CN104324717A - Catalyst for removing dioxin in garbage incinerator waste gas and preparation method thereof - Google Patents
Catalyst for removing dioxin in garbage incinerator waste gas and preparation method thereof Download PDFInfo
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- CN104324717A CN104324717A CN201410427982.2A CN201410427982A CN104324717A CN 104324717 A CN104324717 A CN 104324717A CN 201410427982 A CN201410427982 A CN 201410427982A CN 104324717 A CN104324717 A CN 104324717A
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Abstract
The invention relates to a catalyst for removing dioxin in garbage incinerator waste gas, and belongs to the field of catalysts for treating waste gas. The provided catalyst comprises a carrier and active components, and is characterized in that the active components are one or more elements of vanadium, tungsten, silver, copper, manganese, iron, nickel, strontium, and cesium, the carrier has a honeybee comb structure and contains titanium dioxide, and the walls in the honeybee comb structure contain micropore groups. Through normalizing the pore structure of the catalyst, the catalyst will not be easily obstructed by the dusts in waste gas generated during the garbage burning process. At the same time, the micropore groups arranged in the walls among pores enlarge the specific area, and thus the contact surface between the waste gas and the catalyst is enlarged, so the dioxin removing rate is increased.
Description
Technical field
The present invention relates to a kind of catalyst administering waste gas, particularly relate to a kind of Catalysts and its preparation method removing dioxin in waste incineration furnace exhaust.
Background technology
A large amount of aromatic series organic matters and chlorinated organics is contained in urban life and industrial refuse, these discarded objects can produce a large amount of dioxin pollution things when burning, prove on evidence, dioxin has severe toxicity, can cause body cell canceration and the gene mutation of human or animal, be class persistence organic pollutant environment for human survival being formed to new harm.Because waste incineration is the root producing dioxin, the waste gas that stove of therefore burning away the refuse produces before discharge, must be removed the dioxin and other organic gas that wherein contain, avoid bringing secondary pollution to environment.
The removal of dioxin is the method adopting chemistry, and under the effect of catalyst, dioxin is oxidized by oxygen at low temperatures, generates the inorganic harmless objects such as CO2, H2O and HCL.The flat 10-235191A of Japan Patent discloses a kind of catalyst removing dioxin, using titanium dioxide as its part in this catalyst, and containing a large amount of pores, pore pore-size distribution is at scope 0.01-0.05 micron, and containing a large amount of holes in pore wall, its Pore size distribution is at scope 0.1-0.8 micron.Also containing one or more in molybdenum oxide, silica, tungsten oxide and vanadium oxide in this catalyst.But the industrializeding catalyst product of furnace exhaust of burning away the refuse as process, the shape of its pore and the distribution situation of hole will affect the result of use of catalyst.Pore is too little, and the dust in waste gas, easily by clogging of pores, makes catalyst failure, and irregular pore shape also easily blocks, and pore is too large, and the specific area of catalyst is little, and its catalyst effect is not played well.
Summary of the invention
For the deficiency in above-mentioned field, the invention provides a kind of catalyst removing dioxin in waste incineration furnace exhaust, there is regular pore, its pore size is moderate simultaneously, not easily block, between its pore wall pore little and amount many, its specific area is increased, improve the efficiency of the removal dioxin of catalyst, also extend service life simultaneously.
Remove a catalyst for dioxin in waste incineration furnace exhaust, comprise carrier and active component, it is characterized in that: described active component is one or more in following metal oxide: vanadium, tungsten, silver, copper, manganese, iron, nickel, strontium, caesium; Described carrier is the honeycomb containing titanium dioxide content, and described honeycomb partition contains micropore group.
The aperture of described honeycomb is 1-7mm, wall thickness 0.3-1.2mm between honeycomb, and the aperture of micropore group is less than 80nm, and the number that its mesoporous is less than 50nm accounts for more than 80% of micropore group quantity.
Also containing one or more in silica, tungsten oxide, strontium oxide strontia, molybdenum oxide in described catalyst carrier.
The preparation method of above-mentioned catalyst, is prepared into the honeycomb with micropore group by carrier material, then by active ingredient adsorption on carrier.
The present invention is by the pore shape of specification catalyst, catalyst of the present invention is not easily blocked by the dust in waste gas when processing and burning away the refuse waste gas, the micropore group in pore partition is set simultaneously, its specific area is increased, improve the contact area with waste gas, improve the clearance of dioxin.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
1,1 preparation Ti-Si composite oxide powder Ludox (commercially available, the SiO2 containing 30%) 10Kg with add 73 premium on currency hybrid modulation in industrial ammoniacal liquor (NH3 containing 25%) 104Kg and become balanced solution.Under agitation, in this solution, slowly instill the sulfuric acid solution (containing TiO270g/L, H2SO4287g/L) 243 liters of titanium sulfate, obtain a dirty solution, leave standstill and filter after 20 hours and wash, then dry 1 hour with the temperature of 150 DEG C.At the roasting temperature 5 hours of 550 DEG C, pulverize with beater grinder and obtain powder.The Ti-Si composite oxide powder of such making, its composition is TiO2:SiO2=85:15 (oxide weight ratio).
1,2 carrier Ti-Si composite oxide powder 20Kg is made, oxalic acid 1.7Kg, an ethanol ammonia 0.4Kg, becomes solution with 5 liter of water, add that molybdenum trioxide powder 1.11Kg helps drug to mix with shaping, making aperture with the mixing rear extrusion molding machine of blade mixer is that 5mmr is cellular.Temperature calcination at 530 DEG C after the molding obtained dries with the temperature of 60 DEG C obtained carrier of the present invention after 5 hours.This composition by oxide converted weight ratio is, Ti-Si composite oxides: MoO3=95:5.
1, the ammonium metavanadate of 3 Kaolinite Preparation of Catalyst 500g, 300g ammonium tungstate and 60g ammonium tungstate are dissolved in the ammonia spirit of the oxalic acid of 1.5 liter 20% and 3.0 liter 10%, with the above-mentioned carrier of this solution impregnation, dip time is 20 minutes, solid-like at 100 DEG C dry 4 hours, then at 500 DEG C, roasting obtains catalyst of the present invention in 4 hours.
Detect above-mentioned catalyst, show that its honeycomb aperture is 5mm, honeycomb partition micropore is all less than 65nm, and the micropore being less than 50nm accounts for more than 90%, requirement according to the invention.
Experimental example 1:
Above-mentioned catalyst is loaded in a stainless steel reactor the industrial effluent experiment carrying out dioxin, reactor inlet connects an aspiration pump, and after pump is opened, the flue gas of dedusting just passes through beds with certain flow velocity.Gas sample acquisition performs GB18485-2001, and sample treatment and dioxin analysis perform the HJ/-77-2001 standard that national Chinese Ministry of Environmental Protection promulgates.
Claims (4)
1. remove a catalyst for dioxin in waste incineration furnace exhaust, comprise carrier and active component, it is characterized in that: described active component is one or more in following metal oxide: vanadium, tungsten, silver, copper, manganese, iron, nickel, strontium, caesium; Described carrier is the honeycomb containing titanium dioxide content, and described honeycomb partition contains micropore group.
2. the catalyst of dioxin in removal waste incineration furnace exhaust according to claim 1, the aperture of described honeycomb is 1-7mm, wall thickness 0.3-1.2mm between honeycomb, the aperture of micropore group is less than 80nm, and the number that its mesoporous is less than 50nm accounts for more than 80% of micropore group quantity.
3. the catalyst of dioxin in removal waste incineration furnace exhaust according to claim 2, also containing one or more in silica, tungsten oxide, strontium oxide strontia, molybdenum oxide in described catalyst carrier.
4. the preparation method of the catalyst of dioxin in claim 1-3 arbitrary removal waste incineration furnace exhaust, is characterized in that: carrier material is prepared into the honeycomb with micropore group, then by active ingredient adsorption on carrier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410427982.2A CN104324717B (en) | 2013-12-19 | 2014-08-27 | Remove the catalyst and preparation method thereof of dioxin in waste incineration furnace exhaust |
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| CN2013107060386 | 2013-12-19 | ||
| CN201310706038 | 2013-12-19 | ||
| CN201310706038.6 | 2013-12-19 | ||
| CN201410427982.2A CN104324717B (en) | 2013-12-19 | 2014-08-27 | Remove the catalyst and preparation method thereof of dioxin in waste incineration furnace exhaust |
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| CN104324717A true CN104324717A (en) | 2015-02-04 |
| CN104324717B CN104324717B (en) | 2019-03-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107649131A (en) * | 2017-10-18 | 2018-02-02 | 安徽工业大学 | A kind of picoline aoxidizes demethylation catalyst |
| CN112902193A (en) * | 2021-02-23 | 2021-06-04 | 山东大学 | Garbage incinerator system and catalytic removal method for garbage incineration flue gas purification hearth |
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| US6120747A (en) * | 1996-12-27 | 2000-09-19 | Nippon Shokubai Co., Ltd. | Catalyst for removing organic halogen compounds, preparation method therefor and method for removing organic halogen compounds |
| CN101428212A (en) * | 2008-12-04 | 2009-05-13 | 浙江大学 | Selective catalysis reduction denitrate catalyst for composite carrier flue gas and preparation method thereof |
| CN102068905A (en) * | 2010-12-20 | 2011-05-25 | 成都东方凯特瑞环保催化剂有限责任公司 | Catalyst for removing dioxin substance in flue gas and preparation method thereof |
| CN102166516A (en) * | 2011-03-10 | 2011-08-31 | 青岛华拓电力环保有限公司 | Catalytic agent for denitrating smoke and preparation technology thereof |
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2014
- 2014-08-27 CN CN201410427982.2A patent/CN104324717B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6120747A (en) * | 1996-12-27 | 2000-09-19 | Nippon Shokubai Co., Ltd. | Catalyst for removing organic halogen compounds, preparation method therefor and method for removing organic halogen compounds |
| CN101428212A (en) * | 2008-12-04 | 2009-05-13 | 浙江大学 | Selective catalysis reduction denitrate catalyst for composite carrier flue gas and preparation method thereof |
| CN102068905A (en) * | 2010-12-20 | 2011-05-25 | 成都东方凯特瑞环保催化剂有限责任公司 | Catalyst for removing dioxin substance in flue gas and preparation method thereof |
| CN102166516A (en) * | 2011-03-10 | 2011-08-31 | 青岛华拓电力环保有限公司 | Catalytic agent for denitrating smoke and preparation technology thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107649131A (en) * | 2017-10-18 | 2018-02-02 | 安徽工业大学 | A kind of picoline aoxidizes demethylation catalyst |
| CN112902193A (en) * | 2021-02-23 | 2021-06-04 | 山东大学 | Garbage incinerator system and catalytic removal method for garbage incineration flue gas purification hearth |
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| CN104324717B (en) | 2019-03-05 |
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Effective date of registration: 20190124 Address after: 210000 Dongzhuang Road, Wanlong Community, Xingdian Town, Pukou District, Nanjing, Jiangsu Province Applicant after: Nanjing environmental renewable energy Co., Ltd. Address before: 530007 room 1, 1 hatch building, 25 east section of new high road, Nanning, the Guangxi Zhuang Autonomous Region. Applicant before: NANNING CIHUI TECHNOLOGY CO., LTD. |
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