CN105194942B - The helical form efficient low-resistance filter element that a kind of ferroaluminium is made - Google Patents
The helical form efficient low-resistance filter element that a kind of ferroaluminium is made Download PDFInfo
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- CN105194942B CN105194942B CN201510665213.0A CN201510665213A CN105194942B CN 105194942 B CN105194942 B CN 105194942B CN 201510665213 A CN201510665213 A CN 201510665213A CN 105194942 B CN105194942 B CN 105194942B
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- filter element
- ferroaluminium
- element body
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- helical form
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- 239000000706 filtrate Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003546 flue gas Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 7
- 239000000779 smoke Substances 0.000 abstract description 4
- 238000005987 sulfurization reaction Methods 0.000 abstract description 3
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 18
- 239000000843 powder Substances 0.000 description 14
- 238000001914 filtration Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- 229910000765 intermetallic Inorganic materials 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 239000004071 soot Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
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- 238000005275 alloying Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- Filtering Materials (AREA)
Abstract
The invention discloses the helical form efficient low-resistance filter element that a kind of ferroaluminium is made, belong to the filter element design field of cleaner unit.This filter element is made up of ferroaluminium filtrate, and bends curl, and filter element body is supported by metal grid.Filter element is mainly made up of devices such as filter element body, exhaust duct, pulse backblowing linkage, top cover and valves, and filter element body is cylindric sped structure, and spiral filter element body aperture is in that arithmetic progression reduces from inside to outside.In actual motion, after flue gas successively filters through filter element, most of dust is delayed at outside filter element, and purified gas enters nexine filter element and successively filters, and finally enters next procedure by smoke exhaust pipe again.The present invention solves the key problem that cleaner unit efficiency of dust collection in the market is low, high temperature resistance, sulfuration resistant performance are weak.
Description
Technical field
The invention belongs to the filter element design field of cleaner unit is and in particular to the system of the intermetallic compound porous filtrate of Fe-Al
The change of standby, filtrate maximum diameter of hole and the relation of filter element helicoidal structure and efficiency of dust collection, complete dedusting under different application requirements
The optimized design scheme of device filter element.
Background technology
A large amount of dust and poisonous, harmful gass are inevitably resulted from modern industry production process.In recent years haze,
The problems such as acid rain, grows in intensity, and seriously threatens human health, therefore mitigates the pollution of regional atmospheric fine particle, reduces urban air
Sulfur dioxide concentration becomes the task of top priority of environmental conservation.
In recent years, filtering technique has become the dominant technology of gas cleaning.Compared with conventional cooling, purifying technology, high temperature
Flue gas (more than 220 DEG C of industrial smokes) purification techniques has that equipment investment is few, high working efficiency, energy consumption are low, the environmental protection compatibility
Wait well outstanding advantages.The inorganic porous material that generally this cleaner unit is used includes metal material and ceramic material two big class, its
Middle ceramic foam filter is due to having the excellent performance such as high temperature resistant, corrosion-resistant, thus is widely used in coal-burning boiler, coal
In the high-temperature flue gas purification equipment of gasification power generation system, oil cat-cracker and metal smelt etc..But porous ceramicss are solid
The high fragility having, low heat resistanceheat resistant shake ability so as to lead to because of thermal stress in use damage, and bring huge hidden to production
Suffer from.Stainless steel porous material is because mechanical behavior under high temperature is bad and the low defect of resistance to high temperature oxidation, curing capacity, nor competent height
The purification work of warm flue gas.
Intermetallic compound has many special physics, chemistry and mechanical property.Wherein, Fe-Al intermetallic compound
Porous material is the another novel inorganic porous material after pottery and metal polyporous material, and Fe-Al intermetallic compound has
There are high temperature specific strength and the performance of excellent high-temperature oxidation resistant, sulfuration resistant, resist melt salt and impervious carbon, the corrosion-resistant temperature of highest can
Reach 1200 DEG C.Additionally, Fe-Al also has excellent anti-catalytic coking, wear-resistant and preferable processability, meet the modern times
For the requirement of high temperature filter material in industry, there is the advantages such as can prepare complex-shaped workpieces and pore structure is controlled.Compensate for making pottery
The intrinsic fragility of porcelain porous material and be difficult assembly and connection and metal polyporous material high-temperature oxidation resistant and corrosion resistance is poor, makes
The deficiency such as standby cost intensive and preparation technology pollution environment, is a kind of functional material with broad prospect of application, can extensively answer
For filtration separation purification, purification, sound insulation, heat-insulated and catalysis etc. field.Therefore, development and application filtering high-temperature flue gas is new
High performance Fe-Al alloy porous filtering material is of great significance for having in cleaner.
Through years of researches, people have for the structure of Fe-Al alloy and property and are further understood from, in order that its
Acquisition is widely applied, and is necessary for, on the basis of based on its corrosion resistance excellent, density and low cost and other advantages, improving its room temperature
The little deficiency of ductility low and high temperature creep resistance.For this reason, people summarize several principles as follows in alloy design in recent years：1)
Aluminium content is controlled to be less than 38%；2) form the forge or elongated grain structure containing fibrous tissue；3) refining grain size；
4) from more than 400 DEG C of temperature slow cooling to reduce thermal vacancy；5) add beneficial alloying element (B, Mn element etc.).
For porous material, pore structure is to affect one of principal element of its performance, directly determines the saturating of material
Cross performance and application.Porosity, maximum diameter of hole and air permeability are used to characterize three weights of porous material hole structure performance
Want parameter, in filtering material field., air permeability and maximum diameter of hole two hole structural property parameter directly reflect porous body respectively
Filtration flux and filtering accuracy.At present, studied and described powder size and reaction conjunction in detail with reference to numerical value analysis means
Become the law of regularity between Fe-Al intermetallic compound porous material hole structural property parameter or quantitative relationship, this is filtrate
The performance structure of pore structure controls provides scientific basis.Research shows, when powder diameter is more than 60 μm, with powder diameter
Increase, less, that is, powder size is not determined for the total porosity of Fe-Al intermetallic compound porous material and the change of perforate porosity
Determine the principal element of Fe-Al porous material porosity, and powder size is to determine that Fe-Al intermetallic compound porous material is maximum
The principal element in aperture, in 18～125 μm of particle size range, porous body maximum diameter of hole dmWith powder diameter dpBetween strictly abide by
Follow dm=0.4 dpStraight line Changing Pattern.This is also that filtrate complexity aperture structure design provides effective foundation.
Fe-Al filter-element dust collector structure is made up of devices such as filter element body, metal grid and pulse backblowings.Filter element adopts
Fe-Al porous filter core, filter element aperture is then mated according to the granularity of dust in flue gas.Prepared by adjusting Fe-Al filter element
Parameter (as powder mixture ratio, powder size, pressing pressure, surface modification etc.) in journey can prepare that aperture can within the specific limits
The Fe-Al porous filter core of control.During cleaner unit work, dusty gas is entered by casing sidepiece, and exhaust gas dust passes through inertial collision, sieve
The comprehensive functions such as filter are deposited on surface of filter medium, and what granularity was big is collected at outer layer wall, little being sequentially entered by large aperture of granularity
Nexine wall, through comprehensive function layer by layer, the flue gas that granularity reaches discharge standard enters center smoke discharging pipe discharge.When chimney filter resistance
Power reaches removes filter element body surface dust using high-voltage pulse blow-back mode during setting.Under purified gas enters
Procedure.
Content of the invention
For solving the key problem that cleaner unit efficiency of dust collection is low in the market, high temperature resistance, sulfuration resistant performance are weak, the present invention
Provide the helical form high-efficient low-resistance filter element that a kind of ferroaluminium is made, to solving problem above.
In order to solve problem above, the present invention is achieved by the following technical programs.
The invention provides the helical form low-resistance filter element that a kind of ferroaluminium is made, including：Filter element body, exhaust duct, arteries and veins
Rush blowback linkage and top cover valving, filter element body is supported by metal grid it is characterised in that described filter element body is
Cylindric sped structure, this spiral filter element body aperture is in that arithmetic progression is distributed along axis；Described arithmetic progression distribution
Refer to that aperture is followed successively by d from inside to outsidem1、dm2、dm3、…、dmn, and they are with dmnFor first term, D is the grade difference of tolerance
Row, i.e. dm1=dmn+ (n-1) D, wherein：0.5μm≤dm≤ 50 μm, n is the number of turns, n is >=1 natural number, and dm1It is innermost layer filter
The maximum diameter of hole of material, aperture ecto-entad increases successively, and innermost layer aperture is maximum.
Further, according to the difference of operating mode, different filter element number of turns n are set, the number of turns controls within the circle of 2≤n≤5.
In the present invention：In view of soot, there is agglomeration, big granularity soot is nearly all blocked in outer surface, only grain
The soot of footpath very little enters nexine, and after successively filtering, small grain size soot enters nexine, for preventing soot from occurring agglomeration to block up
Plug filter element, so design aperture ecto-entad increases successively, innermost layer aperture is maximum.
In the present invention：Filter element is to bend curl by the ferroaluminium of computational length L, by adjusting Fe, Al powder ratio
Example, sintering temperature and the pore size controlling Fe-Al alloy porous material sintered blank using multi-steps sintering technique, make aperture
D distribution gradient in the range of 0.5～50 μm.
In the present invention：Prepare Fe, Al powder selected by filtrate all using same particle sizes rank, in certain preparation condition
Under, the maximum diameter of hole p of filtrate porousmWith powder diameter ppBetween there is following relational expression：pm=kp·pp, k in formulapFor ratio system
Number, the reaction conversion ratio to porous body maximum diameter of hole for the powder diameter under this condition.
In the present invention：It is required filter area S to be drawn according to process air quantity Q and filtration velocity V, by the filtration of single filter cylinder
Area and the size of filtrate needed for the calculating of equipment situation.Longitudinally height is h to setting filter cylinder filtrate, can show that filtrate unfolding calculation is long
Degree L, L=S/h, d2=2nd1, 2d in formula1For the diameter of filter shaft, d2For the diameter of outermost layer filtrate, d1For adjacent Internal and external cycle
Distance, n is the number of turns, can be drawn specific design size and the structure of filter element filtrate by above-mentioned formula.
Compared with prior art, the present invention has following technique effect：
1st, by helical form filter element of the present invention increased successively using the aperture ecto-entad of filtrate, outer layer filtrate can be by
Larger soot stops, prevents it from entering internal layer, improves its filter effect.Therefore, dust removing effects of the present invention are substantially better than current city
The multistage purification dust pelletizing system that field uses, and efficiency of dust collection is high, working stability；
2nd, the present invention can simplify processing procedure using Fe-Al candle filter cleaning high-temp flue gas, reduce equipment investment,
Operating cost and floor space；
3 this invention removes the hidden danger of burning that cloth envelop collector is caused due to furnace temperature fluctuation reduces wet filter link
Link with water and related wastewater treatment；The condensation avoiding the low condensation point material occurring in reducing temperature course is (as tied
Dew), and the pollution that thus causes or equipment corrosion；Decrease maintenance cost and extend service life of equipment.
Brief description
Fig. 1 is helical form filter element elevation of the present invention.
Fig. 2 is the A-A cross-section cutaway view in Fig. 1.
Fig. 3 is the B-B cross-section cutaway view in Fig. 1.
In figure：1st, upper top cover；2nd, nozzle；3rd, flange；4th, pulse valve；5th, control valve；6th, smoke exhaust pipe；7th, nitrogen bag；8th, filter
Core body；9th, lower top cover；10th, top cover headstock gear；d1：Box body wall spacing；2d1：Innermost layer diameter；d2：Box body diameter.
Specific embodiment
Below in conjunction with the detailed description present invention, but the present invention is not limited to following embodiments.
From Fig. 1～Fig. 3, the present invention includes filter element body 8, exhaust duct 6, (the inclusion spray of pulse backblowing linkage
Mouth 2, flange 3, pulse valve 4, control valve 5, nitrogen bag 7), upper top cover 1, lower top cover 9 and top cover headstock gear 10.Described air draft
Pipe, top cover material are made up of high temperature resistant, decay resistance material.
When being embodied as, aperture is followed successively by d from inside to outside in arithmetic progression distributed aperturem1、dm2、dm3、…、dmn, and it
Be with dmnFor first term, D is the arithmetic progression of tolerance, i.e. dm1=dmn+ (n-1) D, wherein：0.5μm≤dm≤ 50 μm, n is circle
Number, n is >=1 natural number, dm1It is the maximum diameter of hole of innermost layer filtrate, dmnEcto-entad increases successively, and innermost layer aperture is
Greatly.
Filter element body 8 of the present invention is made up of intermetallic compound ferroaluminium, by adjusting Fe, Al powder proportions, sintering
Temperature and the pore size controlling Fe-Al alloy porous material sintered blank using multi-steps sintering technique, make aperture d 0.5
Distribution gradient in the range of～50 μm.In actual moving process flue gas from cylindrical screw filter element surrounding enter casing after, because
Minimum for outermost layer aperture, big granularity flue gas is blocked in outer layer, and the little flue gas of granularity enters nexine and filters successively, for preventing powder
Dirt is united phenomenon, wall spacing d1, tolerance D is unsuitable excessive in the arithmetic progression Gradient distribution of aperture.
In actual motion, after flue gas successively filters through filter element, most of dust is delayed at outside filter element the present invention, only
Gas after change enters nexine filter element and successively filters, and finally enters air by smoke exhaust pipe again.Constantly entering with filter process
OK, outside filter element, appended long-pending dust is continuously increased thus leading to the resistance of dust-precipitator itself to be gradually increased.When top cover opens and closes dress
10 times opened of putting reach when presetting time value, and dust-removing control device sends signal, carries out pulse of nitrogen to filter element body
Blowback 7.The filtration source of the gas cutting off this room opens electromagnetic pulse 4 and control valve 5, and compressed air expands at a high speed in filter element, works as pressure
Power reaches preset value, along with the effect of inverse air-flow, so that appended grit deformation outside filter element is come off.Fully examining filter dust
It is eliminated required time completely, then opens the filtration source of the gas of this room and close electromagnetic pulse control valve, in this system filter element is again
Return to filtration condition.
Claims (2)
1. the helical form efficient low-resistance filter element that a kind of ferroaluminium is made, including：Filter element body, exhaust duct, pulse backblowing linkage
Device and top cover valving, filter element body is supported by metal grid it is characterised in that described filter element body is cylindric spiral
Formula structure, this spiral filter element body aperture is in that arithmetic progression is distributed along axis；
Described arithmetic progression distribution refers to that aperture is followed successively by d from inside to outsidem1、dm2、dm3、…、dmn, and they are with dmnHeaded by
, D is the arithmetic progression of tolerance, i.e. dm1=dmn+ (n-1) D, wherein：0.5μm≤dm≤ 50 μm, n is the number of turns, n is >=1 from
So count, dm1It is the maximum diameter of hole of innermost layer filtrate, dmnEcto-entad increases successively, and innermost layer aperture is maximum.
2. ferroaluminium as claimed in claim 1 is made helical form efficient low-resistance filter element is it is characterised in that according to operating mode
Difference, arranges different filter element number of turns n, and the number of turns controls within the circle of 2≤n≤5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510665213.0A CN105194942B (en) | 2015-10-14 | 2015-10-14 | The helical form efficient low-resistance filter element that a kind of ferroaluminium is made |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510665213.0A CN105194942B (en) | 2015-10-14 | 2015-10-14 | The helical form efficient low-resistance filter element that a kind of ferroaluminium is made |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105194942A CN105194942A (en) | 2015-12-30 |
| CN105194942B true CN105194942B (en) | 2017-03-01 |
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ID=54943102
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510665213.0A Expired - Fee Related CN105194942B (en) | 2015-10-14 | 2015-10-14 | The helical form efficient low-resistance filter element that a kind of ferroaluminium is made |
Country Status (1)
| Country | Link |
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| CN (1) | CN105194942B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5660606A (en) * | 1996-01-11 | 1997-08-26 | Automotive Systems Laboratory, Inc. | Inflator filter for producing helical gas flow |
| SE536286C2 (en) * | 2011-10-06 | 2013-07-30 | Husqvarna Ab | Dust separator with constant suction power |
| CN203123704U (en) * | 2013-02-05 | 2013-08-14 | 佛山市顺德区阿波罗环保器材有限公司 | Dust-collecting filter |
| CN205055650U (en) * | 2015-10-14 | 2016-03-02 | 安徽工业大学 | High -efficient low resistance filter core of heliciform that ferro -aluminium alloy was made |
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2015
- 2015-10-14 CN CN201510665213.0A patent/CN105194942B/en not_active Expired - Fee Related
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