EP2517868A1 - Verfahren zur Steuerung einer Pelletiermaschine - Google Patents
Verfahren zur Steuerung einer Pelletiermaschine Download PDFInfo
- 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- Withdrawn
Links
Images
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)
Priority Applications (22)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11164249A EP2517868A1 (de) | 2011-04-29 | 2011-04-29 | Verfahren zur Steuerung einer Pelletiermaschine |
PCT/EP2012/057727 WO2012146700A1 (en) | 2011-04-29 | 2012-04-27 | A pellet mill with an feed system and a method of forming pelleted material |
CA2834181A CA2834181C (en) | 2011-04-29 | 2012-04-27 | Pellet mill having improved construction |
CN201280021304.5A CN103702824B (zh) | 2011-04-29 | 2012-04-27 | 制粒机 |
CN201280021302.6A CN103687719B (zh) | 2011-04-29 | 2012-04-27 | 具有进给***的制丸机和形成丸粒材料的方法 |
PCT/EP2012/057726 WO2012146699A1 (en) | 2011-04-29 | 2012-04-27 | Method of controlling a pellet mill |
RU2013152963/02A RU2550468C1 (ru) | 2011-04-29 | 2012-04-27 | Гранулятор с улучшенной системой подачи и способ образования гранулированного материала |
RU2013152962/02A RU2563395C2 (ru) | 2011-04-29 | 2012-04-27 | Гранулятор улучшенной конструкции |
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 |
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 |
BR112013027359-3A BR112013027359B1 (pt) | 2011-04-29 | 2012-04-27 | Fresadora de pélete para formar material peletizado e método para formar péletes |
CA2834120A CA2834120C (en) | 2011-04-29 | 2012-04-27 | A pellet mill with an improved feed system and a method of forming pelleted material |
US14/114,691 US20140138865A1 (en) | 2011-04-29 | 2012-04-27 | Method of Controlling a Pellet Mill |
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 |
RU2013153092/02A RU2557858C2 (ru) | 2011-04-29 | 2012-04-27 | Способ управления гранулятором |
CN201280021303.0A CN103717385B (zh) | 2011-04-29 | 2012-04-27 | 制丸机的控制方法 |
PCT/EP2012/057723 WO2012146696A1 (en) | 2011-04-29 | 2012-04-27 | Pellet mill |
CA2834119A CA2834119C (en) | 2011-04-29 | 2012-04-27 | Method of controlling a pellet mill |
EP12723395.5A EP2701900B1 (de) | 2011-04-29 | 2012-04-27 | Pelletiermaschine |
EP12717300.3A EP2701898A1 (de) | 2011-04-29 | 2012-04-27 | Verfahren zur steuerung einer pelletiermaschine |
EP12718962.9A EP2701899B1 (de) | 2011-04-29 | 2012-04-27 | Pelletiermaschine mit einem zuführsystem und verfahren zur herstellung von pelletiertem material |
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 (de) | 2011-04-29 | 2011-04-29 | Verfahren zur Steuerung einer Pelletiermaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2517868A1 true EP2517868A1 (de) | 2012-10-31 |
Family
ID=44588282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11164249A Withdrawn EP2517868A1 (de) | 2011-04-29 | 2011-04-29 | Verfahren zur Steuerung einer Pelletiermaschine |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2517868A1 (de) |
Citations (8)
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 (de) * | 1986-01-24 | 1990-06-06 | Buehler Ag | Würfelpresse |
NL8901038A (nl) * | 1989-04-25 | 1990-11-16 | Robinson Milling Systems B V | Pelleteerpers. |
WO1991002644A1 (en) * | 1989-08-21 | 1991-03-07 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Pelleting press |
EP0472016A2 (de) * | 1990-08-20 | 1992-02-26 | Bühler Ag | Verfahren zur Schlupfregelung an einer Würfelpresse und Vorrichtung zur Durchführung des Verfahrens |
US5582847A (en) * | 1993-05-28 | 1996-12-10 | Repete Corporation | Optimizing pellet mill controller |
-
2011
- 2011-04-29 EP EP11164249A patent/EP2517868A1/de not_active Withdrawn
Patent Citations (8)
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 (de) * | 1986-01-24 | 1990-06-06 | Buehler Ag | Würfelpresse |
NL8901038A (nl) * | 1989-04-25 | 1990-11-16 | Robinson Milling Systems B V | Pelleteerpers. |
WO1991002644A1 (en) * | 1989-08-21 | 1991-03-07 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Pelleting press |
EP0472016A2 (de) * | 1990-08-20 | 1992-02-26 | Bühler Ag | Verfahren zur Schlupfregelung an einer Würfelpresse und Vorrichtung zur Durchführung des Verfahrens |
US5582847A (en) * | 1993-05-28 | 1996-12-10 | Repete Corporation | Optimizing pellet mill controller |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2834119C (en) | Method of controlling a pellet mill | |
CN108190392B (zh) | 一种带式输送机液压张紧力动态测量与反馈方法 | |
CN102849643B (zh) | 一种液压卷扬机构故障判断方法及*** | |
US6655662B2 (en) | Method for controlling crane brake operation | |
CN106311449B (zh) | 振动给料机给料速度的控制***和方法、及破碎机 | |
RU2011104187A (ru) | Адаптивное регулирование привода фрезерной машины | |
MXPA05005514A (es) | Dispositivo de cresta exterior-lecho exterior para un equipo de servicio para pozo. | |
CN111284070B (zh) | 冲压***以及冲压***的控制方法 | |
CN102849642B (zh) | 一种液压卷扬机构控制方法及*** | |
CN204471234U (zh) | 一种自动调压的钢带对中装置 | |
CN105600634A (zh) | 一种曳引机制动力矩的检测方法 | |
CN106423529A (zh) | 一种立磨磨机液压控制***及方法 | |
CN106494961B (zh) | 一种深井提升***过卷保护方法与装置 | |
EP3453469B1 (de) | Faltenbildungdetektionsvorrichtung, ziehkissenvorrichtung und kissenschutzvorrichtung und faltenbildungsdetektionsverfahren, verfahren zur automatischen einstellung der ziehkissenkraft und kissenschutzverfahren | |
CN202757776U (zh) | 制动器扭转疲劳试验机 | |
EP2517868A1 (de) | Verfahren zur Steuerung einer Pelletiermaschine | |
CN104493757A (zh) | 一种自动调压的钢带对中装置 | |
CN104390800B (zh) | 电梯限速器寿命测试装置及其测试方法 | |
CN203946715U (zh) | 一种利用气缸压力变化自动调速的建筑用双笼施工升降机 | |
CN103693559B (zh) | 一种配重提升控制方法、装置及*** | |
CN106348120B (zh) | 一种矿井提升机智能安全制动*** | |
CN208082669U (zh) | 破碎机*** | |
CA3154436A1 (en) | Method and trench cutting device for producing a cut trench in the ground | |
CN106672826A (zh) | 一种塔机自顶升安全控制***及控制方法 | |
RU2356738C2 (ru) | Гидравлический пресс |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20130503 |