JP7039794B2 - Deterioration diagnosis device of crusher, crushing system, and deterioration diagnosis method - Google Patents

Description

The present invention relates to a deterioration diagnosis device for a crusher, a crushing system, and a deterioration diagnosis method.

Conventionally, a crusher that crushes solid fuel such as coal supplied to a rotary table with a roller, classifies the crushed solid fuel into pulverized fuel smaller than a predetermined particle size, and supplies the pulverized pulverized fuel to a burner. A crushing system) is known (eg, Patent Document 1).

In the crushing section of the crusher, the solid fuel is sandwiched between the rotary table and the roller, and pressure is applied to crush the solid fuel. Therefore, the crushed portion in the crusher is liable to deteriorate (wear, etc.).

Conventionally, in order to predict the replacement time of the rotary table and the roller, the crusher is stopped and the worker directly measures the wear amount of the rotary table and the roller.

Japanese Unexamined Patent Publication No. 2013-178073

In the conventional method, the crusher must be stopped in order to acquire the amount of wear of the crushing part (rotary table and roller), and there are problems such as deterioration of continuous operability of the crusher and burden on the operator. rice field.

The present invention has been made in view of such circumstances, and is a crusher deterioration diagnosis device, a crushing system, and a deterioration capable of performing a crusher deterioration diagnosis with high accuracy without stopping the crusher. The purpose is to provide a diagnostic method.

The first aspect of the present invention is a deterioration diagnosis device applied to a crusher for crushing a solid substance, the acquisition unit for acquiring information related to the current operating state of the crusher, and the initial operation of the crusher. Using the performance estimation model created based on the information related to the state and the information acquired by the acquisition unit, the calculation unit that calculates the performance value of the crusher when no deterioration has occurred, the performance value, and the performance value. It is a deterioration diagnosis device applied to a crusher including an estimation unit for estimating the degree of deterioration of the crushed portion in the crusher based on the information acquired by the acquisition unit.

According to the above configuration, the predetermined performance value of the crusher when the crusher is not deteriorated by using the performance estimation model created based on the initial operation state of the crusher (the state where the crusher is not deteriorated). Is calculated, and the deterioration diagnosis of the crushed portion in the crusher is performed based on the performance value and the information related to the current operating state of the crusher. Therefore, it is possible to estimate the degree of deterioration of the crushed portion in the crusher such as wear of the rollers and the rotary table of the crusher without stopping the crusher for internal inspection or the like. Further, it is possible to eliminate the labor cost required for inspection and the alternative solid substance used during the shutdown period of the crusher, and it is possible to improve the continuous operation rate of the crusher. In addition, since the performance estimation model created based on the initial operation state of the crusher is used, the individual equipment characteristics of the crusher are reflected in the performance estimation model, and the degree of deterioration of the crushed part is estimated more accurately. be able to.

In the deterioration diagnosis device, the information relating to the current operating state of the crusher may include an index indicating the difficulty of crushing the solid substance.

According to the above configuration, a performance estimation model using an index indicating the difficulty of crushing a solid substance (for example, Hardgrove Grindability Index (HGI)) determines a crusher when no deterioration has occurred. It was decided to calculate the performance value of. The predetermined performance value of the crusher is, for example, the driving power of the rotary table, which varies depending on the difficulty of crushing the solid substance. Therefore, by using an index indicating the difficulty of crushing a solid substance, it is possible to more accurately calculate a predetermined performance value of the crusher. Furthermore, since the performance value can be calculated with high accuracy, the degree of deterioration of the crusher can be estimated more accurately.

In the deterioration diagnosis device, the performance value may be at least one of the driving power of the crushing unit and a predetermined differential pressure in the crushing machine.

According to the above configuration, the degree of deterioration of the crushed portion in the crusher can be effectively evaluated. If the rollers or rotary table, which are the crushing parts of the crusher, deteriorate (wear), the crushing performance of solid substances deteriorates. When the crushing performance of the crusher deteriorates, the relative amount of the non-crushed substance in the crusher increases, and the driving power of the crushing portion increases. Further, when the crushing performance of the crusher deteriorates, a predetermined differential pressure in the crusher increases. That is, since each parameter reflects the deterioration of the crushing performance of the crusher (deterioration of the crusher), the degree of deterioration of the crushed portion in the crusher is effectively evaluated by using it as a performance value. be able to.

In the deterioration diagnosis device, the estimation unit calculates a predetermined deterioration index based on the performance value and the information acquired by the acquisition unit, and sets the deterioration index preset and the wear amount ratio in the crushed unit. The amount of wear in the crushed portion may be estimated based on the correlation between the above and the deterioration index.

According to the above configuration, the wear amount can be easily estimated by using the correlation between the deterioration index and the wear amount ratio of the crushed portion.

The deterioration diagnosis device may include a correction unit that corrects the correlation based on the deterioration index and the measured value of the wear amount.

According to the above configuration, since the correlation is corrected based on the measured value of the wear amount, the correlation can be fitted to the actual operation of the crusher, and the wear amount of the crushed portion can be estimated with higher accuracy. It becomes possible to do.

A second aspect of the present invention is a crushing system including a crusher and a deterioration diagnosis device applied to the above-mentioned crusher.

A third aspect of the present invention is a deterioration diagnosis method applied to a crusher for crushing a solid substance, which is an acquisition step for acquiring information related to the current operating state of the crusher and an initial operation of the crusher. Using the performance estimation model created based on the information related to the state and the information acquired in the acquisition process, the calculation process for calculating the performance value of the crusher when no deterioration has occurred, the performance value, and the performance value. It is a deterioration diagnosis method applied to a crusher including an estimation step of estimating the degree of deterioration of a crushed portion in the crusher based on the information acquired in the acquisition step.

According to the present invention, there is an effect that deterioration diagnosis of the crusher can be performed with high accuracy without stopping the crusher.

It is a figure which shows the schematic structure of the crushing system provided with the deterioration diagnosis apparatus which concerns on 1st Embodiment. It is sectional drawing which shows the structure of the roller of the crusher which concerns on 1st Embodiment. It is a functional block diagram which showed the function which the deterioration diagnosis apparatus which concerns on 1st Embodiment has. It is a conceptual diagram of the process in the arithmetic unit which concerns on 1st Embodiment. It is a figure which showed the flowchart of the process performed by the deterioration diagnosis apparatus which concerns on 1st Embodiment. It is a figure which exemplifies the relationship between the deterioration index and the operation time in the deterioration diagnosis apparatus which concerns on 1st Embodiment. It is a figure which exemplifies the correlation between the deterioration index and the wear amount ratio in the deterioration diagnosis apparatus which concerns on 2nd Embodiment. It is a figure which exemplifies the relationship between the wear amount ratio and the operation time in the deterioration diagnosis apparatus which concerns on 2nd Embodiment. It is a figure which showed the flowchart of the process performed by the deterioration diagnosis apparatus which concerns on 2nd Embodiment. It is a functional block diagram which showed the function which the deterioration diagnosis apparatus which concerns on 3rd Embodiment has. It is a figure which exemplifies the correlation between the deterioration index and the wear amount ratio in the deterioration diagnosis apparatus which concerns on 3rd Embodiment. It is a figure which showed the flowchart of the process performed by the deterioration diagnosis apparatus which concerns on 3rd Embodiment.

Hereinafter, the first embodiment of the deterioration diagnosis device will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a crushing system 1 provided with a deterioration diagnosis device 3 according to the first embodiment. In FIG. 1, a cross-sectional view of the crusher 2 is shown.

In this embodiment, a case where the deterioration diagnosis device 3 is applied to the crusher 2 that crushes the solid fuel (solid substance) in a power plant or the like (crushing system 1) will be described, but the solid substance is crushed. Any crusher (for example, a crusher that crushes a cement raw material in a cement production plan) can be applied not only to a power generation plant. Further, in the present embodiment, the case where the crushing portion of the crusher 2 is composed of the rotary table 6 and the roller 7 will be described, but the crusher 2 may have another configuration such as a hammer type. be.

As shown in FIG. 1, the crushing system 1 according to the present embodiment includes a crushing machine 2 and a deterioration diagnosis device 3. Further, the crusher 2 includes a housing 5, a rotary table 6, a roller 7, a classification unit 8, and a blower unit 9 as main configurations.

The housing 5 is a hollow member having a substantially cylindrical shape, and is a housing of the crusher 2.

The rotary table 6 is arranged at the lower part in the housing 5 and is rotatably attached around an axis extending in the vertical direction. Further, the rotary table 6 is driven by a drive unit 10 provided at the lower part. The drive unit 10 is supplied with electric power from the power supply device 16. The drive unit 10 includes an electric motor, a speed reducer, and the like, and is connected to the central portion of the rotary table 6 via a rotary shaft 11. Further, solid fuel (solid substance to be crushed) is supplied to the central portion of the rotary table 6 via a fuel input portion 14 attached so as to penetrate the upper end of the housing 5. The solid fuel supplied to the central portion moves from the central portion to the outer peripheral portion by the centrifugal force of the rotating rotary table 6, and is sandwiched between the rotary table 6 and the rollers 7 provided on the outer peripheral portion of the rotary table 6. And crushed.

The roller 7 is pressed against the outer peripheral portion of the rotary table 6 and cooperates with the rotary table 6 to crush the solid fuel. That is, the roller 7 sandwiches the solid fuel guided by the rotation of the rotary table 6 with the rotary table 6 and crushes the solid fuel into fine powder fuel. An example of the detailed configuration of the roller 7 is shown in FIG. The roller 7 is supported by the housing 5 by the roller support portion 20. The roller support portion 20 extends upward to the support shaft 21 to which the roller 7 is attached, the main body 22 for holding the support shaft 21, the rotary shaft 23 fixedly attached to the side portion of the main body 22, and the upper surface of the main body 22. It includes an arm 24 attached so as to exist, and a protrusion 25 provided on the lower surface of the main body 22 so as to project downward.

A hollow hub 26 having a substantially cylindrical shape is attached to the center of the roller 7. The roller 7 is attached to the tip end portion of the support shaft 21 via the hub 26. Therefore, the roller 7 can rotate around the support shaft 21 in the circumferential direction. The rotary shaft 23 is arranged so that the axis is substantially horizontal and extends in the tangential direction of the circular shape of the rotary table 6. The roller support portion 20 is rotatable about the rotary shaft 23, and by rotating around the rotary shaft 23, the distance of the roller 7 to the outer peripheral portion of the rotary table 6 changes.

A load applying portion 27 that presses the upper end portion of the arm 24 is attached to the housing 5. The load applying portion 27 includes an intermediate piston 28 attached to the housing 5 so as to be movable in the longitudinal direction, and a hydraulic load portion 29 attached to the outer periphery of the housing 5 and pressing the outer end portion of the intermediate piston 28. The inner end of the intermediate piston 28 is connected to the outer peripheral side of the upper end of the arm 24. The load applying portion 27 causes the roller support portion 20 to swing around the rotation shaft 23 by moving the intermediate piston 28 in the longitudinal direction by the hydraulic load portion 29. That is, the roller 7 is pressed against the rotary table 6 by the load applying portion 27.

The protrusion 25 abuts on the stopper 30 when the roller support 20 swings to a certain position about the rotation shaft 23. The stopper 30 functions as a limiting member that limits the amount of movement of the roller 7 in the direction of pressing the rotary table 6.

Although only one roller 7 is shown in FIG. 1, a plurality of rollers 7 are arranged at regular intervals in the outer peripheral direction so as to press the outer peripheral portion of the rotary table 6. For example, three rollers 7 are arranged on the outer peripheral portion at an angular interval of 120 °. In this case, the portion where the three rollers 7 are in contact with the outer peripheral portion of the rotary table 6 (the portion to be pressed) is equidistant from the central portion of the rotary table 6.

Further, in the present embodiment, the rotary table 6 is electrically driven by the drive unit 10, but the roller 7 may be electrically driven instead of the rotary table 6, and both the rotary table 6 and the roller 7 may be electrically driven. It may be configured to be used.

The classification unit 8 is arranged at the upper part in the housing 5. Specifically, the classification unit 8 includes a blade that rotates about a cylindrical axis of a substantially cylindrical housing 5. The crushed solid fuel that has reached the classification unit 8 has a predetermined grain size due to the relative balance between the centrifugal force and the centripetal force generated by the rotating blade and the flow of the primary air (primary oxidizing gas) supplied by the blower unit 9. Only fine fuel having a smaller diameter flows into the inside of the blade and flows out from the outlet 15. The outlet 15 is connected to a boiler (not shown) via a supply flow path. In the boiler, the burner burns the pulverized fuel and transfers the generated heat to the steam flowing through the steam pipe to exchange heat. .. The steam that has become hot is used as power to rotate the steam turbine (not shown).

The blower unit 9 supplies primary air (primary oxidizing gas) into the housing 5 (lower part (lower housing) of the rotary table 6) in order to supply the fine powder fuel to the classification unit 8. The air supplied from the blower portion 9 to the lower part of the rotary table 6 may be preheated or the like. At a plurality of locations outside the rotary table 6, outlets 12 are provided to allow the primary air flowing from the flow path to flow out to the space (upper housing) above the rotary table 6 in the housing 5. A vane 13 is installed above the air outlet 12, and the vane 13 gives a swirling force to the primary air blown out from the air outlet 12. The primary air to which the swirling force is applied by the vane 13 becomes an air flow as shown by an arrow in FIG. 1, and the solid fuel (fine powder fuel) crushed on the rotary table 6 is sent to the classification portion 8 above the housing 5. Guide. Of the crushed solid fuels in the air flow of the primary air, those having a large particle size fall without reaching the classification unit 8 and are returned to the rotary table 6 again.

The deterioration diagnosis device 3 performs deterioration diagnosis of the crushed portion in the crusher 2 based on the operating state of the crusher 2 (for example, the measurement result by the measuring instrument). Specifically, the degree of wear of the rotary table 6 and the roller 7 provided in the crusher 2 is evaluated.

Therefore, the crusher 2 as shown in FIG. 1 is provided with a measuring instrument for measuring the operating state of the crusher 2. For example, a measuring instrument for measuring the amount of solid fuel (coal supply amount) supplied to the crusher 2, a measuring instrument for measuring the flow rate (primary air amount) of the primary air supplied from the blower unit 9, and a classification unit 8. A measuring instrument that measures the blade rotation speed (classification unit rotation speed), a measuring instrument that measures the crushing load in the roller 7, a measuring instrument that measures the temperature of the primary air supplied from the blower unit 9 (inlet air temperature), and crushing. Pressure in the lower space (lower housing) of the rotary table 6 in the crusher 2 which is a measuring instrument for measuring the temperature (outlet air temperature) of the pulverized fuel mixed air near the outlet of the machine 2 (pressure of the air supplied from the blower portion 9). ) And the pressure (pressure of the air supplied to the classification unit 8) in the upper space (upper housing) of the rotary table 6 is measured by a measuring instrument or the like for measuring the differential pressure (the differential pressure of the crusher). The crushing load is, for example, the internal hydraulic pressure of the hydraulic load unit 29 in FIG. These measuring instruments are arranged so that the parameters required when calculating the drive power of the rotary table 6 using the performance estimation model described later can be measured. Since the measurement target of the measuring instrument depends on the configuration of the performance estimation model, it is not limited to the above and can be changed as appropriate.
Further, the crusher 2 is provided with a measuring instrument for measuring the driving power of the crushing unit (rotary table 6). The drive power of the rotary table 6 is the power supplied from the power supply device 16 to the drive unit 10 for rotationally driving the rotary table 6. When the roller 7 is also driven by electric power in the crushing section, the driving force of the rotary table 6 and the roller 7 may be acquired as the driving force of the crushing section. Various results measured by these measuring instruments are output to the deterioration diagnosis device 3.

The deterioration diagnosis device 3 includes, for example, a CPU (central processing unit) (not shown), a memory such as a RAM (Random Access Memory), a computer-readable recording medium, and the like. A series of processing processes for realizing various functions described later is recorded in a recording medium or the like in the form of a program, and the CPU reads this program into RAM or the like to execute information processing / arithmetic processing. As a result, various functions described later are realized.

FIG. 3 is a functional block diagram showing the functions of the deterioration diagnosis device 3. As shown in FIG. 3, the deterioration diagnosis device 3 includes an acquisition unit 31, a storage unit 32, a calculation unit 33, and an estimation unit 34.

The acquisition unit 31 acquires information relating to the current operating state of the crusher 2. Specifically, the acquisition unit 31 acquires the measurement results of various measuring instruments provided in the crusher 2 as information relating to the current operating state of the crusher 2. In the present embodiment, as the measurement results of various measuring instruments, the amount of coal supply, the amount of primary air, the number of rotations of the classification unit, the crushing load, the inlet air temperature, the outlet air temperature, and the differential pressure of the crusher are acquired. Further, the acquisition unit 31 acquires an index indicating the difficulty of crushing the solid fuel (solid substance). The index indicating the difficulty of crushing the solid fuel is, for example, the Hardgrove Grindability Index (HGI). The HGI is input to the control panel or the like by the operator of the power plant (crusher 2), for example, and the acquisition unit 31 acquires the HGI from the control panel. If the HGI can be measured (or estimated) by the measuring instrument in the crusher 2, the acquisition unit 31 may acquire the HGI from the measuring instrument. Further, as long as it is an index showing the difficulty of crushing solid fuel, it can be used not only as a hard glove crushability index.

The above parameter values (coal supply amount, primary air amount, classifying unit rotation speed, crushing load, inlet air temperature, outlet air temperature, crusher differential pressure, HGI) acquired by the acquisition unit 31 are based on the performance estimation model described later. It is used to calculate the performance value of the crusher 2 (for example, the driving power of the rotary table 6). The parameters acquired by the acquisition unit 31 depend on the structure of the performance estimation model and can be used without being limited to the above parameters. Each value acquired by the acquisition unit 31 is output to the calculation unit 33.

Further, the acquisition unit 31 acquires the measured values related to the parameters (of the same type) corresponding to the performance values (for example, the driving power of the rotary table 6) calculated by using the performance estimation model described later. In the present embodiment, since the drive power (performance value) of the rotary table 6 of the crusher 2 in the initial state is calculated using the performance estimation model, the acquisition unit 31 is the rotary table 6 in the current operating state. Acquire the drive power (parameter corresponding to the performance value) from the measuring instrument. As the performance value calculated using the performance estimation model, parameters other than the drive power of the rotary table 6 can be used as described later. In this case, the acquisition unit 31 is the performance estimation model. It is assumed that the measured values related to the parameters (of the same type) corresponding to the performance values calculated using the above are acquired.

The storage unit 32 stores a performance estimation model created based on the information related to the initial operation state of the crusher 2. The information related to the initial operation state of the crusher 2 is, for example, operation data obtained in an operation test (performance test) performed after the completion of the crusher 2. In the operation test, when each parameter (for example, coal supply amount, primary air amount, classifying part rotation speed, crushing load, inlet air temperature, outlet air temperature, crusher differential pressure, HGI) is changed within a predetermined range. The fluctuation of the drive power of the rotary table 6 is recorded. Then, the performance estimation model is created by applying a multiple regression analysis method, an AI machine learning method, or the like using the information related to the initial operation state obtained in the operation test. The performance estimation model can also be a table or the like in which fluctuations in each parameter and fluctuations in the drive power of the rotary table 6 are associated with each other. That is, in the performance estimation model, as shown in FIG. 4, by inputting a predetermined parameter, the drive power (performance value) of the rotary table 6 of the crusher 2 in the state at the time of completion (no deterioration) can be obtained. It is data that can be calculated.

Since the performance estimation model is created based on the information related to the initial operation state of the crusher 2, the characteristics of the individual equipment of the crusher 2 are reflected. The crusher 2 has individual equipment characteristics due to problems such as processing (crushing) accuracy, installation, and arrangement of each member. Therefore, by creating a performance estimation model based on the information related to the initial operation state of the crusher 2, it is possible to calculate a more accurate performance value (driving power of the rotary table 6).

The calculation unit 33 calculates the performance value (initial state performance value) of the crusher 2 when no deterioration has occurred, using the performance estimation model stored in the storage unit 32 and the information acquired by the acquisition unit 31. The performance value of the crusher 2 is at least one of the driving power of the crushing unit and a predetermined differential pressure in the crusher 2. In the present embodiment, the case where the driving power of the crushing unit (rotary table 6) is used as the performance value of the crusher 2 will be described, but the same applies even when other performance values are used (for example, crushing as the performance value). When a predetermined differential pressure in the machine 2 is used, a predetermined differential pressure in the crusher 2 is calculated when no deterioration occurs from the performance estimation model).

The calculation unit 33 reads out the performance estimation model stored in the storage unit 32, and the information acquired by the acquisition unit 31 (coal supply amount, primary air amount, classification unit rotation speed, crushing load, inlet air temperature, outlet air). Read temperature, crusher differential pressure, HGI). Then, as shown in FIG. 4, the information acquired by the acquisition unit 31 (coal supply amount, primary air amount, classifying unit rotation speed, crushing load, inlet air temperature, outlet air temperature, crusher differential pressure, HGI) is obtained. The performance value (driving power of the rotary table 6) is calculated by inputting to the performance estimation model. The calculated performance value is output to the estimation unit 34.

In the present embodiment, the performance estimation model is stored in the storage unit 32 and read out by the calculation unit 33, but the network is connected from a server or the like in which the performance estimation model created as described above is remotely arranged. If it can be acquired via the device, the deterioration diagnosis device 3 may be configured not to include the storage unit 32 but to include a communication unit or the like that communicates with the server or the like.

The estimation unit 34 estimates the degree of deterioration of the crushing unit in the crusher 2 based on the performance value calculated by the calculation unit 33 and the information acquired by the acquisition unit 31. Specifically, the estimation unit 34 uses the following relational expression as a deterioration index based on the calculated drive power of the rotary table 6 (estimated value of the drive power) and the measured value of the drive power of the rotary table 6. , Calculate the power increase rate.

[Number 1]
Power increase = (measured value of drive power-estimated value of drive power) / measured value of drive power (1)

When the crushing portion (rotary table 6 and roller 7) is worn, the friction between the rotary table 6 and the roller 7 increases, so that the electric power supplied from the power supply device 16 increases in order to maintain the rotation speed of the rotary table 6. That is, the driving power of the rotary table 6 increases as the crushed portion deteriorates. In the equation (1), the estimated value of the driving power is the driving power of the rotary table 6 in the crusher 2 in the initial state (no deterioration) calculated from the performance estimation model, and the measured value of the driving power is the present. It is the driving power of the rotary table 6 in the crusher 2 in the operating state (with deterioration) of. Therefore, in the equation (1), the increase rate of the drive power of the rotary table 6 in the current crusher 2 with respect to the crusher 2 in the initial state can be calculated, and by referring to the power increase rate, the crushing unit can be used. It is possible to estimate how much deterioration has occurred.

Then, the estimation unit 34 determines whether or not the crushing unit (rotary table 6 and roller 7) should be replaced by comparing the power increase rate calculated from the equation (1) with a predetermined threshold value, and replaces the crushed unit 34. If it is in a state where it should be, notify the operator of the power plant. The threshold value is set to a value obtained by adding a predetermined margin to the value of the power increase rate corresponding to the maximum allowable wear amount (limit value) of the crushing portion (rotary table 6 and roller 7).

The estimation unit 34 calculates the integrated operation time of the crusher 2 from the calculated power increase rate based on the relationship between the deterioration index (power increase rate) and the operation time as shown in FIG. 6, and then crushes. The operating time (life) up to the recommended replacement time of the machine 2 may be calculated and notified to the operator of the power plant or the like.

Next, the process performed by the deterioration diagnosis device 3 described above will be described with reference to FIG. The flow shown in FIG. 5 is repeatedly executed at a predetermined control cycle when the crusher 2 is operating.

First, as information on the current operating state of the crusher 2, the measurement results of various measuring instruments provided in the crusher 2 (fuel supply amount, primary air amount, classifying unit rotation speed, crushing load, inlet air temperature, outlet). Air temperature, crusher differential pressure, HGI) and an index (HGI) indicating the difficulty of crushing solid fuel are acquired (S101).

Next, based on the acquired information on the current operating state of the crusher 2 and the performance estimation model, the performance value of the crusher 2 (driving power of the rotary table 6) in the state without deterioration is calculated (S102). ..

Next, the deterioration index (power increase rate) is calculated based on the calculated drive power (estimated value) of the rotary table 6 and the measured drive power (measured value) of the rotary table 6 (S103).

Next, it is determined whether or not the calculated power increase rate is equal to or higher than a predetermined threshold value (S104). Then, when the calculated power increase rate is not equal to or higher than a predetermined threshold value (NO determination in S104), the process ends.

Further, when the calculated power increase rate is equal to or higher than a predetermined threshold value (YES determination in S104), the operation of the power plant indicates that the wear amount of the crushed portion is approaching the maximum allowable wear amount (limit value). Notify the member (S105).

Next, a modification of the deterioration diagnosis device 3 according to the first embodiment of the present invention will be described. In the above embodiment, the performance value of the crusher 2 calculated by the calculation unit 33 using the performance estimation model is used as the drive power of the crushing unit (rotary table 6), but in this modification, the performance value is crushing. A predetermined differential pressure in the machine 2 is used.

The predetermined differential pressure in the crusher 2 is the pressure in the lower space (lower housing) of the rotary table 6 in the crusher 2 (pressure of air supplied from the blower portion 9) and the upper space of the rotary table 6 (upper housing). ) Is the differential pressure (differential pressure of the crusher) of the pressure (pressure of the air supplied to the classification unit 8). When the crushing performance of the crusher 2 deteriorates, the relative amount of the non-crushed substance in the crusher 2 increases, and the pressure in the lower space of the rotary table 6 in the crusher 2 and the pressure of the air supplied to the classification unit 8 become (Differential pressure of crusher) increases. That is, when the crushing portion deteriorates and the crushing performance of the crusher 2 deteriorates, the differential pressure of the crusher increases.

The acquisition unit 31 has the same as in the above embodiment, the amount of coal supply, the amount of primary air, the number of rotations of the classification unit, the crushing load, the inlet air temperature, the outlet air temperature, the crusher differential pressure, the HGI, and the driving power of the crushing unit. To get.

The storage unit 32 in this modification stores a performance estimation model in which the amount of coal supply, the amount of primary air, the number of rotations of the classification unit, the crushing load, the inlet air temperature, the outlet air temperature, the HGI, and the drive power of the crushing unit can be input. ing. That is, the performance estimation model in this modification is in the initial state by inputting the amount of coal supply, the amount of primary air, the rotation speed of the classification unit, the crushing load, the inlet air temperature, the outlet air temperature, the HGI, and the driving power of the crushing unit. This is a model in which the differential pressure of the crusher in the crusher 2 (without deterioration) can be calculated. Therefore, the calculation unit 33 calculates the crusher differential pressure in the crusher 2 in the initial state (no deterioration) based on the performance estimation model stored in the storage unit 32 and the information acquired by the acquisition unit 31. , Output to the estimation unit 34.

The estimation unit 34 is based on the crusher differential pressure (estimated value of the crusher differential pressure) calculated by the calculation unit 33 and the crusher differential pressure (measured value of the crusher differential pressure) acquired by the acquisition unit 31. The degree of deterioration of the crushed portion in the crusher 2 is estimated. For example, the estimation unit 34 calculates the differential pressure increase rate as a deterioration index from the following relational expression.

[Number 2]
Differential pressure increase rate = (Measured value of crusher differential pressure-Estimated value of crusher differential pressure) / Measured value of crusher differential pressure
(2)

Then, the estimation unit 34 determines whether or not the crushing unit (rotary table 6 and roller 7) should be replaced by comparing the differential pressure increase rate calculated from the equation (2) with a predetermined threshold value. If it is in a state to be replaced, notify the operator of the power plant. The threshold value is set to a value obtained by adding a predetermined margin to the value of the differential pressure increase rate corresponding to the maximum allowable wear amount (limit value) of the crushed portion (rotary table 6 and roller 7).

The performance value of the crusher 2 is a parameter that reflects the degree of deterioration (wear) in the crushed portion. Therefore, it is possible to use other than the driving power of the crushing unit and the predetermined differential pressure in the crushing machine 2.

As described above, according to the deterioration diagnosis device 3, the crushing system 1, and the deterioration diagnosis method of the crusher 2 according to the present embodiment, the crusher 2 is based on the initial operation state (state in which deterioration has not occurred). Using the created performance estimation model, a predetermined performance value of the crusher 2 (for example, the driving power of the rotary table 6) when no deterioration has occurred is calculated, and the performance value and the current performance value of the crusher 2 are calculated. Deterioration diagnosis of the crushed portion in the crusher 2 is performed based on the information related to the operating state (for example, the measured value of the driving power of the rotary table 6). Therefore, it is possible to estimate the degree of deterioration of the crushed portion in the crusher 2 such as wear of the roller 7 of the crusher 2 and the rotary table 6 without stopping the crusher 2 for internal inspection or the like. Further, the labor cost required for the inspection and the alternative solid substance used during the shutdown period of the crusher 2 can be eliminated, and the continuous operation rate of the crusher 2 can be improved.

Further, since the performance estimation model created based on the initial operation state of the crusher 2 is used, the individual equipment characteristics of the crusher 2 are reflected in the performance estimation model, and the degree of deterioration of the crushed portion can be more accurately determined. Can be estimated.

Further, using an index indicating the difficulty of crushing a solid substance (for example, the Hardgrove Grindability Index (HGI)), a predetermined performance value of the crusher 2 when no deterioration has occurred is calculated by a performance estimation model. I decided. The predetermined performance value of the crusher 2 is, for example, the driving power of the rotary table 6, which varies depending on the difficulty of crushing the solid substance. Therefore, by using an index indicating the difficulty of crushing a solid substance, it is possible to more accurately calculate a predetermined performance value of the crusher 2. Further, it becomes possible to more accurately estimate the degree of deterioration of the crusher 2.

Further, the degree of deterioration of the crushed portion in the crusher 2 can be effectively evaluated. When the roller 7 or the rotary table 6 which is the crushing portion in the crusher 2 deteriorates (wears), the crushing performance of the solid substance deteriorates. When the crushing performance of the crusher 2 deteriorates, the relative amount of the non-crushed substance in the crusher 2 increases, and the driving power of the crushing unit increases. Further, when the crushing performance of the crusher 2 deteriorates, a predetermined differential pressure in the crusher 2 increases. That is, since each parameter reflects that the crushing performance of the crusher 2 has deteriorated (deterioration of the crusher 2), the degree of deterioration of the crushed portion in the crusher 2 is effective by using it as a performance value. Can be evaluated.

Next, the deterioration diagnosis device 3, the crushing system 1, and the deterioration diagnosis method according to the second embodiment of the present invention will be described.
In the first embodiment described above, the deterioration diagnosis of the crusher 2 is performed based on the deterioration index (power increase rate) calculated by the estimation unit 34, but in the present embodiment, the deterioration index calculated by the estimation unit 34 (power increase rate). The amount of wear of the crushed portion is estimated from the power increase rate), and the deterioration diagnosis of the crusher 2 is performed based on the estimated amount of wear. Hereinafter, the deterioration diagnosis device 3 according to the present embodiment will be mainly described with respect to the differences from the first embodiment.

The storage unit 32 in the present embodiment has a correlation between a predetermined deterioration index and a wear amount ratio in the crushing unit (rotary table 6 and roller 7). Specifically, the storage unit 32 has a correlation between the deterioration index (power increase rate) and the wear amount ratio as shown in FIG. 7. Note that FIG. 7 shows the relationship of the wear amount ratio in the roller 7, and the relationship of the wear amount ratio in the rotary table 6 is also stored in the storage unit 32 in the same manner. The correlation as shown in FIG. 7 is created from the past operation data obtained from the crusher 2 of the same type as the crusher 2 to be applied. The wear amount ratio is the ratio of the maximum wear amount of the roller 7 to the radius of the roller 7 at the time of completion (initial) (radius of the initial roller 7-radius of the roller 7 at the maximum wear point). The wear amount ratio in the rotary table 6 is the ratio of the maximum wear amount of the rotary table 6 (initial rotary table 6 thickness-rotary table 6 thickness at the maximum wear location) to the rotary table 6 thickness at the time of completion (initial). ..

Then, the estimation unit 34 in the present embodiment calculates the deterioration index (power change rate), and then uses the correlation stored in the storage unit 32 to present (when the information is acquired by the acquisition unit 31). The wear amount ratio of the rotary table 6 and the roller 7 is obtained, and the actual wear amount is estimated. Then, by comparing the estimated wear amount with the preset threshold value, it is determined whether or not the crushed portion (rotary table 6 and roller 7) should be replaced, and if it is in the state to be replaced, the crushed portion (rotary table 6 and roller 7) should be replaced. Notify the operators of the power plant. The threshold value is set to a value obtained by adding a predetermined margin to the maximum allowable wear amount (limit value) of the crushed portion (rotary table 6 and roller 7).

The estimation unit 34 calculates the integrated operating time of the crusher 2 from the obtained wear ratio based on the relationship between the wear ratio and the operating time as shown in FIG. 8, and evaluates the crusher 2. The operating time (life) up to the recommended replacement time may be calculated and notified to the operator of the power plant.

Next, the process performed by the deterioration diagnosis device 3 according to the present embodiment will be described with reference to FIG. The flow shown in FIG. 9 is repeatedly executed at a predetermined control cycle when the crusher 2 is operating. The process up to the calculation of the deterioration index (S103) is the same as that of the first embodiment.

After calculating the deterioration index (S103), the amount of wear of the crushed portion (rotary table 6 and roller 7) is estimated based on the calculated deterioration index (S204).

Next, it is determined whether or not the estimated amount of wear is equal to or greater than a predetermined threshold value (S205). Then, when the estimated wear amount is not equal to or more than a predetermined threshold value (NO determination in S205), the process is terminated.

Further, when the estimated wear amount is equal to or higher than the predetermined threshold value (YES judgment in S205), the operator of the power plant indicates that the wear amount of the crushed portion is approaching the maximum allowable wear amount (limit value). (S206).

As described above, according to the deterioration diagnosis device 3, the crushing system 1, and the deterioration diagnosis method according to the present embodiment, the wear amount can be easily determined by using the correlation between the deterioration index and the wear amount ratio of the crushed portion. Can be estimated.

Next, the deterioration diagnosis device 3, the crushing system 1, and the deterioration diagnosis method according to the third embodiment of the present invention will be described.
In the second embodiment described above, the storage unit 32 has a correlation between the predetermined deterioration index and the wear amount ratio in the crushed unit, but in the present embodiment, the correlation that the storage unit 32 has is determined. Correct based on the measured value of the wear amount of the crushed part. Hereinafter, the deterioration diagnosis device 3 according to the present embodiment will be mainly described with respect to the differences from the second embodiment (and the first embodiment).

As shown in FIG. 10, the deterioration diagnosis device 3 according to the present embodiment further includes a correction unit 35.
The correction unit 35 corrects the correlation based on the deterioration index estimated by the estimation unit 34 and the measured value of the wear amount. Specifically, the correction unit 35 acquires the wear amount of the crushed portion actually measured by the operator or the like when the wear amount estimated by the estimation unit 34 is equal to or higher than a predetermined threshold value, and actually measures the wear. When the amount is not equal to or more than a predetermined threshold value, the correlation stored in the storage unit 32 is corrected. The correction unit 35 corrects the correlation so that the value of the deterioration index (power change rate) calculated by the estimation unit 34 is the amount of wear of the crushed portion actually measured.

For example, when the correlation is L1 in FIG. 11, if the deterioration index calculated by the estimation unit 34 is A, the estimation unit 34 estimates the wear amount corresponding to the wear amount ratio B. Then, it is assumed that the estimated amount of wear is equal to or greater than the threshold value. In this case, the correction unit 35 acquires the amount of wear of the crushed unit actually measured by the operator or the like. Then, when the measured wear amount is not equal to or more than a predetermined threshold value (when a large amount of wear is estimated by the estimation unit 34), the deterioration index is estimated to be the wear amount ratio C corresponding to the wear amount actually measured in A. The correlation is corrected from L1 to L2 so as to be. The correction unit 35 in the present embodiment corrects the correlation when the amount of wear estimated by the estimation unit 34 is large. Therefore, when the correlation is corrected, the wear amount ratio with respect to a certain deterioration index. May be corrected so that is less than a predetermined amount.

Next, the process performed by the deterioration diagnosis device 3 according to the present embodiment will be described with reference to FIG. The flow shown in FIG. 12 is repeatedly executed at a predetermined control cycle when the crusher 2 is operating. The process up to the calculation of the deterioration index (S205) is the same as that of the second embodiment.

If the estimated amount of wear is not equal to or greater than a predetermined threshold value (NO determination in S205), the process ends.

When the estimated wear amount is equal to or higher than the predetermined threshold value (YES determination in S205), it is necessary to measure the wear amount of the crushed portion (rotary table 6 and roller 7) for the operator of the power plant. Notify that (S306).

Next, the measurement result (actual measurement value) of the wear amount of the crushed portion is input to the deterioration diagnosis device 3 by the operator or the like, and the actual measurement value of the wear amount is acquired (S307). Then, it is determined whether or not the measured value of the amount of wear is equal to or higher than a predetermined threshold value (S308). When the measured value of the wear amount is equal to or higher than the predetermined threshold value (YES determination in S308), the operation of the power plant indicates that the wear amount of the crushed portion is approaching the maximum allowable wear amount (limit value). Notify the member (S309).

If the measured value of the wear amount is not equal to or higher than the predetermined threshold value (NO determination in S308), the existing correlation may estimate the wear amount more than the actual value, so the correlation is corrected. (S310).

As described above, according to the deterioration diagnosis device 3, the crushing system 1, and the deterioration diagnosis method according to the present embodiment, the correlation is set by the crusher 2 in order to correct the correlation based on the measured value of the wear amount. It can be fitted to actual operation, and the amount of wear of the crushed portion can be estimated with higher accuracy.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the invention. It is also possible to combine each embodiment.

1: Crushing system 2: Crushing machine 3: Deterioration diagnosis device 5: Housing 6: Rotating table 7: Roller 8: Classification section 9: Blower section 10: Drive section 11: Rotating shaft 12: Outlet 13: Vane 16: Power supply device 20: Roller support 21: Support shaft 22: Main body 23: Rotating shaft 24: Arm 25: Projection 26: Hub 27: Load application part 28: Intermediate piston 29: Hydraulic load part 30: Stopper 31: Acquisition part 32: Storage Unit 33: Calculation unit 34: Estimating unit 35: Correction unit

Claims (7)

A deterioration diagnostic device suitable for crushers that crush solid substances.
An acquisition unit that acquires information related to the current operating state of the crusher, and
Using the performance estimation model created based on the information related to the initial operation state of the crusher and the information acquired by the acquisition unit, a calculation unit that calculates the performance value of the crusher when no deterioration has occurred. ,
An estimation unit that estimates the degree of deterioration of the crushing unit in the crusher based on the performance value and the information acquired by the acquisition unit, and an estimation unit.
Deterioration diagnostic equipment applied to crushers equipped with. The deterioration diagnosis device applied to the crusher according to claim 1, wherein the information relating to the current operating state of the crusher includes an index indicating the difficulty of crushing the solid substance. The deterioration diagnosis device applied to the crusher according to claim 1 or 2, wherein the performance value is at least one of the driving power of the crushing unit and a predetermined differential pressure in the crushing machine. The estimation unit calculates a deterioration index based on the performance value and the information acquired by the acquisition unit, and calculates the correlation between the preset deterioration index and the wear amount ratio in the crushed unit. The deterioration diagnostic apparatus applied to the crusher according to any one of claims 1 to 3, which estimates the amount of wear in the crushed portion based on the deterioration index. The deterioration diagnostic apparatus applied to the crusher according to claim 4, further comprising a correction unit for correcting the correlation based on the deterioration index and the measured value of the wear amount. With a crusher,
The deterioration diagnostic apparatus applied to the crusher according to any one of claims 1 to 5.
A crushing system equipped with. It is a deterioration diagnosis method applied to a crusher that crushes solid substances.
The acquisition process for acquiring information related to the current operating state of the crusher, and
Using the performance estimation model created based on the information related to the initial operation state of the crusher and the information acquired in the acquisition process, a calculation process for calculating the performance value of the crusher when no deterioration has occurred. ,
An estimation step for estimating the degree of deterioration of the crushed portion in the crusher based on the performance value and the information acquired in the acquisition step, and an estimation step.
Deterioration diagnostic method applied to crushers including.

Images