CN107020079A - A kind of denitrating catalyst - Google Patents
A kind of denitrating catalyst Download PDFInfo
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- CN107020079A CN107020079A CN201610069412.XA CN201610069412A CN107020079A CN 107020079 A CN107020079 A CN 107020079A CN 201610069412 A CN201610069412 A CN 201610069412A CN 107020079 A CN107020079 A CN 107020079A
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- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- 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
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- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- Engineering & Computer Science (AREA)
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of denitrating catalyst, including, the catalyst substrate of multi-layer ceramics glass fibre, and dry the catalyst layer to be formed in the catalyst substrate surface impregnation, the surface and inside of the catalyst substrate are respectively provided with irregular hole, and porosity is 35% 40%, the catalyst layer is by containing V2O5, WO3, TiO2, MoO3And CeO2Mixture solution formation.The denitrating catalyst of the present invention can conveniently and efficiently realize denitration dust collecting, and simple in construction, easy to use, production cost is low, is easy to promote the use of；Boiler smoke can be made to realize stable catalytic reduction reaction between 80 240 DEG C；Catalyst installs simple, once damaging, changes convenient, saves cost；In addition, specific surface area of catalyst is big, intensity is high, on the premise of denitration effect is ensured, resistance to corrosion, anti-smoke-shock ability etc. are better than traditional cellular catalyst.
Description
Technical field
The invention belongs to environmental technology field, and in particular to a kind of denitrating catalyst.
Background technology
With the rapid development of economy, China is because of coal fire discharged sulfur dioxide (SO2) and nitrogen oxides (NOx) sharply increase, sulfur dioxide, nitrogen oxides are the main matters of atmosphere pollution.The annual NO of China according to statisticsx、SO2Discharge capacity respectively may be about 7,700,000 tons and 24,000,000 tons, NOx、SO2It is the one of the main reasons to form " acid rain " and " acid mist ", nitrogen oxides combines to form photochemical fog with hydrocarbon, so NOx、SO2It is seriously polluted to jeopardize health, natural environment is caused serious harm.China is annual because of NOx、SO2And the loss that formation acid rain is caused, up to 110,000,000,000 yuan, its loss accounts for the 7%~8% of national economy total output value.NOx90% come from fuel combustion, therefore desulfurization removing nitric and dedusting be administer pollution that caused by coal burning improve atmospheric environment main target.Gu sulphur denitration technology is that a certain amount of solid sulphur denitrfying agent is added in coal, gaseous sulphide and nitrogen oxides that coal is generated in burning or gasification is set to be absorbed in stove, remaining sulfide and nitrogen oxides are contacted and absorbed with the desulfurization denitrification agent having just enter into stove in gas phase, SO in the gas so discharged2And NOxContent is greatly lowered.All SO that can be in combustion generated with coal2、SO3And NOxChemically or physically adsorption reaction is played, and the material that formation solid residue is stayed in coal ash can be as solid sulphur denitrfying agent.Gu sulphur denitrfying agent species is a lot, such as：Lime stone, dolomite, calcite, calcium oxide, magnesia, sodium carbonate, ammoniacal liquor and sodium hydroxide etc., but at present using it is most, cheap and easy to get be still calcium carbonate, calcium hydroxide etc., be commonly called as desulphurizer denitrfying agent.Sometimes such as numerous industrial waste of carbide slag, papermaking wastewater, boron mud is also selected.Conventional solid sulphur denitrfying agent is based on desulphurizer denitrfying agent, and it has the disadvantage that the utilization rate of solid sulphur denitrfying agent is low, Gu sulphur denitration reaction speed and Sulfur releasing speed are inconsistent.Addition is generally 1.5% or so, and addition is big, Gu sulphur denitration neutral and alkali material utilization is low, desulphurization denitration expense is too high, and the sulfate and nitrate generated by alkali substance reaction is easily decomposed, and causes solid sulphur denitration efficiency not high.Coal combustion and sulfur fixation denitration technology is the emission reduction SO of a suitable China's national situation2Technology, common desulphurizer denitrfying agent is cheap and easy to get, but its sulfur-fixing rate is relatively low, and sulfur-fixing rate at high temperature only has 20%~30%, and denitration also only has 30% or so.It is mainly in the market applied to stationary source tail-gas denitration and uses cellular catalyst.The catalyst has relatively low pressure drop, abrasion resistance properties and excellent denitration activity and is increasingly widely applied, but there are some shortcomings in existing cellular catalyst, its optimum working temperature is general at 300~450 DEG C, and in actual condition, flue-gas temperature is difficult to reach this temperature range, another heating source is also needed to obtain preferable denitration effect, so that cost is improved.In order to reach preferable denitration effect and sulfur resistive water repelling property, honeycomb type denitrification catalyst typically has higher hole density, but a large amount of water, sulfur dioxide and the dust contained in actual flue gas is easy to block catalyst, considerably increases the energy consumption of dynamical system.Therefore need to develop can have excellent denitration activity, sulfur resistive water repelling property at a lower temperature, and the catalyst with anti-dust blocking ability.
The production process of honeycomb type denitrification catalyst generally comprises following steps：Mixing → thick compacting → extrusion molding → cutting → drying → is calcined → is stacked to module.Wherein finished product is successively to be superimposed bar shaped Faveolate denitration catalyst monomer and pile is into module in module process is stacked to.Denitrating catalyst is a kind of expensive consumptive material, therefore, and denitrification catalyst module in use for some time, will be safeguarded and overhauled, and checks whether that generation burn into is blocked or damaged.Honeycomb type denitrification catalyst typically has higher hole density, because a large amount of water, sulfur dioxide and the dust that contain in flue gas are easy to block catalyst, considerably increases the energy consumption of dynamical system.Therefore need to develop can have excellent denitration activity, sulfur resistive water repelling property at a lower temperature, and the catalyst with anti-dust blocking ability.
The content of the invention
It is an object of the invention to provide a kind of denitrating catalyst, the catalyst is corrosion-free to boiler, can effectively reduce the activation energy of coal-fired oxidation reaction, coal-fired oxidation rate is improved, makes coal-fired fully burning, and nitrogen oxides compound is passed through into chemical reaction, reduction generation nitrogen and water, meet the requirement of environmental protection.
Realize that the technical scheme of the object of the invention is as follows：A kind of denitrating catalyst, including, the catalyst substrate of multi-layer ceramics glass fibre, and in the catalyst substrate surface impregnation, the catalyst layer of drying and calcination formation, the surface and inside of the catalyst substrate are respectively provided with irregular hole, and porosity is 35%-40%, the catalyst layer is by containing V2O5, WO3, TiO2, MoO3And CeO2Mixture solution formation.
Further, the mass ratio of each component is V in the mixture solution2O510-20%, WO35-10%, TiO220-30%, MoO32-6% and CeO22-6%.
Further, the catalyst substrate is corrugated sheet material.
Further, the thickness in monolayer of the catalyst substrate is 0.5 millimeter -1.5 millimeters.
Further, the length of the catalyst substrate is 500 millimeters -1500 millimeters.
Compared with prior art, denitrating catalyst of the invention can conveniently and efficiently realize denitration dust collecting, denitration efficiency can be brought up into 30%.And simple in construction, easy to use, production cost is low, it is easy to promote the use of；Boiler smoke can be made to realize stable catalytic reduction reaction between 80-240 DEG C.Catalyst installs simple, once damaging, changes convenient, saves cost.In addition, specific surface area of catalyst is big, intensity is high, on the premise of denitration effect is ensured, resistance to corrosion, anti-smoke-shock ability etc. are better than traditional cellular catalyst.
Technical scheme is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the structural representation of denitrating catalyst of the present invention；
Fig. 2 is the hole schematic diagram in denitrating catalyst of the present invention.
In figure：1st, catalyst substrate, 2, catalyst layer, 3, hole
Embodiment
Fig. 1 is the structural representation of denitrating catalyst of the present invention, Fig. 2 is the hole schematic diagram in denitrating catalyst of the present invention, as depicted in figs. 1 and 2, the present invention provides a kind of denitrating catalyst, including, the catalyst substrate 1 of multi-layer ceramics glass fibre, and in the catalyst substrate surface impregnation, the catalyst layer 2 of drying and calcination formation, the surface and inside of the catalyst substrate are respectively provided with irregular hole 3, and porosity is 35%-40%, and the catalyst layer is by containing V2O5, WO3, TiO2, MoO3And CeO2Mixture solution formation.The mass ratio of each component is V in the mixture solution2O510-20%, WO35-10%, TiO220-30%, MoO32-6% and CeO22-6%.The catalyst substrate 1 is corrugated sheet material.The thickness in monolayer of the catalyst substrate 1 is 0.5 millimeter -1.5 millimeters.The length of the catalyst substrate 1 is 500 millimeters -1500 millimeters.
The preparation method of denitrating catalyst of the present invention, comprises the following steps：
(1) using glass-ceramic fiber production catalyst substrate；
(2) catalyst substrate produced using the mixture solution impregnation steps (1) containing the various components of catalyst；
(3) step (2) impregnated catalyst substrate is dried；
(4) calcine.
The mixture solution includes V2O510-20%, WO35-10%, TiO220-30%, MoO32-6% and CeO22-6%.
Embodiment 1
Above-mentioned denitrating catalyst, wherein the porosity of the catalyst substrate is 35%, thickness in monolayer is 1 millimeter, and length is 1500 millimeters.The catalyst layer is formed by mixture solution, and wherein the mass ratio of each component is V2O510%, WO35%, TiO220%, MoO32% and CeO26%.
Embodiment 2
Above-mentioned denitrating catalyst, wherein the porosity of the catalyst substrate is 40%, thickness in monolayer is 1.5 millimeters, and length is 500 millimeters.The catalyst layer is formed by mixture solution, and wherein the mass ratio of each component is V2O520%, WO310%, TiO230%, MoO36% and CeO24%.
Embodiment 3
Above-mentioned denitrating catalyst, wherein the porosity of the catalyst substrate is 40%, thickness in monolayer is 0.5 millimeter, and length is 500 millimeters.The catalyst layer is formed by mixture solution, and wherein the mass ratio of each component is V2O515%, WO37.5%, TiO225%, MoO34% and CeO22%.
Embodiment 4
Above-mentioned denitrating catalyst, wherein the porosity of the catalyst substrate is 38%, thickness in monolayer is 1.5 millimeters, and length is 800 millimeters.The catalyst layer is formed by mixture solution, and wherein the mass ratio of each component is V2O515%, WO37.5%, TiO222%, MoO33% and CeO25%.
Embodiment 5
Above-mentioned denitrating catalyst, wherein the porosity of the catalyst substrate is 35%, thickness in monolayer is 1 millimeter, and length is 700 millimeters.The catalyst layer is formed by mixture solution, and wherein the mass ratio of each component is V2O518%, WO37.5%, TiO228%, MoO35% and CeO23%.
Embodiment 6
Above-mentioned denitrating catalyst, wherein the porosity of the catalyst substrate is 37%, thickness in monolayer is 0.5 millimeter, and length is 1500 millimeters.The catalyst layer is formed by mixture solution, and wherein the mass ratio of each component is V2O518%, WO39%, TiO230%, MoO32% and CeO24%.
Described above is only some embodiments of the present invention; it should be understood that; it can be subject to some changes not departing from the scope of the present invention for those skilled in the art; therefore the structure shown in described above included and accompanying drawing should be regarded as exemplary, and it is not used to limit the protection domain of patent of the present invention.
Claims (5)
1. a kind of denitrating catalyst, it is characterised in that urging including, multi-layer ceramics glass fibre
Agent base material, and in the catalyst substrate surface impregnation, the catalysis of drying and calcination formation
Oxidant layer, the surface and inside of the catalyst substrate are respectively provided with irregular hole, and porosity is
35%-40%, the catalyst layer is by containing V2O5, WO3, TiO2, MoO3And CeO2
Mixture solution formation.
2. denitrating catalyst according to claim 1, it is characterised in that the mixture is molten
The mass ratio of each component is V in liquid2O510-20%, WO35-10%, TiO220-30%,
MoO32-6% and CeO22-6%.
3. denitrating catalyst according to claim 1, it is characterised in that the catalyst base
Material is corrugated sheet material.
4. denitrating catalyst according to claim 1, it is characterised in that the catalyst base
The thickness in monolayer of material is 0.5 millimeter -1.5 millimeters.
5. denitrating catalyst according to claim 1, it is characterised in that the catalyst base
The length of material is 500 millimeters -1500 millimeters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610069412.XA CN107020079A (en) | 2016-02-01 | 2016-02-01 | A kind of denitrating catalyst |
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| CN201610069412.XA CN107020079A (en) | 2016-02-01 | 2016-02-01 | A kind of denitrating catalyst |
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| CN107020079A true CN107020079A (en) | 2017-08-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108619902A (en) * | 2018-05-09 | 2018-10-09 | 启源（西安）大荣环保科技有限公司 | A kind of Gas Generator Set corrugated SCR denitration and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012097558A (en) * | 2011-12-28 | 2012-05-24 | Taruno Kazuo | Solid nitrogen plastic glass fiber panel |
| CN102974340A (en) * | 2012-11-22 | 2013-03-20 | 中节能六合天融环保科技有限公司 | Preparation method of cellular V-Ti low-temperature smoke denitration catalyst |
| CN103252231A (en) * | 2013-05-02 | 2013-08-21 | 易能(中国)环保科技有限公司 | Denitration catalyst and preparation method thereof |
| CN104148055A (en) * | 2014-08-22 | 2014-11-19 | 北京中南亚太环境科技发展有限公司 | Denitration catalyst |
| CN104857969A (en) * | 2015-04-28 | 2015-08-26 | 北京中南亚太环境科技发展有限公司 | Denitration catalyst and preparation method |
-
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- 2016-02-01 CN CN201610069412.XA patent/CN107020079A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012097558A (en) * | 2011-12-28 | 2012-05-24 | Taruno Kazuo | Solid nitrogen plastic glass fiber panel |
| CN102974340A (en) * | 2012-11-22 | 2013-03-20 | 中节能六合天融环保科技有限公司 | Preparation method of cellular V-Ti low-temperature smoke denitration catalyst |
| CN103252231A (en) * | 2013-05-02 | 2013-08-21 | 易能(中国)环保科技有限公司 | Denitration catalyst and preparation method thereof |
| CN104148055A (en) * | 2014-08-22 | 2014-11-19 | 北京中南亚太环境科技发展有限公司 | Denitration catalyst |
| CN104857969A (en) * | 2015-04-28 | 2015-08-26 | 北京中南亚太环境科技发展有限公司 | Denitration catalyst and preparation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108619902A (en) * | 2018-05-09 | 2018-10-09 | 启源（西安）大荣环保科技有限公司 | A kind of Gas Generator Set corrugated SCR denitration and preparation method thereof |
| CN108619902B (en) * | 2018-05-09 | 2021-08-03 | 启源（西安）大荣环保科技有限公司 | Corrugated SCR denitration catalyst for gas unit and preparation method thereof |
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Application publication date: 20170808 |