EP1183419B1 - Verfahren und vorrichtung zur herstellung von faserstoff aus altpapier - Google Patents

Verfahren und vorrichtung zur herstellung von faserstoff aus altpapier Download PDF

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Publication number
EP1183419B1
EP1183419B1 EP00935750A EP00935750A EP1183419B1 EP 1183419 B1 EP1183419 B1 EP 1183419B1 EP 00935750 A EP00935750 A EP 00935750A EP 00935750 A EP00935750 A EP 00935750A EP 1183419 B1 EP1183419 B1 EP 1183419B1
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EP
European Patent Office
Prior art keywords
drilled plate
periphery
filtration
chamber
pipe
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EP00935750A
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English (en)
French (fr)
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EP1183419A1 (de
Inventor
Eric Haffner
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Finidro Financiamentos Energeticos Ltda
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Finidro Financiamentos Energeticos Ltda
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
    • D21D5/20—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in apparatus with a horizontal axis

Definitions

  • the present invention relates to the field of stationery and more specifically the preparation of pulp from the recycling of waste paper in order to produce paper.
  • Contaminants can take many forms. We find, in particular, metallic particles (staples), sand and gravel, adhesive materials, pieces of plastic ...
  • mineral fillers incorporated into the paper for certain products (magazines, printing and writing papers, etc.).
  • the presence of mineral fillers may be undesirable, in particular for the production of sanitary papers. It is necessary in this case to separate them from the dough.
  • the preparation of pulp with waste paper is the overall process, ranging from the disintegration of waste paper up to the various decontamination stages, possibly the elimination of inks (deinking) and mineral fillers (washing), and which may include one or more two bleaching steps allowing the fibers to regain their initial whiteness.
  • the pulp produced will be used to feed the paper machine.
  • the classic process for preparing pulp from old paper always begins with the disintegration of the papers and the suspension of the fibers, using a pulper (Step A).
  • the pulper is an equipment equipped with a rotor (or turbine), which causes sufficiently strong agitation of the waste paper, mixed with water, so that the bonds between the fibers (hydrogen bonds) break one after the other .
  • a pulp from old paper is thus reconstituted.
  • the dough preparation processes currently in use are a more or less complete combination of the steps previously described, each carried out by different equipment. Between each step, the dough is generally pumped, resulting in high energy consumption. Certain steps require the use of chemicals. It is frequent, and particularly when one wants to produce “white” papers imposing restrictive optical criteria, that the recycling process of old papers is not competitive compared to the use of virgin cellulose.
  • the object of the invention is to replace, in its basic version, several of the devices corresponding to the above-mentioned steps H, J, L, M, or even C, D, E, F, G and I, whatever the type of paper to be produced, also allowing significant savings in energy and chemicals. The recycling of waste paper will thus become more competitive, even for the most demanding applications.
  • the invention also allows a much lower footprint.
  • the invention provides a method according to claim 1 and an apparatus according to claim 2.
  • additional features of the apparatus according to the invention are presented.
  • FIGS 1 to 4 show several practical embodiments of the invention, corresponding to several applications.
  • Figures 5 and 6 show specific details and parts of the invention.
  • FIG. 1 represents a section of a practical embodiment of the invention applied more particularly to sanitary papers (known as “tissue”) in its basic configuration having, in addition to the basic functions, a device for recovering the fibers having passed through through the grid (6) and their recovery by the tube (14) in the center of the device, a two-stage clarification device, and a device for reintegrating the recovered elements (13).
  • tissue sanitary papers
  • FIG. 1 represents a section of a practical embodiment of the invention applied more particularly to sanitary papers (known as “tissue”) in its basic configuration having, in addition to the basic functions, a device for recovering the fibers having passed through through the grid (6) and their recovery by the tube (14) in the center of the device, a two-stage clarification device, and a device for reintegrating the recovered elements (13).
  • FIG. 2 represents a section of a practical embodiment of the invention applied more particularly to sanitary papers having, in addition to the basic functions: a preliminary treatment of the paste by elimination of fine sands and other “heavy” or “light” contaminants In the sedimentation chamber (25) and a slotted filing; a device for recovering fibers having passed through the grid (6) and their concentration in the chamber (33); a device for reintegrating the recovered elements (13).
  • FIG. 3 represents a section of a practical embodiment of the invention applied more particularly to printing, writing and magazine newspapers, having, in addition to the basic functions: a preliminary treatment of the pulp by elimination of fine sands and other contaminants " heavy ”or“ light ”in the sedimentation chamber (25) and a slotted classification; a preclarification device in the chamber (33); a device for reintegrating the recovered elements (13).
  • FIG. 4 represents a section of a practical embodiment of the invention more particularly applied to cardboard papers and packaging papers, having, in addition to the basic functions: a preliminary treatment of the pulp by elimination of fine sands and other contaminants "Heavy” or "light” in the sedimentation chamber (25) and a slotted classification; a preclarification device in the chamber (33) .; a device for reintegrating elements extracted during clarification with dough by deflectors (39).
  • FIG. 5 represents a section of the orifices of the classification grid with hole / slots.
  • Figure 6 corresponds to the braking device of the fibers extracted at the periphery (8) by spiral tubes.
  • the invention For sanitary papers, known as “tissue”, the invention consists, in its basic version, in grouping together the functions of washing, deinking, removing particles of density less than 1, thickening the fibers, d thickening of the suspended matter from the filtrates, clarification of the water and elimination of contaminants of density less than 1.
  • the invention therefore replaces the apparatus corresponding to steps F, H, I, J, L, M of the conventional process for preparing paper pulp.
  • Figures 1 and 2 show, in particular, two practical embodiments of the invention applied to this quality of paper.
  • the present invention consists in grouping, in its basic version, the functions of deinking, fiber thickening, water clarification, and elimination of contaminants with a density less than 1.
  • the invention combines steps F, H, J, L, M and possibly I of the conventional process for preparing paper pulp.
  • FIG. 3 represents, in particular, a practical embodiment of the invention for this application.
  • the present invention consists in combine, in its basic version, the functions of fiber thickening, water clarification, elimination of contaminants with a density less than 1, and possibly long fiber / short fiber fractionation.
  • the invention replaces steps H, J, L, M of the conventional process for preparing paper pulp.
  • Figure 4 is a practical representation of the invention for this application.
  • the invention replaces steps C to E and G of the conventional process for preparing paper pulp.
  • the proposed device consists of a body (1) rotating at high speed integrally driving all of the internal components of the device.
  • the body of the device is driven by a motor not shown in the figures.
  • Step A Beforehand the old paper must be disintegrated via a pulper (Step A), and undergo a coarse decontamination (Step B). In its basic version ( Figure 1) the dough must still undergo Steps C, D and E of the conventional process before introduction into the device.
  • the dough thus previously treated and free of the most important contaminants is introduced along the axis of the device, through a central duct (2).
  • the fins (3) allow the dough to be rotated at the same angular speed as the device. All the incoming and outgoing conduits (2), (12), (13), (14), (21), (22) and (37) are connected to mechanical seals, not shown in the figures, allowing d '' ensure a tight connection with fixed conduits.
  • the speed of rotation of the device is such that at its periphery the bodies are subjected to an artificial gravity field which can exceed 1000 times the Earth's gravity.
  • the dough has already undergone steps A to E of the conventional process and contains only small contaminants (generally less than 0.5 mm in diameter).
  • the paste to be treated is conveyed (4) along a grid with small holes (6), the majority of the water passing through the grid while the fibers are retained because of the small diameter of the holes.
  • the fibers are entrained, due to a density greater than 1, and under the effect of the artificial gravity field linked to the rotation of the device, towards the periphery of the device and end up in the dough concentration chamber (7).
  • the extraction taking place at high speed the braking of the dough can be ensured by circular tubes (44) arranged in a spiral pattern (FIG. 6).
  • the dough extracted around the device joins the deceleration rings whose dimensions are determined according to the maximum acceptable speed.
  • the filtrates and the water, having passed through the holes in the grid (6), are intended for different treatments depending on the applications.
  • one of the objectives of the invention is to recover the fibers and fines (fragments of fibers) which have passed through the grid (6). It also involves eliminating inks and mineral fillers from the water in order to reuse it in order to close the water circuits as much as possible and reduce the consumption of fresh water. Unclarified water is first treated immediately after passing through the grid. This involves recovering the fibers, which are also among the heaviest and largest elements of the filtrates in question.
  • the first solution represented in FIG. 1, consists in bringing back the cellulosic elements to be recovered towards the axis of the apparatus. Unclarified water is routed through line (9). The suction speed of the pipe (9) towards the feed zone (15) of the clarification zone (16) is not sufficient to entrain the fibers and the other heavier bodies, which thus sediment at the periphery of zone (5). These bodies are recovered by a pipe (10) which routes them towards the axis of the device. The section of this pipe is studied so as to allow a speed of the current greater than the speed of sedimentation of the fibers.
  • an opening (11) which communicates with the concentration chamber (19) of the solid elements separated from the waters to be clarified makes it possible to avoid the formation of deposits.
  • This opening may be crossed by a counter current of water supplied by a pipe (12). The flow of this water would be adapted so that the speed of the current which passes through the opening is greater than the speed of sedimentation of the fibers, while the denser elements, which manage to go up the current taking into account their higher sedimentation rate, are collected in the concentration chamber (19) before being extracted by the nozzles (20).
  • the recovered fibers, routed through the pipes (10) and extracted through the center of the apparatus by the tube (14), are optionally treated by conventional deinking means before being reintegrated into the pulp in the apparatus.
  • the second solution for separating the fibers to treat them and then recover them consists in extracting them from the periphery of the device.
  • Figure 2 shows a representation of this configuration. This involves including a sedimentation zone (33) at the periphery of the zone (9) and downstream of the grid (6) where the fibrous elements which have sedimented are concentrated under the effect of the artificial gravity field caused by the rapid rotation of the device. These elements can then be evacuated through the periphery of the device by the nozzles (34). The waters to be clarified pass directly from the zone (33) to the clarification zone (16).
  • the fibers extracted by one of the two means envisaged are previously treated, if necessary, and can be reintegrated in the device.
  • This reintegration is carried out by a pipe (13) and allowing the routing of the fibers and other elements to be integrated at the periphery of the apparatus at the points of introduction (13b) in the area (4).
  • This location on the periphery, close to the pulp concentration zone (7), makes it possible to limit the losses of fibers and other reintegrated elements, the only desired function being the thickening of the pulp and reintegrated elements.
  • the filtration grid (6) may, for diameters greater than the reintroduction point (13b), have smaller holes in order to limit the passage through the grid of the reintegrated elements.
  • the grid (6) will also have a fractionation function, that is to say classification between long fibers and fibers short, the long fibers being retained by the grid while the short fibers pass through.
  • the size of the holes will be studied as a function of the desired fractionation effect.
  • the water and the elements having passed through the grid (6) will be collected in the chamber (9) and led to the clarification zone (16) consists of cones close to each other, which may be in plastic or composite material with a density close to 1.
  • the water to be treated, framed by the separation cones, is directed from the periphery towards the axis of the device.
  • the particles, of different density of water, under the effect of the artificial gravity field, have a radial speed different from water and meet the area of the nearest separation cone. Due to the friction between the water and the cones, the speed of the water in the immediate vicinity of the cones is very low, which will facilitate the migration of particles along the conical surfaces.
  • the particles captured by the cones will have a higher migration speed than the speed of the water in the immediate vicinity of the cones. Once they have reached a cone, the particles of density greater than 1 thus progressively rise along the surface of the cone. The water passes to the center of the device where it is discharged through the tube (21).
  • each cone may be extended by evacuation channels (17) which allow the solids captured by the cones to continue their way towards the periphery in the middle of the stream of unclarified water at the inlet clarification.
  • evacuation channels (17) which allow the solids captured by the cones to continue their way towards the periphery in the middle of the stream of unclarified water at the inlet clarification.
  • These channels shown in FIG. 2, communicate themselves with the solids evacuation pipe (18), before joining the concentration chamber (19) and being expelled from the device by the nozzles (20) .
  • These nozzles (20) have a permanent or sequential opening depending on the case and the applications.
  • the invention may be provided with a clarification in 2 time, when the water passes successively through a preclarification zone (33) and then into a final clarification zone (16), the two zones operating in series.
  • Figures 2, 3 and 4 show this application.
  • the preclarification zone (33) is intended to eliminate the most important particles, which in their movement are liable to create micro-turbulences which disturb the sedimentation of the finest particles.
  • the final clarification zone (16) with very close separation plates, allows sedimentation of the finest elements according to the principle already presented. Items that are separated during the pre-clarification by sedimentation in the chamber (33) are led to the periphery of the device where they are evacuated to the periphery of the device.
  • the invention will allow all or part of the elements which have been separated during clarification to be reintegrated directly into the dough.
  • Figure 4 illustrates such an application.
  • Inclined deflectors (39) make it possible to divert a part of the elements which have sedimented in the sedimentation chamber (33) towards the pulp concentration chamber (7).
  • the opening of these deflectors (39) can be fixed or adjustable in order to allow mixing in desired proportions between the fibers and the reintegrated elements, in particular the fillers.
  • a more complete version of the invention will include the function described by step G, that is to say the elimination of fine sands as well as numerous contaminants.
  • the dough is introduced into a chamber (25). Contaminants with a density less than 1 are attracted towards the axis of the device and discharged through the orifices (22b) connected to the tube (22).
  • the conduit (27) is provided with orifices allowing the separation then the extraction of the contaminants of density greater than 1 which have a speed sedimentation higher than that of fibers. These elements sediment and are separated by the orifices (30) and extracted from the device by the nozzles (38).
  • the conduit (27) will have a suitable inclination and section to avoid the sedimentation of the fibers and the passage of the latter in the orifices (30). To increase the horizontal speed of the fibers and limit the risk of sedimentation, the conduit (27) will be supplied with water extracted in the central part of the chamber (25).
  • a more complete version of the invention consists in adding a classification with slots and / or holes. It is then a question of carrying out steps B to E of the conventional process.
  • This classification is carried out by a grid will preferably be conical (23).
  • the grid (23) will be upstream of the grid (6) ( Figures 2, 3 and 4).
  • the dough is introduced by the axis of the device around the grid (23) according to the same principle as the filtration grid (6).
  • the fibers pass through the slits (or holes), given their small diameter, while certain contaminants are retained.
  • the water having passed through the slits (23), carrying with it the fibers in suspension, is conveyed towards the axis of the apparatus through a conduit (24) towards the zone (4), the cross section of which is studied so to impose a sufficient speed on the fluid to prevent too rapid sedimentation of the fibers towards the periphery of the device.
  • an opening at the most peripheral part of the duct (24) will allow the evacuation of the heaviest elements by sedimentation.
  • This opening may be crossed by a counter current of clear water, the flow rate of which would be adjusted so that the speed of this counter current is greater than the sedimentation rate of the longest fibers and less than that of the contaminants to be separated.
  • the slit grid has the drawback of constituting a limit on the capacity of the device.
  • the open area of the grid can be very small and prevent the flow of flow authorized by all the other functions.
  • the peripheral arrangement of these openings makes it possible to limit the entrainment of fibers, since these have already passed through slots (23). Contaminants at the opening have a density greater than 1. The objective is that these contaminants are not entrained. before the water diverted through the openings (29).
  • the openings will be arranged slightly behind the path traveled by the contaminants on the one hand, and will have a funnel shape allowing possible contaminants near the opening (29) to settle towards the periphery without be driven by the openings (29).
  • the diverted water will then be routed directly to the clarification area. Any contaminant having nevertheless used these conduits will not pose any problem. It will however be possible, by adding a water separation device, not shown in the figures, to conduct the water diverted through the conduit (29) upstream of the filtration grid (6) in order to improve the washing effect.
  • the classification grids (23) will have a suitable shape, in order to improve their efficiency.
  • the conical shape of the grid with slits or holes makes it possible to facilitate contact with the fibers and their passage through the grid.
  • the angle of the cone will be studied in order to facilitate the passage of the fibers.
  • this conical shape also has the consequence of concentrating the contaminants of density greater than 1 on the grid.
  • the grid is provided, for most applications using relatively contaminated materials, with "stepped" angle breaks (28).
  • Figures 2, 3 and 4 show such a grid (23) with the stairs (28).
  • the angle break makes it possible to remove the contaminants from the grid so that they gain speed before meeting the grid again. This device will therefore facilitate their sedimentation towards the periphery of the grid. This angle break will also facilitate the passage of the fibers by regularly breaking the fiber mat which forms on the surface of the grid.
  • the orifices have a radial direction.
  • the inlet of the orifices is conical (40), the cones of the adjacent orifices will meet, so that there is no flat surface between two cones.
  • the objective is to concentrate the fibers at the entrance of the orifices, and to orient them parallel to the orifices, the average length of the fibers being much greater than the width of the orifices.
  • the section of the orifices increases (42) in order to prevent them from clogging.
  • Figure 5 shows schematically two holes in profile showing these different arrangements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Centrifugal Separators (AREA)

Claims (22)

  1. Verfahren zur Aufbereitung von Faserstoff aus vorher in einem Stofflöser aufgelöstem und in Suspension gebrachtem Altpapier durch Nutzung des Unterschieds in der Sedimentiergeschwindigkeit der verschiedenen in der Suspension enthaltenen Partikel unter der Einwirkung eines künstlichen, durch Rotation in Kombination mit einem Filterverfahren geschaffenen Schwerkraftfelds, wobei das Verfahren mit einem Filtrationsvorgang kombiniert ist, wobei das Verfahren die kombinierte und gleichzeitige Durchführung in einer einzigen rotationssymmetrischen Vorrichtung und folgende Schritte umfasst:
    a) Filterung der Suspension durch eine Lochplatte (6), welche zumindest einen Teil der in der Suspension enthaltenen Fasern zurückhält und den größten Teil des Wassers sowie in der Suspension enthaltene kleinere Verunreinigungen und Mineralstoffbelastungen durchströmen lässt, wobei dieser Filtervorgang durch die Kraft unterstützt wird, die durch die Drehbewegung in der rotationssymmetrischen Vorrichtung erzeugt wird;
    b) Konzentration und Absaugen des Teils der von der Lochplatte (6) durch Einwirkung der sich aus der Rotation der Vorrichtung ergebenden Beschleunigung an der Peripherie der Vorrichtung zurückgehaltenen Suspension.
    c) Klärung des durch die Lochplatte (6) strömenden Wassers durch Abscheidung solcher in der Suspension vorhandene Feststoffe, die eine höhere Dichte als 1 aufweisen und durch Einwirkung der sich aus der Rotation in der Vorrichtung ergebenden Beschleunigung an der Peripherie der Vorrichtung sedimentieren; sowie Konzentration und Extraktion von aus solchen dem durch die Lochplatte (6) strömendem Wasser ausgeschiedenen Feststoffen, die eine Dichte höher als 1 aufweisen.
  2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 zur Aufbereitung von Faserstoff aus vorher in einem Stofflöser aufgelöstem und in Suspension gebrachtem Altpapier , wobei genannte Vorrichtung aus einem sich mit hoher Geschwindigkeit drehenden Gehäuse (1) besteht, welches alle in seinem Innern angeordneten Komponenten antreibt, und wobei das Gehäuse (1) besteht aus:
    a) einem Einlassrohr (2) für die fasrige Suspension, welches in der Mitte des Gehäuses (1) angeordnet ist, wobei die fasrige Suspension durch mit dem Gehäuse (1) verbundene Flügel (3) mit der Winkelgeschwindigkeit des Gehäuses angetrieben wird;
    b) einer Eingabezone (4) einer gebohrten Filtrationsplatte (6) in welche die fasrige Suspension in das Gehäuse (1) der Vorrichtung gefördert wird, wobei die gebohrte Platte (6) mit kleinen Löchern versehen ist, welche ein Zurückhalten von zumindest einem Teil der in der Suspension vorhandenen Fasern gestattet, während der größte Teil des Wassers, kleinere Verunreinigungen und Mineralstoffbelastungen in der Suspension durch die gebohrte Platte (6) strömen;
    c) einer am Umkreis der Eingabezone (4) der gebohrten Platte (6) angeordneten Zone (7) für die Konzentration des von der gebohrten Platte (6) zurückgehaltenen Teils der Suspension;
    d) mehreren am Umkreis des Gehäuses (1) angeordneten Öffnungen (8) zum Abziehen der konzentrierten Suspension aus der Konzentrationszone (7); und
    e) einer Klärkammer (16) zur Klärung des durch die gebohrte Platte (6) geströmten Wassers, einschließlich am Umkreis des Vorrichtungsgehäuses (1) angeordneter Öffnungen (20) für ein Abziehen der am Umkreis der genannten Kammer (16) sedimentierten Feststoffe sowie einem Mittelrohr (21) für das Abziehen des geklärten Wassers.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Vorrichtung auch ein oder mehrere schneckenförmig an der Außenseite des Gehäuses (1) angeordnete Rohre (44) umfasst, deren Einlässe zu den Öffnungen (8) für das Abziehen der von der gebohrten Filtrationsplatte (6) zurückgehaltenen konzentrierten Suspension gerichtet angeordnet sind.
  4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Vorrichtung auch ein Mittelrohr (22) aufweist, das zum Auffangen und Abziehen der in der fasrigen Suspension vorhandenen und von der gebohrten Filtrationsplatte (6) zurückgehaltenen Feststoffe vorgesehen ist, welche zur Mitte der Vorrichtung hin migrieren.
  5. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Klärkammer (16) Separationskegel aufweist, welche die Abscheidung und Migration der in dem zu klärenden Wasser vorhandenen Feststoffe erleichtern.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Separationskegel der Klärkammer (16) in ihrem peripheren Teil durch Kanäle (17) verlängert sind, die zum Abziehen abgeschiedener Partikel von einer Dichte höher als 1 vorgesehen sind, wobei diese Kanäle mit einem in eine Konzentrationskammer (19) am Umkreis der Klärkammer (16) mündenden Rohr (18) in Verbindung stehen.
  7. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Separationskegel der Klärkammer (16) in Richtung der Längsachse der Vorrichtung durch Kanäle (36) verlängert sind, die zum Abziehen abgeschiedener Partikel von einer Dichte niedriger als 1 vorgesehen sind, wobei diese Kanäle in ein Mittelrohr (37) zum Abziehen der abgeschiedenen Partikel münden.
  8. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Gehäuse der Vorrichtung auch eine Anordnung zur Rückgewinnung von durch die gebohrte Filtrationsplatte (6) geströmten Zellulosepartikeln umfasst, wobei die Anordnung sich zusammensetzt aus:
    a) einer Sedimentierkammer (5), die in Strömungsrichtung gesehen der gebohrten Filtrationsplatte (6) unmittelbar nachgeschaltet ist und zwar am Umkreis der Platte, wo der größte Teil der schweren Verunreinigungen und Zellulosepartikel unter Einwirkung der Rotation der Vorrichtung durch die Sedimentation auf der gebohrten Filtrationsplatte (6) geströmt ist;
    b) einem Rohr (10), dessen Anschluss sich auf der Höhe der Sedimentierkammer (5) befindet und das zur Mitte des Gehäuses (1) der Vorrichtung gerichtet ist und das die dort sedimentierten Partikel und Verunreinigungen auffängt, wobei das Rohr (10) so bemessen ist, dass die Strömungsgeschwindigkeit in diesem Rohr höher ist als die Migrationsgeschwindigkeit der Zellulosepartikel zum Umkreis hin, während die schwereren Verunreinigungen am Umkreis des genannten Rohres (10) sedimentieren;
    c) einem Mittelrohr (14), welches in der Nähe der Längsachse der Vorrichtung die Strömungen aus dem im vorhergehenden Absatz genannten Rohr (10) auffängt und ein Abziehen dieser Strömungen aus dem Gehäuse (1) der Vorrichtung in dessen Längsachse gestattet.
  9. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Vorrichtung ein Einlassrohr (13) umfasst, welches ein Einbringen in die fasrige Suspension, an der Innenseite des Gehäuses (1) der Vorrichtung, von Feststoffen in den Punkten (13b), die in Strömungsrichtung gesehen vor der gebohrten Filtrationsplatte (6) liegen, und am Umkreis der Eingabezone (4) der gebohrten Platte (6) gestattet.
  10. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die gebohrte Filtrationsplatte (6) im überwiegenden Teil des Umkreisbereiches mit Öffnungen von kleinerer Abmessung versehen ist.
  11. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Klärkammer (16) in zwei in Serie funktionieren Kammern geteilt ist, welche Kammern mit Kegeln ausgerüstet und durch eine mittige, kegelige Wand (35) voneinander getrennt sind.
  12. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Gehäuse (1) der Vorrichtung eine Vorklärkammer (33) umfasst, die in Strömungsrichtung gesehen unmittelbar vor der Klärkammer (16) angeordnet ist und dem Zweck dient, gröbere Feststoffe vor der Endklärung aus dem Wasser abzuscheiden.
  13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass das Gehäuse (1) der Vorrichtung Öffnungen (34) am Umkreis der Vorklärkammer (33) aufweisen, die zum Abziehen der um Umkreis der genannten Kammer (33) sedimentierten Feststoffe aus dem Gehäuse (1) der Vorrichtung dienen.
  14. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass das Gehäuse (1) der Vorrichtung geneigte, fest oder einstellbar angeordnete Abweiser (39) aufweist, die eine Verbindung zwischen dem Umkreis der Vorklärkammer (33) und der Konzentrationskammer (7) für den Teil der Suspension gewährleisten, der von der gebohrten Filtrationsplatte (6) zurückgehalten wird.
  15. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Gehäuse (1) der Vorrichtung eine in Strömungsrichtung vor der gebohrten Filterplatte (6) angeordnete Sedimentieranordnung umfasst, die zur Abscheidung einiger in der in die Vorrichtung eingebrachten fasrigen Suspension enthaltenen Verunreinigungen von großer Abmessung dient, wobei die Anordnung gebildet wird durch:
    a) eine Sedimentierkammer (25);
    b) ein Loch (22b), das in dem näher an der Längsachse der Sedimentierkammer (25) liegenden Teil angeordnet ist und dem Zweck dient, die sich dort konzentrierenden leichten Stoffe abzuscheiden und zu dem Mittelrohr (22) zu führen und deren Beseitigung zu erlauben;
    c) ein am Umkreis der Absetzkammer (25) angeordnetes Loch (26) mit der Aufgabe, dort sedimentierte schwere Stoffe einschließlich Zellulosefasern abzuscheiden;
    d) ein Rohr (27) zur Ableitung des Teils der fasrigen Suspension, der in die Kammer (25) eingeströmt und nicht durch die Löcher (22b) und (26) zur Abscheidung leichter und schwerer Stoffe abgeschieden worden ist, in die Eingabezone (4) der gebohrten Filtrationsplatte (6) oder in eine anschließende Verfahrensstufe, wenn eine ergänzende Vorrichtung zwischen der Sedimentieranordnung und der Eingabezone der gebohrten Filtrationsplatte angeordnet ist, wobei das Rohr (27) im Hinblick auf die Neigung und die Querschnittsfläche so abgestimmt ist, dass die Zelluloseteilchen auf solche Weise von der Strömung angetrieben werden, dass dort keine Sedimentierung stattfindet;
    e) ein Rohr zur Verbindung des Lochs (26) zur Abscheidung schwerer Stoffe mit dem im vorhergehenden Absatz genannten Rohr;
    f) ein Loch (30) zur Beseitigung schwerer Feststoffe im peripheren Teil des in Absatz d) genannten Rohres (27) mit dem Zweck, schwerere Verunreinigungen, die am Umkreis des genannten Rohres (27) sedimentieren, aufzufangen und abzuscheiden; sowie
    g) ein Rohr, das die im Loch (30) aufgefangenen Feststoffe zwecks Beseitigung der in Absatz f) genannten schweren Stoffe zu den am Umkreis des Gehäuses (1) angeordneten Öffnungen (38) leitet, damit die Feststoffe durch das genannte Loch (30) abgezogen werden können.
  16. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Gehäuse (1) der Vorrichtung in Strömungsrichtung gesehen vor der gebohrten Filtrationsplatte (6) eine Klassifizieranordnung aufweist, die einer Abscheidung von Verunreinigungen, deren Größe die der Zellulosefasern übersteigt, abzuscheiden, wobei diese Anordnung gebildet wird durch:
    a) eine gebohrte Klassifizierplatte (23) mit einer kugelig geformten Fläche und versehen mit kalibrierten Schlitzen oder Löchern solcher Ausführung, dass der größte Teil der Zellulosefasern durch die Schlitze und/oder Löcher strömt;
    b) Öffnungen (38), die am Umkreis des Gehäuses (1) der Vorrichtung und in Strömungsrichtung gesehen vor der gebohrten Klassifizierplatte (23) angeordnet sind und ein Abziehen solcher Stoffe gestatten, die nicht durch die Schlitze und/oder Löcher strömen und die zur Längsachse der Vorrichtung migrieren; und
    c) ein Rohr (24), das das Wasser sowie die Stoffe, die durch die gebohrte Klassifizierplatte (23) geströmt sind, der Eingabezone (4) der gebohrten Filtrationsplatte (6) zuleiten.
  17. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass das Gehäuse (1) der Vorrichtung in Strömungsrichtung gesehen vor der gebohrten Klassifizierplatte (23) eine Anordnung zur Ableitung eines Teils des Wassers aufweist, wobei diese Anordnung gebildet wird durch:
    a) einen Wassereinlass (29) von kegeliger Form und rechtwinklig zu den Bewegungsbahnen der Partikel verlaufend, angeordnet am Umkreis und in Strömungsrichtung gesehen vor der gebohrten Klassifizierplatte (23); und
    b) ein Rohr, welches den im vorhergehenden Absatz genannten Wassereinlass mit der Klärkammer der Eingabezone (4) der gebohrten Filtrationsplatte (6) anwendungsbezogen verbindet.
  18. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass die gebohrte Klassifizierplatte (23) kegelig geformt ist und eine oder mehrer Neigungen (28) aufweist, die eine Anlagerung von Feststoffen entlang der gebohrten Klassifizierplatte (23) verhindern.
  19. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass die Löcher (40) der gebohrten Klassifizierplatte (23) radial gerichtet sind und einen trichterförmigen Einlass aufweisen, wobei die trichterförmigen Einlässe von zwei nebeneinanderliegenden Löchern auf der in Strömungsrichtung gesehen vor der gebohrten Platte liegenden Seite ineinander übergehen, womit jegliche ebene Fläche zwischen zwei Löchern vermieden wird, was dem Zweck dient, die Ausrichtung und Durchströmung der Fasern zu erleichtern.
  20. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass die Löcher (40) der gebohrten Klassifizierplatte (23) aus einem einlasseitigen Trichter und einem auslasseitigen Trichter gebildet werden, um die Durchströmung der Fasern zu erleichtern und die Gefahr eines Verstopfens auszuschalten.
  21. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Löcher der gebohrten Filtrationsplatte (6) so kalibriert sind, dass sie den Durchgang eines wesentlichen Teils der kurzen Zellulosefasern durchlassen und die Mehrzahl der langen Zellulosefasern zurückhalten, wodurch eine Fraktionierung von kurzen und langen Fasern erhalten wird.
  22. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Vorrichtung ein Mittelrohr umfasst, welches dem Zweck dient, in Höhe mit der Klärkammer einige nicht eingedickte Abflüsse wie Schäume von einer Deinkingzelle direkt in das Innere des Gehäuses (1) der Vorrichtung zu leiten.
EP00935750A 1999-06-09 2000-06-08 Verfahren und vorrichtung zur herstellung von faserstoff aus altpapier Expired - Lifetime EP1183419B1 (de)

Applications Claiming Priority (3)

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PT10232099 1999-06-09
PT102320A PT102320A (pt) 1999-06-09 1999-06-09 Processo e aparelho para a preparacao de pasta de papel a partir de aparas de papel
PCT/PT2000/000006 WO2000075422A1 (fr) 1999-06-09 2000-06-08 Procede et appareil pour la preparation de pate a papier a partir de vieux papiers

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EP1183419B1 true EP1183419B1 (de) 2004-03-31

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AT (1) ATE263270T1 (de)
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CA (1) CA2376795C (de)
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ES (1) ES2218164T3 (de)
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PT (2) PT102320A (de)
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FI109135B (fi) * 1999-09-21 2002-05-31 Metso Paper Inc Menetelmä ja laite puukuitumassan käsittelemiseksi
AU2002313931A1 (en) * 2002-07-30 2004-02-16 Finidro - Financiamentos Energeticos Lda. Installation for purifying papermaking pulp
JP5098001B2 (ja) 2005-07-20 2012-12-12 株式会社シード 古紙処理装置
CN100435890C (zh) 2007-07-10 2008-11-26 陕西坚瑞化工有限责任公司 适用于精密电器设备的气溶胶灭火组合物
DE102011120630A1 (de) * 2011-12-09 2013-06-13 Aerocycle Gmbh Verfahren zur Altpapieraufbereitung
CN103191013B (zh) * 2012-01-09 2015-04-01 金卫医疗科技(上海)有限公司 血浆连续分离中具有红细胞屏障功能的曲面体容器
CN107558285B (zh) * 2016-08-23 2020-10-09 绍兴冉奕无纺布有限公司 一种废旧书本处理工艺
CN113481745B (zh) * 2021-08-04 2022-09-16 迁安市正昊纸业有限公司 一种环保型造纸工艺

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DE2924794C2 (de) 1979-06-20 1980-11-13 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zur Entwässerung einer Faserstoffsuspension
FR2478489B1 (fr) * 1980-03-21 1985-08-30 Centre Tech Ind Papier Procede et dispositif pour la separation de particules dans un fluide, notamment pour l'epuration de suspensions papetieres
US4533468A (en) * 1982-12-06 1985-08-06 The Broken Hill Proprietary Company Limited Centrifugal separation method and apparatus
FR2636251B1 (fr) * 1988-09-13 1992-01-17 Lamort E Dispositif pour la separation de particules dans un liquide, notamment pour l'epuration de suspensions papetieres
DE4105903C2 (de) * 1991-02-26 1994-10-06 Escher Wyss Gmbh Vollmantelzentrifuge als Reiniger für Stoffsuspensionen

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CN1131908C (zh) 2003-12-24
EP1183419A1 (de) 2002-03-06
KR20020047044A (ko) 2002-06-21
RU2218458C2 (ru) 2003-12-10
MXPA01012690A (es) 2003-09-04
CA2376795A1 (fr) 2000-12-14
DE60009485D1 (de) 2004-05-06
AU5116500A (en) 2000-12-28
CN1354812A (zh) 2002-06-19
BR0011686A (pt) 2002-03-05
KR100495098B1 (ko) 2005-06-14
JP2003501563A (ja) 2003-01-14
JP3787306B2 (ja) 2006-06-21
ES2218164T3 (es) 2004-11-16
US6811655B1 (en) 2004-11-02
BR0011686B1 (pt) 2010-07-27
PT102320A (pt) 2000-12-29
PT1183419E (pt) 2004-08-31
WO2000075422A1 (fr) 2000-12-14
DE60009485T2 (de) 2005-03-24
CA2376795C (fr) 2008-04-08
ATE263270T1 (de) 2004-04-15

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