CN109499204A - A kind of preparation method of one step shaping seamless filter bag - Google Patents
A kind of preparation method of one step shaping seamless filter bag Download PDFInfo
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- CN109499204A CN109499204A CN201811289415.XA CN201811289415A CN109499204A CN 109499204 A CN109499204 A CN 109499204A CN 201811289415 A CN201811289415 A CN 201811289415A CN 109499204 A CN109499204 A CN 109499204A
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- filter bag
- preparation
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- added
- step shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
Abstract
The invention discloses a kind of preparation methods of one step shaping seamless filter bag, this method comprises: (1) Gel Precursor, dehydrated alcohol and distilled water are mixed according to the ratio that mass ratio is 50-80:10-50:20-40, acidic catalyst is added and adjusts pH=1-3, is evenly stirred until clear solution；PH=6-7 is adjusted with basic catalyst, continues stirring 10 minutes, high-temperature fibre is added, is stirred, sealing, aging is stood, and supernatant liquor is poured out, and organic solvent is added, solvent replaces to obtain gel at 60 DEG C；(2) gel is put into mold, squeezes the water content for reaching 5-30%, stood 12h, insert gel again, until filling up mold, stand 5-24h；Product is taken out, it is dry.Filter bag of the present invention is seamless, and service life president is hardly damaged, can be normal use 1 year or more under 300 DEG C of working condition.
Description
Technical field
The invention belongs to filtering material fields, are related to a kind of preparation method of one step shaping seamless filter bag.
Background technique
With social progress and industrial expansion, such as filtering technique is wanted in mining industry, chemical industry, food, environmental protection field
Ask higher and higher, and the requirement to filter cloth is also higher and higher, this proposes higher want to filter cloth weaving process and post-processing technology
It asks.Currently, the tubulose filter bag used in the market is all first to weave base fabric with loom, the fibre web of non-woven formation is laid in base fabric
Up and down, it is reinforced with needle thorn or spun lacing, then tubular structure is sewed into docking, and not only processing time consuming is laborious, and structural
It can be bad.Meanwhile corrosion of the wiring suture of filter bag due to long-time by sour gas, it may occur that phenomena such as bursting apart is made
It fails at filter bag.
Summary of the invention
The problem of bursting apart frequent occurrence the purpose of the present invention is to solve existing common filter bag wiring suture, and propose
A kind of strength is high, high temperature resistant and the preparation method of one step shaping seamless filter bag burst apart is not susceptible under special environment.
The purpose of the present invention is what is be accomplished by the following way:
The preparation method of one step shaping seamless filter bag of the invention mainly comprises the steps that
(1) Gel Precursor, dehydrated alcohol and water are mixed according to the ratio that volume ratio is 55-80:10-50:20-40
It closes, acidic catalyst is added and adjusts pH=1-3, is evenly stirred until clear solution；PH=7.6-8.5 is adjusted with basic catalyst,
Continue stirring 8-10 minute, be added high-temperature fibre (preferably every 100 milliliters of solution fibers containing 3-5g), stirs to uniformly mixed,
Sealing aging 3-7 days, is stood, and supernatant liquor is poured out, and organic solvent is added, and progress solvent, which is replaced, at 60 DEG C -80 DEG C is coagulated
Glue；
(2) gel is put into mold, the water content of 5-30% is reached by squeezing, stand 10-12h, filling is solidifying again
Glue, until mold is filled up, it is dry after standing 5-24h.
The above-mentioned hydrolysis with acid based catalyst silane precursor, and silane catalysis (alkalization) formation gel after having hydrolyzed.
The present invention can accelerate to hydrolyze in specific pH value acid range；Make gelation rate in specific pH value alkaline range
Accelerate.
It is preferred that Gel Precursor, dehydrated alcohol and water are mixed according to the ratio that volume ratio is 55-80:50:40.
(1) Gel Precursor includes tetraethyl orthosilicate, trimethoxyvinyl silane, waterglass to the step.
The step (1) one or more of the preferred hydrochloric acid of acidic catalyst, sulfuric acid, nitric acid, phosphoric acid etc..
The step (1) one of the preferred ammonium hydroxide of basic catalyst, sodium hydroxide, sodium carbonate, sodium bicarbonate etc. or several
Kind.
The high-temperature fibre includes: polytetrafluoroethylene fibre, polyphenylene sulfide fibre, polyimide fiber, basalt fibre
One or more of high-temperature fibres such as dimension, alkali-free glass fibre.
The step (3) solvent displacement using solvent include ethyl alcohol, n-hexane, acetone, methanol, isooctane etc. commonly use it is organic
One or more of solvent, replacing right times every time is 1h-12h, preferably 3h-8h, more preferable 5h-7h, is replaced suitable time
Number is 1 time -6 times, preferably 2 times -5 times, more preferable 3 times -4 times
The suitable water content of gel is 5%-30%, preferably 10%-20%, more preferable 15%-16%.
The suitable time of repose of gel is 5h-24h, preferably 10h-15h, more preferable 12h-15h.
The drying mode includes drying, freeze-drying, supercritical drying etc. drying mode.
The suitable temperature of drying is 30 DEG C -110 DEG C, preferably 50 DEG C -90 DEG C, more preferable 60 DEG C -80 DEG C.Dry right times
For 4h-24h.Sublimation drying is preferably 20-24 hours.
Beneficial effects of the present invention compared with the prior art: most of tubulose filter bag used on existing market is all first to make
Base fabric is woven with loom, the fibre web of non-woven formation is laid in base fabric or more, is reinforced with needle thorn or spun lacing, then docking carries out
Tubular structure is sewed into, process is time-consuming and laborious, and structural behaviour is poor.Simultaneously as the wiring suture of filter bag by
It in not being the same entirety with fabric, is particularly susceptible in exhaust gas containing acid or containing the corrosion of alkaline gas, therefore, seam crossing is special
It is not easy to burst apart, damages, filter bag local damage is caused then to fail.And the seamless filtering bag for the certain material preparation that the present invention uses
There is no this problem, all material is uniformly mixed, and with mold one-pass molding, gel is extruded in a certain range of water content,
By the way of multiple filler, obtained material is seamless, can resist foreign gas corrosion, and grammes per square metre is small, strength is high, filter bag
Service life it is long, be hardly damaged, can be normal use 1 year or more under 300 DEG C of working condition.
Detailed description of the invention
Fig. 1 is mould therefor figure of the present invention.
Specific embodiment
Below by way of specific embodiment, invention is further explained:
Embodiment 1
55 milliliters of tetraethyl orthosilicates are added in 250 milliliters of beakers, it is then anhydrous with 100 milliliters of 50 milliliters of graduated cylinders weighings
Ethyl alcohol and 40 milliliters of water are uniformly mixed, and draw 100 microlitres of hydrochloric acid conditioning solution pH value to 1-3 with liquid-transfering gun, above-mentioned solution is used
Preservative film covers, and 350 revs/min are added to clear solution with liquid-transfering gun 120 microlitres of ammonium hydroxide of absorption for magnetic agitation 8 hours
In solution, solution ph is adjusted to 7.6-8.5, solution becomes viscous shape after continuing magnetic agitation about 8 minutes, and polytetrafluoroethylene (PTFE) is added
Fiber 3g, mechanical stirring seal the gel mixed with preservative film to being uniformly mixed, and shady place stands 3 days, after standing
Supernatant liquor is poured out, and is added 100 milliliters of n-hexane, is put into baking oven, 60 DEG C of progress solvent displacements, and about 6 hours every time, repeatedly
Displacement 3 times；Gel after displacement is put into mold, the gel in extrusion die reaches about 15% water content, product is put
12h is stood in the cool；Gel is inserted again, until filling up mold, without obvious crackle, gap, is placed on shady place and is stood 12h；
Product is put into baking oven, drying 12 hours, demoulds to get product under 60 DEG C of normal pressures.
Embodiment product property:
Grammes per square metre: 120g/ ㎡, thickness: 0.8 ㎝, longitudinal strength 540N, lateral strength 500N, 300 ± 20 DEG C of high temperature resistant.
Embodiment 2
80 milliliters of trimethoxyvinyl silanes are added in 250 milliliters of beakers, then weigh 50 millis with 100 milliliters of graduated cylinders
Ethyl alcohol and 40 milliliters of water are risen, are uniformly mixed, 100 microlitres of hydrochloric acid conditioning solution pH value 1-3 is drawn with liquid-transfering gun, above-mentioned solution is used
Preservative film covers, 350 revs/min magnetic agitation 10 hours；120 microlitre of 15% sodium hydroxide is drawn with liquid-transfering gun, is added to
In the solution prepared, solution ph 7.6-8.5 is adjusted, continues magnetic agitation, about solution becomes viscous shape after ten minutes, is added
Basalt fibre 3g, mechanical stirring to be uniformly mixed；The gel mixed is sealed with preservative film, shady place stands 3 days；It will be quiet
The supernatant liquor postponed is poured out, and is added about 100 milliliters of acetone, is put into baking oven, 60 DEG C of progress solvent displacements, and about 6 hours every time, such as
This is replaced 4 times repeatedly；Gel after displacement is put into mold, the gel in extrusion die, reaches about 15% water content, it will
Product is placed on shady place and stands 12h；Gel is inserted again, until filling up mold, without obvious crackle, gap, it is quiet to be placed on shady place
After setting 13h, with liquid nitrogen frozen 20min, it is then placed in freeze drier and is freeze-dried 24 hours, demould to get product.
Embodiment product property:
Grammes per square metre: 115g/ ㎡, thickness: 0.8 ㎝, longitudinal strength 550N, lateral strength 500N, 300 ± 20 DEG C of high temperature resistant.
Embodiment 3
60 milliliters of waterglass are added in 250 milliliters of beakers, then weigh 50 milliliters of ethyl alcohol and 40 millis with 100 milliliters of graduated cylinders
Water is risen, is uniformly mixed, 100 microlitres of sulfuric acid regulation solution pH value=1-3 is drawn with liquid-transfering gun, above-mentioned solution is covered with preservative film
Well, 350 revs/min magnetic agitation 10 hours；120 microlitres of ammonium hydroxide are drawn with liquid-transfering gun, are added in the solution prepared, are adjusted
Solution ph=7.6-8.5 is saved, magnetic agitation is continued, about solution becomes viscous shape after ten minutes, and polyphenylene sulfide fibre 3g, machine is added
Tool is stirred to uniformly mixed；The gel mixed is sealed with preservative film, shady place stands 7 days；By the supernatant liquor after standing
It pours out, is added about 100 milliliters of n-hexane, is put into baking oven, 60 DEG C of progress solvent displacements about 6 hours every time, replace 3 repeatedly
It is secondary；Gel after displacement is put into specified mold, the gel in extrusion die reaches 16% water content, product is placed on
Shady place stands 12h；Gel is inserted again, until mold is filled up, without obvious crackle, gap, after being placed on shady place standing 12h,
With liquid nitrogen frozen 20min, it is then placed in freeze drier and is freeze-dried 24 hours, demould to get product.
Embodiment product property:
Grammes per square metre: 115g/ ㎡, thickness: 0.8 ㎝, longitudinal strength 550N, lateral strength 500N, 300 ± 20 DEG C of high temperature resistant.
Embodiment 4
55 milliliters of tetraethyl orthosilicates are added in 250 milliliters of beakers, then weigh 50 milliliters of ethyl alcohol with 100 milliliters of graduated cylinders
It with 40 milliliters of water, is uniformly mixed, 100 microlitres of hydrochloric acid conditioning solution pH value=1-3 is drawn with liquid-transfering gun, by above-mentioned solution with fresh-keeping
Film covers, 350 revs/min magnetic agitation 10 hours；With liquid-transfering gun draw 120 microlitres of ammonium hydroxide, be added to prepared it is molten
In liquid, solution ph=7.6-8.5 is adjusted, continues magnetic agitation, about solution becomes viscous shape after ten minutes, and it is fine that alkali-free glass is added
Tie up 3g, mechanical stirring to be uniformly mixed；The gel mixed is sealed with preservative film, shady place stands 3 days；It will be upper after standing
Layer clear liquid is poured out, and is added about 100 milliliters of methanol, is put into baking oven, 60 DEG C of progress solvent displacements about 6 hours every time, are set repeatedly
It changes 3 times；Gel after displacement is put into specified mold, the gel in extrusion die reaches about 10% water content, by product
It is placed on shady place and stands 12h；Gel is inserted again, until filling up mold, without obvious crackle, gap, is placed on shady place and is stood 14h
Afterwards, it with liquid nitrogen frozen 20min, is then placed in freeze drier and is freeze-dried 20 hours, demould to get product.
Embodiment product property:
Grammes per square metre: 115g/ ㎡, thickness: 1 ㎝, longitudinal strength 550N, lateral strength 500N, 300 ± 20 DEG C of high temperature resistant.
Embodiment 5
70 milliliters of tetraethyl orthosilicates are added in 250 milliliters of beakers, then weigh 50 milliliters of ethyl alcohol with 100 milliliters of graduated cylinders
It with 40 milliliters of water, is uniformly mixed, 100 microlitres of hydrochloric acid conditioning solution pH value=1-3 is drawn with liquid-transfering gun, by above-mentioned solution with fresh-keeping
Film covers, 350 revs/min magnetic agitation 10 hours；120 microlitre of 15% sodium hydroxide ammonium hydroxide is drawn with liquid-transfering gun, is added to
In the solution prepared, solution ph=7.6-8.5 is adjusted, continues magnetic agitation, about solution becomes viscous shape after ten minutes, adds
Enter polyimide fiber 3g, mechanical stirring is to being uniformly mixed；The gel mixed is sealed with preservative film, shady place stands 3 days；
Supernatant liquor after standing is poured out, about 100 milliliters of methanol is added, is put into baking oven, 60 DEG C of progress solvent displacements, about 6 is small every time
When, it replaces 3 times repeatedly；Gel after displacement is put into specified mold, the gel in extrusion die reaches about 15%
Product is placed on shady place and stands 12h by water content；Gel is inserted again, until filling up mold, without obvious crackle, gap, is placed on
After shady place stands 12h, with liquid nitrogen frozen 20min, it is then placed in freeze drier and is freeze-dried 24 hours, demould to get production
Object.
Embodiment product property:
Grammes per square metre: 115g/ ㎡, thickness: 1 ㎝, longitudinal strength 500N, lateral strength 450N, 300 ± 20 DEG C of high temperature resistant.
Claims (9)
1. a kind of preparation method of one step shaping seamless filter bag, it is characterised in that method includes the following steps:
(1) Gel Precursor, dehydrated alcohol and water are mixed according to the ratio that volume ratio is 55-80:10-50:20-40
It closes, acidic catalyst is added and adjusts pH=1-3, is evenly stirred until clear solution；PH=7.6-8.5 is adjusted with basic catalyst, after
High-temperature fibre is added in continuous stirring 8-10 minutes, and stirring is to being uniformly mixed, and sealing aging 3-7 days, is stood, and supernatant liquor falls
Out, organic solvent is added, solvent is carried out at 60 DEG C -80 DEG C and replaces to obtain gel；
(2) gel is put into mold, the water content of 5-30% is reached by squeezing, stood 10-12h, insert gel again, directly
To mold is filled up, 5-24h is stood, it is dry.
2. the preparation method of one step shaping seamless filter bag according to claim 1, it is characterised in that the step (1) in coagulate
Glue presoma is tetraethyl orthosilicate, trimethoxyvinyl silane, waterglass.
3. the preparation method of one step shaping seamless filter bag according to claim 1, it is characterised in that the step is (1) middle sour
Property catalyst be one or more of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid.
4. the preparation method of one step shaping seamless filter bag according to claim 1, it is characterised in that the step (1) in alkali
Property catalyst be one or more of ammonium hydroxide, sodium hydroxide, sodium carbonate, sodium bicarbonate.
5. the preparation method of one step shaping seamless filter bag according to claim 1, it is characterised in that the high-temperature fibre
For one of polytetrafluoroethylene fibre, polyphenylene sulfide fibre, polyimide fiber, basalt fibre, alkali-free glass fibre or
It is several.
6. the preparation method of one step shaping seamless filter bag according to claim 1, it is characterised in that the organic solvent is
One or more of ethyl alcohol, n-hexane, acetone, methanol, isooctane, each time swap are 1h-12h.
7. the preparation method of one step shaping seamless filter bag according to claim 1, it is characterised in that the water content is
10%-20%, preferably 15%-16%.
8. the preparation method of one step shaping seamless filter bag according to claim 1, it is characterised in that described when standing again
Between be 10h-15h, preferably 12h-14h.
9. the preparation method of one step shaping seamless filter bag according to claim 1, it is characterised in that the drying mode packet
Drying is included, is freeze-dried, supercritical drying.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811289415.XA CN109499204A (en) | 2018-10-31 | 2018-10-31 | A kind of preparation method of one step shaping seamless filter bag |
| PCT/CN2018/121629 WO2020087686A1 (en) | 2018-10-31 | 2018-12-18 | Method for manufacturing seamless filter bag in one operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811289415.XA CN109499204A (en) | 2018-10-31 | 2018-10-31 | A kind of preparation method of one step shaping seamless filter bag |
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| Publication Number | Publication Date |
|---|---|
| CN109499204A true CN109499204A (en) | 2019-03-22 |
Family
ID=65747280
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811289415.XA Pending CN109499204A (en) | 2018-10-31 | 2018-10-31 | A kind of preparation method of one step shaping seamless filter bag |
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|---|---|
| CN (1) | CN109499204A (en) |
| WO (1) | WO2020087686A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823867A (en) * | 2009-03-02 | 2010-09-08 | 中国科学院过程工程研究所 | Preparation method of SiO2 aerogel composite material doped with aramid fibre |
| CN102531521A (en) * | 2012-02-21 | 2012-07-04 | 湖北三江航天江北机械工程有限公司 | Method for preparing wave-transmission SiO2 aerogel heat-insulation composite material by using normal-pressure drying equipment |
| CN107216115A (en) * | 2017-06-26 | 2017-09-29 | 南京工业大学 | A kind of PTFE fiber cloth composite graphite alkene SiO2The preparation method of aeroge |
| CN108290744A (en) * | 2016-10-12 | 2018-07-17 | 株式会社Lg化学 | Aerogel blanket, its manufacturing method and its construction method for superhigh temperature |
| CN108569912A (en) * | 2018-04-29 | 2018-09-25 | 浙江工业大学 | A kind of preparation method of hydrophobic type aerosil composite fibre felt material |
-
2018
- 2018-10-31 CN CN201811289415.XA patent/CN109499204A/en active Pending
- 2018-12-18 WO PCT/CN2018/121629 patent/WO2020087686A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823867A (en) * | 2009-03-02 | 2010-09-08 | 中国科学院过程工程研究所 | Preparation method of SiO2 aerogel composite material doped with aramid fibre |
| CN102531521A (en) * | 2012-02-21 | 2012-07-04 | 湖北三江航天江北机械工程有限公司 | Method for preparing wave-transmission SiO2 aerogel heat-insulation composite material by using normal-pressure drying equipment |
| CN108290744A (en) * | 2016-10-12 | 2018-07-17 | 株式会社Lg化学 | Aerogel blanket, its manufacturing method and its construction method for superhigh temperature |
| CN107216115A (en) * | 2017-06-26 | 2017-09-29 | 南京工业大学 | A kind of PTFE fiber cloth composite graphite alkene SiO2The preparation method of aeroge |
| CN108569912A (en) * | 2018-04-29 | 2018-09-25 | 浙江工业大学 | A kind of preparation method of hydrophobic type aerosil composite fibre felt material |
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| Publication number | Publication date |
|---|---|
| WO2020087686A1 (en) | 2020-05-07 |
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