Classifications

• • C—CHEMISTRY; METALLURGY
  • C14—SKINS; HIDES; PELTS; LEATHER
  • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
  • C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
  • D06F39/08—Liquid supply or discharge arrangements
  • D06F39/083—Liquid discharge or recirculation arrangements
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
  • D06F39/08—Liquid supply or discharge arrangements
  • D06F39/088—Liquid supply arrangements
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
  • D06F37/02—Rotary receptacles, e.g. drums
  • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis

Definitions

• the present invention relates to a device for skin treatments and in particular to an associated tanning process.
• the present invention may also relate to the use of such a device for the treatment of textiles, for example in the form of fiber flocks or finished products.
• the devices for the various skin tanning steps are well known and are essentially in the form of fullers that is to say, devices having a rotary reservoir into which a liquid or a treatment bath is introduced. to remove hairs, grease, shreds of flesh and soften the skins.
• a dyeing step may also be provided within the same tank.
• steps are more precisely constituted by the steps of pickling, tanning, retannage and feeding.
• the various steps of the tanning process are themselves preceded by a skin preparation, also known as "river work".
• river work During this work, the skins are soaked in water, mixed with a chemical solution, peeled in the lime to release the hair, which is removed by a step of barking, then the skin is flaked and unshelled . The skin then reduced to the dermis, the only usable, then takes the name of "skin in tripe". All of these various stages that are called “river work” are usually also performed within rotary fullers.
• the fullers are rotary tanks in which are introduced for the different stages of the appropriate treatment baths and for which among other things the treatment time, the bath temperature, the rotation speed, the composition of the bath are dictated by very specific rules that depend on the type of skins and finished products that one wishes to obtain. At the end of the course, we can consider that the dyeing of the skins is also done within these same fullers.
• fullers are in the form of a large tank or a tank which by successive rotations in both directions (rotation) will beat the skins to rid them of their hair and flesh or allow a homogeneous treatment.
• Wooden struts have long been used, which have recently been replaced by steel straps and especially in stainless steel.
• both wood struts and steel struts have the main disadvantage that they are likely to be damaged by corrosion treatment baths and thus allow elements to detach from the wall of the fuller and are able to damage the skins during treatment within the fullers.
• plastic struts such as polypropylene, polystyrene or even polyester.
• a first improvement of the tanning process which is described in the document FR A-2512063, consists in proposing a fuller divided into two or more chambers or longitudinal and axisymmetric compartments, the chambers or compartments being separated by partitions in the form of propeller or screws that allow the threshing of skins no longer from top to bottom in the direction of rotation of the fuller as is the case in the first generation of fullers but rather horizontally from left to right, this thanks to the shape specific to the partition wall.
• Another advantage of this configuration in several compartments is to increase the usable capacity for the same tank dimension.
• the present invention aims in particular to attach to the water transfer system and suitable treatment baths and more particularly to the injection system and the extraction system and / or recovery baths.
• the present invention aims in particular to provide a suitable system of introduction (injection) and recovery (extraction) of the liquid (and baths) treatment, water saving, a saving of chemicals and chemicals. even a saving of energy and this in order to reach the requirements of ecology very restrictive which prevails currently.
• the present invention is also intended to reduce production costs by reducing the amount of water used by a possible recycling, a decrease in the amount of chemicals and a net decrease in the amount of energy necessary to treat skins or textiles with an increase in productivity by proposing to reduce the duration of the baths.
• the present invention also aims to improve the quality for a permanent control throughout the duration of the process and an improvement in ecological aspects by appropriate recycling.
• the present invention relates to the treatment and / or tanning of skins and / or textile elements to be treated comprising a rotary reservoir having a wall of convolution about a central axis of rotation and at each of its ends a first and second side walls, the tank being adapted to receive said skins and / or textile elements to be treated and at least one treatment liquid, said device comprising at least:
• a second circuit designed to extract at least a portion of the treatment liquid from the reservoir
• the first circuit comprises at least one supply channel for the process liquid, which channel comprises an outer wall preferably provided with perforations and extending substantially along the central axis of the reservoir,
• the second circuit comprises at least one discharge channel of polluted treatment liquid or wastewater extending substantially along the central axis of the reservoir, said rejection channel being arranged concentrically and inside the channel feed.
• said perforations are designed to be able to inject said treatment liquid into the reservoir.
• the presence of said perforations, on the portion of the outer wall of the feed channel, and over most of its length (at least 70% of its length) makes it possible to easily inject the liquid into the reservoir.
• the feed channel and the rejection channel at least partially form a central shaft, possibly arranged concentrically with respect to the central axis of rotation.
• the central shaft comprises a plurality of separate and concentric systems or assemblies, each of the assemblies comprising a supply channel arranged concentrically with respect to and outside a rejection channel.
• the second circuit comprises one or more discharge ducts which preferably at one end join a radial zone of the reservoir and preferably join the rejection channel at the other end.
• the spill duct or pipes join at one end either directly to the convolution wall or an extension thereof.
• the spill duct or ducts are present on the side of the second wall of the tank.
• the feed channel is designed to be fed by one of its ends at a lateral end close to the first side wall of the tank while the discharge channel is fed to the other side end.
• the liquid extracted by the reject channel is removed from the tank at the same lateral end of the tank as the introduction of the treatment liquid into the supply channel, that is to say close to the first side wall.
• the junction with the first and second circuits is effected by means of a rotary joint.
• the spill duct or conduits extends (ent) along a portion of the circumference of said reservoir preferably over an angle of at least 90 °.
• each of the discharge ducts radially joins the tank convolution wall. at angular positions spaced along the circumference of said tank.
• the rejection channel is sealed.
• the device comprises a bearing for the support of the central shaft disposed at one end while at the other end the tank is supported by the convolution wall preferably on rollers.
• the central shaft does not project to the outside of the tank.
• the device comprises an outlet chute disposed on the second side wall, preferably concentrically with respect to the axis of rotation, an outlet chute which is equipped with one or more evacuation doors.
• the device is designed to operate essentially in a single direction of rotation, the reverse direction of rotation being used solely for the extraction of the skins or textile elements to be treated from the reservoir, and this with the aid of blades which are arranged in a manner close to the outlet trough and the corresponding evacuation door.
• said device is designed such that the treatment liquid present in the discharge channel flows against the current with respect to the treatment liquid present in the supply channel and thus allowing a heat exchange. .
• the supply duct is designed to allow the injection of steam into the tank through the perforations.
• the filtration device of the treatment liquid is connected between the first circuit and the second circuit.
• the filtration device is disposed statically with respect to the rotary tank.
• a third circuit is intended for evacuation and / or injection of air into said tank.
• the reservoir comprises a perforated separation wall which separates in two parts the reservoir in particular a first and a second part and which is arranged so as to be permeable to said treatment liquid and to waste, dirt or impurities transported by the treatment liquid, the second part being designed to receive the skins or textiles to be treated, the wall for trapping waste, dirt and impurities in the first part of the tank while not allowing the passage of said skins or textiles to be treated in this first part of the tank, wherein the discharge duct (s) is or are designed (s) to remove at least a portion of the treatment liquid from the first part of the tank.
• the first part of the reservoir extends along at least part of the circumference of the reservoir.
• the reservoir has at least one substantially helically shaped separating partition extending longitudinally over substantially the entire length of the reservoir and secured to the central shaft and the convolution wall of the reservoir so as to separate said reservoir in at least two chambers or treatment compartments, each of the chambers or compartments may contain the skins or textile elements to be treated.
• the partition wall is perforated to allow an exchange of the treatment liquid between said chambers or compartments.
• the partition wall is sealed.
• the partition wall is provided with means for retaining or guiding skins or textile elements to be treated, such as baffles, bars or dowels.
• the chambers or compartments are arranged axisymmetrically.
• the tank tank and optionally the partition is made of a polymeric material, preferably polyester.
• Figures la, lb, ld and ld are 3D representations of the outside of a fuller according to the present invention.
• Figure 2a shows an exploded perspective view of a tank with two chambers or compartments, used in the context of the present invention.
• Figures 2b, 2c and 2d respectively show a longitudinal sectional view of the inside of the tank of a device according to the present invention and a cross-sectional view at the plane AA (Figure 2c) and at the level of BB plane ( Figure 2d) shown in Figure 2b.
• Figure 3a shows a detailed view in section of the interior of a tank of the device according to the present invention while Figure 3b shows a view of the outside of the tank corresponding to the rear face.
• Figures 4a and 4b show sectional views (partial) longitudinal and transverse of a device according to the present invention essentially consisting of a tank or fuller where clearly appear the circuits for injecting and extracting the treatment liquid.
• Figures 5a and 5b show a cross-sectional view of a central shaft of a device according to the present invention for two particular embodiments which comprises two chambers or treatment compartments respectively unsealed and sealed between them and in the latter case that have separate systems of supply / injection and extraction / rejection.
• Figures la-e represent several perspective views taken from the outside of a preferred embodiment of the device for the treatment and / or tanning of skins or textiles to be treated according to the present invention.
• the device also called fuller includes a frame (200) which is in the form of a frame or a welded assembly, made for example from profiles in UPN and IPN on which are mounted two bearing rollers (201) (Fig. 2a) and a rear bearing (202) with oscillating roller bearing to obtain a perfect horizontal alignment of the fuller. The whole is treated anticorrosion.
• the device according to the present invention is conventionally in the form of a tank (11) rotating which serves as a vessel.
• the reservoir consists of a convolution wall (111) around a central axis (12) and first and second side walls (113 and 114) disposed at each of the ends (113a and 114a) of the wall. convolution (111) so as to form an internal volume serving as a reservoir (11).
• the tank which constitutes the tank is preferably made of a resistant material such as polyester. laminate preferably comprising at least 5 to 10% of glass fibers coated in an anticorrosive polyester resin. Particular attention will be paid to the production of the surfaces in contact with the baths and / or the skins or textiles to be treated by coating them with a layer of specific hard resin in order to obtain resistance to all the conventional chemical agents. used in tannery, tanning or even various textile treatments (pH between 1 and 13).
• the internal structure of the tank is made completely of polymeric material and preferably of polyester resin so that the skins or textiles to be treated never come into contact with any other material (for example the steel used for bearings, evacuations, etc.).
• the structure of the tank provides excellent thermal insulation, particularly if it is made of a polyester resin; the insulation index is better than that of wood and polypropylene.
• the wood has an index of 0.18 Kcal, polypropylene an index of 0.19 Kcal and polyester an index of 0.2 Kcal.
• This tank is advantageously equipped essentially with a double bottom (preferably conical), possibly perforated.
• the reservoir preferably comprises two side doors (210a, 210b) which are preferably arranged symmetrically on the convolution wall (111) and which allow the loading and optionally the unloading of the skins or textiles to be treated. These doors also allow the introduction of solid products (chrome ).
• the device (10) according to the present invention also has a particularly advantageous manner and this in particular for the treatment of skins or textiles to be treated in large tannery and as shown in Figures la, 2b, 3a outlet channel (220) preferably disposed axially on one of the side walls (113 or 114), preferably at the second wall (114).
• one or more inspection windows (230) will advantageously be arranged as shown in FIGS. 1a, 1d and 2a.
• the outlet trough (220) is preferably circular and arranged concentrically with the axis of rotation (12).
• a door called said front door (221) evacuation for skins or textiles to be treated.
• This door can be in one or more parts especially in the case of the presence of several chambers or sealed treatment compartments.
• Figure 3a shows a longitudinal sectional view of such a device where it is clearly shown the convolution wall (111) of the rotary tank and the two side walls (113, 114). Similarly, there is shown schematically the central axis (12) of rotation of the reservoir (11) rotating.
• the reservoir (11) also comprises an inner perforated partition wall (16), preferably in the form of a sheet, which separates the reservoir (11) at least in two parts. ; on the one hand a first portion (17) preferably constituting a conical ring at the end and adjacent to one of the two side walls and in particular close to the second wall (114), itself close to the outlet trough ( 220) and in which the liquid and the waste can be discharged through the perforations (162) of the wall (16) and secondly at least a second portion (18) constituting the treatment chambers or compartments (11 and 11a) in which the skins or textiles to be treated are arranged.
• a first portion (17) preferably constituting a conical ring at the end and adjacent to one of the two side walls and in particular close to the second wall (114), itself close to the outlet trough ( 220) and in which the liquid and the waste can be discharged through the perforations (162) of the wall (16) and secondly at least a second portion (18) constituting the treatment chambers
• the wall (16) is permeable allows a separation of waste, impurities and other dirt from the rest of the treatment bath and allows to purify as the bath treatment in which the skins or textiles to be treated bathe and incidentally to trap the waste, impurities and dirt within this first part (17) while avoiding a re-contamination of the treatment bath present in the second part (18).
• Figures 4a and 4b show sectional views (partial) longitudinal and transverse of the device according to the present invention and in which there is clearly observed the circulation circuits of liquids and treatment baths.
• the device comprises a first circuit (13) designed to inject the treatment liquid into the reservoir, and a second circuit (14) designed to extract from the reservoir (11) at least a portion of this liquid treatment.
• the first circuit (13) is defined as the injection circuit and allows to bring the liquid or treatment bath clean, unpolluted and / or filtered, to the chambers or treatment compartments.
• This circuit includes all the pipes, channels and ducts between the chambers or treatment compartment in the tank (11) and the place of filtration.
• the second circuit (14) is the circuit for extracting the polluted liquids or wastewater from the tank and bringing them to a filtration or evacuation device.
• a filtering device (7) which may be optionally static is provided in order to process, filter and finally remove reinject the liquid treatment via a pump (8) within the first circuit (13) via (via) a return.
• the filtration device may comprise a control tank (2), a pH control device (3) and / or a temperature control device (4).
• the second circuit (14) is equipped with a closing valve which is present at the outlet of the second circuit (14) for extracting the reservoir (11). ).
• the filtration device (7) is preferably constituted by a solid / liquid separator preferably static and which separates the solid waste and deposit in a waste tank (6), the liquid which can possibly be reinjected into the first circuit (13) via a pump (8).
• the second circuit (14) which is the liquid extraction circuit has at least one portion disposed in a preferred manner. concentrically to the central axis (12) of rotation, this portion being substantially in the form of a discharge channel (144) which preferably extends substantially over the entire length of the tank (11).
• the injection circuit (13) comprises a supply channel (131) of the treatment liquid which may be in the form of a hollow shaft.
• the feed channel (131) is concentrically disposed with respect to the reject channel (144).
• the rejection channel (144) is concentric with the axis of rotation (12)
• the supply duct is concentrically arranged with respect to the central axis (12).
• the assembly constituted by the supply channel (131) and the rejection channel (144) optionally surrounded by a protective envelope for the skins and / or textile elements to treat is the central shaft (120), as described in detail in Figure 5a.
• each of the chambers or treatment compartments (11 and 11a).
• This requires, as shown in FIG. 5b, the presence of two separate systems of first (13 and 13a) and second (14 and 14a) circuits.
• Each circuit system has a set of concentrically arranged feed pipes (131 or 131a) and discharge pipes (144 or 144a).
• an individual system of reject channel and supply channel placed concentrically relative to each other.
• Each of the systems being arranged, preferably, symmetrically but eccentric with respect to the axis of rotation (see in particular fig.5).
• each of the systems (feed channel, reject channel) is arranged parallel to the other, preferably over the greater part (greater than 70% of the length of the tank.
• the supply channels (131) and rejection (144) of the first and second circuits are arranged concentrically, the supply channel (131) of the first circuit being arranged outside. the rejection channel (144) of the second circuit.
• the (internal) rejection channel (144) of the second circuit is preferably sealed while the supply channel (131) of the first circuit is preferably perforated in order to be able to distribute over most of the length of the reservoir, the treatment liquid.
• the supply channel (131 or 131a) is fed at the end coinciding with the first side wall (113).
• the discharge channel (144 or 144a) of the extraction circuit (14) discharges the wastewater (outlet side of the discharge channel (144 or 144a). enter Extraction and injection is greatly simplified.
• a flow in both channels is obtained which is countercurrent, as indicated by the arrows in FIG. 4a. This is particularly advantageous when the liquid is maintained at an elevated temperature (greater than 30 ° C.) in the tank, the countercurrent flow allows an exchange of thermal energy between the extracted liquid (channel 144 or 144a) and the injected liquid (channel 131 or 131a).
• the supply channel (131 or 131a) of the first circuit extends longitudinally over the greater part, that is to say over more than 70% of the length of the reservoir (11).
• the supply channel (131 or 131a) is of cylindrical shape or any other equivalent form.
• the rejection channel (144 or 144a) is of cylindrical shape or any other equivalent form.
• the supply channel (131 or 131a) advantageously has perforations (132) for dispensing the treatment liquid preferably on the majority and preferably all along the longitudinal axis of said reservoir. This provides a homogeneous and immediate distribution of treatment chemicals dissolved in the treatment liquid while avoiding concentrations of these agents in some places in the tank, which could damage the skin or textiles to be treated.
• the supply channel (131 or 131a) in particular in the case where several concentric systems are arranged in parallel in order to allow leak-tight distribution in each of the chambers or treatment compartments (11 or 11a). provided only perforations (132) adjacent adjacent surfaces of the chamber or compartment (11 or 11a) corresponding (that it is desired to "irrigate").
• the two concentric and separate systems which each consist of a channel of supply (131 or 131a) and a reject channel (144 or 144a) (which extend substantially parallel over the majority of the length of the tank) must at the first side wall (13) join to form a rotary joint (160).
• a rotary joint 160
• the inlet of the feed channel (131 or 131a) corresponds to the exit of the rejection channel (144 or 144a) at the level of the first lateral wall (13).
• the junction with the first and second circuits is performed using said rotary joint (160).
• a single rotary joint allows the connection to several injection circuits / or extraction.
• the output of the feed duct (131 or 131a) corresponds to the inlet of the reject channel (144 or 144a) preferably at the second side wall (114).
• the junction between the two types of channels is preferably effected by means of spill ducts as described below.
• the discharge channel (144 or 144a) which is preferably sealed is made of steel.
• the feed channel (131 or 131a) which is preferably perforated is made of a polymeric material and preferably in the same material as the polyester tank.
• each extraction circuit (14) also comprises one or more discharge ducts (141) which advantageously join a radial zone of the reservoir (11), preferably close to the first portion (17) which contains the waste, on the convolution wall, preferably at the end (114a) opposite that of the output of the second (s) circuit (s) (14).
• This or these discharge ducts (141a, 141b, ...) extend in part substantially on an (outer) portion of the circumference of said reservoir (11). In the case where there are several discharge ducts, they are placed at spaced (different) angular positions (142a, 142b) along the circumference of said tank.
• Each of these discharge ducts (141a, 141b, ...) travels at an angle of at least 90 ° before joining the rejection channel (144) arranged at the center close to the central axis (12) of the reservoir (11), preferably at essentially the same axial position.
• a junction (145a, 145b) between each discharge duct (141a, 141b) and the discharge channels (144, 144a) will be radially along the second side wall (114).
• each of the discharge ducts (141a, 141b) joined by one of its ends the first part (17) of the tank which contains the waste (and not the skins or textiles to be treated) and which is separated by the wall (16) for separating the second part (18) (which contains only the skins or textiles to be treated), which makes it possible to evacuate the wastewater from the treatment compartments (11, 11a).
• the discharge ducts (141a, 141b) preferably open in a radial zone of the reservoir, for example on the convolution wall (111) or an extension thereof.
• cylindrical projections (115) are provided on the side wall (114) at the height of the convolution wall (111). Each of the cylindrical projections (115) is in communication with the first portion (17) and with a corresponding discharge duct (141a, 141b).
• Each of the discharge ducts (141a, 141b) advantageously performs a path on an angle of at least 90 °, which offers the possibility of discharging the polluted liquid or treatment bath, that is to say wastewater, without the use of a pump, under the simple action of the gravity that is obtained by rotating the tank (11) in the direction indicated by "0".
• the set of concentric supply channels (131) and discharge channels (144) and spill ducts (141) is in the form of a very compact set compared to existing systems.
• This third circuit may be designed as one or more conduits (146, 147) extending to the discharge conduits (141a, 141b), but which enter the reservoir through different angular positions (146a, 147b) through relation to the spill ducts (141) on the convolution wall (111) ⁇
• the (11) has a partition wall or blade (15) of substantially helical shape which preferably extends over the entire length of the tank (11) with an axis of rotation which corresponds to the central axis (12) of rotation of the tank (11).
• partitions may be provided, separating the reservoir in addition to two chambers or longitudinal compartments.
• these partitions divide the reservoir into axisymmetric compartments.
• This blade can form a partition as described in document FR-A-2368539 and which is fixed to the inner walls of the tank (11) so as to allow separation of said tank in at least two chambers or longitudinal compartments (11 and 11a) of a substantially equivalent volume, each of the chambers or compartments may contain about the same amount (half, one third, ...) of the skins or textiles to be treated.
• the partition or partitions (15) are integral with the central shaft (120) comprising (optionally) one or more concentric sets of supply channels (131) and rejection (144). [0098] Preferably, the partition or partition walls
• each supply channel (131, 131a) is arranged concentrically with respect to a rejection channel (144, 144a) as shown in FIG. 6b.
• the device (10) constituting the drum as described above will advantageously be equipped with a set (not shown) brake reduction motor which consists of a pulley and belt system placed between the motor and the gearbox thus allowing to change the speed of rotation of the fuller particularly in order to adapt it to the desired working conditions.
• a set (not shown) brake reduction motor which consists of a pulley and belt system placed between the motor and the gearbox thus allowing to change the speed of rotation of the fuller particularly in order to adapt it to the desired working conditions.
• it will also be possible to invert the rotation of the fuller in the direction indicated by "V" in FIG. 3b in particular to be able to extract the skins or textiles to be treated via the outlet chute (220) and the door (221) for evacuation of the skins or textiles to be treated or to carry out a faster emptying.
• Transmission of the motor movement to the reservoir can be effected by means of preferably trapezoidal belts.
• the device (10) is designed to operate essentially in a single direction of
• Reverse direction of rotation (V) is used for the emptying of the skins or textiles to be treated for example by the outlet chute (220).
• a simplified mode of operation is thus obtained, making it possible to extract the skins or textiles to be treated laterally from the tank automatically by the evacuation door (221), instead of a manual extraction by the side doors present (210a and 210b) on the convolution surface (111).
• the extraction by the outlet chute (220) is made particularly effective thanks to the presence of output blades (170) also arranged parallel (along) the axis of rotation (12).
• the central shaft (120) extends (advantageously) not beyond the door (221) for evacuation of the skins or textiles to be treated, the reservoir being supported. at this end (114a) on the wall of convolution (111) by carrying rollers (201).
• the central shaft (120) can be connected to the convolution wall (111) by support bars, or any other means.
• baffles (150) in the form of bars or dowels
• the helical configuration of the partition wall (15) associated with the presence and adequate disposition of said baffles (150) achieves this goal while ensuring operation without reversal of the direction of rotation. This is observed by an appropriate use of this configuration, a reduction of fatigue of the material with a more regular work on the skins or textiles to be treated.
• Another advantage is to eliminate waiting times between each inversion of the direction of rotation and thus significantly increase productivity.
• One of the particularities of the fullers is the important mixing of the treatment baths verified by the speed with which the baths are distributed in the two compartments.
• the savings in processing time are of two types:
• the quantity of rejections can be divided by 5 and 6.
• the pollutant charge COD-DBO-MES is reduced by 70 to 80%.
• Type 2 Dimensions of the tank in m: Total capacity in 1 4: Load in kg in tanning
• Fouloon testing protocol 2508 (preferred embodiment) for cattle skins
• the duration of the complete treatment goes from +/- 24 hours in continuous work to compare against +/- 48 hours for a standard fuller.
• Some tanners can possibly change the number of turns that can vary from 1 to 2 rounds maximum, all according to habits and facilities.
• this work is carried out with a bath ratio of the order of 4 to 6 liters per skin (15 to 20 liters of burr).
• the savings compared to the bunker are for:
• the quality of the wool is higher in this case than in the case of a killer treatment; including the flanks, since the hairs are thus not mixed because of the brewing of the skins in the fuller of the invention.
• the skins come out almost without detangling to perform.
• the tanning is more regular on the surface (incidence for the regularity of dyeing), the skins are very flexible. A very good exhaustion of the food is observed.
• a device for the treatment, tanning and dyeing of skins, comprising a rotary reservoir having a convolution wall and preferably at each of its ends a side wall around a central axis of rotation, the reservoir being designed to receive said skins and at least one treatment liquid, characterized in that said device comprises:
• a second circuit designed to extract at least a portion of the treatment liquid from the reservoir.
• the second circuit is at least partly arranged concentrically to the central axis of rotation.
• the second circuit is secured at least in part to the reservoir and comprises at least one discharge conduit which opens preferably on one side or at one end of the convolution wall.
• the discharge duct extends substantially along part of the circumference of said reservoir and preferably at an angle of at least 90 °.
• the device according to the invention has several discharge conduits each opening on the same side or at the same end on the convolution wall of said tank but at different positions along the circumference of said tank.
• the second circuit comprises a channel arranged concentrically and parallel to the central axis of rotation of the tank.
• the channel of the second circuit extends essentially along the length of the tank.
• the first circuit comprises a supply channel of the treatment liquid and which is arranged concentrically with respect to the central axis.
• the channels of the first and second circuits are concentric, the channel of the first circuit being arranged outside the channel of the second circuit.
• the channel of the second circuit being sealed while the channel of the first circuit being perforated.
• the channel of the first circuit extends substantially along the length of the reservoir and comprises perforations for distributing the treatment liquid all along said reservoir.
• it comprises a filtering device for the treatment liquid, connected between the first circuit and the second circuit.
• the filtering device is disposed statically relative to the rotary tank.
• it comprises a third circuit for discharging and / or injecting air into said tank.
• the reservoir comprises a perforated partition plate which separates the reservoir in two parts and which is arranged so as to be permeable to said treatment liquid and to the dirt or impurities due to the treatment of the skins and which also makes it possible to treat them. to imprison within a first part of the tank but does not allow the passage of said skins in this first part of the tank still present in the second part.
• the second circuit is designed to remove at least a portion of the treatment liquid from the first part of the reservoir.
• the reservoir has a blade of substantially helical shape extending along the reservoir and whose axis of rotation is the central axis of the reservoir. rotation of the reservoir, this blade being fixed to the inner walls of said reservoir so as to separate said reservoir into two compartments, each of the compartments may contain the skins to be treated, preferably half of the skins to be treated.
• the blade performs a rotation of at least 90 ° so that it can push the skins to perform either a vertical movement but rather a horizontal movement.
• the present invention also relates to a process for treating skins and tanning skins using a treatment liquid in which there is a reservoir as described above and in which at least a portion of the liquid treatment is extracted during the rotation of the reservoir with a reinjection of a portion of the treatment liquid.
• the extracted liquid is filtered before being reinjected.
• the extraction of the skins out of the reservoir takes place during the rotation of said reservoir, preferably by reversing the direction of rotation of the reservoir.

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• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Treatment Of Fiber Materials (AREA)

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• 2011
  • 2011-10-10 CN CN201180060095.0A patent/CN103476952B/zh not_active Expired - Fee Related
  • 2011-10-10 WO PCT/BE2011/000058 patent/WO2012048389A2/fr not_active Ceased
  • 2011-10-10 ES ES11794622.8T patent/ES2658914T3/es active Active
  • 2011-10-10 DK DK11794622.8T patent/DK2643486T3/en active
  • 2011-10-10 PT PT117946228T patent/PT2643486T/pt unknown
  • 2011-10-10 EP EP11794622.8A patent/EP2643486B1/de active Active
  • 2011-10-10 NO NO11794622A patent/NO2643486T3/no unknown
  • 2011-10-10 PL PL11794622T patent/PL2643486T3/pl unknown
  • 2011-10-10 BR BR112013008489-8A patent/BR112013008489B1/pt active IP Right Grant
  • 2011-10-10 TR TR2018/02290T patent/TR201802290T4/tr unknown

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