JP2008119622A - Grinding equipment, its control device and raw material supply method of grinding equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lower a vibration level generated even with regard to such a raw material with poor grindability as to be difficult to be dealt with, under variable speed control by a variable speed electric motor, as the raw material layer is reduced to the specified thickness, and consequently, ensure a stably continuous operation. <P>SOLUTION: The control device comprises (1) a set data storage means which inputs rotational frequency data, raw material data and raw material supply data and stores predetermined set data, assuming that a vibration of preset magnitude occurs in a vertical grinder, when the preset layer thickness of the raw material is reduced to the specified thickness, (2) a set data storage means which stores the preset data, (3) a vibration forecast means which forecasts the generation of a vibration of such a magnitude as preset in the vertical grinder from the reduction of the layer thickness, by comparing the stored layer thickness measurement data acquired from a layer thickness meter with the set data stored in the set data storage means, and (4) a feedforward signal generating means which generates a feedforward signal in order to a void the vibration when the vibration is forecast. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes a vertical crusher, a pulverization facility for finely pulverizing a raw material that is particularly hard and difficult to pulverize, such as petroleum coke, cement clinker, and blast furnace slag, and its control device, and the raw material in the pulverization facility It relates to a supply method.

  When hard and poorly pulverized raw materials such as petroleum coke, cement clinker, and blast furnace slag mentioned above are finely pulverized, a strong pressure is applied to the pulverizing roller, so the raw material layer thickness is relatively small, which causes vibration in the pulverizer. The generated vibration value (amplitude) is larger than that of ordinary raw materials, and there is a problem that stable continuous operation cannot be performed. A proposal for solving this problem is described in Patent Document 1.

  That is, Patent Document 1 discloses a crushing facility that uses a vertical crusher as a preliminary crusher, and the vertical crusher has a plurality of freely rotatable crushing rollers disposed on the upper surface of the outer peripheral portion of the rotary table. A vertical crusher that applies a predetermined crushing force to the crushing roller to crush the raw material between the upper surface of the rotary table and the peripheral surface of the crushing roller, and has a vibration meter attached to the casing, A raw material layer thickness meter is provided between the grinding rollers, the rotary table driving motor is a variable speed motor, and when the indicated value of the vibrometer exceeds a preset value or the indicated value of the thickness meter is Equipped with a control device that changes the rotation speed of the variable speed motor when it leaves the preset range, and has a discharge port for the pulverized product at the lower part of the outer periphery of the previous rotary table, and supplies the raw material to the vertical crusher Raw material supply equipment, A vertical pulverizer, a finishing mill for pulverizing the pulverized product of the vertical pulverizer, a classification device for classifying fine powder after pulverization, a collection device for collecting fine powder after classification, and a suction fan A grinding facility is described.

Patent Document 2 describes a vibration prediction device for a pulverizer and a control device based on the prediction of the pulverizer.
Patent Document 3 describes a control method and a control device for a pulverizer.

JP-A-5-57209 JP-A-9-141116 JP-A-9-192514

  According to the pulverization equipment described in Patent Document 1, a variable speed motor is used and variable speed control, that is, the rotational speed is reduced to reduce the raw material to a relatively small raw material layer thickness by vibration. It became possible to grind.

  According to recent needs, it has come to be demanded to further finely pulverize raw materials having poor grindability. Such pulverization of raw materials can no longer be dealt with only by variable speed control using a variable speed electric motor, and a phenomenon that vibration occurs in the pulverizer when a certain raw material layer thickness is reached.

  In view of this point, the present invention can reduce the vibration value generated even for raw materials with poor pulverization properties that are difficult to cope with with variable speed control of a variable speed motor when the thickness is reduced to a predetermined material layer thickness. An object of the present invention is to provide a pulverizer facility capable of performing stable continuous operation, a control device therefor, and a raw material supply method in the pulverization facility.

  The present invention predicts the occurrence of vibration when the layer thickness of the raw material becomes a predetermined thickness, generates a feedforward signal for avoiding the vibration, and based on the feedford signal The purpose is to perform control to increase the layer thickness of the raw material to the vertical crusher in advance. As a typical example of increasing the layer thickness of the raw material, the supply of the raw material is first increased.

Specifically, the present invention includes a casing, a rotary table disposed in the casing, a pulverizing roller disposed above the outer periphery of the rotary table, and a raw material supply for supplying the raw material into the casing. And a pulverized product discharging means provided in the casing, and applying a predetermined pulverizing force to the pulverizing roller to pulverize the raw material between the upper surface of the rotary table and the peripheral surface of the pulverizing roller A layer thickness meter that measures the layer thickness of the raw material between the rotary table and the grinding roller during operation, a variable speed motor that drives the rotary table, and a control device that changes the rotational speed of the variable speed motor. In the crushing equipment
The control device inputs rotation speed data, raw material data, and raw material supply data, and when the predetermined raw material layer thickness becomes a predetermined thickness, the vertical crusher has a predetermined magnitude of vibration. Setting data storage means for storing predetermined setting data, and
Generation of vibration of a predetermined magnitude in the vertical crusher from the thin layer thickness by comparing the input layer thickness measurement data from the layer thickness meter with the setting data stored in the setting data storage means Vibration prediction means for predicting
Feedford signal generating means for generating a feedford signal for avoiding the vibration when the vibration is predicted;
A pulverizing facility is provided that outputs a feedford signal to the layer thickness control means.

In the above pulverization facility, the control device outputs the feedford signal generated when the vibration is predicted to the variable speed motor control means.
In the above pulverization equipment, a vibration meter is attached to the casing, and the setting data storage means stores predetermined setting data indicating that the vertical crusher has a predetermined magnitude of vibration, and the control The apparatus includes feedback signal generation means for comparing the input vibration measurement data from the vibrometer with the setting data stored in the setting data storage means to generate a feedback signal for reducing vibration. And
In the above pulverization facility, the layer thickness control means increases the supply of the raw material by controlling the driving device of the raw material supply apparatus that supplies the raw material to the raw material supply means when the Feedford signal is generated. It is characterized by.

  The present invention further relates to setting data for storing predetermined setting data on the assumption that the vertical crusher has a predetermined amount of vibration when the layer thickness of the predetermined raw material becomes a predetermined thickness. The layer thickness measurement data from the input layer thickness meter and the setting data stored in the setting data storage unit are compared with each other, and the size determined in advance in the vertical crusher based on the thin layer thickness And a feedford signal generating means for generating a feedford signal for avoiding the vibration when the vibration is predicted, and a feedford signal to the layer thickness control means. Is provided, and the control device itself of the pulverization facility is provided.

The present invention further includes a casing, a rotary table disposed in the casing, a crushing roller disposed above an outer peripheral portion of the rotary table, a raw material supply means for supplying a raw material to the inside of the casing, A vertical crusher that is provided with a discharging means for discharging a pulverized product provided in the casing, and applies a predetermined pulverizing force to the pulverizing roller to pulverize the raw material between the upper surface of the rotary table and the peripheral surface of the pulverizing roller. In a crushing facility comprising a layer thickness meter that measures a layer thickness of a raw material between the rotary table and the crushing roller, a variable speed electric motor that drives the rotary table, and a control device that changes the rotational speed of the variable speed electric motor In the raw material supply method,
The rotational speed data, the raw material data and the raw material supply data are input, and when the layer thickness meter data and the raw material layer thickness input from the layer thickness meter become a predetermined thickness, the vertical crusher is preliminarily stored. The generation of vibration of a predetermined magnitude is predicted, and when the vibration is predicted, a feedforward signal for avoiding the vibration is generated, and the raw material is supplied to the vertical crusher based on the feedford signal A raw material supply method in a pulverization facility is provided.

  In the raw material supply method described above, when the supply of the raw material is restricted, control is performed to reduce the speed of the variable speed motor.

  According to the present invention, when the layer thickness of the raw material reaches a predetermined thickness, generation of vibration is predicted, a feedford signal for avoiding vibration is generated, and vertical crushing is performed based on the feedford signal. Since the control to increase the layer thickness of the raw material to the machine in advance and the supply of the raw material to increase in advance as a typical one to increase the layer thickness of the raw material, the predetermined raw material When the layer thickness is reduced, the vibration value generated even for raw materials with poor pulverization characteristics that are difficult to cope with with variable speed control of a variable speed motor can be reduced, and stable continuous operation can be performed. The effect is achieved.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a machine of a crushing equipment that is an embodiment of the present invention.
In FIG. 1, the pulverization equipment 100 includes a vertical crusher 1 (sometimes referred to as a mill), a control device 2, various measuring instruments including a raw material thickness gauge 3, and a raw material supply equipment 4. .
The vertical crusher 1 includes a rotary table 21 and a crushing roller 22, and these facilities are arranged in a cylindrical casing 23.

  The rotary table 21 is rotated at a low speed by being driven by a speed reducer 25 by a variable speed electric motor (hereinafter referred to as a motor) 24 at a lower portion of the cylindrical casing 23. A plurality of crushing rollers 22 that are driven by hydraulic pressure or the like are provided at locations that equally divide the upper outer peripheral portion of the rotary table 21 in the circumferential direction.

  The crushing roller 22 is connected to a piston rod 35 of a hydraulic cylinder 34 via an arm 32 pivotally supported on the casing 23 by shaft pulling and another arm 33, and by operating the hydraulic cylinder 34, The crushing roller 22 is pressed onto the rotary table 21 to give a crushing pressure to the raw material.

  Reference numeral 36 denotes a dam ring which is provided on the outer peripheral edge of the turntable 21 and adjusts the raw material layer thickness, and constitutes a layer pressure control means. 37 is an annular space passage for gas blowing around the table 21, 38 is a gas supply passage, 39 is a rotary separator for transferring the raw material crushed by the blades 40, 41 is a discharge port for taking out the product together with the gas, and 42 is an input of the raw material A chute (intake). Thus, a raw material supply means for supplying the raw material into the casing 23 and a discharge means for discharging the pulverized product as a product are provided.

  In such a vertical crusher 1, when the raw material supplied to the central portion of the rotary table 21 by the raw material charging chute 42 slides on the rotary table 21 by providing a centrifugal force in the table radial direction by the rotation of the rotary table 21. The rotating table 21 receives a force in the rotating direction, and slides between the rotating table 21 and rotates somewhat slower than the rotating speed of the rotating table 21. The above two forces, that is, the radial force and the rotational force are combined, and the raw material moves to the outer peripheral portion of the rotary table 21 in a spiral path on the rotary table. At this outer peripheral portion, the crushing roller 22 is pressed and rotating, so that the raw material describing the spiral enters from a direction between the crushing roller 22 and the rotary table 21 at an angle with the roller axis direction. It is bitten and crushed.

On the other hand, a gas such as air or hot air is guided to the base of the casing 23 by a duct, and this gas blows up from the annular space 37 between the outer peripheral surface of the rotary table 21 and the inner peripheral surface of the casing. Thus, the pulverized fine powder is entrained by the gas and rises between the casings 23 and is subjected to a classification action by the blades 40 of the separator 39 located at the upper part. Sent to the process.
The configuration of the pulverizer itself described above is a known matter as described in Patent Document 1.

  FIG. 2 shows the concept of the layer thickness meter 3, and shows the layer thickness control measuring means and method of the raw material. In FIG. 1, as described above, the pulverizing roller (roller tire) 22 is disposed at a predetermined interval above the outer peripheral side of the rotary table 21, and the raw material 44 is caught and pulverized therebetween.

  In the figure, the square shape indicates the inside of the casing 23, that is, the inside of the pulverizer 1. Another arm 45 is connected to the crushing roller 22 via an arm 32 (not shown), and a measuring element 47 that moves up and down via a fulcrum 46 is fixed to the tip of the crushing roller 22. The measuring element 47 is composed of a rotating element 47A and a stopper 47B which is connected to the arm 45 and moves simultaneously.

An ultrasonic layer thickness gauge 48 is provided facing the measuring element 47, and this ultrasonic layer thickness gauge 48 emits ultrasonic waves to measure the gap between the measuring element 47, that is, the rotary element 47A. The distance between the stopper 47B and the stopper 47B can be measured. This interval is proportional to the layer thickness, and the layer thickness during operation is measured by measuring this interval. The stopper 47B has a function of stopping before the crushing roller 22 comes into direct contact with the rotary table 21.
In the measurement of the layer pressure, a layer pressure gauge using a differential transformer shown in FIG. 4 of Patent Document 1 can be used.

FIG. 3 shows details of the control device 2 in a block diagram.
In FIG. 3, the control device 2 includes a processing unit 61 and a control unit 62. The processing unit 61 includes an input unit 63, a calculation unit 64, and an output unit 65. The control unit 62 includes the layer thickness control unit 50 and the variable speed. The motor control means 67 is comprised.
The signal measured by the layer thickness meter 3 is input to the input means 63 as an A / D converter 71.
A vibration meter 73 may be mounted on the casing 23.

  FIG. 3 shows an example using the vibrometer 73. In this case, the signal measured by the vibration meter 73 is converted into a digital signal by the A / D converter 74 and input to the input means 63 as vibration meter side data 75. The rotation speed of the motor 24 is input to the input means as the rotation speed data 76, and the type and particle size of the raw material are input as the raw material data 77. In addition, raw material supply data 78 is input, and an operation schedule is input. In the case of a fuel in which the raw material is supplied to the boiler, the raw material supply data may be constant during operation or constant every day and night.

  The input means 63 transmits the inputted input signal to the calculation means 64. The calculation means 64 includes a layer thickness prediction measurement means 80, a comparison means 81, a setting data storage means 82, a vibration prediction means 83, a feedford signal generation means 84, and a feedback signal generation means 85, and is a program necessary for various calculation processes. Built-in data.

  The layer thickness prediction calculation means 80 performs layer thickness prediction calculation from the current layer thickness calculation data and raw material supply data based on the operation plan, and generates layer thickness prediction data. In this case, the layer thickness measured by the layer thickness meter 3 corresponding to the operating condition or the corrected layer thickness can be used as the layer thickness prediction data. In addition, an average value of the layer thickness measured for a predetermined time is adopted as the layer thickness. By using this average value, the management of the layer thickness can be more easily adjusted.

The comparison unit 81 compares the layer thickness prediction data with the setting data stored in the setting data storage unit 82. The setting data storage means 82 is a raw material having a predetermined average particle diameter, and the data at a predetermined motor rotation speed, that is, the layer thickness of the raw material to be crushed by the predetermined raw material data and the rotation speed data is a predetermined thin thickness. At this time, predetermined setting data is stored assuming that the vertical crusher 1 has a predetermined magnitude of vibration. This setting data is obtained by an experiment conducted in advance, and is collected as setting data based on the experiment data. A phenomenon in which the vertical crusher 1 vibrates because the variable speed control of the motor 24 can no longer respond when the thickness becomes a predetermined thickness will be described later.
The compared result is transmitted to the vibration prediction means 83. The vibration predicting means 83 determines whether there is vibration of a predetermined magnitude in the vertical crusher 1 based on the rotational speed data 76, the raw material data 77 and the comparison result, and performs vibration prediction.

  When the vibration prediction result indicates that there is vibration of a predetermined magnitude, the feedford signal generation means 84 generates a feedford signal for performing prediction control on the layer thickness and outputs it to the output means 65.

  The vibration predicting means 83 is a vibration prediction in which two vibrations are predicted when a predetermined magnitude of vibration is predicted, and the other one is that the layer thickness is reduced and the vibration is no longer dependent on the rotational speed variation control alone. This is vibration prediction when it cannot be avoided.

  The vibration in this case is caused by the quality of the raw material and the layer thickness of the raw material. By adjusting the thickness of the raw material before the occurrence of vibration, this type of vibration is prevented and continuous operation is possible. In the above case, the layer thickness adjustment control can be performed in a region where vibration can be avoided by the rotational speed variation control, which is desirable, and the switching can be executed by setting conditions in advance.

When the vibration meter 73 is provided to generate the vibration control data 75, the feedback control can also be performed in accordance with the above-described control.
The actually measured vibration value is compared with the setting data stored in the setting data storage means 82 by the comparison means 81, and when the difference between the two exceeds a threshold value, the feedback signal generation means 85 generates a feedback signal. Then, a feedback signal is output to the output means 65.
This feedback signal generation may be performed by using the layer thickness data as described in Patent Document 1.

  The variable speed control of the motor 24 is normally performed by the variable speed electric control means 67 by the feedford signal. As described above, in the case where it is difficult to cope with the variable speed control or the case where vibration is expected when switching is desired, the layer thickness control by the layer thickness control means 50 of the control unit 62 is performed. I do.

  The layer pressure control by the layer thickness control means 50 is to perform predictive control of the raw material supply amount in FIG. In FIG. 1, a raw material supply facility 4 including a raw material supply device 91 and a drive device 92 of the raw material supply device 91 is provided in cooperation with the raw material charging chute 17. In this case, the generated Feedford signal is transmitted alone or transmitted to the drive device 54 (FIG. 3) and supplied to the drive device 92. The drive device 92 adjusts and controls the supply of the raw material to the raw material charging chute 17, can perform the layer thickness control, and can effectively perform the predictive control.

  Another layer thickness control by the layer thickness control means 50 is to control the hydraulic pressure of the hydraulic cylinder 34 by the tension hydraulic pressure control device 90 in FIG. 1 and to perform the predictive control on the pressing force of the crushing roller 22. It is effective in the case of such fuel.

FIG. 4 shows data obtained by actually measuring the vibration generated in the solid crusher. This data shows that the oil coke as a specific raw material is adjusted to a constant particle size, the air flow rate and the crusher inlet / outlet differential pressure are almost constant, and the variable speed motor, that is, the variable speed control by the feedford signal is performed using an inverter. The vibration result is shown. As shown in the figure, it can be seen that the magnitude of vibration can be adjusted by performing variable speed control. In a specific area, it can be seen that the amount of stopper lift (mm), that is, the difference in layer thickness, has a greater effect on the vibration results than variable speed control. It can be read that the vibration can be suppressed by lowering or by both of them. In addition, this experiment showed that the control delay was large depending on the predictive control based on the measurement of the differential pressure between the outlet and the inlet. This shows that the differential pressure and vibration are in a reciprocal relationship, making it difficult to adjust the vibration by measuring the differential pressure. On the other hand, it was found that the vibration control by the layer thickness measurement has a quick response and is easy to adjust. It has been found that even when an operation is performed in which raw material supply is not performed to support the layer thickness, if the layer thickness is reduced, excessive vibration may occur during operation at the layer thickness.
It was recognized that the vibration result similar to the experimental result shown in FIG. 4 changes the vibration generation state and vibration value with respect to the three displacement numbers of the rotation speed data, the raw material data, and the layer thickness data.

  By repeating such an experiment and acquiring experimental data, the setting data storage means 82 is a raw material having a predetermined average particle diameter, and data at a predetermined rotational speed, that is, a known value. Predetermined setting data can be stored assuming that the vertical crusher 1 has a vibration of a predetermined magnitude when the layer thickness of the raw material pulverized by the raw material data and the rotational speed data becomes a predetermined thickness. .

FIG. 5 shows a flowchart for the embodiment.
In the figure, layer thickness prediction data is generated by performing layer thickness prediction calculation based on raw material supply data from the current layer thickness data (S1) of raw materials (S2). This layer thickness prediction data is compared with setting data (S3), and the necessity of prediction control is determined from the vibration value predicted by determination 1 (S4).

If it is not necessary, the process proceeds to step S27. If it is determined that it is necessary, feedford signal generation (1) is performed (S5), and motor variable speed prediction control (S6) is performed to perform vibration. To make it smaller. In such a state, the layer thickness prediction calculation is performed (S7), the comparison is performed as described above (S8), and another determination (2) is performed (S9). The determination in this case is characterized in that it is a determination of the necessity of predictive control under the situation where the rotational speed control is performed.
When the feedford signal generation (2) is made by this determination (S10), the layer thickness prediction control is performed and the continuous operation is continued (S27). Determination 2 is repeated.
In this example, the feedford signal generation (1) is performed first in the first step, but the feedford signal generation (2) is performed first in the first step to change the control method order, and as simultaneous control Also good.

When the vibrometer 73 (FIG. 3) is provided, the vibration value is acquired from the vibration data (S21) (S22), compared with the setting data (S23), and the necessity of feedback control is determined. (S24). If not necessary, the operation is continued (S27), and if necessary, a feedback signal is generated (S25). The feedback signal may be generated after the comparison based on the layer thickness prediction calculation result.
The rotational speed control (variable speed control) is performed by the feedback signal (S26), and the continuous operation is continued.

According to the method described above,
The rotational speed data 76 and the raw material data 77 are input, and when the input layer thickness measurement data 72 from the layer thickness meter 3 and the raw material layer thickness become a predetermined thickness, the vertical crusher 1 is predetermined. The occurrence of a predetermined vibration in the vertical crusher 1 is predicted from the thinness of the layer by comparing a predetermined amount of vibration with a predetermined setting data, and the vibration is predicted when the vibration is predicted. A feed ford signal for avoiding the above is generated, and the feed of the raw material to the vertical crusher 1 is increased based on the feed ford signal. Further, it is possible to control the predicted rotational speed of the motor 24 based on the feedford signal.

  When the raw material layer thickness and the raw material supply amount are measured at the time interval indicated by the operating timer and the actual vibration value is larger than the reference vibration level (for example, 50 μm of single vibration), the rotation is performed when the raw material layer thickness is lower than the set range. Decrease the table rotation speed, and increase the rotation table rotation speed when it is higher than the set range. To avoid this situation when the vibration level is high even though the raw material layer thickness is in the proper range, the raw material supply amount is temporarily reduced, but only the decrease in the raw material layer thickness due to the reduction of the raw material supply amount. It is possible to maintain the same raw material layer thickness by reducing the number of rotations of the rotary table. Further, when the vibration level is within the reference level and the raw material supply amount is less than the rated value, the raw material supply amount is increased. At this time, the number of rotary tables is increased by an amount corresponding to the raw material layer thickness so as not to fluctuate.

  By performing automatic control with the Feedford signal mechanism as described above, the vibration value suddenly increases, or the moisture content of the feedstock suddenly decreases (or increases) during operation, resulting in a decrease in grinding efficiency. Even if the biting becomes worse and the vibration value increases, the above operation improves the raw material supply amount and the raw material layer thickness. Can be returned to.

The figure containing the partial cross section which shows the structure of the Example of this invention. The figure which shows the layer thickness measurement means and method of a raw material. The block diagram which shows the Example of this invention. Measured map for data acquisition. The flowchart figure of the Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vertical crusher, 2 ... Control apparatus, 3 ... Thickness meter, 4 ... Raw material supply equipment, 21 ... Rotary table, 22 ... Grinding roller, 23 ... Cylindrical casing, 36 ... Dam ring, 38 ... Gas supply Means, 41 ... outlet, 47 ... measuring element, 50 ... layer thickness control means, 61 ... processing section, 62 ... control section, 63 ... input means, 64 ... calculation means, 65 ... output means, 67 ... variable speed motor control Means 72 ... Layer thickness measurement data, 75 ... Vibration measurement data, 76 ... Revolution data, 77 ... Raw material data, 78 ... Raw material supply data, 80 ... Layer thickness prediction calculation means, 81 ... Comparison means, 82 ... Setting data storage Means 83 ... Vibration prediction means 84 ... Feedford signal generation means 90 ... Tension hydraulic control device 91 ... Raw material supply device 92 ... Drive device 100 ... Grinding equipment

Claims (7)

A casing, a rotary table disposed in the casing, a crushing roller disposed above the outer peripheral portion of the rotary table, a raw material supply means for supplying a raw material into the casing, and the casing. A pulverized product discharging means, and a vertical crusher that applies a predetermined crushing force to the crushing roller to crush the raw material between the upper surface of the rotary table and the peripheral surface of the crushing roller, the rotary table in operation, and the In a crushing facility comprising a layer thickness meter for measuring a layer thickness of a raw material between a crushing roller, a variable speed electric motor for driving the rotary table, and a control device for changing the rotation speed of the variable speed electric motor,
The control device inputs rotation speed data, raw material data, and raw material supply data, and when the predetermined raw material layer thickness becomes a predetermined thickness, the vertical crusher has a predetermined magnitude of vibration. Setting data storage means for storing predetermined setting data, and
Generation of vibration of a predetermined magnitude in the vertical crusher from the thin layer thickness by comparing the input layer thickness measurement data from the layer thickness meter with the setting data stored in the setting data storage means Vibration prediction means for predicting
Feedford signal generating means for generating a feedford signal for avoiding the vibration when the vibration is predicted;
And a feedford signal is output to the layer thickness control means. 2. The facility according to claim 1, wherein the control device outputs the feedford signal generated when the vibration is predicted to a variable speed motor control means. In Claim 1 or 2, a vibration meter is attached to the casing, and the setting data storage means stores predetermined setting data that the vertical crusher has a predetermined magnitude of vibration, and The control device includes feedback signal generation means for comparing the input vibration measurement data from the vibrometer with the setting data stored in the setting data storage means to generate a feedback signal for reducing vibration. Features crushing equipment. 2. The layer thickness control means according to claim 1, wherein when the feedford signal is generated, the layer thickness control means controls a driving device of a raw material supply apparatus that supplies the raw material to the raw material supply means to increase the supply of the raw material. A crushing facility characterized by being. A casing, a rotary table disposed in the casing, a pulverizing roller disposed above the outer periphery of the rotary table, a raw material supply means for supplying a raw material into the casing, and the casing A pulverized product discharging means, and a vertical crusher that applies a predetermined crushing force to the crushing roller to crush the raw material between the upper surface of the rotary table and the peripheral surface of the crushing roller, the rotary table in operation, and the A control device for a pulverization facility comprising a layer thickness meter for measuring a layer thickness of a raw material between the pulverization roller, a variable speed electric motor for driving the rotary table, and a control device for changing the rotational speed of the variable speed electric motor. ,
The control device assumes that the vertical crusher has a predetermined magnitude of vibration when the predetermined raw material layer thickness becomes a predetermined thickness.
Setting data storage means for storing predetermined setting data;
For a predetermined raw material, the input layer thickness measurement data from the layer thickness meter is compared with the setting data stored in the setting data storage means, and the variable speed motor is set in accordance with a predetermined operation schedule. Vibration predicting means for predicting the occurrence of vibration of a predetermined magnitude in the vertical crusher from the thin layer thickness when the variable speed control was performed;
Feedford signal generating means for generating a feedford signal for avoiding the vibration when the vibration is predicted;
And a feed ford signal is output to the layer thickness control means. A casing, a rotary table disposed in the casing, a crushing roller disposed above the outer periphery of the rotary table, a raw material supply means for supplying the raw material into the casing, and the casing. A pulverized product discharging means, and a vertical crusher that applies a predetermined crushing force to the crushing roller to crush the raw material between the upper surface of the rotary table and the peripheral surface of the crushing roller, the rotary table in operation, and the In a raw material supply method in a pulverization facility comprising a layer thickness meter for measuring a layer thickness of a raw material between a pulverizing roller, a variable speed electric motor for driving the rotary table, and a control device for changing the rotational speed of the variable speed electric motor,
The rotational speed data, the raw material data and the raw material supply data are input, and when the layer thickness meter data and the raw material layer thickness input from the layer thickness meter become a predetermined thickness, the vertical crusher is preliminarily stored. The occurrence of a predetermined vibration in the vertical crusher is predicted from the thinness of the layer by comparing the vibration having a predetermined magnitude with preset setting data, and when the vibration is predicted, A raw material supply method in a pulverization facility, characterized in that a feedford signal for avoiding vibration is generated, and supply of the raw material to the vertical crusher is increased based on the feedford signal. 7. The raw material supply method in a pulverization facility according to claim 6, wherein when the supply of the raw material is restricted, control is performed to reduce the speed of the variable speed electric motor.

Images