CN101282774A - Method and apparatus for degassing coating color - Google Patents

Method and apparatus for degassing coating color Download PDF

Info

Publication number
CN101282774A
CN101282774A CNA2006800376174A CN200680037617A CN101282774A CN 101282774 A CN101282774 A CN 101282774A CN A2006800376174 A CNA2006800376174 A CN A2006800376174A CN 200680037617 A CN200680037617 A CN 200680037617A CN 101282774 A CN101282774 A CN 101282774A
Authority
CN
China
Prior art keywords
coating color
degasser
oscillation
gas
coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2006800376174A
Other languages
Chinese (zh)
Inventor
埃萨·福斯腾
埃罗·凯斯蒂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metso Paper Oy filed Critical Metso Paper Oy
Publication of CN101282774A publication Critical patent/CN101282774A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0021—Degasification of liquids by bringing the liquid in a thin layer
    • B01D19/0026—Degasification of liquids by bringing the liquid in a thin layer in rotating vessels or in vessels containing movable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0036—Flash degasification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
    • B01D19/0078—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042 by vibration
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/78—Controlling or regulating not limited to any particular process or apparatus

Abstract

The invention relates to method and apparatus for improving the degassing of coating color. In the method, coating color is supplied from a coating color storage (1) by supply means (2) to the degassing apparatus (4), inside which are means for separating gas from the coating color. Oscillatory action is applied to the coating color flow to be fed into the degassing apparatus, which causes the gas bubbles to integrate and/or their size to increase in the coating color flow fed into the degassing apparatus.

Description

The method and apparatus of degassing coating color
Technical field
The present invention relates to improve the method and apparatus of degassing coating color.
Background technology
In processing industry, liquid and mixing usually of composition can cause various problems such as what use in the gas of air and the operation.Especially when to paper or when similarly fiber mesh material applies, gentle the steeping oneself-meeting of the gas in the coating color causes the rough surface of coat paper, even causes not having the zone of coating at all.Than bigger in other coating color, more to many coating color of gas especially outstanding but this problem has been gathered than other coating color those in some coating colors for this problem.For example, contain the coating color of talcum because the character of talcum and contain a large amount of gas usually.The conspicuousness of this problem further is subjected to the influence of the coating method that adopted.For example, in curtain coating (curtain coating), the gas volume ratio content in the coating is 0-0.25% the most nearly.In addition, the gas of coated constraint can cause wanting coated material (on paper or plate) to produce uncoated areas.
In the multilayer curtain coating, the importance of the degassing is bigger.Therefore, for example under the situation of three layers of coating or four layers of coating, must the coating that be used to form each layer as far as possible carefully be outgased.
For remove to mix or be dissolved in gas in the coating color, for example various vacuum degasifers have been developed, comprise a kind of embodiment that is arranged on the rotary drum in the vacuum tank that has, coating color is provided in the rotary drum, coating color rises at the inwall of action of centrifugal force lower edge rotary drum, discharges from rotary drum and collides with the wall of vacuum tank with the form of film.The problem of the vacuum degasifer of prior art is their degassing efficiency deficiency, particularly for full-bodied material.This is because the minute bubbles that comprise in the full-bodied coating color, even be under the absolute pressure in high vacuum, can not increase to and break or because its specific climbing speed and the degree told.Attempted eliminating this problem by gas clean-up, however the result be, the solvent that uses in the coating color, water for example is highly susceptible to evaporation, thereby the solids content in the coating color is increased.The another kind of method of using is to increase the processing time, but can reduce the operational capacity of degasser like that, this means the size that more degasser must be housed or increase them.
Summary of the invention
The purpose of the method according to this invention and device provides a kind of improved degassing solution, and the gas that comprises in the coating color can be than being removed better in the past thus.
For reaching this purpose, relevant method of the present invention is characterised in that, in the method, position before degasser applies oscillation action to the coating color stream that will be admitted to degasser, so that be admitted to the bubble coalescence in the coating color stream of degasser or its size is increased.
Relevant device of the present invention, as its part, be characterised in that this device comprises oscillation device, this oscillation device is used for oscillation action is given birth in the coating color miscarriage that will be admitted to degasser, so that will be admitted to the bubble coalescence in the coating color stream of degasser or its size is increased, described oscillation device is positioned at the position before degasser on the coating color supply pipe.Described oscillation device preferably is provided with in the mode that does not contact coating color, for example, is arranged on the position on the outer surface of supply pipe.
The specific embodiment
The present invention will be described in more detail with reference to accompanying drawing hereinafter, and unique accompanying drawing schematically shows the degassing coating color device.
This device comprises coating color feedway 2, pump for example, and this coating color feedway 2 makes coating color flow to degasser 4 from coating color reservoir vessel 1, degasser 4 can be any known degasser.In the embodiment shown, degasser is the vacuumizing device that is connected to vacuum source 5.The absolute pressure of about 1kPa-15kPa preferably is provided in degasser 4.If lower absolute pressure is provided in operating room, this means that especially the evaporating point of the solvent that contains in the coating color can reduce, thus the risk that exists the quality of coating color to change because of the degassing.On the other hand, if higher absolute pressure is provided in operating room, then deficiency so that the size of the bubble in the coating color increase and remove bubble by vacuum means.Absolute pressure in the vacuum tank particularly preferably is about 3kPa-15kPa.The lower limit that improves the absolute pressure of using will guarantee better that coating color can not evaporate in degasification process.
The excavationg pump that the coating color that label 6 expressions are used for handling through the degassing flows is provided to application site by this pump with coating color, for example curtain coater.
According to the present invention, for example the coating color stream that will be provided to degasser by 3 pairs of ultrasonic oscillators applies oscillation action, this oscillator is set to combine 4 with the pipe 7 of linking degasser from pump 2, preferably on the outer surface of pipe, oscillator just can directly not contact with coating color like this.Preferably about 16 in the scope of about 60kHz, this can act on the bubble in the coating color to frequency of oscillation, thereby its bigger being easier to that become is for example removed by the degasser 4 of vacuumizing, perhaps breaks when it increases to enough greatly.By oscillation treatment, to compare with only using known degasser, degassing efficiency significantly increases.Oscillation treatment also can be carried out under far below the frequency of ultrasonic frequency.
The coating color that stands oscillation treatment can be in negative pressure, malleation or normal atmosphere and depress.Malleation for example is easy to reach by supply pump 2, and negative pressure for example can reach by utilizing the negative pressure in the degasser 4.

Claims (6)

1, a kind of method of improving degassing coating color, in the method, by feedway (2) described coating color is provided to degasser (4) from coating color storage portion (1), in this degasser, has the device that gas is separated from described coating color, it is characterized in that, in the method, position before described degasser applies oscillation action to the coating color stream that will be admitted to described degasser, so that be admitted to the bubble coalescence in the described coating color stream of described degasser and/or the size of bubble is increased.
2, the method for claim 1 is characterized in that, in the method, with ultrasonic frequency described coating color stream is applied oscillation action.
3, method as claimed in claim 2 is characterized in that, in the method, has used scope in 20 to 60kHz ultrasonic frequency.
4, as each the described method in the claim 1 to 3, it is characterized in that, the coating color that is in negative pressure, malleation or normal atmosphere (An) is carried out oscillation treatment.
5, a kind of device of removing the gas that comprises in the coating color, described device comprises feedway (2), this feedway is used for coating color is provided to degasser (4) from coating color storage portion (1), in described degasser, has the device that gas is separated from described coating color, it is characterized in that, the device of the gas that comprises in this removal coating color comprises oscillation device (3), this oscillation device (3) is used for oscillation action is given birth in the coating color miscarriage that will be admitted to described degasser (4), so that will be admitted to the bubble coalescence in the described coating color stream of described degasser and/or the size of bubble is increased, described oscillation device (3) is positioned at coating color supply pipe (7) and goes up a position before described degasser.
6, device as claimed in claim 5 is characterized in that, the device (3) of described generation vibration produces oscillation action by ultrasonic frequency.
CNA2006800376174A 2005-12-30 2006-12-05 Method and apparatus for degassing coating color Pending CN101282774A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20055713A FI20055713L (en) 2005-12-30 2005-12-30 Method and apparatus for removing gas from a coating material
FI20055713 2005-12-30

Publications (1)

Publication Number Publication Date
CN101282774A true CN101282774A (en) 2008-10-08

Family

ID=35510791

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2006800376174A Pending CN101282774A (en) 2005-12-30 2006-12-05 Method and apparatus for degassing coating color

Country Status (5)

Country Link
EP (1) EP1965884A4 (en)
JP (1) JP2009516581A (en)
CN (1) CN101282774A (en)
FI (1) FI20055713L (en)
WO (1) WO2007077295A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865187A (en) * 2010-05-18 2010-10-20 浙江大学 Ultrasonic on-line air removing device for hydraulic system
CN109424557A (en) * 2017-09-05 2019-03-05 辛耘企业股份有限公司 fluid delivery device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121122B (en) * 2006-01-26 2010-07-15 Metso Paper Inc Method and apparatus for processing and feeding to a coating device of a coating agent intended for coating a fiber web
DE102007000705A1 (en) * 2007-09-07 2009-03-12 Voith Patent Gmbh Device and method for degassing a liquid or pasty medium
DE102009031106B4 (en) 2009-06-29 2022-02-17 Khs Gmbh Process and device for degassing a liquid

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147677A (en) * 1936-01-22 1939-02-21 Submarine Signal Co Method of deaerating liquids
US3904392A (en) * 1973-03-16 1975-09-09 Eastman Kodak Co Method of and apparatus for debubbling liquids
US4070167A (en) * 1976-03-08 1978-01-24 Eastman Kodak Company Sonic apparatus for removing gas from photographic emulsion
JPS59156405A (en) * 1983-02-28 1984-09-05 Konishiroku Photo Ind Co Ltd Ultrasonic defoaming method and apparatus therefor
JPH09164353A (en) * 1995-12-18 1997-06-24 Nkk Corp Roll coater coating device
JP3572934B2 (en) * 1998-01-09 2004-10-06 Ｊｆｅスチール株式会社 Liquid defoaming device and liquid application device
JP2002079158A (en) * 2000-09-08 2002-03-19 Ricoh Co Ltd Dip coater and method for manufacturing electrophotographic photoreceptor
FR2819424A1 (en) * 2001-01-17 2002-07-19 Francois Quiviger Continuous degassing system, for liquids under pressure, uses ultrasound resonator to form gas bubbles
WO2003000594A1 (en) * 2001-06-22 2003-01-03 Procav Corporation Method and apparatus for treating fluid mixtures with ultrasonic energy
US6648943B2 (en) * 2001-12-21 2003-11-18 Eastman Kodak Company Integrated use of deaeration methods to reduce bubbles and liquid waste
JP2003210907A (en) * 2002-01-17 2003-07-29 Kodak Polychrome Graphics Japan Ltd Defoaming method for coating solution and defoaming system therefor
US6726743B2 (en) * 2002-06-18 2004-04-27 3M Innovative Properties Company Electrostatic deaeration method and apparatus
JP2004313990A (en) * 2003-04-18 2004-11-11 Canon Chemicals Inc Conductive member and manufacture method therefor
JP2005161164A (en) * 2003-12-01 2005-06-23 Fuji Photo Film Co Ltd Method for deaerating coating fluid and apparatus therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865187A (en) * 2010-05-18 2010-10-20 浙江大学 Ultrasonic on-line air removing device for hydraulic system
CN109424557A (en) * 2017-09-05 2019-03-05 辛耘企业股份有限公司 fluid delivery device

Also Published As

Publication number Publication date
EP1965884A4 (en) 2011-04-27
FI20055713A0 (en) 2005-12-30
FI20055713L (en) 2007-07-01
JP2009516581A (en) 2009-04-23
EP1965884A1 (en) 2008-09-10
WO2007077295A1 (en) 2007-07-12

Similar Documents

Publication Publication Date Title
US7935179B2 (en) Method and arrangement for exhausting gas from a coating material
CN101282774A (en) Method and apparatus for degassing coating color
US7879140B2 (en) Method and apparatus for degassing coating material
EP0481746A1 (en) Recovery of surfactant from papermaking process
JP4897823B2 (en) Method for processing and supplying a color coating used to coat a fiber web to a coating device
JP3548105B2 (en) Pressure flotation device
JPH11200270A (en) Waste paper deinking treatment and flotater
JP2000167457A (en) Impregnation device and impregnation method
JP2803540B2 (en) Continuous deaerator
KR20050023147A (en) A device of removing air in oil tank
US20230063110A1 (en) Slurry processing apparatus, microbubble generation equipment, and slurry processing method
JP2009247959A (en) Method of separating sewage
JP2003039430A (en) Method and apparatus for immersing with resin by ultrasonic wave
JPS58153549A (en) Centrifugal separating and defoaming device
JP2003001009A (en) Apparatus for removing dissolved oxygen
JP2006122812A (en) Coater
JP2007075743A (en) Coating method and coating applicator
JP2003164704A (en) Separation apparatus for mixed solution utilizing surface excess phenomenon
JP2002143789A (en) Method and apparatus for water replacement
JPH0386273A (en) Method for continuous coating of sheet
JPH03255158A (en) Production of green sheet of ceramic
JPH0920833A (en) Production of polyvinyl alcohol coat film
JPH0620521B2 (en) Continuous processing equipment for highly viscous substances

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Open date: 20081008