 101745270A CN 200810244409 A CN200810244409 A CN 200810244409A CN 200810244409 A CN200810244409 A CN 200810244409A CN 101745270 A CN101745270 A CN 101745270A
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Abstract
The invention discloses a filter material and use thereof. The filter material adopts a structure having a first polytetrafluoroethylene membrane layer, a second fabric reinforcing layer and a third fiber layer, wherein a intermediate fiber layer, which is a fiber needling combination through layer formed by part of fibers, passing through the second layer, of the third layer when the second layer and the third layer are combined by needling, is arranged between the first and second layers. The filter material of the invention has the advantages that: the efficiency of the capture of the dust in exhausted gases is high; the keel has excellent mechanical strength properties such as wear resistance or fracture strength, high stiffness and stable size; and the service life is long. Thus, the filter material is particularly suitable to be used as dedusting filter cloth for filtering high-temperature gases exhausted from garbage incinerators, coal-fired boilers, metal smelting furnaces and the like and used in filter bags formed by the filter cloth.
Description
Technical field:
The present invention relates to a kind of filtering material and uses thereof.
Background technology:
Along with improving constantly of Chinese society, 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 dust emission standard is 50mg/m
3Near or reach the standard of developed country.Particularly some provinces and cities have formulated strict emission control standards more according to the needs of self-growth, such as Beijing smoke dust discharge concentration are defined in 20mg/m
3Below.More and more Yan Ge country and provincial standard are had higher requirement to filtrate manufacturer, must develop a kind of novel filtrate for the limit value that reaches prescribed by standard and satisfy the demand in market.
Widely used filtrate mainly contains two kinds on the market now, and a kind of is needle punched filter material, and a kind of is coated filter material.Needle punched filter material mainly is to filter according to the principle of in-depth filtration, be dust because of hold back, inertial collision, static and diffusion etc. act on the needle punched filter material surface and form " first muffin layer ", after first muffin layer forms, the filtrate space is reduced, thereby effectively the dust interception is improved filter efficiency.But its shortcoming is a restive deashing pressure and make air pulse not destroy first muffin layer, thereby causes the dust exit concentration to change greatly; After long-time the use, dust is easily invaded the inner build-up of pressure of filtrate and is raise, and filtrate lost efficacy.Coated filter material such as publication number be the Chinese patent of CN1308559 disclosed a kind of laminate that has comprised PTFE woven fabric and PTFE film, mainly be to filter according to the principle of surface filtration, rely on the filtering material surface fully and capture dust, wherein inertial collision and interception effect play a leading role.Because the voidage of surface micropore film is very little, thereby has very high filter efficiency.Its shortcoming is that filtrate promptly lost efficacy and can not use once the film of filter material surface damages.Consider above two kinds of advantages that filtrate is had separately, therefore can develop a kind of novel filter material that on Nomex, carries out overlay film, this filtrate is all had an advantage of surface filtration and in-depth filtration, particularly under the situation that film damages, be unlikely to make filtrate to lose efficacy, but can carry out in-depth filtration, continue the performance filtration.
Summary of the invention:
The object of the present invention is to provide filtering material of a kind of high arresting efficiency and uses thereof.
Purpose of the present invention can realize by following method:
A kind of filtering material, its ground floor is a polytetrafluoroethylene film, the second layer is the fabric enhancement layer, the 3rd layer is fibrage, one deck median fiber layer is arranged between the ground floor and the second layer, this median fiber layer is because when the second layer and the 3rd layer of acupuncture complexing, and the fiber that part is the 3rd layer passes that fiber needle blood-letting puncture that the second layer forms is suitable to be crossed layer.
The thickness of polytetrafluoroethylene film is between 5～100 μ m.
The fiber of forming this fabric enhancement layer is a heat resistant fibre.
The 3rd layer of fibrage is the fleece that the heat resistant fibre of 5～200 μ m is formed by average diameter.
According to JIS L 1096 standards, the grammes per square metre of filtering material of the present invention is at 200～1000g/m
2Between, warp-wise and broadwise draw Zhang Qiangdu all more than 500N/5cm.
Polytetrafluoroethylene (PTFE) film and fabric enhancement layer are bonded together by hot adhesion.
With the bonding fabric enhancement layer surface of polytetrafluoroethylene film through the processing of singing.
The application of a kind of filtering material in preparation filter bag goods.
In the present invention, so-called fabric enhancement layer is meant a kind of sparse tissue layer that is formed by yarns interwoven, can make filtering material have certain mechanical strength by using the fabric enhancement layer.
Selected PTFE film thickness is between 5～100 μ m.The PTFE film preferably has 3～10cm under 125Pa
3/ cm
2Gas permeability between the/sec.The thickness of film is preferably between 10～80 μ m, more preferably between 25～60 μ m, more preferably between 35～50 μ m.
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, so long as it is just passable to have a stable on heating fiber, can use para-aramid fiber, meta-aromatic polyamide fiber, polyphenylene sulfide fibre (PPS), polyimide fiber, fluorine cellulose fiber, carbon fiber or glass fibre etc.But from the viewpoint of chemical proofing, hydrolytic resistance, the fiber of preferred PPS fiber and fluorine cellulose fiber.Consider from the mechanical strength aspect, most preferably the PPS fiber.The 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.In addition, though the mechanical strength of fluorine cellulose fiber is poorer than the PPS fiber, hear resistance and chemical proofing are good, when therefore in special rigorous environment, using, and preferred fluorine cellulose fiber.In order not increase the pressure loss as strainability, be 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 is meant between PTFE film and fibrage, works the fabric that strengthens mechanical forceful action by what heat resistant fibre constituted.
Fibrage is that the fleece multilayer stack that the heat resistant fibre of 5～200 μ m is formed forms by average diameter.When average fibre diameter during less than 5 μ m, the voidage of the filtering material made from this fibrid is low, and it is too fast that service pressure is risen, and filtrate lost efficacy reduced its service life.When average fibre diameter during greater than 200 μ m, the strainability of the filtering material made from this fibrid reduces can't reach discharge standard.As the fiber that forms above-mentioned filtering material, from obtaining the higher dust catching efficient and the lower pressure loss, the optimum fiber average diameter is at the heat resistant fibre of 20～100 μ m; More preferably average fibre diameter is at the heat resistant fibre of 20～60 μ m.Here the average diameter of fiber is meant the mean value by 50 measured fibre diameters of SEM.The employed heat resistant fibre of fibrage of the present invention can be para-aramid fiber, meta-aromatic polyamide fiber, PPS fiber, polyimide fiber or fluorine cellulose fiber.Wherein preferred PPS fiber by using the PPS fiber, can access the good filtering material of hear resistance, chemical proofing and hydrolytic resistance.
In the filtering material manufacturing process of the present invention,, can select for use to make short fiber become fibroreticulate conventional method by carding machine as making fibrolaminar method.The fleece that obtains with the method is extruded roller and is applied light compression by using after 3～4 layers of the lappings, form the state of lap after, utilize needle point method to make the mutual complexing of fiber make fibrage again at thickness direction.After stacking gradually enhancing fabric and fibrage fleece again, undertaken integrated by the acupuncture complexing again.In this process, because the acupuncture complexing forms the very thin fibrage of one deck on the surface that strengthens fabric.This fibrolaminar brute force that helps to improve filtering material on the one hand that forms has increased the interlacing point with the PTFE film on the other hand, has improved the coating performance of PTFE film and Nomex.At least a method in complexing method preferred pin acupuncture manipulation and the water spray perforation method, also available additive method.
With the acupuncture complexing integrated after, handle with the bonding fabric enhancement layer of the PTFE film surface one side mode of singing.The mode of singing can adopt the naked light of fuel oil to singe, and also can adopt electric energy to singe.When adopting naked light to singe, flame height is controlled at 7～8cm, when fabric is controlled at 100m/min in pace, fast by the flame district, thereby finishes the processing of singing; When electric energy was singed, heat-carrying pipe temperature was controlled at 800～900 ℃, fabric when pace is controlled at 100m/min and its wall carry out uniform CONTACT WITH FRICTION, thereby finish the processing of singing.
PTFE film and fabric enhancement layer are bonded together by hot adhesion.Hot adhesion is with enhancing fabric after singing and fibrolaminar complexing body, carries out high temperature hot pressing with the PTFE film under the high temperature more than 190 ℃.
Filtering material of the present invention is as the filtering material that is used for flue gas ash removal, and the requirement and the grammes per square metre (being weight per unit area) that must satisfy arresting efficiency will suit.The grammes per square metre large increase cost, the too little filter felt of grammes per square metre mechanical strength does not reach requirement, so grammes per square metre is at 200～1000g/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.
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 compressed air is to the impulsive force of filtering material during deashing, so the filtering material brute force is preferably more than 500N/5cm.
Fiber as constituting the fabric enhancement layer preferably uses staple yarn or bicomponent filament yarn.More preferably use staple yarn, staple yarn and fibroreticulate complexing are good, and fiber specific surface area increases, and are suitable on this aspect of dust catching efficient that improves filtering material therefore.
The filtering material that so makes is sewn into filter bag, is suitable as dedusting is carried out in exhausts such as the demanding incinerator of filter bag hear resistance, coal-burning boiler or Metal Melting furnace.Suture as using in making at this can be to use and fabric, the same material of filtering material, also can use makes with fabric, short fiber or long filament that the filtering material material is different but better.The fiber that preferably uses and constitute fabric is fit to use PPS fiber or fluorine cellulose fiber etc., preferred PPS or fluorine cellulose fiber similarly with the line with chemical proofing, stable on heating fibrous material formation.
Filter bag of the present invention is made of above-mentioned filtering material, and is better to the dust catching efficient in the exhaust, 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.Filtering material of the present invention in addition and filter bag are particularly suitable as filtration and use with filter cloth and by its filter bag that constitutes 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.
Have 1 among the figure, the PTFE film, 2, pass the median fiber layer of fabric enhancement layer, 3, the fabric enhancement layer, 4, fibrage.
The assay method of each rerum natura of filtering material is as follows:
[grammes per square metre]
Filtering material is cut into the square of 200 * 200mm, calculates the grammes per square metre (being weight per unit area) of filtering material according to weighing scale.
[thickness]
Used thickness amesdial (extruding force 0.000245Pa) is measured the thickness of filtering material. Select at random measure at 5, obtain mean value.
[Air permenbility]
Measure the Air permenbility of filtering material based on the Fu Leize type fabric breathability method of testing of JIS L 1096 regulations. Measuring the position is to select at random measure at 10.
[abrasivity]
Wearability based on the plane Cutter Method measuring filtering material of JIS L 1096 regulation. Select the sample of 5 pieces of Φ 11cm to test. Grinding number of times when the method for expressing of abrasion intensity is seen base cloth for grind activation from the fiber aspect.
[VDI3926 arresting efficiency]
Use is based on the performance of the experimental facilities mensuration filtering material of the standard of VDI3926, and the size of laboratory sample is φ 150mm, and the dust concentration of feeding is at 5g/m3, filtration velocity is 2m/min. The order of experiment is 5000 times+30 times (in the way)+stabilisations of 5000 times+30 times (in the way)+stabilisations of initial stage 30 times+stabilisation 5000 times+last 30 times. 30 times and last 30 times method are in the initial stage here 30 times, the way, 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 then next process, and this process is carried out 30 times altogether, record pressure and the variation of time in the process of experiment detect the dust concentration that is not filtered material capture simultaneously. Stabilization procedures refers to take 5s as the time interval filtering material be carried out deashing in the process of operation, 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, in 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 fiber plain cloth of 30/2.54cm of warp count, 14/2.54cm of weft count.With this fabric as base cloth, therein on face with 120g/m
2The stacked fleece of weight per unit area, this fleece is after being implemented opener, comb and parallel cotton fibers prior to spinning and handled by the PPS short fiber of fiber number 7.8 dtexs (average fibre diameter 27.2 μ m), coupe 51mm, with 50/cm of thorn pin density
2Carry out acupuncture and obtain, this fleece forms the fibrage of filtering material.To further by acupuncture processing fabric (base cloth) and above-mentioned fibrage be interweaved then, fibrolaminar fiber passes the suitable layer (being the median fiber layer) of crossing of tissue layer formation fiber needle blood-letting puncture and obtains grammes per square metre 240g/m
2, total 300/cm of needling density
2Nomex.Again to the processing of singing of its base cloth one side.Singe and handle the back under the high temperature more than 190 ℃, on the face of singing of Nomex, cover the PTFE film.In addition, see in the filtering material that obtains thus owing to the acupuncture processing shrinks, weight per unit area has than the tendency that uprises in theory.
With embodiment 1 described fabric as base cloth, therein on face with 120g/m
2The stacked fleece of weight per unit area, this fleece is after being implemented opener, comb and parallel cotton fibers prior to spinning and handled by the PPS short fiber of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm, with 50/cm of thorn pin density
2Carry out acupuncture and obtain, this fleece forms the fibrage of filtering material.To further by acupuncture processing fabric (base cloth) and above-mentioned fibrage be interweaved then, fibrolaminar fiber passes the suitable layer (being the median fiber layer) of crossing of tissue layer formation fiber needle blood-letting puncture and obtains grammes per square metre 240g/m
2, total 300/cm of needling density
2Nomex.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
With embodiment 1 described fabric as base cloth, therein on face with 280g/m
2The stacked fleece of weight per unit area, this fleece is after implementing opener, comb and parallel cotton fibers prior to spinning processing by the PPS short fiber of fiber number 7.8 dtexs (average fibre diameter 27.2 μ m), coupe 51mm (Dongli Ltd.'s system " Te Kang " S301-7.8T 51mm), with 50/cm of thorn pin density
2Carry out acupuncture and obtain, this fleece forms the fibrage of filtering material.To further by acupuncture processing fabric (base cloth) and above-mentioned fibrage be interweaved then, fibrolaminar fiber passes the suitable layer (being the median fiber layer) of crossing of tissue layer formation fiber needle blood-letting puncture and obtains grammes per square metre 400g/m
2, total 300/cm of needling density
2Nomex.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
With embodiment 1 described fabric as base cloth, therein on face with 280g/m
2The stacked fleece of weight per unit area, this fleece is after being implemented opener, comb and parallel cotton fibers prior to spinning and handled by the PPS short fiber of fiber number 2.2 dtexs (average fibre diameter 14.5 μ m), coupe 51mm, with 50/cm of thorn pin density
2Carry out acupuncture and obtain, this fleece forms the fibrage of filtering material.To further by acupuncture processing fabric (base cloth) and above-mentioned fibrage be interweaved then, fibrolaminar fiber passes the suitable layer (being the median fiber layer) of crossing of tissue layer formation fiber needle blood-letting puncture and obtains grammes per square metre 400g/m
2, total 300/cm of needling density
2Nomex.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Embodiment 5
With embodiment 1 described fabric as base cloth, therein on face with 480g/m
2The stacked fleece of weight per unit area, this fleece is after being implemented opener, comb and parallel cotton fibers prior to spinning and handled by the PPS short fiber of fiber number 7.8 dtexs (average fibre diameter 27.2 μ m), coupe 51mm, with 50/cm of thorn pin density
2Carry out acupuncture and obtain, this fleece forms the fibrage of filtering material.To further by acupuncture processing fabric (base cloth) and above-mentioned fibrage be interweaved then, fibrolaminar fiber passes the suitable layer (being the median fiber layer) of crossing of tissue layer formation fiber needle blood-letting puncture and obtains grammes per square metre 600g/m
2, total 300/cm of needling density
2Nomex.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
Embodiment 6
With embodiment 1 described fabric as base cloth, therein on face with 680g/m
2The stacked fleece of weight per unit area, this fleece is after being implemented opener, comb and parallel cotton fibers prior to spinning and handled by the PPS short fiber of fiber number 7.8 dtexs (average fibre diameter 27.2 μ m), coupe 51mm, with 50/cm of thorn pin density
2Carry out acupuncture and obtain, this fleece forms the fibrage of filtering material.To further by acupuncture processing fabric (base cloth) and above-mentioned fibrage be interweaved then, fibrolaminar fiber passes the suitable layer (being the median fiber layer) of crossing of tissue layer formation fiber needle blood-letting puncture and obtains grammes per square metre 800g/m
2, total 300/cm of needling density
2Nomex.Except that these, adopt and obtain filtering material with embodiment 1 identical method.
The filtering material that contains polyphenylene sulfide fibre that embodiment 1～6 obtains can be used to make filter bag.
Comparative example 1
With grammes per square metre 400g/m
2The PPS woven fabric be base cloth, under the high temperature more than 190 ℃, on this base cloth, cover the PTFE film, thereby obtain coated filter material.
Comparative example 2
With embodiment 1 described fabric as base cloth, therein on face with 480g/m
2The stacked fleece of weight per unit area, this fleece is after being implemented opener, comb and parallel cotton fibers prior to spinning and handled by the PPS short fiber of fiber number 7.8 dtexs (average fibre diameter 27.2 μ m), coupe 51mm, with 50/cm of thorn pin density
2Carry out acupuncture and obtain, this fleece forms the fibrage of filtering material.To further fabric (base cloth) and above-mentioned fibrage be interweaved then, obtain grammes per square metre 600g/m by acupuncture processing
2, total 300/cm of needling density
2The acupuncture filtering material.
From the evaluation result of table 1 as can be known, the filtering material of embodiment 1～6 is compared with the filtering material of comparative example 1,2, and that the arresting efficiency of filtering material is wanted is high, the pressure loss is less.Further, embodiment 3,4 is better more, and more further, embodiment 3 is best.The arresting efficiency height of filtering material, the pressure loss is also less.The mechanical strength of filtering material is also better simultaneously, and the little cost of fiber use amount is low, thereby is comparatively ideal filtering material.
Table one:
Claims (9)
1. filtering material, it is characterized in that: the ground floor of this filtering material is a polytetrafluoroethylene film, the second layer is the fabric enhancement layer, the 3rd layer is fibrage, one deck median fiber layer is arranged between the ground floor and the second layer, this median fiber layer is because when the second layer and the 3rd layer of acupuncture complexing, and the fiber that part is the 3rd layer passes that fiber needle blood-letting puncture that the second layer forms is suitable to be crossed layer.
2. filtering material according to claim 1 is characterized in that: the thickness of polytetrafluoroethylene film is between 5～100 μ m.
3. filtering material according to claim 1 is characterized in that: the fiber of forming this fabric enhancement layer is a heat resistant fibre.
4. filtering material according to claim 1 is characterized in that: the 3rd layer of fibrage is the fleece that the heat resistant fibre of 5～200 μ m is formed by average diameter.
5. filtering material according to claim 1 is characterized in that: according to JISL 1096 standards, the grammes per square metre of described filtering material is at 200～1000g/m
2Between.
6. filtering material according to claim 1 is characterized in that: according to JIS L 1096 standards, the warp-wise of described filtering material and broadwise draw Zhang Qiangdu all more than 500N/5cm.
7. filtering material according to claim 1 is characterized in that: polytetrafluoroethylene film and fabric enhancement layer are bonded together by hot adhesion.
8. filtering material according to claim 7 is characterized in that: with the bonding fabric enhancement layer surface of polytetrafluoroethylene film through the processing of singing.
9. the application of the described filtering material of claim 1 in preparation filter bag goods.
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| CN200810244409A CN101745270A (en) | 2008-12-01 | 2008-12-01 | Filter material and use thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810244409A CN101745270A (en) | 2008-12-01 | 2008-12-01 | Filter material and use thereof |
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|---|---|
| CN101745270A true CN101745270A (en) | 2010-06-23 |
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ID=42473265
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240483A (en) * | 2011-05-30 | 2011-11-16 | 浙江宇邦滤材科技有限公司 | Industrial filter material and manufacturing method thereof |
| CN102419304A (en) * | 2010-09-25 | 2012-04-18 | 北京牡丹联友电子工程有限公司 | Optical measuring probe system for high-humidity low-concentration flue gas pollutants |
| 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 |
| CN104083947A (en) * | 2014-07-28 | 2014-10-08 | 盐城宝赢滤材有限公司 | Modified polyester fiber needled felt filtration bag and preparation method thereof |
| CN107754449A (en) * | 2017-10-21 | 2018-03-06 | 浙江华基环保科技有限公司 | A kind of complex nonwoven filtering material and preparation method thereof |
| CN108348828A (en) * | 2015-10-29 | 2018-07-31 | 佩科平面美国公司 | The multilayer felt filter medium of heat bonding |
| CN109097853A (en) * | 2018-08-16 | 2018-12-28 | 安徽省汉甲机电设备科技有限公司 | A kind of preparation method of heatproof, high-intensitive bag-type dusting filter media fibre |
| CN110141900A (en) * | 2019-05-16 | 2019-08-20 | 苏州海蓝环保科技有限公司 | A kind of slag micropowder filtering filtrate and its production method |
| CN110202875A (en) * | 2019-07-09 | 2019-09-06 | 江苏瀚霆环保滤材有限公司 | A kind of blast furnace gas Nomex for steel production |
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| CN102419304A (en) * | 2010-09-25 | 2012-04-18 | 北京牡丹联友电子工程有限公司 | Optical measuring probe system for high-humidity low-concentration flue gas pollutants |
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| CN102240483A (en) * | 2011-05-30 | 2011-11-16 | 浙江宇邦滤材科技有限公司 | Industrial filter material and manufacturing method 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 |
| CN104083947A (en) * | 2014-07-28 | 2014-10-08 | 盐城宝赢滤材有限公司 | Modified polyester fiber needled felt filtration bag and preparation method thereof |
| CN108348828A (en) * | 2015-10-29 | 2018-07-31 | 佩科平面美国公司 | The multilayer felt filter medium of heat bonding |
| CN107754449A (en) * | 2017-10-21 | 2018-03-06 | 浙江华基环保科技有限公司 | A kind of complex nonwoven filtering material and preparation method thereof |
| CN109097853A (en) * | 2018-08-16 | 2018-12-28 | 安徽省汉甲机电设备科技有限公司 | A kind of preparation method of heatproof, high-intensitive bag-type dusting filter media fibre |
| CN109097853B (en) * | 2018-08-16 | 2019-07-05 | 安徽省华瑞网业有限公司 | A kind of preparation method of heatproof, high-intensitive bag-type dusting filter media fibre |
| CN110141900A (en) * | 2019-05-16 | 2019-08-20 | 苏州海蓝环保科技有限公司 | A kind of slag micropowder filtering filtrate and its production method |
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