EP2517868A1 - Procédé de contrôle d'une presse à agglomérer - Google Patents

Procédé de contrôle d'une presse à agglomérer Download PDF

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Publication number
EP2517868A1
EP2517868A1 EP11164249A EP11164249A EP2517868A1 EP 2517868 A1 EP2517868 A1 EP 2517868A1 EP 11164249 A EP11164249 A EP 11164249A EP 11164249 A EP11164249 A EP 11164249A EP 2517868 A1 EP2517868 A1 EP 2517868A1
Authority
EP
European Patent Office
Prior art keywords
rollers
pellet mill
controlling
die
roller
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.)
Withdrawn
Application number
EP11164249A
Other languages
German (de)
English (en)
Inventor
Jesper Blok
Tomas Kiré Hørdum
Steen G. Lassen
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Priority to EP11164249A priority Critical patent/EP2517868A1/fr
Priority to PT127189629T priority patent/PT2701899E/pt
Priority to BR112013027359-3A priority patent/BR112013027359B1/pt
Priority to CN201280021303.0A priority patent/CN103717385B/zh
Priority to BR112013027444-1A priority patent/BR112013027444B1/pt
Priority to RU2013153092/02A priority patent/RU2557858C2/ru
Priority to US14/114,722 priority patent/US9616605B2/en
Priority to CN201280021302.6A priority patent/CN103687719B/zh
Priority to US14/114,691 priority patent/US20140138865A1/en
Priority to CA2834120A priority patent/CA2834120C/fr
Priority to CA2834181A priority patent/CA2834181C/fr
Priority to EP12717300.3A priority patent/EP2701898A1/fr
Priority to PCT/EP2012/057726 priority patent/WO2012146699A1/fr
Priority to PCT/EP2012/057723 priority patent/WO2012146696A1/fr
Priority to RU2013152963/02A priority patent/RU2550468C1/ru
Priority to CA2834119A priority patent/CA2834119C/fr
Priority to EP12723395.5A priority patent/EP2701900B1/fr
Priority to CN201280021304.5A priority patent/CN103702824B/zh
Priority to PCT/EP2012/057727 priority patent/WO2012146700A1/fr
Priority to EP12718962.9A priority patent/EP2701899B1/fr
Priority to RU2013152962/02A priority patent/RU2563395C2/ru
Priority to BR112013027404A priority patent/BR112013027404A2/pt
Publication of EP2517868A1 publication Critical patent/EP2517868A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements
    • B30B11/006—Control arrangements for roller presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/20—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring
    • B30B11/201—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring for extruding material

Definitions

  • the present invention pertains to a method of controlling a pellet mill, said pellet mill comprising a number of rollers mounted inside a cylindrical die for pressing material to be pelletized through perforations provided in said cylindrical die.
  • the pellet mill further comprises one or more adjustment mechanisms for adjusting the distance between the rollers and the die, and a drive mechanism for rotationally driving the die and rollers
  • the rollers are driven by the friction between the die, the material to be pelletized and the rollers and the drive mechanism thus merely drives the die.
  • Such reduced friction may be due to increased content of water, oil or other variations in the material to be pelletized and result in slip between roller and die, which results in less or no material being pelletized
  • further material feed to the process will result in an overfilled pellet mill and activation of the above-mentioned safety mechanism or similar stopping of the process.
  • the above-mentioned and further objects are obtained by the controlling method comprising the steps of providing a measurement of a parameter, said parameter indicating if an overload of the pellet mill is arising and in case of such indication being detected, reducing the load on the pellet mill by suitable countermeasures.
  • the parameter measurement can be a measurement of the rotational speed of the die and the rollers, respectively, and subsequent calculation of the slip between the rollers and the die, i.e the difference between the peripheral speed of the rollers and the die, respectively. Whenever such calculated slip exceeds a predefined limit, this can be taken as an indication of an overload of the pellet mill In a simplified version, the predefined limit could be such that measurement of the rotational speed of the rollers will be sufficient and non-rotation would be taken as the indication of overload.
  • the position of the rollers may be controlled by means of an adjustment mechanism, e.g in the form of hydraulic piston cylinder units and the position is measured, typically by the physical position of said hydraulic piston cylinder unit.
  • an adjustment mechanism e.g in the form of hydraulic piston cylinder units and the position is measured, typically by the physical position of said hydraulic piston cylinder unit.
  • the position of the rollers is controlled to a predetermined distance between roller and die and the forces available for the adjustment mechanism is limited, in the case of a hydraulic system, by limiting the hydraulic pressure available, whereby the rollers will give way if larger forces are necessary for maintaining the position of the rollers and accordingly, such yield of a roller leading to non-maintenance of the predetermined distance between roller and die, can be taken as an indication of an overload of the pellet mill
  • this yield of a roller will allow part of the material to be pelletized to be transported to the next following roller, where it may be pressed through the die.
  • the limitation of the available forces for the adjustment mechanism also limits the possible unbalance between the rollers and thus the strain on the structural parts of the pellet mill.
  • the forces available for the adjustment are limited to a level equal to the level necessary for keeping the position under normal conditions plus a predefined value, preferably e.g. 10% thereof
  • the suitable countermeasures for reducing the load on the pellet mill may comprise one or more of the following:
  • the measurements of the positions of the individual rollers are used in a closed loop control for the positions of the rollers. It is furthermore preferred that an individual position control is performed and in connection with the slip measurement for the individual roller, individual initiation of countermeasures is performed for each of the rollers.
  • the pellet mill shown in Fig 1 is provided with suitable means for measuring relevant parameters for providing a control on the pellet mill
  • the figure shows means 8,9,10 for measurement of the individual positions x,y,z of the rollers of the pellet mill 11,12,13,14 and for measuring the rotational speed w 1 . w 2 , w 3 , w 4 of the individual rollers and the die.
  • Various possibilities for performing the position measurements could be simple linear position detectors, rotational position detectors or, in case of hydraulic drive for controlling the position of the rollers, hydraulic fluid volume measurement, measuring the amount of hydraulic fluid delivered to the hydraulic cylinders for controlling the position of the rollers.
  • the measurement of the rotational speed of rollers and die, respectively, may be performed by means of optical sensors, inductive sensors, etc
  • the controller shown in Fig 1 is provided for converting the above-mentioned measurements to commands a,b,c for controlling the valves 17,18,19 controlling the positions x,y,z of the adjustment mechanisms for the roller position, e.g. in the form of double-acting hydraulic cylinder-piston units 5,6,7.
  • Such adjustment mechanisms may furthermore comprise the provision of eccentrically supported axles for the rollers, said eccentrically supported axles being rotated by means of the adjustment mechanism connected thereto.
  • the controller is able to control the drive motor M 4 for the die, the individual material supply motors M 1 , M 2 , M 3 supplying material for the individual rollers, if present, and possibly, again if present, drive motors for the individual rollers (not shown)
  • a hydraulic supply 16 is provided.
  • the hydraulic supply 16 is preferably provided with a maximum pressure restriction, whereby the maximum force available for keeping the rollers in a desired position has been limited.
  • Corresponding limitation of the maximum force can naturally also be provided in connection with other types of adjustment drive mechanisms, such as electrical drive mechanisms,
  • Figure 2 shows the motor M 4 for driving the die 1 and a number of motors M 1 , M 2 , M 3 for supply of material to the pellet mill.
  • individual motors for supply of material to individual rollers of the pellet mill are provided, in order to be able to provide individual control of supply of material and individual initiation of countermeasures in accordance with the present invention.
  • the motor control for driving the die may include a frequency converter for adjustable rotational speed of the die This provides the possibility of adjusting the set point for the rotational speed of the die, in order to offer the possibility of maximizing the output of the pellet mill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Glanulating (AREA)
EP11164249A 2011-04-29 2011-04-29 Procédé de contrôle d'une presse à agglomérer Withdrawn EP2517868A1 (fr)

Priority Applications (22)

Application Number Priority Date Filing Date Title
EP11164249A EP2517868A1 (fr) 2011-04-29 2011-04-29 Procédé de contrôle d'une presse à agglomérer
PT127189629T PT2701899E (pt) 2011-04-29 2012-04-27 Prensa granuladora com um sistema de alimentação e um método para a moldagem de material granulado
BR112013027359-3A BR112013027359B1 (pt) 2011-04-29 2012-04-27 Fresadora de pélete para formar material peletizado e método para formar péletes
CN201280021303.0A CN103717385B (zh) 2011-04-29 2012-04-27 制丸机的控制方法
BR112013027444-1A BR112013027444B1 (pt) 2011-04-29 2012-04-27 Usina de peletização e método de preparação de péletes a partir de um material peletizável
RU2013153092/02A RU2557858C2 (ru) 2011-04-29 2012-04-27 Способ управления гранулятором
US14/114,722 US9616605B2 (en) 2011-04-29 2012-04-27 Pellet mill with an improved feed system and a method of forming pelleted material
CN201280021302.6A CN103687719B (zh) 2011-04-29 2012-04-27 具有进给系统的制丸机和形成丸粒材料的方法
US14/114,691 US20140138865A1 (en) 2011-04-29 2012-04-27 Method of Controlling a Pellet Mill
CA2834120A CA2834120C (fr) 2011-04-29 2012-04-27 Granulateur pourvu d'un systeme d'alimentation ameliore et procede de formation de granules
CA2834181A CA2834181C (fr) 2011-04-29 2012-04-27 Granulateur presentant une construction amelioree
EP12717300.3A EP2701898A1 (fr) 2011-04-29 2012-04-27 Procédé de commande d'un granulateur
PCT/EP2012/057726 WO2012146699A1 (fr) 2011-04-29 2012-04-27 Procédé de commande d'un granulateur
PCT/EP2012/057723 WO2012146696A1 (fr) 2011-04-29 2012-04-27 Granulateur
RU2013152963/02A RU2550468C1 (ru) 2011-04-29 2012-04-27 Гранулятор с улучшенной системой подачи и способ образования гранулированного материала
CA2834119A CA2834119C (fr) 2011-04-29 2012-04-27 Procede de commande d'un granulateur
EP12723395.5A EP2701900B1 (fr) 2011-04-29 2012-04-27 Granulateur
CN201280021304.5A CN103702824B (zh) 2011-04-29 2012-04-27 制粒机
PCT/EP2012/057727 WO2012146700A1 (fr) 2011-04-29 2012-04-27 Granulateur équipé d'un système d'alimentation et procédé de formation de granulés
EP12718962.9A EP2701899B1 (fr) 2011-04-29 2012-04-27 Granulateur équipé d'un système d'alimentation et procédé de formation de granulés
RU2013152962/02A RU2563395C2 (ru) 2011-04-29 2012-04-27 Гранулятор улучшенной конструкции
BR112013027404A BR112013027404A2 (pt) 2011-04-29 2012-04-27 método de controle de moinho de pelotização

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11164249A EP2517868A1 (fr) 2011-04-29 2011-04-29 Procédé de contrôle d'une presse à agglomérer

Publications (1)

Publication Number Publication Date
EP2517868A1 true EP2517868A1 (fr) 2012-10-31

Family

ID=44588282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11164249A Withdrawn EP2517868A1 (fr) 2011-04-29 2011-04-29 Procédé de contrôle d'une presse à agglomérer

Country Status (1)

Country Link
EP (1) EP2517868A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932736A (en) * 1974-04-08 1976-01-13 Beta Corporation Of St. Louis Automatic pellet producing system
US4238432A (en) * 1979-05-03 1980-12-09 Internationale Octrooi Maatschappij Extrusion presses
US4463430A (en) * 1981-08-31 1984-07-31 Beta Corporation Microprocessor based pellet mill control
EP0371519A2 (fr) * 1986-01-24 1990-06-06 Buehler Ag Presse à granuler
NL8901038A (nl) * 1989-04-25 1990-11-16 Robinson Milling Systems B V Pelleteerpers.
WO1991002644A1 (fr) * 1989-08-21 1991-03-07 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Pastilleuse
EP0472016A2 (fr) * 1990-08-20 1992-02-26 Bühler Ag Procédé pour contrôler le patinage dans une presse à granuler et dispositif pour la mise en oeuvre du procédé
US5582847A (en) * 1993-05-28 1996-12-10 Repete Corporation Optimizing pellet mill controller

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932736A (en) * 1974-04-08 1976-01-13 Beta Corporation Of St. Louis Automatic pellet producing system
US4238432A (en) * 1979-05-03 1980-12-09 Internationale Octrooi Maatschappij Extrusion presses
US4463430A (en) * 1981-08-31 1984-07-31 Beta Corporation Microprocessor based pellet mill control
EP0371519A2 (fr) * 1986-01-24 1990-06-06 Buehler Ag Presse à granuler
NL8901038A (nl) * 1989-04-25 1990-11-16 Robinson Milling Systems B V Pelleteerpers.
WO1991002644A1 (fr) * 1989-08-21 1991-03-07 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Pastilleuse
EP0472016A2 (fr) * 1990-08-20 1992-02-26 Bühler Ag Procédé pour contrôler le patinage dans une presse à granuler et dispositif pour la mise en oeuvre du procédé
US5582847A (en) * 1993-05-28 1996-12-10 Repete Corporation Optimizing pellet mill controller

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