CN108283921A - 60 hole SCR denitration modules and preparation method thereof - Google Patents
60 hole SCR denitration modules and preparation method thereof Download PDFInfo
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- CN108283921A CN108283921A CN201810022038.7A CN201810022038A CN108283921A CN 108283921 A CN108283921 A CN 108283921A CN 201810022038 A CN201810022038 A CN 201810022038A CN 108283921 A CN108283921 A CN 108283921A
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- hole
- scr denitration
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- denitration
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 23
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000008367 deionised water Substances 0.000 claims abstract description 12
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 12
- 239000004014 plasticizer Substances 0.000 claims abstract description 10
- 239000002562 thickening agent Substances 0.000 claims abstract description 10
- 239000012745 toughening agent Substances 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims description 55
- 238000002156 mixing Methods 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 239000000908 ammonium hydroxide Substances 0.000 claims description 7
- 239000010425 asbestos Substances 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 229910052895 riebeckite Inorganic materials 0.000 claims description 7
- 230000035807 sensation Effects 0.000 claims description 7
- 239000002383 tung oil Substances 0.000 claims description 7
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 6
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 6
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 6
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- 235000011187 glycerol Nutrition 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 3
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 3
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 3
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- -1 structural promoter Substances 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 claims 2
- HBGPNLPABVUVKZ-POTXQNELSA-N (1r,3as,4s,5ar,5br,7r,7ar,11ar,11br,13as,13br)-4,7-dihydroxy-3a,5a,5b,8,8,11a-hexamethyl-1-prop-1-en-2-yl-2,3,4,5,6,7,7a,10,11,11b,12,13,13a,13b-tetradecahydro-1h-cyclopenta[a]chrysen-9-one Chemical compound C([C@@]12C)CC(=O)C(C)(C)[C@@H]1[C@H](O)C[C@]([C@]1(C)C[C@@H]3O)(C)[C@@H]2CC[C@H]1[C@@H]1[C@]3(C)CC[C@H]1C(=C)C HBGPNLPABVUVKZ-POTXQNELSA-N 0.000 claims 1
- PFRGGOIBYLYVKM-UHFFFAOYSA-N 15alpha-hydroxylup-20(29)-en-3-one Natural products CC(=C)C1CCC2(C)CC(O)C3(C)C(CCC4C5(C)CCC(=O)C(C)(C)C5CCC34C)C12 PFRGGOIBYLYVKM-UHFFFAOYSA-N 0.000 claims 1
- SOKRNBGSNZXYIO-UHFFFAOYSA-N Resinone Natural products CC(=C)C1CCC2(C)C(O)CC3(C)C(CCC4C5(C)CCC(=O)C(C)(C)C5CCC34C)C12 SOKRNBGSNZXYIO-UHFFFAOYSA-N 0.000 claims 1
- 239000010426 asphalt Substances 0.000 claims 1
- 239000001913 cellulose Substances 0.000 claims 1
- 229920002678 cellulose Polymers 0.000 claims 1
- 235000010980 cellulose Nutrition 0.000 claims 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 claims 1
- 239000003925 fat Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002985 plastic film Substances 0.000 description 5
- 229920006255 plastic film Polymers 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 3
- 125000003367 polycyclic group Chemical group 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- DFGMFVYRMVYRRA-UHFFFAOYSA-N [O].CC Chemical compound [O].CC DFGMFVYRMVYRRA-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- 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
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/30—Tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/618—Surface area more than 1000 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
Abstract
The present invention provides 60 hole SCR denitration modules and preparation method thereof, and the cross section hole counts of 60 hole SCR denitration modules is the hole of 60 holes × 60, and the weight of each component of 60 hole SCR denitration modules is：50~60 parts of denitration titanium tungsten powder, 0.5~1 part of ammonium metavanadate, 1~2.5 part of plasticizer, 0.20~0.6 part of toughener, 1~2 part of releasing agent, 1~1.5 part of thickener, 33.4~42.5 parts of deionized water.The 60 hole SCR denitration module ratio of briquetting of the present invention are high, and mechanical strength is higher, geometry large specific surface area, and denitration efficiency is high, and the requirement to equipment is relatively low, and equipment maintenance cost is relatively low, saves cost.
Description
Technical field
The present invention relates to SCR denitration technical field more particularly to SCR denitration module and its preparation sides
Method.
Background technology
Selective catalytic reduction (SCR) denitration technology is a kind of gas denitrifying technology efficiently, reliable, ripe, is answered extensively
For in domestic and international flue gas denitrification system, SCR denitration to be the core of the technology, V2O5~WO3(MoO3)/TiO2Catalyst
It is a kind of catalyst being most widely used in the world at present.
Combustion gas, fuel oil consump-tion denitrating catalyst regular size be generally 30 holes, 35 holes, 40 holes, 50 holes, 55 holes or more
Hole count (is calculated) with the hole count on the unilateral 15cm in section.30 holes, 35 holes, 40 holes denitrating catalyst due to specific surface area is smaller,
Activity per unit volume is relatively low, big using taking up an area, and denitration cost is higher.Denitrating catalyst specific surface areas more than 50 holes is larger, takes off
Nitre is efficient, but there are certain technical barriers, such as catalyst to be susceptible to crack or appearance when squeezing out in preparation
It is easily bonded on mold, ratio of briquetting is low, mechanical strength is low, causes the waste for making resource, increases cost.
Invention content
The purpose of the present invention is to provide 60 hole SCR denitration modules and preparation method thereof, it is to solve conventional de-
Denox catalyst specific surface area is smaller, activity per unit volume is relatively low, big using taking up an area, and denitrating catalysts more than 50 holes is squeezing out
When be susceptible to crack or be easy to be bonded on mold, ratio of briquetting is low, mechanical strength is low, cause make resource waste, increase
The technical issues of having added cost.
In order to solve the above technical problem, the present invention provides 60 hole SCR denitration modules, it is characterised in that：It is described
The cross section hole count of 60 hole SCR denitration modules is the hole of 60 holes × 60, each component of 60 hole SCR denitration modules
Weight is：50~60 parts of denitration titanium tungsten powder, 0.5~1 part of ammonium metavanadate, 1~2.5 part of plasticizer, toughener 0.2~
0.6 part, 1~2 part of releasing agent, 1~1.5 part of thickener, 33.4~42.5 parts of deionized water.
Preferably, the plasticizer is one or more mixtures in epoxy resin, polyethylene glycol, polyvinyl alcohol.
Preferably, the toughener is the mixing of one or more of asbestos fibre, glass fibre, mineral fibres
Object.
Preferably, the releasing agent is the mixture of one or more of stearic acid, tung oil, glycerine, paraffin.
Preferably, the thickener is hydroxyethyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, polycyclic oxygen
One or more mixtures in ethane.
Preferably, the denitration titanium tungsten Powder Particle Size is d90≤1.5 μm, and size distribution is Unimodal Distribution, specific surface area >=
100m2/g。
Preferably, the cross sectional dimensions of the 60 hole SCR denitration module is 15cm × 15cm, and trepanning spacing is
2.08mm~2.29mm, interior wall thickness 0.31mm~0.35mm, percent opening 75.1%~76.8%.
Preferably, the geometry specific surface area of the 60 hole SCR denitration module is more than 1300m2/m3。
Preferably, the axial compression strength of the 60 hole SCR denitration module is more than 2MPa, and radial crushing strength is big
In 0.7MPa.
In addition, the present invention also provides the preparation methods of above-mentioned 60 hole SCR denitration module, it is characterised in that including with
Lower step：
Step 1：Stock, stocks up according to following parts by weight：
50~60 parts of denitration titanium tungsten powder, 0.5~1 part of ammonium metavanadate, 1~2.5 part of plasticizer, 0.2~0.6 part of toughener,
1~2 part of releasing agent, 1~1.5 part of thickener, 33.4~42.5 parts of deionized water；
Step 2：Denitration titanium tungsten powder is put into mixing kneader by batch mixing；Denitration titanium is added in ammonium metavanadate and toughener
In tungsten powder, mixing kneader is opened, is slowly stirred to uniformly mixed；
Step 3：Be kneaded, into mixing kneader, be separately added into deionized water, structural promoter, plasticizer, releasing agent and
Thickener stirs continuously and healthily, until hand touches pug when without granular sensation and moisture being 30%, stops stirring；
Step 4：PH is adjusted, ammonium hydroxide is added and adjusts pH to 7.5~8.0；
Step 5：It is aging, pug obtained by step 4 is taken out from kneader, pug is wrapped up, is put into closed hopper, and
Hopper is placed in the environment of without sunlight irradiation；
Step 6：Pre-extruded takes out pug obtained by step 5 from hopper, removes plastic foil, and it is double to be then placed in vacuum
In axis extruder feed bin, pug is set to pass through the strainer that vacuum biaxial extruder exports, and the pug filtered out is stored in collecting box
In；
Step 7：Pug obtained by step 6 is put into vacuum biaxial extruder feed bin, pug is made to pass through very by extrusion molding
60 pore catalyst molds of empty biaxial extruder port, cutting squeeze out pug, obtain catalyst green body；
Step 8：It is dry, catalyst green body is wrapped up, is placed in the environment that room temperature, without sunlight are irradiated, then by inclusion enclave
It is placed in drying box；
Step 9：Roasting, the catalyst green body after drying is placed on the conveyer belt of net belt type tunnel oven, roasting obtains
Finished catalyst.
Compared with prior art, the features of the present invention and advantageous effect are：
1,60 hole SCR denitration module ratio of briquetting of the invention are high, and mechanical strength is higher, in making and handling process
In be not in damage, reduce cost.
2,60 hole SCR denitration modules of the invention are small catalyst, and geometry specific surface area is more than 1300m2/
m3, denitration efficiency is up to 97.3%.
3,60 hole SCR denitration modules of the invention be requirement of the preparation method of small catalyst to equipment compared with
Low, equipment maintenance cost is relatively low, saves cost.
4, the crucial technology of preparing of 60 hole honeycomb type denitrification catalysts of the invention, obtains 60 pore catalyst products, fills up
The relevant technologies and the product market vacancy.
5,60 hole SCR denitration modules of the invention, which are small catalyst, can be widely used in gas fired-boiler, and
Ship, smoke of oil-fuel boiler denitration engineering, advance the development of domestic related field environmental protection cause.
Specific implementation mode
Technological means, character of innovation, reached purpose and effect to make the present invention realize are easy to understand, below to this
Invention further illustrates.
The embodiment recorded herein is the specific specific implementation mode of the present invention, for illustrating design of the invention,
It is explanatory and illustrative, should not be construed as the limitation to embodiment of the present invention and the scope of the invention.Except what is recorded herein
Outside embodiment, those skilled in the art can also based on the application claims and specification disclosure of that using aobvious and
The other technical solutions being clear to, these technical solutions include any obvious using making for the embodiment to recording herein
The technical solution of substitutions and modifications.
It stocks up according to parts by weight shown in table 1.
The component and proportioning of 1. dispensing of table
Denitration titanium tungsten powder is commercially available conventional denitration titanium tungsten powder, and denitration titanium tungsten Powder Particle Size is d90≤1.5 μm, and size distribution is
Unimodal Distribution, specific surface area >=100m2/g。
Ammonium metavanadate is commercially available conventional ammonium metavanadate.
One or more mixtures of the plasticizer in epoxy resin, polyethylene glycol, polyvinyl alcohol.
Toughener is the mixture of one or more of asbestos fibre, glass fibre, mineral fibres.
Releasing agent is the mixture of one or more of stearic acid, tung oil, glycerine, paraffin.
Thickener is one kind in hydroxyethyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, polyethylene oxide
Or a variety of mixture.
60 hole SCR denitration modules are prepared using following methods.
Embodiment 1
By denitration titanium tungsten powder (d90≤1.5 μm, specific surface area >=100cm2/ g) it is put into mixing kneader, it then will be inclined
Ammonium vanadate and glass fibre are added in denitration titanium tungsten powder, open mixing kneader, slowly stir 30min；Into kneading machine, respectively
Deionized water, polyethylene glycol, tung oil and carboxymethyl cellulose is added, stirs continuously and healthily, until hand touches pug without granular sensation, and water
When point content is 30%, stop stirring；Ammonium hydroxide is added and adjusts pH to 7.5, continues to stir 15min；By pug from mixing kneader
Middle taking-up is put into closed hopper, and closed hopper is placed in the environment of without sunlight irradiation, is put with plastic film wrapped
It sets about 48 hours；Pug is taken out from closed hopper, plastic foil is removed, is then placed in vacuum biaxial extruder feed bin,
So that pug is passed through the strainer that vacuum biaxial extruder exports, and the pug filtered out is stored in collecting box；Pug is put into very
In empty biaxial extruder feed bin, pug is set to pass through 60 pore catalyst moulds of vacuum biaxial extruder port with the speed of 1m/min
Tool, cutting squeeze out pug, obtain catalyst green body；Catalyst green body is wrapped up using sponge and millboard, is shone in room temperature, without sunlight
Place 56 hours in the environment penetrated, then by inclusion enclave be placed on 60 DEG C, in the drying box of humidity 55% it is 200 hours dry；It will
Catalyst green body after drying, is placed on the conveyer belt of net belt type tunnel oven, roasts 30 hours, is catalyzed at 600 DEG C
Agent module finished product.
Embodiment 2
By denitration titanium tungsten powder (d90≤1.5 μm, specific surface area >=100cm2/ g) it is put into mixing kneader, it then will be inclined
Ammonium vanadate, asbestos fibre and glass fibre are added in denitration titanium tungsten powder, open mixing kneader, slowly stir 30min to mixing
Uniformly；Into kneading machine, it is separately added into deionized water, polyethylene glycol, polyvinyl alcohol, glycerine, carboxymethyl cellulose and polycyclic oxygen
Ethane stirs continuously and healthily, until hand touches pug without granular sensation, and when moisture is 30%, stops stirring；Ammonium hydroxide is added to adjust
PH to 7.5 continues to stir 15min；Pug is taken out from kneader, with plastic film wrapped, is put into closed hopper, and will material
Case is placed in the environment of without sunlight irradiation, is placed about 48 hours；Pug is taken out from closed hopper, removes plastic foil,
It is then placed in vacuum biaxial extruder feed bin, pug is made to pass through the strainer that vacuum biaxial extruder exports, and the mud that will be filtered out
Material is stored in collecting box；Pug is put into vacuum biaxial extruder feed bin, so that pug is passed through vacuum with the speed of 1m/min
60 pore catalyst molds of biaxial extruder port, cutting squeeze out pug, obtain catalyst green body；Use sponge and millboard packet
Catalyst green body is wrapped up in, is placed 56 hours in the environment that room temperature, without sunlight are irradiated, inclusion enclave is then placed on 50 DEG C, humidity
It is 20 hours dry in 60% drying box；The catalyst green body after drying is placed on the conveyer belt of net belt type tunnel oven,
It is roasted 26 hours at 600 DEG C, obtains catalyst module finished product.
Embodiment 3
By denitration titanium tungsten powder (d90≤1.5 μm, specific surface area >=100cm2/ g) it is put into mixing kneader, it then will be inclined
Ammonium vanadate, asbestos fibre, glass fibre and mineral fibres are added in denitration titanium tungsten powder, open mixing kneader, slowly stir
30min to be uniformly mixed；Into kneading machine, it is separately added into deionized water, polyethylene glycol, polyvinyl alcohol, tung oil and polycyclic oxygen second
Alkane stirs continuously and healthily, until hand touches pug without granular sensation, and when moisture is 30%, stops stirring；Ammonium hydroxide is added and adjusts pH
To 7.8, continue to stir 15min；Pug is taken out from kneader, with plastic film wrapped, is put into closed hopper, and by hopper
It is placed in the environment of without sunlight irradiation, places about 48 hours；Pug is taken out from closed hopper, removes plastic foil, so
After be put into vacuum biaxial extruder feed bin, so that pug is passed through the strainer that vacuum biaxial extruder exports, and the pug that will be filtered out
It is stored in collecting box；Pug is put into vacuum biaxial extruder feed bin, so that pug is passed through vacuum with the speed of 1m/min double
60 pore catalyst molds of axis extruder port, cutting squeeze out pug, obtain catalyst green body；It is wrapped up using sponge and millboard
Catalyst green body is placed 56 hours in the environment that room temperature, without sunlight are irradiated, inclusion enclave is then placed on 70 DEG C, humidity
It is 200 hours dry in 60% drying box；The catalyst green body after drying is placed on the conveyer belt of net belt type tunnel oven,
It is roasted 36 hours at 500 DEG C, obtains catalyst module finished product.
Embodiment 4
By denitration titanium tungsten powder (d90≤1.5 μm, specific surface area >=100cm2/ g) it is put into mixing kneader, it then will be inclined
Ammonium vanadate, asbestos fibre and mineral fibres are added in denitration titanium tungsten powder, open mixing kneader, slowly stir 30min to mixing
Uniformly；Into kneading machine, it is separately added into deionized water, polyethylene glycol, polyvinyl alcohol, tung oil and carboxymethyl cellulose, is continued fast
Speed stirring stops stirring until hand touches pug without granular sensation, and when moisture is 30%；Ammonium hydroxide is added and adjusts pH to 8.0, after
Continuous stirring 15min；Pug is taken out from kneader, with plastic film wrapped, is put into closed hopper, and hopper is placed on nothing
In sunlit environment, place about 48 hours；Pug is taken out from closed hopper, removes plastic foil, is then placed in true
In empty biaxial extruder feed bin, pug is set to pass through the strainer that vacuum biaxial extruder exports, and the pug filtered out is stored in receipts
In header；Pug is put into vacuum biaxial extruder feed bin, so that pug is passed through vacuum biaxial extruder with the speed of 1m/min
60 pore catalyst molds of port, cutting squeeze out pug, obtain catalyst green body；Catalyst base is wrapped up using sponge and millboard
Body places 56 hours in the environment that room temperature, without sunlight are irradiated, and inclusion enclave is then placed on 60 DEG C, the drying of humidity 55%
Dry 200h in case；It is placed on the catalyst green body after drying on the conveyer belt of net belt type tunnel oven, is roasted at 600 DEG C
30 hours, obtain catalyst module finished product.
Embodiment 5
By denitration titanium tungsten powder (d90≤1.5 μm, specific surface area >=100cm2/ g) it is put into mixing kneader, it then will be inclined
Ammonium vanadate and asbestos fibre are added in denitration titanium tungsten powder, open mixing kneader, slowly stir 30min to being uniformly mixed；To mixed
In mill, it is separately added into deionized water, polyethylene glycol, polyvinyl alcohol, tung oil, glycerine, hydroxyethyl cellulose and polyethylene oxide,
It stirs continuously and healthily, until hand touches pug without granular sensation, and when moisture is 30%, stops stirring；Be added ammonium hydroxide adjust pH to
8.0, continue to stir 15min；Pug is taken out from kneader, with plastic film wrapped, is put into closed hopper, and hopper is put
It sets in the environment that without sunlight is irradiated, places about 48 hours；Pug is taken out from closed hopper, removes plastic foil, then
It is put into vacuum biaxial extruder feed bin, so that pug is passed through the strainer that vacuum biaxial extruder exports, and the pug filtered out is deposited
It is placed in collecting box；Pug is put into vacuum biaxial extruder feed bin, so that pug is passed through vacuum twin shaft with the speed of 1m/min
60 pore catalyst molds of extruder port, cutting squeeze out pug, obtain catalyst green body；It is urged using sponge and millboard package
Agent green body is placed 56 hours in the environment that room temperature, without sunlight are irradiated, inclusion enclave is then placed on 65 DEG C, humidity 50%
Drying box in dry 180 hours；It is placed on the conveyer belt of net belt type tunnel oven, the catalyst green body after drying 600
It is roasted 30 hours at DEG C, obtains catalyst module finished product.
Table 2 is the appearance test result of 60 hole denitrification catalyst modules.
The geometry specific surface area of catalyst module is calculated according to the following formula：
The percent opening of catalyst module unit is calculated according to the following formula：
In formula：
The numerical value in d- catalyst modules aperture, unit are millimeter (mm)；
The quantity of a round on n- catalyst module unit body sections；
A, b- cell cross-sections are long and spend, and generally take 150mm.
Table 2 is according to appearance test result made from embodiment
As shown in Table 2, the geometry specific surface area of 60 hole SCR denitration modules made from method using the present invention is high
Up to 1400m2/m3More than, percent opening is up to 76% or more, and ratio of briquetting is up to 99%.
60 hole SCR denitration modules made from above-described embodiment are subjected to denitration efficiency test, experimental provision is by matching
Gas system, flow control (mass flowmenter), gas mixer, gas preheater, catalytic reactor and flue gas analysis system structure
At.Self-contained 60 hole denitrating catalyst (150 × 150 × 1000mm) is cut into small-sized detection block (45 × 45 × 200mm), then
Small-sized detection block is put into fixing tubular reactor.Simulated flue gas group becomes：NO、NH3、O2、H2O and carrier gas N2Composition mixes
Close total gas flow rate 608L/h, air speed 6000h~1, NH3/ NO=1, reaction temperature are controlled at 300 DEG C.Each gas flow is by matter
Measure flowmeter and spinner flowmeter control.Gas first passes through gas mixer mixing before entering reactor, using preheater
Preheating.The NO concentration of air inlet and gas outlet is measured by flue gas analyzer.In order to eliminate the influence of adsorption, system is being ventilated
Start collecting test within stable 20~30 minutes.Table 3 is 60 hole denitrification catalyst module the performance test results.
The denitration efficiency of catalyst module is calculated according to the following formula：
In formula：
C1The numerical value of reactor inlet NOx volume fractions (standard state, butt), unit are microlitre every liter (μ L/L)；
C2The numerical value of reactor outlet NOx volume fractions (standard state, butt), unit are microlitre every liter (μ L/L).
The axially and radially compression strength of catalyst module is calculated according to the following formula：
In formula：
The numerical value of F- maximum pressure indicating values, unit are newton (N)；
The numerical value of L- samples bottom (or top) length, unit are millimeter (mm)；
The numerical value of W- samples bottom (or top) width, unit are millimeter (mm).
Table 3 is according to the performance test results of product made from embodiment
As shown in Table 3,60 hole denitrification catalyst module made from the method using invention, in the premise for ensureing compression strength
Lower denitration effect is notable, and up to 97% or more.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (10)
1.60 hole SCR denitration modules, it is characterised in that：The cross section hole count of the 60 hole SCR denitration module
For the hole of 60 holes × 60, the weight of each component of 60 hole SCR denitration modules is：50~60 parts of denitration titanium tungsten powder,
0.5~1 part of ammonium metavanadate, 1~2.5 part of plasticizer, 0.2~0.6 part of toughener, 1~2 part of releasing agent, 1~1.5 part of thickener,
33.4~42.5 parts of deionized water.
2. 60 hole SCR denitration module according to claim 1, it is characterised in that：The plasticizer is asphalt mixtures modified by epoxy resin
One or more mixtures in fat, polyethylene glycol, polyvinyl alcohol.
3. 60 hole SCR denitration module according to claim 1, it is characterised in that：The toughener is that asbestos are fine
The mixture of one or more of dimension, glass fibre, mineral fibres.
4. 60 hole SCR denitration module according to claim 1, it is characterised in that：The releasing agent be stearic acid,
The mixture of one or more of tung oil, glycerine, paraffin.
5. 60 hole SCR denitration module according to claim 1, it is characterised in that：The thickener is ethoxy
One or more mixtures in cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, polyethylene oxide.
6. 60 hole SCR denitration module according to claim 1, it is characterised in that：The denitration titanium tungsten Powder Particle Size
For d90≤1.5 μm, size distribution is Unimodal Distribution, specific surface area >=100m2/g。
7. the 60 hole SCR denitration modules according to claim 1~6 any one, it is characterised in that：60 hole
The cross sectional dimensions of SCR denitration module is 15cm × 15cm, and trepanning spacing is 2.08mm~2.29mm, interior wall thickness
0.31mm~0.35mm, percent opening 75.1%~76.8%.
8. 60 hole SCR denitration module according to claim 7, it is characterised in that：60 hole SCR denitration catalysis
The geometry specific surface area of agent module is more than 1300m2/m3。
9. 60 hole SCR denitration module according to claim 8, it is characterised in that：60 hole SCR denitration catalysis
The axial compression strength of agent module is more than 2MPa, and radial crushing strength is more than 0.7MPa.
10. according to the preparation method of 60 hole SCR denitration module as described in any one of claim 1 to 9, feature exists
In including the following steps：
Step 1：Stock, stocks up according to following parts by weight：
50~60 parts of denitration titanium tungsten powder, 0.5~1 part of ammonium metavanadate, 1~2.5 part of plasticizer, 0.2~0.6 part of toughener, demoulding
1~2 part of agent, 1~1.5 part of thickener, 33.4~42.5 parts of deionized water；
Step 2：Denitration titanium tungsten powder is put into mixing kneader by batch mixing；Denitration titanium tungsten powder is added in ammonium metavanadate and toughener
In, mixing kneader is opened, is slowly stirred to uniformly mixed；
Step 3：It is kneaded, into mixing kneader, is separately added into deionized water, structural promoter, plasticizer, releasing agent and thickening
Agent is stirred continuously and healthily, until hand touches pug when without granular sensation and moisture being 30%, stops stirring；
Step 4：PH is adjusted, ammonium hydroxide is added and adjusts pH to 7.5~8.0；
Step 5：It is aging, pug obtained by step 4 is taken out from mixing kneader, pug is wrapped up, is put into closed hopper, and
Closed hopper is placed in the environment of without sunlight irradiation；
Step 6：Pre-extruded takes out pug obtained by step 5 from closed hopper, removes plastic foil, is then placed in vacuum
In biaxial extruder feed bin, pug is set to pass through the strainer that vacuum biaxial extruder exports, and the pug filtered out is stored in collection
In case；
Step 7：Pug obtained by step 6 is put into vacuum biaxial extruder feed bin by extrusion molding, so that pug is passed through vacuum double
60 pore catalyst molds of axis extruder port, cutting squeeze out pug, obtain catalyst green body；
Step 8：It is dry, catalyst green body is wrapped up, places in the environment that room temperature, without sunlight are irradiated, then places inclusion enclave
In drying box；
Step 9：Roasting, the catalyst green body after drying is placed on the conveyer belt of net belt type tunnel oven, and roasting is catalyzed
Agent finished product.
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