CN102941127A - Dedicated forming agent for SCR plate-type denitration catalyst and application method thereof - Google Patents
Dedicated forming agent for SCR plate-type denitration catalyst and application method thereof Download PDFInfo
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- CN102941127A CN102941127A CN2012104368899A CN201210436889A CN102941127A CN 102941127 A CN102941127 A CN 102941127A CN 2012104368899 A CN2012104368899 A CN 2012104368899A CN 201210436889 A CN201210436889 A CN 201210436889A CN 102941127 A CN102941127 A CN 102941127A
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- forming agent
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- denitrating catalyst
- board
- mixed
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- 239000003054 catalyst Substances 0.000 title claims abstract description 50
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 17
- 238000002844 melting Methods 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 11
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 9
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 13
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- 239000006210 lotion Substances 0.000 claims description 8
- 229920000609 methyl cellulose Polymers 0.000 claims description 7
- 239000001923 methylcellulose Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 6
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 5
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 5
- 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 5
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 5
- 239000000320 mechanical mixture Substances 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims 3
- 238000006555 catalytic reaction Methods 0.000 abstract description 2
- 239000004480 active ingredient Substances 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 108700018263 Brassica oleracea SCR Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Catalysts (AREA)
Abstract
The invention, belonging to the field of environment protection and environment catalysis, particularly relates to a dedicated forming agent for an SCR plate-type denitration catalyst and an application method thereof. The dedicated forming agent comprises polyvinyl alcohol, organic binder, kaolin, low-melting glass powder and chemical binder, wherein solid polyvinyl alcohol, organic binder, kaolin and low-melting glass powder are mechanically mixed to be as a mixed forming agent, the relative mass contents of the ingredients respectively are 5-10%, 10-20%, 40-60%, and 20-35%; the liquid chemical binder is used individually; the weight ratio of the chemical binder to the powdery mixed forming agent is 1:(2-8). In active ingredients of the SCR denitration catalyst, firstly the powdery mixed forming agent is slowly added with uniformly stirring, and then the liquid chemical binder is added with fully stirring to obtain a catalyst paste used for producing the finished product of the plate-type denitration catalyst.
Description
Technical field
The invention belongs to environmental protection and environmental catalysis field, be specifically related to a kind of SCR board-like denitrating catalyst special molding agent and using method thereof.
Background technology
Ammine selectivity catalytic reduction (SCR) denitration is the main denitration technology of present coal fired power plant, and its core is denitrating catalyst.The coal fired power plant SCR denitrating catalyst of present stage mainly is the catalyst of vanadium titanium system, and its version has honeycomb fashion, board-like and corrugated three kinds; In the catalyst of these three kinds of versions, board-like catalyst has the performance of very strong anti-blocking ash, wear-resistant and anti-poisoning, and the applicability under high cloud of dust gas condition is better.Because the ature of coal of China is comparatively complicated, ash content is generally larger, and therefore board-like catalyst has very large market potential in China.
Raw material and production technology are the deciding factors of denitrating catalyst performance quality.In numerous performance indications, mechanical performance is a very important index, and it has directly affected the service life of catalyst; And the key factor that determines the catalyst mechanical performance is forming agent and using method thereof in its raw material.For the denitrating catalyst of different structure form, the forming agent that it was suitable for and using method thereof are different.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, special molding agent and the using method thereof of the board-like denitrating catalyst of a kind of SCR is provided.
The agent of the board-like denitrating catalyst special molding of SCR is comprised of polyvinyl alcohol, organic binder bond, kaolin, glass powder with low melting point and Chemical Felter; Wherein use as the mixed-forming agent after solid-state polyvinyl alcohol, organic binder bond, kaolin and the glass powder with low melting point mechanical mixture, the relative mass content of each component is respectively 5-10%, 10-20%, 40-60%, 20-35%; Liquid Chemical Felter adds separately use; During use, the mass ratio of Chemical Felter and powder-mixed forming agent is 1:(2-8).
Preferably, described organic binder bond is the mixture of methylcellulose or hydroxypropyl methylcellulose or both arbitrary proportions.
Preferably, described Chemical Felter is Ludox or aluminium colloidal sol.
Preferably, described glass powder with low melting point is not leaded, understands melting when being heated to below 500 ℃, and understanding hardened forming after being cooled to room temperature.
The using method of the board-like denitrating catalyst special molding of above-mentioned SCR agent may further comprise the steps:
(1) in proportion weighing polyvinyl alcohol, organic binder bond, kaolin and glass powder with low melting point, mechanical mixture obtains the powder-mixed forming agent;
(2) anatase-type nanometer titanium dioxide be impregnated in the aqueous solution that is dissolved with ammonium metavanadate and ammonium metatungstate, after stirring and ageing, obtain SCR denitrating catalyst active component, in the active component () of this SCR denitrating catalyst, slowly add above-mentioned powder-mixed forming agent and fully stirring, so that the mass ratio of mixed-forming agent and titanium dioxide is 1:(3-4);
(3) in the mixture that step (2) obtains, add Chemical Felter, so that the mass ratio of Chemical Felter and powder-mixed forming agent is 1:(2-8), after fully stirring 1-4h, obtain the catalyst lotion, for the production of the board-like denitrating catalyst of finished product.
Preferably, also be dissolved with oxalic acid in the aqueous solution that is dissolved with ammonium metavanadate and ammonium metatungstate described in the step (2).
Beneficial effect of the present invention is:
The special molding agent of the board-like denitrating catalyst of SCR of the present invention is based on the synergy between the multi-component masses, realizes efficient adhesive solidification effect, thereby obtains the board-like denitrating catalyst of high mechanical properties.(1) Ludox and aluminium colloidal sol are efficient Chemical Felters, its permeability is stronger, dispersiveness when mixing with other materials and permeability are all better, and when in being subjected to thermal process, drying out gradually, stick to securely material surface, form high-intensity adhesive, have high temperature resistant, do not affect the characteristics such as catalyst activity; (2) the normal glass fibre that uses in the board-like denitrating catalyst preparation process of present stage, conventional glass fibre is being difficult to melting formation binding agent below 550 ℃, glass powder with low melting point of the present invention is being melting below 500 ℃, meeting curing molding after the cooling, thus high-intensity adhesive also formed; (3) polyvinyl alcohol, methylcellulose and hydroxypropyl methylcellulose all are efficient matrix binder, titanium dioxide and kaolinic material had good bonding effect, and noresidue after roasting does not affect the activity of catalyst, and polyvinyl alcohol also has a kind of effective extrusion aid in addition.
The specific embodiment
The invention provides special molding agent and the using method thereof of the board-like denitrating catalyst of a kind of SCR, the present invention will be further described below in conjunction with the specific embodiment.
Embodiment 1
Take by weighing respectively polyvinyl alcohol, methylcellulose, kaolin and the glass powder with low melting point of 8kg, 18kg, 50kg and 24kg, obtain the mixed-forming agent of 100kg after the mechanical mixture;
The ammonium metavanadate, ammonium metatungstate and the oxalic acid that take by weighing respectively 9kg, 45kg and 12kg are dissolved in the deionized water of 220kg, by stirring ammonium metavanadate, ammonium metatungstate and oxalic acid are dissolved fully; In mentioned solution, add the anatase-type nanometer titanium dioxide of 350kg, fully stir 3h titanium dioxide is fully infiltrated, obtain the catalyst activity component;
In above-mentioned catalyst activity component, slowly add the mixed-forming agent of 100kg and fully stirring; The last Ludox that adds again 30kg (SiO wherein
2Content is 30%), after fully stirring 3h, obtain the catalyst lotion.
The board-like denitrating catalyst that utilizes this lotion to produce, this catalyst is at typical flue gas (NOx 500ppm, SO
21000ppm, NH
3500ppm) operating mode and air speed are that the denitration efficiency under the 10000h-1 is 95%, have no the phenomenon such as to peel off after using 2 years.
Embodiment 2
Adopt and embodiment 1 identical composition of raw materials and using method, only the methylcellulose of 18kg is changed into the mixture of 8kg methylcellulose and 10kg hydroxypropyl methylcellulose, thereby obtain the catalyst lotion.
The board-like denitrating catalyst that utilizes this lotion to produce, this catalyst is at typical flue gas (NOx 500ppm, SO
21000ppm, NH
3500ppm) operating mode and air speed are 10000h
-1Under denitration efficiency be 95%, after using 2 years, have no and the phenomenon such as peel off.
Embodiment 3
Adopt and embodiment 1 identical composition of raw materials and using method, only the methylcellulose of 18kg is changed into the hydroxypropyl methylcellulose of 18kg, in addition the Ludox of 30kg is changed into the aluminium colloidal sol (Al wherein of 30kg
2O
3Content be 30%), thereby obtain the catalyst lotion.
The board-like denitrating catalyst that utilizes this lotion to produce, this catalyst is at typical flue gas (NOx 500ppm, SO
21000ppm, NH
3500ppm) operating mode and air speed are 10000h
-1Under denitration efficiency be 95%, after using 2 years, have no and the phenomenon such as peel off.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of the present invention.
Claims (6)
1. the board-like denitrating catalyst special molding of SCR agent, it is characterized in that: described binding agent is comprised of polyvinyl alcohol, organic binder bond, kaolin, glass powder with low melting point and Chemical Felter; Wherein polyvinyl alcohol, organic binder bond, kaolin and glass powder with low melting point are solid-state, and mechanical mixture is powdered to be used afterwards as the mixed-forming agent, and the relative mass content of each component is respectively 5-10%, 10-20%, 40-60%, 20-35%; Liquid Chemical Felter adds separately use; During use, the mass ratio of Chemical Felter and powder-mixed forming agent is 1:(2-8).
2. the board-like denitrating catalyst special molding of SCR according to claim 1 auxiliary agent, it is characterized in that: described organic binder bond is the mixture of methylcellulose or hydroxypropyl methylcellulose or both arbitrary proportions.
3. the board-like denitrating catalyst special molding of SCR according to claim 1 auxiliary agent, it is characterized in that: described Chemical Felter is Ludox or aluminium colloidal sol.
4. the board-like denitrating catalyst special molding of SCR according to claim 1 auxiliary agent, it is characterized in that: described glass powder with low melting point is not leaded, can melting when being heated to below 500 ℃, can hardened forming after the room temperature and be cooled to.
5. using method such as the agent of the board-like denitrating catalyst special molding of each described SCR of claim 1-4 may further comprise the steps:
(1) in proportion weighing polyvinyl alcohol, organic binder bond, kaolin and glass powder with low melting point, mechanical mixture obtains the powder-mixed forming agent;
(2) anatase-type nanometer titanium dioxide be impregnated in the aqueous solution that is dissolved with ammonium metavanadate and ammonium metatungstate, after stirring and ageing, obtain SCR denitrating catalyst active component, in the active component of this SCR denitrating catalyst, slowly add above-mentioned powder-mixed forming agent and fully stirring, so that the mass ratio of mixed-forming agent and titanium dioxide is 1:(3-4);
(3) in the mixture that step (2) obtains, add Chemical Felter, so that the mass ratio of Chemical Felter and powder-mixed forming agent is 1:(2-8), after fully stirring 1-4h, obtain the catalyst lotion, for the production of the board-like denitrating catalyst of finished product.
6. using method according to claim 5 is characterized in that: also be dissolved with oxalic acid in the aqueous solution that is dissolved with ammonium metavanadate and ammonium metatungstate described in the step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436889.9A CN102941127B (en) | 2012-11-05 | 2012-11-05 | Dedicated forming agent for SCR plate-type denitration catalyst and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436889.9A CN102941127B (en) | 2012-11-05 | 2012-11-05 | Dedicated forming agent for SCR plate-type denitration catalyst and application method thereof |
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| Publication Number | Publication Date |
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| CN102941127A true CN102941127A (en) | 2013-02-27 |
| CN102941127B CN102941127B (en) | 2014-08-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307508A (en) * | 2014-10-17 | 2015-01-28 | 辽宁科隆精细化工股份有限公司 | Preparation method of SCR denitration catalyst capable of being rapidly dried |
| CN111686713A (en) * | 2020-06-22 | 2020-09-22 | 安徽省博广运环保科技有限公司 | Binder for improving mechanical strength of denitration catalyst and denitration catalyst |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101474570A (en) * | 2009-01-08 | 2009-07-08 | 中电投远达环保工程有限公司 | SCR granular catalyst substrate and preparation method thereof |
| CN101513620A (en) * | 2009-04-07 | 2009-08-26 | 南京大学 | Preparation method for titanium dioxide group catalyst carrier |
| CN102078753A (en) * | 2010-12-31 | 2011-06-01 | 华东理工大学 | Cellular activated carbon-based denitration catalyst as well as preparation and application thereof |
-
2012
- 2012-11-05 CN CN201210436889.9A patent/CN102941127B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101474570A (en) * | 2009-01-08 | 2009-07-08 | 中电投远达环保工程有限公司 | SCR granular catalyst substrate and preparation method thereof |
| CN101513620A (en) * | 2009-04-07 | 2009-08-26 | 南京大学 | Preparation method for titanium dioxide group catalyst carrier |
| CN102078753A (en) * | 2010-12-31 | 2011-06-01 | 华东理工大学 | Cellular activated carbon-based denitration catalyst as well as preparation and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307508A (en) * | 2014-10-17 | 2015-01-28 | 辽宁科隆精细化工股份有限公司 | Preparation method of SCR denitration catalyst capable of being rapidly dried |
| CN111686713A (en) * | 2020-06-22 | 2020-09-22 | 安徽省博广运环保科技有限公司 | Binder for improving mechanical strength of denitration catalyst and denitration catalyst |
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| Publication number | Publication date |
|---|---|
| CN102941127B (en) | 2014-08-06 |
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Application publication date: 20130227 Assignee: Beijing large green technology Co., Ltd of electric light of China Assignor: Beijing Nation Power New Energy and Environmental Protection Technology Co., Ltd. Contract record no.: 2016990000134 Denomination of invention: Dedicated forming agent for SCR plate-type denitration catalyst and application method thereof Granted publication date: 20140806 License type: Exclusive License Record date: 20160407 |
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Effective date of registration: 20190104 Address after: 102200 C1034, 2nd floor, No. 16 Building, 37 Qianqian Road, Changping District Science Park, Beijing Patentee after: Beijing Huadian Everbright environmental Limited by Share Ltd Address before: Room 307, Executive Building No. 2, Beinong Road, Huilongguan Town, Changping District, Beijing Patentee before: Beijing Nation Power New Energy and Environmental Protection Technology Co., Ltd. |