WO2022029569A1 - Installation industrielle de foulage de cuir ayant un impact environnemental amélioré - Google Patents

Installation industrielle de foulage de cuir ayant un impact environnemental amélioré Download PDF

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Publication number
WO2022029569A1
WO2022029569A1 PCT/IB2021/056893 IB2021056893W WO2022029569A1 WO 2022029569 A1 WO2022029569 A1 WO 2022029569A1 IB 2021056893 W IB2021056893 W IB 2021056893W WO 2022029569 A1 WO2022029569 A1 WO 2022029569A1
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WO
WIPO (PCT)
Prior art keywords
air
plant
closed circuit
hollow body
downstream
Prior art date
Application number
PCT/IB2021/056893
Other languages
English (en)
Inventor
Antonio Galiotto
Original Assignee
Erretre S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erretre S.P.A. filed Critical Erretre S.P.A.
Priority to EP21759140.3A priority Critical patent/EP4192983A1/fr
Priority to CN202180056029.XA priority patent/CN116113715A/zh
Publication of WO2022029569A1 publication Critical patent/WO2022029569A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B3/00—Milling leather
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/40—Softening or making skins or leather supple, e.g. by staking, boarding, or crippling machines, by dry mills
    • C14B1/42—Softening or making skins or leather supple, e.g. by staking, boarding, or crippling machines, by dry mills by means of a rotatable drum with radial blades
    • 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

Definitions

  • the present invention relates to an industrial milling plant for tannery leathers, or similar flexible and special laminar surfaces, having an environmental impact more improved than the prior art plants since it is provided with a depuration system of the odor of the air released from the rotating drum belonging to the plant in which the leathers are treated by means of water and/or dedicated chemical products.
  • milling means the treatment of leathers in a machine, known as “drum”, performed to prepare the leathers for tanning and to subject them to the processes of tanning, dyeing or greasing.
  • the parameters of a milling cycle recipe comprise: temperature inside the rotating milling drum and consequently, relative humidity.
  • a milling cycle which, however, further comprises other parameters such as operating speed (i.e., rotation speed) of the drum, total time of the milling cycle, chemical products introduced into the drum, and type of leathers treated in the drum, purity level of the air introduced into the drum and so on.
  • milling is a mechanical type process which is carried out on any type of special fabric - generally, animal leathers - to give the product the appearance of aging or wrinkling, make it softer and eliminate any creases present and thus prepare it for the next processing steps.
  • the material is subjected to mechanical action due to its rolling inside the basket or hollow cylindrical drum (often perforated), which constitutes the main part of the machine (or drum) and which materially operates by rotating around a transversal, usually horizontal, axis.
  • the material inside the cylindrical basket (or drum) can be conditioned by air subjected to predetermined temperature and humidity conditions.
  • a known milling plant for leathers to be subjected to a simple fulling operation (the latter term is commonly used in the tanning industry to indicate the leather processing aimed at softening it by mechanical shaking inside the drum under regulated temperature and humidity conditions) comprises a milling drum which, in turn, comprises a substantially cylindrical hollow body adapted to be put into rotation about a symmetry axis by means of motorized means and in which the leathers to be treated are received.
  • a plant for milling leathers of known type further comprises a closed circuit (in the form of one or more pipes), operatively connected to the cylindrical and rotating hollow body of the milling drum for letting air in and out from the hollow body itself for treating the leathers.
  • a closed circuit in the form of one or more pipes
  • a typical milling plant for leathers of the prior art comprises a dust collector for cleaning the air, arranged outside the cylindrical hollow body of the milling drum from which it receives air and downstream of the hollow body following, as a conventional reference direction, the air path within the closed circuit, as well as forced ventilation means, such as a fan, arranged downstream of the dust collector following, as a reference direction, the air path within the closed circuit.
  • a common milling plant of the prior art includes at least one exchange valve arranged downstream of the forced ventilation means following, as a reference direction, the air path inside the closed circuit, and a group of electrical resistors, arranged downstream of the exchange valve and outside the cylindrical hollow body, again following the air path inside the closed circuit as a reference direction.
  • the dust collector is mounted outside the milling drum, immediately downstream of the outlet of the cylindrical hollow body which distinguishes the latter, and provides a generic purification system of the air leaving the hollow body itself which, in general, is of the filtering sleeves (or bags) type supported by a supporting structure and enclosed by an outer casing which inhibits uncontrolled access by anyone (unless of course the component parts are disassembled).
  • the filter sleeves are notoriously used for dry and liquid industrial dust collection, by means of the separation of particles, dust, or impurities (above all residues of the leathers being processed in the rotating drum) in suspension in the air, by virtue of the materials with which they are made and which range, for example, from polyester to polypropylene, cotton, wool-nylon compound or technical fabrics.
  • the impurities in the air which enters into the filtering sleeves of the dust collector progressively stick to the inner wall of the sleeves themselves and from here they decant by gravity downwards until they accumulate in a removable collection box located in the lower part of the dust collector and accessible by the operator.
  • the filtering sleeves are subjected to maintenance in the factory (this is possible, as mentioned, only by removing the outer casing of the dust collector) periodically, generally once a week or every ten to fifteen days according to the operational choices, while the removable collection drawer is emptied more frequently, even two or three times a week.
  • the negative fact persists that the air exiting firstly from the drum and then from the dust collector still has a pungent and unpleasant odor and still contains finer and residual volatile substances, substantially molecules produced by the leather processing, which continue to recirculate in the closed circuit and, thus, negatively introduced into the rotating drum again, except when the exchange valve, downstream the ventilation means, is opened, which disperses the substances into the environment (either outside or inside a building), however together with the odor.
  • the foul odor which is produced by the processing of leathers inside the rotating milling drum permeates the leathers themselves to the extent that they carry the odor with them even after the numerous and successive processing steps carried out in the tanning industry and until they are applied to the finished manufactured item (such as a sofa or a car seat) and the latter is used in domestic or closed environments (such as e.g. the living room of a house or the passenger compartment of a car).
  • the present invention suggests to remedy the aforesaid disadvantages starting from the awareness of the aforesaid drawbacks suffered by the prior art considered hereto.
  • the industrial leather milling plant of the invention can improve, with respect to the background art, the quality of the air circulating within the closed circuit belonging to it, as well as of the environment into which the air is periodically expelled.
  • the air circulating in the closed circuit of the plant is treated downstream of the milling drum and, therefore, coming from and exiting the rotating hollow body (cylindrical or octagonal) of the milling drum in which the mechanical processing and conditioning of the leathers takes place.
  • the industrial leather milling plant of the invention comprises additional means for purifying, deodorizing, disinfecting, depurating, or sanitizing the air, arranged outside the hollow body of the milling drum, in line with the closed circuit and externally downstream of the dust collector, operatively connected to actuation means adapted to activate such additional purification means not only to reduce but also to almost totally eliminate the unwholesome and unpleasant odor which accompanies the air coming from the milling drum in which it was permeated by the odor emanating from the animal leathers being processed.
  • the industrial leather milling plant of the present invention offers more pleasant working conditions to the operators of the production plant in which the plant is installed, precisely by virtue of the substantial elimination of the odor of the air circulating in the plant and emitted into the environment.
  • the industrial leather milling plant of the present invention is also more respectful of the environment outside the factory in which the plant itself is installed, because this external environment is also positively affected by the innovation resulting from the invention which ensures air in which the typical odor resulting from the processing of leathers is practically absent or present in an irrelevant quantity.
  • the industrial leather milling plant with an improved environmental impact of the invention also favors a greater sanitization, depuration, or deodorization of the leathers than that offered by the technologies of the prior art, so that the finished items (such as a car seat or a sofa, an armchair or a house chair) also obtained with leathers are substantially free from the typical and unpleasant residual odor which, at least on an emotional level, impacts the opinion of the quality of the leather to be worked received and purchased from the tanning company expressed by the manufacturer of such finished manufactured item (and also by the final retailer).
  • the additional purification means present in the industrial leather milling plant of the invention allow a favorable overall disinfection of the component elements of the plant, especially of the milling drum housing the treatment of the leathers.
  • FIG. 1 is a diagrammatic and exemplified side view of a first variant embodiment of the plant for milling leathers of the invention
  • FIG. 2 is a diagrammatic and exemplified side view of a second variant embodiment of the leather milling plant of the invention
  • FIG. 3 is a diagrammatic and exemplified side view of a third variant embodiment of the leather milling plant of the invention.
  • FIG. 4 is a diagrammatic and exemplified side view of a fourth variant embodiment of the leather milling plant of the invention.
  • FIG. 1 A first embodiment of the industrial leather milling plant of the invention is illustrated in figure 1 where it is indicated as a whole by the reference numeral 1 .
  • the industrial milling plant 1 comprises:
  • a milling drum 2 comprising a hollow body 3 (for instance cylindrical or octagonal), which is rotated around a symmetry axis X (usually horizontal) by means of motorization (not shown for the sake of simplicity) and inside which the leathers to be treated are received by mechanical shaking to soften them; - a closed circuit 4, operatively connected to the hollow body 3 of the milling drum 2 to allow the introduction of air A into and out from the hollow body 3, which air is useful for the aforesaid, so-called fulling treatment of the leathers;
  • a dust collector 5 to clean the air A from the particles, impurities, or volatile dust released by the leathers, arranged outside the hollow body 3 of the milling drum 2 from which it receives the air A and downstream of the hollow body 3 following, as a hypothetical or conventional reference direction, the path made by the air A inside the closed circuit 4;
  • - forced ventilation means indicated as a whole by reference numeral 6 and comprising, for example, a fan, arranged downstream the dust collector 5 following, as a reference direction, the air path A inside the closed circuit 4;
  • the industrial milling plant 1 for leathers with an improved environmental impact of the invention comprises additional purification means of the air A, indicated as a whole by the reference numeral 9, arranged outside the hollow body 3 of the milling drum 2, in line on the closed circuit 4 and externally and conveniently downstream the dust collector 5, operatively connected to actuation means (not shown) adapted to activate the additional purification means 9 to at least reduce the unwholesome and however unpleasant odor which accompanies the air A coming from said milling drum 2.
  • the dust collector 5 is of the classical type with filtering sleeves (or bags) 10, 11 (generally two) for the collecting the dust of gaseous currents, made of material with clinging or holding capacities chosen by the group consisting of the fabric of natural and/or manmade fibers (e.g., in the materials already identified above) in staple, continuous thread or monofilament, felt form or similar materials and, in its lower part 5a, comprises a removable collection box 12 in which particles, impurities or volatile dust P of the leathers accumulate, initially suspended in the air A captured by the inner wall 10a, 11 a of the respective filtering sleeves 10, 11.
  • the additional purification means 9 of the air A comprise an ozonator 13 arranged within a conveying pipe (only diagrammatically shown in the attached drawing table 1/1 , wherein it is indicated by reference numeral 14) of the air A belonging to the closed circuit 4.
  • the ozonator 13 comprises any of the ozone generators selected by the group consisting of corona-effect generators (the preferred and best performing solution in the industrial application of the present invention), cell generators, ultraviolet lamps, electrolysis cells and/or combinations thereof.
  • corona-effect generators the preferred and best performing solution in the industrial application of the present invention
  • cell generators the preferred and best performing solution in the industrial application of the present invention
  • ultraviolet lamps the preferred and best performing solution in the industrial application of the present invention
  • electrolysis cells electrolysis cells and/or combinations thereof.
  • Figure 1 shows the additional purification, depuration, sanitization or disinfection means 9 are also, in general, installed upstream the electrical resistor 8; in this case, particularly, they’re installed upstream the forced ventilation means 6.
  • the additional air purification means may comprise a number of ozonators higher than one, according to the design choices, installed as desired on the closed circuit and in any case upstream of the electrical resistor and downstream of the dust collector.
  • the specific installation of the ozonator 13 downstream of the dust collector 5 - to be understood as outside of the load-bearing casing 15 in which the filter sleeves 10, 11 are housed - provided in the industrial plant 1 of the invention is convenient because it prevents the ozone thus produced from being negatively and inefficiently absorbed or consumed by the dust, particles or impurities P which are separated from the air by the filter sleeves 10, 11 in the dust collector 5.
  • the ozonator 13 absorbs, degrades, or breaks down the volatile organic substances (or charges) (such as odor) - much finer than dust, particles, or impurities P - present in form of molecules in the air A.
  • providing the ozonator 13 has the advantage of allowing ozone to be produced directly on-site and only when needed, required, or scheduled and to act effectively against bacteria, viruses, and mold in the air A itself.
  • the constructive solution shown in figure 1 is thus the preferred and most suitable constructive solution of the invention among those available and in any case functional, especially in relation to the technical problem that the invention itself intends to solve, providing the detection means 9 almost immediately upstream of the electrical resistor 8 and not far from the dust collector 5, thus effectively fulfilling a need for balancing two at least partly conflicting positions.
  • the concentration of ozone produced by the ozonator 13 depends on the power of the electrochemical cell which generates it, but it can also be increased by increasing the concentration of oxygen in the air which crosses through the cell itself; this can be achieved essentially in two different manners: the first by blowing oxygen near the electrochemical cell, the second by generating oxygen by chemical reaction near the cell itself. Typically, therefore, it is either an organic or inorganic reaction capable of developing gaseous oxygen, respectively.
  • the actuating means comprise a central processing and control unit, not shown for the sake of presentation simplicity, electrically connected to the additional purification means 9 of air A to manage the operational, activation, and deactivation cycles thereof, and which, more generally, manages the operation of the industrial plant 1 as a whole, also storing the processed data.
  • the actuating means comprise a central processing and control unit, not shown for the sake of presentation simplicity, electrically connected to the additional purification means 9 of air A to manage the operational, activation, and deactivation cycles thereof, and which, more generally, manages the operation of the industrial plant 1 as a whole, also storing the processed data.
  • FIG 2 shows a further variant embodiment of the invention in which the industrial leather milling plant, now indicated as a whole by reference numeral 50, differs from the previous one indicated by reference numeral 1 only for the position of the additional purification or depuration means, indicated as a whole by reference numeral 59, on the closed circuit 54; indeed, in this case, while remaining upstream of the electrical resistor 58, the additional purification means 59 are installed downstream not only simply of the dust collector 55 but also of the forced ventilation means 56 and upstream of the exchange valve 57.
  • the additional purification means 59 (such as an ozonator 60) are installed between the forced ventilation means 56 and the exchange valve 57; this alternative construction is also very advantageous and useful for achieving the predetermined objects of the present invention.
  • FIG 3 Another solution idea of the invention is shown in figure 3, in which the industrial leather milling plant, now indicated as a whole by reference numeral 100, differs from those already described above, respectively indicated by reference numerals 1 and 50, only for the position of the additional purification means, indicated as a whole by reference numeral 109, on the closed circuit 104; indeed, in this case, the additional purification means 109 of the air A are installed upstream of the electrical resistor 108 and downstream also of the exhaust valve 107 and not only just of the dust collector 105 and the forced ventilation means 106.
  • figure 4 shows a further constructive solution of the invention in which the industrial leather milling plant with an improved environmental impact, now indicated as a whole by reference numeral 150, differs from the three industrial plants 1 , 50, and 100 described above again for the position of the additional purification means, indicated as a whole by reference numeral 159, which in this case are installed downstream of the electrical resistor 158 and upstream of an inlet 160 of the hollow body 153 of the milling drum 152.
  • This variant embodiment of the invention is also suitable, in particular, for assessing whether particles, dusts or impurities of any kind enter the closed circuit 154 and the hollow body 153 of the milling drum 102 from the outside, and, if necessary, provide the at least partial purification or sanitization of those entering, although such a solution of the invention appears the least suitable for the technical problem that the invention suggests to overcome.
  • the industrial leather milling plant with an improved environmental impact of the invention allows obtaining odorless leather, with consequent positive effects downstream, such as in particular the satisfaction of the final customer (intended as the person who buys the tanned leather and processes it to obtain finished manufactured items, such as, above all, car seats and furniture, not excluding, however, leather shoes and fashion accessories, such as bags and suitcases).
  • the additional air purification means can be arranged in several points along the closed circuit, again respecting the essential requirement provided for by the characterizing part of the original claim 1 attached (according to which the additional purification means are arranged outside the rotating hollow body of the milling drum and externally downstream of the dust collector); in such cases, in which the level of air deodorization will be maximum or in any case strongly elevated, the industrial leather milling plant with an improved environmental impact of the present invention will appear as one of the possible combinations of the embodiment versions described above and shown in the accompanying figures.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

La présente invention concerne une installation industrielle de foulage (1 ; 50 ; 100 ; 150) destinée aux cuirs de tannerie ayant un impact environnemental amélioré comprenant un tambour de foulage (2 ; 152) comprenant un corps creux (3 ; 153), adapté pour tourner autour d'un axe de symétrie (X) à travers un moyen de motorisation et à l'intérieur duquel les cuirs à traiter sont reçus, un circuit fermé (4 ; 54 ; 104 ; 154), fonctionnellement relié au corps creux (3 ; 153) du tambour de foulage (2 ; 152) pour laisser l'air (A) entrer le corps creux (3 ; 153) et provenir de celui-ci de manière à traiter les cuirs, un collecteur de poussière (5 ; 55 ; 105) disposé à l'extérieur et en aval du corps creux (3 ; 153) du tambour de foulage (2 ; 152) suivant, en tant que sens de référence, le trajet de l'air (A) à l'intérieur du circuit fermé (4 ; 54 ; 104 ; 154), un moyen de ventilation forcée (6 ; 56 ; 106), disposé en aval du collecteur de poussière (5 ; 55 ; 105) encore une fois suivant, en tant que sens de référence, le trajet de l'air (A) à l'intérieur du circuit fermé (4 ; 54 ; 104 ; 154), au moins une vanne d'échange (7 ; 57 ; 107) disposée en aval du moyen de ventilation forcée (6 ; 56 ; 106) suivant, en tant que sens de référence, le trajet de l'air (A) à l'intérieur du circuit fermé (4 ; 54), et une ou plusieurs résistances électriques (8 ; 58 ; 108 ; 158), disposées en aval de ladite vanne d'échange (7 ; 57 ; 107), encore une fois suivant, en tant que sens de référence, le trajet de l'air (A) à l'intérieur du circuit fermé (4 ; 54 ; 104 ; 154). En particulier, l'installation industrielle de foulage (1 ; 50 ; 100 ; 150) de cuir de l'invention comprend un moyen de purification additionnel (9 ; 59 ; 109 ; 159) de l'air (A), disposé à l'extérieur du corps creux (3 ; 153) du tambour de foulage (2 ; 152), dans la ligne sur le circuit fermé (4 ; 54 ; 104 ; 154) et au plan externe en aval du collecteur de poussière (5 ; 55 ; 105), fonctionnellement relié au moyen d'actionnement qui active le moyen de purification additionnel (9 ; 59 ; 109 ; 159) pour au moins réduire l'odeur désagréable accompagnant l'air (A) provenant du tambour de foulage (2 ; 152).
PCT/IB2021/056893 2020-08-07 2021-07-29 Installation industrielle de foulage de cuir ayant un impact environnemental amélioré WO2022029569A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21759140.3A EP4192983A1 (fr) 2020-08-07 2021-07-29 Installation industrielle de foulage de cuir ayant un impact environnemental amélioré
CN202180056029.XA CN116113715A (zh) 2020-08-07 2021-07-29 具有改善环境影响的工业皮革摔软设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102020000019624A IT202000019624A1 (it) 2020-08-07 2020-08-07 Impianto industriale di bottalatura di pelli a migliorato impatto ambientale
IT102020000019624 2020-08-07

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Publication Number Publication Date
WO2022029569A1 true WO2022029569A1 (fr) 2022-02-10

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PCT/IB2021/056893 WO2022029569A1 (fr) 2020-08-07 2021-07-29 Installation industrielle de foulage de cuir ayant un impact environnemental amélioré

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EP (1) EP4192983A1 (fr)
CN (1) CN116113715A (fr)
IT (1) IT202000019624A1 (fr)
WO (1) WO2022029569A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023242166A1 (fr) * 2022-06-15 2023-12-21 Renbertech S.R.L. Machine de traitement du cuir et des tissus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2081303A (en) * 1980-08-08 1982-02-17 Dose Ludwig Softening leather
EP0960948A1 (fr) * 1998-05-27 1999-12-01 ERRETRE s.r.l. Tonneau de foulonnage, teinture et tannage
EP1690950A2 (fr) * 2005-02-15 2006-08-16 Erretre S.p.A. Pour le foulage, la teinture et le retannage
WO2018172837A1 (fr) * 2017-03-23 2018-09-27 Erretre S.P.A. Tambour amélioré pour le traitement de cuirs par foulage

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Publication number Priority date Publication date Assignee Title
CN101069752A (zh) * 2002-05-20 2007-11-14 西奥多·A·M·阿尔茨 空气净化装置
GB0316837D0 (en) * 2003-07-18 2003-08-20 Hallam David R Ozone generating air cleaning device
CN203458963U (zh) * 2013-06-05 2014-03-05 北京华创朗润环境科技有限公司 工业废气净化装置
CN107034325B (zh) * 2017-06-07 2019-10-29 浙江中辉裘革科技有限公司 一种用于皮革补充染色的装置
CN107190109B (zh) * 2017-06-30 2019-05-17 海宁瑞星皮革有限公司 一种皮革染色转鼓
DE102018131624A1 (de) * 2018-12-10 2020-06-10 Tfl Ledertechnik Gmbh Vorrichtung, Wechseleinheit, Kit und Verfahren zur Geruchsreduzierung von gegerbtem Leder
CN211079197U (zh) * 2019-08-27 2020-07-24 江苏优贝斯新材料科技有限公司 一种皮革制作用烘干装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2081303A (en) * 1980-08-08 1982-02-17 Dose Ludwig Softening leather
EP0960948A1 (fr) * 1998-05-27 1999-12-01 ERRETRE s.r.l. Tonneau de foulonnage, teinture et tannage
EP1690950A2 (fr) * 2005-02-15 2006-08-16 Erretre S.p.A. Pour le foulage, la teinture et le retannage
WO2018172837A1 (fr) * 2017-03-23 2018-09-27 Erretre S.P.A. Tambour amélioré pour le traitement de cuirs par foulage

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IT202000019624A1 (it) 2022-02-07
CN116113715A (zh) 2023-05-12
EP4192983A1 (fr) 2023-06-14

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