CN107297103B - Dust filtering base material, preparation method and application thereof - Google Patents
Dust filtering base material, preparation method and application thereof Download PDFInfo
- Publication number
- CN107297103B CN107297103B CN201710628243.3A CN201710628243A CN107297103B CN 107297103 B CN107297103 B CN 107297103B CN 201710628243 A CN201710628243 A CN 201710628243A CN 107297103 B CN107297103 B CN 107297103B
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- denitration
- denitration catalyst
- catalyst
- aramid
- base material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
- D01D5/0084—Coating by electro-spinning, i.e. the electro-spun fibres are not removed from the collecting device but remain integral with it, e.g. coating of prostheses
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/4334—Polyamides
- D04H1/4342—Aromatic polyamides
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0631—Electro-spun
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a dust filtering base material and a preparation method thereof, wherein the base material is prepared by carrying out electrostatic spinning on a mixed solution of a denitration catalyst and aramid fiber, and the preparation method comprises the following steps of sequentially connecting: 1) preparing a denitration catalyst-aramid mixed solution: dissolving a denitration catalyst and aramid fiber mixture in N-N dimethylacetamide and uniformly stirring; 2) electrostatic spinning: carrying out electrostatic spinning on the denitration catalyst-aramid mixed solution obtained in the step 1), and receiving by adopting a filament plain woven fabric to obtain the dust filtering base material with the catalytic denitration function. The dust filtering base material with the catalytic denitration function is a fiber membrane material with high porosity and high specific surface area, which is prepared by utilizing an electrostatic spinning technology, a denitration catalyst is attached to the surface of a fiber, and the fiber does not completely coat the catalyst, so that the contact area between the catalyst and nitrogen oxide is increased, and the catalytic denitration efficiency is improved.
Description
Technical Field
The invention belongs to the field of electrostatic spinning, and particularly relates to a preparation method and application of a dust filtering base material.
Background
The functional industrial flue gas dedusting filter material is a new direction for the development of filter materials, and the dedusting filter material with the denitration function attracts the research of experts and scholars in various fields. The filter material with the denitration and dedusting functions is added with the denitration function on the basis of dedusting of conventional filter materials, so that residual nitrogen oxides in flue gas can be further removed, pollutant emission is reduced, excessive ammonia water generated by a front denitration device can be fully utilized, secondary pollution caused in the denitration process is effectively prevented, and great social benefits are achieved. At present, a few reports about denitration and dedusting filter materials exist, and preparation methods mainly include the following steps: the preparation method comprises the steps of loading a denitration catalyst on the surface of a fiber in a dipping and coating mode and then preparing the denitration catalyst into a filter material, adding catalyst powder into fiber master batches to prepare a fiber containing the catalyst, and adding the catalyst powder into polytetrafluoroethylene powder to prepare a polytetrafluoroethylene film containing the denitration catalyst. The above method has the following disadvantages: the catalyst is accumulated and gathered, only one layer of catalyst attached to the surface of the filter material is contacted with nitrogen oxides in the flue gas, and the catalytic denitration effect is very little, so that the existing denitration dedusting filter material is not applied well in engineering. Aramid fiber is a high-performance polymer, has excellent high-temperature resistance and chemical corrosion resistance, can fully meet the requirement of long-time use in the environment of an industrial flue gas dust remover, and is widely used in the field of industrial flue gas high-temperature filtration at present.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the problems of accumulation and aggregation of a catalyst and poor denitration effect in the background art, and provides a dust filtering substrate with a catalytic denitration function, and a preparation method and application thereof.
The invention provides a dust filtering base material which is prepared by carrying out electrostatic spinning on a denitration catalyst and aramid fiber mixed solution.
The preparation method comprises the following steps of:
1) preparing a denitration catalyst-aramid mixed solution: dissolving a denitration catalyst and aramid fiber mixture in N-N dimethylacetamide, uniformly stirring at the temperature of 100-110 ℃, and standing for 10-15 minutes after stirring to obtain a denitration catalyst-aramid fiber mixed solution with the concentration of 0.11-0.20 g/ml, wherein the denitration catalyst accounts for 10-35% of the mass of the denitration catalyst and aramid fiber mixture.
2) Electrostatic spinning: carrying out electrostatic spinning on the denitration catalyst-aramid mixed solution obtained in the step 1), and receiving by adopting a filament plain woven fabric to obtain the dust filtering base material with the catalytic denitration function.
In order to prepare the catalyst loading material with larger specific surface area and high porosity, the electrostatic spinning process parameters in the step 2) are adjusted as follows: the receiving distance is 10-20 cm, the voltage of a power plant is 25-35 KV, and the spinning speed is 0.5-1.0 ml/h.
The filament plain weave fabric is used as a reinforcement of the needle-punched non-woven fabric, has small damage in the needle-punching process, can be used as an electrostatic spinning micro-nano fiber membrane material of the reinforcement, and is a polyphenylene sulfide filament plain weave base fabric, an aramid filament plain weave base fabric or a glass fiber filament plain weave base fabric for preparing a catalyst load material with proper specific surface area and porosity.
The invention also provides application of the dust filtering base material in dust removal and denitration of industrial flue gas.
Has the advantages that: the dust filtering substrate is a fiber membrane material with high porosity and high specific surface area, which is prepared by utilizing an electrostatic spinning technology, a denitration catalyst is attached to the surface of the fiber, and the fiber does not completely coat the catalyst, so that the contact area between the catalyst and nitrogen oxide is increased, and the catalytic denitration efficiency is improved.
Drawings
FIG. 1 is a scanning electron micrograph of a dust filter substrate prepared in example 1; the diameter of the fiber is 150nm, the particle size of the catalyst particles is 550nm, the fiber does not completely coat the catalyst, and the catalyst particles can fully contact with nitrogen oxides in the flue gas, so that higher catalytic efficiency is achieved.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Example 1
Weighing 0.15g of manganese cerium titanium denitration catalyst and 1.35g of aramid fiber, and dissolving the manganese cerium titanium denitration catalyst and the aramid fiber in 10ml of N-N dimethylacetamide solution to obtain a denitration catalyst-aramid fiber mixed solution with the mass-volume ratio concentration of 15% (m/V), wherein the mass ratio of the denitration catalyst to the aramid fiber is 10: and 90, stirring the solution at 105 ℃ until the solution is completely dissolved, standing for 10min, and then carrying out electrostatic spinning. Electrostatic spinning parameters: the electric field voltage is 25KV, the receiving distance is 15cm, the spinning speed is 0.6ml/h, the composite fiber membrane material, namely the dust filtering base material with the catalytic denitration function, is finally obtained after the polyphenylene sulfide filament plain weave fabric is used for receiving, and the catalytic denitration efficiency can reach more than 35%.
Example 2
Weighing 0.3g of vanadium-titanium denitration catalyst and 1.2g of aramid fiber, dissolving in 10ml of N-N dimethylacetamide solution to obtain a nitric oxide removal denitration catalyst-aramid fiber mixed solution with the mass-volume ratio concentration of 15% (m/V), wherein the mass ratio of the denitration catalyst to the aramid fiber is 20: 80, stirring the solution at 103 ℃ until the solution is completely dissolved, standing for 20min, and then carrying out electrostatic spinning. Electrostatic spinning parameters: the electric field voltage is 22KV, the receiving distance is 16cm, the spinning speed is 0.5ml/h, the aramid filament plain weave fabric is used for receiving, and finally the composite fiber membrane material, namely the dust filtering base material with the catalytic denitration function is obtained, and the catalytic denitration efficiency can reach more than 35%.
Example 3
Weighing 0.48g of manganese cerium titanium denitration catalyst and 1.12g of aramid fiber, and dissolving the manganese cerium titanium denitration catalyst and the aramid fiber in 10ml of N-N dimethylacetamide solution to obtain a denitration catalyst-aramid fiber mixed solution with the mass-volume ratio concentration of 15% (m/V), wherein the mass ratio of the denitration catalyst to the aramid fiber is 30: and 70, stirring the solution at 100 ℃ until the solution is completely dissolved, standing for 15min, and then carrying out electrostatic spinning. Electrostatic spinning parameters: the electric field voltage is 20KV, the receiving distance is 12cm, the spinning speed is 0.7ml/h, the plain woven fabric of the glass fiber filaments is used for receiving, and finally the composite fiber membrane material, namely the dust filtering base material with the catalytic denitration function is obtained, and the catalytic denitration efficiency can reach 50%.
Application example
The composite fiber membrane material prepared by the method in the examples 1-3 has a large specific surface area, high porosity and certain catalytic denitration efficiency, and the catalytic denitration efficiency can reach 50% at 150-200 ℃, so that the composite fiber membrane material can be used as a material for industrial flue gas denitration and dust removal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. The dust filtering base material is characterized by being prepared by carrying out electrostatic spinning on a denitration catalyst and aramid fiber mixed solution;
the dust filtering substrate is prepared by the following sequential steps:
1) preparing a denitration catalyst-aramid mixed solution: dissolving a denitration catalyst and aramid fiber mixture in N-N dimethylacetamide and uniformly stirring to obtain a denitration catalyst-aramid fiber mixed solution with the concentration of 0.11-0.20 g/ml, wherein the denitration catalyst accounts for 10-35% of the mass of the denitration catalyst and aramid fiber mixture;
2) electrostatic spinning: carrying out electrostatic spinning on the denitration catalyst-aramid mixed solution obtained in the step 1), and receiving by adopting a filament plain woven fabric to obtain the dust filtering base material with the catalytic denitration function.
2. The dust filter substrate according to claim 1, wherein the electrospinning process parameters in step 2) are: the receiving distance is 10-20 cm, the voltage of a power plant is 25-35 KV, and the spinning speed is 0.5-1.0 ml/h.
3. The dust filter substrate according to claim 1, wherein the mixture in the step 1) is stirred at a temperature of 100 ℃ to 110 ℃ and then allowed to stand for 10 to 15 minutes after stirring.
4. The dust filter substrate of claim 1, wherein the filament scrim is a polyphenylene sulfide filament scrim, an aramid filament scrim, or a fiberglass filament scrim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710628243.3A CN107297103B (en) | 2017-07-28 | 2017-07-28 | Dust filtering base material, preparation method and application thereof |
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|---|---|---|---|
| CN201710628243.3A CN107297103B (en) | 2017-07-28 | 2017-07-28 | Dust filtering base material, preparation method and application thereof |
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| CN107297103A CN107297103A (en) | 2017-10-27 |
| CN107297103B true CN107297103B (en) | 2020-05-15 |
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| CN107815791A (en) * | 2017-11-16 | 2018-03-20 | 东华大学 | A kind of preparation method of the composite nano fiber non-woven fabrics of supported catalyst |
| CN113041862A (en) * | 2021-04-02 | 2021-06-29 | 上海洁晟环保科技有限公司 | Composite membrane material, preparation method thereof, filtering membrane and storage device |
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| CN103806221B (en) * | 2014-02-24 | 2016-05-04 | 东华大学 | A kind of preparation method of multicomponent mesh nano tunica fibrosa |
| CN106914064B (en) * | 2015-12-28 | 2019-09-06 | 厦门三维丝环保股份有限公司 | A kind of ultra-clean filtering has both the fire resistant filter material and preparation method thereof of low-temperature catalyzed denitration |
| CN105603585B (en) * | 2016-02-05 | 2017-10-27 | 扬州大学 | A kind of preparation method of the controllable hollow carbon fiber of yardstick |
| CN106111209B (en) * | 2016-06-17 | 2019-04-26 | 江苏纳佰成纳米科技有限公司 | The preparation method of tail gas denitration sub-micron fibers material |
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