CN104826410B - Smoke filtration element and preparation method - Google Patents
Smoke filtration element and preparation method Download PDFInfo
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- CN104826410B CN104826410B CN201510178565.3A CN201510178565A CN104826410B CN 104826410 B CN104826410 B CN 104826410B CN 201510178565 A CN201510178565 A CN 201510178565A CN 104826410 B CN104826410 B CN 104826410B
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- filter core
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- filtration element
- smoke filtration
- flue gas
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- 238000001914 filtration Methods 0.000 title claims abstract description 33
- 239000000779 smoke Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 230000003197 catalytic effect Effects 0.000 claims abstract description 32
- 241000894007 species Species 0.000 claims abstract description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003546 flue gas Substances 0.000 claims abstract description 22
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 17
- 150000002739 metals Chemical class 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000008187 granular material Substances 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 claims description 17
- 239000013528 metallic particle Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000003517 fume Substances 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 239000003054 catalyst Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000013543 active substance Substances 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtering Materials (AREA)
- Catalysts (AREA)
Abstract
The present invention relates to smoke filtration element and preparation method, include, for filtering granule foreign and the filter core for porous metals filter course in flue gas, the clean air cavity in filter core being filled with and described harmful substances in flue gas can being reacted the catalytic specie for harmless components at filter element.Smoke filtration element of the present invention and preparation method, the equipment of the filtration of ash-laden gas and catalysis reduction can be integrated, simplify existing equipment and process largely, the efficiency that improve fume treatment of highly significant, and it is that whole operation reduces substantial amounts of production cost by the device structure of integration, creates obviously economic benefit for manufacturing enterprise.
Description
Technical field
The present invention relates to smoke filtration element and preparation method, be particularly suitable for but not only limit 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 catalysis
Reaction system and other subsystem, such as, have pulverized-coal fired boiler, smokejack, flue gas gaseous mixture, Benitration reactor etc..And
Often containing the furnace gas of a large amount of dust and nitrogen oxides, such as coal-fired plant boiler in industrial furnace gas, its contained nitrogen oxides is to promote
Become the main cause that acid rain is formed, and possibly together with the dust of tens of grams in the furnace gas of general every liter of coal-fired plant boiler.For such as
The usual method that the purification of the contour dust of furnace gas of coal-fired plant boiler and the industrial furnace gas of amount of nitrogen oxides is taked is: first will
Furnace gas introduces SCR reactor and (also needs to inject reducing agent during furnace gas introduces SCR reactor in furnace gas, should go back
Former dose is usually ammoniacal liquor) thus nitrogen oxides is reduced to harmless nitrogen gas, it is achieved furnace gas denitration purifies, then by the stove after denitration
Gas introducing electric cleaner is to remove the dust in furnace gas, then the gas after dedusting introduces discharge after desulfurizing tower desulfurizing and purifying.Described
Term " SCR " refer to Selective Catalytic Reduction, i.e. SCR.
Catalyst in above-mentioned SCR reactor is the key factor affecting SCR system entirety denitration effect.The SCR being originally developed
Catalyst is graininess, the cellular or tabular catalyst of main employing.On honeycombed catalyst and tabular catalyst
All being placed with and numerous be available for the checkerwork cell that flue gas passes through, the big I of these checkerwork cells is selected according to concentration and the size of dust in flue gas
Selecting, during use, flue gas flows to the opposite side of catalyst, flue gas therebetween from the side of catalyst by the passage being made up of these checkerwork cells
Contact with the catalytic active substance on checkerwork cell inwall, thus the nitrogen oxides in flue gas is reduced to harmless nitrogen gas.Above-mentioned honeycomb
Shape catalyst and tabular catalyst are typically made up of carrier and catalytic active layer, and wherein carrier is first made into cellular or tabular
(general employing is extruded), adheres to the catalytic active layer being made up of catalytic active substance the most again on carrier.
But owing to SCR catalyst is direct and high dustiness smoke contacts, hold very much if directly ash-laden gas is catalyzed
It is easily caused catalytic active substance poisoning, shortens service life.If first ash-laden gas being catalyzed by after filter element filtering again
Reduction reaction, different with the equipment of catalysis owing to filtering, the most solely dispersion of each equipment, it is highly detrimental to procedure operation and dimension
Protect.
Summary of the invention
The invention provides a kind of smoke filtration element and preparation method, enable the filtration to ash-laden gas and catalysis reduction one
Individual system completes, simplifies existing equipment and process, reduce energy loss and cost-effective, improve production efficiency.
The smoke filtration element of the present invention, including for filtering granule foreign in flue gas and the filter core for porous metals filter course,
Clean air cavity in filter core is filled with and described harmful substances in flue gas can be reacted the catalytic specie for harmless components.Wherein described
The filtering layer inner surface of porous metals can also be covered with catalytic specie.Porous metals are existing a kind of metal materials, are inside one
There is many average pore sizes metal at the tiny micropore of 1～200 μm.Porous metals can be single metal, it is also possible to for metal
Between compound, intermetallic compound also makes solid relate to metal mutually, is the compound being made up of two or more metal.Gold
The advantage that the filter core that between genus, compound is constituted has highly significant in high temperature air filtration.Catalytic specie is packed into the clean gas of filter core
In chamber, after flue gas falls granule foreign therein by filter element filtering, carry out catalysis reduction at once with the catalytic specie in clean air cavity
Reaction, is then discharged out.If when the filtering layer inner surface of filter element is also covered with catalytic specie, the catalytic specie on filtering layer just with
Flue gas after filtering layer filters reacts first, is had remnants in flue gas by the catalytic specie being seated in clean air cavity the most again
Pest matter is reacted further.This structure seems simple, but can be integrated by the distinct device of the most different operations,
Being obtained for huge raising in industrial management efficiency and fume treatment efficiency, this is not have in the fume treatment of traditional approach
Standby, simultaneously because the raising of various efficiency and be that manufacturing enterprise creates significant economic benefit.The filter element of the present invention is also
Can be suitable for and at high temperature filter flue gas, such as, when flue gas being carried out SCR denitration, catalytic specie can be with TiO2
For base material, with V2O5For main active ingredient, with WO3、MoO3Constitute for anti-oxidant and antitoxinization auxiliary ingredients.Other cigarette
During gas disposal, select existing corresponding catalytic specie.
Further, it is provided with erection joint in the end of filter core, so can facilitate other in the filters such as filter core and card
Equipment connects.
One of which attachment structure is, described erection joint is threadeded with filter core.This mode simple in construction, easy accessibility,
It is likely that there will be the poorly sealed close problem in threaded connection place.
Another kind of attachment structure is, described erection joint is connected by flange and filter core are fixing.The connected mode of flange arrangement is same
Sample ensure that the sealing of junction, and dismounts the most simple and convenient.In addition, erection joint can also pass through bonding grade side
Formula is connected with filter core.
Optionally, described catalytic specie fills in the catalysis cage of clean air cavity combination assembling, and the sidewall of described catalysis cage is provided with
Through hole.So at filling and taking-up catalytic specie, particularly can be very convenient during taking-up catalytic specie, directly will be equipped with urging
The catalysis cage of compound matter takes out, and can also avoid catalytic specie that filter core inwall is caused secondary pollution simultaneously.
Present invention also offers a kind of preparation method for above-mentioned filter element, include addition granulation agent in metal dust,
Metal dust is prepared as metallic particles；Then described metallic particles is compressed under pressure environment filter core pressed compact, then by described
Filter core pressed compact is sintered to the filter core of porous metal structure；Finally the Catalyst packing reacted with harmful substances in flue gas will be needed to enter institute
State in the clean air cavity of filter core.
Further, at least including iron powder and aluminium powder in described metal dust, wherein the weight ratio of iron powder is 40～80%, aluminium
The weight ratio of powder is 15～30%, according to the use environment of filter element, it is also possible to add weight ratio other metal less than 20%
Powder, such as chromium (Cr), nickel (Ni), silicon (Si) and other rare earth element (such as cerium, lanthanum, yttrium etc.).Other metal powder
End effect primarily to improve some characteristics of filter element filtering layer material, including decay resistance, toughness, mechanical property,
Distribution of pores and size etc. thereof, as added Cr, can be obviously improved the power such as the tensile strength of material, three-point bending resistance, crushing strength
Learn performance, additionally it is possible to be obviously improved material decay resistance under the adverse circumstances such as strong acid and strong base.Change between the metal so made
The filter core of laminate structures more can be suitable for the filtration to high-temperature gas.Whether adding other metal dust can be according to actual condition bar
Part specifically determines, if actual service conditions is gentleer, then can be without, if use environment relatively more severe (as sulfur-bearing,
Fluorine-containing or other acid-base environment), then must add respective metal powder, to ensure that filter element is applicable to this environment.
Preferably, described metallic particles is compressed to filter core pressed compact in the isostatic cool pressing environment that pressure is 100～300MPa.Cold
Isostatic pressed is a kind of conventional compact technique, be loaded into sealing, material in elastic mould, be placed in and contain liquid or gas
In container, with liquid or gas, it is applied with certain pressure, material is pressed into entity, obtains the base substrate of original-shape.
After pressure release, mould is taken out in container, after the demoulding, as required base substrate is being made further Shape correction.
Preferably, described filter core pressed compact passes through vacuum-sintering for having porous metal structure at a temperature of 950 DEG C～1300 DEG C
Filter core, wherein sintering temperature can also is that 1000 DEG C～1200 DEG C.
Further, the particle diameter of described metal dust is 100～400 mesh, and the filter element filtering effect so produced is more preferable.Have one
The particle diameter of the most special metal dust can also be micron order.
After tested, smoke filtration element of the present invention and preparation method, it is possible to by whole to the filtration of ash-laden gas and the equipment of catalysis reduction
It is integrated, simplifies existing equipment and process largely, the efficiency that improve fume treatment of highly significant.To cigarette
In gas denitrating technique, denitration temperature uses 300 DEG C～400 DEG C, obtained denitration rate >=80%, SO2Conversion ratio≤2%, reaches
Arrive the most outstanding denitration effect, and the device structure by integration be that whole operation reduces substantial amounts of production cost,
Obviously economic benefit is created for manufacturing enterprise.
Below in conjunction with the detailed description of the invention of embodiment, the foregoing of the present invention is described in further detail again.But should not
This is interpreted as, and the scope of the above-mentioned theme of the present invention is only limitted to Examples below.Without departing from the idea case in the present invention described above,
The various replacements made according to ordinary skill knowledge and customary means or change, all should be included within the scope of the invention.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of embodiment 1.
Fig. 2 is the another kind of structural representation of embodiment 1.
Fig. 3 is a kind of structural representation of embodiment 2.
Detailed description of the invention
Embodiment 1:
The smoke filtration element of the present invention as shown in Figure 1, including for filtering in flue gas granule foreign and having porous metals and filter
The filter core 1 of layer, is filled with the catalytic specie 3 of SCR (SCR) in the clean air cavity 2 in filter core 1.In order to reach
Higher efficiency and the catalytic reaction of effect, the filtering layer inner surface at described porous metals can also be covered with catalytic specie 3.Catalytic materials
Matter 3 can be with TiO2For base material, with V2O5For main active ingredient, with WO3、MoO3For anti-oxidant and antitoxinization auxiliary
Composition is constituted.Being provided with erection joint 4 in the end of filter core 1, for being connected with the card (orifice plate) in filter, installation connects
4 are fastenedly connected with filter core 1 helicitic texture 41.
When making above-mentioned filter element, first particle diameter be 100 mesh proportions be 20% aluminium powder, particle diameter be 200 mesh proportions be 75%
Iron powder, and in the metal dust of other powder that proportion is 5% add granulation agent, metal dust is prepared as metallic particles；
Then described metallic particles is compressed under the isostatic cool pressing environment of 100～300MPa filter core pressed compact, then by described filter core pressed compact
The filter core 1 of porous metal structure it is sintered at a temperature of 950 DEG C～1300 DEG C.The filter core 1 so sintered out after testing, its flux
For 368m3/m2.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,
Porosity is 42%.Finally described SCR catalytic specie is packed in the clean air cavity 2 of described filter core 1.With to denitrating flue gas
As a example by technique, denitration temperature is 350 DEG C, obtained denitration rate >=80%, SO2Conversion ratio≤2%, has reached the most outstanding
Denitration effect.
Embodiment 2:
As in figure 2 it is shown, on the basis of embodiment 1, described erection joint 4 is by flange arrangement 42 with filter core 1 combination even
Connect, to ensure the sealing between erection joint 4 and filter core 1.
Embodiment 3:
As it is shown on figure 3, on the basis of embodiment 1 or 2, described catalytic specie 3 fills in and the combination assembling of clean air cavity 2
In catalysis cage 5, the sidewall of described catalysis cage 5 is provided with through hole 51, is used for allowing flue gas contact with catalytic specie 3 and to react.This
Sample is in filling and takes out catalytic specie 3, particularly can be very convenient during taking-up catalytic specie 3, directly will be equipped with catalytic materials
The catalysis cage 5 of matter 3 takes out, and can also avoid catalytic specie 3 that filter core inwall is caused secondary pollution simultaneously.
Claims (9)
1. smoke filtration element, including for filtering granule foreign in flue gas and there is the filter core (1) of porous metals filter course, its
It is characterized as: being filled with in the clean air cavity (2) in filter core (1) can be harmless components by the reaction of described harmful substances in flue gas
Catalytic specie (3)；Described filter element includes and the catalysis cage (5) of clean air cavity (2) combination assembling, this catalysis cage (5)
Sidewall is provided with through hole (51), and described catalytic specie (3) fills in catalysis cage (5), is wherein catalyzed cage (5) and filter core
(1) releasable connection is used.
2. smoke filtration element as claimed in claim 1, is characterized by: be provided with erection joint (4) in the end of filter core (1).
3. smoke filtration element as claimed in claim 2, is characterized by: described erection joint (4) and filter core (1) spiral shell
Line connects.
4. smoke filtration element as claimed in claim 2, is characterized by: flange arrangement is passed through in described erection joint (4)
Fix with filter core (1) and be connected.
5., for the preparation method of the smoke filtration element described in one of Claims 1-4, its feature includes: at metal dust
Middle addition granulation agent, is prepared as metallic particles by metal dust；Then described metallic particles is compressed to filter core under pressure environment
Pressed compact, is sintered to the filter core of porous metal structure by described filter core pressed compact；The catalytic specie that will be able to react with harmful substances in flue gas
Fill in the catalysis cage assembled with the combination of clean air cavity.
6. preparation method as claimed in claim 5, is characterized by: at least include iron powder and aluminium powder in described metal dust,
Wherein the weight ratio of iron powder is 40～80%, and the weight ratio of aluminium powder is 15～30%.
7. preparation method as claimed in claim 5, is characterized by: described metallic particles is 100～300MPa at pressure
Isostatic cool pressing environment in be compressed to filter core pressed compact.
8. preparation method as claimed in claim 5, is characterized by: described filter core pressed compact is 950 DEG C～the temperature of 1300 DEG C
Under be the filter core with porous metal structure by vacuum-sintering.
9. the preparation method as described in one of claim 5 to 8, is characterized by: the particle diameter of described metal dust is 100～400
Mesh.
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| CN201510178565.3A CN104826410B (en) | 2015-04-15 | 2015-04-15 | Smoke filtration element and preparation method |
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| CN201510178565.3A CN104826410B (en) | 2015-04-15 | 2015-04-15 | Smoke filtration element and preparation method |
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| CN104826410B true CN104826410B (en) | 2016-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107261692A (en) * | 2017-08-11 | 2017-10-20 | 上海闰铭精密技术有限公司 | Ultrapure nanoelectronic level gas-filtering device |
| CN109454231B (en) * | 2018-12-18 | 2021-02-05 | 湖北汽车工业学院 | Preparation method of iron-aluminum-copper alloy microporous filter material |
| CN109645572B (en) * | 2019-01-14 | 2024-05-14 | 广东精彩国际生物科技有限公司 | Filtering component and electronic smoking set using same |
| CN113584402B (en) * | 2021-08-03 | 2022-11-08 | 西部宝德科技股份有限公司 | Preparation method of iron-aluminum-chromium filtering material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2303476Y (en) * | 1997-07-17 | 1999-01-13 | 青岛高科技工业园统力商贸有限公司 | Toxicant-filtering tip of cigarette |
| US7189375B2 (en) * | 2002-09-16 | 2007-03-13 | Delphi Technologies, Inc. | Exhaust treatment device |
| CN2689720Y (en) * | 2003-09-03 | 2005-04-06 | 牡丹江卷烟材料厂有限责任公司 | Acetate fibre plus nano noble metal catalyst binary composite filter stick |
| US20070050978A1 (en) * | 2005-09-06 | 2007-03-08 | Topsoe Haldor F | Method for manufacturing of a metallic sleeve |
| CN201162559Y (en) * | 2008-01-18 | 2008-12-10 | 梁彦申 | Vent gas carbon smoke particulate filtering purifier of metal diesel engine |
| CN102008857B (en) * | 2010-09-21 | 2013-07-17 | 昆山海普过滤分离科技有限公司 | Filter element for filtering high-temperature dust and purifying gas as well as preparation method and application thereof |
| CN103240087B (en) * | 2013-05-30 | 2015-10-07 | 中国矿业大学(北京) | Take sintering metal powder as the volatile organic matter purifier of carrier |
| CN204601847U (en) * | 2015-04-15 | 2015-09-02 | 成都易态科技有限公司 | Smoke filtration element |
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Denomination of invention: Smoke filter elements and production methods Effective date of registration: 20231218 Granted publication date: 20160824 Pledgee: Chengdu Rural Commercial Bank Co.,Ltd. Wenjiang Liulin Branch Pledgor: INTERMET TECHNOLOGIES CHENGDU Co.,Ltd. Registration number: Y2023980072440 |