• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A drum pulper (1) comprising a rotatable drum (2) comprising a dissolving part (7) for dissolving a fibrous matter contained in a pulp slurry in a drum pulper (1) and a washing part (8) for recovering fibers from the pulp Dissolving part (7) dissolved fiber material and a thickening part (6) for increasing the consistency of the fed into the Trommelpulper (1) fiber mass suspension. In addition, a pulper system (17) and a method for dissolving fiber material.
    公开号:AT511367A2
    申请号:T429/2012
    申请日:2012-04-11
    公开日:2012-11-15
    发明作者:Toni Pirinen；Hannu Saikkonen
    申请人:Metso Paper Inc；
    IPC主号:
    专利说明:

    • «1 ♦ ·
    Background of the invention
    The invention relates to the treatment of fibrous material and in particular secondary fiber material for the production of paper or paperboard as well as to a pulper system for dissolving fiber material to be used in the treatment of fibrous material.
    For reuse of secondary fiber material, such as old cardboard or mixed waste paper, the secondary fiber material is dissolved for the production of paper or board. The dissolution of secondary fiber material typically occurs in the pulper system, which includes at least one main pulper into which the fibrous material is conveyed. The fibrous material is dissolved in the main pulper and mixed with the water to be added to the main pulper to form a mixture of fibrous material and water, i.e. a pulp slurry. At the bottom of the main pulper there is a sieve plate; an acceptance passed through this screen plate, i. For the production of paper or cardboard acceptable fiber residue, is then a further processing for the
    Fiber mass suspension supplied, and the not reached through the mesh plate portion of the pulp suspension, i. a reject having larger contaminants than the size determined by the perforation size of the screen plate, mainly plastic, and surrounding or adhering to or entangled fibers, fiber nodes and unresolved fiber material, is typically further passed into at least one secondary pulper to continue treating the reject.
    As a secondary pulper, for example, a sorting and defibrating pulper is typically used, in which a sorting and dissolution of the fiber material contained in the pulp slurry is effected by means of a rotor and a screen plate. Such a secondary pulper may be positioned horizontally or alternatively in the vertical or other position and has the shape of a cylinder, a cone or a pulper with a curved wall shape in which a sheet-like or conical sieve plate may be present , on whose resolution space side a rotatable rotor is arranged. However, an instance of such a secondary pulper equipped with a rotor and a sieve plate is its rather small sorting capacity, with several secondary pulpers of the type referred to being needed in practice for the treatment of the reject in a main pulper. Another drawback of the subject with a rotor and a screen plate equipped secondary pulper is that the rotor plastic material or a plastic film comminuted into small pieces, which impairs deposition of the plastic and can cause further propagation of the plastic and thus problems in the production of paper or cardboard causes.
    In some cases, a drum pulper equipped with a rotatable drum has been used as a secondary pulper, the drum having a pulper for dissolving and further pulping the fiber material contained in the pulp slurry from the main pulper and a pulp washing part for recovering fibers from the pulp comprises dissolved fiber material. In this case, therefore, the fiber material fed from the main pulper into the drum pulper is further dissolved in the dissolving part of the drum pulper, and in the washing part of the drum pulper, the fiber material further dissolved in the dissolving part of the drum pulper is washed to deposit the recovered fibers therefrom.
    The advantage of a drum pulper is its typically high sorting capacity, but the dependence of the dissolution efficiency on the pulp density of the pulp slurry fed to the pulper is a drawback. To achieve good dissolution efficiency and resolution, the pulp density of the pulp slurry fed into the pulper should be reduced at least 8 to 10%, preferably about 15%. However, these pulp density values are too high for the dissolution of secondary fiber materials which are very difficult to dissolve, such as for old carton, for example, where the pulp density is
    For example, fiber mass suspension in the main pulper can only carry 3 to 6%. In this case, it is necessary to use as a secondary pulper of the sorting capacity weaker, above-mentioned, equipped with a rotor and a screen plate secondary pulper.
    Brief description of the invention
    The object of the invention is to provide a novel drum pulper and a pulper system and a method for the * ·
    Dissolve fiber material to create. For a drum pulper according to the invention, it is characteristic that the drum of the drum pulper comprises a thickening member for increasing the pulp density of a pulp slurry supplied to the drum pulper, the thickening member in the drum of the drum pulper being in the flow direction of the pulp slurry on the upper flow side is arranged on a dissolving part in the drum of the Trommelpulpers. It is characteristic of a pulper system according to the invention that a secondary pulper is a drum pulper comprising a rotatable drum and the drum is a dissolving portion for dissolving the fibrous material contained in the pulp slurry into the drum pulper, a washing portion for recovering the fibers from the pulp Dissolving dissolved fiber material and a Eindickteil to increase the consistency of a fed into the Trommelpulper Fasermassesuspension, wherein the Eindickteil is arranged in the drum of the Trommelpulpers towards the fiber mass suspension on the side of the upper stream with respect to the dissolving part in the drum of Trommelpulpers , For a method according to the invention for dissolving fibrous material, it is characteristic that prior to dissolving the fiber material contained in the pulp slurry, the consistency of the pulp slurry is increased by removing water from the pulp slurry in the thickening member in the drum of the drum pulper, the thickening member being in the Drum of the drum pulper in • ·· Ψ · «Cftt · * * * * * * · ·« «» «« * * ··· »·« · · * * * ·· * t «» * ···
    Direction of the flow direction of the fiber mass suspension is arranged on the side of the upper stream with respect to a dissolving part in the drum of the Trommelpulpers.
    The drum pulper comprises a rotatable drum, and the drum comprises a dissolving portion for dissolving the fibrous material fed into the pulp slurry, and a washing portion for recovering fibers from the fiber material dissolved in the dissolving portion, and a thickening portion for bringing the stock density into one Increase drum pulp supplied pulp slurry, wherein the Eindickteil is arranged in the drum of the drum pulper in the direction of the pulp slurry on the side of the upper stream with respect to the dissolving part in the drum of the Trommelpulpers. As a result of the thickening part present in the drum pulper, the drum pulper can be used as a secondary pulper, i. as a pulper performing the further processing of the reject from the main pulper for such a main pulper in which the fiber material is fiberized at a very low pulp density, for example, at a pulp density of only 3 to 6%, due to the thickening portion in the pulp pulp, the pulp consistency the fiber mass suspension reaching the dissolving part in the drum pulper can be increased to a substance density of about 8 to 18% preferred for the function of the dissolving part in the drum pulper.
    Some embodiments of the drum pulper and the pulper system as well as the method used for the dissolution of the fiber material are described in the dependent US Pat.
    Φ · φ · · ·
    Claims presented.
    Brief description of the figures
    The invention will now be described in more detail in connection with preferred embodiments with reference to the accompanying drawings, wherein
    1 shows a drum pulper schematically seen from the side,
    Fig. 2 shows a pulper system schematically seen from the side, and
    Fig. 3 shows a second pulper system seen schematically from the side.
    Detailed description of the invention
    In Fig. 1 is seen schematically from the side and very simplified a Trommelpulper 1 shown having a rotatable drum 2. In the drum pulper 1, a feed block 4 is arranged, via which a mixture of fiber pulp suspension or material and water to be dissolved is fed into the drum pulper 1. In the drum 2 of the drum pulper 1, a feed end 3 directed toward the feed block 4 is arranged, via which the pulp slurry to be fed into the drum pulper 1 passes into the interior of the drum 2. At the opposite end of the drum 2, a discharge end 5 is arranged, via which a reject residue ejected from the drum pulper 1 from FIG
    Inside the drum 2 is removed for further processing.
    The fibrous material contained in the pulp slurry 1 in the pulp slurry is dissolved. Generally, the fiber material is dissolved in the drum pulper 1 in such a manner that the drum 2, which is substantially inclined in a horizontal direction as shown in Fig. 1 or slightly inclined downward from the feed end 3 to the discharge end 5, rotates about its axis in the interior of the drum 2 supplied fiber material with the rotation of the drum 2 rises and falls in any phase to the bottom of the drum 2, and at the same time dissolves into fibers. The sizing of the drum 2 and the rotational speed is designed according to a capacity provided for the drum pulper 1 in such a way that the material supplied to the feed end 3 of the drum 2 is well defibrated on reaching the discharge end 5 of the drum 2. For the sake of clarity, no devices required to rotate the drum 2 are shown in FIG.
    To drum 2 of the drum pulper 1 of Fig. 1 in the flow direction of the pulp suspension comprises a Eindickteil 6 for thickening the fed into the Trommelpulper 1 pulp suspension or to increase the consistency, the thickening 6 following dissolving part 7 for dissolving the fiber material contained in the fiber mass suspension or the Pulp or release of the otherwise present in the pulp slurry material, and the washing part 8 for the recovery of fibers from the dissolved in the dissolving part 7 fiber material.
    The fed into the Trommelpulper 1
    Fiber mass suspension passes through the feed block 4 and the feed end 3 of the drum 2 in the thickening 6 in the drum 2. The jacket 9 on the drum 2 in the thickening 6 in the drum 2 is not closed, but in this openings 10 are present over the Liquid or, water is removed from the fed into the drum 2 pulp suspension, which increases the consistency of existing in the thickening 6 in the drum 2 pulp suspension. Below the thickening part 6 is located in the drum pulper 1, a filter tank 24 into which the water removed in the thickening 6 from the drum pulper 1 and the fibers contained therein.
    The water to be deposited in the filter tank 24 present in the thickening section 6 in the drum pulper 1 and the fiber material to be separated therefrom can be returned, for example, to a main pulper present in front of the drum pulper 1 in the same pulper system, which is shown schematically in FIGS. 2 and 3 by means of an arrow 25 is shown. Alternatively, this suspension, which mainly comprises water, can also be used in the wash part 8 to be treated below in the drum pulper 1 or, for further processing, be guided into the same process with the acceptance of the main pulp. Therefore, the size of the openings 10 is selected in the thickening 6 in such a way that as few impurities pass through the openings 10 in the filter tank 24.
    In the embodiment shown schematically in FIG. 1, the openings 10 are round, but the shape of the openings 10 can also vary in many ways. The openings 10 may thus also be gap-like openings.
    If the openings 10 in the thickening part 6 in the drum pulper 1 are round, a diameter of 5 to 25 mm can be selected for the round openings, for example, preferably 15 to 25 mm and more preferably 18 to 22 mm. The openings 10 may be either equal or different in size. The openings 10 in the thickening part 6 in the drum pulper 1 can also be formed from elongated openings. Elongated openings may be formed by making the thickening member in the drum pulper from circumferentially or axially oriented wires and these supporting support rods, or more simply by machining the gaps or openings formed on the jacket surface of the thickening member in the circumferential, axial or other direction. The width of the elongate openings or gaps may be, for example, 2 to 12 mm, preferably 3 to 8 mm. The larger the openings, the more effectively the liquid can be removed from the pulp slurry and thus the pulp density of the pulp slurry increased. However, by adequately limiting the opening size, the obstruction of large-sized contaminants interfering with the filter pool 24 can be prevented. The length of the machined elongate openings is chosen because of strength considerations pertaining to the shell, so as to ensure the structural strength of the shell. By choosing sufficiently narrow columns, the achievement of .10. unwanted rejects, such as styrofoam pieces, are prevented from passing through the openings into the filter basin.
    The pulp slurry flows from the thickening part 6 in the drum 2 in the drum pulper 1 to the dissolving part 7 in the drum 2. The thickening part 6 is in the inner flow direction of the pulp slurry in the drum pulper 1 on the side of the upper stream of the dissolving part with respect to the dissolving part 7 7 arranged immediately in front of the dissolving part 7. The shell 9 of the drum 2 is contiguous in the dissolving part 7 of the drum 2 and the drum 2 may comprise on the inside of the drum 2 on the casing 9 of the drum 2 fixed boom 11 or hoists 11. The existing on the inner surface of the drum 2 boom 11 move when turning the drum 2, the material to be pulped with the drum 2 with upward until the material to be pulped falls back to the bottom of the drum 2. When dropped, the material to be pulped dissolves or dissolves more and more with each fall through the impact effect. Part of the dissolution of the material to be pulped is also due to mutual friction of the fibers during rotation of the drum 2. With the dissolving part 7 in the drum pulper 1 is sought to complete the directed on the fiber material Pulpierungseffekt by the last fiber nodes from the fiber mass suspension existing impurities are solved.
    To move the material to be pulped on the drum 2 along from the direction of the feed end 3 further in
    Direction of the discharge end 5, the boom 11, as shown schematically in Fig. 1 rail-like and arranged in an oblique position be carried out in such a way that the arms 11 tend to rotate the drum 2, the material from the feed end 3 in the direction of the discharge end 5 move. Alternatively or additionally, the drum 2 may be slightly inclined forwardly mounted in such a way that the discharge end 5 of the drum 2 is slightly lower than the feed end 3 of the drum 2, wherein the material to be pulped in falling from the inner surface of the drum 2 in the longitudinal direction the drum 2 falls further down with respect to the drum. The drum 2 can also be slightly inclined in the opposite direction or to the rear in such a way that the feed end 3 of the drum 2 is slightly lower than the discharge end 5 of the drum 2, wherein the obliquely arranged according to Fig. 2 boom 11 and hoists 11 that However, to transport material to be treated forward than tilting the drum 2 moves this backwards. The angle of inclination of the drum 2 can thus be between -5 ° and 5 °, wherein the negative number of degrees means tilting the drum 2 backwards and the positive angle of inclination means tilting the drum 2 forwards. On the inner surface of the drum 2, in the transverse direction of the inner surface of the drum 2 circumferential annular intermediate plates 12 may be arranged to limit too fast flow of the fed into the drum 2 pulp suspension through the drum 2 therethrough.
    In the thickening part of the drum 2, the cantilevers 11 or hoists 11 can be positioned with similar arms 26 or hoists 26. The hoists 26 enhance the thickening of the pulp suspension as they fluff up the material to be treated and loosen the material from the wall of the drum 2, whereby a free water-fiber mixture can be removed from the drum 2 via the openings 10. In addition, can be achieved with the lifting gear 26, a transport effect or their effectiveness from the feed end 3 of the drum 2 to the discharge end 5 of the drum 2.
    The fiber mass suspension flows from the dissolving part 7 in the drum 2 in the drum pulper 1 on to the washing part 8 in the drum 2, in which the pulp is washed away by the reject material remaining on the inside of the drum 2. The washing part 8 can be designed, for example, as a screen cylinder. In the washing section 8, in the casing 9 of the drum 2 there are sorting holes 13 or gaps 13 through which the fibers determined in size by the size of the sorting openings 13 or column 13 and the water are accepted as fractions, i. as accept, move into the below the washing part 8 existing acceptance basin 14. The deposition of the fibers accepted in the wash section 8 from the remaining portion of the pulp slurry can be increased by, for example, supplying water in the wash section as either permanent or periodic water jets 16 with nozzles 15 to the pulp slurry. The part of the fiber material and of the other material which has come along with it, for example various impurities which do not pass through the sorting openings 13 and / or gaps 13 of the washing part 8, exit the washing part 8 the laxative 5 of the drum 2, for example, discharged as discharged from the process.
    The diameter of the shape-wise round sorting openings 13 in the washing part 8 in the drum pulper 1 can be, for example, 5 to 15 mm, preferably 6 to 12 mm. The sorting openings in the washing part can be the same size over the entire length of the washing part. The sorting openings can also be arranged in such a way that they are smaller from the feed end of the drum to the discharge end. The sorting openings may initially have, for example, a diameter of 8 to 12 mm and from there to a diameter of 7 to 11 mm and further reduce to a diameter of 6 to 10 mm. The consistency of the material coming from the dissolving part to the washing part is high at the beginning of the washing part; For this reason, it is advantageous that the diameters of the sorting openings at the beginning of the washing part are large. As the consistency of the material in the wash section decreases from the beginning of the wash section toward the end of the wash section, the diameter of the sorter openings may be reduced. The size of the sorting apertures is chosen so that they remain open, i. the blockage of which is avoided, and via which, accordingly, the flow of accepted material residue, i. of the accept material, and the flow of material belonging to the reject material is avoided. The sorting openings of the washing part can be arranged in regular rows or figures or irregularly positioned. For example, the sorting openings of the washing part can be rows in the axial direction or 14 14. "* M >"
    Form circumferential direction of the drum or rows in other directions.
    The openings of the thickening and washing part can be made in such a way that the diameter of an opening does not change in the thickness direction of the shell. The openings may also be made as double-drilled holes by drilling smaller holes on the inside of the drum and larger holes on the outside. If a larger diameter hole to be drilled from the outside is not drilled, the bore to be made from the inside of the drum will determine the smallest diameter of the hole. If the opening is made enlarging in the flow direction in this way, the permeability of the opening improves and reduces the tendency to clog compared with an opening whose diameter does not change with the wall thickness of the drum.
    The holes or openings in the thickening and washing part can be carried out in the radial direction or in an oblique position relative to the radial direction. With an oblique direction of an opening, for example, the opening may be directed more toward the rising side of the drum in the direction of movement of the material falling from the hoists, i. in the direction of gravity, wherein the permeability of the drum can be made much more effective compared to an opening or a hole which would have a radial direction. 15
    Instead of or in addition to the shape of the round round sorting openings elongated openings may be present in the washing part, which were formed by mechanical processing or wire profiles and gaps formed between them. The width of the elongate sorting openings or gaps in the washing part may be, for example, 2 to 10 mm, preferably 3 to 8 mm. A gap is chosen to be large enough to avoid clogging and so small that the impurities belonging to the reject do not pass through it. The dimension for the column is chosen according to the material to be treated.
    Also in the washing section 8 in the drum 2 in the drum pulper 1 are boom 27 and lifting equipment 27 available. The hoists 27 lift and mix the material to be treated, increasing the flow of the fibrous material to the accept. This effectiveness is in turn caused by the fact that the washing jets are directed from several directions and more uniformly on the material to be treated.
    The accepted portion of the pulp slurry in the wash compartment 8 into the acceptance basin 14, i. the acceptance of the drum pulper 1 can, for example, in the same pulper system be returned to a main pulper present in front of the drum pulper 1. Alternatively, said accept may be directed to the same further processing of the papermaking fiber suspension to which acceptance of the main pulp is directed. The acceptance of the Trommelpulpers can also before the line in ^ * kkk * k * ··· »« t - i «•« I «· Φ kkkkk * k» · k # k * · kk «kk · the same process with the Acceptance of Hauptpulpers be directed to a special treatment.
    The drum pulper 1 shown in FIG. 1 deviates from the previously known drum pulpers in that it has a thickening member 6 to be positioned in front of the dissolving member 7, and water in this thickening member 6 for increasing the pulp density of the pulp slurry from the drum pulper 2 into the drum pulper 1 fiber mass suspension to be supplied is removed. Due to the thickening member 6 present in the drum pulper 1 of Fig. 1, the drum pulper 1 can be used as a secondary pulper, i. as a further processing of the reject from the main pulper to be performed pulper for such a Hauptpulper be used in which the fiber material is shredded at a very low consistency, for example, at a consistency of 3 to 6%, wherein thanks to the Eindickteils in 6 Trommelpulper 1 the Density of the reaching into the dissolving part 7 in the drum pulper 1 fiber pulp suspension can still be increased to a preferred for the function of the dissolving part 7 in the drum pulper 1 range of 8 to 18%. The consistency of the fiber mass suspension in the washing section 8 in the drum pulper 1 drops to about 2 to 5% due to the water to be sprayed into the fiber pulp suspension.
    Some fiber material can therefore be recovered in the thickening part of the drum pulper. However, the recovery of fiber material by the drum pulper takes place primarily in the wash part, which is caused by the fact that the fiber material is only in the dissolving part in the drum pulper 16. ti ata · properly resolved from the remaining reject material and also the dissolved or liberated fiber material can be obtained in such a dispersed fiber residue or fiber parts that it is deposited through the openings of the sorting surface of the washing part in the drum pulper.
    The diameter of the drum 2 in the drum pulper 1 is preferably 2 to 6 m. The diameter of the drum 2 is generally chosen to be consistent throughout the length of the drum. The diameter of the drum can also be chosen such that it varies continuously over the length of the various parts or even constantly varies along the length of the drum. The length of the thickening part in the drum 2 is preferably 1-15 in, the length of the dissolving part is preferably 3 to 25 m and the length of the washing part is 2 to 20 m. The total length of the
    Drum 2 in the drum pulper 1 is preferably 10 to 60 m.
    The diameter of the drum and the lengths of the parts of the drum are chosen based on the material to be treated so that the pulp can be separated, dissolved and recovered by the reject pulp of the main pulper and the desired production capacity is achieved with the drum pulper , The consistency is preferably 15 to 35% of the length of the drum 2, the dissolving part 30 to 50% of the length of the drum 2 and the washing part 25 to 45% of the length of the drum second
    In Fig. 2, a pulper system 17 is shown schematically seen from the side. A pulper system according to FIG. 2 includes a main pulper 18 and a series pulper 18 in series with it
    in the main pulper 18 to be used drum pulper 1. In the main pulper 18 by mixing water and fiber material together a fiber slurry is formed. The supply of water into the main pulper 18 is shown in Fig. 2 with an arrow W and the supply of fiber material in the main pulper 18 with an arrow FM. The fiber material can be supplied to the main pulper 1, for example, as whole bales or in smaller raw material batches. In addition to water and fiber material, various chemicals are added to the main pulper.
    The main pulper 18 shown in FIG. 2 can therefore be a so-called Horinzontalpulper or Vertikalpulper having a not shown in FIG. 2, driven by a motor, positioned in the vertical direction rotor, the strong by rotating the material to be treated in the pulper set in motion. The fiber material of the material to be treated in the pulper is dissolved in the pulper to fiber suspension. Dissolution of the fiber material in the pulper is achieved by wet-out of the material and action of chemicals, rupture caused by the rotor, impact between the fiber material and the walls of the pulper, and friction generated by the mutual movement of the material. The consistency of this pulp slurry, if the material to be dissolved is secondary fiber material, such as old cardboard or mixed waste paper, may be between 1 to 10%, but typically 3 to 6%. Instead of secondary fiber material, the fibrous material to be fed into the main pulper 18 may also be 19 ejected material or cellulose returned in paper or board making.
    To a pulper system 17 of Figure 1 belongs a main pulper 18, but the pulper system may also include several main pulpers in which different secondary fiber materials may be treated, for example the following secondary paper or secondary board qualities: OP = office paper; OCC = corrugated cardboard (corrugated board); ONP = Newspapers (Newsprint); OMG = Magazines (Magazine Paper), MW = Mixed Waste, Liquid Packages; Other Fiber Materials. The function of the main pulper can be optimally optimized for the raw materials in question by, inter alia, choosing a rotor that is most suitable for the purpose and a rotational speed for the rotor, as well as processing material density, temperature and chemicals.
    As the rotor rotates on main pulper 18, major turbulence is created in main pulper 18, in which particles heavier than fibers, such as large fiber nodes and various contaminants entrained with the secondary fiber material, such as sand and plastic and metal pieces, are heavier Drift fabrics to the edges of the main pulp 18. The fiber material gradually sinks down in the middle part of the main pulper 18. In the lower part of the main pulper 18 there is a sieve plate, through the openings of which the sufficiently shredded material can pass. The openings may be round in shape and the diameter is 20 l
    typically 5 to 20 mm. Instead of the round openings or in addition to these elongated openings can be formed in the screen plate. The portion which has passed through the holes in the screen plate is referred to as the acceptance residue of the main pulp 18 and is conveyed along an accept channel 19 of the main pulp 18 to the further processing process for the pulp slurry. The further processing process for the pulp slurry may include, for example, a hole sorting and a subsequent column sorting and between or after this a pipe spinner for removing sand. If these operations occur, the pulp slurry may optionally be passed through an ink remover and / or a precipitator into a short circulation of the paper or board machine to be used in the manufacture of paper or board. The at the edges of the main pulper 18 accumulating, containing different impurities proportion of the Fasemassesuspension or the Re jekt zurückst and the main 18 can 18 on a reject block 20 in Hauptpulper 18 and the rejection channel 21 shown schematically with an arrow 21 to the secondary pulper of Pulper system 17 of FIG. 2 acting drum pulper 1 are conveyed. The fiber material contained in the residue of the main pulper 18 is dissolved and further sorted in the drum pulper 1, as shown in connection with FIG.
    In addition, in the lower part of the main pulper 18, a not shown in the figures for the sake of clarity 21st
    There may be scrap catching place in which the heaviest parts occurring in the fiber pulp suspension fall and from which they can be removed from time to time.
    The reject substance in the main pulper 18 separates or moves during pulping in the edge region of the trough bottom of the main pulp, which is caused by a force of the rotor and a centrifugal force, which is caused by the rotational movement of the pulp to be pulped by the rotor. When the reject substance has accumulated at the edge of the tub, the reject is removed via a reject reject block in the pulper. The Rejektausleitzeit is chosen in such a way that the reject material collected at the bottom of the main pulper is largely removed from the tub in the main pulper and at the same time as much material as accept remains. For example, if the secondary fiber material to be treated with the main pulper contains little or no reject, the reject may be removed at 5 minute intervals, for example. If the secondary fiber material to be treated with the main pulper contains much reject material, the time between the individual reject discharge times may be correspondingly shorter, for example 2 minutes. The time between the individual Rejektausleitzeiten is found as an ideal time interval, depending on the case and is set appropriately long as needed, this can vary, for example, between 0 and 15 minutes. The emptying phase for the reject of the main pulper is selected for the drum pulper such that the main pulper and the drum pulper in their entirety with respect to the dissolution, the recovery and the 22 · Φ Φ * Φ
    Production capacity of the fiber material ideally function. Thus, the main pulper works mainly continuously and the reject of the main pulper is temporarily or continuously removed.
    In the pulper system 17 according to FIG. 2, the main pulper 18 is positioned higher in the height direction of the pulper system 17 than the drum pulper 1, wherein a potential energy generated by the respective height difference is sufficient to convey the reject of the main pulper 18 into the drum pulper 1. In the case illustrated in FIG. 2, a reject valve 22, shown schematically in the reject channel 21 of the main body 18, is normally held closed and opened temporarily or periodically for feeding the reject of the main body 18 into the drum pulper 1. For the sake of clarity, no devices which are clear to a person skilled in the art for opening and closing the reject valve are shown in FIG.
    In the pulper system 17 according to FIG. 2, the drum pulper 1 operates in such a way that the reject valve 22 is temporarily opened, with a specific reject quantity of the main pulper 18 being supplied for processing in the drum pulper. The drum pulper may also operate continuously, for example, in such a manner that, for example, the reject valve may be constantly open a little, in between the reject valve is further opened to carry larger contaminants into the drum pulper.
    In Fig. 3, a second pulper system 17 is shown schematically as seen from the side. The pulper system 17 according to FIG. 3 otherwise corresponds to the pulper system 17 according to FIG. 2, but the main pulper 18 and the drum pulper 1 are positioned in the same direction in the height direction of the pulper system 17. Here, the reject of the main pulper 18 may be conveyed to the drum pulper 1 with a reject pump 23, which is temporarily or periodically used for feeding the reject of the main pulper 18 into the drum pulper 1. For the sake of clarity, no devices which are clear to a person skilled in the art for controlling the function of the reject pump 23 are shown in FIG.
    In the pulper system 17 according to FIG. 3, the drum pulper 1 operates in such a way that the reject pump 23 is used intermittently, wherein in each case a specific reject quantity of the main pulper 18 is fed for processing into the drum pulper. The drum pulper may also operate continuously, for example, in such a manner that the reject pump is operated at a low speed all the time and in between the reject pump is operated at a higher speed in order to convey larger contaminants into the drum pulper.
    The pulper system 17 according to FIGS. 2 and 3 thus comprises a main pulper 18 and a drum pulper 1 shown schematically in FIG. 1, which functions as a secondary pulper in the pulper system 17. Depending on the sorting capacity of the drum pulper 1, however, a single drum pulper 1 can simultaneously serve as a secondary pulper for a plurality of main pulpers 18; one or 24 of the main pulpers 18 can Are more in the height direction of the pulper system 17 on the same plane or higher than the Trommelpulper 1. The pulper system 17 of FIG. 2 or 3 is particularly suitable good for large or very large production quantities.
    In prior pulper systems having multiple serially connected secondary pulps having a relatively small capacity and having a rotor and a sieve plate and possibly a subsequent drum filter, the subject secondary pulpers and the drum filter may be replaced by a drum pulper shown in FIG 1 are replaced, as shown in Figs. 2 and 3 is shown. Thereby, the number of belonging to the pulper system individual devices can be significantly reduced. A conventional, equipped with a rotor and a sieve plate secondary pulper can not even be connected in practice, to accept from several main pulp reject material and not material from different raw materials processing main pulpers.
    When reducing the number of devices, the layout planning for the workrooms is simplified, and the total area of the space to be provided for the maintenance of devices decreases. When reducing the number of devices, the instrumentation and automation system to be used for the control of the devices and the software possibly required therefor also become simpler, with the instrumentation and automation system required for the assembly and commissioning of both the devices themselves and their control as well as for the optimization of the 25 4 · · * * * * • * * «· I · *« * # *· «* Μ« · «* · · ** ♦
    Function of the entire pulper system to be used time is reduced. When reducing the number of devices and the number of
    Process piping systems less. In addition, the tub size in the main pulper may also be made smaller when compared to the previous tub size, if part of the dissolution of the fiber material occurs in the drum pulper.
    The fiber material can be effectively separated from the plastic material in the drum pulper and the plastic material removed without reducing the piece size of the plastic skins in the reject. On the other hand, a secondary pulper equipped with a conventional rotor dissolves the plastic in such small pieces that a part of the plastic material is converted into accept, which is undesirable. The most important advantage of the processing of reject material in the drum pulper compared to the processing with other secondary pulpers is therefore that the plastic hides do not dissolve into small chips during processing, whereby the plastic material can be removed in large pieces as a reject in Trommelpulper and thereby avoided in that plastic material gets into the further processing process in papermaking, which would be a disadvantage there.
    Both in the main pulper and in the drum pulper, therefore, the disintegration or dissolution of the fiber material takes place, and thus also the defibration or defibrability of the fiber material, whereby free fibers, fiber nodes and small pieces of fiber material are formed from the fiber material.
    For example, the material processed with the pulper may largely pass through the openings in the screen surface in the pulper as accept. The degree of dissolution of the fiber material accepted by the pulper may be for example 90 to 98%. The dissolving of the remaining part of the fiber material takes place in the further processing process by means of a through-flow in a container and various mechanical
    Further processing operations. Part of the unresolved fibers may also be recycled, for example, as rejects of coarse sorting into the main pulper.
    Those skilled in the art will appreciate that the basic idea of the invention can be implemented in many ways in the development of the technique. The invention and its embodiments are thus not limited to the examples described above, but may vary within the scope of the claims.
    PatentantSprüche:
    权利要求:
    Claims (18)
    [1]
    DR. FERDINAND GIBLER DR DR. WOLFGANG POTH Austnan and European Patent and Trademark Attorneys GIBLER & POTH PATENTANWÄLTE 33670 / ab Claims 1. Drum pulper (1), the a rotatable drum (2), and the drum (2) comprises a dissolving part (7) for dissolving a fibrous material fed into the drum pulper (1) contained in a pulp slurry, and a washing part (8) for recovering fibers from the fiber fiber material dissolved in the dissolving part (7), characterized in that the drum (2) of the drum pulper (1) comprises a thickening part (6) to increase the pulp density of the pulp slurry fed into the drum pulper (1), the thickening part in the drum (2) of the drum pulper (1) in the direction of the flow direction of the pulp slurry on the side of the upper stream with respect to the dissolving part (7) in the drum (2) of the drum pulper (1).
    [2]
    2. drum pulper according to claim 1, characterized in that the thickening part (6) in the drum (2) of the drum pulper (1) in the flow direction of the pulp slurry immediately before the dissolving part 28th

    (7) in the drum (2) of the Trommelpulpers (1) is arranged.
    [3]
    3. drum pulper according to one of claims 1 or 2, characterized in that the jacket (9) of the drum (2) in the drum pulper (1) on the thickening part (6) in the drum pulper (1) openings (10), via which from the Fiber mass suspension, which was fed into the interior of the drum (2) in the drum pulper (1), water is removed in order to increase the consistency of the pulp slurry.
    [4]
    4. drum pulper according to claim 3, characterized in that the openings (10) are round in shape and whose diameter is 5 to 25 mm.
    [5]
    5. drum pulper according to one of the preceding claims, characterized in that the length of the thickening part (6) in the drum (2) in the drum pulper (1) is 15 to 35% of the total length of the drum (2).
    [6]
    6. drum pulper according to one of the preceding claims, characterized in that the drum (2) of the drum pulper (1) in the thickening part (6) comprises the thickening and / or conveying the fiber mass suspension effective lifting equipment (26).
    [7]
    A pulper system (17) comprising at least one main pulper 29 (18) and at least one secondary pulper for processing a reject of at least one main pulp (18), characterized in that the secondary pulper is a drum pulper (1) comprising a rotatable drum (2), and the drum (2) comprises a dissolving part (7) for dissolving a fiber material contained in a pulp suspension in the drum pulper (1), a washing part (8) for recovering fibers from the in the dissolving part (7). dissolved fiber material and a Eindickteil (6), in order to increase the consistency of the fed into the Trommelpulper (1) pulp suspension, wherein the Eindickteil (6) in the drum (2) of the Trommelpulpers (1) in the flow direction of the pulp suspension on the side of upper stream with respect to the dissolving part (7) in the drum (2) of the drum pulper (1) is arranged.
    [8]
    8. Pulper system according to claim 7, characterized in that the thickening part (6) in the drum (2) of the drum pulper (1) in the direction of flow of the pulp suspension just before the dissolving part (7) in the drum (2) of the drum pulper (1 ) is arranged.
    [9]
    9. Pulper system according to one of claims 7 or 8, characterized in that the main pulper (18) in the pulper system (17) in the height direction of the system higher than the Trommelpulper 30th • (1), wherein the reject is arranged in the main pulper (18) in order to move from the main pulper (18) into the drum pulper (1) by means of a potential energy generated by said height difference.
    [10]
    10. Pulper system according to claim 9, characterized in that in a the main pulper (18) and the drum pulper (1) connecting Rejektkanal (21) of the main pulper (18) a reject valve (22) is present, temporarily for conveying the reject from the Main pulper (18) in the drum pulper (1) is opened.
    [11]
    11. Pulper system according to one of claims 7 or 8, characterized in that the main pulper (18) and the drum pulper (1) in the pulper system (17) are arranged in the height direction of the system substantially at the same height to each other, wherein the reject in Hauptpulper (18) is arranged to move from the main pulper (18) into the drum pulper (1) using a reject pump (23) disposed in the reject duct (21) connecting the main pulper (18) and the drum pulper (1) ,
    [12]
    12. Pulper system according to claim 11, characterized in that in the main pulper (18) and the drum pulper (1) connecting Rejektkanal (21) of the main pulper (18) existing reject pump (23) temporarily for supplying the reject from the Hauptpulper (18 ) is inserted into the drum pulper (4) mm. (1).
    [13]
    13. A method for dissolving fiber material, wherein in the method, a fibrous mass suspension containing fiber material fed into a drum pulper (1), the fiber material contained in the pulp slurry dissolved in a dissolving part (7) in the drum pulper (1), and the fiber pulp suspension containing dissolved fiber material for Depositing fibers therefrom in a washing section (8) in the drum pulper (1), characterized in that, prior to dissolving the fiber material contained in the pulp slurry, the consistency of the pulp slurry is increased by placing in a thickening section (6) in the drum ( 2) of the drum pulper (1) water is removed from the pulp slurry, the thickening part in the drum (2) of the drum pulper (1) in the flow direction of the pulp slurry on the side of the upper stream with respect to the dissolving part (7) in the drum ( 2) of the drum pulper (1) is arranged.
    [14]
    14. The method according to claim 13, characterized in that the consistency of the pulp slurry is increased by water in the thickening (8) in the drum (2) of the drum pulper (1) is removed from the pulp slurry, wherein the thickening in the drum (2 ) of the drum pulper (1) in the flow direction of the pulp slurry immediately before the dissolving part 32 "* (7) in the drum (2) of the drum pulper (1) is arranged.
    [15]
    15. The method according to any one of claims 13 or 14, characterized in that the fiber mass suspension in the Trommelpulper (L) from the higher than the Trommelpulper (1) positioned Hauptpulper (18) is supplied, wherein the fiber mass suspension by means of a potential difference generated by said height difference from the main pulper (18) into the drum pulper (1).
    [16]
    16. The method according to claim 15, characterized in that the fiber mass suspension is temporarily fed into the Trommelpulper (1) by the reject valve (22) is temporarily opened, in the main pulper (18) and the Trommelpulper (1) connecting Rejektkanal ( 21) of the main pulp (18) is present.
    [17]
    17. The method according to any one of claims 13 or 14, characterized in that the fiber mass suspension in the Trommelpulper (1) substantially from the existing with the Trommelpulper (l) at the same height Hauptpulper (18) using a reject pump (23) is supplied which is disposed in the reject pulley (21) of the main pulser (18) interconnecting the main pulper (18) and the drum pulper (1). • *
    [18]
    18. The method according to claim 17, characterized in that the reject pump (23) is used temporarily for supplying the pulp slurry from the main pulper (18) into the drum pulper (1).

    (D ___________________
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    同族专利:
    公开号 | 公开日
    AT511367A3|2014-09-15|
    CN102747631A|2012-10-24|
    CN102747631B|2015-05-20|
    DE102012205721A1|2012-10-25|
    FI20115379A0|2011-04-19|
    AT511367B1|2015-01-15|
    FI123000B|2012-09-28|
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    DE102018003522A1|2017-11-22|2019-05-23|Hans-Joachim Boltersdorf|Process for the wet treatment of material, sieve drum, kneader and arrangement of several cyclones|
    法律状态:
    2017-12-15| MM01| Lapse because of not paying annual fees|Effective date: 20170411 |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20115379A|FI123000B|2011-04-19|2011-04-19|Drum pulper, pulper system and method for disintegrating fibrous material|
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