CN101209411A - Active carbon fiber with nano photocatalyst and processing method thereof - Google Patents
Active carbon fiber with nano photocatalyst and processing method thereof Download PDFInfo
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- CN101209411A CN101209411A CNA2006101616478A CN200610161647A CN101209411A CN 101209411 A CN101209411 A CN 101209411A CN A2006101616478 A CNA2006101616478 A CN A2006101616478A CN 200610161647 A CN200610161647 A CN 200610161647A CN 101209411 A CN101209411 A CN 101209411A
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- activated carbon
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 20
- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 12
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 12
- 230000001699 photocatalysis Effects 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 10
- 229920000297 Rayon Polymers 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 15
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 13
- 238000007146 photocatalysis Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 150000002484 inorganic compounds Chemical class 0.000 claims description 6
- 229910010272 inorganic material Inorganic materials 0.000 claims description 6
- 229910021645 metal ion Inorganic materials 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- 150000002894 organic compounds Chemical class 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 150000003863 ammonium salts Chemical class 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 229910052793 cadmium Inorganic materials 0.000 claims description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910000348 titanium sulfate Inorganic materials 0.000 claims description 3
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 2
- 150000001298 alcohols Chemical group 0.000 claims description 2
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 150000002736 metal compounds Chemical class 0.000 claims description 2
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 27
- 239000003054 catalyst Substances 0.000 abstract description 22
- 239000002912 waste gas Substances 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000746 purification Methods 0.000 abstract description 8
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 2
- 239000010426 asphalt Substances 0.000 abstract 1
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 239000010815 organic waste Substances 0.000 abstract 1
- 239000002759 woven fabric Substances 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 8
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000003197 catalytic effect Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 238000006555 catalytic reaction Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 241000700605 Viruses Species 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- -1 hydroxyl radical free radical Chemical class 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- LXASOGUHMSNFCR-UHFFFAOYSA-D [V+5].[V+5].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O Chemical compound [V+5].[V+5].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O LXASOGUHMSNFCR-UHFFFAOYSA-D 0.000 description 1
- DCGQUTJLMIWWSV-UHFFFAOYSA-N [W].[N+](=O)(O)[O-] Chemical compound [W].[N+](=O)(O)[O-] DCGQUTJLMIWWSV-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 229920006306 polyurethane fiber Polymers 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
An active carbon fiber with a nano photocatalyst and a processing method thereof. The invention provides a purification material for low-concentration organic waste gas or odor and a processing method thereof, and mainly relates to a used doped composite photocatalytic material and a carrier attached with the material. The composite material is asphalt base or viscose base, the fiber is short fiber, woven fabric or felt, the surface of the fiber body is evenly attached with active carbon particles, and nanometer level photocatalyst is evenly attached to the surface of the active carbon particles and in gaps among the particles. The active carbon fiber material adopted by the invention is used as a catalyst carrier, has good adsorption effect, and can play a temporary adsorption effect on substances which are not catalyzed and decomposed in time in the waste gas, so that the retention time of pollutant molecules in a photocatalytic area is selectively prolonged, and the full removal of pollutants is facilitated.
Description
Technical field
The present invention proposes the scavenging material and the processing method thereof of a kind of low-concentration organic exhaust gas or foul smell, relate generally to used doped and compounded catalysis material and be attached with the carrier of this material.
Background technology
Along with the expansion of worker, Agricultural Development and urban population, the pollution problem of foul gas is outstanding day by day, and caused for people's quality of life and have a strong impact on, and health that can direct harmful to human.Aspect foul smell source, city, the collection of municipal wastewater and processing procedure are to cause the main cause of foul smell discharging, and wherein the foul smell emission behaviour of sewage pumping station and sewage treatment plant is the most serious.In addition, also can discharge a large amount of foul gas in places such as the collection of domestic waste, ight soil, transhipments, to around environmental quality do great damage, also affect the image of modern metropolitan cities simultaneously.Along with the raising of the public, in rapid increase, become and one of environmental issue to be solved at the incident of the complaint of the pollution problem of stench and complaint to living environment quality consciousness.
Conventional foul gas improvement technology mainly contains absorption method, absorption process and biological decomposition method etc.But because the particularity of municipal wastewater foul smell that system discharges, said method is difficult to it is carried out economy, effectively handles, and is badly in need of exploiting economy and effectively administers new technology.
In recent years, be that the photocatalysis oxidation technique of catalyst receives publicity in the waste gas purification Application for Field with the metal oxide semiconductor.This technology is directly utilized ultraviolet light activated catalyst at normal temperatures, makes its surface generate free electron (e
-) and hole (H
+) right, the luminous energy that absorbs is changed into chemical energy, promptly have photocatalysis.When being free G﹠W steam to exist, free electron on the catalyst surface or hole are decomposed and can be produced the hydroxyl radical free radical (OH) of strong oxidizing property, oxygen (O), ozone (O3) and the hydrogen peroxide (H of atomic state with adsorbed water or steam effect
2O
2) etc., these materials have very strong oxidation, thereby with the smell substance in the waste gas (as hydrogen sulfide, ammonia etc.) oxidation Decomposition, reach deodorizing effect.
Titanium dioxide (TiO2) is the photochemical catalyst that using value is arranged most at present, and existing application in the waste gas purification field.Yet, simple can only utilize the ultraviolet light of wavelength during as photochemical catalyst less than 387.5nm with titanium dioxide, the light bigger for wavelength can't utilize.Because the natural daylight medium wavelength is less than the light proportion very little (＜4%) of 387.5nm, therefore general photochemical catalyst can't effectively utilize natural daylight.And because light wavelength that most ultraviolet source produces also distributes in certain limit, its medium wavelength also can't be utilized effectively greater than the light of 387.5nm, causes energy dissipation to a great extent.In these cases,, make photochemical catalyst can utilize the light source of wavelength broad, the utilization ratio of all luminous energy is increased, even can directly utilize natural daylight if can adopt suitable processing method.
In addition, because pumping plant or other industrial waste gas gas flow are generally higher, in the time of staying that light catalytic purifying is indoor very limited (how below 5 seconds), and the speed of light-catalyzed reaction is relatively slow, and some pollutant also has little time to react with active particle.Therefore, need take suitable method, optionally increase the time of staying of contaminant molecule in photocatalytic region.Simultaneously in the photochemical catalyst district, also can produce small amount of ozone, how fully ozone and to reduce its loss also be one of key issue of photocatalysis waste gas purification technology.
The disclosed application number of State Intellectual Property Office is 200410029904.3, and name is called the patented technology of " a kind of nano titanic oxide sol and preparation method thereof ", and it provides a kind of nano titanic oxide sol with photo-catalysis function and preparation method thereof.But it can only realize photocatalysis under ultraviolet light.
Summary of the invention
The present invention is directed to the existing problem of photocatalysis waste gas purification technology, having proposed with the NACF is the carrier of photochemical catalyst, makes it can realize the activated carbon fiber with nano-scale photocatalyst and the processing method thereof of photocatalysis under broad spectrum.
Technical scheme of the present invention is: it is asphaltic base or viscose glue base, and fiber is short fiber, weaves cotton cloth or felt that the surface of corpus fibrosum evenly is attached with activated carbon granule, evenly is attached with nano-scale photocatalyst in activated carbon granule surface and particle gap.
NACF is loaded in and forms the photocatalysis filter course in the carriage that has supporting network or support bar.
Processing method of the present invention, it comprises the steps:
1) organic compound of titanium or inorganic compound are added in the solvent stir, wherein the conversion of the organic compound of titanium or inorganic compound accounts for 2～30% of target solution total amount for the weight of titanium dioxide; Be concentration that the sulfuric acid of 1-10% adds above-mentioned solution by 1: 0.5～2 volume ratio again, stir; Adjust pH value to 6～7 of mixed liquor afterwards, stirred 3～7 minutes, make A solution;
2) choose modification and mix, for high valence state metal oxide metering, use deionized water that it is formulated as the solution of concentration 1-5% its conversion, make B solution with the solubility nitrate or the organic salt of metal ion;
3) A, B are mixed, make that the ratio of blended metal oxide and titanium dioxide weight is 0.01～0.2: 1 in the solution; Adjust the pH of mixed value afterwards and be transferred to 6.5～7.5, and stir, make colloidal sol;
4) take by weighing a certain amount of NACF, it is inserted in the large container, the colloidal sol of getting certain volume soaks NACF, makes the titaniferous in the colloidal sol, colloidal sol and a small amount of ammonium salt of modified metal ion deposit to carbon fiber surface gradually, and soak time was controlled at about 3～7 hours;
5) NACF after will soaking is again pulled out, inserts in the baking oven after draining the water, and heats to 90 ℃～110 ℃ oven dry;
6) utilize the Muffle furnace have nitrogen protection,, make to be deposited on the lip-deep particle of NACF and to be converted into nano level doping photocatalyst material the calcination 3～4 hours in the environment of 430 ℃～470 ℃ anaerobic of above-mentioned dried NACF;
7) last, with the NACF after the above-mentioned processing, insert in the carriage, making thickness is the fiber filtering layer of 10～30mm.
The organic compound of described titanium is: titanium tetraisopropylate acid esters, butyl titanate, and inorganic compound is: titanium sulfate, titanium tetrachloride; Wherein one or more.
Described modified metal compound is the solubility nitrate of palladium bichloride or iron, tungsten, vanadium, iron, cadmium, zirconium or in the organic salt one or more.
Described solvent is an alcohols solvent.
The present invention is based on photocatalysis technology principle and absorption-kinetics theory, adopted suitable chemical substance and processing method that titanium deoxide catalyst is carried out modification, make the catalyst after the processing have higher light-catalyzed reaction activity, and can utilize the bigger ultraviolet light of wavelength, or even natural daylight.The material that is used for modification has metal oxides such as palladium, tungsten, vanadium, iron, cadmium, zirconium and ammonium salt etc.In order to give full play to the effect of photochemical catalyst, it is carrier that the present invention adopts high performance activated carbon fiber.Because activated carbon fiber has characteristics such as porous is good, specific area is big, can make catalyst even, stable be dispersed in its surface.To be loaded with the NACF of modified light catalyst, insert in the photocatalysis chamber, under the irradiation of common uv lamp, get final product work with certain form.In addition, activated carbon fiber material of the present invention is except that being used as catalyst carrier, also have the good adsorption effect concurrently, can in time be played " temporarily " suction-operated with failing in the waste gas by the material of catalytic decomposition, thereby optionally prolonged the time of staying of contaminant molecule, helped the abundant removal of pollutant in photocatalytic region.
Light catalytic purifying device of the present invention has the purification efficiency height, energy consumption is low, capacity usage ratio is high, facility compact, purification thoroughly reach characteristics such as good economy performance, is suitable for big flow, low concentration gas or foul gas and purifies.
Description of drawings
Fig. 1 is the operation principle schematic diagram of the present invention in concrete the application
1 is gas vent among the figure, the 2nd, and ultraviolet lamp tube, the 3rd, lamp bracket, the 4th, active carbon fiber photocatalyst frame, the 5th, coarse strainer, the 6th, gas feed, the 7th, odor removal shell, the 8th, gas guide board;
Fig. 2 be among Fig. 1 A to view
9 is frames among the figure, the 10th, and support bar, the 11st, NACF layer.
The specific embodiment
Embodiment 1
1) getting 500mL concentration is 90% titanium tetraisopropylate acid esters, inserts in the big mouthful of container of 10L, and is diluted to 5L with isopropyl alcohol (chemical pure 90%).Slowly add 10% aqueous hydrochloric acid solution 1L again, and under the rotating speed of 200rpm, stir with electric mixer.Afterwards, will reconcile about the pH value to 6.5 of above-mentioned mixed liquor with 30% ammonia spirit again, and stir 5 minutes, make standby Sol A solution.
2) getting concentration is 40% vanadium oxalate solution 50mL, with deionized water it is diluted to 500mL after, slowly be added in the container of splendid attire Sol A solution, and constantly stir.To mix the pH value with 30% ammonia spirit again and be transferred to about 7, and continue to stir fast to make C liquid.
3) take by weighing 5 parts of viscose-based active carbon fiber felts, every part is 0.8kg; C liquid after fully stirring is divided into 5 parts equably, inserts in the large container respectively.5 parts of NACFs are inserted respectively in the C liquid after the packing soak, make the titaniferous in the solution, colloidal sol and a small amount of ammonium salt of modified metal ion deposit to carbon fiber surface gradually, soak time was controlled at about 5 hours.
4) NACF after will soaking is pulled out, inserts in the baking oven oven dry about 100 ℃ after draining the water; Utilization has the Muffle furnace of nitrogen protection, with in the environment of the anaerobic of above-mentioned dried NACF about 450 ℃ calcination 3-4 hour, makes to be deposited on the lip-deep particle of NACF and to be converted into nano level doping photocatalyst material.
5) again with the NACF after the above-mentioned processing, insert five carriages interior (1200～1200) as shown in Figure 2 respectively, make the fibrous filter layer that thickness is 20mm.5 filter courses and ultraviolet light (4 groups, every group of 8 fluorescent tubes, single power 40W) arrange alternately that by form shown in Figure 1 the distance of fluorescent tube and Catalytic Layer is 250mm.The optical source wavelength of used uviol lamp is the uviol lamp at 300-400nm in the patent of the present invention, also can adopt the visible light source of 400-700nm to improve the efficient of light catalytic purifying dusty gas.When waste gas from the inlet of purifier through (removing impurity such as particle the waste gas and droplet) after filtering, enter and when flowing through photocatalytic region, pollutant is wherein directly decomposed under light-catalysed effect or absorption is earlier decomposed again, also can kill bacterium in the waste gas, virus etc. simultaneously effectively.Gas after being cleaned is discharged from outlet.
Test result shows, when exhaust gas flow is 4000m
3/ h, concentration of hydrogen sulfide are 10mg/m
3The time, by above-mentioned photochemical catalyst device, the clearance of hydrogen sulfide can be reached more than 95% steadily in the long term, the stink of waste gas is eliminated substantially, satisfies environmental requirement fully.Yet when NACF did not contain photochemical catalyst, the removal efficient of hydrogen sulfide only was about 70%, and removed efficient progressively decline with the prolongation of the running time of equipment.As seen, modified photocatalytic technology used herein has good waste gas purification effect.
1) getting 1000mL concentration is 40% titanium sulfate solution, inserts in the big mouthful of container of 5L, and is diluted to 3L with deionized water.Open electric mixer, under the rotating speed of 200rpm, stir.And will reconcile with 30% ammonia spirit about the pH value to 6.5 of above-mentioned mixed liquor, and stirred 5 minutes, make standby Sol A solution.
2) getting concentration is 20% palladium chloride solution 20mL, with deionized water it is diluted to 100mL after, slowly be added in the container of splendid attire Sol A solution, and constantly stir.To mix the pH value with 30% ammonia spirit again and be transferred to about 7, and continue to stir fast to make C liquid.
3) take by weighing 5 parts of viscose-based active carbon fiber felts, every part is 0.8kg; C liquid after fully stirring is divided into 5 parts equably, inserts in the large container respectively.5 parts of NACFs are inserted respectively in the C liquid after the packing soak, make the titaniferous in the solution, colloidal sol and a small amount of ammonium salt of modified metal ion deposit to carbon fiber surface gradually, soak time was controlled at about 5 hours.
4) NACF after will soaking is pulled out, inserts in the baking oven oven dry about 100 ℃ after draining the water; Utilization has the Muffle furnace of nitrogen protection, with in the environment of the anaerobic of above-mentioned dried NACF about 450 ℃ calcination 3-4 hour, makes to be deposited on the lip-deep particle of NACF and to be converted into nano level doping photocatalyst material.
5) again with the NACF after the above-mentioned processing, insert 5 carriages interior (1200～1200) as shown in Figure 2 respectively, make the fibrous filter layer that thickness is 20mm.5 filter courses and uviol lamp close (4 groups, every group of 8 fluorescent tubes, single power 40W) arranges alternately that by form shown in Figure 1 the distance of fluorescent tube and Catalytic Layer is 250mm.The optical source wavelength of used uviol lamp is the uviol lamp at 300-400nm in the patent of the present invention, also can adopt the visible light source of 400-700nm to improve the efficient of light catalytic purifying dusty gas.When waste gas from the inlet of purifier through (removing impurity such as particle the waste gas and droplet) after filtering, enter and when flowing through photocatalytic region, pollutant is wherein directly decomposed under light-catalysed effect or absorption is earlier decomposed again, also can kill bacterium in the waste gas, virus etc. simultaneously effectively.Gas after being cleaned is discharged from outlet.
Test result shows, when exhaust gas flow is 4000m
3/ h, concentration of hydrogen sulfide are 10mg/m
3The time, by above-mentioned photochemical catalyst device, the clearance of hydrogen sulfide can be reached more than 90% steadily in the long term, the stink of waste gas is eliminated substantially, satisfies environmental requirement.
Embodiment 3
The preparation method of A liquid is with example 1, but C liquid changes the nitric acid tungsten solution 100mL of use 10% into.Adopt the way identical, catalyst is dispersed in the polyurethane fiber felt of 5kg carrying active powdered carbon, prepare required catalysis material with example 1.
The fiber that is loaded with catalyst and active carbon after will above-mentioned processing, pack into example 1 described identical purifier in test.The result shows, when exhaust gas flow is 2000m
3/ h, concentration of hydrogen sulfide are 8mg/m
3The time, by above-mentioned photochemical catalyst device, the clearance of hydrogen sulfide can be reached more than 85% steadily in the long term, the stink of waste gas is eliminated substantially.
Further specify the operation principle of the present invention in concrete the application below in conjunction with accompanying drawing.
As Fig. 1, establish gas feed 6 and gas vent 1 respectively at the two ends of box-shaped odor removal shell 7, establish gas guide board 8 respectively in the inside at odor removal shell 7 two ends; In the case of gas feed 6 one sides, be horizontally set with a coarse strainer 5, active carbon fiber photocatalyst frame 4 and lamp bracket 3 are set then one by one; The some ultraviolet lamp tubes 2 of installing in the lamp bracket 3.As Fig. 2, active carbon fiber photocatalyst frame 4 is made of frame 9, support bar 10 and the NACF layer 11 that is laid in wherein.
After waste gas enters gas feed 6, by gas guide board 8 effects, form uniform air flow on the cross section in case, behind coarse strainer 5, impurity such as particle in the waste gas and droplet are adsorbed; Gas after the coarse filtration enters and when flowing through photocatalytic region, pollutant is wherein directly decomposed under light-catalysed effect or absorption is earlier decomposed again, also can kill bacterium in the waste gas, virus etc. simultaneously effectively.Gas after being cleaned is discharged from exporting 1.
Claims (6)
1. activated carbon fiber with nano-scale photocatalyst, be asphaltic base or viscose glue base, fiber is short fiber, weaves cotton cloth or felt that the surface of corpus fibrosum evenly is attached with activated carbon granule, it is characterized in that, in activated carbon granule surface and particle gap, evenly be attached with nano-scale photocatalyst.
2. the activated carbon fiber with nano-scale photocatalyst according to claim 1 is characterized in that, NACF is loaded in and forms the photocatalysis filter course in the carriage that has supporting network or support bar.
3. the processing method with activated carbon fiber of nano-scale photocatalyst according to claim 1 is characterized in that it comprises the steps:
1) organic compound of titanium or inorganic compound are added in the solvent stir, wherein the conversion of the organic compound of titanium or inorganic compound accounts for 2～30% of target solution total amount for the weight of titanium dioxide; Be concentration that the sulfuric acid of 1-10% adds above-mentioned solution by 1: 0.5～2 volume ratio again, stir; Adjust pH value to 6～7 of mixed liquor afterwards, stirred 3～7 minutes, make A solution;
2) choose modification and mix, for high valence state metal oxide metering, use deionized water that it is formulated as the solution of concentration 1-5% its conversion, make B solution with the solubility nitrate or the organic salt of metal ion;
3) A, B are mixed, make that the ratio of blended metal oxide and titanium dioxide weight is 0.01-0.2 in the solution: 1; Adjust the pH of mixed value afterwards and be transferred to 6.5～7.5, and stir, make colloidal sol;
4) take by weighing a certain amount of NACF, it is inserted in the large container, the colloidal sol of getting certain volume soaks NACF, makes the titaniferous in the colloidal sol, colloidal sol and a small amount of ammonium salt of modified metal ion deposit to carbon fiber surface gradually, and soak time was controlled at about 3～7 hours;
5) NACF after will soaking is again pulled out, inserts in the baking oven after draining the water, and heats to 90 ℃～110 ℃ oven dry;
6) utilize the Muffle furnace have nitrogen protection,, make to be deposited on the lip-deep particle of NACF and to be converted into nano level doping photocatalyst material the calcination 3～4 hours in the environment of 430 ℃～470 ℃ anaerobic of above-mentioned dried NACF;
7) last, with the NACF after the above-mentioned processing, insert in the carriage, making thickness is the fiber filtering layer of 10～30mm.
4. the processing method with activated carbon fiber of nano-scale photocatalyst according to claim 3 is characterized in that, the organic compound of described titanium is: titanium tetraisopropylate acid esters, butyl titanate, and inorganic compound is: titanium sulfate, titanium tetrachloride; Wherein one or more.
5. the processing method with activated carbon fiber of nano-scale photocatalyst according to claim 3, it is characterized in that described modified metal compound is the solubility nitrate of palladium bichloride or iron, tungsten, vanadium, iron, cadmium, zirconium or in the organic salt one or more.
6. the processing method with activated carbon fiber of nano-scale photocatalyst according to claim 3 is characterized in that, described solvent is an alcohols solvent.
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