WO2018233159A1 - Difunctional composite filter medium fiber and preparation method therefor - Google Patents
Difunctional composite filter medium fiber and preparation method therefor Download PDFInfo
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- WO2018233159A1 WO2018233159A1 PCT/CN2017/106879 CN2017106879W WO2018233159A1 WO 2018233159 A1 WO2018233159 A1 WO 2018233159A1 CN 2017106879 W CN2017106879 W CN 2017106879W WO 2018233159 A1 WO2018233159 A1 WO 2018233159A1
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- 239000000835 fiber Substances 0.000 title claims abstract description 207
- 239000002131 composite material Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000012670 alkaline solution Substances 0.000 claims abstract description 26
- 239000012266 salt solution Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000004913 activation Effects 0.000 claims abstract description 7
- 230000032683 aging Effects 0.000 claims abstract description 7
- 150000002696 manganese Chemical class 0.000 claims abstract description 5
- 150000003754 zirconium Chemical class 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 89
- 230000001588 bifunctional effect Effects 0.000 claims description 47
- 230000008595 infiltration Effects 0.000 claims description 30
- 238000001764 infiltration Methods 0.000 claims description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000000428 dust Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 10
- 239000001099 ammonium carbonate Substances 0.000 claims description 10
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 10
- 238000007654 immersion Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- -1 zirconium ions Chemical class 0.000 claims description 10
- 229910052726 zirconium Inorganic materials 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 8
- 229910001437 manganese ion Inorganic materials 0.000 claims description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 159000000008 strontium salts Chemical class 0.000 claims description 3
- 229910001427 strontium ion Inorganic materials 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 abstract description 7
- 238000002604 ultrasonography Methods 0.000 abstract description 3
- 238000009736 wetting Methods 0.000 abstract 4
- 230000008021 deposition Effects 0.000 abstract 3
- 150000000703 Cerium Chemical class 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 description 36
- 150000004706 metal oxides Chemical class 0.000 description 36
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 22
- WXKDNDQLOWPOBY-UHFFFAOYSA-N zirconium(4+);tetranitrate;pentahydrate Chemical compound O.O.O.O.O.[Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O WXKDNDQLOWPOBY-UHFFFAOYSA-N 0.000 description 21
- 239000004642 Polyimide Substances 0.000 description 20
- 229920001721 polyimide Polymers 0.000 description 20
- 239000004810 polytetrafluoroethylene Substances 0.000 description 18
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 18
- 239000008367 deionised water Substances 0.000 description 17
- 229910021641 deionized water Inorganic materials 0.000 description 17
- QQZMWMKOWKGPQY-UHFFFAOYSA-N cerium(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O QQZMWMKOWKGPQY-UHFFFAOYSA-N 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- 229910021645 metal ion Inorganic materials 0.000 description 10
- 229910052684 Cerium Inorganic materials 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 230000003197 catalytic effect Effects 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000012456 homogeneous solution Substances 0.000 description 4
- GJKFIJKSBFYMQK-UHFFFAOYSA-N lanthanum(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GJKFIJKSBFYMQK-UHFFFAOYSA-N 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 241000143437 Aciculosporium take Species 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- BQPMXCYIQRRYMJ-UHFFFAOYSA-N bismuth;trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Bi+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O BQPMXCYIQRRYMJ-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000002525 ultrasonication Methods 0.000 description 2
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 description 2
- GBNDTYKAOXLLID-UHFFFAOYSA-N zirconium(4+) ion Chemical compound [Zr+4] GBNDTYKAOXLLID-UHFFFAOYSA-N 0.000 description 2
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- VGBWDOLBWVJTRZ-UHFFFAOYSA-K cerium(3+);triacetate Chemical compound [Ce+3].CC([O-])=O.CC([O-])=O.CC([O-])=O VGBWDOLBWVJTRZ-UHFFFAOYSA-K 0.000 description 1
- OZECDDHOAMNMQI-UHFFFAOYSA-H cerium(3+);trisulfate Chemical compound [Ce+3].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OZECDDHOAMNMQI-UHFFFAOYSA-H 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229940071125 manganese acetate Drugs 0.000 description 1
- 229940099596 manganese sulfate Drugs 0.000 description 1
- 239000011702 manganese sulphate Substances 0.000 description 1
- 235000007079 manganese sulphate Nutrition 0.000 description 1
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- ONSSQRPDFOMBGE-UHFFFAOYSA-N strontium dinitrate hexahydrate Chemical compound O.O.O.O.O.O.[N+](=O)([O-])[O-].[Sr+2].[N+](=O)([O-])[O-] ONSSQRPDFOMBGE-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- QBAZWXKSCUESGU-UHFFFAOYSA-N yttrium(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Y+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O QBAZWXKSCUESGU-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- ZXAUZSQITFJWPS-UHFFFAOYSA-J zirconium(4+);disulfate Chemical compound [Zr+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZXAUZSQITFJWPS-UHFFFAOYSA-J 0.000 description 1
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
-
- 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
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
-
- B01J35/58—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/12—Oxidising
- B01J37/14—Oxidising with gases containing free oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
Definitions
- the invention relates to the field of post-treatment of pollutant dust and nitrogen oxides in coal-fired power plants and cement, glass, ceramics and other building materials industries, and particularly relates to a dust-denitration dual-function composite filter fiber used in a bag/electric bag dust collector and Preparation.
- Nitrogen oxides can endanger human health while causing damage to the ecological environment. It is an extremely harmful air pollutant. Among them, coal-fired boilers in the power, building materials and other industries are important sources of nitrogen oxide emissions. Selective Catalytic Reduction (SCR) is the most widely used and most mature coal-fired boiler denitration technology. It has many advantages such as high denitration efficiency, stable and reliable operation, good selectivity, etc., and its occupancy rate in practical applications is reached. More than 90. NH 3 is the most commonly used reducing agent in SCR technology. The technical characteristics of SCR determine that there will be inevitable NH3, ie ammonia escaping, in the denitration equipment outlet.
- SCR Selective Catalytic Reduction
- the escaping NH 3 easily reacts with the tail flue to form a highly viscous ammonium sulfate/ammonium hydrogen sulfate, causing corrosion and clogging of the tail flue.
- the device baghouse again denitrification SCR catalyst materials, at a suitable temperature window to achieve NH 3 slip further reaction of NO x and unreduced, it is expected to escape while the effective treatment of NH 3, to further improve the System denitration efficiency.
- bag-type dust collectors In the field of coal-fired flue gas after-treatment, bag-type dust collectors have more and more applications at home and abroad due to their high dust removal efficiency, low secondary pollution and easy recycling of dry materials, accounting for 80% of the dust removal equipment used in the market. .
- the bag filter has a huge demand for dust filter media, especially the multifunctional composite fiber has broad market prospects.
- China has put forward higher requirements for coal-fired boilers in various industries.
- Coal-fired boilers in the steel, cement, glass, ceramics and other industries are the main sources of air pollution, and are also the focus of governance.
- China's annual output of steel exceeds 900 million tons, according to Baosteel bags.
- Bag-type dust collectors are often arranged behind the SCR device.
- the operating temperature window is often between 150 and 250 °C, which is similar to the common low-temperature SCR technology application window.
- the high efficiency coupling between the catalytic material and the dust filter media will effectively solve the above-mentioned ammonia slip problem and greatly improve the system denitration efficiency.
- the composite filter material is prepared by the direct impregnation method of active oxide species.
- the direct impregnation method is used to couple oxides of Mn, Ce, Zr and the like with fibers.
- the fiber filter material has an active component and the fiber is not firmly bonded, and is easy to be pulverized and fallen off, and industrial production is difficult.
- one of the objects of the present invention is to provide a method for preparing a bifunctional composite filter fiber, which can firmly bond an oxide of Mn, Ce, and Zr to a fiber, and is woven from the fiber. while the bifunctional complex filter trapping particulate matter may be implemented removal from flue gas NO x.
- the alkali solution is first impregnated into the fiber, and the fiber is sufficiently compounded with the basic substance by ultrasonication, and then immersed in the salt solution B containing manganese ions, cerium ions and zirconium ions, the manganese ion, the cerium ion and the zirconium ion are made.
- the salt solution B containing manganese ions, cerium ions and zirconium ions, the manganese ion, the cerium ion and the zirconium ion are made.
- Precipitating on the surface of the fiber so that the metal atom and the fiber form a strong interaction, ensuring that the active metal oxide can be stably bonded to the surface of the fiber, not easy to fall off, and at the same time, the active metal oxide can be uniformly dispersed on the surface of the fiber, and the catalytic performance of the fiber is enhanced. .
- the ultrasonic ion can make the metal ion enter the gap of the fiber better, so that the metal ion can be more uniformly dispersed on the fiber, and then the fiber impregnated with the metal ion is impregnated.
- a uniformly dispersed active metal oxide can be obtained on the fiber, and the metal ions which are first impregnated enter the fiber gap, and the metal ions are precipitated, thereby not only strengthening the active metal oxide on the fiber.
- the bonding strength and the more active dispersion of the active metal oxide on the fibers further enhance the catalytic performance of the fibers.
- the fiber is a macromolecular organic substance which is easily degraded and dissolved under alkaline conditions, thereby impairing the structure of the fiber, and finally the composite filter fiber cannot be obtained.
- the invention adjusts the pH of the alkaline solution A to 8-12 by a large number of experiments, and controls the infiltration or immersion time of the fiber in the alkaline solution, thereby ensuring that the fiber does not cause irreversible structural damage in the alkaline solution A, thereby finally obtaining A bifunctional composite filter fiber with a strong load of the active component.
- Another object of the present invention is to provide a composite filter fiber prepared by the above preparation method. Filter prepared from the fiber It can remove dust and catalyze denitrification.
- a third object of the present invention is to provide a filter material having the above composite filter fiber preparation.
- a fourth object of the present invention is to provide an application of the above composite filter fiber or filter material in dust removal and denitrification.
- the invention adopts a novel pre-coating precipitation process to realize the firm loading of manganese, cerium and zirconium oxide on the surface of various organic fibers.
- the metal atom forms a strong interaction with the fiber, and the finally formed oxide It has uniform dispersion, is not easy to fall off and has stable denitration efficiency.
- the process is simple and the cost is low, which is beneficial to the rapid production of filter material production enterprises.
- the application of the dual-function composite filter fiber obtained by the invention can realize the integration of the dust removal and denitration process, solve the problem of ammonia escape, and greatly improve the denitration efficiency of the system, and promote the coal-fired boiler of a new round of steel, building materials and other industries. Flue gas remediation has a positive effect and has broad application prospects.
- Example 1 is a topographical view of a polyimide fiber used in Example 1;
- Fig. 2 is a view showing the topographical characteristics of the polyimide fiber after the treatment of Example 1.
- the manganese salt described in the present invention is a water-soluble compound having a cation of manganese ions, such as manganese nitrate, manganese sulfate, manganese acetate or the like.
- the onium salt described in the present invention is a water-soluble compound having a cation of cerium ions, such as cerium nitrate, cerium sulfate, cerium acetate or the like.
- the zirconium salt described in the present invention is a water-soluble compound having a cation of zirconium ions, such as zirconium nitrate, zirconium sulfate or the like.
- the present application proposes a bifunctional composite filter fiber. Preparation side law.
- An exemplary embodiment of the present application provides a method for preparing a bifunctional composite filter fiber.
- the alkali solution is first impregnated into the fiber, and the fiber is sufficiently compounded with the basic substance by ultrasonication, and then immersed in the salt solution B containing manganese ions, cerium ions and zirconium ions, the manganese ion, the cerium ion and the zirconium ion are made.
- the salt solution B containing manganese ions, cerium ions and zirconium ions, the manganese ion, the cerium ion and the zirconium ion are made.
- Precipitating on the surface of the fiber so that the metal atom and the fiber form a strong interaction, ensuring that the active metal oxide can be stably bonded to the surface of the fiber, not easy to fall off, and at the same time, the active metal oxide can be uniformly dispersed on the surface of the fiber, and the catalytic performance of the fiber is enhanced. .
- the ultrasonic ion can make the metal ion enter the gap of the fiber better, so that the metal ion can be more uniformly dispersed on the fiber, and then the fiber impregnated with the metal ion is impregnated.
- a uniformly dispersed active metal oxide can be obtained on the fiber, and the metal ions which are first impregnated enter the fiber gap, and the metal ions are precipitated, thereby not only strengthening the active metal oxide on the fiber.
- the bonding strength and the more active dispersion of the active metal oxide on the fibers further enhance the catalytic performance of the fibers.
- the fiber is a macromolecular organic substance which is easily degraded and dissolved under alkaline conditions, thereby impairing the structure of the fiber, and finally the composite filter fiber cannot be obtained.
- the invention adjusts the pH of the alkaline solution A to 8-12 by a large number of experiments, and controls the infiltration or immersion time of the fiber in the alkaline solution, thereby ensuring that the fiber does not cause irreversible structural damage in the alkaline solution A, thereby finally obtaining A bifunctional composite filter fiber with a strong load of the active component.
- the alkaline solution A is ammonia water, sodium hydroxide solution, ammonium carbonate solution or sodium carbonate solution.
- the molar ratio of manganese ions, strontium ions and zirconium ions in the salt solution B is from 1 to 8:1 to 4:1 to 4.
- the time of ultrasound-assisted infiltration is 5 to 30 min.
- the ultrasonic assisted infiltration time is less than the infiltration time of the fiber immersed in the alkaline solution A; when the salt solution B is used to infiltrate the fiber, the ultrasonic assisted infiltration time is less than the fiber immersion into the salt solution B Infiltration time.
- the time of the immersion precipitation is 30 to 80 min; when the fiber is infiltrated with the salt solution B, the infiltration time is 30 to 80 min.
- the aging time is 2-6 hours.
- the aging is carried out by immersing the precipitated fibers and aging them in an air atmosphere.
- the microwave heat treatment time is 10 to 40 minutes
- the microwave power is 100-600 W
- the microwave generation time is 75-225 s per 300 s.
- the microwave heat treatment is followed by drying and then activation.
- the drying condition is drying at 105 ° C for 5 h.
- the activation treatment is to place the fibers at a temperature of from 150 to 250 °C for a period of time.
- the activation treatment time is 2 to 8 hours.
- the present application also provides a composite filter fiber prepared by the above preparation method.
- the filter material prepared from the fiber can both remove dust and catalyze denitrification.
- the present application also provides a filter material prepared from the above composite filter media.
- the application also provides the use of the above composite filter fiber or filter material in dust removal and denitrification.
- the bifunctional composite filter fiber based on polyimide fiber has a morphology as shown in Figure 1.
- the steps are as follows:
- Step 1 Take 16 mL of a 25 wt% aqueous ammonia solution, dilute to 200 mL with deionized water, and stir to obtain a solution A (pH 10). Weighed 14.32 g of a 50 wt% manganese nitrate solution, 4.34 g of cerium nitrate hexahydrate, and 4.29 g of zirconium nitrate pentahydrate in 250 mL of deionized water, and stirred uniformly to obtain a solution B.
- Step 2 The polyimide fiber was immersed in the A solution for 21 min, and the ultrasonic assist time was 7 min. Then, the infiltrated polyimide fiber was taken out from the solution A, drained, and then immersed in the solution B, and the fiber was taken out after being immersed for 40 minutes. The air atmosphere aged for 4 hours.
- Step 3 The aged fiber is placed in a microwave reactor, microwave heat treatment for 20 min, and the reaction conditions are: microwave power 200 W, microwave generation time every 20 s for 10 s; then placed in a blast drying oven at 105 ° C for 5 h.
- the dried polyimide fiber was placed in a muffle furnace and heat-treated at 250 ° C for 4 h to obtain a bifunctional composite fiber #1 with a firm supported metal oxide.
- the morphology is shown in FIG. 2 .
- This embodiment is the same as the first embodiment except that in this embodiment, 50% by weight of a manganese nitrate solution is 3.58 g, yttrium nitrate hexahydrate is 17.36 g, and zirconium nitrate pentahydrate is 4.29 g, and a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #2.
- This example is the same as the first embodiment except that in this embodiment, 50% by weight of a manganese nitrate solution is 3.58 g, cerium nitrate hexahydrate is 4.34 g, and zirconium nitrate pentahydrate is 17.16 g, and a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #3.
- the bifunctional composite filter fiber based on PTFE fiber is as follows:
- Step 1 Take 16 mL of 25 wt% aqueous ammonia solution, dilute to 200 mL with deionized water, and stir to obtain solution A (pH 11). Weighed 14.32 g of a 50 wt% manganese nitrate solution, 4.34 g of cerium nitrate hexahydrate, and 4.29 g of zirconium nitrate pentahydrate in 250 mL of deionized water, and stirred uniformly to obtain a solution B.
- Step 2 The PTFE fiber was immersed in the A solution for 15 min, and the ultrasonic assisted time was 7 min. Then, the infiltrated PTFE fiber was taken out from the solution A, drained, and then immersed in the solution B. After impregnation for 30 min, the fiber was taken out and placed in an air atmosphere for 4 hours.
- Step 3 The aged fiber is placed in a microwave reactor, microwave heat treatment for 20 min, and the reaction conditions are: microwave power 200 W, microwave generation time every 20 s for 10 s; then placed in a blast drying oven at 105 ° C for 5 h.
- the dried PTFE fiber was placed in a muffle furnace and heat-treated at 250 ° C for 4 h to obtain a bifunctional composite fiber #4 which was firmly supported with a metal oxide.
- This embodiment is the same as the embodiment 4 except that in this embodiment, a 50 wt% manganese nitrate solution is 3.58 g, a lanthanum nitrate hexahydrate 17.36 g, and a zirconium nitrate pentahydrate 4.29 g, and a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #5.
- This embodiment is the same as the embodiment 4 except that in this embodiment, 50 wt% of a manganese nitrate solution is 3.58 g, bismuth nitrate hexahydrate is 4.34 g, and zirconium nitrate pentahydrate is 17.16 g, and a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #6.
- the bifunctional composite filter fiber based on PTFE fiber is as follows:
- Step 1 Weigh 16g of sodium hydroxide, dissolve it in deionized water and dilute to 200mL, stir until the sodium hydroxide solid is completely dissolved, and obtain a homogeneous solution A (pH 12). Weighed 14.32 g of 50 wt% manganese nitrate solution, 17.36 g of cerium nitrate hexahydrate, and 4.29 g of zirconium nitrate pentahydrate dissolved in 250 mL of deionized water, and stirred uniformly to obtain a solution B.
- Step 2 The PTFE fiber was immersed in the A solution for 15 min, and the ultrasonic assisted time was 7 min. Then, the infiltrated PTFE fiber was taken out from the solution A, drained, and then immersed in the solution B. After impregnation for 50 min, the fiber was taken out and placed in an air atmosphere for 4 hours.
- Step 3 The aged fiber is placed in a microwave reactor, microwave heat treatment for 20 min, reaction conditions: microwave power 400 W, microwave generation time every 30 s for 10 s; then placed in a blast drying oven at 105 ° C for 5 h.
- the dried PTFE fiber was placed in a muffle furnace and heat-treated at 250 ° C for 4 h to obtain a bifunctional composite fiber #7 which was firmly supported with metal oxide.
- This embodiment is the same as the embodiment 4 except that in this embodiment, a 50 wt% manganese nitrate solution is 3.58 g, a lanthanum nitrate hexahydrate 17.36 g, and a zirconium nitrate pentahydrate 17.16 g, and a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #8.
- This embodiment is the same as the embodiment 4 except that in this embodiment, a 50 wt% manganese nitrate solution of 14.32 g, a cerium nitrate hexahydrate of 4.34 g, and a zirconium nitrate pentahydrate of 17.16 g, a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #9.
- the bifunctional composite filter fiber based on polyimide fiber is as follows:
- Step 1 Weigh 19.2g of ammonium carbonate, dissolve it in deionized water and dilute to 200mL, stir until the ammonium carbonate solid is completely dissolved, and obtain a homogeneous solution A (pH 9). 3.58 g of a 50 wt% manganese nitrate solution, 4.34 g of cerium nitrate hexahydrate, and 4.29 g of zirconium nitrate pentahydrate were weighed and dissolved in 250 mL of deionized water, and stirred uniformly to obtain a solution B.
- Step 2 The polyimide fiber was immersed in the A solution for 50 min, and the ultrasonic assist time was 20 min. Then, the infiltrated polyimide fiber was taken out from the solution A, drained, and then immersed in the solution B, and the fiber was taken out after the immersion precipitation for 60 minutes. The air atmosphere aged for 4 hours.
- Step 3 The aged fiber is placed in a microwave reactor, microwave heat treatment for 20 min, and the reaction conditions are: microwave power 300 W, microwave generation time every 30 s for 10 s; then placed in a blast drying oven at 105 ° C for 5 h.
- the dried PTFE fiber was placed in a muffle furnace and heat-treated at 250 ° C for 4 h to obtain a bifunctional composite fiber #10 which was firmly supported with metal oxide.
- This embodiment is the same as the embodiment 10 except that the infiltration time of the fiber in the A solution is 30 min, and the infiltration time in the B solution is 80 min, and the bifunctional composite fiber which is firmly loaded with the metal oxide is obtained. 11.
- This embodiment is the same as the embodiment 10 except that the infiltration time of the fiber in the A solution is changed to 40 min, and the infiltration time in the B solution is changed to 60 min to obtain a bifunctional composite of the solid supported metal oxide. Fiber #12.
- This embodiment is the same as that of the embodiment 10 except that 19.2 g of ammonium carbonate in the first step is changed to 21.2 g of sodium carbonate to obtain a bifunctional composite fiber #13 which is firmly supported with metal oxide.
- the 13 catalyst samples were tested for SCR denitration activity in a laboratory fixed-bed denitration reactor.
- the denitration reaction was tested at a reaction temperature of 125-250 ° C, a space velocity of 30 000 h -1 , a NH 3 concentration of 500 ppm, and a NO concentration of 500 ppm.
- the O 2 concentration was 3.5%, and N 2 was a balance gas.
- Table 1 The results are shown in Table 1.
- a sodium hydroxide solution having a pH of 13 was prepared as the solution A, and the polyimide fiber was immersed in the A solution for 50 minutes, and the ultrasonic assist time was 20 minutes. The polyimide fiber was dissolved and could not be used.
- This comparative example was the same as in Example 1, except that an ammonium carbonate solution having a pH of 7.5 was prepared as the solution A, and the fibers prepared by the comparative examples did not have catalytic denitration properties.
- the bifunctional composite filter fiber based on polyimide fiber is as follows:
- Step 1 Weigh out 14.32 g of a 50 wt% manganese nitrate solution, 4.34 g of cerium nitrate hexahydrate, and 4.29 g of zirconium nitrate pentahydrate in 250 mL of deionized water, and stir uniformly to obtain a solution A. Take 16 mL of a 25 wt% aqueous ammonia solution, dilute to 200 mL with deionized water, and stir to obtain a solution B (pH 10).
- Step 2 The polyimide fiber was immersed in the A solution for 40 min, and the ultrasonic assisted time was 7 min. Then, the infiltrated polyimide fiber was taken out from the solution A, drained, and then immersed in the solution B, and the fiber was taken out after being immersed for 21 minutes. The air atmosphere aged for 4 hours.
- Step 3 The aged fiber is placed in a microwave reactor, microwave heat treatment for 20 min, and the reaction conditions are: microwave power 200 W, microwave generation time every 20 s for 10 s; then placed in a blast drying oven at 105 ° C for 5 h.
- the dried polyimide fiber was placed in a muffle furnace and heat-treated at 250 ° C for 4 h to obtain a bifunctional composite fiber #14 which was firmly supported with metal oxide.
- This embodiment is the same as the embodiment 14, except that in this embodiment, a 50 wt% manganese nitrate solution is 3.58 g, a lanthanum nitrate hexahydrate 17.36 g, and a zirconium nitrate pentahydrate 4.29 g, and a bifunctional composite of a strongly supported metal oxide is obtained.
- This embodiment is the same as the embodiment 14, except that in this embodiment, 50% by weight of a manganese nitrate solution is 3.58 g, bismuth nitrate hexahydrate is 4.34 g, and zirconium nitrate pentahydrate is 17.16 g, and a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #16.
- the bifunctional composite filter fiber based on PTFE fiber is as follows:
- Step 1 Weigh out 14.32 g of a 50 wt% manganese nitrate solution, 4.34 g of cerium nitrate hexahydrate, and 4.29 g of zirconium nitrate pentahydrate in 250 mL of deionized water, and stir uniformly to obtain a solution A. Take 16 mL of a 25 wt% aqueous ammonia solution, dilute to 200 mL with deionized water, and stir to obtain a solution B (pH 11).
- Step 2 The PTFE fiber was immersed in the A solution for 30 min, and the ultrasonic assisted time was 7 min. Then, the infiltrated PTFE fiber was taken out from the solution A, drained, and then immersed in the solution B. After immersing the precipitate for 15 minutes, the fiber was taken out and aged in an air atmosphere for 4 hours.
- Step 3 The aged fiber is placed in a microwave reactor, microwave heat treatment for 20 min, and the reaction conditions are: microwave power 200 W, microwave generation time every 20 s for 10 s; then placed in a blast drying oven at 105 ° C for 5 h.
- the dried PTFE fiber was placed in a muffle furnace and heat-treated at 250 ° C for 4 h to obtain a bifunctional composite fiber #17 which was firmly supported with a metal oxide.
- Example 17 This example is the same as Example 17, except that in this embodiment, 50% by weight of manganese nitrate solution is 3.58 g, strontium nitrate hexahydrate is 17.36 g, and zirconium nitrate pentahydrate is 4.29 g, and a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #18.
- Example 17 This example is the same as Example 17, except that in this embodiment, 50% by weight of manganese nitrate solution is 3.58 g, cerium nitrate hexahydrate is 4.34 g, and zirconium nitrate pentahydrate is 17.16 g, and a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #19.
- the bifunctional composite filter fiber based on PTFE fiber is as follows:
- Step 1 Weigh 14.32g of 50wt% manganese nitrate solution, 17.36g of cerium nitrate hexahydrate, 4.29g of zirconium nitrate pentahydrate Dissolved in 250 mL of deionized water and stirred well to obtain solution A. 16 g of sodium hydroxide was weighed, dissolved in deionized water and made up to 200 mL, and stirred until the sodium hydroxide solid was completely dissolved to obtain a homogeneous solution B (pH 12).
- Step 2 The PTFE fiber was immersed in the A solution for 50 min, and the ultrasonic assisted time was 7 min. Then, the infiltrated PTFE fiber was taken out from the solution A, drained, and then immersed in the solution B. After immersing the precipitate for 15 minutes, the fiber was taken out and aged in an air atmosphere for 4 hours.
- Step 3 The aged fiber is placed in a microwave reactor, microwave heat treatment for 20 min, reaction conditions: microwave power 400 W, microwave generation time every 30 s for 10 s; then placed in a blast drying oven at 105 ° C for 5 h.
- the dried PTFE fiber was placed in a muffle furnace and heat-treated at 250 ° C for 4 h to obtain a bifunctional composite fiber #20 which was firmly supported with metal oxide.
- This embodiment is the same as the embodiment 17, except that in this embodiment, a 50 wt% manganese nitrate solution is 3.58 g, a lanthanum nitrate hexahydrate 17.36 g, and a zirconium nitrate pentahydrate 17.16 g to obtain a bifunctional composite of a strongly supported metal oxide. Fiber #21.
- This embodiment is the same as the embodiment 17, except that in this embodiment, a 50 wt% manganese nitrate solution of 14.32 g, a cerium nitrate hexahydrate of 4.34 g, and a zirconium nitrate pentahydrate of 17.16 g, a bifunctional composite of a strongly supported metal oxide is obtained. Fiber #22.
- the bifunctional composite filter fiber based on polyimide fiber is as follows:
- Step 1 Weigh 3.58g of manganese nitrate solution, 4.34g of cerium nitrate hexahydrate, 4.29g of zirconium nitrate pentahydrate, dissolved in deionized water 250mL, and stir evenly to obtain solution A. 19.2 g of ammonium carbonate was weighed, dissolved in deionized water and made up to 200 mL, and stirred until the ammonium carbonate solid was completely dissolved to obtain a homogeneous solution B (pH 9).
- Step 2 The polyimide fiber was immersed in the A solution for 60 min, and the ultrasonic assist time was 20 min. Then, the infiltrated polyimide fiber was taken out from the solution A, drained, immersed in the solution B, and the fiber was taken out after the immersion precipitation for 50 min, and placed. The air atmosphere aged for 4 hours.
- Step 3 The aged fiber is placed in a microwave reactor, microwave heat treatment for 20 min, and the reaction conditions are: microwave power 300 W, microwave generation time every 30 s for 10 s; then placed in a blast drying oven at 105 ° C for 5 h.
- the dried PTFE fiber was placed in a muffle furnace and heat-treated at 250 ° C for 4 h to obtain a bifunctional composite fiber #23 which was firmly supported with metal oxide.
- This embodiment is the same as the embodiment 23 except that the infiltration time of the fiber in the solution A is 80 min, and the infiltration time in the B solution is 30 min, and the bifunctional composite fiber with a firm metal oxide is obtained. twenty four.
- This embodiment is the same as the embodiment 23 except that the infiltration time of the fiber in the A solution is changed to 60 min, and the infiltration time in the B solution is changed to 40 min to obtain a bifunctional composite of the solid supported metal oxide. Fiber #25.
- This example is the same as the embodiment 23 except that 19.2 g of ammonium carbonate in the first step is changed to 21.2 g of sodium carbonate to obtain a bifunctional composite fiber #26 which is firmly supported with metal oxide.
- the 13 catalyst samples were tested for SCR denitration activity in a laboratory fixed-bed denitration reactor.
- the denitration reaction was tested at a reaction temperature of 125-250 ° C, a space velocity of 30 000 h -1 , a NH 3 concentration of 500 ppm, and a NO concentration of 500 ppm.
- the O 2 concentration was 3.5%, and N 2 was a balance gas.
- Table 2 The results are shown in Table 2.
- This comparative example was the same as that of Example 14, except that an ammonium carbonate solution having a pH of 7.5 was prepared as the solution B, and the fibers prepared by the comparative examples did not have catalytic denitration properties.
Abstract
Description
Claims (10)
- 一种双功能复合滤料纤维的制备方法,其特征是,(1)制备pH为8~12的碱性溶液A,将锰盐、铈盐和锆盐溶解于水中制备盐溶液B;A method for preparing a bifunctional composite filter fiber, characterized in that: (1) preparing an alkaline solution A having a pH of 8-12, and dissolving a manganese salt, a strontium salt and a zirconium salt in water to prepare a salt solution B;(2)将纤维浸入至碱性溶液A浸润15~70min,在浸润过程中进行超声辅助浸润一段时间,将浸润后的纤维沥干后浸入盐溶液B中浸渍沉淀一段时间;或,将纤维浸入至盐溶液B浸润,在浸润过程中进行超声辅助浸润一段时间,将浸润后的纤维沥干后浸入碱性溶液A中浸渍沉淀15~70min;(2) immersing the fiber into the alkaline solution A for 15 to 70 minutes, performing ultrasonic-assisted infiltration for a period of time during the infiltration process, draining the infiltrated fiber and immersing it in the salt solution B for a period of time; or, immersing the fiber in Infiltrated into the salt solution B, ultrasonically assisted infiltration for a period of time during the infiltration process, draining the infiltrated fibers and immersing in the alkaline solution A for immersion precipitation for 15 to 70 minutes;(3)将浸渍沉淀后的纤维取出后进行老化,将老化后的纤维进行微波热处理,最后进行活化处理即得双功能复合滤料纤维。(3) The immersed and precipitated fibers are taken out and aged, and the aged fibers are subjected to microwave heat treatment, and finally activated to obtain a bifunctional composite filter fiber.
- 如权利要求1所述的制备方法,其特征是,所述碱性溶液A为氨水、氢氧化钠溶液、碳酸铵溶液或碳酸钠溶液;The preparation method according to claim 1, wherein the alkaline solution A is ammonia water, sodium hydroxide solution, ammonium carbonate solution or sodium carbonate solution;或,所述的盐溶液B中的锰离子、铈离子和锆离子的摩尔比为1~8:1~4:1~4。Alternatively, the molar ratio of manganese ions, strontium ions and zirconium ions in the salt solution B is from 1 to 8:1 to 4:1 to 4.
- 如权利要求1所述的制备方法,其特征是,超声辅助浸润的时间为5~30min;The preparation method according to claim 1, wherein the ultrasonic assisted infiltration time is 5 to 30 min;或,当采用碱性溶液A浸润纤维时,所述浸渍沉淀的时间为30~80min;当采用盐溶液B浸润纤维时,所述浸润时间为30~80min。Or, when the fiber is infiltrated with the alkaline solution A, the time of the immersion precipitation is 30 to 80 min; when the fiber is infiltrated with the salt solution B, the infiltration time is 30 to 80 min.
- 如权利要求1所述的制备方法,其特征是,所述老化的时间为2~6h;The preparation method according to claim 1, wherein the aging time is 2 to 6 hours;或,所述老化是将浸渍沉淀后的纤维取出后在空气气氛进行老化。Alternatively, the aging is carried out by immersing the precipitated fibers and aging them in an air atmosphere.
- 如权利要求1所述的制备方法,其特征是,所述微波热处理的时间为10~40min,微波功率100-600W,每300s微波发生时间75-225s。The preparation method according to claim 1, wherein the microwave heat treatment time is 10 to 40 minutes, the microwave power is 100 to 600 W, and the microwave generation time is 75 to 225 s per 300 s.
- 如权利要求1所述的制备方法,其特征是,微波热处理后进行干燥后再进行活化;The preparation method according to claim 1, wherein the microwave heat treatment is followed by drying and then activation;优选的,所述干燥的条件为105℃烘干处理5h。Preferably, the drying condition is drying at 105 ° C for 5 h.
- 如权利要求1所述的制备方法,其特征是,所述活化处理是将纤维置于150~250℃一段时间;The preparation method according to claim 1, wherein the activation treatment is to place the fibers at 150 to 250 ° C for a period of time;优选的,所述活化处理的时间为2~8h。Preferably, the activation treatment time is 2-8 hours.
- 一种权利要求1~7任一所述的制备方法制备的复合滤料纤维。A composite filter fiber prepared by the preparation method according to any one of claims 1 to 7.
- 一种滤料,其特征是,有权利要求8所述的复合滤料纤维制备。A filter material characterized by the preparation of the composite filter fiber of claim 8.
- 一种权利要求8所述的复合滤料纤维或权利要求9所述的滤料在除尘脱硝中的应用。 Use of the composite filter fiber of claim 8 or the filter material of claim 9 for dust removal and denitrification.
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CN201710488583.0A CN107261644B (en) | 2017-06-23 | 2017-06-23 | A kind of difunctional composite filtering material fiber of low temperature dedusting-denitration and preparation method |
CN201710486860.4 | 2017-06-23 | ||
CN201710486860.4A CN107158799B (en) | 2017-06-23 | 2017-06-23 | A kind of composite filtering material fiber and preparation method for SCR dedusting denitration |
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