CN110220830A - A kind of aviation is cleaned with aluminium base stainless steel foldable filter element and detection method - Google Patents
A kind of aviation is cleaned with aluminium base stainless steel foldable filter element and detection method Download PDFInfo
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- CN110220830A CN110220830A CN201910398629.9A CN201910398629A CN110220830A CN 110220830 A CN110220830 A CN 110220830A CN 201910398629 A CN201910398629 A CN 201910398629A CN 110220830 A CN110220830 A CN 110220830A
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- filter core
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- stainless steel
- cleaned
- aluminium base
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- 239000004411 aluminium Substances 0.000 title claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 28
- 239000010935 stainless steel Substances 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000004140 cleaning Methods 0.000 claims abstract description 57
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000003350 kerosene Substances 0.000 claims abstract description 12
- 230000002000 scavenging effect Effects 0.000 claims abstract description 9
- 238000011010 flushing procedure Methods 0.000 claims abstract description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 25
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 20
- 239000012459 cleaning agent Substances 0.000 claims description 19
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 15
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000004094 surface-active agent Substances 0.000 claims description 11
- 229910019430 NaSnO3 Inorganic materials 0.000 claims description 10
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 10
- -1 polyoxyethylene Polymers 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 9
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 8
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000006210 lotion Substances 0.000 claims description 6
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 4
- 238000000855 fermentation Methods 0.000 claims description 4
- 230000004151 fermentation Effects 0.000 claims description 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- 230000031709 bromination Effects 0.000 claims description 2
- 238000005893 bromination reaction Methods 0.000 claims description 2
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 10
- 238000007654 immersion Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000002585 base Substances 0.000 description 20
- 239000000243 solution Substances 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000004519 grease Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 8
- 238000001914 filtration Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 150000002191 fatty alcohols Chemical class 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000007743 anodising Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of cleaning of aluminium base stainless steel foldable filter element and detection methods, and this method comprises the following steps: (1) kerosene immersion, (2) flushing, the test of (3) bubble test, (4) ultrasonic gross rinse, (5) ultrasonic wave fine purifiation, (6) secondary bubble test, (7) flow velocity.The present invention selects kerosene to impregnate filter core can be while dispelling cartridge surface extra greasy dirt, reduce the corrosion to filter core, reduce single scavenging period, increase wash number, corrosion of the alkaline cleaning fluid to filter core can be reduced, it is equipped with bubble test before and after filter element cleaning, damaged filter core is strictly screened.Aluminium base stainless steel foldable filter element can be cleaned by the technique, and filter out qualified filter core.
Description
Technical field
It is cleaned the present invention relates to a kind of aviation with aluminium base stainless steel foldable filter element and detection method, more particularly in aviation
In engine maintenance, the high-precision aluminium base used in RP-3 aviation kerosine and 8B aeroengine oil with three layer filtration face is filtered
The cleaning and its detection method of stainless steel foldable filter element, belong to aeronautical maintenance field.
Background technique
Aircraft is flying after a certain period of time, and engine needs periodically repair on ground, and are tested for the property.For
Save the cost, used RP-3 aviation kerosine and 8B lubricating oil will be reused in testing.To guarantee oil quality, lead to
Often the high-precision aluminium base stainless steel foldable filter element with three layer filtration face is selected to be filtered oil liquid, the precision of filter core is respectively
10u and 5u.In aerospace applications, also usually using such filter core.This filter element filtering net uses stainless steel, upper and lower sealed end
Head uses metallic aluminium, to reduce filter core quality；Aluminium surface carries out sulfur acid anodizing processing, improves its corrosion resistance.Engine
During ground maintenance, this kind of filter element filtering impurity mainly includes new components generated metal fillings in running in stage,
The aviation Special seal rouge of components seal face excess surface and because of the grease that high oil temperature and air catalytic oxidation are formed,
And these metal fillings and grease mix, and are adhered to cartridge surface, and filter core is caused to block.Although such filter element filtering performance
It is good, but expensive, higher operating costs.And stainless steel foldable filter element has characteristic capable of washing, it is clear by being carried out to the filter core
It washes, and reuses, to reduce cost.
The end up and down of major part stainless steel foldable filter element is stainless steel at present, therefore can be using strong base solution to it
It is cleaned, preferable cleaning effect, cleaning method can be obtained specifically: stainless steel is rolled over using NaOH strong base solution before cleaning
Folded filter core carries out boiling bath and impregnates 60 minutes, to dispel excess surface greasy dirt or grease；It is cleaned again with ultrasonic wave, cleaning agent is adopted
With strong base solution, scavenging period about 60 minutes；Then filter core is rinsed using weak acid solution, remains in filter core table to neutralize
The akaline liquid in face；Finally just backwashed with clear water and low-pressure compressed air again；Pressure decline method or stream are used after cleaning
Fast detection method detects the cleaning effect of filter core.Such as patent of invention: a kind of filter element cleaning reuse method
(CN201210000821), pollutant remaining on filter core is first heated to 550 after drying at 110 DEG C before patent cleaning
DEG C, to destroy the organic matter in pollutant；Then plus NaOH solution is impregnated 24 hours, during which periodically to be overturn filter core, then be used
Demineralized water cleans filter core, is impregnated one hour with 1% sodium hypochlorite again after cleaning, finally cleans up (especially note with demineralized water
The flushing of meaning filter core water producing pipe), after installing filter core, non-oxydizing sterilization is added in In Shade drying in cartridge filter
Agent 2000mL impregnates；Test cleaning effect is carried out using pressure test after cleaning.Or patent of invention: a kind of foldable filter element exists
Line cleaning machine and its cleaning process (CN201610236267) describe a kind of foldable filter element on-line cleaning machine and its scavenger
Skill, the cleaning process equally use NaOH solution, and cleaning temperature is 30-70 DEG C, are just being recoiled by NaOH cleaning solution and clean water
It washes to reach cleaning effect；Using the concentration of detection electrolyte after cleaning, cleaning effect is analyzed and determined by conductivity.
Although the aluminium material surface of aluminium base stainless steel foldable filter element has carried out sulfur acid anodizing processing, its anti-alkali corrosion energy
Power can not show a candle to stainless steel, must be to aluminium base filter core if cleaned for a long time using high temperature highly basic cleaning solution to aluminium base filter core
Biggish damage is caused, to reduce the service life of such filter core.
In addition, pressure decline method works as disengaging by the pressure difference that detection filter core passes in and out both ends liquid to judge filter element cleaning situation
When mouth pressure difference is lower than certain value, then it is clean to be considered as filter element cleaning；And flow rate detection method enters the time of filter core using liquid, equally
For detecting whether filter core cleans up.It is analyzed based on test philosophy, pressure decline method and flow rate detection method can not be to damaged filter cores
Effectively detected.If damaged or cracked, filter core can smoothly lead in voltage drop detection and flow rate detection
It crosses.Once and this kind of damaged filter core equipment, will affect oil quality, and then influence the accuracy of Engine Block Test result.And it breaks
The detection of filter core is damaged usually only by simple range estimation, accuracy is too poor, usually only it can be found that larger crackle, fine cracks are very
Hardly possible discovery, and these fine cracks are in high-precision filter element, are fatal.And the filtering accuracy of filter core is higher, in carrying and installation
Or in use process, damage rate is also higher.In addition, will cause when aluminium base stainless steel foldable filter element cleans in alkaline solution
Certain damage.In test, it is stainless to high-precision aluminium base to use the above-mentioned method using strong base solution as main wash agent
Steel foldable filter element is cleaned, as a result, it has been found that: when carrying out third time cleaning to filter core, the qualification rate of the batch filter core is insufficient
45%, the yellow green anodization protective layer of most of filter core upper and lower end face gradually subsides.
Summary of the invention
The present invention provides the cleaning and detection method of a kind of aluminium base stainless steel folded net filter core, for RP-3 aviation kerosine and
The cleaning of 8B aeroengine oil aluminium base stainless steel folded net filter core, cleaning effect is good, small to filter core corrosion, while can accurately screen
Filter core that is damaged out or can not cleaning.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of aviation is cleaned with aluminium base stainless steel foldable filter element and detection method, it is characterised in that includes the following steps:
Step a impregnates: filter core to be cleaned being impregnated using RP-3 aviation kerosine, soaking time 2h, in soaking process
In, it took out every 40 minutes once, with the positive blowback of low-pressure compressed air；Soaking temperature is 60-70 DEG C；
Step b is rinsed: filter core being taken out from fermentation vat, is just being backwashed with low pressure water to filter core, then with compressed air pair
Filter core carries out positive blowback；
Step c, bubble test: screening damaged filter core using bubble test for the first time, if not over filter core is washed in a pan
It eliminates；
Step d, ultrasonic gross rinse: slightly washing filter core using ultrasonic wave, dispel excess surface tamper, slightly wash down lotion by
Surfactant+Na2CO3+Na3PO4+ passivator composition, pH value 11-12, scavenging period are 20 minutes；
Step e, ultrasonic wave fine purifiation: carrying out fine purifiation to filter core using ultrasonic wave, dispel excess surface tamper, fine purifiation cleaning agent by
Surfactant+Na2CO3+Na3PO4+ passivator composition, pH value 10-11, scavenging period are 20 minutes；
Step f is rinsed: filter core being taken out from fermentation vat, is just being backwashed with high pressure water to filter core, until the pH of flushing liquor
Value is lower than 7.5, then carries out positive blowback to filter core with compressed air；
Step g, bubble test: screening damaged filter core using bubble test again, if not over, filter core is eliminated,
If illustrating that filter core without damage, then enters next link using passing through；
Step h, flow velocity test: detecting the cleaning effect of filter core using flow velocity test, if filter core carries out by test
Cleaning, drying；If do not passed through, step d-h is repeated；If after being repeated 3 times, filter core is not tested by flow velocity yet, then filter core is washed in a pan
It eliminates.
Further, to guarantee safety, oil liquid is heated by the way of water-bath in step a.
Further, in step b and step f, hydraulic pressure 0.3MPa, air pressure 0.3MPa.
Further, in step c and step g, the bubble test of 5 μ and 10 μ detection pressure value are 0.0012 in bubble test
± 0.0001MPa and 0.0017 ± 0.0001MPa.
Further, in step d and step e, ultrasonic frequency 25KHz, cleaning temperature is 40-50 DEG C.
Further, described slightly to wash down in lotion, surfactant includes 664 cleaning agents and polyoxyethylene aliphatic alcohol ether,
Passivator includes NaSnO3And cetyl trimethylammonium bromide, the concentration of 664 cleaning agent are 8-10g/L, polyoxyethylene
The concentration of fatty alcohol ether is 10-12g/L, Na2CO3 12-15g/L, Na3PO48-10g/L, NaSnO3For 4mg/L, cetyl
Trimethylammonium bromide is 10mg/L.
Further, in the fine purifiation cleaning agent, surfactant includes 664 cleaning agents and polyoxyethylene aliphatic alcohol ether,
Passivator includes NaSnO3And cetyl trimethylammonium bromide, 664 cleaning agent are 8-10g/L, polyoxyethylene fatty alcohol
Ether 10-12g/L, Na2CO3For 10-12g/L, Na3PO4For 6-9g/L, NaSnO3For 3mg/L, cetyl trimethylammonium bromide
For 8mg/L.
Compared with prior art, the beneficial effects of the present invention are:
The invention discloses a kind of cleanings of aluminium base stainless steel foldable filter element and detection method, this method, and highly basic soak is changed to coal
Oil immersion bubble, selecting kerosene to impregnate filter core can be while dispelling cartridge surface extra greasy dirt, corrosion of the reduction to filter core；
Since filter core stopping state is different, cleaning demand is also different, therefore this cleaning method shortens scavenging period, increases cleaning
The frequency reduces the time of contact of filter core and alkaline cleaning fluid, is further reduced alkaline cleaner to filter to adapt to different filter cores
The corrosion of core extends the service life of filter core；It is equipped with bubble test before and after filter element cleaning, primary election is carried out to filter core, to subtract
Few useless workload；After cleaning, bubble test is carried out, to filter out the filter core damaged by cleaning, with further
The quality for guaranteeing filter core, strictly screens damaged filter core.Aluminium base stainless steel foldable filter element can be carried out by the technique clear
It washes, and filters out qualified filter core.The smaller Na of corrosivity is used compared to other cleaning agents2CO3 And Na3PO4As basic solvent,
And the passivator added is the dedicated passivator of aluminium；The present invention is in such a way that ultrasonic gross rinse and fine purifiation combine, ultrasonic gross rinse
Most grease is washed away, the pH value of cleaning agent used in ultrasonic wave fine purifiation slightly below slightly washes down lotion, can be further
Reduce corrosion of the cleaning agent to filter core.
Detailed description of the invention
Fig. 1 is the process flow chart of high-precision aluminium base stainless steel folded net filter element cleaning of the present invention.
Specific embodiment
The present invention will be further described with reference to the examples below, and described embodiment is only present invention a part
Embodiment is not whole embodiment.Based on the embodiments of the present invention, those skilled in the art are not making
Other all embodiments obtained, belong to protection scope of the present invention under the premise of creative work.
As shown in Fig. 1, specific embodiments of the present invention are mainly comprised the steps that
Filter core to be cleaned is impregnated with RP-3 aviation kerosine, soaking time 2h took in soaking process every 40 minutes
Primary out, with the positive blowback of low-pressure compressed air, soaking temperature is 60-70 DEG C.In the long-term use process of filter core, the impurity such as grease
It has been firmly adhered to cartridge surface, filter core is caused to block, and grease is soluble in organic solution, therefore uses RP-3 aviation kerosine pair
Filter core is impregnated；Grease due to being attached on cartridge surface gradually starts dissolution or no longer so tight under the immersion of kerosene
It is adhered to cartridge surface, after impregnating half an hour, positive blowback is carried out to filter core using low-pressure compressed air, to reach to adherency
It is tentatively dispelled in cartridge surface, or reduces the adhesion strength of grease and cartridge surface, prepared for next step ultrasonic cleaning.
Filter core is just being backwashed using the clean water of 0.3MPa pressure after immersion, then with compressed air to filter core
Positive blowback is carried out, air pressure is about 0.3MPa, to dispel the biggish impurity of extra and volume for being attached on cartridge surface.
Filter core after drying is subjected to bubble test, preliminary screening is carried out to filter core to be cleaned.If bubble test passes through,
Then enter next link；If bubble test does not lead to, illustrate that filter core has damaged, then filter core is directly scrapped, to reduce clear
Idle work during washing；Wherein the bubble test of 5 μ and 10 μ detection pressure value are 0.0012(± 0.0001) MPa and 0.0017
(± 0.0001) MPa.
The filter core that bubble test is passed through carries out ultrasonic gross rinse, and wherein ultrasonic frequency is 25KHz, slightly wash down lotion by
Surfactant+Na2CO3 +Na3PO4+ passivator composition, pH value 11-12, pH value is according to Na2CO3+Na3PO4Additive amount
It controls, wherein Na2CO3 For 12-15g/L, Na3PO4For 8-10g/L；Passivator is NaSnO3With cetyl trimethyl bromination
Ammonium, content are respectively 4mg/L and 10mg/L；Surfactant is 664 cleaning agents (8-10g/L) and polyoxyethylene fatty alcohol
Ether 10-12g/L, scavenging period are 20 minutes, and cleaning temperature is 40-50 DEG C.Since cartridge surface greasy dirt is more, use
Strong base solution is cleaned, to promote its cleaning effect；In cleaning solution added passivator and the short time cleaning purpose be for
Reduce corrosion of the cleaning solution to filter core.Excess oil is not impregnated by kerosene to dispel cartridge surface.
Then carry out ultrasonic wave fine purifiation again, wherein ultrasonic frequency be 25KHz, fine purifiation cleaning agent by surfactant+
Na2CO3+Na3PO4+ passivator composition, pH value 10-11, pH value is according to Na2CO3+Na3PO4Additive amount control, wherein
Na2CO3For 10-12g/L, Na3PO4For 6-9g/L, NaSnO3For 3mg/L, cetyl trimethylammonium bromide 8mg/L；Surface
Activating agent is that 664 cleaning agents are 8-10g/L, polyoxyethylene aliphatic alcohol ether 10-12g/L；Cleaning temperature is 40-50 DEG C, when cleaning
Between be 20 minutes；Due to having been subjected to ultrasonic gross rinse, the grease impurities of cartridge surface have largely been cleaned, but its table
Still there is a part residual in face, therefore in the ultrasonic wave fine purifiation stage, decreased using the pH value of cleaning solution, to reduce to filter core
Corrosion, while in order to guarantee its cleaning effect, but thus scavenging period extended.
Filter core is just being backwashed using high pressure water after cleaning, hydraulic pressure is about 0.3MPa；At about 3 points of washing time
Zhong Hou collects flushing liquor, and tests its pH value, if pH value is lower than 7.5, after being in neutrality, then stops rinsing, otherwise continues to rinse；
After pH value reaches requirement, then with compressed air positive blowback is carried out to filter core, air pressure is about 0.3MPa.
Then second of bubble test is carried out to filter core, bubble test passes through, then enters next link, and bubble test does not have
Logical, then filter core is directly scrapped；Wherein the bubble test of 5 μ and 10 μ detection pressure value be 0.0012(± 0.0001) MPa and
0.0017(± 0.0001) MPa.
Flow velocity test will be carried out by the filter core of bubble test, if flow velocity test pass through, cleaning, drying is packaged if filter core
With spare.If flow velocity not over it is positive and negative to carry out ultrasonic gross rinse, ultrasonic wave fine purifiation, water and compressed air to filter core again
It blows, bubble test and flow velocity test；If repeated washing is three times, filter core is not tested by flow velocity yet, then filter core is scrapped.
Disclosed above is only presently preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore makees ground equivalent variations according to the claims in the present invention, be still within the scope of the present invention.
Claims (7)
1. a kind of aviation is cleaned with aluminium base stainless steel foldable filter element and detection method, which comprises the steps of:
Step a impregnates: filter core to be cleaned being impregnated using RP-3 aviation kerosine, soaking time 2h, in soaking process
In, it took out every 40 minutes once, with the positive blowback of low-pressure compressed air；Soaking temperature is 60-70 DEG C；
Step b is rinsed: filter core being taken out from fermentation vat, is just being backwashed with low pressure water to filter core, then with compressed air pair
Filter core carries out positive blowback；
Step c, bubble test: screening damaged filter core using bubble test for the first time, if not over filter core is washed in a pan
It eliminates；
Step d, ultrasonic gross rinse: slightly washing filter core using ultrasonic wave, dispel excess surface tamper, slightly wash down lotion by
Surfactant+Na2CO3+Na3PO4+ passivator composition, pH value 11-12, scavenging period are 20 minutes；
Step e, ultrasonic wave fine purifiation: carrying out fine purifiation to filter core using ultrasonic wave, dispel excess surface tamper, fine purifiation cleaning agent by
Surfactant+Na2CO3+Na3PO4+ passivator composition, pH value 10-11, scavenging period are 20 minutes；
Step f is rinsed: filter core being taken out from fermentation vat, is just being backwashed with high pressure water to filter core, until the pH of flushing liquor
Value is lower than 7.5, then carries out positive blowback to filter core with compressed air；
Step g, bubble test: screening damaged filter core using bubble test again, if not over, filter core is eliminated,
If illustrating that filter core without damage, then enters next link using passing through；
Step h, flow velocity test: detecting the cleaning effect of filter core using flow velocity test, if filter core carries out by test
Cleaning, drying；If do not passed through, step d-h is repeated；If after being repeated 3 times, filter core is not tested by flow velocity yet, then filter core is washed in a pan
It eliminates.
2. a kind of aviation according to claim 1 is cleaned with aluminium base stainless steel foldable filter element and detection method, feature exist
In being heated by the way of water-bath to oil liquid in step a.
3. a kind of aviation according to claim 1 is cleaned with aluminium base stainless steel foldable filter element and detection method, feature exist
In in step b and f, hydraulic pressure is about 0.3MPa, and air pressure is about 0.3MPa.
4. a kind of aviation according to claim 1 is cleaned with aluminium base stainless steel foldable filter element and detection method, feature exist
In, in step c and step g, in bubble test the bubble test of 5 μ and 10 μ detection pressure value be 0.0012 ± 0.0001MPa and
0.0017±0.0001MPa。
5. a kind of aviation according to claim 1 is cleaned with aluminium base stainless steel foldable filter element and detection method, feature exist
In in step d and step e, ultrasonic frequency 25KHz, cleaning temperature is 40-50 DEG C.
6. a kind of aviation according to claim 1 is cleaned with aluminium base stainless steel foldable filter element and detection method, feature exist
In described slightly to wash down in lotion, surfactant includes 664 cleaning agents and polyoxyethylene aliphatic alcohol ether, and passivator includes
NaSnO3And cetyl trimethylammonium bromide, the concentration of 664 cleaning agent are 8-10g/L, polyoxyethylene aliphatic alcohol ether
Concentration is 10-12g/L, Na2CO3 12-15g/L, Na3PO48-10g/L, NaSnO3For 4mg/L, cetyl trimethyl bromination
Ammonium is 10mg/L.
7. a kind of aviation according to claim 1 is cleaned with aluminium base stainless steel foldable filter element and detection method, feature exist
In in the fine purifiation cleaning agent, surfactant includes 664 cleaning agents and polyoxyethylene aliphatic alcohol ether, and passivator includes
NaSnO3And cetyl trimethylammonium bromide, 664 cleaning agent are 8-10g/L, polyoxyethylene aliphatic alcohol ether 10-12g/
L, Na2CO3For 10-12g/L, Na3PO4For 6-9g/L, NaSnO3For 3mg/L, cetyl trimethylammonium bromide 8mg/L.
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