EP0093192A1 - Method and device for controlling the working of a grinding apparatus - Google Patents

Method and device for controlling the working of a grinding apparatus Download PDF

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Publication number
EP0093192A1
EP0093192A1 EP82104768A EP82104768A EP0093192A1 EP 0093192 A1 EP0093192 A1 EP 0093192A1 EP 82104768 A EP82104768 A EP 82104768A EP 82104768 A EP82104768 A EP 82104768A EP 0093192 A1 EP0093192 A1 EP 0093192A1
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EP
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Prior art keywords
function
sensor
flow
flow rate
signal
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Granted
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EP82104768A
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German (de)
French (fr)
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EP0093192B1 (en
Inventor
Daniel Fontanille
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Stein Industrie SA
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Stein Industrie SA
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Priority to AT82104768T priority Critical patent/ATE22818T1/en
Publication of EP0093192A1 publication Critical patent/EP0093192A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/1805—Monitoring devices for tumbling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the present invention relates to a method for adjusting the operation of a material grinding apparatus, in which the noise emitted by the apparatus, the power absorbed by it, and the feed rates of the material are recorded. apparatus and outgoing crushed material. It also extends to a device for implementing this method.
  • French patent FR-A-2140782 of the Applicant relates to an adjustment device of this kind, comprising one or more sensor members of one or more variables related to the charge rate, in particular of the noise generated by the device, and means for maintaining the charge flow at a predetermined value according to the indications of the sensor member.
  • the adjustment of the charge flow rate does not necessarily provide the best operating conditions when the properties of the material to be ground (grain size, friability, humidity, etc.) are variable. In this case, there is a risk of not obtaining the optimum yield and a constant quality of the ground material, which may be insufficient at times or, on the contrary, excessively.
  • the object of the present invention is to remedy these drawbacks, and to provide a method and a device for adjusting the operation of a grinding apparatus which is not very sensitive to changes in the properties of the material to be ground, and constantly ensures a yield of 1 grinding operation close to the optimum value.
  • the method according to the invention is characterized in that the flow of material admitted into the apparatus is adjusted as a function of the variables recorded so as to maintain the quantity of material present in the latter at a constant high value, close to that for which the efficiency of the mill is maximum.
  • a rapid coarse adjustment of the quantity of material in the grinder is ensured as a function of the flow rates of incoming and outgoing material, and a slower fine adjustment as a function of the noise emitted and the power consumed by the device.
  • the device according to the invention comprising a sensor of the noise emitted by the grinding apparatus, a sensor of the power absorbed by it, a sensor of the flow of material introduced into the apparatus, a sensor of the flow of crushed material outgoing, and a device for adjusting the flow of material introduced into the device, is characterized in that it further comprises a computer weighting the indications of the sensors into a global signal of the amount of material in the device, a regulator giving a correction signal as a function of the global signal of the computer and of a setpoint signal, and a comparator giving to said device for adjusting the material flow rate introduces a correction order as a function of the correction signal of the regulator and the flow rates of material entering and leaving the device.
  • the ball mill 1 with a rotating closed tank, of horizontal axis, is supplied with coal to be ground by the conveyor belt 2, the motor rollers of which are driven by the electric motor 3, the speed of which is recorded by the tachometer 4.
  • the crusher is rotated by the electric motor 5, by means of a pinion engaged on the ring gear 6.
  • the power absorbed by the motor 5 is recorded by the wattmeter 7.
  • a diaphragm 9 allows the measurement of the entrainment air flow, representative of the evacuation of charcoal flow, by means of the flow meter 10.
  • a member 11 for recording the noise level generated by the grinder is connected to the computer 12 by the link 11A.
  • the latter also receives via the link 4A the indication of the tachometer 4 of the drive motor of the conveyor belt supplying the coal to be ground, by the link 7A that of the power absorbed, measured by the wattmeter 7, and by the connection 10A that of the flowmeter 10 indicative of the flow rate of ground coal evacuated. It weights these different indications and draws a correction signal from them, which it transmits on the one hand by circuit 13 to regulator 14, on the other hand by circuit 15 to display devices of the power consumed and the quantity of coal present in the mill.
  • the regulator 14 compares the indication of the quantity of coal in the mill transmitted by the computer 12 with a reference value, and draws a signal therefrom. correction, which it transmits to the comparator 16.
  • the latter also receives by the circuit 17 the indication of the tachometer 4, representative of the feed rate of material to be ground, and by the circuit 18 the indication of the flow meter 10 , representative of the flow rate of ground material discharged. It draws from it a signal for correction of the feed rate of the coal mill, this signal generating a rapid, but approximate correction, if it comes from the comparison of the feed and discharge rates, and a slower correction, but more precise, if it comes from the comparator 14.
  • the correction signal is transmitted by the circuit 19 to the motor 3 for driving the conveyor belt supplying the mill.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

A method of regulating the operation of a material-crusher (1) in which the noise emitted by the crusher, the power absorbed thereby and the supply and removal flow rates of the material therein are detected. The flow rate (2) of the material fed into the crusher is regulated so as to maintain the quantity of material therein at a high and constant value close to that at which the efficiency of the crusher is at its best.

Description

La présente invention concerne un procédé de réglage du fonctionnement d'un appareil de broyage d'un matériau, dans lequel on enregistre le bruit émis par l'appareil, la puissance absorbée par celui-ci, et les débits d'alimentation de l'appareil et de matériau broyé sortant. Il s'étend en outre à un dispositif de mise en oeuvre de ce procédé.The present invention relates to a method for adjusting the operation of a material grinding apparatus, in which the noise emitted by the apparatus, the power absorbed by it, and the feed rates of the material are recorded. apparatus and outgoing crushed material. It also extends to a device for implementing this method.

Le brevet français FR-A-2140782 de la Demanderesse porte sur un dispositif de réglage de ce genre, comportant un ou des organes capteurs d'une ou plusieurs variables liées au débit de charge, notamment du bruit engendré par l'appareil, et des moyens pour maintenir le débit de charge à une valeur prédéterminée en fonction des indications de l'organe capteur.French patent FR-A-2140782 of the Applicant relates to an adjustment device of this kind, comprising one or more sensor members of one or more variables related to the charge rate, in particular of the noise generated by the device, and means for maintaining the charge flow at a predetermined value according to the indications of the sensor member.

On sait en effet que le bruit engendré par l'appareil, très élevé quand il est presque vide, décroit très rapidement quand son taux de remplissage en matériau à broyer augmente, puis tend asymptotiquement vers une valeur minimale. En réglant l'appareil à un niveau de bruit faible, on se trouve dans une zone de fonctionnement pour laquelle la puissance consommée diminue quand la quantité de matériau en cours de broyage augmente, et le rendement de l'appareil est élevé.We know that the noise generated by the device, very high when it is almost empty, decreases very quickly when its filling rate in material to be ground increases, then tends asymptotically towards a minimum value. By setting the device to a low noise level, you are in an operating zone for which the power consumed decreases when the amount of material being ground increases, and the efficiency of the device is high.

Toutefois, le réglage du débit de charge ne procure pas nécessairement les meilleurs conditions de fonctionnement quand les propriétés du matériau à broyer (granulométrie, friabilité, humidité, etc....) sont variables. On risque dans ce cas de ne pas obtenir le rendement optimal et une qualité constante du matériau broyé, qui peut l'être par moments insuffisamment ou au contraire de façon excessive.However, the adjustment of the charge flow rate does not necessarily provide the best operating conditions when the properties of the material to be ground (grain size, friability, humidity, etc.) are variable. In this case, there is a risk of not obtaining the optimum yield and a constant quality of the ground material, which may be insufficient at times or, on the contrary, excessively.

La présente invention a pour but de remédier à ces inconvénients, et de procurer un procédé et un dispositif de réglage du fonctionnement d'un appareil de broyage qui soit peu sensible aux modifications des propriétés du matériau à broyer, et assure constamment un rendement de l'opération de broyage proche de la valeur optimale.The object of the present invention is to remedy these drawbacks, and to provide a method and a device for adjusting the operation of a grinding apparatus which is not very sensitive to changes in the properties of the material to be ground, and constantly ensures a yield of 1 grinding operation close to the optimum value.

Elle a encore pour but d'éviter tout bourrage de l'appareil par une admission excessive de matériau à broyer, de réduire l'usure des corps broyants rapportée au débit de matériau broyé à une valeur sensiblement minimale, de faire fonctionner l'appareil de broyage dans la zone de charge où il est le moins bruyant et de lui procurer une certaine autonomie de fonctionnement en cas d'arrêt momentané de son alimentation.It also aims to avoid any jamming of the apparatus by an excessive admission of material to be ground, to reduce the wear of the grinding bodies referred to the flow rate of crushed material at a substantially minimum value, to operate the grinding apparatus in the load zone where it is the least noisy and to give it a certain operating autonomy in the event of a temporary interruption of sound food.

Le procédé selon l'invention est caractérisé en ce que l'on règle en fonction des variables enregistrées le débit de matériau admis dans l'appareil de façon à maintenir la quantité de matériau présente dans ce dernier à une valeur élevée constante, proche de celle pour laquelle le rendement du broyeur est maximal.The method according to the invention is characterized in that the flow of material admitted into the apparatus is adjusted as a function of the variables recorded so as to maintain the quantity of material present in the latter at a constant high value, close to that for which the efficiency of the mill is maximum.

De préférence, l'on assure un réglage grossier rapide de la quantité de matériau dans le broyeur en fonction des débits de matériau entrant et sortant, et un réglage fin plus lent en fonction du bruit émis et de la puissance consommée par l'appareil.Preferably, a rapid coarse adjustment of the quantity of material in the grinder is ensured as a function of the flow rates of incoming and outgoing material, and a slower fine adjustment as a function of the noise emitted and the power consumed by the device.

Le dispositif selon l'invention, comprenant un capteur du bruit émis par l'appareil de broyage, un capteur de la puissance absorbée par celui-ci, un capteur du débit de matériau introduit dans l'appareil, un capteur du débit de matériau broyé sortant, et un organe de réglage du débit de matériau introduit dans l'appareil, est caractérisé en ce qu'il comprend en outre un ordinateur pondérant les indications des capteurs en un signal global de quantité du matériau dans l'appareil, un régulateur donnant un signal de correction en fonction du signal global de l'ordinateur et d'un signal de consigne, et un comparateur donnant audit organe de réglage du débit de matériau introduit un ordre de correction en fonction du signal de correction du régulateur et des débits de matériau entrant et sortant de l'appareil.The device according to the invention, comprising a sensor of the noise emitted by the grinding apparatus, a sensor of the power absorbed by it, a sensor of the flow of material introduced into the apparatus, a sensor of the flow of crushed material outgoing, and a device for adjusting the flow of material introduced into the device, is characterized in that it further comprises a computer weighting the indications of the sensors into a global signal of the amount of material in the device, a regulator giving a correction signal as a function of the global signal of the computer and of a setpoint signal, and a comparator giving to said device for adjusting the material flow rate introduces a correction order as a function of the correction signal of the regulator and the flow rates of material entering and leaving the device.

Il est décrit ci-après, à titre d'exemple et en référence à la figure unique du dessin annexé, un dispositif de réglage du fonctionnement d'un broyeur à charbon à boulets selon l'invention.It is described below, by way of example and with reference to the single figure of the accompanying drawing, a device for adjusting the operation of a coal ball mill according to the invention.

Dans la figure 1, le broyeur à boulets 1 à cuve fermée tournante, d'axe horizontal, est alimenté en charbon à broyer par le tapis roulant 2, dont les galets moteurs sont entraînés par le moteur électrique 3, dont la vitesse est enregistrée par le tachymètre 4. Le broyeur est entraîné en rotation par le moteur électrique 5, par l'intermédiaire d'un pignon en prise sur la couronne dentée 6. La puissance absorbée par le moteur 5 est enregistrée par le wattmètre 7.In FIG. 1, the ball mill 1 with a rotating closed tank, of horizontal axis, is supplied with coal to be ground by the conveyor belt 2, the motor rollers of which are driven by the electric motor 3, the speed of which is recorded by the tachometer 4. The crusher is rotated by the electric motor 5, by means of a pinion engaged on the ring gear 6. The power absorbed by the motor 5 is recorded by the wattmeter 7.

Dans la tuyauterie d'évacuation du charbon pulvérisé, représentée schématiquement en 8, un diaphragme 9 permet la mesure du débit d'air d'entraînement, représentatif du débit de charbon évacué, grâce au débitmètre 10.In the pulverized coal evacuation pipe, shown diagrammatically at 8, a diaphragm 9 allows the measurement of the entrainment air flow, representative of the evacuation of charcoal flow, by means of the flow meter 10.

Par ailleurs, un organe 11 d'enregistrement du niveau de bruit engendré par le broyeur, appelé "oreille électrique", est relié à l'ordinateur 12 par la liaison 11A. Celui-ci reçoit aussi par la liaison 4A l'indication du tachymètre 4 du moteur d'entraînement du tapis roulant d'alimentation en charbon à broyer, par la liaison 7A celle de la puissance absorbée, mesurée par le wattmètre 7, et par la liaison 10A celle du débitmètre 10 indicatif du débit de charbon broyé évacué. Il pondère ces différentes indications et en tire un signal de correction, qu'il transmet d'une part par le circuit 13 au régulateur 14, d'autre part par le circuit 15 à des organes d'affichage de la puissance consommée et de la quantité de charbon présente dans le broyeur.Furthermore, a member 11 for recording the noise level generated by the grinder, called an "electric ear", is connected to the computer 12 by the link 11A. The latter also receives via the link 4A the indication of the tachometer 4 of the drive motor of the conveyor belt supplying the coal to be ground, by the link 7A that of the power absorbed, measured by the wattmeter 7, and by the connection 10A that of the flowmeter 10 indicative of the flow rate of ground coal evacuated. It weights these different indications and draws a correction signal from them, which it transmits on the one hand by circuit 13 to regulator 14, on the other hand by circuit 15 to display devices of the power consumed and the quantity of coal present in the mill.

Le régulateur 14 compare l'indication de la quantité de charbon dans le broyeur transmise par l'ordinateur 12 à une valeur de référence, et en tire un signal. de correction, qu'il transmet au comparateur 16. Celui-ci reçoit en outre par le circuit 17 l'indication du tachymètre 4, représentative du débit d'alimentation en matériau à broyer, et par le circuit 18 l'indication du débitmètre 10, représentative du débit de matériau broyé évacué. Il en tire un signal de correction du débit d'alimentation du broyeur en charbon, ce signal engendrant une correction rapide, mais approximative, s'il provient de la comparaison des débits d'alimentation et d'évacuation, et une correction plus lente, mais plus précise, s'il provient du comparateur 14. Le signal de correction est transmis par le circuit 19 au moteur 3 d'entraînement du tapis roulant d'alimentation du broyeur.The regulator 14 compares the indication of the quantity of coal in the mill transmitted by the computer 12 with a reference value, and draws a signal therefrom. correction, which it transmits to the comparator 16. The latter also receives by the circuit 17 the indication of the tachometer 4, representative of the feed rate of material to be ground, and by the circuit 18 the indication of the flow meter 10 , representative of the flow rate of ground material discharged. It draws from it a signal for correction of the feed rate of the coal mill, this signal generating a rapid, but approximate correction, if it comes from the comparison of the feed and discharge rates, and a slower correction, but more precise, if it comes from the comparator 14. The correction signal is transmitted by the circuit 19 to the motor 3 for driving the conveyor belt supplying the mill.

Bien que le dispositif qui vient d'être décrit en référence à la figure du dessin paraisse la forme de réalisation préférable de l'invention, on comprendra que diverses modifications peuvent lui être apportées sans sortir du cadre de l'invention, certains de ses organes pouvant être remplacés par d'autres qui joueraient un rôle technique analogue. En particulier, il peut être relié à des capteurs de variables liées aux propriétés du matériau à broyer. Il peut être utilisé avec de nombreux matériaux à broyer autres que le charbon.Although the device which has just been described with reference to the figure of the drawing appears to be the preferable embodiment of the invention, it will be understood that various modifications can be made to it without departing from the scope of the invention, certain of its organs can be replaced by others who play a technical role similar. In particular, it can be connected to variable sensors linked to the properties of the material to be ground. It can be used with many grinding materials other than coal.

Claims (3)

1/ Procédé de réglage du fonctionnement d'un appareil de broyage d'un matériau, dans lequel on enregistre le bruit émis par l'appareil, la puissance absorbée par celui-ci, et les débits d'alimentation de l'appareil et de matériau broyé sortant, caractérisé en ce que l'on régle en fonction de ces variables le débit de matériau admis dans l'appareil de façon à maintenir la quantité de matériau présente dans ce dernier à une valeur élevée constante, proche de celle pour laquelle le rendement du broyeur est maximal.1 / Method for adjusting the operation of an apparatus for grinding a material, in which the noise emitted by the apparatus, the power absorbed by it, and the feed rates of the apparatus and of outgoing crushed material, characterized in that the flow of material admitted into the apparatus is adjusted as a function of these variables so as to maintain the quantity of material present in the latter at a constant high value, close to that for which the performance of the mill is maximum. 2/ Procédé selon la revendication 1, caractérisé en ce que l'on assure un réglage rapide grossier de la quantité de matériau dans le broyeur en fonction des débits de matériau entrant et sortant, et un réglage fine plus lent en fonction du bruit émis et de la puissance consommée par l'appareil.2 / A method according to claim 1, characterized in that a rapid coarse adjustment of the quantity of material in the mill is ensured as a function of the flow rates of material entering and leaving, and a slower fine adjustment as a function of the noise emitted and of the power consumed by the device. 3/ Dispositif de mise en oeuvre du procédé selon la revendication 1, comprenant un captèur (11) du bruit émis par l'appareil de broyage, un capteur (7) de la puissance absorbée par celui-ci, un capteur (4) du débit de matériau introduit dans l'appareil, un capteur (10) du débit de matériau broyé sortant, et un organe (3) de réglage du débit de matériau introduit dans l'appareil, caractérisé en ce qu'il comprend - en outre un ordinateur (12) pondérant les indications des capteurs en un signal global de quantité du matériau dans l'appareil, un régulateur (14) donnant un signal de correction en fonction du signal global de l'ordinateur et d'un signal de consigne, et un comparateur (16) donnant audit organe de réglage du débit de matériau introduit un ordre de correction en fonction du signal de correction du régulateur et des débits de matériau entrant et sortant de l'appareil.3 / Device for implementing the method according to claim 1, comprising a sensor (11) of the noise emitted by the grinding apparatus, a sensor (7) of the power absorbed by it, a sensor (4) of the flow rate of material introduced into the apparatus, a sensor (10) of the flow rate of outgoing ground material, and a member (3) for adjusting the flow rate of material introduced into the apparatus, characterized in that it further comprises a computer (12) weighting the indications of the sensors into an overall signal of the quantity of material in the device, a regulator (14) giving a correction signal as a function of the overall signal of the computer and a setpoint signal, and a comparator (16) giving to said material flow adjusting member introduces a correction order as a function of the correction signal from the regulator and of the material flows entering and leaving the device.
EP82104768A 1982-05-03 1982-06-01 Method and device for controlling the working of a grinding apparatus Expired EP0093192B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82104768T ATE22818T1 (en) 1982-05-03 1982-06-01 METHOD AND DEVICE FOR CONTROLLING THE OPERATION OF A SHREDDING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8207631 1982-05-03
FR8207631A FR2525922B1 (en) 1982-05-03 1982-05-03 METHOD AND DEVICE FOR ADJUSTING THE OPERATION OF A GRINDING APPARATUS

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EP0093192A1 true EP0093192A1 (en) 1983-11-09
EP0093192B1 EP0093192B1 (en) 1986-10-15

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EP82104768A Expired EP0093192B1 (en) 1982-05-03 1982-06-01 Method and device for controlling the working of a grinding apparatus

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US (1) US4597535A (en)
EP (1) EP0093192B1 (en)
AT (1) ATE22818T1 (en)
DE (1) DE3273741D1 (en)
FR (1) FR2525922B1 (en)
ZA (1) ZA823904B (en)

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CH684615GA3 (en) * 1992-03-10 1994-11-15 Buehler Ag Agitator mill.
CN103191826A (en) * 2013-04-09 2013-07-10 华北电力大学 Method for controlling coal quantity stored in ball grinding mill based on kinetic energy of steel ball

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US5040734A (en) * 1987-09-22 1991-08-20 The British Petroleum Company P.L.C. Method for determining physical properties
DE3843602A1 (en) * 1988-12-23 1990-07-05 Gao Ges Automation Org PROCEDURE OR DEVICE FOR AUTOMATICALLY MONITORING THE DESTRUCTION OF THIN LEAF
US5226604A (en) * 1989-04-07 1993-07-13 Salzgitter Maschinenbau Gmbh Method of and apparatus for adjusting comminuting machines
CA2080870A1 (en) * 1992-01-14 1993-07-15 Gerard J. Schorn Method and system for controlling punch press noise
US5201471A (en) * 1992-05-29 1993-04-13 The Dow Chemical Company Method for operating a rod mill to obtain uniform product slurry
US5570844A (en) * 1992-10-28 1996-11-05 Slegten S.A. Method for tubular rotary ball mill or mill with similar grinding instruments
US6259222B1 (en) 1999-02-26 2001-07-10 Alan K. Kira Device and method for regulating maximum loading on an electric motor in an aggregate feed replenishing system
US7489254B2 (en) * 2005-04-07 2009-02-10 Damian Rodriguez System and method for monitoring a vertical shaft impact crusher
WO2016022663A2 (en) * 2014-08-07 2016-02-11 Emerson Electric (Us) Holding Corporation (Chile) Limitada Monitor and control of tumbling mill using measurements of vibration, electrical power input and mechanical power
CN109909022B (en) * 2019-04-18 2020-11-17 湖南山瑞重工科技有限公司 Automatic speed regulating system and method for ball mill
CN110947506A (en) * 2019-12-20 2020-04-03 华润电力技术研究院有限公司 Coal mill control method and equipment
CN111570072B (en) * 2020-05-07 2021-12-10 浙大宁波理工学院 Load control system and method of cement ball mill

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CH684615GA3 (en) * 1992-03-10 1994-11-15 Buehler Ag Agitator mill.
CN103191826A (en) * 2013-04-09 2013-07-10 华北电力大学 Method for controlling coal quantity stored in ball grinding mill based on kinetic energy of steel ball

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Publication number Publication date
EP0093192B1 (en) 1986-10-15
ATE22818T1 (en) 1986-11-15
FR2525922B1 (en) 1985-10-11
DE3273741D1 (en) 1986-11-20
ZA823904B (en) 1983-03-30
US4597535A (en) 1986-07-01
FR2525922A1 (en) 1983-11-04

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