SE508286C2 - Grinding elements for disc refiners with booms and intermediate tracks and channels for free passage of steam - Google Patents
Grinding elements for disc refiners with booms and intermediate tracks and channels for free passage of steamInfo
- Publication number
- SE508286C2 SE508286C2 SE9700304A SE9700304A SE508286C2 SE 508286 C2 SE508286 C2 SE 508286C2 SE 9700304 A SE9700304 A SE 9700304A SE 9700304 A SE9700304 A SE 9700304A SE 508286 C2 SE508286 C2 SE 508286C2
- Authority
- SE
- Sweden
- Prior art keywords
- booms
- channels
- grooves
- grinding element
- grinding
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/12—Shape or construction of discs
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/30—Disc mills
- D21D1/306—Discs
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Paper (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
508 286 2 kapacitet och driftstabilitet. Även det fibermaterial som befinner sig i spåren hindrar ångflödet. 508 286 2 capacity and operational stability. The fibrous material in the grooves also obstructs the flow of steam.
Enligt det europeiska patentet 179 041 är malelementet utformat med breda kanaler utan bommar vilka kanaler sträcker sig utåt genom den yttre delen av malelementet. Kanalerna är böjda i malelementets avsedda rotationsriktning. Ångan kan därmed strömma utåt genom kanalerna samtidigt som fibermateri- alet på grund av malelementets rotation hindras att följa med.According to European patent 179 041, the grinding element is formed with wide channels without bars, which channels extend outwards through the outer part of the grinding element. The channels are bent in the intended direction of rotation of the grinding element. The steam can thus flow outwards through the channels at the same time as the fibrous material is prevented from following due to the rotation of the grinding element.
Dessa kanaler minskar dock storleken på malelementets bearbe- tande yta och därmed dess effektivitet.However, these channels reduce the size of the grinding element's machining surface and thus its efficiency.
Föreliggande uppfinning innebär att ovanstående problem kan reduceras samtidigt som ytterligare fördelar erhålles be- träffande kvaliteten på det raffinerade materialet. Enligt uppfinningen utformas malelement med kanaler för ångan vilka är anordnade i nivå med malelementets basyta så att bommarnas överkanter lämnas obrutna.The present invention means that the above problems can be reduced while obtaining additional advantages regarding the quality of the refined material. According to the invention, grinding elements are formed with channels for the steam which are arranged at a level with the base surface of the grinding element so that the upper edges of the booms are left unbroken.
Genom denna utformning av malelementet kommer fiberma- terialet att bearbetas effektivt av obrutna bomkanter i malspalten mellan malelementen på de två motstående malskivor- na. Samtidigt kan den genererade ångan avledas genom kanalerna utan att hindra eller störa materialflödet genom malspalten.Through this design of the grinding element, the fibrous material will be processed efficiently by unbroken boom edges in the grinding gap between the grinding elements on the two opposite grinding wheels. At the same time, the generated steam can be diverted through the channels without obstructing or disturbing the flow of material through the grinding gap.
På detta sätt kan raffinörens kapacitet ökas samtidigt som massakvaliteten kan förbättras.In this way, the capacity of the refiner can be increased while the pulp quality can be improved.
Uppfinningens närmare kännetecken framgår av patent- kraven.The more detailed features of the invention appear from the patent claims.
I det följande skall uppfinningen beskrivas närmare under hänvisning till figurerna som visar två utföringsformer av uppfinningen.In the following, the invention will be described in more detail with reference to the figures which show two embodiments of the invention.
Fig 1 visar ett malelement avsett för en plan del av en malskiva i en skivraffinör; Fig 2 visar ett snitt enligt II-II i fig 1; 5Ü8 286 3 Fig 3 visar ett malelement för en konisk del av en malskiva i en skivraffinör; Fig 4 visar ett snitt enligt IV-IV i fig 3.Fig. 1 shows a grinding element intended for a flat part of a grinding wheel in a board refiner; Fig. 2 shows a section according to II-II in Fig. 1; Fig. 3 shows a grinding element for a conical part of a grinding wheel in a board refiner; Fig. 4 shows a section according to IV-IV in Fig. 3.
Malelementet enligt fig 1 är plant och avsett att placeras på en plan del av en malskiva i en skivraffinör. På malelementets basyta 1 är huvudsakligen radiella bommar 2 anordnade i en yttre del 3 samt huvudsakligen radiella grövre bommar 4 i en inre del 5. Bommarna 2 är placerade så att mellanliggande spår 6 bildas. I spåren kan även flödesrestrik- tioner, sk dammar, anordnas.The grinding element according to Fig. 1 is flat and is intended to be placed on a flat part of a grinding wheel in a board refiner. On the base surface 1 of the grinding element, substantially radial booms 2 are arranged in an outer part 3 and substantially radial coarser booms 4 in an inner part 5. The booms 2 are placed so that intermediate grooves 6 are formed. Flow restrictions, so-called dams, can also be arranged in the tracks.
I nivå med basytan 1 sträcker sig kanaler 7 under bommarna 2 och snett i förhållande till bommarnas riktning.At the level of the base surface 1, channels 7 extend below the bars 2 and obliquely in relation to the direction of the bars.
Bommarnas 2 överkanter lämnas därmed obrutna. Kanalerna 7 medger fri passage av ånga utåt och inåt utan hinder av bom- marna 2 och det material eller flödesrestriktioner, som befin- ner sig i spåren 6 mellan bommarna 2.The 2 upper edges of the bars are thus left unbroken. The channels 7 allow free passage of steam outwards and inwards without obstruction of the booms 2 and the material or flow restrictions which are located in the grooves 6 between the booms 2.
Malelementet enligt fig 3 är böjt för att placeras på en konisk del av en malskiva i en skivraffinör. Det kan vara en yttre konisk del av en malskiva belägen utanför en inre plan del i en skivraffinör eller en helt konisk malskiva.The grinding element according to Fig. 3 is bent to be placed on a conical part of a grinding wheel in a board refiner. It can be an outer conical part of a grinding wheel located outside an inner flat part of a disc refiner or a completely conical grinding wheel.
På malelementets basyta 11 är bommar 12 placerade vilka åtskiljs av mellanliggande spår 13. I spåren är flödesrestrik- tioner 14, sk dammar, anordnade för att tvinga materialet upp ur spåren för bearbetning mellan de övre kanterna av bommarna 12 på motstående malskivors malelement. Enligt denna utfö- ringsform är kanaler 15 anordnade i nivå med basytan 11 under flödestriktionerna 14. Därigenom kan ångan passera under flödesrestriktionerna 14 utan att hindras eller störas av materialflödet.On the base surface 11 of the grinding element, booms 12 are placed which are separated by intermediate grooves 13. In the grooves, flow restrictions 14, so-called dams, are arranged to force the material out of the grooves for processing between the upper edges of the booms 12 on opposite grinding wheel grinding elements. According to this embodiment, channels 15 are arranged at the level of the base surface 11 during the flow restrictions 14. Thereby the steam can pass under the flow restrictions 14 without being hindered or disturbed by the material flow.
Claims (4)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9700304A SE508286C2 (en) | 1997-01-31 | 1997-01-31 | Grinding elements for disc refiners with booms and intermediate tracks and channels for free passage of steam |
PCT/SE1998/000109 WO1998033594A1 (en) | 1997-01-31 | 1998-01-27 | Refining element |
AU58886/98A AU5888698A (en) | 1997-01-31 | 1998-01-27 | Refining element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9700304A SE508286C2 (en) | 1997-01-31 | 1997-01-31 | Grinding elements for disc refiners with booms and intermediate tracks and channels for free passage of steam |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9700304D0 SE9700304D0 (en) | 1997-01-31 |
SE9700304L SE9700304L (en) | 1998-08-01 |
SE508286C2 true SE508286C2 (en) | 1998-09-21 |
Family
ID=20405593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9700304A SE508286C2 (en) | 1997-01-31 | 1997-01-31 | Grinding elements for disc refiners with booms and intermediate tracks and channels for free passage of steam |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU5888698A (en) |
SE (1) | SE508286C2 (en) |
WO (1) | WO1998033594A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8028945B2 (en) * | 2007-05-31 | 2011-10-04 | Andritz Inc. | Refiner plates having steam channels and method for extracting backflow steam from a disk refiner |
SE541111C2 (en) * | 2017-06-19 | 2019-04-09 | Valmet Oy | Steam evacuation in a pulp or fiber refiner |
SE1751058A1 (en) | 2017-09-01 | 2018-12-11 | Valmet Oy | Refiner segment in a fiber refiner |
WO2019118859A1 (en) * | 2017-12-15 | 2019-06-20 | Andritz Inc. | Water relief groove to prevent cavitation of opposite refiner plate |
SG11202103297PA (en) * | 2018-10-11 | 2021-04-29 | Andritz Inc | Refiner plate having inter-bar wear protrusions |
SE545094C2 (en) * | 2021-03-24 | 2023-03-28 | Valmet Oy | Refiner segment |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI53469C (en) * | 1976-07-02 | 1978-05-10 | Enso Gutzeit Oy | MALSKIVA |
FI73256C (en) * | 1984-10-19 | 1987-09-10 | Yhtyneet Paperitehtaat Oy | Target segments. |
SE456223B (en) * | 1987-02-25 | 1988-09-19 | Sunds Defibrator | DISC REFINOR PAINTING ELEMENT |
-
1997
- 1997-01-31 SE SE9700304A patent/SE508286C2/en not_active IP Right Cessation
-
1998
- 1998-01-27 AU AU58886/98A patent/AU5888698A/en not_active Abandoned
- 1998-01-27 WO PCT/SE1998/000109 patent/WO1998033594A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
AU5888698A (en) | 1998-08-25 |
SE9700304L (en) | 1998-08-01 |
WO1998033594A1 (en) | 1998-08-06 |
SE9700304D0 (en) | 1997-01-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |