JP2002295976A - Control method for rotary kiln, controller for rotary kiln and program for controlling rotary kiln - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller for a rotary kiln in which a stability can be maintained by performing a simple adjustment to a model error generated in an actual process. SOLUTION: A first controller for operating an amount of feeding of charged material in accordance with a kiln electric power tendency and a kiln electric power deviation based on the operating state of the rotary kiln detected in a prescribed period, so as to obtain the target values of kiln power and burning point temperature of the rotary kiln 200 by using the set kind of a material to be incinerated and the fed amount of charged material; or a second controller for operating the rotating speed of the kiln and the amount of burning coal of the kiln on the basis of the kiln electric power tendency and the burning temperature tendency is selected to control the operating state of the rotary kiln 200 by the selected controller. As a result, the controller for the rotary kiln excellent in stability and easily controlled can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary kiln control method and a rotary kiln control apparatus for stabilizing the steady-state operation of a rotary kiln in manufacturing a cement clinker by calcining a calcareous material or the like with a rotary kiln. Things.

[0002]

2. Description of the Related Art Conventionally, when a calcareous material or the like is calcined in a rotary kiln to produce a cement clinker or the like, a method of controlling the rotary kiln is performed by using an optimal control or fuzzy control. Feed power of the rotary kiln), operating speed of the rotary kiln (kiln speed), amount of coal to be fed into the rotary kiln (kiln coal firing), driving power of the rotary kiln (kiln power), combustion temperature inside the rotary kiln (burning temperature) Was often controlled. However, in rotary kilns, due to fluctuations in the components of the input raw materials, fluctuations in the combustibility of coal, differences in abilities depending on the type, and changes in the timekeeping of facilities over time, etc. Coal firing, kiln power, and burning temperature "
In any of the cases, a mismatch between the actual process and the model (model error) may occur.

Therefore, while the method using the optimal control is excellent in controllability, it is difficult to provide the integral characteristic in a process in which the accuracy of the control model is not good or a model error occurs. If such a problem occurs, there is a problem that the operational stability of the rotary kiln cannot be guaranteed. Furthermore, there is a problem that the controllability is not good because the dead time of the process is long and the time constant and the dead time greatly differ depending on the operation variables.

In many cases, the fuzzy control method creates a control rule based on a result of hearing from an operator, so that it is difficult to guarantee stability in terms of control theory. Further, when a model error occurs in the process, there is also a problem that the adjustment cannot be easily made because of a large number of rules or a rule having no theoretical basis.

As described above, in the above-described method of controlling the rotary kiln by the optimal control or the fuzzy control,
Due to model errors and long dead times in the process,
There were problems that stability was not guaranteed and control was difficult.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is an object of the present invention to maintain stability by simply adjusting model errors caused in a process due to various causes. It is an object of the present invention to provide a robust rotary kiln control method and a rotary kiln control device that can easily control a process with a long dead time.

[0007]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 detects a driving power of a rotary kiln and a burning point temperature of the rotary kiln at a predetermined cycle. In the rotary kiln control method for controlling the input amount of the raw material to be input into the rotary kiln and the supply amount of the fuel and the rotation speed of the rotary kiln, a plurality of types of operating conditions of the rotary kiln are set in storage means, Selecting an operating condition, detecting the operating state of the rotary kiln in the predetermined cycle and storing the operating state in the storage unit, and in each cycle, a first controller for controlling the rotary kiln based on the operating state or Control by at least two types of controllers of the second controller Selecting one control method from no more of the control method, the first controller or the second controller is characterized in that for controlling the rotary kiln by a predetermined algorithm.

Further, according to the present invention, in the above-described method for controlling a rotary kiln, the operating conditions of the rotary kiln set in the storage means correspond to a type of a substance to be fired in the rotary kiln and an input amount of a raw material to be input to the rotary kiln. It is characterized by being a coefficient. Further, according to the present invention, in the above-described method for controlling a rotary kiln, the operating state of the rotary kiln detected at the predetermined cycle may include a driving power of the rotary kiln, a burning point temperature of the rotary kiln, a rotation speed of the rotary kiln, and an input to the rotary kiln. It is characterized by including a raw material input amount and a fuel supply amount.

Further, according to the present invention, in the above-described method for controlling a rotary kiln, the condition that the first controller is selected is a time series in which at least the driving power of the rotary kiln detected in the current cycle is stored in the storage means. The driving power of the rotary kiln is equal to or greater than the driving power of the rotary kiln, and the input amount of the raw material to be input to the rotary kiln detected in the current cycle is less than a predetermined upper limit, and the driving power of the rotary kiln detected in the current cycle is the predetermined power. Is less than the upper limit value of.

Further, according to the present invention, in the above-described method of controlling a rotary kiln, the condition that the second controller is selected may be a time series in which at least the driving power of the rotary kiln detected in the current cycle is stored in the storage means. If the amount of raw material input to the rotary kiln or the drive power of the rotary kiln detected in the current cycle is equal to or greater than the drive power of the past rotary kiln and the drive power of the rotary kiln is equal to or greater than the predetermined upper limit, or is detected in the current cycle The driving power of the rotary kiln thus set is characterized by a tendency to decrease as compared with the driving power of the time-series rotary kiln stored in the storage means.

Further, according to the present invention, in the above-described method for controlling a rotary kiln, the predetermined algorithm of the first controller is configured to determine a current power of the rotary kiln based on a past detection value stored in the storage unit. The input of the raw material to be input to the rotary kiln by predicting the drive power and the burning point temperature of the rotary kiln based on the direction of change to the detected value and the deviation between the detected value of the current cycle regarding the drive power of the rotary kiln and a predetermined target value. The amount is determined. Further, according to the present invention, in the above-described method for controlling a rotary kiln, the predetermined algorithm of the second controller is configured to convert a past detection value stored in the storage unit regarding the driving power of the rotary kiln from a detection value of the current cycle to a detection value of the current cycle. And the deviation between the detected value of the current cycle and the predetermined target value, and the direction of change from the past detected value stored in the storage means for the burning temperature to the detected value of the current cycle and the current cycle. The drive power and the burning point temperature of the rotary kiln are predicted based on the detected value and the deviation between the predetermined target value, and the rotational speed of the rotary kiln and the supply amount of fuel to be supplied to combustion means are determined. Features.

Further, the present invention detects the driving power of the rotary kiln and the burning temperature of the rotary kiln at a predetermined cycle to control the input amount of the raw material to be input to the rotary kiln, the supply amount of the fuel, and the rotation speed of the rotary kiln. In the rotary kiln control device to perform, storage means for storing a plurality of types of operating conditions of the rotary kiln set, selecting means for selecting the operating conditions,
Detecting means for detecting the operation state of the rotary kiln; storage means for storing the detected operation state; and the set operation conditions, the detected operation state, and the past operation stored in the storage means First based on the state
A first controller that controls the rotary kiln according to the algorithm of the above, and a second algorithm based on the set operating conditions, the detected operating state, and the past operating state stored in the storage means. And a control by at least two types of controllers, the first controller or the second controller, based on the detected operation state and a past operation state stored in the storage means. Control means for selecting and switching any one of a plurality of types of control algorithms including

In the rotary kiln control apparatus according to the present invention, the operating condition of the rotary kiln set in the storage means may be a parameter corresponding to a type of a substance to be fired in the rotary kiln and an input amount of a raw material to be input to the rotary kiln. It is characterized by being. Further, in the above-described rotary kiln control device, the operation state of the rotary kiln, which is detected at the predetermined cycle, is the driving power of the rotary kiln, the burning point temperature of the rotary kiln, the number of rotations of the rotary kiln, and the rotary kiln. It is characterized by including a raw material input amount and a fuel supply amount. Further, in the above-described rotary kiln control device, the condition in which the first controller is selected is that the driving power of the rotary kiln in a time series is stored in the storage unit at least in the driving power of the rotary kiln detected in the current cycle. When the amount of raw material input to the rotary kiln detected in the current cycle is less than a predetermined upper limit value, and the driving power of the rotary kiln detected in the current cycle is less than the predetermined upper limit value. In some cases, it is characterized by

Further, according to the present invention, in the above-described rotary kiln control apparatus, the condition for selecting the second controller is at least a time series in which the driving power of the rotary kiln detected in the current cycle is stored in the storage means. If the input power of the raw materials to be input to the rotary kiln or the driving power of the rotary kiln detected in the current cycle is equal to or greater than the predetermined upper limit value, or is detected in the current cycle. The driving power of the rotary kiln thus set is characterized by a tendency to decrease as compared with the driving power of the time-series rotary kiln stored in the storage means.

According to the present invention, in the above-described rotary kiln control device, the predetermined algorithm of the first controller is configured to detect a current cycle from a past detection value stored in the storage unit with respect to the driving power of the rotary kiln. The amount of raw material to be supplied to the rotary kiln by predicting the driving power and the burning temperature of the rotary kiln based on the direction of change to the value and the deviation between the current cycle detected value and the predetermined target value for the driving power of the rotary kiln. Is determined.

According to the present invention, in the above-described rotary kiln control apparatus, the predetermined algorithm of the second controller is configured such that a detected value of the current cycle is obtained from a past detected value of the rotary kiln driving power stored in the storage means. The direction of change to the detected value of the present cycle and the deviation between the predetermined target value and the detected value of the burning temperature and the direction of change to the detected value of the present cycle from the past detected value stored in the storage means. A driving power and a burning temperature of the rotary kiln are predicted based on a deviation between the detected value of the rotary kiln and a predetermined target value to determine a rotation speed of the rotary kiln and a supply amount of fuel to be supplied to the combustion means. It is characterized by the following.

Further, according to the present invention, the driving power of the rotary kiln and the burning temperature of the rotary kiln are detected at a predetermined cycle to control the input amount of the raw material to be input to the rotary kiln, the supply amount of the fuel, and the rotation speed of the rotary kiln. A rotary kiln control program for storing, in a plurality of types of storage means, a coefficient corresponding to a type of a substance to be calcined in the rotary kiln and an input amount of a raw material to be input to the rotary kiln, which are operating conditions of the rotary kiln; Selecting the operating state of the rotary kiln and periodically storing the operating state in the storage unit; and in each of the cycles, the detected operating state and the past operation stored in the storage unit. Control the rotary kiln based on status Selecting one of a plurality of types of control processes including control by at least two types of controllers, a first controller or a second controller, wherein the first controller or the second controller is configured to perform the setting. Based on the operating condition and the operating state detected in the current cycle and the operating state stored in the storage means, a procedure for predicting the power and the burning temperature of the rotary kiln and determining an operation amount; Controlling the rotary kiln based on the determined operation amount.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary kiln control device according to an embodiment of the present invention will be described below with reference to FIG.
FIG. 1 is a block diagram of a rotary kiln control device according to the embodiment. In FIG. 1, reference numeral 100 denotes the input unit 12
This is a raw material input device for inputting the raw material 110 into the raw material. The rotary kiln 200 burns the clinker 130 by rotating the raw material 110 charged from the charging unit 120 while rotating by a kiln burner 220 by a combustion device 210. 310 is a burning temperature detector for detecting the burning temperature of the rotary kiln 200, 320 is an O ₂ detector for detecting the amount of oxygen (O ₂ ) in the fuel device 210 (furnace O ₂ ), and 330 is supplied to the rotary kiln 200 This is a power detector for detecting the amount of power being supplied. Reference numeral 400 denotes a kiln drive control device that controls driving of the rotary kiln 200. Reference numeral 500 denotes a kiln feed amount, a kiln power, and a kiln coal firing amount to be input to the rotary kiln 200 according to the operating state of the rotary kiln 200 detected by the burning temperature detector 310, the O ₂ detector 320, and the power detector 330. Is a control device that controls the operation state of the rotary kiln 200 by controlling the operation of the rotary kiln 200. Reference numeral 600 denotes an input device for setting and specifying operating conditions of the rotary kiln 200.

Next, the control device according to the present embodiment will be described in detail with reference to FIG. FIG. 2 is a block diagram showing a configuration of the control device 500 shown in FIG. In FIG. 2, reference numeral 510 denotes a burning temperature detector 31 at a predetermined cycle.
The control unit has a function of selecting and switching either the first controller 530 or the second controller 540 based on the operation state of the rotary kiln detected by each detector such as 0. The storage unit 520 stores operating conditions of the rotary kiln (combustion type, kiln feed rate, etc.) input from the input device 600 of FIG. 1 or an external device (not shown), and the burning temperature detector 310 and the like. In addition to storing a detection value detected by the detector, a program executed by the control unit 510 is also stored.

Then, the first controller 530 determines the operating condition and operating state stored in the storage unit 520 and the kiln power value detected by the power detector 330 based on the kiln power value.
The kiln power value and the baking point temperature of the rotary kiln 200 are predicted to determine the manipulated variable of the kiln feed rate, and the kiln feed rate is controlled based on the result. In addition, the second controller 540 determines the operating condition and operating state stored in the storage unit 520, and based on the burning temperature and kiln power value detected by the burning temperature detector 310 and the power detector 330. The kiln power and the burning temperature of the rotary kiln 200 are predicted to determine the operation amounts of the kiln rotation speed and the kiln coal firing amount, and the kiln rotation speed and the kiln coal firing amount are controlled based on the results.

Next, the first controller 530 and the second
An algorithm for calculating an operation amount used for controlling the operation state of the rotary kiln in the controller 540 will be described. The following algorithm applies the model prediction control theory to the control of a rotary kiln. The first selected by the control unit 510
Either the controller 530 or the second controller 540 performs the calculation according to the following matrix. Y _p = Y + A ₀ ΔU ₀ (1) Y _R = (1−α) R + α (2) ΔU _n = (A _F ^T A _F ) ^-1 + A _F ^T (Y _R −Y−A ₀ ΔU) ₀ )... (3) where Y _p is the predicted value of the controlled variable Y is the measured value of the controlled variable Y _R is the reference trajectory value of the controlled variable _AF , A ₀ is the step response coefficient of the controlled variable ΔU ₀ is the past operation change amount .DELTA.U _n reference trajectory parameters (0-1) is operated change amount alpha R is the target value a _F ^T is a _F of the transposed matrix (a _F ^T a _F) ^-1 is the inverse matrix of a _F ^T a _F Then, the first controller 530 or the second controller 540 calculates the change amount (operation amount) Δ obtained by Expression (3).
And controls the rotary kiln on the basis of U _n.

Next, the above equations (1) to (3) are used.
Step response coefficient A_F, A₀And reference orbit parameters
The data α will be described with reference to FIG. FIG. 3 is FIG.
The first controller 530 and the second controller shown in FIG.
Step response coefficient A used in step 540_F, A₀And ginseng
FIG. 6 is a diagram illustrating an illumination trajectory parameter α. In FIG.
Seeds are the type of cement clinker to be fired, kiln capacity and
Is the amount of raw materials sent to the kiln. The values shown in FIG.
Is set from the input device or from another adjustment system.
And stored in the storage unit 520 of FIG. And the second
First controller 530 and second controller 540
Indicates the type and kiln entered by the operator, etc.
Stored in the storage unit 520 corresponding to the capacity (feeding rate of raw materials into the kiln)
Step response coefficient A_F, A₀And reference path
Equations (1) to (3) are calculated using the parameter α. An example
For example, the operating condition is normal cement, kiln capacity
Is N ₁When the following is input, the first controller 5
30 is a step response coefficient A_{F 11}And A₀₁₁, Reference orbit para
Meter α₁₁Will be calculated using In addition, the second
Controller 540 calculates the step response coefficient A_F21And A₀₂₁,
Reference trajectory parameter α _{twenty one}Will be used.

Next, the first controller 530 and the second
The controller 540 calculates and outputs information (control amount) detected and input by each of the detectors such as the burning temperature detector 310 and the O ₂ detector 320 according to the above equations (1) to (3). The relationship between the information (operation amount) to be performed will be described with reference to FIGS.

FIG. 4 shows that the first controller 530 is (1)
A control amount (kiln power) used in the calculation of Expressions (3) to (3);
It is the figure which visualized and showed the relationship of the operation amount (a kiln raw material feed amount) which is a calculation result by Formula (1)-Formula (3).
In FIG. 4, the kiln power tendency is represented by the first controller 5.
30 is compared with the past kiln power stored in the storage unit 520.
↑ indicates an upward trend, → indicates an equivalent, and ↓ indicates a downward trend. The kiln power deviation is calculated by comparing the kiln power value detected in the current cycle with a preset kiln power target value,
+ Indicates high, 0 indicates the same, and-indicates low.

The feed rate of the kiln material is calculated by the first controller 530 in the present cycle and the feed rate of the kiln material with respect to the current set value stored in the storage unit 520 is represented by ↑. , → indicate the same, and ↓ indicate that the first controller 530 controls the amount to be reduced. Therefore, for example, in the case of the operation pattern 1, the rotary kiln 20
Since the power of 0 is falling and falls below the target value,
This indicates that the sintering state of the weight loss in the rotary kiln 200 is in a deteriorating tendency, and in order to adjust this, the first controller 530 controls the raw material input device 100 to feed the raw materials to the rotary kiln 200, that is, feed the raw materials to the kiln. This indicates that control is performed to reduce the amount.

Next, FIG. 5 shows the control amounts (kiln power, burning temperature) used by the second controller 540 in the calculation of the equations (1) to (3) and the equations (1) to (3). It is the figure which visualized and showed the relationship of the operation amount (kiln rotation speed, kiln coal burning amount) which is a calculation result. In FIG. 5, the kiln power tendency is the same as the kiln power tendency in FIG. As for the tendency of the burning temperature, 焼 is increased, → is equal, and the burning temperature detected in the current cycle inputted to the second controller 540 is compared with the past burning temperature stored in the storage unit 520.
↓ indicates a downward trend.

The kiln rotation speed is calculated by the second controller 540 in the present cycle and the kiln rotation speed is compared with the current kiln rotation speed set value stored in the storage unit 520, and Δ is increased. Speed, 0 is the same, ↓ is to decelerate,
It shows that the second controller 540 controls.
The kiln coal firing amount is calculated by the second controller 540 in the current cycle, and the kiln coal firing amount is compared with the current kiln coal firing setting value stored in the storage unit 520. Indicates the same, and ↓ indicates that the second controller 540 controls to decrease the weight. Therefore,
For example, in the case of the operation pattern 1, the rotary kiln 2
Since the power of 00 is decreasing and the burning temperature is decreasing, the second controller 540 reduces the rotation speed of the rotary kiln 200 and adjusts the combustion device 210 to adjust the combustion state of the rotary kiln 200. This indicates that control is performed so as to increase the supplied coal amount, that is, the kiln coal burning amount.

Next, with reference to FIG.
The operation of the rotary kiln control device will be described. Figure
6 shows the operation of the rotary kiln control device according to the present embodiment.
It is a flowchart which shows a work. The control unit 510 is in the current cycle
Stored in the storage unit 520 from the kiln power detected in
Subtract the past kiln power to determine the kiln power slope.
(Step S1), the kiln power gradient is “0” or more (≧
0) In other words, if the kiln power is on the rise,
_TwoDeviation (= kiln butt O detected in this cycle)_TwoValue-kiln bottom O _TwoEyes
(Standard value) (step S2). Kiln butt O_TwoDeviation is
If it is lath (> 0), set the capacity detected in this cycle
Whether the value (kiln feed rate) has not reached the upper limit.
It is determined (step S3), and the ability set value reaches the upper limit value.
If not (<upper limit), the kiln power reaches the upper limit
It is determined whether or not it has been performed (step S4). Kiln
If the power has not reached the upper limit (<upper limit),
The control unit 510 selects the first controller 530. First
The controller 530 calculates the above equations (1) to (3).
And controls the material input device 100 based on the calculation result.
To adjust the feed rate of the raw material into the kiln (step S5).

If the kiln bottom O ₂ deviation is less than or equal to 0 (≦ 0) in step S2, it is checked whether the burning temperature detected in the current cycle has reached the target value (step S7). When the burning point temperature is equal to or higher than the target value (≧ target value), the coal firing value is calculated using the formula of coal firing value = setting value−coefficient × kiln bottom O ₂ deviation, and the calculated coal firing value is calculated. The setting value of the burning amount is set as a new setting value of the burning amount in the storage unit 520 (step S8). When the burning temperature is lower than the target value (<target value), the capacity setting value = the setting value−the coefficient ×
The capacity setting value is calculated using the equation of the kiln bottom O ₂ deviation, and the calculated capacity setting value is set in the storage unit 520 as a new capacity or a set value of the material feed amount (step S9).

If the capability setting value is equal to or more than the upper limit value (≧ upper limit value) in step S3, or if the value in step S4 is satisfied.
When the kiln power is equal to or more than the upper limit value (≧ the upper limit value), the control unit 510 selects the second controller 540. The second controller 540 is based on the above equation (1).
Formula (3) is calculated, and based on the calculation result, the kiln drive control device 400 and the combustion device 210 are controlled to adjust the kiln rotation speed and the kiln coal burning amount of the rotary kiln 200 (step S6).

Next, in step S1, when the kiln power slope is less than 0 (<0) determines the kiln inlet O ₂ deviations (step S10). Kiln bottom O ₂ deviation is less than 1 (<
In the case of 1), it is determined whether the burning temperature has reached the target value (step S11). If the burning point temperature has not reached the target value (≦ target value), control unit 510
Calculates the capacity setting value (kiln-feeding material feed rate) using the formula of capacity setting value = setting value−reduction amount, and sets the calculated capacity setting value as a new setting value in the storage unit 520 (step S).
12). When the kiln bottom O ₂ deviation is 1 or more (≧ 1) in step S10, or when the burning temperature exceeds the target value (> target value) in step S11,
The control unit 510 selects the second controller 540. The second controller 540 calculates the above equations (1) to (3), and based on the calculation results, the kiln drive control device 40
0 and the combustion device 210 to control the rotary kiln 2
The number of kiln revolutions and the amount of coal to be supplied, that is, the amount of kiln coal fired, are adjusted (Step S13).

The rotary kiln 20 shown in FIG.
A CO detector for detecting the amount of carbon dioxide (CO) is provided in the vicinity of the kiln burner 220 of 0, and only when the CO detected by the CO detector exceeds the lower limit in step S7 of FIG. It may be determined whether or not the upper limit has been reached.

[0033]

As described above, according to the present invention, the kiln power and the baking temperature of the rotary kiln are set to a predetermined value at a predetermined cycle by using the set type of the burning substance and the feed rate of the kiln material. Operate the kiln feed rate based on the detected kiln power trend and kiln power deviation to reach the target value, or based on the detected kiln power trend, kiln power deviation, burning point temperature tendency and firing temperature deviation. In order to control the number of kiln revolutions and the amount of kiln coal fired, switching and control are performed according to the operating state of the rotary kiln. As a result, it is possible to make it less susceptible to model errors caused by fluctuations in raw material components, fluctuations in coal flammability, and differences in varieties, and to ensure stability with simple adjustments. Control of a process with a long dead time is also facilitated. In addition, since the control can be performed automatically, it is not necessary for the operator to manually operate based on experience, intuition, and the like, so that the load on the operator can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a rotary kiln control device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control device according to the embodiment.

FIG. 3 is a diagram showing coefficients required for control of a first controller and a second controller according to the embodiment.

FIG. 4 is a diagram showing a relationship between a control amount and an operation amount of a first controller according to the embodiment.

FIG. 5 is a diagram showing a relationship between a control amount and an operation amount of a second controller according to the embodiment.

FIG. 6 is a flowchart showing an operation of the rotary kiln control device according to the embodiment.

[Explanation of symbols]

100: raw material charging device, 110: raw material, 120: charging section, 130: clinker, 200: rotary kiln, 2
10 ... combustion apparatus, 220 ... Kirunbana, 310 ... burn point temperature detector, 320 ... O ₂ detector, 330 ... power detector, 400 ... kiln drive controller, 500 ... control device,
510: control unit, 520: storage unit, 530: first controller, 540: second controller, 600: input device

Continued on the front page F term (reference) 4G012 KA03 4K056 AA12 BA06 BB01 CA08 FA03 FA13 4K061 AA08 BA01 GA01 GA02

Claims (15)

[Claims] 1. A method of controlling a rotary kiln for detecting a driving power of a rotary kiln and a burning point temperature of the rotary kiln at a predetermined cycle to control an input amount of a raw material to be input to the rotary kiln, a supply amount of fuel, and a rotation speed of the rotary kiln. In, the operating conditions of the rotary kiln are set in a plurality of types of storage means, operating conditions of the rotary kiln are selected, the operating state of the rotary kiln is detected at the predetermined cycle, and stored in the storage means, In each cycle, one control method is selected from a plurality of control methods including control by at least two types of controllers, a first controller or a second controller that controls the rotary kiln based on the operation state, A first controller or a second controller Rotary kiln control method, wherein the chromatography La is to control the rotary kiln by a predetermined algorithm. 2. The operating condition of the rotary kiln set in the storage means is a coefficient corresponding to a type of a substance to be fired in the rotary kiln and an input amount of a raw material to be input to the rotary kiln. The control method of the rotary kiln described in the above. 3. The operation state of the rotary kiln detected at the predetermined cycle includes a driving power of the rotary kiln,
The method of controlling a rotary kiln according to claim 1, further comprising a baking temperature of the rotary kiln, a number of rotations of the rotary kiln, a supply amount of a raw material to be supplied to the rotary kiln, and a supply amount of a fuel. 4. The condition under which the first controller is selected is such that at least the drive power of the rotary kiln detected in the current cycle is equal to or greater than the drive power of the time-series rotary kiln stored in the storage means. And the amount of the raw material to be injected into the rotary kiln detected in the current cycle is less than a predetermined upper limit, and the driving power of the rotary kiln detected in the current cycle is less than a predetermined upper limit. The method for controlling a rotary kiln according to claim 3. 5. The condition that the second controller is selected is such that at least the drive power of the rotary kiln detected in the current cycle is equal to or greater than the drive power of the rotary kiln in the time series past stored in the storage means. If there is a tendency, and the input amount of raw materials to the rotary kiln or the driving power of the rotary kiln detected in the current cycle is equal to or more than a predetermined upper limit, or the driving power of the rotary kiln detected in the current cycle is stored in the storage means. 4. The control method for a rotary kiln according to claim 3, wherein the driving power is decreasing as compared with the driving power of the rotary kiln in the time series. 6. The predetermined algorithm of the first controller includes: a direction in which a drive power of the rotary kiln is changed from a past detected value stored in the storage unit to a detected value of the current cycle; and a drive power of the rotary kiln. A driving power and a baking temperature of the rotary kiln are predicted based on a deviation between a detected value of the current cycle and a predetermined target value with respect to the current cycle, and an input amount of a raw material to be input to the rotary kiln is determined. The method for controlling a rotary kiln according to claim 3. 7. The predetermined algorithm of the second controller includes: a direction in which a drive power of the rotary kiln is changed from a past detection value stored in the storage means to a detection value of the current cycle; and a detection value of the current cycle. The direction of change from the past detected value stored in the storage means to the detected value of the current cycle and the detected value of the current cycle and the predetermined target value. 4. The rotary kiln according to claim 3, wherein a driving power and a burning temperature of the rotary kiln are predicted based on the deviation to determine a rotation speed of the rotary kiln and a supply amount of fuel to be supplied to combustion means. 5. Control method. 8. A rotary kiln control device for detecting the driving power of the rotary kiln and the burning point temperature of the rotary kiln at a predetermined cycle to control the input amount of the raw material to be input to the rotary kiln, the supply amount of the fuel, and the rotation speed of the rotary kiln. , Storage means for storing a plurality of types of operating conditions of the rotary kiln set; selecting means for selecting the operating conditions; detecting means for detecting the operating state of the rotary kiln; and storing the detected operating state. Storage means, a first controller for controlling the rotary kiln by a first algorithm based on the set operation conditions, the detected operation state, and a past operation state stored in the storage means, The set operation condition, the detected operation state, and the storage unit A second controller that controls the rotary kiln based on a stored past operation state by a second algorithm, based on the detected operation state and a past operation state stored in the storage unit; And control means for selecting and switching any one of a plurality of types of control processes including control by at least two types of controllers, the first controller and the second controller. Rotary kiln controller. 9. The operating condition of the rotary kiln set in the storage means is a parameter corresponding to a type of a substance to be fired in the rotary kiln and an input amount of a raw material to be input to the rotary kiln.
2. The rotary kiln control device according to 1. 10. The operating state of the rotary kiln detected at the predetermined cycle includes a driving power of the rotary kiln, a burning point temperature of the rotary kiln, a number of rotations of the rotary kiln, an input amount of a raw material to be input to the rotary kiln, and a supply of fuel. 10. The rotary kiln control device according to claim 8, wherein the rotary kiln control device includes an amount. 11. The condition under which the first controller is selected is such that at least the drive power of the rotary kiln detected in the current cycle is equal to or greater than the drive power of the time-series rotary kiln stored in the storage means. And the input amount of the raw material to the rotary kiln detected in the current cycle is less than a predetermined upper limit, and the driving power of the rotary kiln detected in the current cycle is less than the predetermined upper limit. The rotary kiln control device according to claim 10, wherein 12. The condition that the second controller is selected is at least equal to or greater than the drive power of the rotary kiln in the time series stored in the storage means, for the drive power of the rotary kiln detected in the current cycle. If there is a tendency and the input amount of raw materials to be input to the rotary kiln or the driving power of the rotary kiln detected in the current cycle is equal to or more than a predetermined upper limit, or the driving power of the rotary kiln detected in the current cycle is stored in the storage means. The rotary kiln control device according to claim 10, wherein the driving power is lower than the driving power of the rotary kiln in a time series. 13. The predetermined algorithm of the first controller includes: a direction in which a drive power of the rotary kiln is changed from a past detected value stored in the storage unit to a detected value of the current cycle; and a drive power of the rotary kiln. A driving power and a burning temperature of the rotary kiln are predicted based on a deviation between a detected value of the current cycle and a predetermined target value with respect to the current cycle, and an input amount of a raw material to be input to the rotary kiln is determined. The rotary kiln control device according to claim 10. 14. The predetermined algorithm of the second controller includes: a direction in which the rotary kiln drive power changes from a past detection value stored in the storage unit to a detection value of the current cycle; and a detection value of the current cycle. A deviation from a predetermined target value, and a direction of change from a past detection value stored in the storage means to the detection value of the current cycle regarding the burning point temperature, and a deviation between the detection value of the current cycle and the predetermined target value. 11. The method according to claim 10, further comprising: predicting a driving power and a baking temperature of the rotary kiln based on the rotation speed and determining a rotation speed of the rotary kiln and a supply amount of fuel to be supplied to the combustion unit. Rotary kiln controller. 15. A rotary kiln control for detecting the driving power of the rotary kiln and the burning point temperature of the rotary kiln at a predetermined cycle to control the input amount of the raw material to be input to the rotary kiln, the supply amount of the fuel, and the rotation speed of the rotary kiln. A step of storing, in a program, a plurality of types of coefficients corresponding to a type of a substance to be calcined in the rotary kiln and an input amount of a raw material to be input to the rotary kiln, which are operating conditions of the rotary kiln; and selecting operating conditions of the rotary kiln. A step of periodically detecting an operation state of the rotary kiln and storing the operation state in the storage unit; and in each of the cycles, based on the detected operation state and a past operation state stored in the storage unit. A first core for controlling the rotary kiln A step of selecting any one of a plurality of types of control processes including control by at least two types of controllers such as a controller and a second controller; and a step in which the first controller or the second controller determines the set operating conditions. Based on the operation state detected in the current cycle and the operation state stored in the storage unit,
A rotary kiln control program for executing a procedure of determining an operation amount by predicting power and a burning temperature of the rotary kiln; and a step of controlling the rotary kiln based on the determined operation amount.