CA1105666A - Method and device for treating fibrous or particulate material - Google Patents
Method and device for treating fibrous or particulate materialInfo
- Publication number
- CA1105666A CA1105666A CA299,810A CA299810A CA1105666A CA 1105666 A CA1105666 A CA 1105666A CA 299810 A CA299810 A CA 299810A CA 1105666 A CA1105666 A CA 1105666A
- Authority
- CA
- Canada
- Prior art keywords
- web
- treatment
- chamber
- carrier medium
- distribution
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Nonwoven Fabrics (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Sampling And Sample Adjustment (AREA)
- Developing Agents For Electrophotography (AREA)
- Drying Of Solid Materials (AREA)
Abstract
METHOD AND APPARATUS FOR TREATING FIBROUS
OR PARTICULATE MATERIAL
Abstract of the Disclosure A web is formed from fibrous or particulate material in a treatment station by depositing the material on a deposition surface in a distribution chamber. The particulate material is introduced into the distribution chamber at its top by a carrier air stream which is distributed across the surface by control flows on the opposite sides of the stream. The particulate material is treated as it is carried by the air stream both in advance of.
the treatment station and as it is distributed across the dis-tribution chamber. The carrier medium is conditioned by heating, cooling or moistening to heat, cool or moisten the material.
Further treatment of the material is obtained by exhausting the conditioned carrier through the deposition surface, and/or by conveying the web through a subsequent treating station. Additional treatment may be accomplished before entraining the material into the carrier medium.
OR PARTICULATE MATERIAL
Abstract of the Disclosure A web is formed from fibrous or particulate material in a treatment station by depositing the material on a deposition surface in a distribution chamber. The particulate material is introduced into the distribution chamber at its top by a carrier air stream which is distributed across the surface by control flows on the opposite sides of the stream. The particulate material is treated as it is carried by the air stream both in advance of.
the treatment station and as it is distributed across the dis-tribution chamber. The carrier medium is conditioned by heating, cooling or moistening to heat, cool or moisten the material.
Further treatment of the material is obtained by exhausting the conditioned carrier through the deposition surface, and/or by conveying the web through a subsequent treating station. Additional treatment may be accomplished before entraining the material into the carrier medium.
Description
3L3L~S~i6~
. . - -- -This invention i~ an improvement upon the inven~lon of the prior Canadian Pat. Appln. S.N. 261,048, filed September 13, ,, 1976, which describes a method and a device for forming a web~ i According to said invention, the web is ormed by supplying fibres or other particulate material dispersed in transporting air tc~ a distribution chamber. In the distribution chamber the ¦
material stream is exposed to strong impulses from control jets, which spread the material in the distribution chamber in the form of a fibre curtain depositing on the receiving surface. This method of forming a web has proved very efficient with very good yield witl~ respect to uni~ormity and quality in general of the web formed. ~le present invent~on, which is an improvement to the above patent, is based on the understandin~, that the method and the device describe~ in the patent c~n be given ~
wider application. ~liS iS achieved by the method and the device as defined in the attached clai~s. ~
The method and the device described in the priox patent, are utilized for treating the material while the web is , ~ . .... .. _ ..
being formed, which treatment L~ay constitute one or more links in a whole material-processin~ chain. Such treatment is rendered possible thereby, that the material flow in the distribution chamber is subjected to a very stron~ effect of impulses from ~he control flows~ which gives rise to a heavy turbulence of the material flow and the transporting gas in the distribution chamber. ~le treatment, thus~ i5 carried out during the spreading and depositing process and also during the step of suclcing-through, I
I `
...
~t ~L~¢I 56~
which takes place when the transportinp, ~as passes through the ; web formed and is sucked off through the suction-~ox disposed - ' beneath the distribution surface.
According to the invention, the transporting gas is givetn a condition adapted for treating the material~thereby.
The gas, prior to its supply to the distribtution chamber, is subjected in conventional manner to heating, cooling~ moistening or other desired conditioning. This conditioning can also apply to the control flows. The invention, further, is based ` thereon that the treatment in connection with the forming of the web can be incorporated as a part of the whole processing operation to which the material is to be subjected. The material, thus, prior to its supply to the distribution chamber can be dried in pneumatic driers of conventional type or be subjected to other treatment, for example cooling, moistening, and also t~ ' the web forDed can be subjected to a further treatment, for t,t exi~mple cooling.
ttt The invention is described in greater detail hereafter, with reference to the accom~anying drawings showing the invention in a schematic manner. (The design of the distribution chamber and associated components is described in greater detail in the prior patent and the co-pending application of Gustavasson, Serial No.
_ Fig. l shows a treatment station and a conventionai drying step;
Fig. 2 shows a treatment station and a conventional drying step ~ith a cyclone therebetween; r ~ .
~ Fig. 3 shows treatment stations connected in parallel; an~
jt ~ ' Fig. 4 shows treatment s~iations connected in series. I
t~ .,' ' ' ;~.
~ - 2 ~
5~1~,6 In Fig. 1, the numeral 1 de~ignates a distribution chamber having a top feed openin~ to which the material in - ' dispersed state is supplied in a ~aseous carrier medium through the distribution conduit 2 and the nozzle 3. In the distribution chamber blow-boxes 11, 12 are provided for supplying control flows. Beneath the distribution chamber there i5 a distribution surface in the form of a running conveyor'5 in the form of an endless wire or felt, with a suction box 6 beneath the same.
A fan 7 is provided for the removal of the gaseous medium for--the suction box. The detailed design of the forming station is apparent ~rom the description and the drawin~s in the prior patent. r~le material to be treated according to the invention is supplied to a feed sluice - possibly a material disintegrator lOl -and thereafter by help of a fan system 100 passed to a pneumatic drier 10 , from ~here the material is transported,,through the distribution conduit 2 to the forming station conditioning meansp such as heating means 103, or a cooling means or moistening means effects conditioning of the transporting gas adapting it for the desired treatment. The control flow may also be effected with conditioned air, by feeding the control valve 112 for the control flow with mediu~ from the conditionin~ mcans,103,to supplement, the treatrnent provided by the carrier medium.
In the distribution chamber the materiaI stream is subjected to treatment by the transporting gas, whic~ when being J
sucked into the suction box 6 through the ~eb formed,additionally treats the material. The web formed is passed by the conveyor to a possible further treatment. In the embodiment sho~m in Fig. l, for example, the web is compressed in a roller press 104 and deposited in a receiving tray.
` _ 3 -356~f~
In Fig. 2 an installation similar to that in Fig. 1 is sho~n, with the difference, ho~ever, that a cyclone separator 105 is provided between thP pneumatic drier 102 and the forming station~ and the separated material is entrained in a separate flow of conditioned carrier medium from the conditioner 3 and is blo~n through the conduit 2 by a blower 105a. Furthermore, the web is ~ound up after being pressed. An additional drying ~or cooling) step, of course, can be added, with or withvut intermediate separation,-prior to the treatment of khe material in the distribution chamber 1~ -Fig. 3 shows an installation with two distributioncham~ers (la and lb) arranged one after the other. The material is dried in pneumatic driers 102a and 102b and supplied in parallel to the respective distribution chambers. ~le conveyor 5 travels in sequence through the rhambers la and lb sO that the material is formed on the surface in two superimposed layers.
The layershere formed, thus, can be of different kind and consist of different particles or fibres, depending on the material fed into the material sluices lOla and lOlbo The Figure also shows an additional treatment step of the web. Through the suction box 106, for example, treated or ambient air can be sucked through the web to cool the same.' In Fig. 4 a multi-step method of treatin~ material according to the invention is shown. The material is supplied to the r~laterial sluice 101 and subjected to treatment as described with reference to Fig. l~ Thereafter the material thus treated is passed via a material feed sluice 107 (possibly including into a further treatment ~tage, for example, material disintegra-~ion) add~tional pneumatic drying in a pneumatic drier 102c and further treattent in the distribution chamber Lc. ~ ¦
_ 4 -; : , , . :
~ Si66~i The web formed in any of the treatment apparatus described above may be collected in loose form or on a roll, or may he disinte~rated by cuttin~, shredding, or the like, and may then be baled, pelletized or shaped into other forms, - as desired.
- ~le Figures illustrate only examples of different combinations, in which the invention is applied to the treatment of a particulate and fibrous material in connection ~ith the forming of a web.
In order to elucidate still ~ore the importance of -the invention, in the ~ollowing example an application of the invention is described which deviates fro~ conventional techniques and offers great advanta~es~ In drying cellulose flakes by so:
called fling-drying, the cellulose is exposed both to drying steps in pneumatic driers and to cooling steps. The dried flakes thereafter are compressed in a plate press and baled,-With this method it is difficult to obtain a sufficiently low moisture content at the drying and, moreover, the compressing and baling operations of the dried cellulose flakes limit the capacity of the entire installation, ~ecause plate presses in I)ractice cannot be designed to run as fast as desired with - -material in this condition. The present invention solves this problem by passing the cellulose from the pneumatic driers to a treatment station where the cellulose by additional treatment is dried and formed into a web, which9 after a possible subsequent cooling step by suckin~-through~ the web is compressed in a roller press, wherealter the compressed web,can be disintegrated for bale pressing, which now can bP carried out quickly with pla~e ~resses of ~,reat capacity. Another alternative is to carry out ~ j~
the cooling directly during the forming of the web in the dis~
tribution chambers, whereafter ~he web is compressed in the roll~r press.
"
. . - -- -This invention i~ an improvement upon the inven~lon of the prior Canadian Pat. Appln. S.N. 261,048, filed September 13, ,, 1976, which describes a method and a device for forming a web~ i According to said invention, the web is ormed by supplying fibres or other particulate material dispersed in transporting air tc~ a distribution chamber. In the distribution chamber the ¦
material stream is exposed to strong impulses from control jets, which spread the material in the distribution chamber in the form of a fibre curtain depositing on the receiving surface. This method of forming a web has proved very efficient with very good yield witl~ respect to uni~ormity and quality in general of the web formed. ~le present invent~on, which is an improvement to the above patent, is based on the understandin~, that the method and the device describe~ in the patent c~n be given ~
wider application. ~liS iS achieved by the method and the device as defined in the attached clai~s. ~
The method and the device described in the priox patent, are utilized for treating the material while the web is , ~ . .... .. _ ..
being formed, which treatment L~ay constitute one or more links in a whole material-processin~ chain. Such treatment is rendered possible thereby, that the material flow in the distribution chamber is subjected to a very stron~ effect of impulses from ~he control flows~ which gives rise to a heavy turbulence of the material flow and the transporting gas in the distribution chamber. ~le treatment, thus~ i5 carried out during the spreading and depositing process and also during the step of suclcing-through, I
I `
...
~t ~L~¢I 56~
which takes place when the transportinp, ~as passes through the ; web formed and is sucked off through the suction-~ox disposed - ' beneath the distribution surface.
According to the invention, the transporting gas is givetn a condition adapted for treating the material~thereby.
The gas, prior to its supply to the distribtution chamber, is subjected in conventional manner to heating, cooling~ moistening or other desired conditioning. This conditioning can also apply to the control flows. The invention, further, is based ` thereon that the treatment in connection with the forming of the web can be incorporated as a part of the whole processing operation to which the material is to be subjected. The material, thus, prior to its supply to the distribution chamber can be dried in pneumatic driers of conventional type or be subjected to other treatment, for example cooling, moistening, and also t~ ' the web forDed can be subjected to a further treatment, for t,t exi~mple cooling.
ttt The invention is described in greater detail hereafter, with reference to the accom~anying drawings showing the invention in a schematic manner. (The design of the distribution chamber and associated components is described in greater detail in the prior patent and the co-pending application of Gustavasson, Serial No.
_ Fig. l shows a treatment station and a conventionai drying step;
Fig. 2 shows a treatment station and a conventional drying step ~ith a cyclone therebetween; r ~ .
~ Fig. 3 shows treatment stations connected in parallel; an~
jt ~ ' Fig. 4 shows treatment s~iations connected in series. I
t~ .,' ' ' ;~.
~ - 2 ~
5~1~,6 In Fig. 1, the numeral 1 de~ignates a distribution chamber having a top feed openin~ to which the material in - ' dispersed state is supplied in a ~aseous carrier medium through the distribution conduit 2 and the nozzle 3. In the distribution chamber blow-boxes 11, 12 are provided for supplying control flows. Beneath the distribution chamber there i5 a distribution surface in the form of a running conveyor'5 in the form of an endless wire or felt, with a suction box 6 beneath the same.
A fan 7 is provided for the removal of the gaseous medium for--the suction box. The detailed design of the forming station is apparent ~rom the description and the drawin~s in the prior patent. r~le material to be treated according to the invention is supplied to a feed sluice - possibly a material disintegrator lOl -and thereafter by help of a fan system 100 passed to a pneumatic drier 10 , from ~here the material is transported,,through the distribution conduit 2 to the forming station conditioning meansp such as heating means 103, or a cooling means or moistening means effects conditioning of the transporting gas adapting it for the desired treatment. The control flow may also be effected with conditioned air, by feeding the control valve 112 for the control flow with mediu~ from the conditionin~ mcans,103,to supplement, the treatrnent provided by the carrier medium.
In the distribution chamber the materiaI stream is subjected to treatment by the transporting gas, whic~ when being J
sucked into the suction box 6 through the ~eb formed,additionally treats the material. The web formed is passed by the conveyor to a possible further treatment. In the embodiment sho~m in Fig. l, for example, the web is compressed in a roller press 104 and deposited in a receiving tray.
` _ 3 -356~f~
In Fig. 2 an installation similar to that in Fig. 1 is sho~n, with the difference, ho~ever, that a cyclone separator 105 is provided between thP pneumatic drier 102 and the forming station~ and the separated material is entrained in a separate flow of conditioned carrier medium from the conditioner 3 and is blo~n through the conduit 2 by a blower 105a. Furthermore, the web is ~ound up after being pressed. An additional drying ~or cooling) step, of course, can be added, with or withvut intermediate separation,-prior to the treatment of khe material in the distribution chamber 1~ -Fig. 3 shows an installation with two distributioncham~ers (la and lb) arranged one after the other. The material is dried in pneumatic driers 102a and 102b and supplied in parallel to the respective distribution chambers. ~le conveyor 5 travels in sequence through the rhambers la and lb sO that the material is formed on the surface in two superimposed layers.
The layershere formed, thus, can be of different kind and consist of different particles or fibres, depending on the material fed into the material sluices lOla and lOlbo The Figure also shows an additional treatment step of the web. Through the suction box 106, for example, treated or ambient air can be sucked through the web to cool the same.' In Fig. 4 a multi-step method of treatin~ material according to the invention is shown. The material is supplied to the r~laterial sluice 101 and subjected to treatment as described with reference to Fig. l~ Thereafter the material thus treated is passed via a material feed sluice 107 (possibly including into a further treatment ~tage, for example, material disintegra-~ion) add~tional pneumatic drying in a pneumatic drier 102c and further treattent in the distribution chamber Lc. ~ ¦
_ 4 -; : , , . :
~ Si66~i The web formed in any of the treatment apparatus described above may be collected in loose form or on a roll, or may he disinte~rated by cuttin~, shredding, or the like, and may then be baled, pelletized or shaped into other forms, - as desired.
- ~le Figures illustrate only examples of different combinations, in which the invention is applied to the treatment of a particulate and fibrous material in connection ~ith the forming of a web.
In order to elucidate still ~ore the importance of -the invention, in the ~ollowing example an application of the invention is described which deviates fro~ conventional techniques and offers great advanta~es~ In drying cellulose flakes by so:
called fling-drying, the cellulose is exposed both to drying steps in pneumatic driers and to cooling steps. The dried flakes thereafter are compressed in a plate press and baled,-With this method it is difficult to obtain a sufficiently low moisture content at the drying and, moreover, the compressing and baling operations of the dried cellulose flakes limit the capacity of the entire installation, ~ecause plate presses in I)ractice cannot be designed to run as fast as desired with - -material in this condition. The present invention solves this problem by passing the cellulose from the pneumatic driers to a treatment station where the cellulose by additional treatment is dried and formed into a web, which9 after a possible subsequent cooling step by suckin~-through~ the web is compressed in a roller press, wherealter the compressed web,can be disintegrated for bale pressing, which now can bP carried out quickly with pla~e ~resses of ~,reat capacity. Another alternative is to carry out ~ j~
the cooling directly during the forming of the web in the dis~
tribution chambers, whereafter ~he web is compressed in the roll~r press.
"
Claims (18)
1. A method of treating a fibrous or particulate material using a distribution chamber having an inlet for receiving the material dispersed in a gaseous transporting medium, at least one control flow for spreading the material across the chamber and a distribution surface for receiving the material to form a web thereon, comprising at least one of the treatment steps of drying, cooling, and moistening, wherein at least one step in said treatment is carried out while the material is dispersed in the gaseous carrier medium as it is supplied to a distribution chamber and there by action of a control flow of gaseous medium is distributed across the chamber and formed into a web on the distribution surface, said step including the conditioning of the gaseous transporting medium prior to its being supplied to the distri-bution chamber to effect the desired treatment, subjecting the material to a heavy turbulent movement by the control flow during the distribution process in the distribution chamber and passing the gaseous transporting medium and the control flow away from the distribution chamber through the web formed on the distribution surface for further treating the material in the web.
2. A method according to claim 1 including the step of conditioning the air of said control flow to supplement the desired treatment by the carrier medium.
3. A method according to claim 1, wherein the material treatment is effected in a pneumatic drier through which the material is transported by said gaseous carrier medium before the material is supplied to said distribution chamber.
4. A method according to claim 3 including the step of separating the material from the carrier medium after the pneumatic drier and thereafter dispersing the separated material into a second gaseous carrier medium for supply to said distribution chamber.
5. A method according to claim 1, characterized in that the web is compressed after being formed on the distribution surface.
6. A method according to claim 1, characterized in that the web is wound up after being formed on the distribution surface.
7. A method according to claim 1, characterized in that the web is disintegrated after being formed on the distribution surface.
8. A method according to claim 7, characterized in that the web is disintegrated by shredding.
9. A method according to claim 7, characterized in that the web is pressed to bales.
10. A method according to claim 7 characterized in that the web is pelletized.
11. A method according to claim 7, characterized in that the material in the disintegrated web is passed to at least one additional distribution chamber for treatment and forming into a new web.
12. A method according to claim 1 wherein said material is formed into a web in at least two distribution chambers.
13. A method according to claim 12 wherein said distribution surface is passed in sequence through said two chambers to form a web in two superimposed layers thereon.
14. A method according to claim 12 wherein the web from the first chamber is disintegrated to provide the material supplied to the second chamber.
15. A method according to claim 1, characterized in that the material being treated consists of cellulose in the form of flakes.
16. A method according to claim 1, characterized in that the material being treated consists of wood fibres, bark, wood chips, mineral fibres or glass fibres.
17. In a device for treating fibrous or particulate material comprising at least one of drying, cooling, and moistening, at least one treatment station forming said material into a web for supplying the material and the gaseous carrier medium to the treatment station, having conditioning means for the carrier medium to condition the carrier medium for treating the material, and means to introduce the material into said conditioned medium in advance of its introduction into said station, said station having a distribution chamber with a top feed opening, control flow means to distribute the material across the width of said chamber and a deposition surface upon which said web is formed, and means for trans-porting away the web formed said device further comprising a plurality of treatment stations arranged adjacent to each other and cooperating to form a common web, each station having means to feed material and a conditioned carrier medium thereto.
18. In a device for treating fibrous or particulate material comprising at least one of drying, cooling, and moistening, at least one treatment station forming said material into a web for supplying the material and the gaseous carrier medium to the treatment station, having conditioning means for the carrier medium to condition the carrier medium for treating the material, and means to introduce the material into said conditioned medium in advance of its introduction into said station, said station having a distribution chamber with a top feed opening, control flow means to distribute the material across the width of said chamber and a deposition surface upon which said web is formed, and means for transporting away the web formed, said device further comprising at least two treatment stations arranged in series, and including intermediate means for disintegrating the web formed in the first treatment station and dispersing the material from said web into the conditioned carrier medium fed into said second station.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7703461-9 | 1977-03-25 | ||
| SE7703461A SE403586B (en) | 1977-03-25 | 1977-03-25 | KIT AND DEVICE FOR TREATMENT OF A FIBROST OR PARTICULATED MATERIAL, WHICH TREATMENT INCLUDES ONE OR SEVERAL OF THE STEPS DRYING, COOLING, MOISTURIZING |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1105666A true CA1105666A (en) | 1981-07-28 |
Family
ID=20330843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA299,810A Expired CA1105666A (en) | 1977-03-25 | 1978-03-28 | Method and device for treating fibrous or particulate material |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS53119379A (en) |
| CA (1) | CA1105666A (en) |
| DE (1) | DE2812361A1 (en) |
| NO (1) | NO150425C (en) |
| SE (1) | SE403586B (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE397943B (en) * | 1975-09-26 | 1977-11-28 | Svenska Flaektfabriken Ab | METHODS AND DEVICES FOR FORMING A MATERIAL PATH BY DEPOSITING IN A DISTRIBUTION CHAMBER INTRODUCING INTO GASY MEDIUM DISTRIBUTED STREAM OF PARTICLES, FOR EXAMPLE FIBERS, ON A DISTRIBUTION CHAMBER ... |
-
1977
- 1977-03-25 SE SE7703461A patent/SE403586B/en not_active IP Right Cessation
-
1978
- 1978-03-21 DE DE19782812361 patent/DE2812361A1/en not_active Ceased
- 1978-03-22 NO NO781029A patent/NO150425C/en unknown
- 1978-03-24 JP JP3402178A patent/JPS53119379A/en active Pending
- 1978-03-28 CA CA299,810A patent/CA1105666A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2812361A1 (en) | 1978-09-28 |
| NO781029L (en) | 1978-09-26 |
| NO150425B (en) | 1984-07-09 |
| SE403586B (en) | 1978-08-28 |
| NO150425C (en) | 1984-10-17 |
| JPS53119379A (en) | 1978-10-18 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |