EP3788200A1 - Waste paper dissolution - Google Patents
Waste paper dissolutionInfo
- Publication number
- EP3788200A1 EP3788200A1 EP19715061.8A EP19715061A EP3788200A1 EP 3788200 A1 EP3788200 A1 EP 3788200A1 EP 19715061 A EP19715061 A EP 19715061A EP 3788200 A1 EP3788200 A1 EP 3788200A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sorting
- collecting container
- zone
- zones
- section
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Definitions
- the invention relates to a process for the dissolution of fibrous materials, in particular waste paper, wherein the fibrous materials are fed to a dissolving section of a rotating drum and mixed there with water and the pulp suspension is passed from the dissolving section into a sorting section of the drum having a plurality of axially adjacent sorting zones. in each of which a division into a fine and a coarse fraction takes place, wherein the coarse fraction of a sorting zone passes into the respective axially adjacent, following sorting zone and the fine fraction of each sorting zone is guided in its own collection container with its own flow.
- the invention also relates to a rotating drum for the treatment of fibrous materials with at least one sorting section having a plurality of axially adjacent sorting zones, in each of which a division into a fine and a coarse fraction takes place, wherein the coarse fraction of a sorting zone in the respectively axially adjacent, following sorting zone passes and the fine fraction of each sorting zone is guided in a separate collection container with its own flow, in particular for carrying out the method.
- the waste paper mixed with water is comminuted in the dissolution zone by lifting, sliding and falling, or relative movements of the material parts to one another.
- the dissolved pulp is then to be separated from waste. While the fines fraction the perforation, i. the sorting openings of the drum passes, the coarse fraction with the debris is rejected and separately as
- the fiber losses are relatively high in difficult to dissolve fibers.
- the sorting can happen and affect the subsequent further treatment of the fine fraction and can even lead to blockages or spinning.
- the object of the invention is therefore to achieve an efficient dissolution of fibrous materials, in particular waste paper with the lowest possible fiber losses and as early as possible discharge of heavy parts.
- the object with regard to the method has been achieved in that the consistency in the collecting container of the first, following the dissolving section sorting zone is less than 6% and in the collecting container of the other sorting zones smaller than 2.5% and the fine fraction of the first sorting zone via an overflow of the Collection container of at least one further, following the first sorting zone sorting zone is diluted.
- the sedimentation is also supported by the overflow, which at the same time also directs fibers into the first sorting zone.
- the sorting section comprises only two sorting zones, which has a correspondingly positive effect on the Fier thoroughlysetzwand.
- the design of the collecting container of the other sorting zones, the sedimentation, especially the heavy parts are still promoted in the same.
- the collecting containers of the further sorting zones following the first sorting zone should have at least one inclined bottom section each to form a depression. This drain contains the drain of the respective collection container.
- the collecting container of the other sorting zones should also be free of agitators.
- the collecting containers of the sorting zones following the first sorting zone are designed as cones or truncated pyramids.
- water or fiber suspension should be fed to the collecting containers of the further sorting zones for dilution.
- the discharge of the heavy parts from the collecting containers of the further sorting zones can be facilitated because of the generally very limited space there in that the bottom of the further sorting zones is arranged above the bottom of the first sorting zone.
- the bottom of at least one collecting container, the sorting zones following the first sorting zone should be arranged at least 0.5 m, in particular at least 1 m, preferably at least 1.5 m higher than the bottom of the collecting container of the first sorting zone.
- At least one collecting container of the further sorting zones below the overflow should have an additional outlet, which is guided into the collecting container of the first sorting zone and / or its discharge line.
- the cross section of the collecting container of a first sorting zone is round or oval. This simplifies the manufacture and improves the stability.
- the dissolving section is used to dissolve fibrous materials, in particular waste paper, for which purpose the fibers are mixed with water.
- the size of the sorting openings of adjacent sorting zones may be the same or different. Often, however, the first sorting zone has smaller sorting openings than the subsequent second sorting zone.
- the fine fractions of the sorting zones also differ more from one another. Due to the larger sorting openings larger, difficult to dissolve substances get into the fine fraction. On the other hand remain very large rejects such as tarpaulins, bags or similar. in the drum.
- the coarse fraction of the last sorting zone is discharged as a reject from the drum, i. the rejection of the dissolution occurs only in one place.
- the cylindrical drum is normally mounted on rollers outside and is rotated by a drive in rotation, wherein the axis of rotation is slightly inclined to the horizontal.
- the drum has here, adjacent to the left end face, a dissolving section 1 with an inlet.
- the pulp is intensively mixed with water in the form of relatively easily dissolvable waste paper, whereby comminution of the softened paper material occurs as a result of the sliding, sliding and falling movements.
- the drum In order to support the movement of the waste paper and the resultant pulp suspension, the drum has on the inside of lifting strips or the like. Internals. Such installations are known in many forms and are tailored to the particular application.
- the fibrous suspension resulting from this dissolution has a consistency of about 18%.
- the cylindrical drum in the region of the sorting section 2 has a perforation through which fine fractions 10, 12 pass outwards.
- the sorting section 2 is often a water spraying device 14 for diluting the pulp suspension within the sorting zones 3,4 of the sorting section 2.
- the sorting section 2 is composed of two axially juxtaposed sorting zones 3,4, wherein the perforation of adjacent sorting zones 3,4, for example, in terms of the size of the sorting openings different. But it may also be advantageous if all sorting openings of the drum are the same size. In addition, the size of the sorting openings may differ within a sorting zone 3,4.
- the first sorting zone 3 adjoining the dissolving section 1 has hole sizes between 8 and 20 mm in diameter.
- a large part of the pulp suspension passes as a fine fraction 10 from the drum into a separate receptacle 5.
- the large and especially difficult to dissolve components arrive as a coarse fraction 11 from the first into a subsequent, second sorting zone 4.
- Their perforation comprises holes with a Diameter of more than 20 mm, preferably between 30 and 100 mm.
- the coarse fraction 13 of the second sorting zone 4 is removed as a reject from the drum.
- the consistency in the collecting container 5 of the first sorting zone 3 following the dissolving section 1 is smaller than 6% and in the collecting container 6 of the other one, i.e. in the collecting container 6. second sorting zones 4 less than 2.5%.
- the cross section of the collecting container 5 of the first sorting zone 3 is circular, wherein the diameter corresponds approximately to the diameter of the drum or is slightly larger. This is very stable, relatively easy to manufacture and facilitates mixing through agitators.
- the collecting container 6 of the second sorting zone 4 should promote the sedimentation of the heavy parts. Accordingly, the bottom of this collecting container 6 has at least one inclined bottom section 9 to form a depression.
- the entire bottom is formed by a plane inclined to the valley.
- the bottom of the collecting container 6 of the second sorting zone 4 in FIG. 2 has a conical or truncated pyramidal shape.
- the collection container 6 of the second sorting zone 4 water or fiber suspension can be supplied for dilution.
- an overflow 7 of the collecting container 6 of the second sorting zone 4 leads into the collecting container 5 of the first sorting zone 3, so that fibers are guided into the collecting container 5 of the first sorting zone 3, which minimizes their loss.
- the bottom, and specifically the lowest point, namely the depression of the collecting container 6 of the second sorting zone 4, is more than 1 m higher than the level bottom of the collecting container 5 of the first sorting zone 3.
- the collecting container 6 of the further sorting zone 4 below the overflow 7 have an additional sequence, which is guided in the collecting container 5 of the first sorting zone 3 and / or its drain line.
- the associated suction effect on the heavy parts in the collecting container 6 is produced via the pump in the discharge line of the collecting container 5 of the first sorting zone 3 or via the lower suspension level in the collecting container 5 of the first sorting zone 3.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018110540.1A DE102018110540A1 (en) | 2018-05-03 | 2018-05-03 | wastepaper resolution |
PCT/EP2019/058020 WO2019211051A1 (en) | 2018-05-03 | 2019-03-29 | Waste paper dissolution |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3788200A1 true EP3788200A1 (en) | 2021-03-10 |
Family
ID=66001216
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19715061.8A Pending EP3788200A1 (en) | 2018-05-03 | 2019-03-29 | Waste paper dissolution |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3788200A1 (en) |
CN (1) | CN112055768B (en) |
DE (1) | DE102018110540A1 (en) |
WO (1) | WO2019211051A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3221932A1 (en) * | 1982-06-11 | 1983-12-15 | J.M. Voith Gmbh, 7920 Heidenheim | PLANT FOR RECYCLING PAPER |
EP0164428B1 (en) * | 1984-06-09 | 1988-12-07 | Hermann Finckh Maschinenfabrik GmbH & Co. | Apparatus for pulping and sorting waste paper |
DE3524037A1 (en) * | 1985-07-05 | 1987-01-15 | Wandel Gmbh & Co Chr | SORTING DEVICE, ESPECIALLY FOR SORTING FIBER MATERIAL FLOODS FOR PAPER PRODUCTION |
DE19509789A1 (en) * | 1995-03-17 | 1996-09-19 | Voith Sulzer Stoffaufbereitung | Process for the treatment of waste paper and annex to its implementation |
EP1170417A1 (en) * | 2000-07-07 | 2002-01-09 | Voith Paper Patent GmbH | Method for pulping and cleaning of waste paper containing impurities |
EP2873769B1 (en) * | 2013-11-15 | 2018-12-05 | Valmet Technologies, Inc. | Drum pulper |
DE102015204460A1 (en) * | 2015-03-12 | 2016-09-15 | Voith Patent Gmbh | wastepaper resolution |
CN106012679B (en) * | 2016-06-15 | 2018-12-18 | 浙江凯丰新材料股份有限公司 | A kind of preparation method and its material-stirring device of self-adhering-type medico paper |
-
2018
- 2018-05-03 DE DE102018110540.1A patent/DE102018110540A1/en active Pending
-
2019
- 2019-03-29 EP EP19715061.8A patent/EP3788200A1/en active Pending
- 2019-03-29 WO PCT/EP2019/058020 patent/WO2019211051A1/en active Application Filing
- 2019-03-29 CN CN201980029525.9A patent/CN112055768B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN112055768B (en) | 2022-12-23 |
DE102018110540A1 (en) | 2019-11-07 |
CN112055768A (en) | 2020-12-08 |
WO2019211051A1 (en) | 2019-11-07 |
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Legal Events
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