EP3228444A1 - Unité de compression servant à éliminer des liquides - Google Patents

Unité de compression servant à éliminer des liquides Download PDF

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Publication number
EP3228444A1
EP3228444A1 EP16425028.4A EP16425028A EP3228444A1 EP 3228444 A1 EP3228444 A1 EP 3228444A1 EP 16425028 A EP16425028 A EP 16425028A EP 3228444 A1 EP3228444 A1 EP 3228444A1
Authority
EP
European Patent Office
Prior art keywords
roller
path
pressing unit
chamber
unit according
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP16425028.4A
Other languages
German (de)
English (en)
Other versions
EP3228444B1 (fr
Inventor
Ermanno Prati
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Babbini SpA
Original Assignee
Babbini SpA
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 Babbini SpA filed Critical Babbini SpA
Priority to EP16425028.4A priority Critical patent/EP3228444B1/fr
Priority to ES16425028T priority patent/ES2905309T3/es
Publication of EP3228444A1 publication Critical patent/EP3228444A1/fr
Application granted granted Critical
Publication of EP3228444B1 publication Critical patent/EP3228444B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms

Definitions

  • the present invention relates to a pressing unit for removing liquids.
  • water extraction must be performed for example in the sugar sector, with respect to beet pulp, but also with respect to the leaves of this plant and to other complementary products (and also in other industrial sectors).
  • the material of interest is first of all subjected to the action of a press, which performs a sort of mechanical dehydration, removing a first part of the liquid substance; the material is then sent to a drying apparatus, which completes the extraction, obtaining dry mass contents that are per se unattainable by presses.
  • the presses comprise a sort of screw feeder, which comprises a rotating shaft around which an appropriately contoured helical element is wound.
  • the pulp (or other material from which water is to be removed) is thus conveyed toward a forced path, which is delimited by the screw feeder and by a respective containment chamber.
  • the water can thus be evacuated through the walls of the containment chamber, which is appropriately perforated.
  • the shaft is covered by a bent metal plate that is completely perforated: the water can thus pass through said metal plate and flow away into an interspace comprised between the metal plate and the shaft.
  • a press of the last type indicated above therefore has a higher pressing efficiency than the first type described, since it allows the outflow of water not only in a centrifugal direction from the external metal plates of the containment chamber, but also in a centripetal direction, through the interspace between the metal plate and the shaft.
  • the perforated metal plate that covers the shaft ensures higher dehydration efficiency, on the other hand it poses problems that are difficult to solve for press manufacturing companies.
  • the helical element is coupled directly to the perforated metal plate by means of a welding process, but welding performed on a perforated surface is highly subject to the formation of cracks and to the subsequent failure of the shaft or of the metal plate that covers it.
  • the aim of the present invention is to solve the problems described above, by providing a pressing unit that ensures high effectiveness in water removal without renouncing high mechanical strength.
  • an object of the invention is to provide a unit that ensures high pressing efficiencies, though containing (or eliminating) the risk of cracks and failures on the components involved.
  • Another object of the invention is to provide a pressing unit that ensures high reliability in operation and at the same time has low costs.
  • Another object of the invention is to provide a pressing unit that adopts a technical and structural architecture that is alternative to those of units of the known type.
  • Another object of the invention is to provide a pressing unit that can be obtained easily starting from commonly commercially available elements and materials.
  • Another object of the invention is to provide a pressing unit that is safe in application.
  • a pressing unit for removing liquids contained in material of various types comprising a chamber for containing at least one screw feeder, said screw feeder comprising a roller that rotates about its own longitudinal axis and a helical element that is wound in a spiral around said roller, said chamber being affected by an intake port for introducing the material to be pressed and by a discharge port for the pressed material, in order to define a forced pressing path comprised between said chamber and said at least one screw feeder, characterized in that the lateral surface of said roller, which is at least partially hollow, comprises a first portion, which has a helical extension around said axis and is provided with a plurality of holes, for the evacuation of the liquids removed progressively from the material during its advancement along said path, and a second portion, which has a helical extension around said axis and is complementary to said first portion, said helical element being wound around said roller at said second portion, which has a continuous, non-per
  • the reference numeral 1 generally designates a pressing unit, which is preset to remove liquids contained in material of various types.
  • the material from which liquids are extracted by means of the unit 1 is constituted by agroalimentary products of various kinds, supplied to said unit 1 impregnated with water (the liquid to be removed) as a result of previous industrial processes.
  • the unit 1 finds an effective application in the sugar sector, in which the treated material is beet pulp (or also leaves or other complementary materials).
  • the unit 1 is used to remove water or other liquids from other agroalimentary products or byproducts, from fishmeal, alfalfa, waste, biomasses, raw materials and intermediate products of the alternative energy field, or others, without thereby abandoning the protective scope claimed herein.
  • the liquid to removed is preferably water
  • the protection claimed herein is to be understood as extended to the use of the unit 1 also to remove different liquids as a function of the specific practical requirements.
  • the unit 1 therefore comprises a chamber 2 for containing at least one screw feeder 3; in turn, the screw feeder 3 comprises a roller 4, which rotates about its own longitudinal axis A, and a helical element 5, which is wound in a spiral around the roller 4.
  • the chamber 2 is affected by an intake port for introducing the material to be pressed and by a discharge port for the pressed material, so as to define a forced pressing path 6 comprised between the chamber 2 and the screw feeder 3.
  • the ports are not shown in the accompanying figures but can be simple nozzles or openings, provided along the chamber 2 and preferably (but not exclusively) facing end regions of the roller 4, so as to define a path 6 that is extended substantially along the entirety of such roller 4, maximizing the material pressing and expressing capabilities.
  • the lateral surface of the roller 4 which is at least partially hollow, comprises a first portion 4a that has a helical extension around the axis A and has a plurality of holes 7 in order to allow the evacuation of the liquids progressively removed from the material during its advancement along the path 6. Furthermore, the lateral surface of the roller 4 comprises a second portion 4b, which also has a helical extension around the axis A and is complementary to the first portion 4a. The second portion 4b instead has a continuous non-perforated shape and indeed the helical element 5 is wound around the roller 4 at this second portion.
  • the lateral surface of the roller 4 (the one that in practice delimits the path 6, together with the chamber 2 and the helical element 5) comprises two portions 4a, 4b, which are extended with a helical shape in a mutually parallel manner and define together the entire lateral surface (or at least a main segment thereof).
  • the helical element 5 is welded to the roller 4 at the second portion 4b, and indeed the choice to keep the second portion 4b of the lateral surface of the roller 4 continuous and without holes 7 ensures optimum welding, avoiding or at least reducing the risk of cracks and failures, during the normal operation of the unit 1 and/or in case of abnormal stresses, possibly of excessive intensity.
  • both the roller 4 and the chamber 2 are made of metal plate.
  • At least the side walls of the chamber 2, interposed between the ports have a plurality of orifices, so as to ensure the evacuation of the liquids progressively removed from the material during its advancement along the path 6 through said orifices as well.
  • the water can abandon the path 6 both through the holes 7 in the first portion 4a and through the orifices along the chamber 2.
  • the roller 4 has a substantially cylindrical shape, while the helical element 5 has a pitch that at least partially decreases (on at least one segment of the roller 5) if measured along the path 6 from the intake port to the discharge port.
  • This choice allows to obtain the progressive reduction of the volume available to the material during its advancement along the forced path 6 in order to obtain, as already anticipated, the pressing of such material.
  • the protective scope claimed herein includes a second constructive solution, in which the roller 4 has a substantially conical shape, with a progressively increasing transverse cross-section, if measured along the path 6 from the intake port to the discharge port.
  • the helical element 5 therefore has an at least partially constant pitch (on at least one segment of the roller 5) or even a slightly decreasing pitch, if measured along the path 6 from the intake port to the discharge port, achieving again the progressive reduction of the volume available to the material during its advancement along the forced path 6.
  • chambers 2 having a conical or cylindrical shape, in any case shaped substantially complementarily to the shape and transverse space occupation of the helical element 5, so as to delimit fully the path 6, are conveniently adopted.
  • the chamber 2 accommodates two screw feeders 3, each of which comprises a respective roller 4 and a corresponding helical element 5.
  • the rollers 4 are substantially side by side and delimit, with the helical elements 5 and the chamber 2, a single forced path 6.
  • the two screw feeders 3 can be arranged so that the turns of the helical element 5 of one screw feeder 3 enter, during rotation, the space comprised between two consecutive turns of the helical element 5 of the other screw feeder 3, and viceversa.
  • the axis A of the roller 4 (of each roller 4) has an orientation selectively among a horizontal orientation, a vertical orientation and an inclined orientation (i.e., forming an angle comprised between 0° and 90° with the horizontal plane on which the entire unit 1 rests).
  • the roller 4 is constituted substantially by a shaft, which rotates about the axis A and is internally hollow, so as to define an internal duct, which is indeed connected to the path 6 through the holes 7, for the evacuation of the liquids removed from the material.
  • the liquid expressed from the material that passes through the holes 7 flows outside the unit 1 through the duct (arranged along the axis A) that is defined inside the shaft.
  • the roller 4 is instead constituted substantially by a sleeve for the coaxial covering of a shaft, which rotates about the axis A.
  • an interspace is defined between the sleeve and the shaft and is connected to the path 6 through the holes 7 in order to evacuate the liquids removed from the material (i.e., performing the role that in the other practical option is assigned to the internal duct of the shaft).
  • the dimensional and geometric parameters of the helical shape of the portions 4a, 4b of the lateral surface of the roller 4 correspond to the material that is intended to pass through the forced path 6 and/or to the desired residual liquid content present in the material at the discharge port.
  • the material to be pressed can be introduced in the chamber 2 through the intake port, which leads directly to the forced path 6, which is delimited by the screw feeder 3 and by the chamber 2 proper.
  • the water (or other liquid) that is removed progressively can then abandon the chamber 2 through the holes 7 provided along the first portion 4a of the lateral surface of the roller 4 and preferably also through the orifices defined along the side walls of the chamber 2.
  • the large filtering area available to the water ensures extremely high draining efficiencies and therefore better performance, which is assuredly of interest for users.
  • the choice to weld or otherwise fix the helical element 5 to the roller 4 at the second portion 4b, which is not perforated, of its lateral surface ensures high mechanical strength, overcoming the problems of the background art, in which the helical elements welded to the perforated metal plates are subject to cracks (indeed at the weld) in case of abnormal mechanical stresses or frictions on the helical elements, with consequent failure of the shaft.
  • Partial perforation (only on the second portion 4b) therefore allows the unit 1 to achieve a high increase in reliability without reducing the draining effect, since the area offered for draining (composed by the first portion 4a and preferably also by the side walls of the chamber 2) is in any case maximum.
  • the higher mechanical reliability of the roller 4 further allows to utilize its potential more: for example, it is possible to reduce the rotation rate and increase the final content of dry substance in the pressed material, at the same time reducing machine downtimes, as well as maintenance interventions and inspections.
  • the pressing unit according to the invention achieves fully the intended aim, since by adopting a roller that has a first portion with a helical shape provided with a plurality of holes and a second helical portion that is complementary to the first portion and is not perforated and around which the helical element is wound it is possible to achieve a high effectiveness in water removal without renouncing high mechanical strength.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)
EP16425028.4A 2016-04-04 2016-04-04 Unité de compression servant à éliminer des liquides Active EP3228444B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16425028.4A EP3228444B1 (fr) 2016-04-04 2016-04-04 Unité de compression servant à éliminer des liquides
ES16425028T ES2905309T3 (es) 2016-04-04 2016-04-04 Unidad de prensado para eliminar líquidos

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16425028.4A EP3228444B1 (fr) 2016-04-04 2016-04-04 Unité de compression servant à éliminer des liquides

Publications (2)

Publication Number Publication Date
EP3228444A1 true EP3228444A1 (fr) 2017-10-11
EP3228444B1 EP3228444B1 (fr) 2021-12-22

Family

ID=56092861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16425028.4A Active EP3228444B1 (fr) 2016-04-04 2016-04-04 Unité de compression servant à éliminer des liquides

Country Status (2)

Country Link
EP (1) EP3228444B1 (fr)
ES (1) ES2905309T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4046788A1 (fr) * 2021-02-19 2022-08-24 Babbini S.P.A. Presse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191126750A (en) * 1911-11-29 1912-03-14 Robert Hanson Apparatus for Drying or Expressing Liquid from Tan Waste and other Plastic Materials.
EP0930152A1 (fr) * 1998-01-15 1999-07-21 Lionello Babbini Presse à vis pour la déshydratation de produits humides
WO2003031166A1 (fr) * 2001-10-10 2003-04-17 Stord International Ass Pressoir a vis, pressage de substance chargee de liquide, et mode d'utilisation
US20040035804A1 (en) * 2000-08-04 2004-02-26 Rudolf Bischof Separating device for separating fluids from solids and use thereof
WO2004080704A1 (fr) * 2003-03-14 2004-09-23 Atlas-Stord Denmark A/S Presse a vis comprenant une partie cylindrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191126750A (en) * 1911-11-29 1912-03-14 Robert Hanson Apparatus for Drying or Expressing Liquid from Tan Waste and other Plastic Materials.
EP0930152A1 (fr) * 1998-01-15 1999-07-21 Lionello Babbini Presse à vis pour la déshydratation de produits humides
US20040035804A1 (en) * 2000-08-04 2004-02-26 Rudolf Bischof Separating device for separating fluids from solids and use thereof
WO2003031166A1 (fr) * 2001-10-10 2003-04-17 Stord International Ass Pressoir a vis, pressage de substance chargee de liquide, et mode d'utilisation
WO2004080704A1 (fr) * 2003-03-14 2004-09-23 Atlas-Stord Denmark A/S Presse a vis comprenant une partie cylindrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4046788A1 (fr) * 2021-02-19 2022-08-24 Babbini S.P.A. Presse

Also Published As

Publication number Publication date
ES2905309T3 (es) 2022-04-07
EP3228444B1 (fr) 2021-12-22

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