JP2021107056A - Wear evaluation system and solid fuel crushing machine, and wear evaluation method, and wear evaluation program - Google Patents

Abstract

To provide a wear evaluation system which can perform wear evaluation with higher accuracy and a solid fuel crushing machine, and to provide a wear evaluation method and a wear evaluation program.SOLUTION: A wear evaluation system of a solid fuel crushing machine 100, which crushes a sold fuel in a mill 10, includes: an acquisition part which acquires a measured value related to an operation state in the solid fuel crushing machine 100; a specifying part which specifies wear evaluation information corresponding to the measured value based on corresponding information in which the operation state and the wear evaluation information of the mill 10 are related in each of a plurality of classes set according to a type of the solid fuel; and an evaluation part which performs wear evaluation of the mill 10 based on the specified wear evaluation information.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a wear assessment system, a solid fuel crusher, a wear assessment method, and a wear assessment program.

Conventionally, a solid fuel (carbon-containing solid fuel) such as coal or biomass fuel is crushed into fine powder within a predetermined particle size range by a crusher (mill) and supplied to a combustion device. The mill crushes solid fuel such as coal and biomass fuel charged into the rotary table by chewing between the rotary table and rollers. Then, the fuel that has been crushed into fine powder by the transport gas supplied from the outer circumference of the rotary table is sorted by a classifier within a predetermined particle size range, transported to a boiler, and burned by a combustion device. There is. In a thermal power plant, steam is generated by heat exchange with the combustion gas generated by burning in a boiler, the steam turbine is rotationally driven by the steam, and the generator connected to the steam turbine is rotationally driven to generate electricity. Is done.

Crushing of solid fuel causes wear on rollers and tables. Therefore, it is necessary to perform appropriate maintenance depending on the wear condition. For example, regarding the hardness of coal, Patent Document 1 describes that it is detected that the hardness is reduced due to a decrease in the lift amount of the rollers.

Japanese Unexamined Patent Publication No. 11-10025

For example, when performing wear evaluation to estimate the remaining life until maintenance of the rollers and turntable of the mill, the operating conditions of the mill are set to the design planning conditions (for example, the coal type of coal used during the rated load operation of the power plant). If the evaluation is performed on the assumption that the operating conditions such as the amount of coal supplied and the amount of coal supplied are constant, the effects of changes in the operating conditions and coal types that occur during the actual operation of the power plant will not be fully reflected. Therefore, it is difficult to perform wear evaluation for estimating the remaining life with high accuracy. In addition, in order to directly measure the amount of wear generated by the actual operation of the power plant, it is necessary to stop the operation of the mill by the usual method, and it is not possible to directly measure the amount of wear frequently. There is a limit to the wear evaluation that makes it possible to estimate the remaining life with high accuracy. In addition, when the wear evaluation is predicted and the remaining life is evaluated by reflecting the change of the coal type of the coal actually used, the wear resistance index for the coal type to be used is prepared separately in advance. In the above, since it is necessary to select the corresponding index each time the coal type is changed, if a human error occurs, the wear evaluation prediction may change and the remaining life estimation may be misunderstood. Therefore, in order to estimate the remaining life with high accuracy, it is desired to accurately reflect the operating condition and the properties of coal to perform wear evaluation more accurately.

The present disclosure is made in view of such circumstances, and provides a wear evaluation system and a solid fuel crusher capable of performing wear evaluation more accurately, a wear evaluation method, and a wear evaluation program. With the goal.

The first aspect of the present disclosure is a wear evaluation system for a solid fuel crusher that crushes solid fuel in a crushing unit, the acquisition unit that acquires a measured value regarding an operating state in the solid fuel crushing device, and a type of solid fuel. In each of the plurality of classes set according to the above, the wear resistance evaluation information corresponding to the measured value is specified based on the correspondence information associated with the operation state and the wear resistance evaluation information of the crushed portion. It is a wear evaluation system including a specific unit to be used and an evaluation unit for performing wear evaluation in the crushed unit based on the specified wear property evaluation information.

The second aspect of the present disclosure is a wear evaluation method for a solid fuel crusher that crushes solid fuel in a crushing unit, and includes a step of acquiring a measured value regarding an operating state of the solid fuel crusher and a type of solid fuel. In each of the plurality of classes set accordingly, the wear resistance evaluation information corresponding to the measured value is specified based on the correspondence information associated with the operating state and the wear resistance evaluation information of the crushed portion. It is a wear evaluation method including a step and a step of performing wear evaluation in the pulverized portion based on the specified wear property evaluation information.

A third aspect of the present disclosure is a wear evaluation program for a solid fuel crusher that crushes solid fuel in a crushing unit, and includes a process for acquiring a measured value regarding an operating state of the solid fuel crusher and a type of solid fuel. In each of the plurality of classes set accordingly, the wear resistance evaluation information corresponding to the measured value is specified based on the corresponding information associated with the operating state and the wear resistance evaluation information of the crushed portion. This is a wear evaluation program for causing a computer to perform a process and a process of evaluating wear in the crushed portion based on the specified wear property evaluation information.

According to the present disclosure, there is an effect that wear evaluation can be performed more accurately.

It is a block diagram which shows the solid fuel crushing apparatus and the boiler which concerns on 1st Embodiment of this disclosure. It is a partially enlarged vertical sectional view which showed the circumference of the roller which concerns on 1st Embodiment of this disclosure. It is a hardware block diagram of the control part which concerns on 1st Embodiment of this disclosure. It is a functional block diagram which showed the function which the control part which concerns on 1st Embodiment of this disclosure has. It is a figure which showed an example of correspondence information which concerns on 1st Embodiment of this disclosure. It is a figure which illustrated the correspondence relationship between the mill load factor and the hardgrove grindability index which concerns on 1st Embodiment of this disclosure. It is a figure which illustrated the correspondence relationship of the mill load factor and the wearability which concerns on 1st Embodiment of this disclosure. It is a figure which exemplifies the correspondence relationship between the mill motor load factor, and the wear property with respect to the coal type of the plurality of types of coal which concerns on 1st Embodiment of this disclosure. It is a figure which illustrated the correspondence relationship between the wear amount of a roller and the wear amount of a table liner which concerns on 1st Embodiment of this disclosure. It is a figure which showed the flowchart of the wear evaluation process which concerns on 1st Embodiment of this disclosure. It is a figure which shows the effect of the wear evaluation process which concerns on 1st Embodiment of this disclosure. It is a functional block diagram which showed the function which the control part which concerns on 2nd Embodiment of this disclosure has. It is a figure which shows the prediction result of the remaining life which concerns on 2nd Embodiment of this disclosure. It is a functional block diagram which showed the function which the control part which concerns on 3rd Embodiment of this disclosure has. It is a figure which shows the example of the system which concerns on the maintenance plan which concerns on 3rd Embodiment of this disclosure.

[First Embodiment]
Hereinafter, the wear evaluation system and the solid fuel crusher according to the present disclosure, the wear evaluation method, and the first embodiment of the wear evaluation program will be described with reference to the drawings. In this embodiment, the case where the wear evaluation system is applied to the solid fuel crusher 100 of the power plant 1 will be described.

As shown in FIG. 1, the power plant 1 according to the present embodiment includes a solid fuel crusher 100 and a boiler 200.

The solid fuel crusher 100 of the present embodiment crushes a solid fuel (carbon-containing solid fuel) such as coal or biomass fuel as an example, generates fine pulverized fuel, and supplies it to the burner portion (combustion device) 220 of the boiler 200. It is a device. The power plant 1 including the solid fuel crushing device 100 and the boiler 200 shown in FIG. 1 includes one solid fuel crushing device 100, and corresponds to each of the plurality of burner portions 220 of the one boiler 200. The system may be provided with a plurality of solid fuel crushing devices 100.

As shown in FIG. 1, the solid fuel crusher 100 of the present embodiment includes a mill (crushing unit) 10, a coal feeder (fuel supply unit) 20, a blower unit (transport gas supply unit) 30, and a state. It includes a detection unit (state detection device) 40 and a control unit (control device) 60.
In the present embodiment, "upper" means the direction of the vertically upper side, and "upper" such as the upper part and the upper surface means the part on the vertically upper side. Similarly, "bottom" indicates the part on the vertically lower side.

The mill 10 for crushing solid fuel such as coal or biomass fuel supplied to the boiler 200 into pulverized solid fuel, which is a pulverized solid fuel, may be in the form of crushing only coal or pulverizing only biomass fuel. It may be in the form of crushing biomass fuel together with coal, and the type of solid fuel is not limited. Here, the biomass fuel is a renewable organic resource derived from living organisms, for example, thinned wood, waste wood, drifting wood, grass, waste, sludge, tires, and recycled fuel (pellets and pellets) made from these. Chips), etc., and are not limited to those presented here. Since biomass fuel takes in carbon dioxide during the growth process of biomass, it is considered to be carbon-neutral, which does not emit carbon dioxide, which is a greenhouse gas, and its use is being studied in various ways.

The mill 10 is a classifier that rotationally drives a housing 11, a rotary table 12, a roller (crushing roller) 13, a drive unit 14, a rotary classifier 16, a fuel supply unit 17, and a rotary classifier 16. It includes a motor 18.
The housing 11 is formed in a tubular shape extending in the vertical direction, and is a housing that houses a rotary table 12, a roller 13, a rotary classifier 16, and a fuel supply unit 17. A fuel supply unit 17 is attached to the central portion of the ceiling portion 42 of the housing 11. The fuel supply unit 17 supplies the solid fuel guided from the bunker 21 into the housing 11, is arranged at a substantially central position of the housing 11 in the vertical direction, and the lower end portion extends to the inside of the housing 11. Has been done.

A drive unit 14 in which a speed reducer is connected to a mill motor 14a is installed near the bottom surface portion 41 of the housing 11, and a rotary table 12 that rotates by a driving force transmitted from the drive unit 14 is rotatably arranged. .. The rotary table 12 is a member having a circular shape in a plan view, and is arranged so that the lower ends of the fuel supply unit 17 face each other. The upper surface of the rotary table 12 may have an inclined shape such that the central portion is low and the rotary table 12 is high toward the outside, and the outer peripheral portion may be bent upward. The fuel supply unit 17 supplies solid fuel (for example, coal or biomass fuel in this embodiment) from the upper side to the lower rotary table 12, and the rotary table 12 crushes the supplied solid fuel with the roller 13. It is also called a crushing table. A table liner 12a is installed on the rotary table 12. That is, the solid fuel is crushed between the table liner 12a and the roller 13. In the present embodiment, the case where the table liner 12a is installed on the rotary table 12 will be described as an example, but the rotary table 12 and the table liner 12a may be formed as an integral table.

When the solid fuel is charged from the fuel supply unit 17 toward the substantially central region of the rotary table 12, the solid fuel is guided to the outer peripheral side of the rotary table 12 by the centrifugal force due to the rotation of the rotary table 12, and is connected to the roller 13. It is sandwiched between them and crushed. The crushed solid fuel is blown upward by the transport gas (hereinafter referred to as primary air) guided from the transport gas flow path (hereinafter referred to as primary air flow path) 100a, and rotates. It is led to the formula classifier 16. That is, an outlet (not shown) is provided on the outer periphery of the rotary table 12 to allow the primary air flowing in from the primary air flow path 100a to flow out into the space above the rotary table 12 in the housing 11. A vane (not shown) is installed at the air outlet to give a turning force to the primary air blown out from the air outlet. The primary air to which the swirling force is applied by the vane becomes an air flow having a swirling velocity component, and guides the solid fuel crushed on the rotary table 12 to the upper rotary classifier 16 in the housing 11. Of the crushed solid fuel mixed in the primary air, those having a particle size larger than the predetermined particle size are classified by the rotary classifier 16 or dropped without reaching the rotary classifier 16 and fall on the rotary table. It is returned to 12 and crushed again with the roller 13.

The roller 13 is a rotating body that crushes the solid fuel supplied from the fuel supply unit 17 to the rotary table 12. The roller 13 is pressed against the upper surface of the rotary table 12 and cooperates with the rotary table 12 to crush the solid fuel. In FIG. 1, only one roller 13 is represented as a representative, but a plurality of rollers 13 are arranged to face each other at regular intervals in the circumferential direction so as to press the upper surface of the rotary table 12. NS. For example, the three rollers 13 are arranged at equal intervals in the circumferential direction with an angular interval of 120 ° on the outer peripheral portion. In this case, the portion where the three rollers 13 are in contact with the upper surface of the rotary table 12 (the portion to be pressed) is equidistant from the rotation center axis of the rotary table 12.

The roller 13 can be swung up and down by the journal head 45, and is supported so as to be close to and separated from the upper surface of the rotary table 12. When the rotary table 12 rotates with the outer peripheral surface in contact with the solid fuel on the upper surface of the rotary table 12, the roller 13 receives rotational force from the rotary table 12 and rotates around the roller 13. When the solid fuel is supplied from the fuel supply unit 17, the solid fuel is pressed between the roller 13 and the rotary table 12 (that is, the table liner 12a) and crushed to become fine fuel. Since the roller 13 and the table liner 12a are worn by the crushing, they need to be repaired or replaced regularly. Therefore, the control unit 60, which will be described later, evaluates the wear.

The support arm 47 of the journal head 45 is supported on the side surface of the housing 11 by a support shaft 48 whose intermediate portion is along the horizontal direction so that the roller 13 can swing in the vertical direction around the support shaft 48. Further, a pressing device 49 is provided at the upper end portion on the vertically upper side of the support arm 47. The pressing device 49 is fixed to the housing 11 and applies a load to the roller 13 via the support arm 47 or the like so as to press the outer peripheral surface of the roller 13 against the rotary table 12.

An example of the detailed configuration of the roller 13 is shown in FIG. 2 (a partially enlarged vertical sectional view showing the periphery of the roller 13). The roller 13 is supported by the housing 11 by the roller support portion 55. The roller support portion 55 extends upward onto the support shaft 52 to which the roller 13 is attached, the main body 56 that holds the support shaft 52, the support shaft 48 that is fixedly attached to the side portion of the main body 56, and the upper surface of the main body 56. A support arm 47 attached so as to exist, and a protrusion 57 provided on the lower surface of the main body 56 so as to project downward are provided.

A hollow hub 51 having a substantially cylindrical shape is attached to the center of the roller 13. The roller 13 is attached to the tip of the support shaft 52 via the hub 51. That is, the roller 13 is attached to the support shaft 52 via the journal bearing (roller journal bearing) 59, so that the roller 13 can rotate around the support shaft 52 in the circumferential direction. The support shaft 48 is arranged so that its axis is substantially horizontal and extends in the tangential direction of the circular shape of the rotary table 12. The roller support portion 55 is rotatable about the support shaft 48, and the distance of the roller 13 to the rotary table 12 changes by rotating around the support shaft 48.

A pressing device 49 that presses the upper end of the support arm 47 is attached to the housing 11. The pressing device 49 includes an intermediate piston 53 attached to the housing 11 so as to be movable in the longitudinal direction, and a hydraulic load portion 54 attached to the outer periphery of the housing 11 to press the outer end portion of the intermediate piston 53. The inner end of the intermediate piston 53 is in contact with the outer peripheral side of the upper end of the support arm 47. The pressing device 49 generates a hydraulic load by the hydraulic load portion 54 and moves the intermediate piston 53 in the longitudinal direction to swing the roller support portion 55 around the support shaft 48. That is, the roller 13 is pressed against the rotary table 12 by the pressing device 49.

The protrusion 57 abuts on the stopper 58 when the roller support 55 swings around the support shaft 48 to a certain position. The stopper 58 functions as a limiting member that limits the amount of movement of the roller 13 in the direction of pressing the rotary table 12.

The drive unit 14 is a device that transmits a driving force to the rotary table 12 to rotate the rotary table 12 around a central axis (rotary axis). The drive unit 14 is connected to the mill motor 14a and generates a driving force for rotating the rotary table 12.

The rotary classifier 16 is provided on the upper part of the housing 11 and has a hollow substantially inverted conical outer shape. The rotary classifier 16 includes a plurality of blades 16a extending in the vertical direction at its outer peripheral position. The blades 16a are provided at predetermined intervals (equal intervals) around the central axis of the rotary classifier 16. Further, the rotary classifier 16 uses a solid fuel crushed by the roller 13 having a size larger than a predetermined particle size (for example, 70 to 100 μm for coal) (hereinafter, crushed solid fuel exceeding a predetermined particle size as “coarse powder”. It is a device that classifies fuel into (referred to as "fuel") and fuel having a predetermined particle size or less (hereinafter, crushed solid fuel having a predetermined particle size or less is referred to as "fine powder fuel"). The rotary classifier 16 that classifies by rotation is also called a rotary separator, and is given a rotational driving force by a classifier motor 18 controlled by a control unit 60, and has a cylindrical shaft extending in the vertical direction of the housing 11 (not shown). ), It rotates around the fuel supply unit 17.

In the crushed solid fuel that has reached the rotary classifier 16, due to the relative balance between the centrifugal force generated by the rotation of the blade 16a and the centripetal force due to the airflow of the primary air, the coarse powder fuel having a large diameter is produced by the blade 16a. It is knocked down, returned to the turntable 12, crushed again, and the pulverized fuel is guided to an outlet 19 at the ceiling 42 of the housing 11.
The pulverized fuel classified by the rotary classifier 16 is discharged from the outlet 19 to the supply flow path 100b, and is conveyed to the subsequent process together with the primary air. The pulverized fuel that has flowed out to the supply flow path 100b is supplied to the burner portion 220 of the boiler 200.

The fuel supply unit 17 is attached so that the lower end portion extends vertically to the inside of the housing 11 so as to penetrate the upper end of the housing 11, and the solid fuel input from the upper part of the fuel supply unit 17 is transferred to the rotary table 12. Supply to the approximately central region of. The fuel supply unit 17 is supplied with solid fuel from the coal feeder 20.

The coal feeder 20 includes a transport unit 22 and a coal feeder motor 23. The transport unit 22 transports the solid fuel discharged from the lower end portion of the down spout portion 24 directly under the bunker 21 by the driving force given from the coal feeder motor 23, and is guided to the fuel supply unit 17 of the mill 10.
Normally, primary air for transporting pulverized fuel, which is a crushed solid fuel, is supplied to the inside of the mill 10, and the pressure is increased. Fuel is held in a laminated state inside the down spout portion 24, which is a pipe extending in the vertical direction directly under the bunker 21, and the solid fuel layer laminated in the down spout portion 24 causes the mill 10 side. The sealing property is ensured so that the primary air and fine fuel do not flow back.
The amount of solid fuel supplied to the mill 10 may be adjusted by the belt speed of the belt conveyor of the transport unit 22.

On the other hand, the particles and pellets of the biomass fuel before crushing have a constant particle size (the size of the pellets) as compared with the coal fuel (that is, the particle size of the coal before crushing is, for example, about 2 to 50 mm). Is, for example, about 6 to 8 mm in diameter and about 40 mm or less in length), and is lightweight. Therefore, when the biomass fuel is stored in the down spout portion 24, the gap formed between the biomass fuels becomes larger than that in the case of the coal fuel.
Therefore, since there is a gap between the biomass fuel chips and pellets in the down spout portion 24, the primary air blown up from the inside of the mill 10 and the fine powder fuel pass through the gap formed between the respective biomass fuels, and the mill 10 The internal pressure may drop. Further, when the primary air blows into the storage portion of the bunker 21, the transportability of the biomass fuel in the solid fuel crusher 100 deteriorates, dust is generated inside the coal feeder 20 and the upper part of the bunker 21, the bunker 21 and the down spout portion 24 If the biomass fuel laminated inside is ignited or the pressure inside the mill 10 decreases, various problems may occur in the operation of the mill 10, such as a decrease in the amount of pulverized fuel transported to the burner portion 220. be. Therefore, even if a rotary valve (not shown) is provided in the middle of the fuel supply unit 17 from the coal feeder 20 to prevent the primary air and the pulverized fuel from being blown up toward the coal feeder 20 and the bunker 21. good.

The blower unit 30 is a device that dries the solid fuel crushed by the rollers 13 and blows primary air into the housing 11 for supplying the rotary classifier 16.
In this embodiment, the blower unit 30 cools the primary air ventilator (PAF: Primary Air Fan) 31, the hot gas flow path 30a, and the cold gas flow path 30a in order to adjust the primary air blown to the housing 11 to an appropriate temperature. It includes a gas flow path 30b, a hot gas damper 30c, and a cold gas damper 30d.

In the present embodiment, the heat gas flow path 30a heats a part of the air (outside air) sent from the primary air ventilator 31 through a heat exchanger (heater) 34 such as an air preheater. It is supplied as heat gas. A hot gas damper 30c (first blower portion) is provided on the downstream side of the hot gas flow path 30a. The opening degree of the heat gas damper 30c is controlled by the control unit 60. The flow rate of the hot gas supplied from the hot gas flow path 30a is determined by the opening degree of the hot gas damper 30c.

The cold gas flow path 30b supplies a part of the air sent out from the primary air ventilator 31 as cold gas at room temperature. A cold gas damper (second blower) 30d is provided on the downstream side of the cold gas flow path 30b. The opening degree of the cold gas damper 30d is controlled by the control unit 60. The flow rate of the cold gas supplied from the cold gas flow path 30b is determined by the opening degree of the cold gas damper 30d.

In the present embodiment, the flow rate of the primary air is the total flow rate of the hot gas supplied from the hot gas flow path 30a and the flow rate of the cold gas supplied from the cold gas flow path 30b, and the temperature of the primary air is the hot gas. It is determined by the mixing ratio of the hot gas supplied from the flow path 30a and the cold gas supplied from the cold gas flow path 30b, and is controlled by the control unit 60.
Further, a part of the combustion gas discharged from the boiler 200 is guided to the hot gas supplied from the hot gas flow path 30a via a gas recirculation ventilator (not shown) to form an air-fuel mixture, thereby forming the primary air flow path 100a. The oxygen concentration of the primary air flowing in from may be adjusted.

In the present embodiment, the state detection unit 40 of the mill 10 transmits the measured or detected data to the control unit 60. The state detection unit 40 of the present embodiment is, for example, a differential pressure measuring means, and is a portion where the primary air flows from the primary air flow path 100a into the mill 10 and the primary air and fine powder fuel from the inside of the mill 10 into the supply flow path 100b. The differential pressure with the outlet 19 discharged from the mill 10 is measured as the differential pressure in the mill 10 (the differential pressure between the gas flowing into the mill 10 and the gas discharged from the mill 10). For example, depending on the classification performance of the rotary classifier 16, the increase / decrease in the circulation amount of the crushed solid fuel circulating between the vicinity of the rotary classifier 16 and the vicinity of the rotary table 12 inside the mill 10 and the difference in the mill 10 with respect to this. The increase and decrease of pressure changes. That is, since the pulverized fuel discharged from the outlet 19 can be adjusted and managed with respect to the solid fuel supplied to the inside of the mill 10, the particle size of the pulverized fuel does not affect the combustibility of the burner portion 220. The amount of pulverized fuel corresponding to the amount of solid fuel supplied to the mill 10 can be stably supplied to the burner portion 220 provided in the boiler 200.
Further, the state detection unit 40 of the present embodiment is, for example, a temperature measuring means, and is the temperature of the primary air supplied to the inside of the housing 11 for blowing the solid fuel crushed by the roller 13 to the rotary classifier 16. , The temperature of the primary air up to the outlet 19 is detected inside the housing 11, and the blower portion 30 is controlled so as not to exceed the upper limit temperature. Since the primary air is cooled by transporting the crushed material while drying it in the housing 11, the temperature from the upper space of the housing 11 to the outlet 19 is, for example, about 60 to 90 degrees.

The boiler 200 burns using the fine fuel supplied from the solid fuel crusher 100 to generate steam. Therefore, the boiler 200 includes a furnace 210 and a burner portion 220.

The burner section 220 heats the primary air containing the pulverized fuel supplied from the supply flow path 100b and the air (outside air) sent out from the indented air ventilator (FDF: Feed Draft Fan) 32 by the heat exchanger 34. It is a device that forms a flame by burning fine fuel using the supplied secondary air. The pulverized fuel is burned in the furnace 210, and the high-temperature combustion gas is discharged to the outside of the boiler 200 after passing through heat exchangers (not shown) such as an evaporator, a superheater, and an economizer.

The combustion gas discharged from the boiler 200 is subjected to a predetermined treatment by an environmental device (not shown by a denitration device, an electrostatic collector, etc.), and is sent from the primary air ventilator 31 by a heat exchanger 34 such as an air preheater, for example. Heat exchange is performed between the air and the air sent from the forced air ventilator 32, and the air is guided to the chimney (not shown) via the induced draft fan (IDF) 33 and discharged to the outside air. NS. The air sent from the primary air ventilator 31 heated by the combustion gas in the heat exchanger 34 is supplied to the hot gas flow path 30a described above.
The water supply to each heat exchanger of the boiler 200 is heated in a coal saver (not shown) and then further heated by an evaporator (not shown) and a superheater (not shown) to generate high-temperature and high-pressure steam. , The steam turbine is sent to the steam turbine (not shown), which is a power generation unit, to rotate drive the steam turbine, and the generator connected to the steam turbine (not shown) is driven to rotate to generate electricity, which constitutes the power generation plant 1. ..

The control unit 60 is a device that controls each part of the solid fuel crushing device 100. The control unit 60 may control the rotation speed of the rotary table 12 with respect to the operation of the mill 10 by transmitting a drive instruction to the mill motor 14a, for example. The control unit 60 adjusts the classification performance by, for example, transmitting a drive instruction to the classifier motor 18 of the rotary classifier 16 to control the rotation speed, thereby adjusting the differential pressure in the mill 10 to a predetermined range. It can be optimized to stabilize the supply of pulverized fuel. Further, the control unit 60 transmits a drive instruction to, for example, the coal feeder motor 23 of the coal feeder 20, so that the transport unit 22 conveys the solid fuel and supplies the solid fuel to the fuel supply unit 17 (the supply amount of the solid fuel ( The amount of coal supply) can be adjusted. Further, the control unit 60 can control the opening degree of the hot gas damper 30c and the cold gas damper 30d to control the flow rate and temperature of the primary air by transmitting the opening degree instruction to the blower unit 30. Specifically, the control unit 60 controls the hot gas damper 30c and the cold gas damper 30d so that the flow rate of the conveyed gas and the outlet temperature become predetermined values set for the amount of coal supplied for each solid fuel type. .. Further, the control unit 60 controls the oil pressure applied to the hydraulic load unit 54 of the pressing device 49 according to, for example, the supply amount of solid fuel and the rotation speed of the rotary classifier 16, so that the roller 13 rotates the rotary table. The force pressed by the 12 is optimized, and stable solid fuel crushing is possible.

Further, the control unit 60 evaluates wear for estimating the life of the roller 13 in the mill 10 and the remaining life of the table liner 12a installed on the rotary table 12. That is, the control unit 60 has a function as a wear evaluation system for estimating the remaining life. Although the roller 13 and the table liner 12a, which are the parts where wear occurs in the mill 10, are made of a material having high wear resistance, the wear progresses with long-term use. Therefore, it is necessary to carry out regular inspections and repair or replace them. The mill 10 crushes solid fuel such as coal and biomass fuel charged into the table liner 12a into fine powder fuel by chewing between the table liner 12a and the roller 13. The mill 10 is worn when the rollers 13 and the table liner 12a come into contact with the solid fuel, and when the amount of wear increases, the crushing performance deteriorates. Therefore, it is necessary to perform maintenance or replacement at an appropriate time.

Therefore, the control unit 60 evaluates the wear of the roller 13 and the table liner 12a in the mill 10. In the present embodiment, the case where the roller 13 and the table liner 12a are evaluated individually will be described, but either one may be evaluated. Further, the wear evaluation is an evaluation related to wear caused by crushing of solid fuel, and includes a wear amount evaluation, a wear rate evaluation, a life evaluation due to wear (remaining life evaluation), and the like. In the present embodiment, as the wear evaluation, a case of evaluating the remaining life due to wear will be described. The function as the remaining life estimation system may be provided in a control device different from the control unit 60. In estimating the remaining life with high accuracy, wear evaluation according to this embodiment is performed.

FIG. 3 is a diagram showing an example of the hardware configuration of the control unit 60 according to the present embodiment.
As shown in FIG. 3, the control unit 60 is a computer system (computer system), for example, a CPU 110, a ROM (Read Only Memory) 120 for storing a program or the like executed by the CPU 110, and when each program is executed. It is provided with a RAM (Random Access Memory) 130 that functions as a work area of the above, a hard disk drive (HDD) 140 as a large-capacity storage device, and a communication unit 150 for connecting to a network or the like. Each of these parts is connected via a bus 180. A solid state drive (SSD) can also be used as the large-capacity storage device.

Further, the control unit 60 may include an input unit including a keyboard, a mouse, and the like, a display unit including a liquid crystal display device for displaying data, and the like.

The storage medium for storing the program or the like executed by the CPU 110 is not limited to the ROM 120. For example, it may be another auxiliary storage device such as a magnetic disk, a magneto-optical disk, or a semiconductor memory.

A series of processing processes for realizing various functions described later is recorded in the HDD 140 or the like in the form of a program, and the CPU 110 reads this program into the RAM 130 or the like and executes information processing / calculation processing. , Various functions described later are realized. The program is installed in ROM 120 or other storage medium in advance, is provided in a state of being stored in a computer-readable storage medium, or is distributed via a wired or wireless communication means. Etc. may be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like. Further, the HDD 140 may be replaced with a solid state disk (SSD) or the like.

FIG. 4 is a functional block diagram showing functions related to the wear evaluation system included in the control unit 60. As shown in FIG. 4, the control unit 60 includes an acquisition unit 62, a specific unit 63, and an evaluation unit 64.

The acquisition unit 62 acquires the measured values related to the operating state of the solid fuel crusher 100. That is, the acquisition unit 62 acquires the measured values for the preset parameters related to the operating state. In the present embodiment, the input current of the mill motor 14a for rotationally driving the rotary table 12 (hereinafter referred to as “mill motor current”) is measured by an ammeter (not shown) provided in the power supply unit (not shown) of the mill motor 14a. Then, the case where the acquisition unit 62 acquires the measured value of the mill motor current will be described. By using the mill motor current, the output power of the mill motor 14a, that is, the input power to the drive unit 14 (hereinafter referred to as "mill motor power") is obtained as the operating state from the characteristics of the current and output power of the mill motor 14a prepared in advance. be able to. The mill motor power may be directly measured as the input power (power) to the mill motor 14a or the output power of the mill motor 14a, instead of being converted from the current value supplied to the mill motor.

In the present embodiment, the case where the mill motor power (mill motor current) is used as the operating state will be described, but if it is a parameter representing the operating state of the mill 10 having a correlation with the wear in the mill 10, it is not limited to the mill motor power and is used. be able to. That is, a parameter representing the load state in the mill 10 can be used as the operating state when the wear evaluation is performed. Since the load state of the mill 10 changes depending on the properties and the amount of solid fuel supplied to the mill 10, the load state of the mill 10 can be used as the operating state. More specifically, the load state of the mill 10 used as the operating state is at least one of "power index of mill 10", "crushing load index of mill 10", and "table differential pressure of mill 10". Can include.

The power index of the mill 10 is an index value of the power required for crushing in the mill 10, and is, for example, the mill motor power as described above. Further, as long as the power corresponds to the load state of the mill 10, it can be used without being limited to the mill motor power depending on the crushing method.

The crushing load index of the mill 10 is a mill motor load factor or a mill capacity load factor. The mill motor load factor is the ratio of the mill motor power under a specific operating condition (mill motor power / motor rated power under a specific operating condition) to the motor rated power of the mill motor 14a, and indicates the load state with respect to the mill motor 14a. The mill capacity load factor is the ratio of the processing capacity of the mill 10 under a specific operating condition (mill capacity under specific operating conditions / mill rated capacity) to the rated capacity of the mill 10 (mill capacity under the design planning conditions of the mill 10). .. Specifically, the mill capacity load factor can be understood as the ratio of the current crushing capacity (ton / h) to the standard crushing capacity (mill rated capacity, ton / h) under the design planning conditions of the mill 10.

The table differential pressure of the mill 10 is the differential pressure value between the gas flowing into the mill 10 and the gas discharged from the mill 10, but when the ratio is the same as other information, the table differential pressure is rated. The ratio of the table differential pressure under the specific operating conditions (table differential pressure / rated table differential pressure under the specific operating conditions) to the table differential pressure (table differential pressure under the design planning conditions of the mill 10) may be used.

As described above, the operating state acquired by the acquisition unit 62 can be appropriately set in addition to the above as long as it is a physical quantity related to the load state of the mill 10. In this embodiment, a case where the operating state is the power of the mill motor will be illustrated. It can be applied in the same manner even when other operating conditions are used.

In order to improve the accuracy of the load state of the mill 10 used as the operating state, it is possible to include at least one of the solid fuel supply amount (coal supply amount) and the solid fuel moisture information in the operating state. Is.

The water content information is an estimated value of the water content of the solid fuel supplied to the mill 10. Moisture information can be calculated based on the mass heat balance calculated from information such as the amount of coal supplied, the primary air flow rate, the mill outlet temperature, and the mill inlet temperature. For example, by correcting the mill capacity load factor based on the amount of coal supplied and the water content information, it is possible to calculate a more accurate mill capacity load factor. For example, when the amount of coal supply is constant, the load state of the mill 10 is higher when the water content of the solid fuel is large, while when the water content of the solid fuel is constant, the load state of the mill 10 is higher when the water content of the solid fuel is large. Judge that the condition is high. In this way, by reflecting the coal supply amount and the water content information with respect to the load state of the mill 10, the load state can be estimated more accurately, and the wear evaluation can be performed more accurately as described later. It becomes.

Further, the measurement result of the fineness (particle size information) of the solid fuel discharged from the mill 10 may be reflected with respect to the load state of the mill 10. For example, when the amount of coal supplied and the amount of water in the solid fuel are constant, it is determined that the higher the degree of fineness (smaller particle size), the higher the load state of the mill 10.

The specific unit 63 provides correspondence information in which the operating state of the mill 10 and the wear resistance evaluation information are associated with each of the plurality of classes set according to the type of solid fuel (including the difference in coal type of coal). Based on this, the wear resistance evaluation information corresponding to the measured value is specified. Specifically, the specifying unit 63 specifies wear resistance evaluation information corresponding to the operating state of the mill 10 based on the corresponding information classified and organized in, for example, an evaluation table. The wear resistance evaluation information is information for evaluating the wear state of the mill 10 due to crushing of solid fuel, and is based on, for example, a value for each parameter factor.

Solid fuels such as coal have different effects on the wear of the mill 10 due to differences in the content of wear components (for example, silica) depending on the type. However, in the power plant 1 corresponding to a plurality of solid fuel types (coal types, etc.), the operation may be performed by switching the coal types supplied to the solid fuel crusher 100. That is, in order to more accurately evaluate the wear of the mill 10, it is necessary to fully consider the effect of switching the coal type (that is, the effect of the properties of the solid fuel type such as coal used). Therefore, in the specific unit 63, correspondence information in which a plurality of classes are set according to each coal type may be used. The correspondence information may be stored in the storage unit in the control unit 60, or the correspondence information data stored in the remote device may be downloaded and referred to at the time of evaluation execution.

FIG. 5 is a diagram showing an example of correspondence information. FIG. 5 illustrates a case where the classes are divided into three stages, for example, A, B, and C, but the number of classes is not limited. It is preferable that the number of classes is smaller than the number of types of solid fuels that are planned to be used. This is because, depending on the required design requirements of the power plant 1, there may be hundreds of candidates for the type of solid fuel to be used, so the class of coal type to be selected at the time of wear evaluation is erroneously selected. It is possible to prevent the wear resistance evaluation from being erroneously determined. For example, the classes are preferably divided into 2 or more and 5 or less. It is also possible to set the class according to each coal type. Further, wear resistance evaluation information is set for each class, and if the corresponding wear resistance evaluation information can be specified from the operating state, the case is not limited to the case where it is configured in a table format.

In FIG. 5, for example, A, B, and C are set as the class of solid fuel. The class is a classification in which a plurality of types of solid fuels scheduled to be used in the power plant 1 are set according to the similarity in terms of wear resistance to the mill 10. The degree of similarity regarding wearability is an index indicating that the degree of influence on wear (wearability evaluation) of the mill 10 is similar. In FIG. 5, A is a class in which the degree of influence on the wear of the mill 10 (wear resistance evaluation) is low, and B is a class in which the degree of influence on the wear of the mill 10 (wear resistance evaluation) is between A and C. Yes, C is a class with a high degree of influence on wear (wear resistance evaluation) of the mill 10. In other words, the mill 10 is classified according to the tendency of wear of the mill 10, and in the example of FIG. 5, the class has the highest degree of wear of the mill 10 in the order of A, B, and C.

Specifically, the classification may be set according to the Hardgrove Grindability Index of each solid fuel. The Hardgrove Grindability Index (HGI) is an index showing the ease of crushing solid fuel. The higher the Hardgrove Grindability Index, the easier it is to grind, while the lower the Hardgrove Grindability Index, the easier it is for the mill 10 to wear. Therefore, A is the class when the hardgrove grindability index is high (for example, greater than 55 for coal), and B is the class when the hardgrove grindability index is medium (for example, 45 or more and 55 or less for coal). C is the class when the Hardgrove Grindability Index is low (for example, less than 45 for coal).

The classification is not limited to the case of classifying based on the hardgrove grindability index, and for example, the parameters indicating the load state of the mill 10 such as the mill motor power, the mill motor load factor, the mill capacity load factor, and the table differential pressure can be used. It may be divided based on.

In FIG. 5, the mill motor load factor, the mill capacity load factor, and the table differential pressure are also set corresponding to each class. Regarding the mill motor load factor, A is the class when the mill motor load factor is low (for example, 40% or more and less than 60%), and B is the class when the mill motor load factor is medium (for example, 60% or more and less than 80%). C is a class when the mill motor load factor is high (for example, 80% or more and less than 100%). Regarding the mill capacity load factor, A is a class when the mill capacity load factor is low, B is a class when the mill capacity load factor is medium, and C is a class when the mill capacity load factor is high. Regarding the table differential pressure, A is the class when the table differential pressure is low (for example, 1.5 kPa or more and less than 2.5 kPa for coal), and B is the class when the table differential pressure is medium (for example, 2.5 kPa or more and 3.5 kPa for coal). (Less than), and C is the class when the table differential pressure is high (for example, 3.5 kPa or more and less than 4.5 kPa for coal). In this way, the corresponding information is set by classifying the operating state (load state of the mill 10) corresponding to each class.

For example, the mill motor load factor at a specific coal supply amount and the HGI (Hardgrove Grindability Index) have a correspondence relationship as shown in FIG. That is, the higher the HGI, the lower the mill motor load factor. The higher the HGI, the easier it is for the solid fuel to be crushed, so that the load state in the mill 10 becomes lower. Since the mill motor load factor and HGI correspond to each other as shown in FIG. 6, they can be classified according to each other. Further, when the mill motor load factor is low, the mill capacity load factor is low, and when the mill motor load factor is high, the mill capacity load factor is high. Similar classification is possible with the horizontal axis as the mill power index (mill motor power value), mill capacity load factor, and table differential pressure.

For example, the mill motor load factor at a specific coal supply amount and the wear resistance of the mill 10 have a correspondence relationship as shown in FIG. 7. That is, the higher the load factor of the mill motor, the higher the wear resistance of the mill 10. The higher the load factor of the mill motor, the higher the load state in the mill 10. Since the mill motor load factor and the wear resistance of the mill 10 correspond as shown in FIG. 7, they can be classified according to each. Further, when the mill motor load factor is low, the mill capacity load factor is low, and when the mill motor load factor is high, the mill capacity load factor is high. Similar classification is possible with the horizontal axis as the mill power index (mill motor power value), mill capacity load factor, and table differential pressure.

Then, in the corresponding information, as shown in FIG. 5, wear resistance evaluation information is set corresponding to each class. The wear resistance evaluation information is information for evaluating the wear state of the mill 10 due to crushing of solid fuel, and for example, values for each parameter factor are set. Specifically, in the present embodiment, since wear evaluation is performed by the equation (1) or the like described later, the wear resistance evaluation information is the value of the parameter (wear resistance evaluation factor) substituted in the equation (1) or the like. .. The wear resistance evaluation factor is a factor indicating the type and amount of wear components contained in the solid fuel. In the correspondence information, wear resistance evaluation factors are set corresponding to each class. _{Specifically, the wear resistance evaluation factors include the parameters (ASH, Fe 2} O ₃ , SiO ₂ , Al ₂ O ₃ , Ig) used in the formulas (1), (2), and (3) described later. Is. That is, each parameter (ASH (A), Fe ₂ O ₃ (A), SiO ₂ (A), Al ₂ O ₃ (A), Ig (A)) is set corresponding to the class of A, and B Each parameter (ASH (B), Fe ₂ O ₃ (B), SiO ₂ (B), Al ₂ O ₃ (B), Ig (B)) is set corresponding to the class of C, and corresponds to the class of C. Then, each parameter (ASH (C), Fe ₂ O ₃ (C), SiO ₂ (C), Al ₂ O ₃ (C), Ig (C)) is set. The wear resistance evaluation factor corresponding to each class may be set based on the typical solid fuel properties of each class. A typical method for setting the value of the solid fuel wear resistance evaluation factor may be, for example, the average value of the solid fuel wear resistance evaluation factor in each class, or the wear of the mill 10 occurs most in each class. It may be the value of the wear resistance evaluation factor of the solid fuel which is easy to be used.

As described above, in the corresponding information, the operating state and the wear resistance evaluation information (wear resistance evaluation factor) are associated with each class. Therefore, in the specific unit 63, by referring to the corresponding information, it is possible to select the class corresponding to the measured value related to the operating state acquired by the acquisition unit 62 and specify the value of the corresponding wear resistance evaluation factor. It becomes.

Specifically, when the mill motor current is acquired by the acquisition unit 62, the mill motor power is derived, and the mill motor load factor is calculated as the ratio of the mill motor power to the motor rated power (mill motor rated power) of the mill motor 14a. Then, the class corresponding to the calculated mill motor load factor is determined, and the wear resistance evaluation information in the class is specified. In this way, the identification unit 63 can specify the wear resistance evaluation factor as the wear resistance evaluation information corresponding to the current operating state (for example, the mill motor load factor).

According to the correspondence information, it is possible to specify the wear resistance evaluation information corresponding to the pre-divided class. That is, it is possible to automatically discriminate the class from the acquired operating state (load state of the mill 10) and acquire the corresponding wear resistance evaluation information.

FIG. 8 illustrates the correspondence between the load factor of the mill motor and the wear resistance of more than 100 types of coal used in a plurality of power plants (plants P1 to P5) in total. In the correspondence information, it is preferable that the number of classes is smaller than the number of types of solid fuel. For example, even if the type of coal used in the power plant 1 is planned to exceed 100 types as shown in FIG. 8, it can be classified into a number less than 100 types according to the degree of similarity. For example, even if there are more than 100 types of coal to be used, it is possible to classify them into three stages. For this reason, the wear resistance is more efficient than the case where all the coal types of the solid fuel to be used are individually discriminated and the wear resistance is evaluated using the individual wear resistance evaluation information. It is possible to specify the evaluation information. In addition, in order to specify the wear resistance evaluation information corresponding to the appropriate class from the operating state (load state of the mill 10), the corresponding wear resistance evaluation is performed even when a plurality of types of coal types are mixed and crushed. Information can be identified appropriately.

The wear evaluation information (wear resistance evaluation factor) specified in the specific unit 63 is used in the wear evaluation in estimating the remaining life in the evaluation unit 64, which will be described later.

The evaluation unit 64 evaluates the wear on the mill 10 based on the specified wear resistance evaluation information. Specifically, the evaluation unit 64 estimates the remaining life as a wear evaluation using the specified wear resistance evaluation factor.

The evaluation unit 64 calculates the wear rate Vw using the following formula (1). The wear rate Vw indicates the amount of wear that progresses per unit time.

In the above formula (1), Vw is the total wear rate of the roller 13 and the table liner 12a, K is a coefficient, P is the mill motor load factor (mill motor power / mill motor rated power), and Iw is included in the solid fuel used. It is a value set based on the wear component, and Ig is a value set based on the grindability of solid fuel (HGI: Hardgrove Grindability Index). Iw is calculated by the following formula (2).

In the formula (2), a, b, c, d, e is a constant set in advance, ASH is the percentage of ash in the solid fuel, the ratio of _Fe 2 _{O 3} of _Fe 2 _{O 3} is in the ash in and, SiO ₂ is the ratio of SiO ₂ in the ash, _Al 2 _{O 3} is a proportion of _Al 2 _{O 3} in the ash.

_{That is, Iw is calculated by the formula (2) using the values of ASH, Fe 2} O ₃ , SiO ₂ , and Al ₂ O _{3 in} the specified wear resistance evaluation factor, and the Iw and the Ig in the wear resistance evaluation factor are calculated. , The wear rate Vw is calculated from the equation (1) by using K which is a predetermined coefficient and the mill motor load factor P acquired by the acquisition unit. In FIG. 5, Ig, which is one of the wear resistance evaluation factors, may be set as a wear resistance evaluation factor with different values corresponding to the difference in HGI of coal for each class.

Then, the evaluation unit 64 evaluates each of the roller 13 and the table liner 12a based on the wear ratio of the roller 13 and the table liner 12a constituting the mill 10. FIG. 9 is a diagram showing the relationship between the amount of wear of the roller 13 and the amount of wear of the table liner 12a with the amount of wear that has been grasped in advance from past measured values and past experience, and the solid line is the roller 13. The broken line shows the amount of wear of the table liner 12a. As shown in FIG. 9, the amount of wear of the roller 13 is a certain ratio (1 or more) times the amount of wear of the table liner 12a. The ratio is, for example, in the range of 1.2 times or more and 2.5 times or less from the past actual value, and the value of an appropriate ratio is obtained by measuring the amount of wear at the opportunity of open maintenance to be carried out in the middle. Can be selected. As described above, there is a correlation (wear ratio) between the amount of wear of the roller 13 and the amount of wear of the table liner 12a. Therefore, for example, the wear rates of the roller 13 and the table liner 12a can be calculated based on the relationship of FIG. 9 (by distributing them in proportion) from the wear rates calculated by the equation (1).

As described above, the correlation (wear ratio) between the wear rate Vw of the roller 13 and the table liner 12a obtained from the equation (1) and the wear amount of the roller 13 and the wear amount of the table liner 12a is used. When the wear rate Vwr of the roller 13 is calculated, the remaining life θRC of the roller 13 is calculated by the following equation (3).

In formula (3), δRr is the maximum allowable wear amount of the roller 13 and is determined by the design of the mill 10. That is, in the equation (3), the remaining life θRCr of the roller 13 is estimated by using the wear rate Vwr of the roller 13 and the maximum allowable wear amount δRr which is the design value.

Similarly, when the wear rate Vwt of the table liner 12a is calculated, the remaining life θRCt of the table liner 12a is calculated by the following equation (4).

In formula (4), δRt is the maximum allowable wear amount of the table liner 12a, which is determined by the design of the mill 10. That is, in the equation (4), the remaining life θRCt of the table liner 12a is estimated by using the wear rate Vwt of the table liner 12a and the maximum allowable wear amount δRt which is the design value.

As a result, the remaining life θRCr of the roller 13 and the remaining life θRCt of the table liner 12a can be evaluated separately with high accuracy, and a maintenance plan suitable for each can be proposed.

In the above example, the case where the remaining life of the mill 10 is evaluated based on the wear resistance evaluation information has been described, but the wear rate is estimated based on the wear property evaluation information and the wear amount of the mill 10 is evaluated based on the wear rate. It may be that.

Next, an example of the wear evaluation process by the control unit 60 described above will be described with reference to FIG. FIG. 10 is a flowchart showing an example of the procedure of the wear evaluation process according to the present embodiment. The flow shown in FIG. 10 is executed when, for example, an operator or the like gives an instruction to start wear evaluation. The wear evaluation process may be executed periodically even if there is no start instruction from the operator or the like.

First, the measured value related to the operating state is acquired (S101). For example, in S101, the mill motor current is acquired.

Then, based on the corresponding information, the wear resistance evaluation information corresponding to the operating state is specified (S102). For example, in S102, the mill motor load factor is calculated from the acquired mill motor current, and in the corresponding information, the value of the wear resistance evaluation factor is specified as the wear resistance evaluation information of the class corresponding to the calculated mill motor load factor.

Then, the wear evaluation in the mill 10 is performed based on the value of the wear property evaluation factor as the wear property evaluation information (S103). For example, in S103, wear evaluation of the roller 13 and the table liner 12a is performed based on the correlation (wear ratio) of the formulas (1) to (4) and FIG. 9 by the wear resistance evaluation factor. For wear evaluation, the remaining life of the roller 13 and the table liner 12a is estimated. Further, the wear rate and the amount of wear may be evaluated.

Next, the effect of the above-mentioned wear evaluation process will be described with reference to FIG. In FIG. 11, the vertical axis represents the amount of wear and the power of the mill motor, and the horizontal axis represents time. Then, in FIG. 11, the transition of the wear amount of the mill 10 estimated by the wear evaluation process in the present embodiment is shown by a solid line as L1. In FIG. 11, the case where the remaining life is estimated without considering the switching of the coal type in the operation of the power plant 1 is used as a reference example, and the transition of the estimated wear amount of the mill 10 in the case of the reference example is taken as Le as a alternate long and short dash line. Shown.

As shown in FIG. 11, the coal type is switched by the operation of the power plant 1 at the time T1, T2, and T3, and the mill motor power also fluctuates with the switching of the coal type. That is, when the mill motor power is low, the class is estimated to be A, when the mill motor power is medium, the class is estimated to be B, and when the mill motor power is high, the class is estimated to be C. That is, the classes are switched in the order of A, B, C, and A as the coal type is switched. Since it is not possible to recognize the change of coal type in the transition Le of the wear amount of the mill 10 in the reference example, for example, assuming a certain coal type, the transition Le of the wear amount of the mill 10 is monotonous in proportion to the time. Is estimated to increase to. On the other hand, in the transition L1 of the wear amount of the mill 10 estimated by the wear evaluation process in the present embodiment, the class is discriminated as the coal type is switched. Therefore, wear evaluation can be performed based on the wear resistance evaluation information corresponding to each class. That is, as shown in FIG. 11, it is possible to estimate the transition L1 of the increase in the amount of wear of the mill 10 so as to correspond to the switching of the coal type. Since the amount of wear of the mill 10 can be evaluated more accurately, the remaining life can be estimated with high accuracy. Note that FIG. 11 shows an example in which the amount of coal supplied is constant for the sake of simplicity, although the power of the mill motor varies depending on the amount of coal supplied, for example. For example, if the mill motor power is divided by the coal supply amount and the mill motor power is evaluated per unit coal supply amount, it is possible to evaluate the wear in consideration of the influence of the fluctuation of the coal supply amount.

As described above, in the wear evaluation process, it is possible to perform wear evaluation more accurately by reflecting changes in the operating state of the mill 10 and intermediate changes in the solid fuel actually used. In other words, maintenance costs may increase if replacement is performed with a margin assuming that the reliability of wear evaluation is low, but since highly reliable wear evaluation is possible, the remaining life can be estimated. The accuracy can be high. As a result, maintenance can be performed efficiently at a more appropriate time for maintenance such as replacement with a margin, and maintenance costs can be reduced, parts can be replaced, and waste generation due to maintenance work can be suppressed. be able to. Since the wear evaluation is performed based on the measured values related to the operating state, it is not necessary to stop the operation and directly measure the wear amount of the mill 10, and the wear evaluation can be performed in real time even during the operation. Therefore, it is possible to suppress a decrease in the operating rate of the mill 10 and suppress a decrease in the operating rate of the solid fuel crusher 100. Then, since the class is determined based on the measured value related to the operating state, a human error occurs in the selection of the wear resistance evaluation information as compared with the case where the wear evaluation is performed for each type of solid fuel by the operator or the like. Can be suppressed and wear evaluation can be performed accurately.

As described above, according to the wear evaluation system, the solid fuel crusher, the wear evaluation method, and the wear evaluation program according to the present embodiment, classes are set according to the type of solid fuel, and each class is set. Since the operating state of the solid fuel crusher 100 and the wear resistance evaluation information of the mill 10 are associated with each other, it is possible to specify the wear resistance evaluation information corresponding to the operating state from the acquired measured values related to the operating state. can. That is, it is possible to specify wear resistance evaluation information according to the type of solid fuel according to the operating state, and based on the wear resistance evaluation information, wear evaluation of the mill 10 generated by crushing the solid fuel is performed. Can be done. The wear resistance evaluation information is information for evaluating the wear state of the mill 10 due to crushing of solid fuel.

Since the wear is evaluated based on the measured values related to the operating state, the evaluation can be performed without stopping the solid fuel crushing device 100. That is, stable operation can be continued, and the operating rate of the solid fuel crusher 100 can be improved. In addition, since the wear resistance evaluation information is specified by the measured values related to the operating state, it is possible to reduce the labor involved in selecting the wear resistance evaluation information for each solid fuel type and suppress human error related to the selection. , It is possible to accurately evaluate wear.

Since wear evaluation can be performed according to the class, wear evaluation can be performed according to each coal type (property) even when the power generation plant 1 switches the coal type for operation. can. That is, a great deal of labor is required when the wear resistance evaluation factors are individually set on the same base for a large number of solid fuels to be used and the wear amount of the mill 10 associated with the mill motor power is calculated. By dividing the solid fuel into similar classes and associating the operating state of the mill 10 with the wear resistance evaluation information, it is possible to efficiently improve the estimation accuracy of the remaining life. Since the evaluation can be performed more accurately, the maintenance time and frequency can be set more appropriately. That is, the mill 10 can be used for a longer period of time.

By assuming that the number of the above-mentioned classes is smaller than the number of types of solid fuels, it is possible to efficiently evaluate the wear. For example, the complexity of the processing can be suppressed as compared with the case where the wear resistance evaluation information is associated with all types of solid fuel.

By individually estimating and managing the remaining life of the roller 13 and the table liner 12a, it is possible to predict the maintenance time of each of them more accurately. You can save time. Therefore, the replacement cycle of each part can be extended, the mill operating rate can be improved, the maintenance cost can be reduced, and the waste generated at the time of replacement can be reduced.

[Second Embodiment]
Next, the wear evaluation system and the solid fuel crusher according to the second embodiment of the present disclosure, the wear evaluation method, and the wear evaluation program will be described.
In the present embodiment, the change transition of the remaining life in the future is estimated. Hereinafter, the wear evaluation system, the solid fuel crusher, the wear evaluation method, and the wear evaluation program according to the present embodiment will be mainly described with respect to the differences from the first embodiment.

As shown in FIG. 12, the control unit 60 in the present embodiment further includes a prediction unit 65.
The prediction unit 65 is in the future from the transition of the remaining life estimated by the evaluation unit 64 based on the database in which the operating state (operating state data) of the mill 10 and the remaining life transition characteristic corresponding to the operating state are accumulated in advance. Predict changes in remaining life. The remaining life estimation characteristic is information showing the characteristic of the remaining life that changes depending on the operating state, and specifically, shows the correlation between the operating time and the remaining life as shown in A, B, and C of FIG. Curve characteristics (may be straight lines). That is, the database stores the past or present operation information of the mill 10. The database may store the past or present operation data of the mill 10 whose life is to be estimated, or may store the past operation data of other mills 10 having similar configurations. Further, not only the actual operation data but also the virtually simulated data may be stored in the database. The database may be provided in the control unit 60 (storage unit) or may be provided in another device. The operating status includes information on the type of solid fuel (coal type information, fuel type information, etc.), solid fuel supply amount (coal supply amount), and load applied to the roller 13 (load added for crushing hydraulic load, etc.). , The rotation speed of the classifier (rotary classifier 16) provided in the mill 10 (classifier rotation speed), the gas flowing into the mill 10 (transport gas) and the gas discharged from the mill 10 (fine fuel). It includes at least one of the differential pressure (table differential pressure) from the mixed gas of the transport gas), the mill motor power of the mill 10, and the operating time. The differential pressure is a differential pressure (table differential pressure) in the mill 10, and is an index indicating a load state of the mill 10. For example, the table differential pressure is generated between the upper atmosphere and the lower atmosphere of the rotary table 12. The operating state is not limited to the above and can be included as long as it is a parameter that affects the life of the roller 13 and the table liner 12a. Further, it is determined that the changes in the remaining life with respect to the operating time are the same within a predetermined range between similar operating states. Matching within a predetermined range means, for example, matching within ± 10% excluding driving information (estimated remaining life) that is clearly judged to be out of order, and more preferably within ± 5%. be. If there is a match within a predetermined range, it may be determined that the data are similar by raising the priority among the data of similar operating conditions.

Specifically, the prediction unit 65 refers to the database, selects data on an operating state similar to the operating state of the mill 10 whose remaining life is estimated, and corresponds to the data on the similar operating state. Select and acquire life transition characteristics. The data of the similar operating state is the data of the operating state in which the degree of influence of the remaining life on the estimated remaining life is estimated to be similar to the operating state of the mill 10 for which the remaining life is estimated. For example, when selecting by using the type of solid fuel as the operating state, the change in the remaining life with respect to the operating time is changed from the viewpoint of the degree of influence of the remaining life on the solid fuel of the mill 10 whose remaining life is estimated. An operating state containing solid fuel, which is assumed to have similar effects, becomes a similar operating state. It should be noted that the priority of the similarity judgment is set for each parameter of the operating state, and the judgment is made by increasing the weight for the similarity judgment for the parameters having a high priority (for example, the type of solid fuel and HGI). good.

FIG. 13 shows an example in which a plurality of remaining life transition characteristics in a similar operating state are selected for the mill 10 for which the remaining life is estimated. In FIG. 13, as the remaining life transition characteristic, the characteristic A is shown by a solid line, the characteristic B is shown by a broken line, and the characteristic C is shown by a dash-dotted line as a selected example. Further, the transition characteristic E for estimating the remaining life, which will be described later, shows the transition as a result of evaluating the remaining life with a thick solid line. Then, in FIG. 13, E1 (first estimation result) and E2 (second estimation), which are the estimation results of the remaining life when the operation time performed on the mill 10 which is the target of the remaining life estimation have elapsed, are obtained. Result) and En (nth estimation result) are shown.

From the selected remaining life transition characteristics (A, B, C), the prediction unit 65 estimates the remaining life from E1 to En as a result of estimating the remaining life of the mill 10 which is the target of estimating the remaining life. The remaining life transition characteristics (A, B, C) having the transition characteristics similar to the transition characteristics E based on the above are specified. In the example of FIG. 13, since the transition characteristic E of the remaining life from E1 to En, which is the estimation result, is similar to the characteristic B, the characteristic B is specified. Therefore, it is estimated that the mill 10, which is the target of estimating the remaining life, will change the remaining life characteristic with respect to the operating time as in the characteristic B in the future, and will reach the life reaching time Tb. By referring to the transition characteristic E with respect to the database up to the past or the present in this way, the future remaining life transition can be predicted in consideration of the operating state of the mill 10, so that the remaining life can be estimated more accurately. It becomes possible to do. The transition characteristic E of the estimation result of the remaining life performed on the mill 10 for which the remaining life is estimated may be the transition characteristic from the time of completion to the present, or may be the transition characteristic from the present to the past predetermined period. Alternatively, a period during which the operating state has changed significantly (for example, the type of solid fuel has changed) may be selected and used as the transition characteristic.

It should be noted that, as in the example of FIG. 13, the transition characteristic of the estimation result of the remaining life performed on the mill 10 to be estimated for the remaining life and the selected transition characteristic of the remaining life do not completely correspond to each other. However, similar transition characteristics may be selected from the selected remaining life transition characteristics. In addition, when there is no transition characteristic similar to the transition characteristic of the estimation result of the remaining life performed for the mill 10 whose remaining life is to be estimated among the selected remaining life transition characteristics in the database up to the past or present. May make a prediction based on the selected remaining life transition characteristics. For example, in FIG. 13, the transition characteristic of the estimation result of the remaining life with respect to the mill 10 for which the remaining life is estimated is the ratio of the difference between the characteristic A side and the characteristic B side between the characteristic A and the characteristic B. If it is located, the future remaining life transition of the mill 10 whose remaining life is estimated may be predicted based on the characteristic A and the characteristic B. In this case, for example, the intermediate line between the characteristic A and the characteristic B is generated on the assumption that the ratio of the difference between the characteristic A side and the difference between the characteristic B side is continued, and the remaining life transition is predicted. But it may be.

It should be noted that the processing by the prediction unit 65 (selection of a similar operating state in the database and the transition characteristics of the estimation result of the remaining life for the mill 10 which is the target of the estimation of the remaining life in the selected remaining life transition characteristics are similar. Selection of remaining life transition characteristics with transition characteristics and prediction of future remaining life transition based on the selected remaining life transition characteristics) may be processed by a preset algorithm or appropriately processed using AI. You may do it.

As described above, according to the wear evaluation system and the solid fuel crusher according to the present embodiment, the wear evaluation method, and the wear evaluation program, it is based on a database in which the operating state and the remaining life transition characteristics are associated with each other. Therefore, the future transition of the remaining life can be predicted by selecting the remaining life transition characteristic having the transition characteristic similar to the transition characteristic of the transition result of the remaining life estimated by the evaluation unit 64. It is possible to predict the transition of the remaining life in the future more accurately, and it is possible to carry out maintenance (repair, replacement, etc.) at a more appropriate timing. That is, since the roller 13 and the table liner 12a can be used for a longer period of time, the maintenance frequency of the mill 10 can be reduced. Therefore, the maintenance cost can be reduced. In addition, the operating rates of the mill 10 and the power plant 1 can be improved.

[Third Embodiment]
Next, the wear evaluation system and the solid fuel crusher according to the third embodiment of the present disclosure, the wear evaluation method, and the wear evaluation program will be described.
In this embodiment, a maintenance plan is created based on the estimated remaining life. Hereinafter, the wear evaluation system, the solid fuel crusher, the wear evaluation method, and the wear evaluation program according to the present embodiment will be mainly described with respect to the differences from the first embodiment and the second embodiment.

As shown in FIG. 14, the control unit 60 in the present embodiment further includes a planning unit 66.
The planning unit 66 performs a maintenance plan based on the estimated remaining life transition characteristic. Specifically, from the remaining life estimated by the evaluation unit 64 and the remaining life estimated by the prediction unit 65, it is determined at what time in the future the life will be completely consumed, and the planning unit 66 performs the maintenance plan. .. Since the remaining life can be estimated more accurately as described above, it is appropriate at a more appropriate time before the life is completely consumed, rather than the conventional maintenance time such as replacement with a margin. It is possible to make an efficient maintenance plan with a margin.

The planning unit 66 performs a maintenance plan before a predetermined period, for example, with respect to the estimated life arrival time. The predetermined period is a predetermined period based on the period required for performing maintenance in a safe and efficient process, for example, setting the period from the arrangement of the roller 13 and the table liner 12a for maintenance to the time required for replacement as the predetermined period. Is set. In the maintenance plan, for example, in addition to the maintenance content and the maintenance time, the operation plan for adjusting the maintenance time and at least one of the load sharing adjustments in the plurality of mills 10 are included in the plan.

The maintenance time is an appropriate time (recommended time) for replacing or repairing the rollers 13 and the table liner 12a, which are set based on the estimated remaining life transition characteristics. The maintenance time is set in consideration of a predetermined appropriate margin that does not become excessive with respect to the estimated life arrival time, for example.

The operation plan for adjusting the maintenance time is an operation plan for the mill 10, and is for adjusting the time until the maintenance time. For example, if the maintenance period has already been set by the user and is set later than the estimated life end time, an operation plan for extending the life is planned. Specifically, the type of solid fuel is changed, the degree of fineness of pulverization into solid fuel is relaxed, and the like. By appropriately changing the operating state, it is possible to extend the life of the part to be replaced of the mill 10 in a safer and more efficient process, and to perform maintenance at an appropriate time. If the preset maintenance period is set before the estimated lifespan, the load of the mill 10 (the amount of solid fuel to be crushed) is set so that the remaining lifespan is not increased. , Mill capacity load factor) may be planned to effectively utilize the remaining life.

The load sharing adjustment in the plurality of mills 10 is to appropriately adjust the load sharing among the plurality of mills 10 provided in the power generation plant 1. For example, the load sharing of each mill 10 is adjusted in order to match the maintenance time of the mills 10 in a plurality of units or to set the time stepwise (for example, the maintenance interval is set to be equal in the plurality of mills 10). To plan. For example, with respect to the plan of the required amount of pulverized fuel that can be supplied as the solid fuel crusher 100, the expected life arrival time for one of the plurality of mills 10 is compared with that of the other mills 10. If it is too early, the load of the mill 10 (mill capacity load factor) is reduced to delay the end of life, and the load of other mills 10 (mill capacity load factor) is increased to bear the end of life. It is possible to systematically carry out maintenance to stop the plurality of mills 10 at the same time by accelerating the time and adjusting the time when the life of the plurality of mills 10 reaches the end of the life.

FIG. 15 is an example of a system related to a maintenance plan. As shown in FIG. 15, on the user side, the remaining life estimation information of the mill 10 is aggregated in the information aggregation system 101, and the server 102 on the device manufacturer side acquires the information aggregated in the aggregation system and plans the system 103. Make a maintenance plan and make a proposal to the user. Further, as the maintenance plan, a plurality of maintenance plans for a plurality of patterns may be performed and a proposal may be made to the user. The maintenance plan is a maintenance plan that combines the number and timing of the mills 10 for stopping and performing maintenance for a plurality of mills 10 and the operation plan of the mills 10 up to the maintenance. The user can select from a plurality of maintenance plans while comparing the most suitable maintenance implementation time of the solid fuel crusher 100 with respect to the operation plan of the power plant 1. Although FIG. 15 illustrates a case where the planning unit 66 is provided as the planning system 103 on the device manufacturer side, it may be provided on the solid fuel crushing device side of the user. Further, the information aggregation system 101 may be provided on the device manufacturer side.

As described above, according to the wear evaluation system and the solid fuel crusher according to the present embodiment, the wear evaluation method, and the wear evaluation program, maintenance is set by performing a maintenance plan based on the estimated remaining life. Since there are multiple plan options for the timing, you can make a plan with plenty of time. Therefore, the operating rates of the mill 10 and the power plant 1 can be improved.

The present disclosure 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. That is, the above-mentioned first embodiment, second embodiment, and third embodiment can be combined with each other.

The wear evaluation system, the solid fuel crusher, the wear evaluation method, and the wear evaluation program described in each of the above-described embodiments are grasped as follows, for example.
The wear evaluation system according to the present disclosure is a wear evaluation system of a solid fuel crusher (100) that crushes solid fuel in a crushing unit (10), and measures a measured value regarding an operating state in the solid fuel crusher (100). Correspondence information in which the operating state and the wear resistance evaluation information of the crushing unit (10) are associated with each of the acquisition unit (62) to be acquired and the plurality of classes set according to the type of solid fuel. Based on the specific unit (63) that specifies the wear resistance evaluation information corresponding to the measured value, and the evaluation unit (10) that performs wear evaluation in the crushing unit (10) based on the specified wear resistance evaluation information. 64) and.

According to the wear evaluation system according to the present disclosure, classes are set according to the type of solid fuel, and in each class, the operating state of the solid fuel crusher (100) and the wear resistance of the crushing unit (10). Since the evaluation information is associated in advance, the wear resistance evaluation information corresponding to the operating state can be easily specified from the acquired measured values related to the operating state. That is, it is possible to specify wear resistance evaluation information according to the type of solid fuel according to the operating state, and based on the wear resistance evaluation information, wear evaluation of the crushed portion (10) caused by crushing the solid fuel. It can be performed. The wear resistance evaluation information is, for example, information on the value of the wear resistance evaluation factor for evaluating the wear state of the crushed portion (10) by crushing the solid fuel.

Since the wear is evaluated based on the measured values related to the operating state, the evaluation can be performed without stopping the solid fuel crusher (100). That is, it is possible to continue the operation of the solid fuel crusher (100) in a stable manner, and it is possible to improve the operating rate. In addition, since wear resistance evaluation information is specified by the measured values related to the operating condition, it is necessary to reduce the labor involved in selecting the wear resistance evaluation information and suppress human errors in selecting the wear resistance evaluation information to perform accurate wear evaluation. Is possible.

Since the wear evaluation can be performed according to the class, the wear evaluation can be performed according to each solid fuel type (property) even when the operation is performed by switching the solid fuel type. That is, when the wear amount and the remaining life of the crushed portion are estimated as the wear evaluation, the evaluation accuracy can be further improved. Since the evaluation can be performed more accurately, the maintenance time and frequency can be set more appropriately. That is, the crushed portion (10) can be used for a longer period of time. By enabling highly reliable wear evaluation, it is possible to estimate the amount of wear and the remaining life of the crushed portion with high accuracy as wear evaluation. As a result, maintenance can be performed efficiently at a more appropriate time for maintenance such as replacement with a margin, and maintenance costs can be reduced, parts can be replaced, and waste generation due to maintenance work can be suppressed. Can be done.

In the wear evaluation system according to the present disclosure, the operating state may be a load state in the solid fuel crushing device (100).

According to the wear evaluation system according to the present disclosure, by using the load state in the solid fuel crusher (100) as the operating state, it is possible to more effectively associate the wear evaluation information with the wear evaluation information.

In the wear evaluation system according to the present disclosure, the operating state includes the power index of the crushing unit (10), the load index of the crushing unit (10), and the gas flowing into the crushing unit (10) and the crushing unit. It may include at least one of the pressure differential with the gas discharged from (10).

According to the wear evaluation system according to the present disclosure, the load state of the operating state includes the power index of the crushing unit (10), the load index of the crushing unit (10), and the gas flowing into the crushing unit (10) and the crushing unit. By using at least one of the differential pressures with the gas discharged from (10), the solid fuel crusher (100) is stopped and opened to operate while operating without measuring the actual amount of wear. It is possible to more effectively perform wear evaluation by associating it with wear resistance evaluation information by reflecting changes in the state and midway changes of the solid fuel actually used.

In the wear evaluation system according to the present disclosure, the operating state may include at least one of the amount of coal supplied to the solid fuel and the moisture information of the solid fuel.

According to the wear evaluation system according to the present disclosure, the operating state can be estimated more accurately and the appropriate wear resistance evaluation information can be specified more accurately by using the coal supply amount of the solid fuel and the water content information of the solid fuel. It becomes possible to perform wear evaluation more accurately.

In the wear evaluation system according to the present disclosure, the number of the class may be smaller than the number of types of solid fuel in the corresponding information.

According to the wear evaluation system according to the present disclosure, since the number of the above-mentioned classes is smaller than the number of types of solid fuel, it is possible to efficiently evaluate the wear. For example, compared with the case where the coal type is individually discriminated for all types of solid fuel to be used and the wear resistance evaluation information is associated with each wear resistance evaluation information, the processing is performed. Complicity can be suppressed.

In the wear evaluation system according to the present disclosure, in the corresponding information, each of the classes may be set according to the degree of similarity regarding the wear resistance of each solid fuel to the crushed portion (10).

According to the wear evaluation system according to the present disclosure, by setting the class of the corresponding information according to the similarity regarding the wear resistance of each solid fuel to the crushed portion (10), the correspondence with the wear resistance evaluation information can be more appropriately performed. , Wear evaluation can be performed more accurately.

In the wear evaluation system according to the present disclosure, in the corresponding information, each of the classes may be set according to the hardgrove grindability index of each solid fuel.

According to the wear evaluation system according to the present disclosure, by setting the class of the corresponding information according to the Hardgrove Grindability Index (HGI) of the solid fuel, the correspondence with the wear evaluation information can be more appropriately performed and more accurately. Wear evaluation can be performed.

In the wear evaluation system according to the present disclosure, the evaluation unit (64) is based on a wear ratio which is a ratio of the amount of wear between the rollers (13) and the table (12a) constituting the crushing unit (10). Wear evaluation may be performed on each of the roller (13) and the table (12a).

According to the wear evaluation system according to the present disclosure, the amount of wear of the rollers (13) and the table (12a) constituting the crushing unit (10) is grasped in advance based on the amount of wear measured during the past open maintenance. Based on the wear ratio, which is the ratio of, it is possible to evaluate each of the roller (13) and the table (12a) individually. That is, it becomes possible to perform a more detailed wear evaluation.

In the wear evaluation system according to the present disclosure, the evaluation unit (64) estimates the wear rate based on the wear resistance evaluation information, and evaluates the wear amount of the crushed unit (10) based on the wear rate. May be.

According to the wear evaluation system according to the present disclosure, it is possible to more accurately evaluate the amount of wear of the crushed portion corresponding to the properties of the solid fuel by performing the wear rate based on the wear resistance evaluation information.

In the wear evaluation system according to the present disclosure, the evaluation unit (64) may evaluate the remaining life of the crushing unit (10) based on the wear resistance evaluation information.

According to the wear evaluation system according to the present disclosure, it is possible to more accurately evaluate the remaining life corresponding to the properties of the solid fuel based on the wear resistance evaluation information. Since highly reliable wear evaluation is possible, the remaining life can be estimated with high accuracy. As a result, it is possible to efficiently perform maintenance at a more appropriate time for maintenance such as replacement with a margin.

The wear evaluation system according to the present disclosure evaluates the remaining life based on a database in which the operating state data of the solid fuel crusher (100) and the remaining life transition characteristics corresponding to the operating state data are accumulated in advance. It is also possible to provide a prediction unit (65) for predicting the transition of the remaining life in the future from the transition of the result.

According to the wear evaluation system according to the present disclosure, the future transition of the remaining life is predicted from the transition of the evaluation result of the remaining life based on the database in which the operating condition data and the remaining life transition characteristic are associated with each other. Can be done. It is possible to predict the transition of the remaining life in the future more accurately, and it is possible to carry out maintenance (replacement, etc.) at a more appropriate timing. That is, since the crushed portion (10) can be used for a longer time, the maintenance frequency can be reduced. Therefore, the maintenance cost can be reduced. In addition, the operating rate can be improved.

In the wear evaluation system according to the present disclosure, the operating state data includes the type of solid fuel, the amount of solid fuel supplied, the load applied for crushing, and the number of revolutions of the classifier provided in the crushing unit (10). Assuming that at least one of the differential pressure between the gas flowing into the crushing section (10) and the gas discharged from the crushing section (10), the power of the crushing section (10), and the operating time is included. May be good.

According to the wear evaluation system according to the present disclosure, the type of solid fuel, the amount of solid fuel supplied, the load applied for crushing, the number of revolutions of the classifier provided in the crushing section (10), and the crushing section (10). The differential pressure between the gas flowing into the inside and the gas discharged from the crushing section (10), the power of the crushing section (10), and the operating time are factors that affect the remaining life. Therefore, as the operation state data, the type of solid fuel, the amount of solid fuel supplied, the load applied for crushing, the number of revolutions of the classifier provided in the crushing section (10), and the inflow into the crushing section (10). By using at least one of the differential pressure between the gas to be crushed and the gas discharged from the crushing section (10), the power of the crushing section (10), and the operating time, the transition of the remaining life in the future can be effectively changed. Can be predicted.

The wear evaluation system according to the present disclosure may include a planning unit (66) that performs maintenance planning based on the estimated remaining life of the crushing unit (10).

According to the wear evaluation system according to the present disclosure, by creating a maintenance plan based on the estimated remaining life, it is possible to make a plan with a margin in the maintenance time. It is also possible to propose multiple maintenance plans. Therefore, it is possible to select an appropriate maintenance plan and improve the operating rate. In the maintenance plan, for example, maintenance time, an operation plan for adjusting the maintenance time (for example, changing the coal type, etc.), load sharing adjustment in a plurality of crushing parts (10), and the like can be performed.

The solid fuel crushing apparatus (100) according to the present disclosure includes a table (12a), a roller (13) for crushing solid fuel between the table (12a), and the wear evaluation system described above.

The wear evaluation method according to the present disclosure is a wear evaluation method of a solid fuel crusher (100) that crushes a solid fuel in a crushing unit (10), and measures a measured value regarding an operating state in the solid fuel crusher (100). In each of the acquisition process and the plurality of classes set according to the type of solid fuel, the operation state and the wear resistance evaluation information of the crushed portion (10) are associated with each other based on the corresponding information. It has a step of specifying the wear resistance evaluation information corresponding to the measured value, and a step of performing wear evaluation in the crushed portion (10) based on the specified wear resistance evaluation information.

The wear evaluation program according to the present disclosure is a wear evaluation program of the solid fuel crusher (100) that crushes the solid fuel in the crushing unit (10), and measures the operating state of the solid fuel crusher (100). In each of the acquired process and the plurality of classes set according to the type of solid fuel, the operation state and the wear resistance evaluation information of the crushed portion (10) are associated with each other, based on the corresponding information. A computer is made to execute a process of specifying the wear resistance evaluation information corresponding to the measured value and a process of performing wear evaluation in the crushing unit (10) based on the specified wear resistance evaluation information.

1: Power plant 10: Mill (crushing part)
11: Housing 12: Rotating table 12a: Table liner 13: Roller 14: Drive unit 14a: Mill motor 16: Rotary classifier 16a: Blade 17: Fuel supply unit 18: Classifier motor 19: Outlet 20: Coal feeder 21: Bunker 22: Conveying unit 23: Coal feeder motor 24: Down spout unit 30: Blower unit 30a: Hot gas flow path 30b: Cold gas flow path 30c: Hot gas damper 30d: Cold gas damper 31: Primary air ventilator 32: Pushing air Ventilator 34: Heat exchanger 40: State detector 41: Bottom surface 42: Ceiling 45: Journal head 47: Support arm 48: Support shaft 49: Pressing device 51: Hub 52: Support shaft 53: Intermediate piston 54: Hydraulic Load part 55: Roller support part 56: Main body 57: Protrusion part 58: Stopper 60: Control part (wear evaluation system)
62: Acquisition unit 63: Specific unit 64: Evaluation unit 65: Prediction unit 66: Planning unit 100: Solid fuel crusher 100a: Primary air flow path 100b: Supply flow path 101: Information aggregation system 102: Server 103: Planning system 110 : CPU
120: ROM
130: RAM
140: HDD
150: Communication unit 180: Bus 200: Boiler 210: Furnace 220: Burner unit

Claims (16)

A wear evaluation system for a solid fuel crusher that crushes solid fuel in the crushing section.
An acquisition unit that acquires measured values related to the operating state of the solid fuel crusher, and
In each of the plurality of classes set according to the type of solid fuel, the wear resistance corresponding to the measured value is based on the corresponding information in which the operating state and the wear resistance evaluation information of the crushed portion are associated with each other. A specific part that identifies evaluation information and
Based on the specified wear resistance evaluation information, an evaluation unit that evaluates wear in the crushed unit and an evaluation unit
Wear assessment system with. The wear evaluation system according to claim 1, wherein the operating state is a load state in the solid fuel crusher. The operating state includes at least one of a power index of the crushing section, a load index of the crushing section, and a differential pressure between a gas flowing into the crushing section and a gas discharged from the crushing section. The wear evaluation system according to 1 or 2. The wear evaluation system according to claim 3, wherein the operating state includes at least one of a solid fuel supply amount and a solid fuel moisture information. The wear evaluation system according to any one of claims 1 to 4, wherein the number of the class is smaller than the number of types of solid fuel in the corresponding information. The wear evaluation system according to any one of claims 1 to 5, wherein in the corresponding information, each class is set according to the similarity in terms of wear resistance of each solid fuel to the crushed portion. The wear assessment system according to claim 6, wherein in the corresponding information, each said class is set according to the Hardgrove Grindability Index of each solid fuel. Any one of claims 1 to 7, wherein the evaluation unit evaluates wear on each of the roller and the table based on a wear ratio which is a ratio of the amount of wear between the roller and the table constituting the crushing unit. The wear evaluation system according to item 1. The wear evaluation system according to any one of claims 1 to 8, wherein the evaluation unit estimates the wear rate based on the wear property evaluation information and evaluates the wear amount of the crushed part based on the wear rate. .. The wear evaluation system according to any one of claims 1 to 9, wherein the evaluation unit evaluates the remaining life of the crushed unit based on the wear resistance evaluation information. Based on the database in which the operating state data of the solid fuel crusher and the remaining life transition characteristics corresponding to the operating state data are accumulated in advance, the transition of the future remaining life is determined from the transition of the result of evaluating the remaining life. The wear evaluation system according to claim 10, further comprising a prediction unit for prediction. The operating state data is obtained from the type of solid fuel, the amount of solid fuel supplied, the load applied for crushing, the number of revolutions of the classifier provided in the crushing section, the gas flowing into the crushing section, and the crushing section. The wear evaluation system according to claim 11, further comprising at least one of the differential pressure with the discharged gas, the power of the crushed portion, and the operating time. The wear evaluation system according to any one of claims 9 to 12, further comprising a planning unit that performs maintenance planning based on the estimated remaining life of the crushed unit. With a table
A roller that grinds solid fuel between the table and
The wear evaluation system according to any one of claims 1 to 13.
A solid fuel crusher equipped with. This is a wear evaluation method for a solid fuel crusher that crushes solid fuel in the crushing section.
The process of acquiring the measured values related to the operating state of the solid fuel crusher, and
In each of the plurality of classes set according to the type of solid fuel, the wear resistance corresponding to the measured value is based on the corresponding information in which the operating state and the wear resistance evaluation information of the crushed portion are associated with each other. The process of identifying evaluation information and
A step of performing wear evaluation in the crushed portion based on the specified wear resistance evaluation information, and
Wear evaluation method with. A wear evaluation program for a solid fuel crusher that crushes solid fuel in the crushing section.
The process of acquiring the measured values related to the operating state of the solid fuel crusher, and
In each of the plurality of classes set according to the type of solid fuel, the wear resistance corresponding to the measured value is based on the corresponding information in which the operating state and the wear resistance evaluation information of the crushed portion are associated with each other. Processing to identify evaluation information and
Based on the specified wear resistance evaluation information, the process of performing wear evaluation in the crushed portion and the process of performing wear evaluation.
A wear assessment program to get your computer to run.

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