DE3536337C1 - Process and device for stock preparation for ash-containing raw material in waste paper processing - Google Patents
Process and device for stock preparation for ash-containing raw material in waste paper processingInfo
- Publication number
- DE3536337C1 DE3536337C1 DE19853536337 DE3536337A DE3536337C1 DE 3536337 C1 DE3536337 C1 DE 3536337C1 DE 19853536337 DE19853536337 DE 19853536337 DE 3536337 A DE3536337 A DE 3536337A DE 3536337 C1 DE3536337 C1 DE 3536337C1
- Authority
- DE
- Germany
- Prior art keywords
- ash
- waste paper
- content
- paper processing
- line
- 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
- 238000000034 method Methods 0.000 title claims description 11
- 239000010893 paper waste Substances 0.000 title claims description 4
- 238000002360 preparation method Methods 0.000 title claims description 4
- 238000012545 processing Methods 0.000 title claims description 3
- 239000002994 raw material Substances 0.000 title 1
- 239000000725 suspension Substances 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 4
- 238000004380 ashing Methods 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 238000005188 flotation Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 230000002301 combined effect Effects 0.000 claims 1
- 238000012958 reprocessing Methods 0.000 claims 1
- 238000007873 sieving Methods 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up 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
Landscapes
- Paper (AREA)
- Processing Of Solid Wastes (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Description
Die Erfindung betrifft ein Verfahren entsprechend dem Oberbegriff des Patentanspruchs 1 und Einrichtungen zur Durchführung des Ver fahrens.The invention relates to a method according to the preamble of claim 1 and facilities for performing the Ver driving.
Es besteht in Stoffaufbereitungssystemen vielfach die Aufgabe, den Stoff, d. h. die Stoffsuspension, z. B. Altpapiersuspension, auf einen genauen Aschegehalt zu entaschen, um ein Endprodukt, z. B. Papier oder Tissue, mit genauem Aschegehalt herzustellen.There is often the task in stock preparation systems Fabric, d. H. the stock suspension, e.g. B. waste paper suspension, on a to ash the exact ash content to produce a final product, e.g. B. paper or tissue, with precise ash content.
Es sind nun verschiedene Entaschungseinrichtungen bekannt, wobei die gemäß DE-A 30 05 681 eine entsprechende Produktionsleistung ermög licht.Various ash removal devices are now known, the according to DE-A 30 05 681 enables a corresponding production output light.
Solche Entaschungsapparaturen können mit regelbarem Antrieb zur Ein stellung der Geschwindigkeit des Siebbandes betrieben werden. Dies dient hauptsächlich dazu, die Produktionsrate dem geforderten Wert bei zudem noch möglicherweise variabler Einlaufkonsistenz anzupas sen. Eine Regulierung dieser Apparate zwecks Einhaltung eines ge nauen Aschegehalts ist in großen Bereichen (z. B. zwischen 3 und 10% Aschegehalt) nur schwer zu verwirklichen.Such deashing devices can be controlled with an adjustable drive position of the speed of the belt to be operated. This mainly serves to increase the production rate to the required value to adjust with possibly also variable inlet consistency sen. Regulation of these devices for compliance with a ge exact ash content is in large ranges (e.g. between 3 and 10% Ash content) difficult to achieve.
Die Aufgabe der Erfindung ist es nun, ein Verfahren und Anordnungen anzugeben, die es ermöglichen, ohne großen Aufwand einen genauen Aschegehalt einzustellen. The object of the invention is now a method and arrangements specify that allow an accurate Adjust the ash content.
Diese Aufgabe wird bei einem Verfahren der eingangs angegebenen Art durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.This task is carried out in a method of the type specified at the outset by the features of the characterizing part of patent claim 1 solved.
Es ist bei diesem Verfahren möglich, mit mindestens ± 10% Genauig keit den Aschegehalt einzustellen. Der entsprechende Entaschungsap parat wird dabei so ausgelegt, daß er einen möglichst geringen Aschegehalt ermöglicht. Im allgemeinen ist es nun so, daß solche Entaschungsapparaturen in einer Anlage eingesetzt sind, die eine Ausstoßrate hat, die für mehrere Papiermaschinen bemessen ist. Fällt nun eine Papiermaschine aus, so muß die Produktionsrate der Ent aschungsapparatur heruntergesetzt werden. Dies ist bei dem vorlie genden Verfahren ohne weiteres möglich, ohne daß eine Änderung im Aschegehalt eintreten wird, weil ja die Regeleinrichtung, die den Stoffstrom der die Abschlämmung zur Hauptleitung zurückführenden Rückmischleitung den rückgeführten Aschestrom entsprechend den Er fordernissen einstellt. Dies kann entweder mit Dosierpumpe oder aber mit einem Durchflußmeßgerät, das ein in der Rückmischleitung einge schaltetes Ventil steuert, erreicht werden. Insbesondere können aber ganz verschiedene Endaschegehalte eingestellt werden.It is possible with this procedure with an accuracy of at least ± 10% adjust the ash content. The corresponding ash removal ap Ready is designed so that it is as low as possible Ash content enables. In general, it is now that such Deashing devices are used in a plant, the one Has a discharge rate which is dimensioned for several paper machines. Falls now a paper machine, the production rate of Ent ash apparatus can be lowered. This is the case with the procedures possible without a change in Ash content will occur because yes the control device that the Material flow of the sludge returning to the main line Back mixing pipe the returned ash flow according to the Er needs. This can either be done with a dosing pump or with a flow meter that turned on in the backmix line switched valve controls can be reached. In particular, however completely different end ash contents can be set.
Nachfolgend wird die Erfindung anhand eines in der Zeichnung darge
stellten Ausführungsbeispieles, die einen Ausschnitt aus einer
Stoffaufbereitungsanlage zeigt, erläutert.
The invention is explained below using an exemplary embodiment shown in the drawing, which shows a section of a stock preparation system.
Das Schema fängt dort an, wo bereits eine Auflösung des Altpapiers und eine Vorsortierung, d. h. Vorreinigung erfolgt ist. Nach einer weiteren Aufbereitung in der Cleaner-Anlage 1 und der Anlage 2 mit Vertikalsichtern gelangt die Fasersuspension im allgemeinen in einen Konsistenzbereich zwischen 0,5 und 1,5% zu der Entaschungsapparatur 3. Diese wird hier vorzugsweise als Doppelsiebbandgerät ausgeführt. Dessen Arbeitsgeschwindigkeit beträgt zwischen 300 und 1000 m/min, und das verarbeitete Flächengewicht (nach Entaschung) beträgt zwi schen 20 und 100 g/m2. Somit sind dort minimale Ausgangs-Aschege halte zwischen 2,5 und 5% möglich. Diese wären jedoch nur als An haltswerte anzusehen.The scheme begins where the waste paper has already been dissolved and pre-sorted, ie pre-cleaned. After further processing in the cleaner system 1 and system 2 with vertical classifiers, the fiber suspension generally reaches the ash removal apparatus 3 in a consistency range between 0.5 and 1.5%. This is preferably designed as a twin-wire belt device. Its working speed is between 300 and 1000 m / min, and the weight per unit area (after ash removal) is between 20 and 100 g / m 2 . This means that minimum output ash levels of between 2.5 and 5% are possible. However, these should only be regarded as reference values.
Im Hauptstrom gelangt dann die Fasersuspension zu einem Banddruck filter 16, z. B. um für einen vorgesehenen Bleichvorgang eine hohe Konsistenz einzustellen. Das Aschefiltrat der Entaschungsapparatur 3 gelangt dann über Leitung 5 zu einer Sedimentationseinrichtung 4, die aber auch eine Flotationseinrichtung oder eine kombinierte Ein richtung sein kann. In dieser Einrichtung wird im wesentlichen die Asche abgeschieden, die dann mittels Pumpe 6 in Leitung 7 abgeführt wird. Es ist nun an Leitung 7 eine Rückmischleitung 14 angeschlos sen, in die ein Durchflußmeßgerät 8 und ein Drosselventil 9 einge schaltet sind. Die Durchflußrate wird über Ventil 9 mittels dem Durchflußgerät 8 und Regeleinrichtung 10 gesteuert, und zwar nach der erforderlichen Menge, um im Rückmischpunkt 20 den geforderten Aschegehalt zu erreichen. Es kann ebenfalls noch der weitere Durch fluß hinter dem Abzweigpunkt in Leitung 7 mittels Durchflußmeßgerät 12 und Drosselventil 11 sowie Steuergerät 13 eingeregelt werden. Danach gelangt das Restfiltrat vorzugsweise zu einer Schnecken zentrifuge, um Klarwasser zurückzugewinnen.In the main stream, the fiber suspension then arrives at a belt pressure filter 16 , e.g. B. to set a high consistency for an intended bleaching process. The ash filtrate from the deashing apparatus 3 then passes via line 5 to a sedimentation device 4 , which can also be a flotation device or a combined device. In this device, the ash is essentially separated, which is then discharged into line 7 by means of a pump 6 . It is now on line 7, a backmix line 14 ruled out, in which a flow meter 8 and a throttle valve 9 are switched on. The flow rate is controlled via valve 9 by means of the flow device 8 and control device 10 , specifically according to the amount required to achieve the required ash content in the remixing point 20 . It can also be the further flow behind the branch point in line 7 by means of flow meter 12 and throttle valve 11 and control unit 13 are adjusted. The residual filtrate is then preferably passed to a screw centrifuge in order to recover clear water.
Vorzugsweise ist die Anlage so aufgebaut, daß auch noch Vertikal sichter hinter der Sedimentationseinrichtung in die Klarwasserlei tung 21 eingeschaltet sind, um absolut, jedenfalls möglichst reines Klarwasser in die Geräte, die im Hauptstrang vor der Entaschungsap paratur liegen, z. B. Cleaner 1 und Vertikalsichter 2, zurückzulei ten. Auf diese Weise wird eine noch genauere Einstellung des Asche gehalts möglich, da die Eingangswerte der Entaschungsappartur 3 nicht durch rückgeführten Aschegehalt verfälscht werden.Preferably, the system is constructed so that vertical sifters are switched on behind the sedimentation device in the Klarwasserlei device 21 to absolutely, at least as pure as possible clear water in the devices that are in the main line before the Entaschungsap paratur, z. B. Cleaner 1 and vertical sifter 2 , zurückzulei th. In this way, an even more precise adjustment of the ash content is possible because the input values of the ash removal apparatus 3 are not falsified by recycled ash content.
Auf diese Weise können starke Änderungen des geforderten Aschege halts z. B. zwischen 3 und 10% bewältigt werden. Dies kann zudem unabhängig davon geschehen, welche Produktionsleistung von dem Ent aschungsapparat 3 verlangt wird. Man legt diesen für größte Ent aschungsleistung aus und reguliert mittels der dargestellten Anord nung aufgrund der nach dem Entaschungsapparat zugemischten Aschean teile den Endaschegehalt.In this way, strong changes in the required ash hold z. B. between 3 and 10%. This can also be done regardless of what production output is required from the deashing device 3 . It is designed for maximum de-ashing performance and is regulated by means of the arrangement shown based on the ash content mixed in after the de-ashing apparatus.
Ein Doppelsiebapparat für Entaschung ist z. B. bekannt aus US-PS 38 76 498.A twin sieve for ash removal is e.g. B. known from U.S. Patent No. 38 76 498.
Claims (5)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853536337 DE3536337C1 (en) | 1985-10-11 | 1985-10-11 | Process and device for stock preparation for ash-containing raw material in waste paper processing |
AT203686A AT387600B (en) | 1985-10-11 | 1986-07-29 | METHOD AND ARRANGEMENT FOR THE PREPARATION OF FABRICS IN THE ASPENDENT MATERIAL IN THE PROCESSING OF WASTE PAPER OR CELLFUME |
GB8623155A GB2181761B (en) | 1985-10-11 | 1986-09-26 | Method and apparatus for preparing stock suspension with a required ash content for paper manufacture. |
CH4055/86A CH672153A5 (en) | 1985-10-11 | 1986-10-10 | |
IT6777186A IT1195338B (en) | 1985-10-11 | 1986-10-10 | PROCEDURE AND DEVICE FOR THE TREATMENT OF MATERIAL IN THE PRESENCE OF A STARTING MATERIAL CONTAINING ASHES PARTICULARLY FOR THE TREATMENT OF WASTE PAPER OR CELLULOSE |
BE0/217285A BE905591A (en) | 1985-10-11 | 1986-10-10 | PROCESS FOR THE TREATMENT OF SUSPENSIONS, SUCH AS STATIONERY, FOR PRECISE FIXING OF ASH CONTENT. |
FR8614395A FR2591625B1 (en) | 1985-10-11 | 1986-10-10 | PROCESS FOR THE TREATMENT OF SUSPENSIONS, SUCH AS STATIONERY, FOR THE PRECISE FIXING OF ASH CONTENT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853536337 DE3536337C1 (en) | 1985-10-11 | 1985-10-11 | Process and device for stock preparation for ash-containing raw material in waste paper processing |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3536337C1 true DE3536337C1 (en) | 1987-05-27 |
Family
ID=6283384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19853536337 Expired DE3536337C1 (en) | 1985-10-11 | 1985-10-11 | Process and device for stock preparation for ash-containing raw material in waste paper processing |
Country Status (7)
Country | Link |
---|---|
AT (1) | AT387600B (en) |
BE (1) | BE905591A (en) |
CH (1) | CH672153A5 (en) |
DE (1) | DE3536337C1 (en) |
FR (1) | FR2591625B1 (en) |
GB (1) | GB2181761B (en) |
IT (1) | IT1195338B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006057861A1 (en) * | 2006-12-08 | 2008-06-12 | Voith Patent Gmbh | Method for treating a filtrate produced from a paper fiber suspension of waste paper comprises adding the filtrate partly to the paper fiber suspension at a site lying downstream of a thickening units from which the filtrate is produced |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3876497A (en) * | 1971-11-23 | 1975-04-08 | Sterling Drug Inc | Paper mill waste sludge oxidation and product recovery |
CS220858B1 (en) * | 1978-12-06 | 1983-04-29 | Marcel Lalak | Method of treating the waste paper |
-
1985
- 1985-10-11 DE DE19853536337 patent/DE3536337C1/en not_active Expired
-
1986
- 1986-07-29 AT AT203686A patent/AT387600B/en not_active IP Right Cessation
- 1986-09-26 GB GB8623155A patent/GB2181761B/en not_active Expired
- 1986-10-10 FR FR8614395A patent/FR2591625B1/en not_active Expired - Fee Related
- 1986-10-10 CH CH4055/86A patent/CH672153A5/de not_active IP Right Cessation
- 1986-10-10 BE BE0/217285A patent/BE905591A/en not_active IP Right Cessation
- 1986-10-10 IT IT6777186A patent/IT1195338B/en active
Non-Patent Citations (1)
Title |
---|
NICHTS-ERMITTELT * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006057861A1 (en) * | 2006-12-08 | 2008-06-12 | Voith Patent Gmbh | Method for treating a filtrate produced from a paper fiber suspension of waste paper comprises adding the filtrate partly to the paper fiber suspension at a site lying downstream of a thickening units from which the filtrate is produced |
Also Published As
Publication number | Publication date |
---|---|
GB8623155D0 (en) | 1986-10-29 |
GB2181761A (en) | 1987-04-29 |
FR2591625B1 (en) | 1990-06-01 |
ATA203686A (en) | 1988-07-15 |
GB2181761B (en) | 1989-09-13 |
IT1195338B (en) | 1988-10-12 |
FR2591625A1 (en) | 1987-06-19 |
BE905591A (en) | 1987-02-02 |
CH672153A5 (en) | 1989-10-31 |
IT8667771A0 (en) | 1986-10-10 |
AT387600B (en) | 1989-02-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of patent without earlier publication of application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |