CN101322903A - Method for desulfurizing and denitrifying gas - Google Patents
Method for desulfurizing and denitrifying gas Download PDFInfo
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- CN101322903A CN101322903A CNA2008101232871A CN200810123287A CN101322903A CN 101322903 A CN101322903 A CN 101322903A CN A2008101232871 A CNA2008101232871 A CN A2008101232871A CN 200810123287 A CN200810123287 A CN 200810123287A CN 101322903 A CN101322903 A CN 101322903A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000003009 desulfurizing effect Effects 0.000 title abstract 2
- 230000001699 photocatalysis Effects 0.000 claims abstract description 55
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003054 catalyst Substances 0.000 claims abstract description 24
- 238000007146 photocatalysis Methods 0.000 claims abstract description 23
- 239000012528 membrane Substances 0.000 claims abstract description 22
- 230000008929 regeneration Effects 0.000 claims abstract description 17
- 238000011069 regeneration method Methods 0.000 claims abstract description 17
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 5
- 230000003197 catalytic effect Effects 0.000 claims description 12
- 239000000919 ceramic Substances 0.000 claims description 11
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 235000012489 doughnuts Nutrition 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000009418 renovation Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 30
- 230000008901 benefit Effects 0.000 abstract description 4
- RZCJYMOBWVJQGV-UHFFFAOYSA-N 2-naphthyloxyacetic acid Chemical compound C1=CC=CC2=CC(OCC(=O)O)=CC=C21 RZCJYMOBWVJQGV-UHFFFAOYSA-N 0.000 abstract 1
- 231100001143 noxa Toxicity 0.000 abstract 1
- 239000002341 toxic gas Substances 0.000 abstract 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 14
- 239000000428 dust Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
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- 239000002253 acid Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003500 flue dust Substances 0.000 description 3
- -1 hydroxyl radical free radical Chemical class 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000002485 combustion reaction Methods 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
- 238000007598 dipping method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
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- 231100000614 poison Toxicity 0.000 description 1
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- 229920000428 triblock copolymer Polymers 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The invention relates to a method for desulfurizing and denitrating gas, which is characterized in that the gas to be treated is pressed into an inorganic membrane with a photocatalytic active layer and a separation active layer under the action of pressure, the gas is firstly pressed through the separation active layer under the action of pressure to realize gas-solid separation, then the gas passing through the separation layer reaches the photocatalytic active layer and then undergoes photocatalytic oxidation reaction under the irradiation of ultraviolet light to generate nitric acid and sulfuric acid, and SO is removed2And NOXA toxic gas. Because the inorganic membrane has a through hole structure with high porosity, the invention has the advantages of high ultraviolet light utilization rate, high photocatalysis efficiency, easy catalyst regeneration and capability of simultaneously recovering sulfuric acid and nitric acid.
Description
Technical field
The present invention relates to the method for a kind of gas sweetening and denitration, particularly adopt inoranic membrane, remove SO with photocatalytic activity layer and isolating active layer
2And NO
XDeng the new technology of poisonous gas, relate to the air cleaning and the waste gas pollution control and treatment in environmental protection field.
Background technology
The SO that produces in the combustion of fossil fuel process
2And NO
XBe the main toxic pollutant source of atmosphere pollution, therefore, relevant both at home and abroad scholar and research institution have carried out a large amount of research to this.At present, industrial to SO
2The main employing lime stone breast that removes spray absorption process, to NO
XRemove main employing selective catalytic reduction, these two kinds of methods all depend on a large amount of consumption to materials such as lime stone and ammoniacal liquor.Photocatalysis oxidation technique is an air purifying process that grew up in recent years, has advantages such as reaction condition gentleness, energy consumption is low, secondary pollution is few, receives increasing concern in the energy-saving and emission-reduction field.The cardinal principle of photocatalytic method desulphurization denitration is reactant SO
2And NO
XAt first reach the surface of catalyst, work as TiO by absorption
2Formed hydroxyl radical free radical (OH), superoxide ion free radical (O when being subjected to the ultraviolet ray irradiation with strong oxidizing property
2 -) and free radical such as OOH, can be with SO
2And NO
XOxidation generates SO
4 2-And NO
3 -, but this method still is in the laboratory research stage, the subject matter that restricts its industrial applications is: (1) is difficult to be applied to and contains the flue dust system.In practical systems, often there is a large amount of dust, this has directly influenced the utilization rate and the photocatalysis effect of ultraviolet light.(2) adsorption capacity of catalyst is poor.The structure of the photochemical catalyst that adopts is superfine powder and two kinds of forms of film at present, the specific area of the photochemical catalyst of these two kinds of forms is all less, thereby when it was used for gas purification process, low excessively adsorption capacity had often limited the performance of catalyst function, recent studies show that by at TiO
2Middle active carbon and the Fe of adding
2O
3Can effectively improve denitration effect Deng adsorption enhancer, but this also reduces the activity of such catalysts position simultaneously, therefore adopted high-specific surface area to have the TiO of good adsorption characteristic
2Photochemical catalyst is the effective way that addresses this problem.(3) catalyst regeneration difficulty.The product of light-catalyzed reaction is the thick liquid that comprises nitric acid, sulfuric acid, these liquid are easily in the catalyst surface enrichment, and then cause the photochemical catalyst inactivation, therefore need frequent regeneration, but traditional photochemical catalyst regeneration difficulty, and the diluted acid that generates can't be recycled because of often containing impurity such as exhaust gas dust, therefore produces new pollution.
Inorganic ceramic membrane is widely used in the energy-saving and emission-reduction field because of having good separating property, chemical stability and being easy to advantages such as regeneration.In recent years, the present patent application people adopts template to prepare macropore (ZL 200610037611.9) and the mesoporous ceramic membrane (application number 200810023906.X) of high porosity, high-specific surface area, the Detitanium-ore-type TiO that utilizes these methods to synthesize to have photo-catalysis function
2Or the Detitanium-ore-type TiO of N doping
2Film, TiO is adopted in being developed as of these film kinds
2Photocatalysis membrana carries out desulphurization denitration provides possibility, does not still have employing TiO but take a broad view of document
2Photocatalysis membrana carries out the research report of desulphurization denitration.
Summary of the invention
The objective of the invention is to be difficult to be applied to the method that contains deficiency such as flue dust system, adsorption capacity are poor, catalyst regeneration difficulty and a kind of gas sweetening and denitration are provided in order to improve existing photocatalytic method.
General thought of the present invention is to adopt the TiO with photocatalytic activity
2Ceramic membrane by the coupling of flue dust subtractive process and photocatalytic process, improves the ultraviolet light utilization rate; Utilize TiO
2The high-specific surface area of ceramic membrane rete improves photochemical catalyst to SO
2And NO
XAbsorption and removal effect; Simultaneously, based on ceramic membrane good duct characteristic and separating property, provide a kind of easy renovation process, and effectively reclaim nitric acid, the sulfuric acid that reaction generates in the photochemical catalyst regenerative process, by the preferred and design of material, implementation procedure is integrated.
Concrete technical scheme of the present invention is: the method for a kind of gas sweetening and/or denitration, it is characterized in that pending gas is pressed into the inoranic membrane with photocatalytic activity layer and isolating active layer under pressure, at first pressed the separation active layer, realize gas solid separation, then behind the gas arrival photocatalytic activity layer by separating layer, under the irradiation of ultraviolet light, carry out photocatalysis oxidation reaction, generate nitric acid and sulfuric acid, remove SO
2And NO
XPoisonous gas.
The inoranic membrane that the present invention adopts has photocatalytic activity layer and isolating active layer, concrete preparation method can be with reference to institute's reported method among patent ZL 200610037611.9, the 200810023906.X of the present patent application people application, can be chip, tubular type and doughnut formula, for ease of the irradiation of ultraviolet light, employing tubular type and doughnut formula inoranic membrane time catalytic active layer should be at outer surfaces.
Isolating active layer of the present invention can be porous ceramics, stainless steel sintered body or porous alloy film, as the case may be, pore diameter range can be between 100nm～10 μ m, porosity is between 30～70%, the isolating active layer is also played a supporting role simultaneously, for photocatalysis film provides certain intensity to satisfy the requirement of gas backwash.
Photocatalytic activity layer of the present invention is the TiO at isolating active laminar surface sintering
2Or the TiO that mixes
2Porous membrane, TiO wherein
2Porous membrane be Detitanium-ore-type TiO
2Or the Detitanium-ore-type TiO of N doping
2Film, the Detitanium-ore-type TiO that N mixes
2The doping of N is with TiO in the film
2Mole be benchmark, the molar content of N is 0.2～6%, thickness range is 100nm～30 μ m, pore diameter range is 2nm～5 μ m, porosity ranges is 30～65%.Different with traditional photocatalysis film, because therefore this loose structure as perforation of photocatalytic activity layer have bigger specific area and good duct characteristic, can effectively improve the photocatalysis effect, and for fluid provides low resistance flow channel, easier recovery and regeneration.
Moulding pressure of the present invention is between 0.01～2MPa.
The renovation process of photocatalysis membrana of the present invention is: when removal efficiency drops to 70-88%, adopt the compressed air recoil to remove the solid particle of fenestra and the obstruction of film surface, feed the regeneration that water vapour is used for catalytic active layer from separating side then, reclaim nitric acid, sulfuric acid simultaneously.Because the perforation duct of photocatalysis membrana itself is compared with traditional photochemical catalyst, has the advantage of regenerating easily and can reclaim nitric acid, sulfuric acid simultaneously.
The compressed air pressure that is used to recoil of the present invention is between 0.2～2MPa.
The present invention can be used for the treating tail gas that gas sweetening, gas denitration and while desulphurization denitration, particularly combustion of fossil fuel produce.
Beneficial effect:
By with pending gas by having the rete of difference in functionality, realized the coupling of dust removal process and photocatalytic process, improved ultraviolet light utilization rate and photocatalysis efficiency.
2. compare with traditional photochemical catalyst, photocatalysis membrana this as the porous membrane structure that connects, therefore have bigger specific area and good duct characteristic, can effectively improve the photocatalysis effect, and provide low resistance flow channel for fluid.
3. have certain intensity because the isolating active layer can be porous ceramics, stainless steel sintered body, porous alloy film, therefore can play a supporting role, can satisfy the requirement of gas backwash.
4. the duct that connects by means of the integral body of photocatalysis membrana can be realized the regeneration of catalyst very easily, reclaims nitric acid, sulfuric acid simultaneously.
Description of drawings
Fig. 1 is the micro-structural electron micrograph of photocatalysis membrana.
The X-ray diffractogram of Fig. 2 photocatalytic activity layer.
Fig. 3 is a photocatalysis membrana operation principle schematic diagram.
Fig. 4 is a compressed air backsurging principle schematic diagram.
Fig. 5 is the regeneration principle schematic diagram of photocatalytic activity layer.
Fig. 6 is N doping type TiO
2The x-ray photoelectron power spectrum.
Wherein A is the photocatalytic activity layer, and B is the isolating active layer, and C is the reaction side of reactor, and D is the separation side of reactor, and E is a ultraviolet light, and F is pending gas, and G is for purifying back gas, and I is a steam, and J is an acid solution.
The specific embodiment
Below in conjunction with Fig. 1-Fig. 6 the specific embodiment of the present invention is described.
Embodiment 1
Adopt photocatalysis membrana according to the institute's reported method preparation among the patent 200810023906.X, adopting the colloidal sol particle diameter is 5nm, 1.0molL
-1Titanium colloidal sol in add triblock copolymer template agent (EO)
20(PO)
70(EO)
20(molecular weight is 5800gmol
-1) obtain stable coating liquid.Adopt dipping to be coated with membrane technology then and film, after wet film was dried, dries, calcining obtained the titanium dioxide ceramic milipore filter that the aperture is 5nm under 400 ℃.Its micro-structural is made up of the porous active layer with difference in functionality, and A is the photocatalytic activity layer, and B is the isolating active layer.As shown in Figure 1, photocatalytic activity layer material is Detitanium-ore-type TiO
2, as shown in Figure 2.Its thickness is 3 μ m, and the aperture is 5nm, and porosity is 60%, and specific area is 150m
2.g
-1Separating layer is that the aperture is the Al of 200nm
2O
3Ceramic membrane, porosity are 40%.With the chip film is example, and concrete operation principle is described, as shown in Figure 3, adopting the top is the closed container of quartz glass, and container is divided into the reaction side and separates side by photocatalysis membrana, and the high-pressure sodium lamp that adopts 250W is as ultraviolet source.Comprise SO
2(2ppm) and the pending gas of NO (1ppm) under 0.5MPa, remove impurity such as dust from separating side through the isolating active layer, arrive the photocatalytic activity layer, SO
2Be adsorbed on the photocatalytic activity layer with NO, ultraviolet light sees through quartz glass and is radiated at the photocatalytic activity laminar surface, and photocatalysis oxidation reaction takes place, and generates SO
4 2-And NO
3 -, SO
2With the removal efficiency of NO be 91%.Along with SO
4 2-And NO
3 -At catalytic active layer enrichment, SO
2Constantly reduce with the removal efficiency of NO, when removal efficiency is reduced to 85%, stop air inlet.Purge 2 times with compressed air (1.2MPa) from the reaction side, as shown in Figure 4.Re-use water vapour and cross rete, with the SO of catalytic active layer enrichment from separating side pressure
4 2-And NO
3 -With the form wash-out of sulfuric acid and nitric acid, finish catalytic active layer regeneration, and can be from reaction side reclaim sulfuric acid and nitric acid (as shown in Figure 5), generate in the acid impurity such as no dust, catalyst regeneration is respond well, SO after repeatedly using
2Still can remain on more than 90% with the NO removal efficiency, restored acid concentration is more than 60%.
Embodiment 2
Photocatalytic activity layer material is Detitanium-ore-type TiO
2, its thickness is 100nm, and the aperture is 2nm, and porosity is 60%, and specific area is 210m
2.g
-1Separating layer is that the aperture is the stainless steel sintered body (porosity is 35%) of 100nm.Pending gas is for comprising SO
2The admixture of gas of (concentration is 2ppm) and dust, gas mixes through being pressurized to 0.8MPa, presses the separation active layer to remove impurity such as dust, arrives the photocatalytic activity layer, SO
2Be adsorbed on the photocatalytic activity layer, issue third contact of a total solar or lunar eclipse catalytic oxidation in the irradiation of ultraviolet light and generate SO
4 2-, SO
2Removal efficiency be 94%, along with SO
4 2-In the catalytic active layer enrichment, when removal efficiency is reduced to 88%, stop air inlet, purge 3 times with compressed air (1.8MPa) from reverse, re-use water vapour and cross rete, with the SO of catalytic active layer enrichment from separating side pressure
4 2-With sulfuric acid form wash-out, finish catalyst regeneration, and recyclable sulfuric acid, generate in the acid impurity such as no dust, catalyst regeneration is respond well, repeatedly uses SO afterwards
2Removal efficiency still can remain on 92%, and sulfuric acid concentration is 62%.
Embodiment 3
The photocatalysis membrana that adopts is according to the institute's reported method preparation among the patent ZL 200610037611.9, concrete grammar is to adopt isooctane/formamide emulsion of 1.8 μ m as template, be distributed in the titanium colloidal sol and form preparation liquid, adopting dipping to be coated with membrane technology then films, preparation liquid is coated in the alloy film that the aperture is 5 μ m (porosity is 40%) surface, behind 60 ℃ of stripper plates, calcining obtains the titanium dioxide ceramic milipore filter that the aperture is 1.1 μ m under 400 ℃.Photocatalytic activity layer material is the Detitanium-ore-type TiO that N mixes
2, as shown in Figure 6, its N content is 1%, and its thickness is 30 μ m, and porosity is 50%; Pending gas is for comprising the admixture of gas of NO (concentration is 2ppm) and dust, gas is blended under the pressure of 0.2MPa, remove impurity such as dust through the isolating active layer, arrive the photocatalytic activity layer, NO is adsorbed on the photocatalytic activity layer, issues third contact of a total solar or lunar eclipse catalytic oxidation in the irradiation of ultraviolet light and generates NO
3 -, the NO removal efficiency is 85%, along with NO
3 -In the catalytic active layer enrichment, when removal efficiency is reduced to 78%, stop air inlet, purge 3 times with compressed air (1MPa) from reverse, re-use water vapour and cross rete, with the NO of catalytic active layer enrichment from separating side pressure
3 -With the form wash-out of nitric acid, finish catalyst regeneration, and recyclable nitric acid, catalyst regeneration is respond well, repeatedly uses back NO removal efficiency still can remain on 81%, and concentration of nitric acid is 50%.
Claims (7)
1. the method for gas sweetening and denitration, it is characterized in that pending gas is pressed into the inoranic membrane with photocatalytic activity layer and isolating active layer, at first pressed the separation active layer, realize gas solid separation, then behind the gas arrival photocatalytic activity layer by separating layer, under the irradiation of ultraviolet light, carry out photocatalysis oxidation reaction, generate nitric acid and sulfuric acid, remove SO
2And NO
XPoisonous gas.
2. method according to claim 1 is characterized in that described isolating active layer is porous ceramics, stainless steel sintered body or porous alloy film; Photocatalytic activity layer material is the TiO of isolating active laminar surface sintering
2Or the TiO that mixes
2Porous membrane.
3 methods according to claim 2 is characterized in that described photocatalytic activity layer is Detitanium-ore-type TiO
2Or N doping type Detitanium-ore-type TiO
2, the thickness of photocatalytic activity layer is 100nm～30 μ m, and the aperture is 2nm～5 μ m, and porosity ranges is 30～65%; Isolating active layer aperture is 100nm～10 μ m, and porosity is 30～70%.
4. method according to claim 2 is characterized in that described N doping type Detitanium-ore-type TiO
2The doping of middle N is with TiO
2Mole be that benchmark is 0.2～6%.
5. method according to claim 1 is characterized in that described inoranic membrane form is chip, tubular type and doughnut formula; For ease of the irradiation of ultraviolet light, adopt tubular type and doughnut formula inoranic membrane time catalytic active layer at outer surface.
6. method according to claim 1 is characterized in that described moulding pressure 0.01～2MPa.
7. method according to claim 1, the renovation process that it is characterized in that having the inoranic membrane of photocatalytic activity layer and isolating active layer is: adopt the compressed air recoil to remove the solid particle that fenestra and film surface are stopped up, feed the regeneration that water vapour is used for catalyst from separating side then, reclaim nitric acid and sulfuric acid simultaneously.
8. method according to claim 7 is characterized in that used compressed-air actuated pressure is between 0.2～2MPa.
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|---|---|---|---|
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| CN102908883A (en) * | 2012-09-27 | 2013-02-06 | 北京大学 | Method for simultaneously desulfurizing and denitrating flue gas |
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| CN104828926A (en) * | 2015-04-17 | 2015-08-12 | 中国科学院生态环境研究中心 | Wastewater advanced treatment equipment and method for catalytic ozonation membrane reactor |
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| CN1218634C (en) * | 2002-04-30 | 2005-09-14 | 香港中文大学 | Method of preparing mesoporous titanium dioxide film with high disinfecting photoactivity |
| EP1693482A4 (en) * | 2003-12-09 | 2008-04-30 | Asahi Glass Co Ltd | Ti OXIDE FILM EXHIBITING PHOTOCATALYTIC ACTIVITY UPON VISIBLE LIGHT IRRADIATION AND PROCESS FOR PRODUCING THE SAME |
| CN1843575B (en) * | 2006-03-29 | 2012-07-04 | 华北电力大学 | Method and apparatus for optic catalytic oxidizing, desulfurizing and denitrifying flue gas simultaneously |
| US8309484B2 (en) * | 2006-06-01 | 2012-11-13 | Carrier Corporation | Preparation and manufacture of an overlayer for deactivation resistant photocatalysts |
| CN100534586C (en) * | 2007-02-09 | 2009-09-02 | 浙江大学 | Flue gas combined desulfurization and denitration method |
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2008
- 2008-07-11 CN CN2008101232871A patent/CN101322903B/en active Active
Cited By (7)
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| CN101837233A (en) * | 2010-05-11 | 2010-09-22 | 华北电力大学（保定） | System for recycling SO2 and NO from oxygen-enriched combustion boiler fume CO2 collection |
| CN102434253A (en) * | 2011-09-29 | 2012-05-02 | 华北电力大学 | Tertiary treatment device of automobile exhaust and separation method thereof |
| CN102434253B (en) * | 2011-09-29 | 2014-04-16 | 华北电力大学 | Tertiary treatment device of automobile exhaust and separation method thereof |
| CN102908883A (en) * | 2012-09-27 | 2013-02-06 | 北京大学 | Method for simultaneously desulfurizing and denitrating flue gas |
| CN102908883B (en) * | 2012-09-27 | 2015-07-29 | 北京大学 | A kind of flue gas and desulfurizing and denitrifying method |
| CN103752167A (en) * | 2014-01-26 | 2014-04-30 | 北京诺曼斯佰环保科技有限公司 | Purifying tower and deep smoke purifying system |
| CN104828926A (en) * | 2015-04-17 | 2015-08-12 | 中国科学院生态环境研究中心 | Wastewater advanced treatment equipment and method for catalytic ozonation membrane reactor |
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| CN101322903B (en) | 2011-07-20 |
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