WO2021065373A1

WO2021065373A1 - Remaining life estimation system solid fuel crushing device, remaining life estimation method, and remaining life estimation program

Info

Publication number: WO2021065373A1
Application number: PCT/JP2020/033893
Authority: WO
Inventors: 聡太朗山口; 優也植田; 小林　浩幸
Original assignee: 三菱パワー株式会社
Priority date: 2019-09-30
Filing date: 2020-09-08
Publication date: 2021-04-08
Also published as: JP6828113B1; JP2021053590A

Abstract

The purpose of the present invention to provide a remaining life estimation system capable of more accurately estimating remaining life, a solid fuel crushing device, a remaining life estimation method, and a remaining life estimation program. This system estimates the remaining life of a journal bearing of a roller (13) that grinds solid fuel between the roller and a rotating table (12), wherein the system comprises: an acquisition unit that acquires a measured value of a hydraulic load as information pertaining to a load applied to the roller (13), and a measured value of a lift amount of the roller (13) as information pertaining to the angle of inclination of the roller (13) relative to the rotating table (12); and an estimation unit that estimates the remaining life of the journal bearing on the basis of the information acquired in the acquisition unit.

Description

Remaining life estimation system and solid fuel crusher, remaining life estimation method, and remaining life estimation program

The present disclosure relates to a remaining life estimation system and a solid fuel crusher, a remaining life estimation method, and a remaining life estimation program.

Conventionally, solid fuel (carbon-containing solid fuel) such as coal and 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 in a predetermined particle size range, transported to a boiler, and burned by a combustion device. .. 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.

When crushing solid fuel, a load is applied to the rollers, so a load is also applied to the journal bearings of the rollers, which shortens the durable life. Therefore, it is necessary to grasp the remaining life of the journal bearing of the roller and perform maintenance at an appropriate time.

Patent Document 1 discloses that the hydraulic load is measured, the roller load fluctuation is calculated, and the replacement time is predicted based on the fatigue damage degree calculated by the roller load fluctuation.

Japanese Unexamined Patent Publication No. 2000-246126

However, in the conventional remaining life estimation method, the remaining life is estimated by using a design value according to the maximum load (for example, the maximum coal supply amount) applied to the journal bearing of the roller as a fixed value. Therefore, although the operating load of the mill fluctuates in response to the load fluctuation in the power plant, the fluctuation of the journal bearing load is not reflected in the estimated remaining life. In addition to the replacement time predicted from the remaining life estimated using the design value according to the maximum load, it is often the case that a replacement time with a margin period is actually selected, so the maintenance frequency that is originally required. There is a risk that the maintenance frequency will increase compared to.

Although Patent Document 1 discloses that a hydraulic load is measured, it is not possible to accurately grasp the distribution of the load in the radial direction and the axial direction with respect to the journal bearing only by measuring the hydraulic load, and when estimating the remaining life. It may not be possible to effectively reflect fluctuations in the load value.

The present disclosure has been made in view of such circumstances, and is a remaining life estimation system and a solid fuel crusher capable of estimating the remaining life of roller journal bearings more accurately, and a remaining life estimation method. , As well as to provide a remaining life estimation program.

The first aspect of the present disclosure is a system for estimating the remaining life of a journal bearing of a roller that crushes solid fuel with and from a table, in which a measured value of information regarding a load applied to the roller and an inclination of the roller with respect to the table. It is a remaining life estimation system including an acquisition unit that acquires a measured value of information about an angle and an estimation unit that estimates the remaining life of the journal bearing based on the information acquired by the acquisition unit.

A second aspect of the present disclosure is a method for estimating the remaining life of a journal bearing of a roller that crushes solid fuel with and from a table, in which a measured value of information regarding a load applied to the roller and an inclination of the roller with respect to the table are used. This is a remaining life estimation method including an acquisition step of acquiring a measured value of information about an angle and an estimation step of estimating the remaining life of the journal bearing based on the information acquired in the acquisition step.

A third aspect of the present disclosure is a program for estimating the remaining life of a journal bearing of a roller that crushes solid fuel with and from a table, in which a measured value of information regarding a load applied to the roller and a distance of the roller to the table are used. The remaining life for causing the computer to execute the acquisition process for acquiring the measured value of the information regarding the lift amount, and the estimation process for estimating the remaining life of the journal bearing based on the information acquired in the acquisition process. It is an estimation program.

According to the present disclosure, the effect is that the remaining life of the journal bearing of the roller can be estimated 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 partially enlarged vertical sectional view which shows the load state of the roller which concerns on 1st Embodiment of this disclosure. It is a partially enlarged vertical sectional view which shows the roller inclination angle which concerns on 1st Embodiment of this disclosure. It is a partially enlarged vertical sectional view which shows the roller inclination angle which concerns on 1st Embodiment of this disclosure. It is a figure which shows the structural example of the gap sensor which concerns on 1st Embodiment of this disclosure. It is a figure which showed the flowchart of the remaining life estimation process which concerns on 1st Embodiment of this disclosure. It is a figure which shows the estimation result of the remaining life 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 remaining life estimation system and the solid fuel crusher according to the present disclosure, the remaining life estimation method, and the first embodiment of the remaining life estimation program will be described with reference to the drawings. In this embodiment, the case where the remaining life 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" indicates the direction of the vertically upper side, and "upper" such as the upper part and the upper surface indicates the vertically upper part. Similarly, "bottom" refers to the vertically lower part.

The mill 10 for crushing solid fuel such as coal or biomass fuel supplied to the boiler 200 into pulverized fuel which is a pulverized solid fuel may be in the form of crushing only coal or crushing 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 global warming gas, and its use is being studied in various ways.

The mill 10 rotationally drives the housing 11, the rotary table (table) 12, the roller (crushing roller) 13, the drive unit 14, the rotary classifier 16, the fuel supply unit 17, and the rotary classifier 16. It is provided with a motor 18 for making the 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 along the vertical direction at the center position of the housing 11, and the lower end portion extends to the inside of the housing 11. ing.

A drive unit 14 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.

When the solid fuel is charged from the fuel supply unit 17 toward the center 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 between the solid fuel and the roller 13. It is sandwiched 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 onto the rotary table 12 without reaching the rotary classifier 16. It is returned and crushed again.

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. To. 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 upper surface of the rotary table 12, the roller 13 receives a 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 and crushed to become fine fuel.

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. 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 roller 13 against the rotary table 12.

An example of the detailed configuration of the roller 13 is shown in FIG. 2 (partially enlarged vertical sectional view showing the circumference 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. As will be described later, in this embodiment, the remaining life of the journal bearing 59 is estimated. 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 (lift amount X) of the roller 13 to the rotary table 12 changes by rotating around the support shaft 48.

A pressing device 49 for pressing 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 L1 (see FIG. 5) 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 to a certain position around the support shaft 48. 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 (rotation axis). The drive unit 14 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. In the rotary classifier 16, the solid fuel crushed by the roller 13 is larger than a predetermined particle size (for example, 70 to 100 μm for coal) (hereinafter, the crushed solid fuel exceeding the predetermined particle size is referred to as “crude fuel”. It is a device that classifies fuels 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 motor 18 controlled by a control unit 60 to provide a cylindrical shaft (not shown) extending in the vertical direction of the housing 11. It rotates around the fuel supply unit 17 in the center.

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 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 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 biomass fuel chips and pellets before crushing have a constant particle size (the size of the pellets) as compared with coal fuel (that is, the particle size of 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 biomass fuels and the mill. 10 The internal pressure may drop. When the primary air blows into the storage part of the bunker 21, the transportability of the biomass fuel deteriorates and dust is generated, the bunker 21 and the down spout part 24 are ignited, and when the pressure inside the mill 10 drops, the pulverized fuel is transported. Various problems may occur in the operation of the mill 10, such as a decrease in the amount. Therefore, a rotary valve (not shown) may be provided in the middle of the fuel supply unit 17 from the coal feeder 20 to suppress the backflow due to the blow-up of the primary air and the pulverized fuel.

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 cooling unit 30 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 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.
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 through a gas recirculation ventilator (not shown) to form an air-fuel mixture, which flows in from the primary air flow path 100a. The oxygen concentration of the primary air may be adjusted.

In the present embodiment, the state detection unit 40 of the housing 11 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. For example, depending on the classification performance of the rotary classifier 16, the increase / decrease in the circulation amount of the crushed solid fuel that circulates inside the mill 10 between the vicinity of the rotary classifier 16 and the vicinity of the rotary table 12 and the difference in the mill 10 with respect to this. The increase and decrease of pressure changes. That is, it is possible to adjust and manage the pulverized fuel discharged from the outlet 19 with respect to the solid fuel supplied to the inside of the mill 10. Therefore, a large amount of pulverized fuel can be supplied to the burner portion 220 provided in the boiler 200 within a range in which the particle size of the pulverized fuel does not affect the combustibility of the burner portion 220.
The state detection unit 40 of the present embodiment is, for example, a temperature measuring means, and the temperature of the primary air supplied to the inside of the housing 11 for blowing the solid fuel crushed by the rollers 13 to the rotary classifier 16 and the housing. The temperature of the primary air up to the outlet 19 is detected inside the 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 pulverized 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 80 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 fireplace 210 and a burner portion 220.

The burner unit 220 heats the primary air containing the fine fuel supplied from the supply flow path 100b and the air (outside air) sent from the forced air ventilator (FDF: Feed Draft Fan) 32 with 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 a heat exchanger (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 precipitator, etc.), and is sent from the primary air ventilator 31 by a heat exchanger 34 such as an air preheater, for example. The heat is exchanged between the air and the air sent from the forced air blower 32, and is guided to the chimney (not shown) via the induced blower (IDF) 33 and discharged to the outside air. To. 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 by an economizer (not shown) and then further heated by an evaporator (not shown) and a superheater (not shown) to generate high-temperature and high-pressure steam to generate electricity. It is sent to a steam turbine (not shown), which is a unit, to rotate drive the steam turbine, and a generator connected to the steam turbine (not shown) is driven to rotate to generate electricity, thereby forming a power 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 drive unit 14, for example. The control unit 60 adjusts the classification performance by transmitting a drive instruction to the motor 18 of the rotary classifier 16 to control the rotation speed, thereby optimizing the differential pressure in the mill 10 within a predetermined range. It is possible to stabilize the supply of pulverized fuel. The control unit 60 can adjust the amount of solid fuel supplied by the transport unit 22 to the fuel supply unit 17 by transmitting a drive instruction to the motor 23 of the coal feeder 20, for example. .. 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. 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 can be moved to the rotary table 12. It optimizes the pressing force and enables stable crushing of solid fuel.

The control unit 60 estimates the remaining life of the journal bearing 59. That is, the control unit 60 has a function as a remaining life estimation system of the journal bearing 59 of the roller 13 that crushes the solid fuel between the rotary table 12 and the rotary table 12. The function as the remaining life estimation system may be provided in a control device different from the control unit 60.

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.

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 may be installed in a ROM 120 or other storage medium in advance, provided in a state of being stored in a computer-readable storage medium, or distributed via a wired or wireless communication means. May be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like. The HDD 140 may be replaced with a solid state disk (SSD) or the like.

FIG. 4 is a functional block diagram showing the function related to the remaining life estimation included in the control unit 60. As shown in FIG. 4, the control unit 60 includes an acquisition unit 62 and an estimation unit 63.

The acquisition unit 62 acquires the measured value of the information regarding the load applied to the roller 13 and the measured value of the information regarding the inclination angle of the roller 13 with respect to the rotary table 12. In the acquisition unit 62, the measured value of the information on the load applied to the roller 13, which is important for reflecting the actual operating state in the estimation of the remaining life of the journal bearing 59, and the information on the inclination angle of the roller 13 with respect to the rotary table 12 are obtained. Have acquired.

As shown in FIG. 5, the information regarding the load applied to the roller 13 is the information regarding the load L2 received from the rotary table 12 in the roller 13. The load L2 from the rotary table 12 is a force (load) received from the rotary table 12 when the roller 13 is pressed against the solid fuel supplied to the upper surface of the rotary table 12 and crushed. That is, it is the force that the roller 13 receives in the direction perpendicular to the adjacent facing surfaces when the contact surface between the rotary table 12 and the roller 13 or the gap between the roller 13 and the rotary table 12 is set to the minimum. The load L2 from the rotary table 12 acts along the axis AX1 parallel to the rotary axis of the rotary table 12 (for example, in the direction of the rotary axis). The shape of the rotary table 12 in FIG. 5 is an example and is not limited to the shape.

In the present embodiment, as information regarding the load applied to the roller 13, the additional load in the pressing device 49 (the pressing force that presses the roller 13 toward the rotary table 12 via the solid fuel that crushes the roller 13), that is, the hydraulic load in the hydraulic load unit 54. The case of acquiring L1 will be described. The hydraulic load (additional load) L1 is a parameter controlled when the roller 13 is pressed against the rotary table 12, and the measured value is measured by the installed sensor and output to the acquisition unit 62. As the sensor, a pressure sensor such as a load cell or a pressure sensor can be used. The information regarding the load applied to the roller 13 can be applied without being limited to the hydraulic load (additional load) L1 as long as it is a parameter related to the load applied to the roller 13. For example, the load applied to the roller 13 or the load applied to the journal bearing 59 may be directly measured and acquired by the sensor.

The information regarding the tilt angle of the roller 13 with respect to the rotary table 12 is information regarding the roller tilt angle θ as shown in FIG. 6 (partially enlarged vertical cross-sectional view showing the roller tilt angle). The roller tilt angle θ is the tilt of the roller 13 with respect to the rotary table 12, and the axis in the rotation axis direction of the rotary table 12 (or the axis parallel to the rotation axis) AX1 and the axis perpendicular to the rotation axis AX2 of the roller 13 ( (Vertical surface) This is the angle formed by AX3.

In the present embodiment, the lift amount X of the roller 13 is used as the information regarding the inclination angle of the roller 13 with respect to the rotary table 12. The lift amount X of the roller 13 is the distance between the rotary table 12 and the roller 13. The lift amount X is a distance generated by the presence of solid fuel to be crushed between the rotary table 12 and the roller 13. Since the roller 13 rotates about the support shaft 48, the lift amount X is the distance between the rotary table 12 and the roller 13 when the roller 13 moves up and down with respect to the support shaft 48. In this embodiment, the lift amount X is acquired by a gap sensor as shown in FIG. 8, for example. The lift amount X may be a linear movement sensor, a capacitance distance sensor, a laser distance sensor, or the like. In FIG. 7, a measurement bar 71 and a gap sensor 72 are provided with respect to the support shaft 48. The measurement bar 71 rotates with the rotation of the support shaft 48 (rotation of the roller 13). The installation position of the gap sensor 72 is fixed, and the distance between the gap sensor 72 and the measurement bar 71 is measured. In FIGS. 7 and 8, the ratio of the distance L between the central axis (AX3) of the roller 13 and the support shaft 48 and the lift amount X, and the ratio between the length l of the measurement bar 71 in the gap sensor 72 and the gap value x. Are equal. Therefore, the lift amount X can be calculated from the gap sensor 72 by the following equation (1).

In the formula (1), L and l are design values, and x can be obtained from the gap sensor, so that the lift amount X can be calculated. The lift amount X may be calculated from the operating amount of the pressing device 49, for example, the moving amount of the intermediate piston 53, or if the lift amount X can be directly measured, the lift amount X may be measured. Good.

The acquisition unit 62 may acquire the lift amount X, or may acquire the gap value x, which is the output of the gap sensor. When the amount of movement of the roller 13 is limited by the protrusion 57 and the stopper 58 and a gap is provided between the roller 13 and the rotary table 12, the 0 (zero) point of the gap value x is set as the roller 13. It may be set as the point where the gap of the rotary table 12 is minimized, and similarly, the 0 (zero) point of the gap value x of the gap sensor 72 is set as the point where the distance between the gap sensor 72 and the measurement bar 71 is minimized. You may put it.

In the present embodiment, the lift amount X of the roller 13 is used as the information regarding the tilt angle of the roller 13 with respect to the rotary table 12, but the information regarding the roller tilt angle θ is not limited to the lift amount X of the roller 13. It is possible. The roller inclination angle θ may be directly measured and acquired by a sensor or the like. As will be described later, in the present embodiment, the roller inclination angle θ is calculated from the lift amount X of the roller 13, the thrust load Ls and the radial load Lr are calculated and used for estimating the remaining life. When the lift amount X is acquired, the thrust load Ls and the radial load Lr may be calculated and the remaining life may be estimated without the calculation of the roller inclination angle θ. In this case, the acquisition unit 62 acquires the measured value of the information regarding the load applied to the roller 13 and the measured value of the information regarding the lift amount X of the roller 13 with respect to the rotary table 12. The information regarding the lift amount X of the roller 13 with respect to the rotary table 12 can be used without being limited to the lift amount X as long as the information is related to the lift amount X.

The estimation unit 63 estimates the remaining life of the journal bearing 59 based on the information acquired by the acquisition unit 62. Specifically, the estimation unit 63 calculates the radial load Lr and the thrust load Ls applied to the journal bearing 59, and estimates the remaining life of the journal bearing 59 based on the radial load Lr and the thrust load Ls.

FIG. 5 is a view (partially enlarged vertical cross-sectional view) showing the relationship of each load around the roller 13. As shown in FIG. 5, since the roller 13 is pressed against the rotary table 12 by the hydraulic load L1, the load L2 from the rotary table 12 is applied to the roller 13. There may be solid fuel to be crushed between the roller 13 and the rotary table 12. The load L2 from the rotary table 12 is also applied to the journal bearing 59 via the roller 13. By decomposing the load L2 received by the journal bearing 59 into a radial component and a thrust component, the radial load Lr and the thrust load Ls of the journal bearing 59 can be calculated. The estimation unit 63 estimates the remaining life of the journal bearing 59 from the radial load Lr and the thrust load Ls. As a method for estimating the life of the journal bearing 59 using the radial load Lr and the thrust load Ls, a known method can be used.

Specifically, the hydraulic load L1 and the lift amount X acquired by the acquisition unit 62 are input to the estimation unit 63. The gap value x may be input to the estimation unit 63, and the lift amount X may be calculated by the above calculation. The estimation unit 63 calculates the load L2 received by the journal bearing 59 from the rotary table 12 based on the input hydraulic load L1. Since the roller 13 is pressed toward the rotary table 12 based on the hydraulic load L1 via the crushed solid fuel, the hydraulic load L1 and the load L2 from the rotary table 12 have a correlation. There is. Therefore, the estimation unit 63 can calculate the load L2 from the rotary table 12 from the hydraulic load L1. When the load L2 from the rotary table 12 can be directly acquired by the acquisition unit 62 by a measuring instrument using various sensors, the acquired load L2 from the rotary table 12 may be used. When calculating the load L2 from the hydraulic load L1, in addition to the hydraulic load L1, the load due to the own weight of the roller 13 and the member supporting the roller 13 may be added.

Then, the estimation unit 63 calculates the roller inclination angle θ based on the input lift amount X. The roller inclination angle θ is calculated by the following equation (2).

As shown in FIG. 6, in the equation (2), θ ₀ is the roller inclination reference angle, and when the lift amount X is 0 (zero) (that is, the roller 13 and the rotary table 12 are in contact with each other, or the roller 13 and the roller 13 are in contact with each other. It is a roller inclination angle θ (a state when the gap of the rotary table 12 is minimized). Then, Δθ is the amount of change in the roller inclination angle θ with respect to the roller inclination reference angle, and Δθ is the value of the inverse tangent function of the ratio of the lift amount X and the distance L. That is, when the lift amount X is small, the roller inclination angle θ becomes large, and when the lift amount X is large, the roller inclination angle θ becomes small.

In this way, when the load L2 and the roller inclination angle θ from the rotary table 12 are calculated in the estimation unit 63, the thrust load Ls and the radial load Lr are calculated as shown in the relationship of FIG. The thrust load Ls is calculated by multiplying the load from the rotary table 12 by sin (θ), and the radial load Lr is calculated by multiplying the load from the rotary table 12 by cos (θ).

In this way, the estimation unit 63 calculates the thrust load Ls and the radial load Lr applied to the journal bearing 59, and estimates the remaining life based on the thrust load Ls and the radial load Lr. As a method for estimating the remaining life, various methods can be applied as long as they are based on the thrust load Ls and the radial load Lr.

Next, an example of the remaining life estimation process by the control unit 60 described above will be described with reference to FIG. FIG. 9 is a flowchart showing an example of the procedure of the remaining life estimation process according to the present embodiment. The flow shown in FIG. 9 is executed when, for example, an operator or the like gives an instruction to start estimating the remaining life. The remaining life estimation process may be executed periodically even if there is no start instruction from the operator or the like.

First, the measured values of the hydraulic load L1 and the lift amount X are acquired (S101).

Next, the roller inclination angle θ is calculated based on the lift amount X (S102).

Next, the radial load Lr and the thrust load Ls loaded on the journal bearing 59 are calculated (S103).

Next, the remaining life of the journal bearing 59 is estimated using the radial load Lr and the thrust load Ls (S104). Regarding the estimation of the remaining life, it is possible to use information other than the radial load Lr and the thrust load Ls (for example, the design value of the journal bearing 59) depending on the estimation method.

Next, the effect of the above-mentioned remaining life estimation process will be described with reference to FIG. FIG. 10 shows changes in the power plant load and the load applied to the journal bearing with respect to the operating time, and changes in the remaining life with respect to the operating time. FIG. 10 shows, as a reference example, a case where the remaining life is estimated assuming that the maximum load continues to be applied as a design value.

In the reference example, assuming that the load of the power plant 1 is operated at the rated load (for example, 100% load), the load applied to the journal bearing 59 is maximized in proportion to the load of the power plant 1. Is assumed. Therefore, the remaining life decreases linearly with respect to the operating time, and it is estimated that the operating time T2 in FIG. 10 is the time when maintenance is required.

On the other hand, in the present embodiment, since the load related to the roller 13 is sequentially measured as the hydraulic load L1, the load applied to the journal bearing 59 corresponding to the actual operating state of the power plant 1 can be acquired. .. As shown in the load (line graph) applied to the actual journal bearing 59 in FIG. 10, it may be lower than the maximum load. Therefore, it is a reference when estimating the remaining life in consideration of the measured value of the roller inclination angle θ. Compared with the example, the reduction of the remaining life with respect to the operating time becomes slower. In particular, in the period Ta of FIG. 10, since the load applied to the journal bearing 59 is low, the remaining life consumption is reduced. Since the period Ta changes according to the operating state, it is not limited to the period shown in FIG.

For example, assuming that the current point is the operating time T1 in FIG. 10, it is possible to estimate the operating time T3 as the time when maintenance is required by linearly extending the transition of the remaining life in the past predetermined period from the present. ..

According to the remaining life estimation of the present embodiment, it is possible to estimate the remaining life of the journal bearing 59 with higher accuracy according to the actual operating state. Therefore, a more accurate maintenance required time can be estimated as compared with the reference example (operating time is T2 <T3), and the mill 10 can be operated more efficiently.

In the present embodiment, the remaining life is estimated by using the measured values of the hydraulic load L1 and the lift amount X, but the remaining life is also estimated by using the measured values of the rotation speed of the journal bearing 59 (rotation speed of the roller 13). It may be estimated. In this case, the acquisition unit 62 acquires the actually measured value of the information on the rotation speed of the journal bearing 59, and the estimation unit 63 estimates the remaining life by taking into account the actually measured value of the information on the rotation speed of the journal bearing 59. .. For example, when the roller 13 slips with respect to the crushed solid fuel on the rotary table 12, the rotation speed of the journal bearing 59 may decrease or stop. Therefore, a rotation speed sensor that detects the actual rotation speed of the journal bearing 59 may be installed and the actual measured value of the rotation speed may be added when estimating the remaining life. By considering the measured value of the rotation speed of the journal bearing 59, the estimation accuracy can be further improved as compared with the case where the remaining life is estimated assuming that the rotation speed of the journal bearing 59 is constant. As the sensor, for example, in addition to a rotation position sensor such as a rotary encoder, a rotation speed sensor, an acceleration sensor that captures a change in the direction of gravity or a centrifugal force may be used. As a method of transmitting the measured information to the outside of the mill 10, it may be transmitted by a wired communication means, or may be transmitted by using some wireless communication means.

In the present embodiment, the remaining life is estimated by using the measured values of the hydraulic load L1 and the lift amount X, but the remaining life may be estimated by also using the state of the lubricant of the journal bearing 59. In this case, the acquisition unit 62 acquires the actually measured value of the information on the state of the lubricant of the journal bearing 59, and the estimation unit 63 also takes into account the actually measured value of the information on the state of the lubricant of the journal bearing 59. Estimate life. For example, when fine powder particles of crushed solid fuel are mixed in the lubricating oil in the journal bearing 59 box of the roller 13, the life of the journal bearing 59 may be extremely shortened. Therefore, as the state of the lubricant, for example, a sensor for detecting the state of the lubricating oil (contamination, deterioration, etc.) is installed in the journal bearing 59 box, and the influence from the state of the lubricating oil is taken into consideration when estimating the remaining life. You may. By taking into account the state of the lubricant, the accuracy of estimating the remaining life can be further improved. Most of the causes of lubricant contamination are contamination due to the intrusion of fine particles of crushed solid fuel from the seal portion (oil seal portion) of the roller 13. Since the cause of the invasion of fine particles is often due to insufficient seal air pressure in the seal portion, a sensor that detects changes in seal air pressure is installed to determine the effect of insufficient seal air pressure when estimating the remaining life. It may be added.

As described above, according to the remaining life estimation system and the solid fuel crusher according to the present embodiment, the remaining life estimation method, and the remaining life estimation program, information on the load applied to the roller 13 and the roller 13 with respect to the rotary table 12 Information on the tilt angle of the journal bearing 59 is acquired as a measured value, and the remaining life of the journal bearing 59 is estimated. Therefore, it is possible to deal with fluctuations in the operating state of the mill 10 provided with the roller 13 in consideration of the influence on the estimation of the remaining life, and the accuracy of estimating the remaining life can be improved. According to the lift amount X of the roller 13 with respect to the rotary table 12, the direction of the load applied to the journal bearing 59 can be estimated. Therefore, the remaining life of the journal bearing 59 can be estimated using the lift amount X of the roller 13.

By estimating the remaining life more accurately, maintenance (replacement, etc.) of the journal bearing 59 can be performed at a more appropriate timing. That is, since the journal bearing 59 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. The operating rate of the mill 10 and the power plant 1 can be improved.

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

As shown in FIG. 11, the control unit 60 in the present embodiment includes a prediction unit 64.
The prediction unit 64 determines the transition of the future remaining life from the transition of the remaining life estimated by the estimation unit 63 based on the database in which the operating state of the mill 10 and the remaining life transition characteristics corresponding to the operating state are accumulated in advance. Predict. The remaining life estimation characteristic is information indicating the characteristic of the remaining life that changes depending on the operating state, and specifically, it is a curve characteristic (may be a straight line) as shown in A, B, and C of FIG. That is, the database stores operation information up to the past or present 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. 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 state includes the type of solid fuel (coal type information), the supply amount of solid fuel (coal supply amount), information on the load applied to the roller 13 (hydraulic load), and the classifier (rotary classifier) provided on the mill 10. The rotation speed of 16) (the rotation speed of the classifier) and the differential pressure between the gas flowing into the mill 10 and the gas discharged from the mill 10 (the differential pressure in the mill 10 and an index indicating the load status of the mill 10). For example, it 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 journal bearing 59. The change in the remaining life with respect to the operating time between similar operating conditions is consistent within ± 10%, excluding the operation information (estimated remaining life) that is clearly judged to be out of order, and more preferably ± 5%. If there is a match within, the data of similar operating conditions may be prioritized and judged to be similar.

Specifically, the prediction unit 64 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 is estimated to be similar to the operating state of the mill 10 for which the remaining life is estimated. For example, when the type of solid fuel is used as the operating state, the solid fuel whose influence is assumed to be similar to the solid fuel of the mill 10 whose remaining life is estimated from the viewpoint of the degree of influence of the remaining life. The operating state including the above becomes a similar operating state. In each parameter of the operating state, the priority of the similarity judgment may be set, and the similarity judgment may be performed for the parameter having a high priority (for example, the type of solid fuel).

FIG. 12 is an example in which the remaining life transition characteristics in a similar operating state are selected for the mill 10 for which the remaining life is estimated. FIG. 12 shows an example in which characteristic A, characteristic B, and characteristic C are selected as the remaining life transition characteristics. Then, in FIG. 12, E1 (first estimation result), E2 (second estimation result), and En (nth estimation result), which are the estimation results of the remaining life of the mill 10 which is the target of the remaining life estimation, are shown. Is shown.

The prediction unit 64 is based on the estimation results from E1 to En of the estimation results of the remaining life for the mill 10 which is the target of estimating the remaining life from the selected remaining life transition characteristics (A, B, C). The remaining life transition characteristics (A, B, C) having the transition characteristics similar to the transition characteristics E are specified. In the example of FIG. 12, since the transition characteristic from E1 to En is similar to the characteristic B, the characteristic B is specified. Therefore, it is estimated that the mill 10 whose remaining life is to be estimated 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 with respect to the mill 10 for which the remaining life is estimated may be the transition characteristic from the time of completion to the present, the transition characteristic from the present to the past predetermined period, or the operation. A period in which the state has changed significantly (for example, the type of solid fuel has changed) may be selected as the transition characteristic.

As in the example of FIG. 12, even if the transition characteristic of the estimation result of the remaining life with respect to the mill 10 for which the remaining life is estimated does not completely correspond to the selected remaining life transition characteristic, Similar transition characteristics may be selected from the selected remaining life transition characteristics. If there is no transition characteristic similar to the transition characteristic of the estimation result of the remaining life for the mill 10 whose remaining life is to be estimated in the selected remaining life transition characteristics in the database up to the past or present, the selected remaining life transition characteristic The prediction may be made based on the transition characteristics. For example, in FIG. 12, 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, an intermediate line between the characteristic A and the characteristic B is generated by a proportional ratio of the difference between the characteristic A side and the characteristic B side, and the remaining life transition is predicted.

Processing by the prediction unit 64 (transition characteristics similar to the transition characteristics of the estimation results of the remaining life for the mill 10 that is the target of the selection of similar operating conditions in the database and the remaining life transition characteristics in the selected remaining life transition characteristics The selection of the remaining life transition characteristic with the above and the prediction of the future remaining life transition based on the selected remaining life transition characteristic) may be processed by a preset algorithm or appropriately processed using AI. May be.

As described above, according to the remaining life estimation system and the solid fuel crusher according to the present embodiment, the remaining life estimation method, and the remaining life estimation program, a database in which the operating state and the remaining life transition characteristics are associated with each other. Based on the above, it is possible to predict the future transition of the remaining life from the transition of the remaining life estimated by the estimation unit 63. It is possible to more accurately predict the transition of the remaining life in the future, and it is possible to carry out maintenance (replacement, etc.) of the journal bearing 59 at a more appropriate timing. That is, since the journal bearing 59 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. The operating rate of the mill 10 and the power plant 1 can be improved.

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

As shown in FIG. 13, the control unit 60 in the present embodiment includes a planning unit 65.
The planning unit 65 makes a maintenance plan based on the estimated remaining life. Specifically, from the remaining life estimated by the estimation unit 63 and the remaining life estimated by the prediction unit 64, it is determined at what time in the future the life will be completely consumed, and the maintenance plan is performed by the planning unit 65. I do. Since the remaining life can be estimated more accurately as described above, it is possible to make a plan with an appropriate margin before the life is completely consumed.

The planning unit 65 performs a maintenance plan before a predetermined period, for example, with respect to the estimated life arrival time. The predetermined period is set based on a period required for performing maintenance in a safe and efficient process, such as a period required for arranging and replacing the journal bearing 59. The maintenance plan includes, for example, a maintenance time, an operation plan for adjusting the maintenance time, and at least one of load sharing adjustments in a plurality of mills 10.

The maintenance time is the time (recommended time) for replacing the journal bearing 59, which is set based on the estimated remaining life. The maintenance time is set, for example, by adding a predetermined margin to the estimated life arrival time.

The operation plan for adjusting the maintenance time is the operation plan for the mill 10, and is for adjusting the maintenance time. For example, if the maintenance period has already been set and is later than the estimated lifespan, an operating plan is planned to extend the lifespan. Specifically, the type of solid fuel is changed, the degree of fineness of pulverization into solid fuel is relaxed, and the like. By making the operating condition appropriate, it is possible to extend the life in a safer and more efficient process and perform maintenance at an appropriate time. If the preset maintenance time is earlier than the estimated lifespan, plan an operation plan that increases the load so that the remaining lifespan does not increase, so that the remaining lifespan can be used effectively. May be.

The load sharing adjustment in the plurality of mills 10 is to appropriately adjust the load sharing among the mills 10 provided in the plurality of units. 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, when the life end point of one of the plurality of mills 10 is earlier than that of the other mill 10, the load of the mill 10 is reduced and the load of the other mill 10 is increased. It is possible to adjust the life end points of the plurality of mills 10 so as to match the burden.

FIG. 14 is an example of a system related to a maintenance plan. As shown in FIG. 14, 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 plan and make a proposal to the user. Although FIG. 14 illustrates a case where the planning unit 65 is provided as the planning system 103 on the device maker side, it may be provided on the solid fuel crushing device side of the user.

As described above, according to the remaining life estimation system and the solid fuel crusher according to the present embodiment, the remaining life estimation method, and the remaining life estimation program, maintenance is performed by performing a maintenance plan based on the estimated remaining life. You can make a plan with plenty of time to set. 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 remaining life estimation system and the solid fuel crusher, the remaining life estimation method, and the remaining life estimation program described in each of the above-described embodiments are grasped as follows, for example.
The remaining life estimation system according to the present disclosure is a remaining life estimation system for the journal bearing (59) of the roller (13) that crushes the solid fuel with the table (12), and is a load applied to the roller (13). Based on the acquisition unit (62) that acquires the measured value of the information regarding the above and the measurement value of the information regarding the inclination angle of the roller (13) with respect to the table (12), and the information acquired by the acquisition unit (62). A unit (63) for estimating the remaining life of the journal bearing (59) is provided. The table (12) is, for example, a rotary table 12.

According to the remaining life estimation system according to the present disclosure, information on the load applied to the roller (13) and information on the inclination angle of the roller (13) with respect to the table (12) are acquired as measured values of the journal bearing (59). Estimate the remaining life. Therefore, it is possible to respond to fluctuations in the operating state of the mill (10) provided with the rollers (13) in consideration of the influence on the estimation of the remaining life, so that the accuracy of estimating the remaining life can be improved. .. By estimating the remaining life more accurately, maintenance (replacement, etc.) of the journal bearing (59) can be performed at a more appropriate timing. That is, since the journal bearing (59) 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. The operating rates of the mill (10) and the power plant (1) can be improved.

The remaining life estimation system according to the present disclosure is a remaining life estimation system for the journal bearing (59) of the roller (13) that crushes the solid fuel with the table (12), and is a load applied to the roller (13). In the acquisition unit (62) and the acquisition unit (62), which acquire the measured value of the information related to the information and the measured value of the information related to the lift amount (X) which is the distance of the roller (13) to the table (12). An estimation unit (63) for estimating the remaining life of the journal bearing (59) based on the acquired information is provided.

According to the remaining life estimation system according to the present disclosure, information on the load applied to the roller (13) and information on the lift amount (X) of the roller (13) with respect to the table (12) are acquired as measured values, and the journal bearing ( Estimate the remaining life of 59). Therefore, it is possible to respond to fluctuations in the operating state of the mill (10) provided with the rollers (13) in consideration of the influence on the estimation of the remaining life, so that the accuracy of estimating the remaining life can be improved. .. According to the lift amount (X) of the roller (13) with respect to the table (12), the direction of the load applied to the journal bearing (59) can be estimated. Therefore, the lift amount (X) of the roller (13) is used to estimate the journal bearing (X). The remaining life of 59) can be estimated. By estimating the remaining life more accurately, maintenance (replacement, etc.) of the journal bearing (59) can be performed at a more appropriate timing. That is, since the journal bearing (59) 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. The operating rates of the mill (10) and the power plant (1) can be improved.

In the remaining life estimation system according to the present disclosure, the information regarding the load applied to the roller (13) may be the pressing force for pressing the roller (13) against the table (12).

According to the remaining life estimation system according to the present disclosure, the journal bearing (59) is efficiently applied by using the pressing force for pressing the roller (13) against the table (12) as information regarding the load applied to the roller (13). The load can be estimated and the remaining life can be estimated.

In the remaining life estimation system according to the present disclosure, the estimation unit (63) calculates a radial load (Lr) and a thrust load (Ls) applied to the journal bearing (59), and the radial load (Lr). And the thrust load (Ls) may be used to estimate the remaining life of the journal bearing (59).

According to the remaining life estimation system according to the present disclosure, the remaining life of the journal bearing (59) can be efficiently estimated by the radial load (Lr) and the thrust load (Ls) applied to the journal bearing (59). ..

In the remaining life estimation system according to the present disclosure, the acquisition unit (62) may acquire an actually measured value of information regarding the rotation speed of the journal bearing (59).

According to the remaining life estimation system according to the present disclosure, the measured value of the information on the rotation speed of the journal bearing (59) is acquired, and the rotation speed of the journal bearing (59) is added to the remaining life estimation of the journal bearing (59). By doing so, it is possible to take measures in consideration of the case where the rotation speed decreases or stops, so that the remaining life can be estimated more accurately.

In the remaining life estimation system according to the present disclosure, the acquisition unit (62) may acquire an actually measured value of information regarding the state of the lubricant of the journal bearing (59).

According to the remaining life estimation system according to the present disclosure, the lubrication of the journal bearing (59) can be used to estimate the remaining life of the journal bearing (59) by acquiring the measured value of the information regarding the state of the lubricant of the journal bearing (59). The state of the agent can be taken into consideration, and the remaining life can be estimated more accurately. The state of the lubricant is, for example, the degree of contamination or the state of deterioration of the lubricant.

The remaining life estimation system according to the present disclosure is estimated by the estimation unit (63) based on a database in which the operating state of the mill (10) and the remaining life transition characteristics corresponding to the operating state are accumulated in advance. A prediction unit (64) for predicting a future transition of the remaining life from the transition of the remaining life of the journal bearing (59) may be provided.

According to the remaining life estimation system according to the present disclosure, the future remaining life transition is based on the remaining life transition characteristic estimated by the estimation unit (63) based on the database in which the operating state and the remaining life transition characteristic are associated with each other. Can be predicted. It is possible to predict the transition of the remaining life in the future more accurately, and to carry out maintenance (replacement, etc.) of the journal bearing (59) at a more appropriate timing. That is, since the journal bearing (59) 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. The operating rates of the mill (10) and the power plant (1) can be improved.

In the remaining life estimation system according to the present disclosure, the operating state includes the type of solid fuel, the amount of solid fuel supplied, the information on the load, the rotation speed of the classifier provided in the mill (10), and the mill ( It may include at least one of the differential pressure between the gas flowing into the 10) and the gas discharged from the mill (10).

According to the remaining life estimation system according to the present disclosure, information on the type of solid fuel, the amount of solid fuel supplied, the load, the rotation speed of the classifier provided in the mill (10), and the inflow into the mill (10). The differential pressure between the gas and the gas discharged from the mill (10) is a factor that affects the remaining life. Therefore, as the operating state, the type of solid fuel, the amount of solid fuel supplied, the information on the load, the rotation speed of the classifier provided in the mill (10), and the gas and the mill (10) flowing into the mill (10). By using at least one of the differential pressures with the gas discharged from), it is possible to effectively predict the transition of the remaining life in the future.

The remaining life estimation system according to the present disclosure may include a planning unit (65) that performs maintenance planning based on the estimated remaining life of the journal bearing (59).

According to the remaining life estimation system according to the present disclosure, by performing a maintenance plan based on the estimated remaining life, it is possible to make a plan with a margin at the time when maintenance is set. Therefore, the operating rate can be improved. In the maintenance plan, for example, maintenance time, future operation plan for adjusting maintenance time (for example, change or proposal of solid fuel type, etc.), load sharing adjustment among multiple mills (10), etc. are performed. be able to.

The solid fuel crushing apparatus (100) according to the present disclosure rotatably supports a roller (13) for crushing solid fuel between a table (12) and the table (12), and the roller (13). It includes a journal bearing (59) and the above-mentioned remaining life estimation system.

The remaining life estimation method according to the present disclosure is a method for estimating the remaining life of the journal bearing (59) of the roller (13) that crushes the solid fuel with the table (12), and is a load applied to the roller (13). Based on the acquisition step of acquiring the measured value of the information regarding the above and the measured value of the information regarding the inclination angle of the roller (13) with respect to the table (12) and the information acquired in the acquisition step, the journal bearing (59). ) Has an estimation step for estimating the remaining life.

The remaining life estimation method according to the present disclosure is a method for estimating the remaining life of the journal bearing (59) of the roller (13) that crushes the solid fuel with the table (12), and is a load applied to the roller (13). Based on the acquisition step of acquiring the measured value of the information regarding the above and the measured value of the information regarding the lift amount (X) which is the distance of the roller (13) to the table (12) and the information acquired in the acquisition step. It has an estimation step of estimating the remaining life of the journal bearing (59).

The remaining life estimation program according to the present disclosure is a remaining life estimation program of the journal bearing (59) of the roller (13) that crushes the solid fuel with the table (12), and is a load applied to the roller (13). Based on the acquisition process for acquiring the measured value of the information regarding the above and the measured value of the information regarding the inclination angle of the roller (13) with respect to the table (12) and the information acquired in the acquisition process, the journal bearing (59). ) Is made to execute the estimation process for estimating the remaining life.

The remaining life estimation program according to the present disclosure is a remaining life estimation program of the journal bearing (59) of the roller (13) that crushes the solid fuel with the table (12), and is a load applied to the roller (13). Based on the acquisition process for acquiring the measured value of the information regarding the information and the measured value of the information regarding the lift amount (X) which is the distance of the roller (13) to the table (12) and the information acquired in the acquisition process. , The computer is made to execute the estimation process for estimating the remaining life of the journal bearing (59).

1: Power plant 10: Mill 11: Housing 12: Rotating table 13: Roller 14: Drive unit 16: Rotary classifier 16a: Blade 17: Fuel supply unit 18: Motor 19: Outlet 20: Coal feeder 21: Bunker 22 : Conveying part 23: Motor 24: Down spout part 30: Blower part 30a: Hot gas flow path 30b: Cold gas flow path 30c: Hot gas damper 30d: Cold gas damper 31: Primary air ventilator (PAF)
32: Push-in ventilator (FDF)
34: Heat exchanger 40: State detection unit 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 unit 55: Roller support 56: Main body 57: Protrusion 58: Stopper 59: Journal bearing 60: Control unit 62: Acquisition unit 63: Estimating unit 64: Prediction unit 65: Planning unit 71: Measuring bar 72: Gap sensor 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: Fireplace 220: Burner unit L1: Hydraulic load Lr: Radial load Ls: Thrust load X: Lift amount θ: Roller inclination angle

Claims

A system for estimating the remaining life of roller journal bearings that grind solid fuel to and from the table.
An acquisition unit that acquires a measured value of information on the load applied to the roller and a measured value of information on the inclination angle of the roller with respect to the table.
An estimation unit that estimates the remaining life of the journal bearing based on the information acquired by the acquisition unit, and an estimation unit.
Remaining life estimation system equipped with.
A system for estimating the remaining life of roller journal bearings that grind solid fuel to and from the table.
An acquisition unit that acquires a measured value of information on the load applied to the roller and a measured value of information on the lift amount, which is the distance of the roller to the table.
An estimation unit that estimates the remaining life of the journal bearing based on the information acquired by the acquisition unit, and an estimation unit.
Remaining life estimation system equipped with.
The remaining life estimation system according to claim 1 or 2, wherein the information regarding the load applied to the roller is a pressing force for pressing the roller against the table.
The estimation unit calculates the radial load and the thrust load applied to the journal bearing, and estimates the remaining life of the journal bearing based on the radial load and the thrust load. The remaining life estimation system according to item 1.
The remaining life estimation system according to any one of claims 1 to 4, wherein the acquisition unit acquires an actually measured value of information on the rotation speed of the journal bearing.
The remaining life estimation system according to any one of claims 1 to 5, wherein the acquisition unit acquires an actually measured value of information regarding the state of the lubricant of the journal bearing.
Based on a database in which the operating state of the mill and the remaining life transition characteristics corresponding to the operating state are accumulated in advance, the future transition of the remaining life is predicted from the transition of the remaining life of the journal bearing estimated by the estimation unit. The remaining life estimation system according to any one of claims 1 to 6, further comprising a prediction unit.
The operating states include the type of solid fuel, the amount of solid fuel supplied, the information on the load, the rotation speed of the classifier provided in the mill, and the gas flowing into the mill and the gas discharged from the mill. The remaining life estimation system according to claim 7, which comprises at least one of the differential pressures of the above.
The remaining life estimation system according to any one of claims 1 to 8, further comprising a planning unit for performing maintenance planning based on the estimated remaining life of the journal bearing.
With a table
A roller that grinds solid fuel between the table and
A journal bearing that rotatably supports the roller,
The remaining life estimation system according to any one of claims 1 to 9, and the remaining life estimation system.
A solid fuel crusher equipped with.
It is a method of estimating the remaining life of the journal bearing of a roller that grinds solid fuel to and from the table.
An acquisition process for acquiring a measured value of information on the load applied to the roller and a measured value of information on the inclination angle of the roller with respect to the table.
An estimation step for estimating the remaining life of the journal bearing based on the information acquired in the acquisition step, and an estimation step.
Remaining life estimation method having.
It is a method of estimating the remaining life of the journal bearing of a roller that grinds solid fuel to and from the table.
An acquisition step of acquiring a measured value of information on the load applied to the roller and a measured value of information on the lift amount which is the distance of the roller to the table.
An estimation step for estimating the remaining life of the journal bearing based on the information acquired in the acquisition step, and an estimation step.
Remaining life estimation method having.
A program for estimating the remaining life of roller journal bearings that grind solid fuel to and from the table.
An acquisition process for acquiring a measured value of information on the load applied to the roller and a measured value of information on the inclination angle of the roller with respect to the table.
Based on the information acquired in the acquisition process, the estimation process for estimating the remaining life of the journal bearing and the estimation process
Remaining life estimation program to run the computer.
A program for estimating the remaining life of roller journal bearings that grind solid fuel to and from the table.
An acquisition process for acquiring a measured value of information on the load applied to the roller and a measured value of information on the lift amount which is the distance of the roller to the table.
Based on the information acquired in the acquisition process, the estimation process for estimating the remaining life of the journal bearing and the estimation process
Remaining life estimation program to run the computer.