CN107537545A - A kind of preparation method and application of high vanadium catalyst - Google Patents
A kind of preparation method and application of high vanadium catalyst Download PDFInfo
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Abstract
The invention discloses a kind of preparation method and application of high vanadium catalyst, comprise the following steps：Step S1, weigh nanometer titanium dioxide, adhesive, molecular sieve, water and be stirred until homogeneous；Step S2, by mixture extrusion molding in extruder obtained by step S1, calcining obtains base substrate；Step S3, weighs silicon-dioxide powdery, organic binder bond, methanol, water and adds in blender and be uniformly mixing to obtain maceration extract A, and by above-mentioned base substrate, dipping is multiple repeatedly in maceration extract A, is calcined after the completion of dipping；Step S4, weigh in nanometer titanium dioxide, ammonium metavanadate, ammonium tungstate, water, monoethanolamine or Tween 80 addition blender and be uniformly mixing to obtain maceration extract B, dipping is multiple repeatedly in maceration extract B for the base substrate after above-mentioned dipping is calcined, and calcines and produces after the completion of dipping；Wherein, the high vanadium refers to V2O5Quality accounts for the 10 15% of catalyst quality.The inventive method can must be molded high vanadium catalyst, the abrasion resistance properties and flue gas denitration catalyst excellent performance of gained catalyst.
Description
Technical field
The invention belongs to catalyst field, is related to high vanadium catalyst, and in particular to a kind of preparation method of high vanadium catalyst
And application.
Background technology
Pollution problems of the NOx to atmospheric environment has become global environmental problem, and 90% NOx emission is come in city
From in the fuel combustion of the mankind.The most NOx emission in China comes from the burning of stationary source, wherein based on coal-burning power plant.
The most generating in China at present uses coal, and for fuel, compared to coal fired power generation, fuel gas generation is due to clean and effective, it has also become I
The important power generation type of state's rapid growth.Compared to coal fired power generation, fuel gas generation more cleans, because fuel characteristic is different, combustion gas
The discharge of nitrogen oxides need to only be paid close attention to by generating electricity.But partial fuel coal implementation in power plant minimum discharge in recent years is transformed, improved row
Zoom level causes to challenge to the environment-friendly advantage of plant gas.
SCR technology (SCR) is that current coal-burning power plant is most widely used and maximally effective for removing cigarette
The gas denitrifying technology of nitrogen oxides in gas.Catalyst is the core of SCR technology, and domestic current is applied to coal-fired flue-gas at present
The catalyst of denitration is the catalyst of vanadium tungsten titanium system mostly, with TiO2For carrier, V2O5For active component, WO3It is overall for auxiliary agent
Formula catalyst is after mixing active component, carrier, adhesive, pore creating material and other auxiliary agents etc., by kneading-pugging-old-
Extrusion-drying-roasting-cutting, is finally molded, and the molding mode that basic cellular catalyst all uses is overall mixing extrusion
Formula.At present in overall mixing extrusion type honeycomb catalyst, TiO2Account for more than 85%, WO3Account for 5% or so, V2O54% or so is accounted for, its
Middle content of vanadium is low, because higher content of vanadium can influence the extrusion molding of catalyst, so as to be unfavorable for the production of catalyst,
But there are some researches show as V in catalyst2O5When content is less than 6.6%, increase V2O5Content can improve the work of catalyst
Property.This means in low SO2/SO3In the case of conversion ratio, increase V2O5Content, the use of raw material can be reduced, so as to
Improve the denitration efficiency of catalyst.
The catalyst for denitrating flue gas that domestic plant gas uses at present relies on import substantially, or directly indiscriminately imitates coal-burning power plant
Catalyst for denitrating flue gas.The characteristics of compared to coal combustion catalyst combustion gas flue gas, flue gas caused by gas turbine is more clean, contains
Dust quantity is substantially less than coal-fired flue-gas.Therefore catalyst can use small-bore, the monoblock type knot of high geometry specific surface area in the design
Structure；SO in flue gas caused by gas turbine2Content is extremely low, thus without considering because of catalyst SO2Oxidation to catalyst from
The problems such as body and downstream component, flue cause clog.It is to reduce because of SO in coal-fired flue gas denitration2Danger caused by oxidation
Evil, frequently with active component (such as V in limiting catalyst2O5) content mode, also reduce catalyst accordingly to nitrogen in flue gas
The activity of conversion of oxide.And the formula adjustment of adaptability can then be carried out by being directed to combustion gas flue gas condition, improve active component and contain
Amount, so as to lift the reactivity of catalyst.Therefore the characteristics of present invention will combine gas burning waste heat boiler flue gas, by improving vanadium
Load capacity, change conventional cellular catalyst and integrally mix the preparation technology of extrusion molding, prepare and a kind of be applied to combustion gas
The high activity denitrating catalyst of power-plant flue gas condition.
The patent of Patent No. 201210148459.7 proposes a kind of honeycomb type denitrification catalyst and preparation method thereof, should
Invention is prepared with high efficiency, resisted by changing carrier, active component and the active component of catalyst and the weight ratio of carrier
The honeycomb type denitrification catalyst module of poisoning, high temperature resistant and good mechanical strength.The patent of Patent No. 201510660002.8
High-specific surface area honeycomb type denitrification catalyst and preparation method thereof is proposed, by titanium tungsten silica flour 70-75%, vanadium 0.2-0.4%, wood
Cotton 3-5%, glass fibre 5.5-5.7%, ammoniacal liquor 6-7%, deionized water 10-11%, glue 0.4-0.6%；By material rate
After outfit, it is kneaded as pug, is made up of the monolithic extruded shaping of mould.Catalyst prepared by the invention has higher ratio surface
Product, antiwear property is strong, and mechanical life is strong, superfine Ti O2It is activity stabilized for base material；Special formulation designs, and anti-poisoning capability is excellent
Different, use range is broad, and reliability is high.The patent of Patent No. 201410839516.5 proposes a kind of SCR denitration
Maceration extract and preparation method thereof is regenerated, this method has invented a kind of SCR denitration regeneration maceration extract, including cleaning maceration extract
With active maceration extract；The cleaning maceration extract includes the component of following mass percent：Surfactant 0.5~1.0%, micropore
Penetration enhancer 0.5~1.0%, basic organic salts 2~5%, the deionized water of surplus；The active maceration extract includes following matter
Measure the component of percentage：Ammonium metavanadate 0.2~1.8%, ammonium tungstate 6~8%, manganese nitrate 3~4%, weak acid 12~18%, surplus
Deionized water.A kind of SCR denitration regeneration maceration extract described in the invention, can reply the denitrating catalyst of inactivation
Activity, prevents waste denitration catalyst from producing secondary pollution, the denitrating catalyst after regeneration to environment, and its denitration rate can reach
85~92%.
Patent No. 102773090A patent proposes WO3The integral honeycomb formula rabbit small catalyst of new adding technology and
Its preparation method, it is made up of following composition：WO34~8%, V2O51~1.5%, TiO280.5~90%, adhesive 5~10%；
WO3Added with precursor solution in the process of catalyst mixing pugging.Catalyst feed is made later by basis, dryer section
Honeycomb type denitrification catalyst.The catalyst has good chemical stability, heat endurance and anti-SO2Oxidability, it is demonstrated by
Higher denitration activity and wider active temperature windows；High, excellent catalytic effect etc. with specific surface area height, chemical mobility of the surface
Advantage.
The new invention that Patent No. CN106732639A patent proposes a kind of denitrating catalyst and preparation method thereof is special
Profit, its preparation method include：The precipitation mixture of titanium hydroxide and aluminium hydroxide is prepared；Precipitation mixture is dried
Box is calcined, and obtains TiO2-Al2O3Composite oxide carrier powder；By TiO2-Al2O3Composite oxide carrier powder and activated carbon
Powder, enamel powder and binding agent carry out extrusion molding, sizing and drying, obtain activated carbon/TiO2-Al2O3Composite catalyst；
Ammonium metatungstate, ammonium metavanadate are dissolved in oxalic acid, obtain the first maceration extract；By activated carbon/TiO2-Al2O3Composite catalyst exists
Impregnated in first maceration extract, obtain V2O5-WO3/ activated carbon/TiO2-Al2O3Composite catalyst；The second dipping is prepared
Liquid；And by V2O5-WO3/ activated carbon/TiO2-Al2O3Composite catalyst is impregnated in the second maceration extract, is obtained denitration and is urged
Agent.Catalyst made from this method has higher denitration activity, and wearability and acid resistance are strong, active wide temperature region and can be
Waste heat recovery is carried out while carrying out denitration process to pending flue gas.
Patent No. CN104307507A patent proposes a kind of preparation of high content of vanadium honeycomb fashion SCR denitration
Method, a kind of preparation method of high vanadium SCR denitration containing honeycomb fashion of the disclosure of the invention.Including sampling, prepare forward and backward
V2O5Content detection, pore volume detection, impregnation concentration calculate, and prepare maceration extract, catalyst dipping.The present invention uses catalyst
Inwall detects V2O5Content, addition catalyst active ingredient can be impregnated by fixed quantity and prepares high content of vanadium honeycomb fashion SCR denitration
Catalyst, using the further simplification detection method of the inventive method, preparation process is optimized, improves efficiency.
For the tradition extrusion cellular catalyst applied in the market, the present invention is by improving V in catalyst2O5
Content (is improved to 10~15%) by 4%, and traditional overall mixing extruded type is changed into impregnated preparation technology, is prepared
Between 340~450 DEG C of catalyst Gas Generator Set, denitration activity can reach 90% or so, and with necessarily wear-resistant and anti-
Poisoning capability.
The content of the invention
V in known raising catalyst2O5Content can improve the denitration efficiency of catalyst, but prepare contain in the prior art
The defects of respective be present in the two methods of vanadium catalyst：Overall mixing extrusion molding is not suitable for the preparation of high vanadium catalyst, because
For content of vanadium it is too high can not extrusion molding, be suitable for prepare V2O5Content is 4% or so vanadium containing catalystses；Although infusion process
It can be used for preparing high vanadium catalyst, but abrasion resistance properties are poor, the V on surface2O5Content is easily lost because of abrasion.Therefore,
A kind of the defects of it is an object of the invention to overcome prior art, there is provided preparation method and application of high vanadium catalyst.
The above-mentioned purpose of the present invention is achieved by following technical scheme：
A kind of preparation method of high vanadium catalyst, comprises the following steps：
Step S1, weigh nanometer titanium dioxide 65-75 parts by weight, adhesive 4-6 parts, molecular sieve 20-30 parts add it is mixed
Stirred in clutch, add water 80-100 parts and continue to be stirred until homogeneous；
Step S2, by mixture extrusion molding in extruder obtained by step S1,250~450 DEG C of calcinings obtain for 3~5 hours
To base substrate；
Step S3, silicon-dioxide powdery 74-76 parts, organic binder bond 16-20 parts, methanol 6-8 parts, water are weighed by weight
160-180 parts add in blender and are uniformly mixing to obtain maceration extract A, and by above-mentioned base substrate, dipping is multiple repeatedly in maceration extract A, leaching
Stain is completed to calcine 0.5-1.5 hours after 90-110 DEG C；
Step S4, nanometer titanium dioxide 75-85 parts, ammonium metavanadate 7-9 parts, ammonium tungstate 10-14 parts, water are weighed by weight
140-160 parts, monoethanolamine 6-10 parts or Tween 80 12-16 parts add in blender and are uniformly mixing to obtain maceration extract B, by above-mentioned leaching
Base substrate after stain is calcined impregnates repeatedly repeatedly in maceration extract B, and dipping completion is after 90-110 DEG C of calcining 0.5-1.5 hour
；
Wherein, the high vanadium refers to V2O5Quality accounts for the 10-15% of catalyst quality.
Preferably, 70 parts of nanometer titanium dioxide, 5 parts of adhesive, 25 parts of molecular sieve are weighed in step S1 by weight to be mixed
Close, add 90 parts of water and continue to be stirred until homogeneous.
Preferably, described adhesive is silica sol binder.
Preferably, the molecular sieve is zeolite molecular sieve.
Preferably, 75 parts of silicon-dioxide powdery, 18 parts of organic binder bond, 7 parts of methanol, water are weighed in step S3 by weight
Maceration extract A is uniformly mixing to obtain in 170 parts of addition blenders.
Preferably, organic binder bond is PVA organic binder bonds.
Preferably, catalyst base substrate is impregnated 3 times repeatedly in maceration extract A in step S3, each dip time is 3-5
Second；Dipping is completed to calcine 1 hour after 100 DEG C.
Preferably, 80 parts of nanometer titanium dioxide, 8 parts of ammonium metavanadate, 12 parts of ammonium tungstate, water are weighed in step S4 by weight
150 parts, be uniformly mixing to obtain maceration extract B in 14 parts of addition blenders of 8 parts of monoethanolamine or Tween 80.
Preferably, the base substrate impregnated after calcining is impregnated 3 times repeatedly in maceration extract B in step S4, each dip time
It is the 3-5 seconds；Dipping is completed to calcine 1 hour after 100 DEG C.
The high vanadium catalyst that above-mentioned preparation method is prepared is used for the purposes of plant gas denitrating flue gas.
Advantages of the present invention：
The defects of technical scheme provided by the invention overcomes prior art, shaping, high vanadium (V can be prepared2O5Quality
Account for catalyst quality and be up to 10-15%) catalyst, and abrasion resistance properties and catalytic performance are excellent, can be used for plant gas cigarette
Qi exhaustion nitre.
Brief description of the drawings
Fig. 1 is that catalysis efficiency of the catalyst as plant gas catalyst for denitrating flue gas prepared by embodiment 1-5 compares, and is surveyed
Method for testing parameter is：Flue gas GHSV (gas space velocity per hour)=30000h-1, O2Volumetric concentration 3%, denitrfying agent NH3By NO：NH3
=1：1 (mol ratio) adds, 120 DEG C of catalytic reactions 2 hours.
Embodiment
The essentiality content of the present invention is specifically introduced with reference to embodiment, but the protection model of the present invention is not limited with this
Enclose.The routine test operation that the test operation not being described in detail in experiment is well known to the skilled person.
Embodiment 1：
A kind of preparation method of high vanadium catalyst, comprises the following steps：
Step S1,70 parts of nanometer titanium dioxide, 5 parts of adhesive are weighed by weight, is stirred in 25 parts of addition blenders of molecular sieve
Mix uniformly, add 90 parts of water and continue to be stirred until homogeneous；
Step S2, by mixture extrusion molding in extruder obtained by step S1,350 DEG C of calcinings obtain base substrate in 4 hours；
Step S3,75 parts of silicon-dioxide powdery, 18 parts of organic binder bond, 7 parts of methanol, 170 parts of water are weighed by weight and is added
Enter to be uniformly mixing to obtain maceration extract A in blender, by above-mentioned base substrate, dipping is multiple repeatedly in maceration extract A, dipping complete after
100 DEG C are calcined 1 hour；
Step S4,80 parts of nanometer titanium dioxide, 8 parts of ammonium metavanadate, 12 parts of ammonium tungstate, 150 parts of water, ethanol are weighed by weight
Maceration extract B is uniformly mixing to obtain in 8 parts of addition blenders of amine, the base substrate after above-mentioned dipping is calcined soaks repeatedly in maceration extract B
Stain is multiple, and dipping is completed to produce within 1 hour after 100 DEG C of calcinings；
Adhesive is silica sol binder；Molecular sieve is zeolite molecular sieve；Organic binder bond is PVA organic binder bonds.
The catalyst of shaping, after testing, V can be prepared in the above method2O5Quality accounts for the 14% of catalyst quality.
Embodiment 2：
A kind of preparation method of high vanadium catalyst, comprises the following steps：
Step S1,65 parts of nanometer titanium dioxide, 4 parts of adhesive are weighed by weight, is stirred in 20 parts of addition blenders of molecular sieve
Mix uniformly, add 80 parts of water and continue to be stirred until homogeneous；
Step S2, by mixture extrusion molding in extruder obtained by step S1,250 DEG C of calcinings obtain base substrate in 5 hours；
Step S3,74 parts of silicon-dioxide powdery, 16 parts of organic binder bond, 6 parts of methanol, 160 parts of water are weighed by weight and is added
Enter to be uniformly mixing to obtain maceration extract A in blender, by above-mentioned base substrate, dipping is multiple repeatedly in maceration extract A, dipping complete after
90 DEG C are calcined 1.5 hours；
Step S4,75 parts of nanometer titanium dioxide, 7 parts of ammonium metavanadate, 10 parts of ammonium tungstate, 140 parts of water, ethanol are weighed by weight
Maceration extract B is uniformly mixing to obtain in 6 parts of addition blenders of amine, the base substrate after above-mentioned dipping is calcined soaks repeatedly in maceration extract B
Stain is multiple, and dipping is completed to produce within 1.5 hours after 90 DEG C of calcinings；
Adhesive is silica sol binder；Molecular sieve is zeolite molecular sieve；Organic binder bond is PVA organic binder bonds.
The catalyst of shaping, after testing, V can be prepared in the above method2O5Quality accounts for the 10% of catalyst quality.
Embodiment 3：
A kind of preparation method of high vanadium catalyst, comprises the following steps：
Step S1,75 parts of nanometer titanium dioxide, 6 parts of adhesive are weighed by weight, is stirred in 30 parts of addition blenders of molecular sieve
Mix uniformly, add 100 parts of water and continue to be stirred until homogeneous；
Step S2, by mixture extrusion molding in extruder obtained by step S1,450 DEG C of calcinings obtain base substrate in 3 hours；
Step S3,76 parts of silicon-dioxide powdery, 20 parts of organic binder bond, 8 parts of methanol, 180 parts of water are weighed by weight and is added
Enter to be uniformly mixing to obtain maceration extract A in blender, by above-mentioned base substrate, dipping is multiple repeatedly in maceration extract A, dipping complete after
110 DEG C are calcined 0.5 hour；
Step S4,85 parts of nanometer titanium dioxide, 9 parts of ammonium metavanadate, 14 parts of ammonium tungstate, 160 parts of water, ethanol are weighed by weight
Maceration extract B is uniformly mixing to obtain in 10 parts of addition blenders of amine, the base substrate after above-mentioned dipping is calcined soaks repeatedly in maceration extract B
Stain is multiple, and dipping is completed to produce within 0.5 hour after 110 DEG C of calcinings；
Adhesive is silica sol binder；Molecular sieve is zeolite molecular sieve；Organic binder bond is PVA organic binder bonds.
The catalyst of shaping, after testing, V can be prepared in the above method2O5Quality accounts for the 15% of catalyst quality.
Embodiment 4：
A kind of preparation method of high vanadium catalyst, comprises the following steps：
Step S1,70 parts of nanometer titanium dioxide, 5 parts of adhesive are weighed by weight, is stirred in 25 parts of addition blenders of molecular sieve
Mix uniformly, add 90 parts of water and continue to be stirred until homogeneous；
Step S2, by mixture extrusion molding in extruder obtained by step S1,350 DEG C of calcinings obtain base substrate in 4 hours；
Step S3,75 parts of silicon-dioxide powdery, 18 parts of organic binder bond, 7 parts of methanol, 170 parts of water are weighed by weight and is added
Enter to be uniformly mixing to obtain maceration extract A in blender, by above-mentioned base substrate, dipping is multiple repeatedly in maceration extract A, dipping complete after
100 DEG C are calcined 1 hour；
Step S4,80 parts of nanometer titanium dioxide, 8 parts of ammonium metavanadate, 12 parts of ammonium tungstate, 150 parts of water, tween are weighed by weight
Maceration extract B is uniformly mixing to obtain in 8014 parts of addition blenders, the base substrate after above-mentioned dipping is calcined soaks repeatedly in maceration extract B
Stain is multiple, and dipping is completed to produce within 1 hour after 100 DEG C of calcinings；
Adhesive is silica sol binder；Molecular sieve is zeolite molecular sieve；Organic binder bond is PVA organic binder bonds.
The catalyst of shaping, after testing, V can be prepared in the above method2O5Quality accounts for the 15% of catalyst quality.
Embodiment 5：
The embodiment is comparative example, and monoethanolamine and Tween 80 are not added when preparing maceration extract B.
A kind of preparation method of high vanadium catalyst, comprises the following steps：
Step S1,70 parts of nanometer titanium dioxide, 5 parts of adhesive are weighed by weight, is stirred in 25 parts of addition blenders of molecular sieve
Mix uniformly, add 90 parts of water and continue to be stirred until homogeneous；
Step S2, by mixture extrusion molding in extruder obtained by step S1,350 DEG C of calcinings obtain base substrate in 4 hours；
Step S3,75 parts of silicon-dioxide powdery, 18 parts of organic binder bond, 7 parts of methanol, 170 parts of water are weighed by weight and is added
Enter to be uniformly mixing to obtain maceration extract A in blender, by above-mentioned base substrate, dipping is multiple repeatedly in maceration extract A, dipping complete after
100 DEG C are calcined 1 hour；
Step S4,150 parts of 80 parts of nanometer titanium dioxide, 8 parts of ammonium metavanadate, 12 parts of ammonium tungstate, water additions are weighed by weight
Maceration extract B is uniformly mixing to obtain in blender, dipping is multiple repeatedly in maceration extract B for the base substrate after above-mentioned dipping is calcined, leaching
Stain is completed to produce within 1 hour after 100 DEG C of calcinings；
Adhesive is silica sol binder；Molecular sieve is zeolite molecular sieve；Organic binder bond is PVA organic binder bonds.
The catalyst of shaping, after testing, V can be prepared in the above method2O5Quality accounts for the 14% of catalyst quality.
Effect example：
The embodiment is abrasion strength resistance and catalytic efficiency testing example.
Abrasion strength resistance method of testing reference literature method (SCR honeycomb type denitrification catalyst abrasion resistance properties simulated tests
Device development and application study, North China power technology, 2013).Abrasion strength resistance is catalyzed with consuming during the abrasion agent of unit mass
The weight-loss ratio of agent represents that unit is：%/kg.The numerical value is smaller, then shows catalyst abrasion strength resistance height, abrasion resistance properties
It is excellent.In test, 10m/s is set into catalyst front speed parameter.
Plant gas flue gas denitration catalyst Efficiency test method parameter is：Flue gas GHSV (gas space velocity per hour)=
30000h-1, O2Volumetric concentration 3%, denitrfying agent NH3By NO：NH3=1：1 (mol ratio) adds, 120 DEG C of catalytic reactions 2 hours.
The measurement result of embodiment 1-5 catalyst is as shown in table 1 and Fig. 1.
The abrasion strength resistance and flue gas denitration catalyst efficiency comparison of the embodiment 1-5 catalyst of table 1
| Abrasion strength resistance (%/kg) | Catalytic efficiency (%) | |
| Embodiment 1 | ＜ 0.01 | 99 |
| Embodiment 2 | 0.02 | 93 |
| Embodiment 3 | ＜ 0.01 | 98 |
| Embodiment 4 | ＜ 0.01 | 99 |
| Embodiment 5 | 0.06 | 63 |
The effect example proves, the abrasion resistance properties of maceration extract B composition and catalyst, catalysis effect in the inventive method
Can be related, monoethanolamine or Tween 80 in maceration extract B are favorably improved the abrasion resistance properties and catalytic efficiency of preformed catalyst.
V in known raising catalyst2O5Content can improve the denitration efficiency of catalyst, but prepare contain in the prior art
The defects of respective be present in the two methods of vanadium catalyst：Overall mixing extrusion molding is not suitable for the preparation of high vanadium catalyst, because
For content of vanadium it is too high can not extrusion molding, be suitable for prepare V2O5Content is 4% or so vanadium containing catalystses；Although infusion process
It can be used for preparing high vanadium catalyst, but abrasion resistance properties are poor, the V on surface2O5Content is easily lost because of abrasion.This hair
The defects of technical scheme of bright offer overcomes prior art, shaping, high vanadium (V can be prepared2O5Quality accounts for catalyst quality
Up to 10-15%) catalyst, and abrasion resistance properties are excellent, can be used for plant gas denitrating flue gas.
The effect of above-described embodiment is the specific essentiality content for introducing the present invention, but those skilled in the art should know
Road, protection scope of the present invention should not be confined to the specific embodiment.
Claims (10)
1. a kind of preparation method of high vanadium catalyst, it is characterised in that comprise the following steps：
Step S1, nanometer titanium dioxide 65-75 parts, adhesive 4-6 parts, molecular sieve 20-30 parts addition blender are weighed by weight
Inside stir, add water 80-100 parts and continue to be stirred until homogeneous；
Step S2, by mixture extrusion molding in extruder obtained by step S1,250~450 DEG C of calcinings obtain base in 3~5 hours
Body；
Step S3, silicon-dioxide powdery 74-76 parts, organic binder bond 16-20 parts, methanol 6-8 parts, water 160- are weighed by weight
Maceration extract A is uniformly mixing to obtain in 180 parts of addition blenders, dipping is multiple repeatedly in maceration extract A by above-mentioned base substrate, has impregnated
0.5-1.5 hours are calcined into after 90-110 DEG C；
Step S4, nanometer titanium dioxide 75-85 parts, ammonium metavanadate 7-9 parts, ammonium tungstate 10-14 parts, water 140- are weighed by weight
160 parts, monoethanolamine 6-10 parts or Tween 80 12-16 parts are added in blender and are uniformly mixing to obtain maceration extract B, and above-mentioned dipping is forged
Dipping is multiple repeatedly in maceration extract B for base substrate after burning, and dipping is completed to produce after 90-110 DEG C of calcining 0.5-1.5 hour；
Wherein, the high vanadium refers to V2O5Quality accounts for the 10-15% of catalyst quality.
2. preparation method according to claim 1, it is characterised in that：Nanometer titanium dioxide 70 is weighed in step S1 by weight
Part, 5 parts of adhesive, 25 parts of molecular sieve are mixed, and are added 90 parts of water and are continued to be stirred until homogeneous.
3. preparation method according to claim 1 or 2, it is characterised in that：Described adhesive is silica sol binder.
4. preparation method according to claim 1 or 2, it is characterised in that：The molecular sieve is zeolite molecular sieve.
5. preparation method according to claim 1, it is characterised in that：Silicon-dioxide powdery is weighed by weight in step S3
75 parts, 18 parts of organic binder bond, 7 parts of methanol, be uniformly mixing to obtain maceration extract A in 170 parts of addition blenders of water.
6. preparation method according to claim 1 or 5, it is characterised in that：Organic binder bond is PVA organic binder bonds.
7. preparation method according to claim 1 or 5, it is characterised in that：By catalyst base substrate in maceration extract A in step S3
In impregnate repeatedly 3 times, each dip time is the 3-5 seconds；Dipping is completed to calcine 1 hour after 100 DEG C.
8. preparation method according to claim 1, it is characterised in that：Nanometer titanium dioxide 80 is weighed in step S4 by weight
Stirred in part, 8 parts of ammonium metavanadate, 12 parts of ammonium tungstate, 150 parts of water, 8 parts of monoethanolamine or 14 parts of addition blenders of Tween 80
To maceration extract B.
9. the preparation method according to claim 1 or 8, it is characterised in that：In step S4 will impregnate calcining after base substrate in
Impregnated repeatedly in maceration extract B 3 times, each dip time is the 3-5 seconds；Dipping is completed to calcine 1 hour after 100 DEG C.
10. the high vanadium catalyst that preparation method described in claim 1 is prepared is used for the purposes of plant gas denitrating flue gas.
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