FR2801326A1 - Assembly to break down used paper/cardboard and cellulose materials into fibers for a pulp has rotors at different levels within the vessel to soften and shred and break down the materials and disperse clumps in a low cost operation - Google Patents

Abstract

The pulper has a vessel (1), with an outlet (3) at the base to extract the loosened fibers from the used paper/cardboard material. The vessel has at least one rotor (5) to break down the feed material, which can be set at different height levels within the vessel. The height levels within the vessel, from the top, are a wetting zone (A) to soften the feed material and a rotor in the next level (B) rips the material into shreds. The wetting zone has at least two vertical pistons to break the paper/cardboard bales completely, before the released material enters the shredding zone. At least one rotor is at the fiber break-down zone (C) and a rotor is at a lower zone (D) to break down any clumps, fitted with separate teeth. The rotors are each on their own axis (4,6,7), parallel to the vessel wall, each covering the whole of their zones in the vessel. The vessel can have an oblong shape, with at least two rotors on two axes, parallel to the vessel wall, which covers the rotors. The rotors can be offset, where their rotary axes overlap. Stators are fitted between the rotors.

Description

 PULPUR <U> INTENDED FOR </ U> <U> OF </ U> RAW MATERIAL <U> OF </ U> <U> TYPE OF PAPER, CARDBOARD OR CELLULOSE, AND INSTALLATION </ U> <U> FOR BACKGROUND OF THE INVENTION The invention relates to a pulper for the defibration of raw materials of the type paper, cardboard or celluloses. It also relates to an installation for the delivery of old paper pulp using said pulper.

The defibration of papers within a pulper consists in transforming solid dry papers into pulp, this operation also being referred to as "pulping".

The pulper of the invention is more particularly applicable to the re-doughing of all kinds of fibrous materials, in bales or in bulk, and more particularly old brown papers, old white papers for de-inking, for example, but also to the repulping of virgin celluloses.

It should be noted that waste paper, whether brown or white, is recovered stored generally in the form of compact bales, which are kept rimmed, so as to maintain their compactness.

The old paper bales are not only made of papers but also include a number of impurities such as plastic sheets, glass, metal, sand, stones, pebbles etc., the volume and mass of which may represent a significant part of the ball.

Therefore, it is appropriate, with regard to the pulping of waste paper, eliminate all heavy or light impurities, so that the paper from the pulping is easily and commercially reusable.

On the other hand, this problem does not arise for the pulping of virgin cellulose since the virgin cellulose bales are free from any impurities which are troublesome in principle. The pulping of these different types of paper and cardboard is carried out in pulpers destined to disintegrate the mass of raw material. The bales of paper are simply decercled, before being precipitated in the pulper tank.

The pulping of old brown paper mainly containing cardboard boxes and packaging bags, newspapers, magazines ....., requires a very high proportion of water (the fiber concentration is of the order of 4%) , given the current concepts of eliminating these impurities.

Regarding the pulping of waste paper, it is carried out in dilution in water at concentrations between 4 and 15% dry fiber.

Finally, pulping virgin cellulose can be carried out at medium or high concentration, i.e. 5-6% to 12-15%. However, for small productions, pulping is often carried out in conventional pulpers at concentrations of the order of 5 to 6%.

Several pulpers have been proposed for pulping.

Document FR-A-2 544 756 discloses a so-called "helico" pulper comprising a cylindrical tank provided in its bottom with a vertical axis propeller-shaped impeller which impresses material with an axial downward circulation movement, followed by a centrifugal movement ascending from a smooth bottom, then frustoconical, equipped with deflectors. Even if this pulper has the advantage of disintegrating the paper, and leave the impurities little shredded, including plastic sheets in the mass of the dough, it consumes however a significant specific energy.

FR-A-2 169 240 discloses a pulper for the disintegration of cellulose balls. This pulper comprises a cylindrical tank at the bottom of which is positioned a finned rotor, whose lower faces have a cutter. This type of pulper, even if it makes it possible to obtain a disintegration of the raw material relatively satisfactory, however requires the implementation of a consequent energy to allow the mixing of the mass of fibers and water. In practice, the energy required for the disintegration of the paper with this kind of pulper decomposes, as for all conventional pulpers a disintegration energy proper, and a circulation energy of the mixture of water paper, necessary to bring about continuously the raw material in contact with the rotor, to ensure disintegration. Said circulation energy can reach or exceed according to the pulpers, half of the total energy consumed.

In addition, when the pulpers described above are used for the treatment of waste paper, it is noted that the heavy impurities released during the disintegration such as sand, pebbles, iron wires and others, use, by abrasion and shock , the faces and leading edges of the rotor, and the perforated plate under or next to the rotor. In addition, it is observed that very often, a number of iron son wind up damagely around the axis of the rotor.

On the other hand, to accelerate the disintegration of the paper, it has been proposed in document A-4,812,205 to prehydrate the paper before it is introduced into the pulper. The proposed prehydration is carried out by means of steam jets in an enclosure inside which the paper circulates in a worm. While this prehydration step effectively accelerates the disintegration of the paper, it is however performed in a conventional ancillary installation which does not significantly reduce the total energy consumed, and more, the cost of the installation is greatly increased.

In other words, the problem to be solved by the invention is to provide a pulper for the defibration of raw materials, the concept of which reduces the energy consumed, compared to the pulpers of the prior art, decreasing and the cost of the repulping operation of raw materials such as paper, cardboard or celluloses.

Another object of the invention is to provide a pulper for performing the pulping of paper, cardboard or celluloses at higher fiber concentrations, and this, in order to avoid brewing as much water as in the previous pulper, and on the one hand, to reduce the volume of the pulper, and on the other hand, to reduce the specific energy consumed, to obtain, for a given production, the same effect of disintegration.

To do this, the invention provides a pulper for defibrating raw materials such as paper, cardboard or celluloses, comprising a tank whose bottom is equipped with means for discharging the defibrated raw material.

 <U> pulper is characterized in that said tank comprises at least one rotor capable of being positioned in different zones distributed over the height of the tank, associated with means making it possible to ensure the relative displacement of the material first relative to the rotor.

According to a first embodiment, the relative displacement of the raw material inside the vessel relative to the rotor is obtained by making the rotor movable relative to said vessel or vice versa.

According to a variant, in which the tank and the rotor are fixed relative to one another, the means making it possible to ensure the relative displacement of the raw material contained in the tank in the direction of the rotor, consist of at least one mobile baffle. According to one embodiment, such deflectors are preferably three in number, the vessel being cylindrical or cylindro-conical and they are rotated parallel to the wall of said vessel.

In other words, according to the invention, and unlike the pulpers of the prior art in which the mixture of raw material and water,. circulating by the rotor, thus requiring an energy for this important circulation, the impoverished rotor in the pulper of the present invention moves in the mass of the raw material in the first embodiment, whereas in the second form of realization, the mass of the raw material is moved towards the rotor by the action of the deflectors. In this way, the circulating energy is reduced by at least 50 to 80%.

In addition, all relative movements of the raw material relative to the rotor make it possible to subject all the raw material to a homogeneous mechanical action, without lost energy. More specifically, all the elements of paper, cardboard or pasta, receive a similar amount of energy, whereas in the prior art, the amount of energy received by each dough element can not be controlled as a result of the movement of circulation, random and highly variable. Therefore, the grinding must be continued for all the pulp contained in the pulper until the desired degree of grinding is obtained for each element of the pulp. However, since obtaining this degree of defibration implies that a number of dough elements has already reached the desired degree, while other elements are still in the form of pellets, any dough must continue the disintegration into a pulper until the opening of the last pellets.

According to a first embodiment of the pulper the invention, the vessel is cylindrical and the rotor is rotated about the central axis of said vessel.

In a second embodiment of the pulper the invention, the vessel is of parallelepipedal shape and the rotor is moved in translation parallel to one of the sides of said vessel.

In a third embodiment of the pulper, the rotor is fixed and the vessel moves. According to this embodiment, the tank is equipped with baffles and moves the dough towards the rotors.

In a fourth embodiment, the rotor and the bowl are fixed, the displacement of the raw material in the rotor direction being obtained by means of movable baffles.

In order to allow softening of the raw material before its actual pulping, the vat of the pulper has a low hydration first zone, the rotor being positioned in the second zone called shredding of the raw material.

In other words, the pulper of the invention makes it possible, within the same device, firstly to hydrate and thus soften the raw material introduced into the chamber, which is generally in the form of blocks. or plates resulting from the prior opening of the bale, the hydration phase being carried out in contact with water; - Then shredding, that is to say, to reduce the size of said raw material previously softened, thus requiring a reduced energy, releasing if necessary impurities; - Finally, to evacuate the raw material pulping.

To allow refining the shredding of the paper, cellulose board, ie to further reduce the size of the remaining pieces of raw material, at least one rotor is positioned in a third zone called disintegration of the raw material.

In other words, the pulper of the invention acts in two or even three successive phases, respectively # hydration of the raw material, # shredding of the raw material, # then refined disintegration of the raw material, these operations being as already said, performed within the same enclosure.

In practice, the shredding rotor is in the form of at least one disk equipped with teeth. However, the skilled person can choose any form of rotor suitable for performing the shredding function, for example of the flat rotor type, helical rotor with solid screw or screw without core.

Similarly and in practice, the disintegration rotor is in the form of a ring gear. However, those skilled in the art can choose any rotor shape suitable for performing the disintegration function, for example of the flat rotor type with or without bars, helical rotor with solid screw or screw without core.

To allow the de-spattering of the raw material, that is to say the individualization of the fibers that compose it, at least one de-spraying rotor is positioned in a fourth so-called de-spattering zone of the raw material.

In practice, the de-scaling rotor is equipped with thinner teeth than those of the disintegration rotor. Moreover, it can also be equipped with holes or protuberances, to improve, by hydraulic shocks, the dépastillage of the dough. However, the skilled person can choose any suitable rotor shape to perform dépastillage function.

In a first embodiment, the axis of the rotor, whether it is the chipping, disintegration or de-spraying rotor, is parallel to the side wall of the vessel.

In a second embodiment, the axis of the rotor, whether the shredding rotor, disintegration or dépastillage, is perpendicular to the side wall of the vessel.

In a third embodiment, the vessel is equipped with rotors with an axis parallel to the side wall of the vessel and rotors with an axis perpendicular to the side wall of the vessel.

Of course, all these rotors can be, for the same axis, the same diameter or different diameters with very different similar profiles to best adapt to the corresponding work phase.

Similarly, the number of rotors is not limited and is determined according to the size of the tank.

Thus, when the tank is cylindrical, the number of rotors determined as a function of the distance between the central axis of the tank and the wall thereof, as well as the height of the tank, the selected defibration energy and the production to be treated.

Similarly, when the tank is parallelepipedal in shape, the number of rotors is determined as a function of the length of the tank, but also according to the width and height of the tank, the defibration energy chosen and the production to be treated.

In a first embodiment, the shredding rotors, the defibration rotors and the de-spattering rotors of the raw material are arranged on the same axis, parallel to the wall of the tank, the shredding rotors being arranged over the entire area. shredding, the disintegration rotors being disposed over the entire disintegration zone and the dépostillage rotors being arranged on any de-spraying zone.

In a second embodiment, the shredding, disintegrating and deflating rotors are arranged on different axes, the shredding rotors being arranged over the entire shredding zone, the disintegration rotors being arranged over the entire decay zone and the rotors. de-spattering being arranged on the entire depasting zone.

When the tank is of cylindrical shape, to allow rotation of the rotor around the central axis of the tank, the axis on which the rotor is fixed is held by a horizontal arm integral with the central axis of the tank, substantially at its top, said horizontal arm being rotated by means of a motor.

To improve the rigidity of the arm on which is fixed rotor, said arm is held in a frame formed by two horizontal arms connected to the central axis of the tank, respectively at its top and its base, and by two vertical arms connecting horizontal arms, the frame being rotated by means of a motor.

When the tank is of parallelepipedal shape, to allow the rotor to move in the tank, the axis on which the rotor is fixed is secured to a carriage located at the top of the tank, said carriage being in translation by means of an engine. .

When the rotor drive is performed above the tank, the height of the pulper is reduced and the pulper is more accessible. Its installation thus becomes easier, less expensive and loading equipment, smaller in size.

Of course, it is possible to install in the vat of the pulper several arms or trolleys equipped with rotors to obtain, depending on the production, the material and the desired work, the necessary disintegration.

Thus, one can consider the presence of several rotating arms or carriages driving and supporting the rotor discs, which can work at the same level, work staggered being offset in space and / or overlap partially.

Of course, in known manner, rotors are driven by means of one or more motors.

In a specific embodiment, to further increase the energy gain, the diameter of the rotors is reduced so as to concentrate the axes on which the rotors are fixed on only a part of the surface of the tank, the material first being conducted to the area occupied by the rotors by any known means.

In practice, the raw material driven at the area occupied by the rotors by means of baffles.

In another embodiment of the invention, the axis on which the rotors are fixed is animated by a satellite movement through a ring and a toothed zone.

As already said, the bottom of the tank also comprises means for evacuating the raw material delivery paste.

In a first embodiment the raw material is evacuated to the working concentration of the pulper.

In a second embodiment the evacuation of the raw material is carried out at a lower concentration after dilution.

To allow the raw material to be discharged as it is put back into paste, the evacuation means are in the form of at least one extraction screw, advantageously two extraction screws.

When the pulper operates continuously, the speed of rotation of the screw is adjusted so that it extracts as much raw material pulp as raw material and water added to the tank, so that the level of the tank remains constant. In another embodiment, the evacuation means are constituted by a pump, after possible dilution or not of the dough at the bottom of the tank.

Moreover, to optimize the safety of the user of the pulper of the invention and keep clean surroundings, the top of the tank equipped with partial closure means.

In practice, the closure means is in the form of a cover or helmet having an opening intended to ensure the entry of the raw material and water into the pulper.

Advantageously, the helmet or lid is equipped with a helical screw for feeding and / or preliminary disintegration to reduce the size of the raw material to be disintegrated reaching the pulper proper.

The invention also relates to an installation for the pasting of waste paper using the pulper described above.

The installation described below relates more particularly to pulping old paper, that is to say papers that may contain, before treatment, a volume and a mass of solid residues such as pebbles metals, sands, iron wire , glass, plastics etc ... important.

As already mentioned, the re-pulping of old paper is made from paper balls rimmed with wire to ensure their maintenance. In current installations, the bales are first placed on conveyors and then the wires cut manually or automatically. The bales are then conveyed to the pulper in which they are precipitated with all of their impurities, and in particular these iron wires.

To then allow to eliminate the maximum of impurities in the pulper, said pulper is generally equipped with a number of accessories such as pull strand, dock with heavy impurities or "pear" cleaning. These installations have a certain number of drawbacks, in particular with regard to the indispensable presence of the strand puller. In known manner, the strand is a descending rope in the chamber of the pulper, and intended by the rotation of the mixture of water and paper, to retain the son of iron and those 'in turn hold the pieces of plastic . Therefore, as and when release of these impurities in the pulper, one tries to remove the strand at a speed adapted to the variable presence of these impurities. If this speed is too low, the strand grows and can not be removed. If the lifting speed is too fast, the diameter decreasing strand becomes less resistant to the attraction forces created by the rotor and can break and fall to the bottom of the tank where it will be necessary to try to retrieve it.

It should be noted that the drawbar is the only machine in all waste paper pulp systems, which can not be automated.

Faced with the problem of systematic damage to the pulper mechanism in this type of installation but also the need to regularly stop its operation, the Applicant had the idea to eliminate the maximum amount of waste before the introduction of the material first in the pulper previously described.

To do this, the installation for pulping old paper using the pulper of the invention comprises in the order of intervention in addition to the pulper arranged at the end of the chain - a means of transporting paper bales; means for cutting, removing and packaging the iron wires surrounding the paper ball; means for opening the bale; means for prehydration and reduction of the size of the open bale comprising means for recovering and then removing the major part of the heavy impurities.

In other words, once the balls have been decelerated and opened, the individualized plates are freed from their heavy impurities while being prehydrated and roughly shredded, in order to facilitate the pulping process of the pulper. According to a first feature of the installation, the means of transporting paper balls to the cutting means is in the form of a conveyor.

Furthermore, the means for cutting, removing and conditioning the iron son surrounding the paper ball are integrated within an automatic deconcling machine.

Furthermore, the subsequent means of opening the bale can be in the form of at least one single screw screw conveyor or several endless, with or without core, for separating the paper bales into individual plates, and release the dense impurities.

According to another characteristic of the installation, the means for prehydration and further reduction of the size of the open bale are in the form of a swimming pool equipped with at least one screw, into which the individualized paper plates are poured.

As soon as the paper plates are poured into the pool, the dense impurities previously released, will fall by gravity to the bottom of the pool. It is therefore necessary first of all to provide means for recovering the dense impurities at the bottom of the pool, in particular a possible automatic dredge system, and then means for removing these impurities in the form of an impurity tank. heavy.

Furthermore, to promote the additional elimination of dense impurities and ensure the mixing and advancement of the raw material, the pool is equipped with brewing means in the form of eg paddle wheels and / or Archimedes.

To reduce the size of the paper plates and thus facilitate the work of the pulper, the screws conveying the paper have cutting edges of the knife and knife type, or pins, the effectiveness of the work of the screws being further increased because the paper is wet. To help move the plates to the screws, the pool wall is equipped with pressurized water supply nozzles to create a hydraulic current.

Finally, to eliminate sand and dirt that may stick to the paper plates, the pool is also equipped with rinsers. The rinsing water can then be treated in cyclonic purifiers, in order to eliminate this sand and these other dense impurities contained in the water, thus favoring the subsequent work of other machines of the process (pulper, pumps, agitators, ... The paper is then conveyed to the pulper of the invention itself, thanks to the transport propellers and / or paddle wheels and / or hydraulic streams.

In the pulper, the paper is put back into paste by requiring, as already seen, a minimum energy expenditure given the concept of said pulper.

However, the pulp after treatment in the pulper can still contain a number of plastic pieces and staples.

In this case, the pulped paper is conveyed any means, preferably by means of one or more endless screws to the means for eliminating said plastics and / or staples.

However, the use of the pulper is not limited to its implementation within an installation for the pulping of waste paper. Indeed, it can be used for suspending fillers used for coating sauces in the field of stationery.

The advantages of the invention will emerge more clearly from the following exemplary embodiments, in support of the appended figures.

Figure 1 is a schematic representation of the pulper the invention according to a first embodiment.

Figure 2 is a top view of the pulper of Figure 1. Figure 3 is a schematic representation of the pulper of the invention according to a second embodiment.

FIG. 4 is a view from above of FIG.

Figure 5 is a schematic elevational view in section of a third embodiment of a pulper according to the invention.

The figure is a view from above of FIG.

Figure 7 is a schematic representation of an installation for the treatment of waste paper incorporating the pulper of the invention.

The figure is a depiction of a swimming pool capable of moisturizing an open paper ball and reducing the size of the raw material.

FIG. 1 shows the pulper for pulping of raw material of the type of paper, paperboard or cellulose of the invention in a first embodiment. This pulper comprises a cylindrical vessel designated by the general reference (1) provided with a central axis (2) and means for evacuation of the pulp material (3).

On the height of the tank (1) are distributed from top to bottom # a first so-called hydration zone (A) of the raw material; # a second zone called shredding of the raw material (B); # a third zone (C) called disintegration of the raw material; # a fourth zone (D) called dépastillage of the raw material.

According to a first characteristic of the invention, the vessel (1) comprises at least one rotor (5) rotated around the central axis (2) of the vessel.

In an embodiment not shown, the shredding rotors, disintegration and dépastillage are distributed throughout the three aforementioned zones on the same vertical axis (4).

In another embodiment, the aforementioned rotors are arranged on different vertical axes (4,6,7) in the different zones B, C and D.

To allow the rotation of the axes on which the rotors are fixed around the central axis of the tank, said axes are held inside a frame designated by the general reference (8), consisting of two horizontal arms (9 , 10), whose ends are connected by two vertical arms <B> (11, 1 </ B> 2).

frame (8) is rotated about the central axis (2) of the tank by means of a motor (13).

frame (8) made integral with the central axis (2) by any known mechanical means.

In an embodiment not shown, the pulper of the invention is partially closed, in particular by a helmet, which is equipped with a funnel for discharging the raw material and water directly above the level of the area occupied by the first rotors.

FIG. 2 shows, from above, the pulper of the invention according to FIG.

As shown in this figure, the arm (9) is equipped with three axes (4,6,7) supporting the rotors (5), the axes being evenly distributed along the length of the arm (9).

However, and as already said, the arm may comprise more or fewer axes equipped with rotors depending on the diameter of the tank, but also the nature of the raw material to be disintegrated and the production to be treated.

Axes equipped with rotors (4,6,7) are rotated by means of single motor 4) or a motor by axis.

In a second embodiment shown in Figures and 4, the vessel is generally parallelepipedal shape. In this case, the arm (9) is fixed by each of its ends on a carriage (15), which is mu, by means of a motor not shown, on rails (16).

In this way, the rotors (5) are moved in translation over the entire length of the parallelepipedic tank. elsewhere, the evacuation means (3) of the pulping raw material are shown in the figure as two extraction screws.

two extraction screws allow to keep constant by adding water and raw material at the top of the tank, the level of said tank, so that the treatment can be performed continuously when necessary.

However, the pulper can process all fibrous raw materials and the plant can operate in batch mode.

Figures 5 and 6 illustrate a third embodiment in which the vessel (1) and the rotors (5) are fixed relative to each other, and said vessel (1) is generally cylindrical in its part upper (la) and conical in its lower part (lb). In such a case, the displacement of the raw material inside the tank (1) in the direction of the rotors (5) arranged in the central position and of the number of three, is obtained by means of deflectors designated by the same reference general (P). These deflectors will be rotated by a gear motor (M), inside the tank.

In the illustrated embodiment, the deflectors (P) comprise at their base a solid portion (P1) in the shape of a blade and are connected to a frame (C) associated with the geared motor (M) by a perforated structure constituted, in the illustrated form of connecting bars spaced from each other.

Compared to the two embodiments described above, such a solution has a very great technical simplicity and eliminates any sealing problem that.

In Figure 7, there is shown schematically an installation for the delivery of old paper pulp.

This installation comprises in the order of intervention - means of transporting paper bales (17); a unit for cutting, removing and packaging the wires surrounding the paper ball (18); a unit for transporting and opening the bale (19); - a pool to retain dense impurities, to prehydrate reduce the size of the open ball (20); - A pulper of the type described above (21) performing the pulping as such.

As already said, the decercling of the paper ball can be done either manually or by means of an automatic machine.

paper ball thus decercled is then opened (19) by means of a conveyor with or without core, while being simultaneously conveyed into the pool (20).

The pool aims to eliminate most of the heavy impurities present in said paper bales, to reduce the size of the raw material entering the pulper, and also to moisten the paper.

As shown in Figure 8, the pool (20) is in the form of a parallelepipedic tank, inclined bottom, equipped with drummers (22) for stirring to push the paper into the water for its complementary mixing and coarse shredding by the two screws with sharp edges of the knife and counter knife type (23), so that it can also hydrate properly and allow the release of dense impurities still retained between the paper plates.

even, to promote the movement of the plates to the screws (23), pool equipped with nozzles (28) for supplying water under pressure.

At the same time, the bottom of the pool is dredged using a suitable bottom drag system (24), so as to recover all heavy impurities dropped by gravity, which are then removed by means of an impurity lock (25).

Moreover, to allow maximum elimination of the sand present on the paper, the pool is also equipped with rinsers (26). The rinsing water can then be treated in cyclonic purifiers after extraction through a perforated plate (27). The raw material thus freed from the majority of its heavy impurities and pre-moistened is then conveyed to the pulper of the invention (22), by means of the screws (23).

The paper introduced into the pulper is therefore free of the majority of large impurities, prehydrated and coarsely shredded, which increases the efficiency of the pulper.

However, the pulp after treatment in the pulper may still contain a number of plastic pieces and staples.

In this case, the pulped paper is conveyed by any means, preferably by means of an endless screw to unrepresented means for eliminating said plastics and / or staples.

The advantages of the invention are apparent from the description.

Indeed the pulper invention allows to paste continuously or discontinuously any type of raw materials, whether virgin cellulose, waste paper, etc ..., using a consume energy significantly lower compared to the pulpers l prior art, and obtaining a more homogeneous decay.

The installation for pulping old paper using the pulper of the invention has the advantage of eliminating the majority of heavy impurities contained in the paper before introduction of said paper into the pulper. It follows, in addition to the fact that the rotor system is not damaged, that the fiber concentration in the chamber of the pulper can be increased.

Claims (1)

 1 pulper for the defibration of raw materials of the paper type, cardboard or celluloses, comprising a tank (1) whose bottom is equipped with evacuation means (3) the raw material defibrated, characterized in that said vessel (1) comprises at least one rotor (5) capable of being positioned in different zones distributed over the height of the tank (1), associated with means making it possible to ensure the relative displacement of the raw material with respect to the rotor (s) (5). 2 / Pulper according to claim 1, characterized in that relative displacement of the raw material inside the vessel relative to the (x) rotor (s) is obtained by making the rotor (s) (5) movable (s) relative to tank (1) or vice versa. 3 / Pulper according to claim 1, characterized in that the) the (e) rotor (s) (5) and the vessel (1 are fixed relative to each other, the relative displacement of the raw material contained in the tank in the direction of the rotor (s) (5) being provided by at least one movable deflector rotated parallel to the wall of the vessel). 4 / Pulper according to one of claims 1 and 2, characterized in that the vessel (1) is cylindrical and the rotor (5) is rotated about the central axis (2) of said vessel. 5 / Pulper according to one of claims 1 and 2, characterized in that the vessel (1) is of parallelepiped shape and the rotor (5) is moved in translation parallel to the sides of said vessel. 6 / Pulper according to one of the preceding claims, characterized in that the tank has upwardly a first hydration zone (A) for softening the raw material, at least one shredding rotor (B) being positioned in a second zone called shredding of the raw material. 7 / Pulper according to claim 6, characterized in that at least one disintegration rotor is positioned in a third zone called disintegration (C) of the raw material. 8 / pulper according to one of claims 6 or 7, characterized in that at least one dépostillage rotor is positioned in a fourth so-called dépastillage zone (D) of the raw material. 9 / Pulper according to one of claims 1 to 8, characterized in that the axis (4,6,7) of the rotor is parallel to the side wall of the vessel. 10I pulper according to one of claims 1 to 8, characterized in that the axis of the rotor is perpendicular to the side wall of the vessel. 11 / Pulper according to one of claims 1 to 8, characterized in that the vessel is equipped with parallel axis rotors to the wall of the vessel and rotors axis perpendicular to the wall of the vessel. 12I pulper according to one of claims 6 to 9 and 11, characterized in that the shredding rotors, the disintegration rotors and the de-scaling rotors of the raw material are arranged on the same axis, parallel to the wall of the tank , the shredding rotors being disposed over the entire shredding zone, the disintegration rotors being disposed over the entire disintegration zone and the dépostillage rotors being disposed over the entire depasting zone. 13I pulper according to one of claims 6 to 8 and 10 to 11, characterized in that the shredding rotors, disintegration and dépastillage are arranged on different axes, the shredding rotors being arranged over the entire shredding zone, the disintegration rotors being disposed over the entire decay zone and depasting rotors being disposed over the entire decanting zone. 14 / Pulper according to one of claims 12 or 13, characterized in that the axis on which is fixed the rotor is held by a horizontal arm (9) integral with the central axis of the vessel, substantially at its level. top, said horizontal arm being rotated by means of a motor. 15 / Pulper according to one of claims 12 or 13, characterized in that the axis on which is fixed the rotor (5) is integral with a carriage (15) at the top of the tank, said carriage being moved in translation by means of a motor. Pulper according to one of claims 1 to 15, characterized in that the evacuation means (3) are in the form of at least one * extraction or a pump. 17 / Installation for pulping old paper using the pulper object of one of claims 1 to 16. 18 / Installation according to claim 17 comprising in the order of intervention in addition to the pulper (21) arranged in end of chain - means of transport (17) of paper bales; - Cutting means, (18) for removing and packaging iron son surrounding the paper ball <B>; </ B> - opening means (19) of the ball; means for prehydration and reduction of the open bale size (20) comprising means for recovering and eliminating the major part of the heavy impurities. Installation according to Claim 17, characterized in that the means for opening the bale are in the form of a conveyor screw (19). Installation according to one of claims 18 to 19, characterized in that the means of prehydration and reduction of the size of the open bale are in the form of a pool equipped with at least one screw (23). 2 Installation according to claim 20, characterized in that the screws (23) have cutting edges of the knife and counter-knife type. Installation according to one of claims 20 or 21, characterized in that the means for recovering impurities at the bottom of the pool are in the form of an automatic bottom drag system (24) while the means for eliminating the impurities are in the form of an airlock with heavy impurities (25). 23 / installation according to one of claims 20 to 22, characterized in that the pool is equipped with rinsers (26) capable of removing sand remained glue on paper and -hydrate paper. 24 / Use of the pulper object of one of claims 1 to 16 for suspending charges used in the coating sauces.