CN106149441A - A kind of high-efficiency vacuum deaerator - Google Patents
A kind of high-efficiency vacuum deaerator Download PDFInfo
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- CN106149441A CN106149441A CN201510198644.0A CN201510198644A CN106149441A CN 106149441 A CN106149441 A CN 106149441A CN 201510198644 A CN201510198644 A CN 201510198644A CN 106149441 A CN106149441 A CN 106149441A
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- coating
- bubble
- gap
- rotary drum
- vacuum deaerator
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- Degasification And Air Bubble Elimination (AREA)
Abstract
The invention discloses a kind of high-efficiency vacuum deaerator, specifically utilize centrifugal action mating holes/crack structure to separate the bubble in coating, then bubble rupture under vacuum with mechanical collision effect.Detailed process is, enter into the centrifugation through a segment distance for the coating in rotary drum, realize that coating is layered with bubble, continue to rise along rotatory drum wall subsequently, hole on rotatory drum wall or the combination in gap or hole and gap, under the action of the centrifugal coating is separated with bubble, and be thrown on vacuum tank inwall；Or enter next layer in multilayer rotary drum, then complete the layering of coating and bubble, separate, it is finally thrown on vacuum tank inwall；Under the effect clashed into, bubble is crashed through, it is achieved the separation of bubble and removal.This invention degassing effect is good, and coating air content ＜ 0.5% after degasification meets the requirement to low gas content amount for each production process.
Description
Technical field
The present invention relates to a kind of deaerator, be specifically related to a kind of high-efficiency vacuum deaerator.
Background technology
The industrial processes such as biochemistry, food, chemical industry generally exist " bubble interference " problem, as reduced the production effect of equipment
Rate, interference control measurement system, make that the mixing of each component is uneven, affect product appearance, pollute environment etc., to production process with
Product quality impacts.Some production process allows certain bubble, and the then requirement to bubble of some production processes is very severe
Carving, allowing the existence of any bubble hardly, the degassing efficiency of depassing unit is just had higher requirement by this.
At paper industry, the processes such as slurrying, papermaking and coating can be impacted by bubble.Compared with slurrying, paper-making process,
Owing to coating solids is higher, viscosity is relatively big, bubble is more difficult to remove, and it is bigger on the impact of coating.
The coating method of paper mainly has scraper for coating, metering size press coating, curtain coating etc., and wherein curtain coating is 20
A kind of novel non-contact profiling coating technique growing up the nineties in century, because of have coating coverage good, without scratch,
Line without orange peel, the advantage such as low is more and more paid close attention to by people to be required to body paper intensity.Curtain coating is in speciality paper field
Application is more ripe, also begins to promote, and have good application prospect in the coating paper of convention pigment coating produces.So
And, the main technical problem that curtain coating faces is exactly the air bubble problem in coating.Curtain coating requires containing in coating
Tolerance ＜ 0.5%, and do not allow air pocket to exist, therefore its degassing efficiency to deaerator requires very high.
Common coating depassing unit mainly has cyclone type to centrifuge degasification and vacuum degassing two ways.Cyclone type centrifuges the former of degasification
Reason is that coating is angled into deaerator, forms screw fluid, and under centrifugal action, low density bubble coalescence is being removed
Qi Qi center, forms an air zone, is then drawn out of constituent of air from centre, thus reaches degassing purpose.Vacuum degassing
Principle be that vacuum environment combines with mechanical centrifugal mode, i.e. coating is under vacuum and centrifugal action, formed film, by eyelet,
Bubble in coating is removed by the principles such as high-speed impact, reaches the purpose of degasification.
It is limited that cyclone type centrifuges degassing effect, is extremely difficult to higher degassing efficiency (generally about 70%).Current vacuum degassing
Mode is more common in actual applications, and it utilizes the rotation deaerating tank being placed under vacuum condition to carry out degasification.As patent is " a kind of
In coating vacuum degassing device " (application number CN 201420650553.7), centrifugation principle is utilized to enter the bubble in coating
Row separates；This device cross charging tray (deaerating tank) by try to get to the heart of a matter and multiple netted baffle plates form；During degasification, will be true by vavuum pump
Vacuumizing in empty storage barrel, so that forming negative pressure in bucket, after carrying alveolate coating to enter in bucket, net formula rotates through charging tray
High Rotation Speed, owing to coating proportion is high, de-off-grid type rotates through charging tray and flows into storage barrel bottom, and upper strata bubble is stored in bucket
Negative pressure is taken away in breaking up and bring into vacuum-pump line, thus realizes eliminating the purpose of bubble in coating；The method utilizes High Rotation Speed
Net formula rotate through charging tray coating and bubble separated, but the method is only applicable to low stick coating, for high stick coating, by
Relatively low in relative movement speed in coating for the bubble, coating is not readily separated with bubble, and bubble is depended merely on negative pressure and is also difficult to be hit simultaneously
Broken, it is therefore difficult to receive preferable degassing effect.Patent " the online deaerator of coating " (application number CN 200720091817.X)
In, utilize centrifugal bump effect to abolish the bubble in coating；Deaerating tank in this device is by deaerating tank bottom surface and deaerating tank baffle group
Becoming, deaerating tank bottom surface is netted；During degasification, under vacuum, coating enters in the deaerating tank of high-speed rotation, outwards throws away,
Impinging upon on deaerating tank Internal baffle, after bubble breaking, air is taken away by vavuum pump, and coating is downwardly towards tank body under gravity
Drainage conduit；The method utilizes the principle destruction bubble of vacuum and mechanical collision, and does not separates coating with bubble, for
For low stick coating, bubble is easy to rupture, even if being wrapped in coating, depending merely on vacuum action and being enough to make it break with mechanical collision
Broken, but for high stick coating, if bubble is wrapped in coating, it is impossible to be effectively separated, be difficult to make it rupture.
Therefore, a kind of high-efficiency degasification device or the method for applicable high viscosity coating developed is needed badly.
Content of the invention
For the deficiency of existing vacuum degasser, the invention provides a kind of new and effective vacuum degassing device, this device utilize from
Bubble in coating is separated by heart effect mating holes/crack structure, then bubble rupture under vacuum with mechanical collision effect.This
Invention is especially suitable for high viscosity, the degasification of high air content coating, can equally be well applied to low-viscosity dope, and degassing effect is stable, removes
Coating air content ＜ 0.5% after gas, meets the requirement to low gas content amount for each production process.
It is a feature of the present invention that:
(1) centrifugation through a segment distance for the coating in rotary drum is entered into, it is achieved coating is layered with bubble, subsequently along rotary drum
Wall continues to rise, and the combination in the hole on rotatory drum wall or gap or hole and gap, under the action of the centrifugal by coating and bubble
Separate, and be thrown on vacuum tank inwall；Or enter next layer in multilayer rotary drum, then complete coating and bubble layering,
Separate, be finally thrown on vacuum tank inwall；Under the effect clashed into, bubble is crashed through, it is achieved the separation of bubble and removal.Tool
Body is: the part of one section of not apertures/seam, referred to as centrifugation section are arranged at rotary drum bottom, and coating is made by centrifugal when rising along this part
With because coating is different from bubble density, bubble floats on surface, when coating reaches the hole on rotatory drum wall or seam, near rotatory drum wall
Bubble-free coating is first thrown out of rotary drum, and continues up away from the more coating of the bubbles of rotatory drum wall and climb so that bubble is turning
The time of staying in drum is elongated, and bubble is more enriched with simultaneously, strikes during baffle inner wall more easily rupturable；After coating strikes baffle plate,
Bottom of the drum can be flow to along baffle plate, repeat above-mentioned degassing procedure.
(2) a diameter of 1.0～2.5mm of aperture, is spaced apart 1.5～20mm.
(3) width in gap is 0.2～2.0mm, is spaced apart 3～20mm.
(4) can use aperture and the mode of gap combination, bottom is gap, and top is aperture.
(5) distance of centrifugation section is generally 5～50mm.
(6) number of plies of multilayer rotary drum is generally 1～3 layer.
(7) equipped with baffle plate between each layer rotary drum.
(8) this device degasification under vacuo, different according to coating property and drum form, vacuum is 15～80kpa.
Brief description
The structure principle chart that accompanying drawing 1 is vacuum degasser: 1-charging aperture；2-rotary drum；3-deaerator tank body；4-deaerator tank body
Conical section；5-discharging opening；6-splash guard；7-vacuum pumping opening；8-motor
The schematic diagram that accompanying drawing 2 is multilayer rotary drum: 1-internal layer rotary drum；2-rotary drum baffle plate；3-outer layer rotary drum；4-bottom of the drum；5-from
Heart segregation section；6-rotary drum hole/gap
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments be merely to illustrate the present invention and not
For limiting the range of application of the present invention, i.e. present disclosure applies equally to other industry.In addition, it is to be understood that reading the present invention
After the content lectured, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values are all contained in
In protection scope of the present invention.
Embodiment 1
Using individual layer rotary drum vacuum degasser to carry out degasification to coating, the hole diameter on rotary drum is 1.5mm, aperture pitch 4
Mm, bottommost aperture distance bottom of the drum distance is 15mm, and in deaerator, vacuum is 50kPa.Dope viscosity is
1200mPa s, coating density is 1.46g/cm3。
Utilizing the method degasification, air content of coating can be reduced to 0.22% by 13.1% before degasification, and degassing efficiency is 98.32%,
Meet curtain coating requirement.
Embodiment 2
Use double-deck rotary drum vacuum degasser to carry out degasification to coating, have the gap of 0.4mm above outer layer rotary drum, between gap
Every 5mm, bottommost clearance distance bottom of the drum 30mm；A gap of 0.6mm is had above internal layer rotary drum, gap length 5mm,
Bottommost clearance distance bottom of the drum 30mm.In deaerator, vacuum is 70kPa.Dope viscosity is 2500mPa.s, and coating is close
Degree is 1.58g/cm3。
Utilizing the method degasification, air content of coating can be reduced to 0.18% by 13.2% before degasification, and degassing efficiency is 98.63%,
Meet curtain coating requirement.
Claims (8)
1. a high-efficiency vacuum deaerator, it is characterised in that: enter into the centrifugation through a segment distance for the coating in rotary drum, it is achieved
Coating is layered with bubble, continues to rise along rotatory drum wall subsequently, the combination in the hole on rotatory drum wall or gap or hole and gap,
Under the action of the centrifugal coating is separated with bubble, and be thrown on vacuum tank inwall；Or next layer in entrance multilayer rotary drum,
Complete the layering of coating and bubble again, separate, be finally thrown on vacuum tank inwall；Under the effect clashed into, bubble is crashed through,
Realize separation and the removal of bubble.
2. a kind of high-efficiency vacuum deaerator as claimed in claim 1, it is characterised in that: a diameter of 1.0～2.5mm of aperture, interval
It is 1.5～20mm.
3. a kind of high-efficiency vacuum deaerator as claimed in claim 1, it is characterised in that: the width in gap is 0.2～2.0mm, interval
It is 3～20mm.
4. a kind of high-efficiency vacuum deaerator as claimed in claim 1, it is characterised in that: aperture and the mode of gap combination can be used,
Bottom is gap, and top is aperture.
5. a kind of high-efficiency vacuum deaerator as claimed in claim 1, it is characterised in that: the distance of centrifugation section is generally 5～50mm.
6. a kind of high-efficiency vacuum deaerator as claimed in claim 1, it is characterised in that: the number of plies of multilayer rotary drum is generally 1～3 layer.
7. a kind of high-efficiency vacuum deaerator as claimed in claim 1, it is characterised in that: equipped with baffle plate between each layer rotary drum.
8. a kind of high-efficiency vacuum deaerator as claimed in claim 1, it is characterised in that: the degasification under vacuo of this device, according to coating
Performance and drum form are different, and vacuum is 15～80kpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510198644.0A CN106149441A (en) | 2015-04-23 | 2015-04-23 | A kind of high-efficiency vacuum deaerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510198644.0A CN106149441A (en) | 2015-04-23 | 2015-04-23 | A kind of high-efficiency vacuum deaerator |
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| Publication Number | Publication Date |
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| CN106149441A true CN106149441A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510198644.0A Pending CN106149441A (en) | 2015-04-23 | 2015-04-23 | A kind of high-efficiency vacuum deaerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113002829A (en) * | 2021-03-25 | 2021-06-22 | 绵阳世诺科技有限公司 | Continuous gravity film easy-to-clean centrifugal discharge disc |
| CN112999702A (en) * | 2021-03-25 | 2021-06-22 | 绵阳世诺科技有限公司 | Continuous gravity film centrifugal discharge disc and application |
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| CN101171065A (en) * | 2005-06-02 | 2008-04-30 | 梅特索纸业有限公司 | Method and arrangement for exhausting gas from a coating material |
| DE102007000708A1 (en) * | 2007-09-07 | 2009-03-12 | Voith Patent Gmbh | Device for degassing fluid/pasty medium such as coating color for coating paper web/cardboard, comprises low pressure chamber in which low pressure is generatable, and inlet arrangement, which guides the medium in the low pressure chamber |
| DE102007000706A1 (en) * | 2007-09-07 | 2009-03-12 | Voith Patent Gmbh | Device for degassing fluid/pasty medium such as coating color for coating paper web/cardboard, comprises low pressure chamber in which low pressure is generatable, and inlet arrangement, which guides the medium in the low pressure chamber |
| CN102046255A (en) * | 2008-06-03 | 2011-05-04 | 皇家飞利浦电子股份有限公司 | Method and device for de-gassing a liquid-gas-mixture |
| CN201873903U (en) * | 2007-09-07 | 2011-06-22 | 沃依特专利有限责任公司 | Device for degassing liquid or pulpous medium |
| CN102188840A (en) * | 2010-03-09 | 2011-09-21 | 王文兵 | Centrifugal vacuum degassing device |
| DE102010043756A1 (en) * | 2010-11-11 | 2012-05-16 | Voith Patent Gmbh | Device for degassing coating color for coating e.g. paper web, has rotary disk that includes sieve edge whose upper open end is provided with circular ring-shaped splash guard running in radial direction |
| DE102010043772A1 (en) * | 2010-11-11 | 2012-05-16 | Voith Patent Gmbh | Device for degassing fluid or paste-like medium, particularly coating color for coating substrate, particularly running paper, cardboard or other fibrous web, has vacuum chamber with vertical rotary axis |
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2015
- 2015-04-23 CN CN201510198644.0A patent/CN106149441A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171065A (en) * | 2005-06-02 | 2008-04-30 | 梅特索纸业有限公司 | Method and arrangement for exhausting gas from a coating material |
| DE102007000708A1 (en) * | 2007-09-07 | 2009-03-12 | Voith Patent Gmbh | Device for degassing fluid/pasty medium such as coating color for coating paper web/cardboard, comprises low pressure chamber in which low pressure is generatable, and inlet arrangement, which guides the medium in the low pressure chamber |
| DE102007000706A1 (en) * | 2007-09-07 | 2009-03-12 | Voith Patent Gmbh | Device for degassing fluid/pasty medium such as coating color for coating paper web/cardboard, comprises low pressure chamber in which low pressure is generatable, and inlet arrangement, which guides the medium in the low pressure chamber |
| CN201873903U (en) * | 2007-09-07 | 2011-06-22 | 沃依特专利有限责任公司 | Device for degassing liquid or pulpous medium |
| CN102046255A (en) * | 2008-06-03 | 2011-05-04 | 皇家飞利浦电子股份有限公司 | Method and device for de-gassing a liquid-gas-mixture |
| CN102188840A (en) * | 2010-03-09 | 2011-09-21 | 王文兵 | Centrifugal vacuum degassing device |
| DE102010043756A1 (en) * | 2010-11-11 | 2012-05-16 | Voith Patent Gmbh | Device for degassing coating color for coating e.g. paper web, has rotary disk that includes sieve edge whose upper open end is provided with circular ring-shaped splash guard running in radial direction |
| DE102010043772A1 (en) * | 2010-11-11 | 2012-05-16 | Voith Patent Gmbh | Device for degassing fluid or paste-like medium, particularly coating color for coating substrate, particularly running paper, cardboard or other fibrous web, has vacuum chamber with vertical rotary axis |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113002829A (en) * | 2021-03-25 | 2021-06-22 | 绵阳世诺科技有限公司 | Continuous gravity film easy-to-clean centrifugal discharge disc |
| CN112999702A (en) * | 2021-03-25 | 2021-06-22 | 绵阳世诺科技有限公司 | Continuous gravity film centrifugal discharge disc and application |
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| C06 | Publication | ||
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100102 Zhongyang building, No. 4, Qiyang East Road, Wangjing, Chaoyang District, Beijing Applicant after: China pulp and Paper Research Institute Co., Ltd. Address before: 100102 Zhongyang building, No. 4, Qiyang East Road, Wangjing, Chaoyang District, Beijing Applicant before: China National Pulp & Paper Research Institute |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161123 |