CN105964244B - A kind of vanadium titanium valve and the preparation method and application thereof being suitable for repeatedly regeneration denitrating catalyst - Google Patents

A kind of vanadium titanium valve and the preparation method and application thereof being suitable for repeatedly regeneration denitrating catalyst Download PDF

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CN105964244B
CN105964244B CN201610299785.6A CN201610299785A CN105964244B CN 105964244 B CN105964244 B CN 105964244B CN 201610299785 A CN201610299785 A CN 201610299785A CN 105964244 B CN105964244 B CN 105964244B
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vanadium titanium
titanium valve
denitrating catalyst
repeatedly
preparation
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CN105964244A (en
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黄力
王虎
李倩
王晓伟
纵宇浩
陈志平
董晓真
张捷
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Datang Nanjing Environmental Protection Technology Co Ltd
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    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/32—Manganese, technetium or rhenium
    • B01J23/34—Manganese
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    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/88—Molybdenum
    • B01J23/887—Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
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    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/90—Regeneration or reactivation
    • B01J23/92—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
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    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
    • B01J38/485—Impregnating or reimpregnating with, or deposition of metal compounds or catalytically active elements
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    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
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    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
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    • B01J2523/00—Constitutive chemical elements of heterogeneous catalysts

Abstract

The invention discloses a kind of vanadium titanium valves and the preparation method and application thereof being suitable for repeatedly regeneration denitrating catalyst, and the acetylacetonate of rare earth metal is dissolved in organic solvent, and organic titanic compound and organic vfanadium compound is added, and stirring forms mixed solution；Mixed solution is injected into stainless steel reactor, is reacted in high temperature stainless steel reactor and forms powder, with collecting tank is entered after gaseous mixture outflow reactor, obtains being suitable for the vanadium titanium valve for repeatedly regenerating denitrating catalyst after cooling.The m of the specific surface area of gained vanadium titanium valve >=3002/ g, by TiO2Mass Calculation, V2O5Mass percent with rare-earth oxide is respectively 0.1 ~ 10wt% and 0.01 ~ 5wt%.The vanadium titanium valve large specific surface area of the present invention, thermal stability height, V2O5Dispersion degree it is high, V2O5And TiO2Between effect it is strong, the denitrating catalyst further prepared has the advantages that high, the active wide opening of denitration efficiency is wide, and can effectively reduce V of the catalyst in wet-cleaning regenerative process and be lost in.

Description

It is a kind of be suitable for repeatedly vanadium titanium valve and preparation method thereof of regeneration denitrating catalyst with Using
Technical field
The present invention relates to selective catalytic reduction catalysts technical fields, and in particular to one kind being suitable for repeatedly regeneration denitration Vanadium titanium valve of catalyst and the preparation method and application thereof.
Background technology
Selective catalytic reduction (SCR) technology denitration efficiency is high, floor space is small, reliable for operation, is to be most widely used NOxEmission control technique.As the core of SCR technology, commercial SCR denitration is mainly vanadium Titanium series catalyst, with Detitanium-ore-type TiO2For carrier, V2O5For active component.However, Detitanium-ore-type TiO2Specific surface area is small, and thermal stability is poor, in height It in warm flue gas environment, is easy to be changed into Rutile Type, the denitration efficiency of denitrating catalyst is caused to decline.Therefore, specific surface is prepared The catalyst that product is big, temperature wide opening is wide, denitration efficiency is good also becomes the research hotspot of each high-power station and research institutions.In recent years, Disclosed in this field there are many method, as CN105126813A, CN103894184A, CN101318697A, CN102755887B etc..
It is influenced by many factors such as flying dust blocking, alkali metal (K, Na) poisoning, heavy metal (As, Pb) poisonings, denitration is urged Agent will inactivate after running a period of time.It needs to carry out regeneration treatment to denitrating catalyst at that time, more universal at present Denitrating catalyst regeneration method is chemical cleaning, for its specific deactivation cause, will be catalyzed that is, by after denitrating catalyst dedusting Agent is immersed in acid solution or lye, to remove the toxicant on its surface.As CN102059156A, CN102658215B, CN104826669A, CN102974368B, US7858549B2, US7569506B2 etc..However, pickling/alkaline cleaning procedure all can not It with degree causes the loss of denitrating catalyst active component, therefore, after the cleaning of catalyst, needs again by impregnating again Mode supplements a part of active component on catalyst, but can increase process and discharge of wastewater.
Invention content
The present invention provides a kind of vanadium titanium valve and the preparation method and application thereof being suitable for repeatedly regeneration denitrating catalyst, passes through A kind of large specific surface area, V is prepared in preparation method using the present invention2O5Dispersion degree it is high, the high vanadium titanium valve of thermal stability. When further preparing SCR denitration using this vanadium titanium valve, the catalyst denitration efficiency of gained is high, temperature window mouth width.Also, Most of all, after carrying out wet reclamation processing to denitrating catalyst, the V turnover rates of catalyst are low, it is possible to reduce subsequent Impregnation steps are supplemented, regeneration flow is simplified.
To achieve the goals above, the technological means that the present invention uses for：
A kind of preparation method being suitable for the repeatedly vanadium titanium valve of regeneration denitrating catalyst, comprises the steps of：
1) acetylacetonate of rare earth metal is dissolved in organic solvent, organic titanic compound and organic vanadium chemical combination is added Object, stirring form mixed solution；
2) stainless steel reactor blank pipe is packed into tube furnace, is passed through the gaseous mixture of inert gas and oxygen, it is heated to 500 ~ 900 DEG C, wherein residence time of the gaseous mixture in reactor is 5 ~ 90s, and the percentage by volume of oxygen is 5 ~ 30% in gaseous mixture；
3）By step 1）Obtained mixed solution is injected into stainless steel reactor, is reacted in high temperature stainless steel reactor Powder is formed, with collecting tank is entered after mixture gas outflow reactor, the de- suitable for repeatedly regeneration of the present invention is obtained after cooling The vanadium titanium valve of nitre denitrating catalyst, wherein mixed solution reaction time in high temperature stainless steel reactor is gaseous mixture anti- Answer the residence time in device.
Organic titanic compound described in step 1) is tetraethyl titanate, tetraisopropyl titanate, four n-propyl of metatitanic acid, metatitanic acid four One kind in butyl ester.
The acetylacetonate of rare earth metal described in step 1) is in acetylacetone,2,4-pentanedione cerium, lanthanum acetylacetone, acetylacetone,2,4-pentanedione yttrium One kind.
Step 1) organic vfanadium compound is in three propyl alcohol vanadium oxides, Triisopropoxyvanadium(V) oxide, oxidation triethoxy vanadium It is a kind of.
Step 1) the organic solvent be N,N-dimethylformamide, methanol, ethyl alcohol, acetic acid, benzene, toluene, ethyl acetate, One kind in carbon tetrachloride, chloroform, dimethyl sulfoxide.
Step 2) the inert gas is one kind in nitrogen, helium, argon gas.
The vanadium titanium valve crystal grain suitable for repeatedly regeneration denitrating catalyst that above-mentioned preparation method is prepared is small, specific surface area Greatly, V2O5Dispersion degree it is high, and V2O5And TiO2Between effect it is strong.
The m of the specific surface area of the vanadium titanium valve >=3002/g.By TiO2Mass Calculation, V2O5With rare-earth oxide Mass percent is respectively 0.1 ~ 5wt% and 0.1 ~ 2wt%, preferably 0.5 ~ 5wt% and 0.1 ~ 2wt%.
The vanadium titanium valve further prepares SCR denitration after cooling.Coagent is first introduced, including but not limited to W, one or more of Mo, Cr, Sn, Cu, Mn, Co, Fe.Again after molding, drying, roasting, denitrating catalyst is obtained.
The denitrating catalyst is board-like, corrugated plate dst or honeycomb fashion.
After the denitrating catalyst long-play inactivation, regeneration treatment is carried out.Main flow is that ash disposal-analysis inactivation is former Cause-formulation regeneration scheme-wet-cleaning-impregnates again-is dried, is roasted.
Soot blowing technology well known in the art may be used to remove the dust stratification in catalyst surface and duct in ash disposal, including but It is not limited to the conventional means such as compressed air purging, high pressure water washing, the aspiration of negative pressure.
Wet-cleaning remove catalyst on toxicant main method include but not limited to alkaline solution (NaOH, KOH、Na2CO3、NaHCO3、NH3·H2O etc.) it cleans, (H in acid solution2SO4、HCl、HNO3, organic acid etc.) cleaning, Strong oxdiative Object solution (hypochlorous acid, hydrogen peroxide etc.) cleans, and deionized water is cleaned by ultrasonic.A kind of common wet scrubbing method introduced below：
Catalyst is impregnated in KOH aqueous solutions first, 25 ~ 80 DEG C, 0.1 ~ 1h.It is impregnated in H again2SO4In aqueous solution, 25 ~ 80 DEG C, 0.1 ~ 1h.It is washed with deionized again 1 ~ 3 time, 1 ~ 6h is roasted in 450 ~ 550 DEG C after drying.
Advantageous effect
(1) the vanadium titanium valve crystal grain that prepared by the method for the present invention is small, large specific surface area, V2O5Dispersion degree it is high, and V2O5And TiO2 Between effect it is strong.Using the denitrating catalyst prepared by vanadium titanium valve in the present invention, reducing property is strong, and denitration performance is excellent.
(2) vanadium titanium valve prepared by the method for the present invention, thermal stability are high.Also, the rare-earth oxide of high degree of dispersion, It further suppresses in high-temperature flue gas environment, TiO2Changed from anatase to Rutile Type.It is made using vanadium titanium valve in the present invention Standby denitrating catalyst can still keep higher denitration activity at high temperature.
(3) vanadium titanium valve prepared by the method for the present invention, V2O5, rare-earth oxide and TiO2Between binding force it is strong, production Raw synergistic effect can further increase the denitration performance of denitrating catalyst.
(4) made using vanadium titanium valve in the method for the present invention compared to the vanadium titanium system denitrating catalyst prepared by conventional method Standby denitrating catalyst, after wet reclamation, the active component V turnover rates of catalyst are low.
Specific implementation mode
Following embodiment is the further explanation given to the present invention by the selective catalytic denitrification process reaction, rather than to this hair Bright limitation.
Embodiment 1
It is prepared by vanadium titanium valve：38g acetylacetone,2,4-pentanedione ceriums are dissolved in the n,N-Dimethylformamide of 1 L, 4.5 L metatitanic acids four are added Tri- propyl alcohol vanadium oxide of butyl ester and 40 mL, stirring form mixed solution；
Stainless steel reactor blank pipe is packed into tube furnace, the gaseous mixture of nitrogen and oxygen is passed through, is heated to 900 DEG C, wherein Residence time of the gaseous mixture in reactor is 5s, and the percentage by volume of oxygen is 30% in gaseous mixture；Using constant-flux pump, will mix It closes solution to be injected into stainless steel reactor, liquid reacts in high temperature stainless steel reactor forms powder, with gaseous mixture air-flow Enter collecting tank after outflow reactor, vanadium titanium valve is obtained after cooling.The specific surface area of the vanadium titanium valve of gained is 315 m2/ g, wherein By TiO2Mass Calculation, V2O5Mass percent with rare-earth oxide is respectively 1.4wt% and 1.3wt%.
By vanadium titanium valve (315 m of specific surface area2/ g) it is mixed with the oxalic acid solution of ammonium heptamolybdate, it stirs, adds manganese nitrate Aqueous solution, hydroxyethyl cellulose, clay and glass fibre after kneading is uniform, are coated on stainless steel steel mesh.It is dry at 60 DEG C Plate-type denitration catalyst is made under 510 DEG C of air atmospheres after roasting 2h in 4h.Wherein, with TiO2Mass Calculation, addition The mass percent of hydroxyethyl cellulose, clay and glass fibre is respectively 2wt%, 2wt% and 6wt%；MnO2And MoO3Quality Percentage is respectively 2wt% and 2.6wt%.
The evaluation of catalyst：The performance evaluation that denitrating catalyst is carried out in the fixed bed reactors in laboratory, evaluates item Part is：Flue gas face velocity (AV) is 10.55 Nm3/(m2·h)；Simulated flue gas group becomes NO a concentration of 450 ppm, NH3It is a concentration of 450 ppm, O2A concentration of 5 v%, SO2A concentration of 500 ppm, H2A concentration of 5 v% of O, remaining is N2。
Evaluation result：The denitration activity of catalyst is respectively 86.7%, 96.1% and at 360 DEG C, 380 DEG C and 410 DEG C 90.4%。
Embodiment 2
It is prepared by vanadium titanium valve：10g lanthanum acetylacetones are dissolved in 500 mL benzene, 2.65 L tetraethyl titanates and 28.5 are added ML Triisopropoxyvanadium(V) oxides, stirring form mixed solution；
Stainless steel reactor blank pipe is packed into tube furnace, the gaseous mixture of helium and oxygen is passed through, is heated to 800 DEG C, wherein Residence time of the gaseous mixture in reactor is 15s, and the percentage by volume of oxygen is 20% in gaseous mixture；Using constant-flux pump, will mix It closes liquid to be injected into stainless steel reactor, liquid reacts in high temperature stainless steel reactor forms powder, flows out with mixture gas Enter collecting tank after reactor, vanadium titanium valve is obtained after cooling.The specific surface area of gained vanadium titanium valve is 328 m2/ g, wherein press TiO2's Mass Calculation, V2O5Mass percent with rare-earth oxide is respectively 1.0wt% and 1.0wt%.
By vanadium titanium valve (328 m of specific surface area2/ g), copper acetate, methylcellulose and ammonium paratungstate after mixing, be added Ammonium hydroxide, polyvinyl alcohol, glycerine and stearic acid, after kneading is uniform, pre-extruded is then allowed to stand ageing for 24 hours.Extrusion molding again, in 60 4h is dried at DEG C, and honeycomb type denitrification catalyst is made after roasting 2h under 550 DEG C of air atmospheres.Wherein, with TiO2Mass Calculation, Methylcellulose, polyvinyl alcohol, glycerine and the stearic mass percent of addition are respectively 8wt%, 5wt%, 3wt% and 2wt%； CuO and WO3Mass percent be respectively 3wt% and 4.2wt%.
The evaluation of catalyst is the same as embodiment 1.
Evaluation result：The denitration activity of catalyst is respectively 90.2%, 98.4% and at 360 DEG C, 380 DEG C and 410 DEG C 92.6%。
Embodiment 3
It is prepared by vanadium titanium valve：30g acetylacetone,2,4-pentanedione yttriums are dissolved in 800 mL chloroforms, 4 L metatitanic acids, four n-propyl and 20 mL are added Triethoxy vanadium is aoxidized, stirring forms mixed solution；
Stainless steel reactor blank pipe is packed into tube furnace, the gaseous mixture of argon gas and oxygen is passed through, is heated to 500 DEG C, wherein Residence time of the gaseous mixture in reactor is 90s, and the percentage by volume of oxygen is 5% in gaseous mixture；Using constant-flux pump, will mix It closes liquid to be injected into stainless steel reactor, liquid reacts in high temperature stainless steel reactor forms powder, flows out with mixture gas Enter collecting tank after reactor, vanadium titanium valve is obtained after cooling.The specific surface area of the vanadium titanium valve of gained is 300 m2/ g, wherein press TiO2 Mass Calculation, V2O5Mass percent with rare-earth oxide is respectively 0.5wt% and 2.0wt%.
By vanadium titanium valve (300 m of specific surface area2/ g), chromic nitrate, ammonium paratungstate after mixing, be added oxalic acid solution, stir It mixes uniformly, glass corrugated plating is immersed in mixed liquor, the dry 4h at 60 DEG C.Glass corrugated plating after drying is impregnated again In mixed liquor, dry 4h, then roasts 2h under 550 DEG C of air atmospheres again at 60 DEG C, and corrugated plate dst denitrating catalyst is made. Wherein, with TiO2Mass Calculation, Cr2O3And WO3Mass percent be respectively 1.5wt% and 4.2wt%.
The evaluation of catalyst is the same as embodiment 1.
Evaluation result：The denitration activity of catalyst is respectively 82.8%, 90.9% and at 360 DEG C, 380 DEG C and 410 DEG C 82.5%。
Embodiment 4
It is prepared by vanadium titanium valve：1.5 g lanthanum acetylacetones are dissolved in 400 mL ethyl alcohol, 4 L tetraisopropyl titanates and 150 are added Tri- propyl alcohol vanadium oxides of mL, stirring form mixed solution；
Stainless steel reactor blank pipe is packed into tube furnace, the gaseous mixture of nitrogen and oxygen is passed through, is heated to 650 DEG C, wherein Residence time of the gaseous mixture in reactor is 60s, and the percentage by volume of oxygen is 15% in gaseous mixture；Using constant-flux pump, will mix It closes liquid to be injected into stainless steel reactor, liquid reacts in high temperature stainless steel reactor forms powder, flows out with mixture gas Enter collecting tank after reactor, vanadium titanium valve is obtained after cooling.The specific surface area of obtained vanadium titanium valve is 302 m2/ g, wherein press TiO2 Mass Calculation, V2O5Mass percent with rare-earth oxide is respectively 5wt% and 0.1wt%；
By vanadium titanium valve (302 m of specific surface area2/ g) it is mixed with the oxalic acid solution of ammonium heptamolybdate, it stirs, adds cobalt nitrate Aqueous solution, hydroxyethyl cellulose, clay and glass fibre after kneading is uniform, are coated on stainless steel steel mesh.It is dry at 60 DEG C Plate-type denitration catalyst is made under 510 DEG C of air atmospheres after roasting 2h in 4h.Wherein, with TiO2Mass Calculation, addition The mass percent of hydroxyethyl cellulose, clay and glass fibre is respectively 2wt%, 2wt% and 6wt%；CoO and MoO3Quality Percentage is respectively 5wt% and 2.6wt%.
The evaluation of catalyst is the same as embodiment 1.
Evaluation result：The denitration activity of catalyst is respectively 83.3%, 91.7% and at 360 DEG C, 380 DEG C and 410 DEG C 83.5%。
Comparative example 1
Use business Detitanium-ore-type TiO2, 80 ~ 150 m of specific surface area2/g.By TiO2With ammonium metavanadate, the grass of ammonium heptamolybdate Acid solution mixes, and stirring adds manganese nitrate aqueous solution, hydroxyethyl cellulose, clay and glass fibre, after kneading is uniform, applies It is overlying on stainless steel steel mesh.4h is dried at 60 DEG C, and Plate-type denitration catalyst is made after roasting 2h under 510 DEG C of air atmospheres. Wherein, with TiO2Mass Calculation, the mass percent of the hydroxyethyl cellulose of addition, clay and glass fibre is respectively 2wt%, 2wt% and 6wt%；V2O5、MnO2And MoO3Mass percent be respectively 1.4 wt%, 2wt% and 2.6wt%.
The evaluation of catalyst is the same as embodiment 1.
Evaluation result：The denitration activity of catalyst is respectively 81.2%, 90.1% and at 360 DEG C, 380 DEG C and 410 DEG C 77.3%。
Comparative example 2
Use business Detitanium-ore-type TiO2, 80 ~ 150 m of specific surface area2/g.By TiO2, methylcellulose, copper acetate with it is secondary After mixing, the ammonia spirit of ammonium metavanadate is added in ammonium tungstate, adds polyvinyl alcohol, glycerine and stearic acid, and kneading is uniform Afterwards, pre-extruded is then allowed to stand ageing for 24 hours.4h is dried in extrusion molding again at 60 DEG C, after roasting 2h under 550 DEG C of air atmospheres, system Obtain honeycomb type denitrification catalyst.Wherein, with TiO2Mass Calculation, methylcellulose, polyvinyl alcohol, glycerine and the tristearin of addition The mass percent of acid is respectively 8wt%, 5wt%, 3wt% and 2wt%；V2O5, CuO and WO3Mass percent be respectively 1.0wt%, 3wt% and 4.2wt%.
The evaluation of catalyst is the same as embodiment 1.
Evaluation result：The denitration activity of catalyst is respectively 80.0%, 91.2% and at 360 DEG C, 380 DEG C and 410 DEG C 75.4%。
Wet-cleaning is carried out to the denitrating catalyst prepared by embodiment 1 ~ 4 and comparative example 1 ~ 2, simulates catalyst again Raw process investigates influence of the wet-cleaning to active component V.
Catalyst is impregnated in the KOH aqueous solutions of 3 wt% first, 60 DEG C, 1.5h.It is impregnated in the H of 2 wt% again2SO4Water In solution, 60 DEG C, 1h.Deionized water is washed 1 ~ 3 time afterwards, 80 DEG C of drying, 500 DEG C of roasting 2h.The V wastages of denitrating catalyst As shown in table 1.
The loss degree of V after the different denitrating catalyst wet-cleanings of table 1
Catalyst V turnover rates/%
Comparative example 1 61.2
Comparative example 2 48.3
Embodiment 1 2.3
Embodiment 2 1.1
Embodiment 3 10.4
Embodiment 4 8.2

Claims (10)

1. a kind of preparation method being suitable for the repeatedly vanadium titanium valve of regeneration denitrating catalyst, which is characterized in that comprise the steps of：
1) acetylacetonate of rare earth metal is dissolved in organic solvent, organic titanic compound and organic vfanadium compound is added, stirs It mixes, forms mixed solution；
2) stainless steel reactor blank pipe is packed into tube furnace, is passed through the gaseous mixture of inert gas and oxygen, is heated to 500 ~ 900 DEG C, wherein residence time of the gaseous mixture in reactor is 5 ~ 90s, and the percentage by volume of oxygen is 5 ~ 30% in gaseous mixture；
3）By step 1）Obtained mixed solution is injected into stainless steel reactor, is reacted and is formed in high temperature stainless steel reactor Powder obtains being suitable for the vanadium titanium of repeatedly regeneration denitrating catalyst with collecting tank is entered after gaseous mixture outflow reactor after cooling Powder.
2. a kind of preparation method being suitable for the repeatedly vanadium titanium valve of regeneration denitrating catalyst according to claim 1, special Sign is that organic titanic compound described in step 1) is tetraethyl titanate, tetraisopropyl titanate, four n-propyl of metatitanic acid, metatitanic acid four One kind in butyl ester.
3. a kind of preparation method being suitable for the repeatedly vanadium titanium valve of regeneration denitrating catalyst according to claim 1, special Sign is that the acetylacetonate of rare earth metal described in step 1) is in acetylacetone,2,4-pentanedione cerium, lanthanum acetylacetone, acetylacetone,2,4-pentanedione yttrium It is a kind of.
4. a kind of preparation method being suitable for the repeatedly vanadium titanium valve of regeneration denitrating catalyst according to claim 1, special Sign is that organic solvent described in step 1) is n,N-Dimethylformamide, methanol, ethyl alcohol, acetic acid, benzene, toluene, acetic acid second One kind in ester, carbon tetrachloride, chloroform, dimethyl sulfoxide.
5. a kind of preparation method being suitable for the repeatedly vanadium titanium valve of regeneration denitrating catalyst according to claim 1, special Sign is that organic vfanadium compound described in step 1) is in three propyl alcohol vanadium oxides, Triisopropoxyvanadium(V) oxide, oxidation triethoxy vanadium It is a kind of.
6. a kind of preparation method being suitable for the repeatedly vanadium titanium valve of regeneration denitrating catalyst according to claim 1, special Sign is that inert gas described in step 2) is one kind in nitrogen, helium, argon gas.
7. what any one of claim 1 ~ 6 preparation method was prepared is suitable for the vanadium titanium of repeatedly regeneration denitrating catalyst Powder, which is characterized in that the m of the specific surface area of vanadium titanium valve >=3002/g。
8. the vanadium titanium valve according to claim 7 for being suitable for repeatedly regeneration denitrating catalyst, which is characterized in that press TiO2's Mass Calculation, V2O5Mass percent with rare-earth oxide is respectively 0.1 ~ 10wt% and 0.01 ~ 5wt%.
9. the vanadium titanium valve according to claim 8 for being suitable for repeatedly regeneration denitrating catalyst, which is characterized in that press TiO2's Mass Calculation, V2O5Mass percent with rare-earth oxide is respectively 0.5 ~ 5wt% and 0.1 ~ 2wt%.
10. application of the vanadium titanium valve in preparing SCR denitration described in claim 7.
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