CN204601993U - Double-deck smoke filtration element - Google Patents
Double-deck smoke filtration element Download PDFInfo
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- CN204601993U CN204601993U CN201520227039.7U CN201520227039U CN204601993U CN 204601993 U CN204601993 U CN 204601993U CN 201520227039 U CN201520227039 U CN 201520227039U CN 204601993 U CN204601993 U CN 204601993U
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- filter core
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- filtration element
- internal layer
- smoke filtration
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Abstract
The utility model relates to double-deck smoke filtration element, and comprise the outer filter core and internal layer filter core all with porous metals filter course, internal layer filter core is fixed in the cavity of outer filter core, covers catalytic specie on the surface of internal layer filter core.Double-deck smoke filtration element of the present utility model, the equipment of the filtration of ash-laden gas and catalytic reduction can be integrated, simplify existing equipment and process largely, the work of whole filtration system can not be affected when simple fault appears in outer filter core, the efficiency that improve fume treatment of highly significant simultaneously.
Description
Technical field
The utility model relates to double-deck smoke filtration element, is the smoke filtration element with two-layer filtration concretely, is particularly suitable for but not only limits the use of in in high-temperature gas denitration.
Background technology
The useless smoke processing system of current most coal-burning power plant and coal chemical industry enterprises all has gas solid separation system, SCR catalytic reaction system and other subsystem, such as, have pulverized-coal fired boiler, smokejack, flue gas gaseous mixture, Benitration reactor etc.And normal containing a large amount of dust and nitrogen oxide in industrial furnace gas, the furnace gas of such as coal-fired plant boiler, the nitrogen oxide contained by it is the main cause of facilitating acid rain to be formed, and also containing the dust of tens of grams in the furnace gas of general often liter of coal-fired plant boiler.The usual method taked for the purification of the contour dust of furnace gas of such as coal-fired plant boiler and the industrial furnace gas of amount of nitrogen oxides is: first furnace gas is introduced SCR reactor (also needs to inject reducing agent in furnace gas in process furnace gas being introduced SCR reactor, this reducing agent is generally ammoniacal liquor) thus be harmless nitrogen gas by reduction of nitrogen oxide, realize furnace gas denitration purification, then the furnace gas after denitration is introduced electric cleaner to remove the dust in furnace gas, then discharge after the gas after dedusting is introduced desulfurizing tower desulfurizing and purifying.Said term " SCR " refers to Selective Catalytic Reduction, i.e. SCR.
Catalyst in above-mentioned SCR reactor is the key factor affecting the overall denitration effect of SCR system.The SCR catalyst of initial exploitation is graininess, then mainly adopts cellular or tabular catalyst at present.Honeycombed catalyst and tabular catalyst are all placed with numerous checkerwork cell passed through for flue gas, the large I of these checkerwork cells is selected according to the concentration of dust in flue gas and size, during use, flue gas flows to the opposite side of catalyst by the passage be made up of these checkerwork cells from the side of catalyst, flue gas contacts with the catalytic active substance on checkerwork cell inwall therebetween, thus is harmless nitrogen gas by the reduction of nitrogen oxide in flue gas.Above-mentioned honeycombed catalyst and tabular catalyst are generally made up of carrier and catalytic active layer, wherein carrier is first made into cellular or tabular (general employing is extruded), and then on carrier, adhere to the catalytic active layer be made up of catalytic active substance.
But but due to SCR catalyst be directly with the smoke contacts of high dustiness, if directly carry out catalysis to ash-laden gas to be easy to cause catalytic active substance poisoning, and because flue gas is to the friction of catalyst and impact, easily cause catalyst to ftracture even to come off, make the lost of life of catalyst.If first by ash-laden gas by carrying out catalytic reduction reaction again after filter element filtering, different with the equipment of catalysis owing to filtering, each equipment is respectively only to be disperseed, and is unfavorable for very much procedure operation and maintenance.
Meanwhile, there is the faults such as damage or fracture when single filter core after, namely cause whole filtration system fault, and usually more difficult and loaded down with trivial details to the investigation of fault, need to check one by one all filter cores, waste time and energy.
Utility model content
The utility model provides a kind of double-deck smoke filtration element, enables to complete in a system the filtration of ash-laden gas and catalytic reduction, and still can carry out normal filtration when outer filter core breaks down.
Double-deck smoke filtration element of the present utility model, comprise the outer filter core and internal layer filter core all with porous metals filter course, outer filter core is mainly used in acting on uniformly to flue gas ash removal and by gas and vapor permeation, internal layer filter core is fixed in the cavity of outer filter core, is covered with catalytic specie on the surface of internal layer filter core.Porous metals are existing a kind of metal materials, are that a kind of inside has the metal of many average pore sizes at the tiny micropore of 1 ~ 200 μm.Porous metals can be single metal, and also can be intermetallic compound, intermetallic compound also makes solid-phase relate to metal, is the compound be made up of two or more metal.The outer filter core that intermetallic compound is formed has the advantage of highly significant in high temperature air filtration.The surface of internal layer filter core is covered with catalytic specie, when flue gas falls after granule foreign wherein through outer filter element filtering, granule foreign in flue gas is obtained for filtration substantially, and the uniformity of the gas filtered is significantly improved, and safe catalytic reaction can be carried out with the catalytic specie of internal layer cartridge surface, internal layer filter core also further filters flue gas simultaneously, the dust impurities of further filtration residue.And after there is the faults such as damage, fracture when outer filter core, internal layer filter core still can normally work, can not affect to whole filtration system and break down, such as, after expendable blocking appears in outer filter core, outer filter core can be removed and continue to use after new outer filter core is installed.Double-deck smoke filtration element of the present invention is also suitable for and at high temperature filters flue gas, and such as, when carrying out SCR denitration to flue gas, catalytic specie can be with TiO
2for base material, with V
2o
5for main active ingredient, with WO
3, MoO
3for anti-oxidant and antitoxinization auxiliary ingredients are formed.During other fume treatment, select existing corresponding catalytic specie.
The structure of the utility model filter element seems simple, but the distinct device of current different operation can be integrated, but also catalytic specie can be avoided directly to contact ash-laden gas and poison deactivation, also normal operating conditions can be kept when simple fault appears in filter core, this is obtained for huge raising in industrial management efficiency and fume treatment efficiency, this does not possess in the fume treatment of traditional approach, is simultaneously that manufacturing enterprise creates significant economic benefit due to the raising of various efficiency.
Further, in the pure qi (oxygen) chamber of internal layer filter core, be filled with described catalytic specie, can the harmful components in flue gas be reacted more fully like this, effectively avoid the catalytic specie of internal layer cartridge surface and smoke reaction insufficient.
Further, be provided with erection joint in the end of double-deck smoke filtration element, can conveniently double-deck filter core be connected with the miscellaneous equipment in the filters such as card like this.
Wherein a kind of syndeton is, described erection joint is connected to the end of double-deck smoke filtration element by helicitic texture.This mode structure is simple, easy accessibility, but likely there will be the poorly sealed close problem in threaded connection place.
Another kind of syndeton is that described erection joint is connected to the end of double-deck smoke filtration element by flange arrangement, can ensure the sealing of junction equally, and unit replacement is also simple and convenient.
The utility model additionally provides a kind of preparation method for above-mentioned double medium filtration element, includes outer filter core and makes and the making of internal layer filter core.Wherein metafiltration core makes outside is that first in metal dust, adding granulation agent, is metallic particles by metal powder preparation; Then described metallic particles is compressed to outer filter core pressed compact under the isostatic cool pressing environment of such as 100 ~ 300MPa, described outer filter core pressed compact is sintered to the outer filter core of porous metal structure.Isostatic cool pressing is a kind of conventional compact technique, is the material that will load in sealing, elastic mould, is placed in the container of carrying liquid or gas, applies with certain pressure, material is pressed into entity, obtains the base substrate of original-shape with liquid or gas to it.After earth pressure release, mould is taken out in container, after the demoulding, as required base substrate is being made further Shape correction.During sintering, filter core pressed compact can be the filter core with porous metal structure by vacuum-sintering at the temperature of 950 DEG C ~ 1300 DEG C, and wherein sintering temperature can also be 1000 DEG C ~ 1200 DEG C.
The step that internal layer filter core makes includes: a, prepare the filtering layer matrix of loose structure; B, be configured for the colloidal sol of the carrier be overlying on described filtering layer matrix, then by filtering layer matrix impregnates in described colloidal sol, then make the collosol and gel in filtering layer matrix, then the filtering layer matrix of the described gel of attachment is heat-treated, make gel conversion be nano particle; C, configuration catalytic specie solution, then by be covered with gel nano particles be the filtering layer matrix impregnates of carrier in described catalytic specie solution, then the filtering layer matrix being attached with catalytic specie solution is heat-treated, described filtering layer matrix forms Catalytic Layer; Finally internal layer filter core is fixed in the cavity of outer filter core.
Further, catalytic specie is packed in the pure qi (oxygen) chamber of described internal layer filter core, flue gas can be made like this to be reacted more fully.
Concrete, the metal dust described in when making outer filter core comprises iron powder and aluminium powder, and wherein the weight ratio of iron powder is 40 ~ 80%, and the weight ratio of aluminium powder is 15 ~ 30%, and other metal dust that weight ratio is less than 20%.The particle diameter of metal dust is 100 ~ 400 orders, the filter element filtering better effects if produced like this, and the outer filter core of this intermetallic compound structure more can be applicable to the filtration to high-temperature gas simultaneously.
Concrete, the pH value making described colloidal sol during internal layer filter core is 2 ~ 4, and the dipping of filtering layer matrix and colloidal sol is roughly 10 ~ 15 minutes, then at 60 DEG C ~ 90 DEG C, is incubated at least 2 hours.Dipping so repeatedly, insulation, until collosol and gel.
Concrete, the filtering layer matrix being covered with gel nano particles floods after 10 ~ 20 minutes and carries out described heat treatment again in catalytic specie solution.In catalytic specie, activating agent and/or the co-catalyst of > 5% total amount ratio can also be comprised, to reach better catalytic reaction effect.
After tested, double-deck smoke filtration element of the present utility model, the equipment of the filtration of ash-laden gas and catalytic reduction can be integrated, simplify existing equipment and process largely, the work of whole filtration system can not be affected when simple fault appears in outer filter core, the efficiency that improve fume treatment of highly significant simultaneously.To in flue-gas denitration process, denitration temperature adopts 300 DEG C ~ 400 DEG C, denitration rate>=80% obtained, SO
2conversion ratio≤2%, reaches very outstanding denitration effect, and is that whole operation reduces a large amount of production costs by the device structure of integration, for manufacturing enterprise creates obviously economic benefit.
Below in conjunction with the detailed description of the invention of embodiment, foregoing of the present utility model is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the utility model is only limitted to following example.Do not departing from the above-mentioned technological thought situation of the utility model, the various replacement made according to ordinary skill knowledge and customary means or change, all should be included in scope of the present utility model.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of double-deck smoke filtration element of the present utility model.
Fig. 2 is the another kind of structural representation of double-deck smoke filtration element of the present utility model.
Detailed description of the invention
Embodiment 1:
Double-deck smoke filtration element of the present utility model as shown in Figure 1, include the outer filter core 1 and internal layer filter core 2 that all have and have porous metals filter course, the catalytic specie 3 of SCR (SCR) is covered with at the filtering layer inner surface of internal layer filter core 2, meanwhile, described catalytic specie 3 is also filled with in the pure qi (oxygen) chamber in internal layer filter core 2.Catalytic specie 3 can be with TiO
2for base material, with V
2o
5for main active ingredient, with WO
3, MoO
3for anti-oxidant and antitoxinization auxiliary ingredients are formed.Also be provided with erection joint 4 in the end of double-deck smoke filtration element, for being connected with the card in filter, erection joint 4 is fastenedly connected by helicitic texture 41 and filter core end, upper strata.
When making above-mentioned outer filter core 1, first particle diameter to be 100 order proportions be 20% aluminium powder, particle diameter be 200 order proportions be the iron powder of 75%, and proportion is add granulation agent in the metal dust of other powder of 5%, is metallic particles by metal powder preparation; Then described metallic particles is compressed to outer filter core pressed compact under the isostatic cool pressing environment of 100 ~ 300MPa, more described outer filter core pressed compact is sintered to the outer filter core 1 of porous metal structure at 950 DEG C ~ 1300 DEG C temperature.After testing, its flux is 368m to so outer filter core 1 sintered out
3/ m
2.h.kpa, the average pore size of filter opening is 65um, and normal temperature tension reaches 90MPa, and the tension at 600 DEG C is 75MPa, and porosity is 42%.
When making internal layer filter core 2, step includes: a, can by TiO
2nano particle, Al
2o
3nano particle, ZrO
2nano particle or SiO
2nano particle prepares the filtering layer matrix of loose structure.TiO
2, Al
2o
3, ZrO
2and SiO
2proved to have good result of use as the carrier material in existing honeycombed catalyst and tabular catalyst, the precursor solution passing through butyl titanate in the present embodiment obtains TiO
2nano particle; B, be configured for the colloidal sol of the carrier be overlying on described filtering layer matrix.Described butyl titanate is add the 2:1:20 mixing in mass ratio of deionized water, alcohol and nitric acid in the precursor solution of raw material, and adjustment acid content control ph is 4, and colloidal sol is met the demands.Again by filtering layer matrix impregnates to described colloidal sol 10 ~ 15 minutes, then at 60 DEG C ~ 90 DEG C, be incubated at least 2 hours.Dipping so repeatedly, insulation, until the collosol and gel in filtering layer matrix, then put into resistance furnace heat-treat the filtering layer matrix of the described gel of attachment, make gel conversion be nano particle; C, adopt ammonium paratungstate and ammonium metavanadate preparation configuration catalytic specie before drive liquid solution, be that the filtering layer matrix impregnates of carrier is in described catalytic specie precursor solution after 10 ~ 20 minutes by being covered with gel nano particles again, then in resistance furnace, the filtering layer matrix being attached with catalytic specie precursor solution is heat-treated, described filtering layer matrix forms Catalytic Layer.In catalytic specie, activating agent and/or the co-catalyst of > 5% total amount ratio can also be comprised, to reach better catalytic reaction effect.
Finally described SCR catalytic specie is packed in the pure qi (oxygen) chamber of described internal layer filter core 2.For to flue-gas denitration process, denitration temperature is 350 DEG C, denitration rate>=80% obtained, SO
2conversion ratio≤2%, reaches very outstanding denitration effect.Embodiment 2:
As shown in Figure 2, on the basis of embodiment 1, described erection joint 4 is connected with the end of double-deck smoke filtration element by flange arrangement 42, the same like this sealing that can ensure between erection joint 4 and outer filter core 1, and easy accessibility.
Claims (5)
1. double-deck smoke filtration element, it is characterized by: comprise the outer filter core (1) and internal layer filter core (2) all with porous metals filter course, internal layer filter core (2) is fixed in the cavity of outer filter core (1), covers catalytic specie (3) on the surface of internal layer filter core (2).
2. double-deck smoke filtration element as claimed in claim 1, is characterized by: in the pure qi (oxygen) chamber of internal layer filter core (2), be filled with described catalytic specie (3).
3. double-deck smoke filtration element as claimed in claim 1 or 2, is characterized by: be provided with erection joint (4) in the end of double-deck smoke filtration element.
4. double-deck smoke filtration element as claimed in claim 3, is characterized by: described erection joint (4) is connected to the end of double-deck smoke filtration element by helicitic texture (41).
5. double-deck smoke filtration element as claimed in claim 3, is characterized by: described erection joint (4) is connected to the end of double-deck smoke filtration element by flange arrangement (42).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520227039.7U CN204601993U (en) | 2015-04-15 | 2015-04-15 | Double-deck smoke filtration element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520227039.7U CN204601993U (en) | 2015-04-15 | 2015-04-15 | Double-deck smoke filtration element |
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| Publication Number | Publication Date |
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| CN204601993U true CN204601993U (en) | 2015-09-02 |
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ID=53954583
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826486A (en) * | 2015-04-15 | 2015-08-12 | 成都易态科技有限公司 | Double layer flue gas filtering element and making method thereof |
-
2015
- 2015-04-15 CN CN201520227039.7U patent/CN204601993U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826486A (en) * | 2015-04-15 | 2015-08-12 | 成都易态科技有限公司 | Double layer flue gas filtering element and making method thereof |
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| GR01 | Patent grant |