Abnormality detection system, solid fuel pulverizing device, and abnormality detection method

Abstract

Provided is an abnormality detection system and a solid fuel pulverizing device in which a failure of a sensor that detects an abnormality of a roller neck bearing is less likely to occur, and an abnormality detection method. The abnormality detection system is an abnormality detection system of a roller neck bearing (59) that rotatably supports a pulverizing roller (13) housed inside a housing (11) that constitutes an outer shell of a solid fuel pulverizing device and that pulverizes solid fuel between the pulverizing roller and a pulverizing table. The abnormality detection system includes a detection portion (80) provided at a front end portion of a neck head (45) located outside the housing (11), the neck head (45) supporting the pulverizing roller (13) via the roller neck bearing (59) and being attached to the housing (11), the detection portion (80) detecting information generated in the neck head (45) due to rotation of the pulverizing roller (13), and a detection portion that detects an abnormality of the roller neck bearing (59) based on the information detected by the detection portion (80).

Description

Technical Field

[0001] This disclosure relates to an anomaly detection system, a solid fuel pulverizing device, and an anomaly detection method. Background Technology

[0002] Traditionally, solid fuels such as biomass fuel or coal are pulverized into fine powder within a predetermined particle size range using a mill and then supplied to a combustion unit. The mill grinder clamps the solid fuel fed into the grinding table between the grinding table and grinding rollers for pulverization. A classifier separates the finely powdered fuel within the predetermined particle size range. Primary air, supplied from the outer periphery of the grinding table, is then conveyed to the boiler and burned in the combustion unit. In thermal power generation equipment, steam is generated by heat exchange with the combustion gases produced from burning the finely powdered fuel in the boiler. This steam drives a steam turbine, which in turn drives a generator connected to the steam turbine, thereby generating electricity.

[0003] The crushing roller is rotatably mounted on the journal head via a roller journal bearing. Furthermore, the journal head is oscillatingly mounted on the mill housing. During crushing, the crushing roller receives the crushing load via the journal head through a hydraulic cylinder or similar component mounted on the mill housing. Therefore, during mill operation, the roller journal bearing transmits the load from the hydraulic cylinder or similar component to the crushing roller, causing it to rotate.

[0004] Depending on the load and rotational speed, roller journal bearings may experience peeling or spalling on the rolling surface. This leads to a shortened lifespan due to use, eventually resulting in damage and reaching the end of their service life. Therefore, it is known to detect abnormalities in the rolling surface to investigate the lifespan of roller journal bearings (e.g., Patent Document 1).

[0005] Most abnormalities on the rolling surface manifest as vibrations in the roller journal bearings. Therefore, the device described in Patent Document 1 installs an abnormality detection sensor (vibration sensor) inside the crushing roller to detect the vibrations emitted by the roller journal bearings and perform abnormality diagnosis of the roller journal bearings.

[0006] Existing technical documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2018-81012 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] However, the device described in Patent Document 1 places the vibration sensor inside the crushing roller. Thus, if a sensor detecting abnormalities in the roller journal bearing is placed near the crushing roller, which is a vibration source, the sensor is prone to malfunction due to vibrations transmitted from the crushing roller. Furthermore, since the sensor is located inside the high-temperature mill, it is also prone to failure. Therefore, the reliability of the sensor is reduced.

[0010] Furthermore, because the sensor is located inside the crushing rollers within the mill, it cannot be installed or replaced without stopping the mill and disassembling the crushing rollers. Therefore, in cases where sensors need to be replaced due to malfunction or maintenance, or when adding sensors to an existing mill, the replacement or addition process can be lengthy. During replacement or addition operations, the mill cannot be operated, resulting in a decrease in operating efficiency.

[0011] This disclosure is made in view of the following circumstances, and its purpose is to provide an anomaly detection system, a solid fuel pulverizing device, and an anomaly detection method that makes it less likely for a sensor that detects anomalies in the roller journal bearing to malfunction.

[0012] In addition, the purpose is to provide an anomaly detection system, a solid fuel pulverizing device, and an anomaly detection method that allows for easy replacement and addition of sensors.

[0013] Technical solutions for solving the problem

[0014] To address the aforementioned issues, the anomaly detection system, solid fuel pulverizing device, and anomaly detection method disclosed herein employ the following technical solutions.

[0015] One aspect of this disclosure relates to an anomaly detection system for a roller journal bearing. The roller journal bearing supports a rotatable crushing roller, which is housed within a housing constituting the outer shell of a solid fuel crushing apparatus and crushes solid fuel between the crushing roller and the crushing table. The anomaly detection system comprises: a detection unit; a mounting portion located on the outer side of the housing and provided on a support portion; the support portion supporting the crushing roller via the roller journal bearing and mounted on the housing; the detection unit detecting information generated in the support portion due to the rotation of the crushing roller; and a detection unit detecting anomalies in the roller journal bearing based on the information detected by the detection unit.

[0016] One aspect of this disclosure relates to an anomaly detection method for a roller journal bearing, wherein the roller journal bearing supports a rotatable crushing roller, the crushing roller being housed inside a housing constituting a shell and crushing solid fuel between the crushing roller and a crushing table. The anomaly detection method comprises the following steps: a detection step, wherein a detection unit detects information generated in the support portion due to the rotation of the crushing roller, the detection unit being disposed in a portion of the support portion located outside the shell, the support portion supporting the crushing roller via the roller journal bearing and mounted on the shell; and a detection step, wherein an anomaly of the roller journal bearing is detected based on the information detected by the detection unit.

[0017] Invention Effects

[0018] According to this disclosure, the sensor that detects abnormalities in the journal bearing of the roller can be made less prone to failure.

[0019] In addition, it allows for easy replacement and additional settings of sensors. Attached Figure Description

[0020] Figure 1 This is a structural diagram showing the solid fuel pulverizing apparatus and boiler involved in the first embodiment of this disclosure.

[0021] Figure 2 This is a partially enlarged longitudinal sectional view showing the area around the crushing roller according to the first embodiment of this disclosure.

[0022] Figure 3 This is a partially enlarged front view showing the area around the journal head according to the first embodiment of this disclosure.

[0023] Figure 4 This is a partially enlarged perspective view showing the area around the journal head according to the first embodiment of this disclosure.

[0024] Figure 5 This is a functional block diagram illustrating the functions of the mill and control unit according to the first embodiment of this disclosure.

[0025] Figure 6 This is a diagram showing the bandpass filtering process performed by the control unit according to the first embodiment of this disclosure.

[0026] Figure 7 This is a diagram illustrating the envelope processing performed by the control unit according to the first embodiment of this disclosure.

[0027] Figure 8 This is a graph representing the FFT processing performed by the control unit according to the first embodiment of this disclosure.

[0028] Figure 9This is a graph showing the process performed by the control unit according to the first embodiment of this disclosure, which superimposes high-order harmonic components onto the bearing vibration frequency.

[0029] Figure 10 This is a hardware structure diagram of the control unit according to the second embodiment of this disclosure.

[0030] Figure 11 This is a functional block diagram illustrating the functions of the control unit according to the second embodiment of this disclosure.

[0031] Figure 12 This is a partially enlarged longitudinal sectional view showing the load state of the crushing roller according to the second embodiment of this disclosure.

[0032] Figure 13 This is a partially enlarged longitudinal sectional view showing the roller tilt angle according to the second embodiment of this disclosure.

[0033] Figure 14 This is a partially enlarged longitudinal sectional view showing the roller tilt angle according to the second embodiment of this disclosure.

[0034] Figure 15 This is a diagram illustrating a structural example of the gap sensor according to the second embodiment of this disclosure.

[0035] Figure 16 This is a flowchart illustrating the remaining lifetime estimation process according to the second embodiment of this disclosure.

[0036] Figure 17 This is a diagram showing the estimated result of the remaining lifetime according to the second embodiment of this disclosure.

[0037] Figure 18 This is a functional block diagram illustrating the functions of the control unit involved in a variation of the second embodiment of this disclosure.

[0038] Figure 19 This is a graph showing the predicted remaining lifetime of a variation of the second embodiment of this disclosure.

[0039] Figure 20 This is a functional block diagram illustrating the functions of the control unit involved in a variation of the second embodiment of this disclosure.

[0040] Figure 21 This is a diagram illustrating an example of a system involved in a maintenance plan according to a variation of the second embodiment of this disclosure.

[0041] Figure 22 This is a graph showing the estimated remaining life of the roller journal bearing per unit time and the change in the degree of bearing abnormality according to the second embodiment of this disclosure. Detailed Implementation

[0042] Hereinafter, with reference to the accompanying drawings, one embodiment of the anomaly detection system, solid fuel pulverizing device, and anomaly detection method involved in this disclosure will be described.

[0043] [First Implementation]

[0044] Hereinafter, a first embodiment of the present disclosure will be described with reference to the accompanying drawings. The power generation equipment 1 according to this embodiment includes a solid fuel pulverizing device 100 and a boiler 200.

[0045] In the following explanations, "above" refers to the direction above the plumb line, and "above" in "upper part" and "upper surface" refers to the portion above the plumb line. Similarly, "below" refers to the portion below the plumb line. The plumb line direction is not strictly defined and includes errors.

[0046] As an example, the solid fuel pulverizing device 100 of this embodiment is a device that pulverizes solid fuels such as biomass fuel or coal to generate fine fuel and supplies it to the burner (combustion device) 220 of the boiler 200.

[0047] Figure 1 The power generation equipment 1 shown includes a solid fuel pulverizer 100 and a boiler 200. It has one solid fuel pulverizer 100, but it can also be configured as a system with multiple solid fuel pulverizers 100 corresponding to multiple burners 220 of a boiler 200.

[0048] The solid fuel pulverizing apparatus 100 of this embodiment includes: a mill (pulverizing unit) 10, a silo (storage unit) 21, a coal feeder (fuel feeder) 25, an air supply unit (gas supply unit for transportation) 30, a status detection unit 40, and a control unit 50.

[0049] The mill 10 that pulverizes solid fuels such as coal or biomass fuel supplied to boiler 200 into fine powder fuel can be in the form of pulverizing only coal, pulverizing only biomass fuel, or pulverizing biomass fuel and coal together.

[0050] Here, biomass fuel refers to organic resources derived from renewable organisms, such as thinned timber, waste wood, driftwood, grass, waste, sludge, tires, and renewable fuels (pellet or fragments) made from them, and is not limited to the substances mentioned herein. Biomass fuels introduce carbon dioxide during the growth of biomass, thus achieving carbon neutrality by preventing the emission of carbon dioxide, which contributes to global warming; therefore, various studies have been conducted on its utilization.

[0051] The mill 10 includes: a housing 11, a crushing table 12, a crushing roller 13, a reducer (drive transmission unit) 14, a mill motor (drive unit) 15 connected to the reducer 14 and driving the crushing table 12 to rotate, a rotary classifier (classification unit) 16, a coal supply pipe (fuel supply unit) 17, and a classifier motor 18 driving the rotary classifier 16 to rotate.

[0052] The housing 11 is formed as a cylinder extending in the vertical direction and is a box that houses the crushing table 12, the crushing roller 13, the rotary classifier 16 and the coal supply pipe 17.

[0053] A coal supply pipe 17 is installed at the center of the top 42 of the housing 11. The coal supply pipe 17 supplies solid fuel from the silo 21 via the coal feeder 25 into the housing 11. It is arranged vertically at the center of the housing 11 and extends into the interior of the housing 11 at its lower end.

[0054] A speed reducer 14 is provided near the bottom part 41 of the housing 11, and the grinding table 12, which rotates by the driving force transmitted from the mill motor 15 connected to the speed reducer 14, is rotatably configured.

[0055] The crushing table 12 is a circular component when viewed from above, and is arranged facing the lower end of the coal pipe 17. The upper surface of the crushing table 12 may have an inclined shape, for example, with a lower center and a higher outer surface, or it may have a shape with the outer periphery bent upwards. The coal supply pipe 17 supplies solid fuel (in this embodiment, for example, coal or biomass fuel) from above to the crushing table 12 below, and the crushing table 12 clamps the supplied solid fuel between itself and the crushing roller 13 for crushing.

[0056] When solid fuel is fed from the coal supply pipe 17 into the center of the crushing table 12, it is guided towards the outer periphery of the crushing table 12 by centrifugal force based on the rotation of the crushing table 12, and is crushed between the crushing table 12 and the crushing roller 13. The crushed solid fuel is blown upward by the conveying gas (hereinafter referred to as primary air) 110 from the conveying gas flow path (hereinafter referred to as primary air) and guided to the rotary classifier 16.

[0057] An outlet (not shown) is provided on the outer periphery of the pulverizing table 12, allowing primary air flowing in from the primary air flow path 110 to exit into the space above the pulverizing table 12 within the housing 11. A swirling blade (not shown) is provided at the outlet to impart a swirling force to the primary air blown out from the outlet. The primary air imparted with swirling force by the swirling blade becomes an airflow with a swirling velocity component, conveying the solid fuel pulverized on the pulverizing table 12 to the rotary classifier 16 located above the housing 11. Furthermore, solid fuel particles larger than a predetermined particle size in the pulverized solid fuel are classified by the rotary classifier 16, or they fall back onto the pulverizing table 12 without reaching the rotary classifier 16, where they are pulverized again between the pulverizing table 12 and the pulverizing roller 13.

[0058] The crushing roller 13 is a rotating body that crushes solid fuel supplied from the coal supply pipe 17 to the crushing table 12. The crushing roller 13 is pressed against the upper surface of the crushing table 12 and works with the crushing table 12 to crush the solid fuel.

[0059] exist Figure 1 In this example, only one crushing roller 13 is typically shown, but multiple crushing rollers 13 are arranged at certain intervals in the circumferential direction, pressing against the upper surface of the crushing table 12. For example, three crushing rollers 13 are arranged at equal intervals in the circumferential direction, spaced 120° apart on the outer periphery. In this case, the portions of the three crushing rollers 13 that contact the upper surface of the crushing table 12 (the pressing portions) are equidistant from the rotational center axis of the crushing table 12.

[0060] The crushing roller 13 can swing up and down and move through the journal head 45, and is supported almost freely relative to the upper surface of the crushing table 12. When the crushing roller 13 is in contact with the solid fuel on the upper surface of the crushing table 12, it rotates due to the rotational force exerted on the crushing table 12. If solid fuel is supplied from the coal supply pipe 17, the solid fuel is pressed and crushed between the crushing roller 13 and the crushing table 12. This pressing force is called the crushing load.

[0061] The middle portion of the support arm 47 of the journal head 45 is supported by an eccentric shaft 48 along the horizontal direction, allowing the crushing roller 13 to swing and shift vertically about the eccentric shaft 48 on the side of the housing 11. Furthermore, a pressing device (crushing load application part) 46 is provided at the upper end of the support arm 47 on the vertical side. The pressing device 46 is fixed to the housing 11 and applies a crushing load to the crushing roller 13 via the support arm 47, etc., by pressing the crushing roller 13 against the crushing table 12. The crushing load is applied, for example, by a hydraulic cylinder (not shown) operated by the pressure of working oil supplied from a hydraulic device (not shown) located outside the mill 10. Alternatively, the crushing load can also be applied by the rebound force of a spring (not shown).

[0062] Furthermore, the detailed structure of the crushing roller 13 will be described later.

[0063] The reducer 14 is connected to the mill motor 15 and transmits the driving force of the mill motor 15 to the crushing table 12, causing the crushing table 12 to rotate around the central axis.

[0064] A rotary classifier 16 is disposed on the upper part of the housing 11 and has a hollow, inverted conical shape. The rotary classifier 16 has a plurality of blades 16a extending in the vertical direction on its outer periphery. Each blade 16a is arranged around the central axis of the rotary classifier 16 at a predetermined interval (equal interval).

[0065] The rotary classifier 16 is a device for classifying solid fuel (hereinafter, the pulverized solid fuel is referred to as "pulverized fuel") pulverized by the crushing table 12 and the crushing roller 13 into solid fuel with a particle size larger than a predetermined particle size (e.g., 70~100μm in the case of coal) (hereinafter, pulverized fuel with a particle size larger than the predetermined particle size is referred to as "coarse fuel") and solid fuel with a particle size smaller than the predetermined particle size (hereinafter, pulverized fuel with a particle size smaller than the predetermined particle size is referred to as "fine fuel"). The rotary classifier 16 is given rotational driving force by a classifier motor 18 controlled by the control unit 50, and rotates around the coal supply pipe 17 with a cylindrical shaft (not shown) extending in the vertical direction of the housing 11 as the center.

[0066] Alternatively, a fixed classifier may be used as the grading section, which has a fixed hollow inverted conical shell and multiple fixed swirling blades that replace the blades 16a at the outer periphery of the shell.

[0067] The pulverized fuel arriving at the rotary classifier 16 is relatively balanced by the centrifugal force generated by the rotation of the blades 16a and the centripetal force caused by the airflow of primary air. Large-diameter coarse fuel is knocked off by the blades 16a and returns to the pulverizing table 12 for further pulverization, while fine fuel is guided to the outlet port 19 located at the top 42 of the housing 11. The fine fuel classified by the rotary classifier 16, together with primary air, is discharged from the outlet port 19 into the fine fuel supply path (fine fuel supply pipe) 120 and supplied to the burner 220 of the boiler 200.

[0068] The coal supply pipe 17 is installed inside the housing 11 by extending along the lower end in the vertical direction through the top 42 of the housing 11, and supplies solid fuel from the upper part of the coal supply pipe 17 to the center of the crushing table 12. A coal feeder 25 is connected to the upper end of the coal supply pipe 17 to supply solid fuel.

[0069] The coal feeder 25 is connected to the hopper 21 via a pipe extending vertically from the lower end of the hopper 21, namely the discharge section 22. A valve (return valve, not shown) for switching the discharge state of solid fuel from the hopper 21 may also be installed midway through the discharge section 22. The coal feeder 25 includes a conveying section 26 and a coal feeder motor 27. The conveying section 26, for example, is a belt conveyor, which, driven by the coal feeder motor 27, transports the solid fuel discharged from the lower end of the discharge section 22 to the upper part of the coal supply pipe 17 and feeds it into the mill. The amount of solid fuel supplied to the mill 10 is controlled according to a signal from the control unit 50, for example, by adjusting the moving speed of the belt conveyor in the conveying section 26.

[0070] Typically, primary air is supplied inside the mill 10 to deliver the pulverized fuel to the burner 220, and the pressure is higher than that of the coal feeder 25 and the hopper 21. The interior of the discharge section 22, which connects the hopper 21 to the coal feeder 25, is in a fuel-stacked state. This solid fuel layer ensures a seal (material seal) from the mill 10 toward the hopper 21 to prevent backflow of primary air and pulverized fuel.

[0071] Before pulverization, biomass fuels such as wood fragments and wood pellets are of a constant size compared to coal. For example, before pulverization, coal is in the form of 2-50 mm lumps, while wood pellets are cylindrical with a diameter of 6-8 mm and a length of less than 40 mm, and are homogeneous. When coal is stacked in the feed section 22, it becomes a state where small-sized coal fills the gaps between larger-sized coal, resulting in a dense stacked state. On the other hand, when biomass fuel is stacked in the feed section 22, it is of uniform size compared to coal, so it cannot achieve the filling effect of gaps caused by particles of different sizes, and the gaps formed between the biomass fuels become larger. Therefore, the primary air inside the mill 10 and the pulverized fuel create a backflow from inside the mill 10 through the gaps formed in the solid fuel layer in the feed section 22 towards the hopper 21, and the possibility of pressure drop inside the mill 10 is higher when using biomass fuel compared to when using coal fuel.

[0072] Furthermore, if the primary air and pulverized fuel flow backward toward the hopper 21 side and the pressure inside the mill 10 drops, various problems may occur during the stable operation of the solid fuel pulverizing device 100 and the boiler 200, such as deterioration of the conveyability of pulverized fuel inside the mill 10, dust generation inside the coal feeder 25 or above the hopper 21, ignition of solid fuel inside the coal feeder 25, hopper 21, and discharge section 22, and a decrease in the amount of pulverized fuel delivered to the burner 220.

[0073] Therefore, a rotary valve (not shown) can be installed in the middle of the coal supply pipe 17 that connects the coal feeder 25 to the inside of the mill 10 to suppress the backflow of primary air and pulverized fuel from the inside of the mill 10 through the coal feeder 25 and the material drop section 22 toward the hopper 21.

[0074] The air supply unit 30 is a device that supplies primary air, used to dry the pulverized fuel and deliver it to the rotary classifier 16, into the interior of the housing 11.

[0075] In order to properly adjust the flow rate and temperature of the primary air supplied to the interior of the housing 11, in this embodiment, the air supply unit 30 includes: a primary air fan (PAF) 31, a hot air flow path 30a, a cold air flow path 30b, a hot air damper 30c, and a cold air damper 30d.

[0076] In this embodiment, a portion of the air delivered from the primary air fan 31 is supplied as hot air through the air preheater (heat exchanger) 34 in the hot air flow path 30a. A hot air damper 30c is provided in the hot air flow path 30a. The opening degree of the hot air damper 30c is controlled by the control unit 50. The flow rate of the hot air supplied from the hot air flow path 30a is determined based on the opening degree of the hot air damper 30c.

[0077] The cold air flow path 30b supplies a portion of the air delivered from the primary air fan 31 as ambient temperature cold air. A cold air damper 30d is provided in the cold air flow path 30b. The opening degree of the cold air damper 30d is controlled by the control unit 50. The flow rate of the cold air supplied from the cold air flow path 30b is determined based on the opening degree of the cold air damper 30d.

[0078] In this embodiment, the primary air flow rate is the sum of the flow rate of hot air supplied from the hot air flow path 30a and the flow rate of cold air supplied from the cold air flow path 30b. The temperature of the primary air is determined by the mixing ratio of the hot air supplied from the hot air flow path 30a and the cold air supplied from the cold air flow path 30b, and is controlled by the control unit 50.

[0079] Alternatively, a portion of the combustion gases discharged from the boiler 200 can be guided and mixed with the hot gas supplied from the hot gas flow path 30a by a gas recirculation fan (not shown), thereby adjusting the oxygen concentration in the primary air supplied from the primary air flow path 110 to the interior of the casing 11. By adjusting the oxygen concentration in the primary air, for example, when using a solid fuel with high ignition (easy ignition), ignition of the solid fuel can be suppressed in the path from the mill 10 to the burner 220.

[0080] In this embodiment, the data measured or detected by the state detection unit 40 of the mill 10 is sent to the control unit 50. The state detection unit 40 in this embodiment is, for example, a differential pressure measurement unit, which measures the differential pressure of the mill 10 as the pressure between the portion of primary air flowing from the primary air flow path 110 into the interior of the housing 11 and the pressure at the outlet port 19 where primary air and fine fuel are discharged from the interior of the housing 11 into the fine fuel supply pipe 120. The increase or decrease in this differential pressure of the mill 10 corresponds to the increase or decrease in the circulation amount of the pulverized fuel circulating between the vicinity of the rotary classifier 16 and the vicinity of the pulverizing table 12 inside the housing 11 due to the classification effect of the rotary classifier 16. That is, by adjusting the rotational speed of the rotary classifier 16 according to the differential pressure of the mill 10, the amount and particle size range of the fine fuel discharged from the outlet port 19 can be adjusted. Therefore, the particle size of the fine fuel can be maintained within a range that does not affect the combustibility of the solid fuel in the burner 220, and the amount of fine fuel corresponding to the amount of solid fuel supplied to the mill 10 can be stably supplied to the burner 220 provided in the boiler 200.

[0081] Furthermore, the state detection unit 40 in this embodiment is, for example, a temperature measurement unit, which detects the temperature of the primary air supplied to the interior of the housing 11 (mill inlet primary air temperature) and the temperature of the mixture of primary air and pulverized fuel at the outlet port 19 (mill outlet primary air temperature), and controls the air supply unit 30 in a manner that does not exceed their respective upper limit temperatures. Each upper limit temperature is determined taking into account factors such as the ignition probability corresponding to the properties of the solid fuel. In addition, the primary air is cooled inside the housing 11 by being transported while drying the pulverized fuel, so the primary air temperature at the mill inlet is, for example, from room temperature to about 300 degrees Celsius, and the primary air temperature at the mill outlet is, for example, from room temperature to about 90 degrees Celsius.

[0082] The control unit 50 is a device that controls the various parts of the solid fuel pulverizing device 100.

[0083] The control unit 50 can also transmit drive instructions to the mill motor 15 to control the rotation speed of the crushing table 12.

[0084] The control unit 50, for example, transmits a drive instruction to the classifier motor 18 to control the rotation speed of the rotary classifier 16 and adjust the classification performance, maintaining the particle size of the fine fuel within a range that does not affect the combustibility of the solid fuel in the burner 220, and is able to stably supply the burner 220 with an amount of fine fuel corresponding to the amount of solid fuel supplied to the mill 10.

[0085] In addition, the control unit 50 can, for example, adjust the amount of solid fuel supplied to the mill 10 (coal supply) by transmitting a drive instruction to the coal feeder motor 27.

[0086] Furthermore, the control unit 50 can adjust the flow rate and temperature of primary air by controlling the opening of the hot air damper 30c and the cold air damper 30d by transmitting an opening instruction to the air supply unit 30. Specifically, the control unit 50 controls the opening of the hot air damper 30c and the cold air damper 30d so that the flow rate of primary air supplied to the interior of the housing 11 and the temperature of the primary air at the outlet port 19 (mill outlet primary air temperature) are predetermined values ​​set according to each type of solid fuel and corresponding to the coal supply quantity. In addition, the temperature of the primary air can also be controlled at the mill inlet temperature (mill inlet primary air temperature).

[0087] The control unit 50 is composed of, for example, a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), and a computer-readable storage medium. As an example, a series of processes for implementing various functions are stored in the storage medium in the form of programs. The CPU reads the program into RAM, etc., and performs information processing and arithmetic to achieve various functions. Alternatively, the program can be pre-installed on ROM or other storage media, provided in a state stored on a computer-readable storage medium, or distributed via wired or wireless communication units. Computer-readable storage media include disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, etc. Furthermore, HDDs can be replaced with solid-state drives (SSDs).

[0088] Furthermore, the structure of the control unit 50 is not limited to the structure described above. For example, the hardware structure of the control unit 50 may also be as follows: Figure 11 It is constructed as shown. This will be described later. Figure 11 The detailed contents of the structure shown.

[0089] Next, a boiler 200 that generates steam by burning finely powdered fuel supplied from a solid fuel pulverizing device 100 will be described. The boiler 200 includes a furnace 210 and a burner 220.

[0090] Burner 220 is a device that uses a mixture of pulverized fuel supplied from pulverized fuel supply pipe 120 and primary air, and secondary air supplied by heating air (external air) delivered from forced draft fan (FDF) 32 using air preheater 34, to ignite the pulverized fuel and form a flame. Combustion of the pulverized fuel takes place inside furnace 210, and the high-temperature combustion gases are discharged to the outside of boiler 200 after passing through heat exchangers such as evaporator, superheater, and fuel saver (not shown).

[0091] Combustion gases discharged from boiler 200 undergo predetermined treatment in environmental devices (such as denitrification devices, dust collection devices, and desulfurization devices, not shown in the diagram), and exchange heat with primary and secondary air in air preheater 34. The gases are then guided to the chimney (not shown) via induced draft fan (IDF) 33 and released to the outside air. Air heated by the combustion gases in air preheater 34 and supplied from primary air fan 31 is then supplied to the aforementioned hot air flow path 30a.

[0092] The water supplied to each heat exchanger of boiler 200 is heated in the coal saver (not shown), and then further heated by the evaporator (not shown) and superheater (not shown) to generate high-temperature and high-pressure superheated steam. The steam is then transported to the steam turbine (not shown), which serves as the power generation unit, and the steam turbine is rotated to drive the generator (not shown) connected to the steam turbine to generate electricity, thus constituting the power generation equipment 1.

[0093] Next, use Figures 2 to 9 The details of the crushing roller 13 and the abnormality detection system are explained.

[0094] First, use Figures 2 to 4 A detailed example of the structure of the crushing roller 13 will be described. The crushing roller 13 is supported on the housing 11 by a journal head (support part) 45. The journal head 45 includes: a journal shaft 52 on which the crushing roller 13 is mounted; a body 56 that holds the journal shaft 52; an eccentric shaft 48 that is fixedly mounted on the side of the body 56; a support arm 47 that is mounted on the upper surface of the body 56 in an upward extending manner; and a protrusion 57 that is provided on the lower surface of the body 56 in a downward protruding manner.

[0095] A hollow hub 51, roughly cylindrical in shape, is mounted at the center of the crushing roller 13. The crushing roller 13 is mounted to the front end of the journal shaft 52 via the hub 51. That is, the crushing roller 13 is mounted to the journal shaft 52 via a journal bearing (roller journal bearing) 59, thereby allowing the crushing roller 13 to rotate circumferentially around the journal shaft 52. The roller journal bearing 59 is, for example, a roller bearing. Furthermore, as described later, in this embodiment, abnormalities in the roller journal bearing 59 are detected. The eccentric shaft 48 is configured with its axis roughly horizontal and extends tangentially along the circular shape of the crushing table 12. The journal head 45 can rotate around the eccentric shaft 48. By rotating around the eccentric shaft 48, the distance of the crushing roller 13 relative to the crushing table 12 (lift x (refer to...)) is... Figure 15 The changes will occur.

[0096] A pressing device 46 is mounted on the upper end of a pressing support arm 47 on the housing 11. The pressing device 46 includes: an intermediate piston 53 mounted on the housing 11 in a position movable in the longitudinal direction; and a hydraulic load unit 54 mounted on the outer periphery of the housing 11, pressing the outer end of the intermediate piston 53. The inner end of the intermediate piston 53 contacts the outer periphery of the upper end of the support arm 47. The pressing device 46 generates a hydraulic load L1 (see reference 54) through the hydraulic load unit 54. Figure 12 This causes the intermediate piston 53 to move along its length, thereby causing the journal head 45 to swing about the eccentric shaft 48. That is, the crushing roller 13 is pressed against the crushing table 12 by the pressing device 46.

[0097] When the journal head 45 swings to a certain position around the eccentric shaft 48, the protrusion 57 abuts against the stop 58. The stop 58 functions as a limiting component to restrict the amount of movement of the crushing roller 13 in the direction of pressing the crushing table 12.

[0098] Next, the anomaly detection system will be described. The anomaly detection system includes: a vibration sensor 80, which detects vibrations generated at the journal head 45 due to the drive of the crushing roller 13; and a control unit (detection unit) 50, which detects anomalies (damage, etc.) in the roller journal bearing 59 based on the vibration information detected by the vibration sensor 80.

[0099] like Figure 3 and Figure 4 As shown, the eccentric shaft 48 is arranged to penetrate the housing 11. Therefore, the horizontal front end portion (installation portion) 48a of the eccentric shaft 48 is located outside the housing 11. That is, the front end portion 48a protrudes outside the housing 11.

[0100] like Figure 3 As shown, a base 81 is fixed to the end face of the front end 48a. The front end 48a and the base 81 are fixed in a manner that prevents relative movement. The base 81 has a foot extending in a horizontal direction and a vertical plate portion fixed to the front end of the foot. A vibration sensor 80 is fixed to the surface of the vertical plate portion. Specifically, a first sensor 80a, a second sensor 80b, and a third sensor 80c are fixed. The base 81 is fixed to the first sensor 80a, the second sensor 80b, and the third sensor 80c in a manner that prevents relative movement.

[0101] The first sensor 80a, for example, detects the up and down direction ( Figure 4 Vibration in the Y-axis direction. The second sensor 80b, for example, detects the extension direction of the eccentric shaft 48 (...). Figure 4 Vibration in the Z-axis direction. The third sensor 80c detects the extension direction of the journal shaft 52 (in the Z-axis direction). Figure 4 Vibration in the X-axis direction (of the image).

[0102] In addition, Figure 4 In the process, there are front ends 48a at both ends of the eccentric shaft 48, but it is sufficient to set the first sensor 81a, the second sensor 80b and the third sensor 80c at any end of the front ends 48a.

[0103] As described above, the crushing roller 13, etc., can be positioned along the central axis of the eccentric shaft 48 (refer to...) Figure 3 The single-dot dashed line is the center of the oscillation. Therefore, the vertical direction of the vibration of the roller journal bearing 59 is ( Figure 4 Vibration in the Y-axis direction (as shown in the image) is transmitted as rotational motion centered on the eccentric shaft 48. Therefore, the sensor for detecting vibration in the vertical direction is preferably not located on the central axis of the eccentric shaft 48, but rather preferably located on the outer periphery of the eccentric shaft 48 in a manner capable of detecting vibration in the tangential direction. This is because vibration in the torsional direction (refer to...) Figure 3 The vibration on the arrow (in the diagram) is transmitted to the eccentric shaft 48. Therefore, if it is set on the central axis of the eccentric shaft 48, a sensor for detecting torsional vibration must be used, which may not be compatible with sensors that detect axial vibration in other directions.

[0104] In this embodiment, such as Figure 2 and Figure 3 As shown, the first sensor 80a, the second sensor 80b, and the third sensor 80c are all not located on the central axis of the eccentric shaft 48.

[0105] If the vibration sensor 80 is located at the front end 48a of the eccentric shaft 48, the distance from the roller journal bearing 59, which is the vibration source, to the vibration sensor 80 becomes longer compared to, for example, a case where the sensor is located inside the crushing roller 13. Therefore, the vibration transmitted to the vibration sensor 80 may be attenuated. If the vibration is attenuated, it may be impossible to accurately detect any abnormalities in the roller journal bearing 59; therefore, it is preferable to implement countermeasures to attenuate the vibration.

[0106] Therefore, in this embodiment, the vibration transmission path from the roller journal bearing 59 to the vibration sensor 80 is the shortest and has the highest rigidity. In this embodiment, as... Figure 2 As shown, the vibration of the roller journal bearing 59 is transmitted via the journal shaft 52 and the journal head 45 (body 56 and eccentric shaft 48). Therefore, the engagement of the components that form the path of these vibration transmissions becomes a rigid engagement that does not allow the individual components to move relative to each other.

[0107] In detail, the engagement of the roller journal bearing 59 with the journal shaft 52, the engagement of the journal shaft 52 with the journal head 45 (more specifically, the main body 56), the engagement of the main body 56 with the eccentric shaft 48, and the engagement of the eccentric shaft 48 with the vibration sensor 80 (more specifically, the base 81) are rigid engagements.

[0108] Specific examples of rigid joints include those based on thermoforming or tapered pressing. Rigid joints can also be formed by manufacturing them as a single piece or by securely fastening them with fasteners.

[0109] Furthermore, the components that form the transmission path (journal 52, the main body 56 of the journal head 45, and the eccentric shaft 48) are designed to have sufficient cross-sectional area when cut in the direction intersecting the length direction in order to improve rigidity. With this configuration, deformation of each component can be suppressed, and vibration attenuation due to deformation is less likely.

[0110] Furthermore, the components that form the transmission path from the roller journal bearing 59 to the vibration sensor 80 are not made of materials with high vibration damping capacity, such as cast iron, but rather of materials with low vibration damping capacity, such as structural carbon steel or cast steel. This configuration helps to suppress vibration damping.

[0111] The vibration frequency generated when the roller journal bearing 59 malfunctions can be estimated to some extent based on the structure of the roller journal bearing 59 and the rotational speed of the crushing roller 13. The inherent vibration frequency (noise) of the component that becomes the vibration transmission path is set to be inconsistent with the vibration frequency (signal) expected to be generated when the roller journal bearing 59 malfunctions. This is because if the inherent vibration frequency of the component that becomes the vibration transmission path is consistent with the vibration frequency generated when the roller journal bearing 59 malfunctions, it may be impossible to determine whether the vibration waveform detected by the vibration sensor 80 is caused by the abnormal vibration of the roller journal bearing 59 or by the inherent vibration frequency of the component that becomes the vibration transmission path. This is to prevent such an undesirable situation.

[0112] Furthermore, the natural vibration frequency of the component that becomes the vibration transmission path can be calculated or experimentally determined through methods such as hammering tests. Additionally, if it is assumed that the natural vibration frequency of the component that becomes the vibration transmission path is the same as the vibration frequency generated when the roller journal bearing 59 malfunctions, it is preferable to change the spring constant and mass of the component that becomes the vibration transmission path to offset the natural vibration frequency from the expected vibration frequency. Furthermore, if only a specific higher harmonic component (Nth order) is consistent, it is also possible to exclude that higher harmonic from the evaluation.

[0113] In this embodiment, as described above, there are many components that serve as vibration transmission paths. Therefore, the vibration information detected by the vibration sensor 80 includes not only the vibration information of the roller journal bearing 59, but also a great deal of vibration information (noise). In particular, such as Figure 5As shown, in the mill 10, the vibrations generated during the crushing of solid fuel become disturbances. Before the vibrations are transmitted from the roller journal bearing 59 to the vibration sensor 80, there are many larger vibrations besides those from the roller journal bearing 59. Therefore, it is preferable to process the received signals before the vibration is evaluated by the control unit 50.

[0114] The control unit 50 of this embodiment includes a signal amplifier 91, a signal processing device 92, a signal calculation device 93, and an equipment control device 94. Furthermore, in the solid fuel pulverizing apparatus 100 of this embodiment, the signal amplifier 91 (e.g., an amplifier) ​​amplifies the vibration signal detected by the vibration sensor 80. Then, the signal processing device 92 processes the amplified signal to remove interference. Then, the signal calculation device 93 calculates the processed signal to detect any abnormalities in the roller journal bearing 59. Additionally, the signal calculation device 93 can also derive the degree of abnormality (damage level) of the roller journal bearing 59 and the replacement period for the roller journal bearing 59. Furthermore, the information derived by the signal calculation device 93, etc., can be displayed on the display device 95.

[0115] The signal calculation device 93 sends the exported information to the equipment control device 94, which controls various devices constituting the power generation equipment 1, such as the mill 10, based on the received information. Alternatively, the control content can be displayed on the display device 96.

[0116] Next, use Figures 6 to 9 An example of a signal processing method and a signal calculation method performed by the control unit 50 (signal processing device 92 and signal calculation device 93) will be described.

[0117] The control unit 50 first performs filtering. Filtering is a process that removes signals with inherent vibration frequencies of components that become part of the transmission path from the vibration information detected by the vibration sensor 80, picking up only signals in the necessary frequency bands. Figure 6 The details of the filtering process are explained. Figure 6 (a) represents the time-dependent change in the signal value detected by vibration sensor 80. Additionally, Figure 6 (c) represents the natural vibration frequency of the component that becomes the transmission path. Additionally, Figure 6 (b) shows the signal value after removing the inherent vibration frequency of the component that becomes the transmission path from the vibration information detected by vibration sensor 80. That is, the signal value after removing the inherent vibration frequency of the component that becomes the transmission path from the vibration information detected by vibration sensor 80. Figure 6 The graph obtained by adding (b) and (c) is (a).

[0118] In addition, during the filtering process, signals based on the frequency of vibrations from the crushing of solid fuel can also be removed.

[0119] Next, the control unit 50 processed the filtered signal values ​​(from... Figure 6 (b) and Figure 7 The signal value shown in (a) is subjected to envelope processing (envelope processing). Envelope processing is the process of removing signals caused by minor vibrations resulting from the unevenness of the rolling surface of the roller journal bearing 59, and converting them into an envelope signal representing the shape of the damage. By performing envelope processing, such as Figure 7 As shown in (b), the peaks of the signal value are simplified.

[0120] Next, the control unit 50 processed the envelope values ​​of the signal (from... Figure 7 (b) and Figure 8 The signal values ​​shown in (a) are subjected to frequency analysis processing. Frequency analysis processing, such as Fast Fourier Transform (FFT) processing, is a process that reorganizes the signal magnitude for each frequency. By performing FFT processing, such as... Figure 8 As shown in (b), the distribution of signal values ​​relative to frequency magnitude is illustrated.

[0121] Next, the control unit 50 processed the signal values ​​(from FFT) Figure 8 (b) and Figure 9 The signal value shown in (a) is processed to make the frequency (specific frequency) of the vibration generated when the roller journal bearing 59 is damaged coincide with its integer multiples of higher harmonic components. Furthermore, this specific frequency is an inherent value of the bearing, and its theoretical value can be calculated based on the bearing dimensions (diameter of the inner ring, outer ring, and rolling elements) and rotational speed. Specifically, this processing derives the signal value from the bearing's dimensions (diameter of the inner ring, outer ring, and rolling elements) and rotational speed. Figure 9 The average value of the signal values ​​corresponding to the frequency differences X1 and X2 in (a) is processed. Through this processing, such as... Figure 9 As shown in (b), the distribution of signal values ​​relative to the frequency difference is illustrated. In this embodiment, the frequency difference X2 is near the abnormal frequency of the roller journal bearing 59. Therefore, in Figure 9 In example (b), the signal value of frequency difference X2 increases, so it can be determined that the roller journal bearing 59 has produced an abnormality.

[0122] Thus, the control unit 50 (signal processing device 92 and signal calculation device 93) performs signal processing and calculation. Furthermore, the method of signal processing and calculation is an example and is not limited to the method described above. For example, if it is determined that the noise contained in the vibration information detected by the vibration sensor 80 is sufficiently small, filtering and envelope processing may be omitted.

[0123] Next, an example of a method for deriving the degree of abnormality (damage) of the roller journal bearing 59 by the control unit 50 (signal processing device 92 and signal calculation device 93) will be described.

[0124] Basically, the more the lifespan of the roller journal bearing 59 increases (i.e., the more severe the abnormality), the more vibrations occur at a specific frequency (the frequency of vibration generated when the roller journal bearing 59 is abnormal) and its integer multiples of higher harmonic components. This threshold (how much vibration is required for damage) should be evaluated according to the following criteria.

[0125] Typically, the abnormality (damage) of the roller journal bearing 59 progresses gradually as follows. The following description divides the degree of abnormality into four stages in order of severity: "Initiation Stage," "Early Damage Stage," "Middle Damage Stage," and "Late Damage Stage." In the Initiation Stage, vibration increases in the frequency range above 10 kHz. At this time, very minor damage occurs on the rolling surface of the roller journal bearing 59, but only a difference in gloss is visually perceptible. In the Early Damage Stage, vibration increases in the frequency range of a few kHz. At this time, transfer marks appear on the rolling surface of the roller journal bearing 59. In the Middle Damage Stage, vibration increases in the frequency range of tens of Hz to 1 kHz. At this time, initial peeling occurs on the rolling surface of the roller journal bearing 59. In the Late Damage Stage, vibration increases across the entire frequency range. At this time, clear peeling occurs on the rolling surface of the roller journal bearing 59.

[0126] Thus, as the anomaly progresses, the frequency domain of the detected vibration signal shifts towards lower frequencies. Therefore, by performing frequency analysis on the vibration signal and processing the vibrations of specific frequencies and their higher harmonic components in each frequency region, it can be determined that the damage has progressed to the level corresponding to that frequency region when an increase in vibrations at abnormal frequencies is detected.

[0127] In addition, as a threshold for determining an increase in vibration, it is preferable to set it between 0.1 and 10G based on the specifications of the equipment in the case of vibration acceleration. However, for general structures, it can also be set to the values ​​shown in ISO-10816 and JIS-B-0906.

[0128] Additionally, the status of the roller journal bearing 59 can be displayed on display devices 95, 96, etc., according to the progression of the abnormality. Specifically, for example, it can display "Normal, please prepare defensive supplies" during the creation phase. It can also display "Initial damage, please purchase supplies" during the initial damage phase. Furthermore, it can display "Mid-damage, please plan replacement" during the middle damage phase. Finally, it can display "Late damage, please replace the roller journal bearing" during the later damage phase.

[0129] According to this embodiment, the following effects are achieved.

[0130] In this embodiment, the vibration sensor 80 is disposed at the journal head 45. Therefore, compared to, for example, disposing of the vibration sensor 80 inside the crushing roller 13, vibrations generated by the crushing roller 13 are less likely to be transmitted to the vibration sensor 80. Thus, malfunctions of the vibration sensor 80 caused by vibrations of the crushing roller 13 can be suppressed. Furthermore, the vibration sensor 80 is disposed at the front end 48a of the eccentric shaft 48 located outside the housing 11 at the journal head 45. Therefore, the vibration sensor 80 is less susceptible to the effects of the crushed solid fuel and high-temperature gases (such as air) within the housing 11 of the mill 10, thus suppressing malfunctions of the vibration sensor 80. This makes the vibration sensor 80 less prone to failure, thereby improving its reliability.

[0131] Furthermore, the vibration sensor 80 is located at the front end 48a of the eccentric shaft 48, which is situated outside the housing 11. This allows access to the vibration sensor 80 without stopping the mill 10 or disassembling the housing 11 and the crushing roller 13. Therefore, in cases where the vibration sensor 80 needs replacement due to malfunction or maintenance, or when adding a vibration sensor 80 to an existing mill, the replacement or addition of the vibration sensor 80 is simplified. Additionally, the mill 10 can be operated even during replacement or addition operations, thus improving operating efficiency.

[0132] In this embodiment, the control unit 50 detects abnormalities in the roller journal bearing 59 based on vibrations detected by the vibration sensor 80. When the crushing roller 13 crushes solid fuel, the crushing roller 13 vibrates. The vibration generated by the crushing roller 13 is transmitted from the crushing roller 13 to the journal head 45 via the roller journal bearing 59. Therefore, when an abnormality occurs in the roller journal bearing 59, the vibration transmitted to the journal head 45 changes. Thus, an abnormality in the roller journal bearing 59 can be detected.

[0133] The frequency of the vibration generated when the crushing roller 13 crushes solid fuel, and the inherent vibration frequency of the transmission path from the roller journal bearing 59 to the vibration sensor 80, do not change based on the state (normal or abnormal) of the roller journal bearing 59. In this embodiment, frequency components that do not change based on the state of the roller journal bearing 59 are removed from the vibration information detected by the vibration sensor 80. Therefore, the accuracy of detecting abnormalities in the roller journal bearing 59 can be improved.

[0134] In this embodiment, the control unit 50 processes the vibration information detected by the vibration sensor 80 according to the magnitude of the signal at each frequency (frequency analysis). This allows for more accurate detection of abnormalities in the roller journal bearing 59.

[0135] In this embodiment, the control unit 50 detects the degree of progression of the abnormality in the roller journal bearing 59 based on vibration information detected by the vibration sensor 80. When the abnormality (e.g., damage) in the roller journal bearing 59 progresses, the vibration of the journal head 45 changes. Therefore, the control unit 50 is able to detect the degree of progression of the abnormality in the roller journal bearing 59.

[0136] In this embodiment, the journal head 45 and the roller journal bearing 59 are engaged in a manner that prevents relative movement. Furthermore, the journal head 45 is engaged with the vibration sensor 80 in a manner that prevents relative movement. Therefore, the information from the roller journal bearing 59 is less likely to change at both the engagement portion of the journal head 45 and the roller journal bearing 59 and the engagement portion of the journal head 45 and the vibration sensor 80. Thus, the vibration sensor 80 can appropriately detect information about the roller journal bearing 59. Consequently, abnormalities in the roller journal bearing 59 can be detected more accurately.

[0137] [Variation Example]

[0138] Next, variations of this embodiment will be described.

[0139] The vibration sensor 80 can be installed at any location not limited to the front end 48a of the eccentric shaft 48, but can be located near the roller journal bearing 59, on the outer side of the mill housing 11, and where vibration transmission attenuation is minimal. For example, such as Figure 2 As shown by the dashed line, in the case where the base end of the journal shaft 52 (the end opposite to the end where the crushing roller 13 is provided) is located outside the housing 11 of the mill 10, a vibration sensor 80 may also be provided at the base end of the journal shaft 52.

[0140] Furthermore, when a mill 10 has multiple crushing rollers 13 and multiple roller journal bearings 59, it is preferable to install a vibration sensor 80 on each crushing roller 13. This is because the damage condition may differ among the various crushing rollers 13. Alternatively, it is also possible not to install vibration sensors 80 on each crushing roller 13, but only on a representative crushing roller 13. In this case, it is preferable to replace all roller journal bearings 59, etc., at the point when a minor abnormality is detected, thus preventing damage to the roller journal bearings 59 from affecting the overall abnormality of the mill 10 as a preventative measure.

[0141] In addition, when a roller is provided with two or more roller journal bearings 59, different specifications of bearings can be used to make the specific frequency generated when the bearing is damaged different. Based on the frequency difference detected by the vibration sensor 80, it is possible to infer which roller journal bearing 59 has been damaged.

[0142] Furthermore, in the above embodiment, a vibration sensor 80 is used to detect abnormalities in the roller journal bearing 59, but the sensor used for detecting abnormalities in the roller journal bearing 59 is not limited to a vibration sensor (accelerometer). For example, a velocity sensor, a displacement sensor, a strain gauge, or a sound sensor may also be used.

[0143] Additionally, the vibration sensor 80 can be configured to be easily replaceable. Furthermore, it is preferably configured to be temporarily removable during maintenance of the mill 10.

[0144] Furthermore, the vibration sensor 80 is preferably capable of detecting the X-axis, Y-axis, and Z-axis vibrations generated from the roller journal bearing 59 respectively (see reference). Figure 4 The vibration mode of the roller journal bearing 59 is set, but any one of them can be omitted as needed. Furthermore, in this embodiment, as described above, the X-axis direction refers to the extension direction of the journal bearing 52, the Y-axis direction refers to the vertical direction, and the Z-axis direction refers to the extension direction of the eccentric shaft 48. Additionally, the vibration sensor 80 can detect vibration in only one direction, or it can detect vibration in multiple directions as in this embodiment. If the vibration sensor 80 can detect vibration in at least two different directions, it can detect various types of vibration, thus improving the detection accuracy of abnormalities in the control unit 50. Furthermore, it is more preferable that the two different directions are orthogonal to each other.

[0145] Furthermore, when the roller journal bearing 59 typically bears the load on its lower side, i.e., the crushing section side, damage to the rolling surface is transmitted as vibration. For example, when using the vibration sensor 80, the vibration caused by the bearing damage is generated as displacement in the vertical direction. Therefore, the journal shaft 52 is transmitted as vertical vibration, and the journal head 45 is rotated 90° to transmit it as torsional vibration (vibration displaced along the X and Y axes) to the vibration sensor 80 at the front end 48a of the eccentric shaft 48, and detected. Therefore, the sensor that detects vibration in the Z-axis direction (second sensor 80b) is less important than the sensors that detect vibration in the X and Y-axis directions (first sensor 80a and third sensor 80c). Therefore, if the vibration sensor 80 is omitted, it can be omitted from the second sensor 80b first. In addition, the outputs from each sensor can be calculated separately or the values ​​can be added together midway.

[0146] Alternatively, a waterproof, dustproof, or explosion-proof cover can be provided for the vibration sensor 80. When a cover is provided, it is preferable that it does not affect signal detection.

[0147] Alternatively, the wiring from the vibration sensor 80 to the control unit 50 can be made using shielded cables, optical cables, etc., which are not easily affected by external noise.

[0148] Furthermore, the anomaly detection system can be a permanent monitoring instrument that continuously performs measurements, or it can be a point measurement system that performs measurements temporarily as needed. In the case of point measurements, it is preferable to appropriately set the timing of the measurements. For example, basic data can be obtained at the beginning of use of the roller journal bearing 59 (when it is new), and data can be obtained at a time when the remaining lifespan decreases after a certain period of use. However, in the case of point measurements, even if the condition of the roller journal bearing 59 deteriorates rapidly without measurement, it may not be detected; therefore, a permanent anomaly detection system is preferred.

[0149] Furthermore, when performing point measurements, it is preferable to implement the mill 10 under as similar operating conditions as possible (type of solid fuel used, amount of solid fuel supplied, etc.). This can suppress deviations caused by differences in the operating conditions of the mill 10 and improve the accuracy of bearing malfunction detection. Under normal circumstances, it is preferable to configure the mill 10 to automatically set an malfunction detection threshold for each operating condition by accumulating data based on each operating condition.

[0150] Furthermore, the order of signal processing performed by the control unit 50 can be appropriately changed considering the operating state of the mill 10 without deviating from the intended purpose. In addition to the processing described above, further processing can be added. For example, if the inherent vibration frequency of a component that becomes a transmission path of vibration coincides with only a specific higher harmonic component (Nth order) in the frequency of vibration generated when the roller journal bearing 59 malfunctions, processing can be implemented to exclude the signal in the frequency domain of that higher harmonic from the evaluation.

[0151] Alternatively, the threshold for determining bearing anomalies can be a standard value derived by analogy from past operating data. Alternatively, the MT method (Maharanobis Taguchi System) can be used to capture changing trends for anomaly detection. Furthermore, since the vibration signal varies depending on the operating conditions of the mill 10, it is preferable to vary the anomaly determination threshold according to the operating conditions of the mill 10.

[0152] Furthermore, if the control unit 50 determines an anomaly, the anomaly detection information can be displayed on the display device 96 of the equipment control device 94. It can also be used as a trigger to change the operating conditions of the mill 10 (e.g., reducing fuel supply), conduct detailed inspections of the roller journal bearing 59, replace it, or prepare replacement parts. Moreover, the information can be displayed not only to the equipment control device 94, but also sent to registered personal computers, smartphones, or other information terminals via email. Alternatively, it can be displayed only on-site. By making the anomaly detection system independent of the equipment control device 94, modifications to the equipment control device 94 can be omitted.

[0153] Alternatively, this system can also be used to contact the manufacturer (the maker and deliverer of the mill 10) when the control unit 50 determines an anomaly. Upon receiving an anomaly determination, the manufacturer can also make appropriate proposals to the user (the user of the mill 10) (precise diagnostics, component procurement, adjustments to the construction schedule, etc.). Furthermore, the information can be used to contact third parties other than the manufacturer and user; for example, it can be used to contact the bearing manufacturer to adjust the bearing production scope, or to contact the maintenance company to secure maintenance budgets.

[0154] [Second Implementation]

[0155] Next, a second embodiment of this disclosure will be described. In this embodiment, the control unit 50 differs from the first embodiment in that it includes a remaining life estimation system. All other aspects are the same as the first embodiment; therefore, the same reference numerals are used to label the same structures, and detailed descriptions thereof are omitted.

[0156] The remaining lifetime estimation system involved in this embodiment is configured, for example, as follows.

[0157] The control unit 50 estimates the remaining life of the roller journal bearing 59. That is, the control unit 50 functions as a system for estimating the remaining life of the roller journal bearing 59 of the crushing roller 13 that crushes solid fuel between itself and the crushing table 12. Alternatively, this function of estimating the remaining life can be implemented in a different control device than the control unit 50.

[0158] Figure 10 This diagram illustrates an example of the hardware structure of the control unit 50 according to this embodiment.

[0159] like Figure 10 As shown, the control unit 50 is a computer system, which includes, for example, a CPU 111, a ROM (Read Only Memory) 121 for storing programs executed by the CPU 111, a RAM (Random Access Memory) 130 that functions as a working area for each program execution, a hard disk drive (HDD) 140 as a mass storage device, and a communication unit 150 for connecting to a network or the like. These units are connected via a bus 180.

[0160] In addition, the control unit 50 may also include an input unit consisting of a keyboard and mouse, a display unit consisting of a liquid crystal display device for displaying data, etc.

[0161] Furthermore, the storage medium used to store programs executed by the CPU 111 is not limited to ROM 121. For example, it may be other auxiliary storage devices such as magnetic disks, optical disks, and semiconductor memories.

[0162] The series of processing steps used to implement the various functions described later are recorded in the form of a program in HDD140, etc. CPU111 reads this program into RAM130, etc., and performs information processing and calculations, thereby realizing the various functions described later. Alternatively, the program can be pre-installed in ROM121, other storage media, provided in a state stored on a computer-readable storage medium, or distributed via a wired or wireless communication unit. Computer-readable storage media include magnetic disks, optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, etc. Furthermore, HDD140 can also be replaced with a solid-state drive (SSD), etc.

[0163] Figure 11 This is a functional block diagram representing the functions of the control unit 50 related to the estimation of remaining service life. For example... Figure 11 As shown, the control unit 50 includes an acquisition unit 62 and an estimation unit 63.

[0164] The acquisition unit 62 acquires measured values ​​related to the load applied to the crushing roller 13 and measured values ​​related to the tilt angle of the crushing roller 13 relative to the crushing table 12. The acquisition unit 62 acquires measured values ​​related to the load applied to the crushing roller 13 and the tilt angle of the crushing roller 13 relative to the crushing table 12, which are important for reflecting the actual operating condition in the estimation of the remaining life of the roller journal bearing 59.

[0165] like Figure 12 As shown, the information related to the load applied to the crushing roller 13 refers to the information related to the load L2 received by the crushing roller 13 from the crushing table 12. The load L2 from the crushing table 12 refers to the force (load) received by the crushing roller 13 from the crushing table 12 as it is pressed against the solid fuel being fed to the upper surface of the crushing table 12. That is, it is the force received by the crushing roller 13 in a direction perpendicular to the closest opposing surface where the contact surface between the crushing table 12 and the crushing roller 13, or the gap between the crushing roller 13 and the crushing table 12, is set to its minimum. The load L2 from the crushing table 12 acts along an axis AX1 parallel to the rotation axis of the crushing table 12 (e.g., in the direction of the rotation axis). Furthermore, Figure 12 The shape of the crushing table 12 is an example, and is not limited to that shape.

[0166] In this embodiment, information related to the load applied to the crushing roller 13 will be described regarding the additional load of the pressing device 46 (the pressing force applied to the crushing table 12 by the solid fuel crushed by the crushing roller 13), namely the hydraulic load L1 of the hydraulic load unit 54. The hydraulic load (additional load) L1 is a parameter controlled when pressing the crushing roller 13 against the crushing table 12; its measured value is obtained by a sensor and output to the acquisition unit 62. The sensor can be, for example, a pressure sensor such as a force sensor or a pressure sensor. Furthermore, as information related to the load applied to the crushing roller 13, any parameter related to the load applied to the crushing roller 13 is not limited to the hydraulic load (additional load) L1 and can be applied. For example, the load applied to the crushing roller 13 or the load applied to the roller journal bearing 59 can also be directly measured and obtained by a sensor.

[0167] like Figure 13 (As shown in the enlarged longitudinal sectional view indicating the roller tilt angle), the information related to the tilt angle of the crushing roller 13 relative to the crushing table 12 refers to the information related to the roller tilt angle θ. The roller tilt angle θ refers to the tilt of the crushing roller 13 relative to the crushing table 12, which is the angle formed by the axis AX1 (or the axis parallel to the rotation axis) of the crushing table 12 and the axis (vertical plane) AX3 (perpendicular to the rotation axis AX2) of the crushing roller 13.

[0168] In this embodiment, the lift amount X of the crushing roller 13 is used as information related to the tilt angle of the crushing roller 13 relative to the crushing table 12. The lift amount X of the crushing roller 13 refers to the distance between the crushing table 12 and the crushing roller 13. The lift amount X is the distance generated due to the presence of pulverized solid fuel between the crushing table 12 and the crushing roller 13. Since the crushing roller 13 rotates around the eccentric shaft 48, the lift amount X becomes the distance between the crushing table 12 and the crushing roller 13 when the crushing roller 13 moves up and down relative to the eccentric shaft 48. In this embodiment, for example by... Figure 15 Such a gap sensor obtains the lift amount X. The lift amount X can also be a linear motion sensor, an electrostatic capacitive distance sensor, a laser distance sensor, etc. Figure 7 In this configuration, a measuring rod 71 and a gap sensor 72 are positioned relative to the eccentric shaft 48. The measuring rod 71 rotates with the rotation of the eccentric shaft 48 (and the rotation of the crushing roller 13). The gap sensor 72 is fixed in position, and the distance between the gap sensor 72 and the measuring rod 71 is measured. Figure 14 and Figure 15 In the process, the ratio of the distance L between the central axis (AX3) of the crushing roller 13 and the eccentric shaft 48 to the lift X is equal to the ratio of the length l of the measuring rod 71 on the gap sensor 72 to the gap value x. Therefore, the lift X can be calculated using the gap sensor 72 by the following equation (1).

[0169] [Formula 1]

[0170] Furthermore, in equation (1), L and l are design values, and x can be obtained by the gap sensor 72, so the lift amount X can be calculated. In addition, the lift amount X can be calculated based on the amount of action of the pressing device 46, such as the amount of movement of the intermediate piston 53. If the lift amount X can be measured directly, then the lift amount X can also be measured.

[0171] In the acquisition unit 62, the lift amount X and the output of the gap sensor 72, i.e., the gap value x, can be acquired. In addition, by limiting the movement of the crushing roller 13 by the protrusion 57 and the stop member 58, when there is a gap between the crushing roller 13 and the crushing table 12, the 0 (zero) point of the gap value x can be placed as the point where the gap between the crushing roller 13 and the crushing table 12 is the smallest. Similarly, the 0 (zero) point of the gap value x of the gap sensor 72 can be placed as the point where the distance between the gap sensor 72 and the measuring rod 71 is the smallest.

[0172] Furthermore, in this embodiment, the lift amount X of the crushing roller 13 is used as information related to the tilt angle of the crushing roller 13 relative to the crushing table 12. However, any information related to the roller tilt angle θ is not limited to the lift amount X of the crushing roller 13. Alternatively, the roller tilt angle θ can be directly measured and obtained using a sensor or the like. Additionally, as described later, in this embodiment, the roller tilt angle θ is calculated based on the lift amount X of the crushing roller 13, and the thrust load Ls and radial load Lr are calculated and used for remaining life estimation. However, if the lift amount X of the crushing roller 13 is obtained, the thrust load Ls and radial load Lr can be calculated and the remaining life estimated without calculating the roller tilt angle θ. In this case, the acquisition unit 62 acquires measured values ​​of information related to the load applied to the crushing roller 13 and measured values ​​of information related to the lift amount X of the crushing roller 13 relative to the crushing table 12. Information relating to the lift X of the crushing roller 13 relative to the crushing table 12 is not limited to the lift X and can be used as long as it relates to the lift X.

[0173] The estimation unit 63 estimates the remaining life of the roller journal bearing 59 based on the information obtained in the acquisition unit 62. Specifically, the estimation unit 63 calculates the radial load Lr and thrust load Ls loaded on the roller journal bearing 59, and estimates the remaining life of the roller journal bearing 59 based on the radial load Lr and thrust load Ls.

[0174] Figure 12 This is a diagram (partial enlarged longitudinal sectional view) showing the relationship between the loads around the crushing roller 13. For example... Figure 12As shown, since the crushing roller 13 is pressed against the crushing table 12 by the hydraulic load L1, the load L2 from the crushing table 12 is applied to the crushing roller 13. There may also be pulverized solid fuel between the crushing roller 13 and the crushing table 12. Furthermore, the load L2 from the crushing table 12 is applied to the roller journal bearing 59 via the crushing roller 13. By decomposing the load L2 on the roller journal bearing 59 into radial and thrust components, the radial load Lr and thrust load Ls in the roller journal bearing 59 can be calculated. In the estimation section 63, the remaining life of the roller journal bearing 59 is estimated using the radial load Lr and thrust load Ls. Furthermore, known methods can be used to estimate the life of the roller journal bearing 59 using the radial load Lr and thrust load Ls.

[0175] Specifically, the hydraulic load L1 and lift X obtained in the acquisition unit 62 are input to the estimation unit 63. Alternatively, the clearance value x can be input to the estimation unit 63, and the lift X is calculated using the above calculations. In the estimation unit 63, the load L2 received by the roller journal bearing 59 from the crushing table 12 is calculated based on the input hydraulic load L1. In the crushing roller 13, since it is pressed towards the crushing table 12 via the crushed solid fuel based on the hydraulic load L1, the hydraulic load L1 is related to the load L2 from the crushing table 12. Therefore, in the estimation unit 63, the load L2 from the crushing table 12 can be calculated based on the hydraulic load L1. Furthermore, if the load L2 from the crushing table 12 can be directly obtained in the acquisition unit 62 using a measuring instrument with various sensors, the obtained load L2 from the crushing table 12 can also be used. In addition, when calculating load L2 based on hydraulic load L1, the load generated by the weight of the crushing roller 13 and the components supporting the crushing roller 13 can also be considered, in addition to the hydraulic load L1.

[0176] Then, in the estimation section 63, the roller tilt angle θ is calculated based on the input lift amount X. The roller tilt angle θ is calculated by the following equation (2).

[0177] [Formula 2]

[0178] like Figure 13 As shown, in equation (2), θ0 is the roller tilt reference angle, which is the roller tilt angle θ when the lift X is 0 (zero) (i.e., when the crushing roller 13 is in contact with the crushing table 12, or when the gap between the crushing roller 13 and the crushing table 12 is at its minimum). Furthermore, Δθ is the change in roller tilt angle θ relative to the roller tilt reference angle, and Δθ becomes the value of the arctangent function of the ratio of lift X to distance L. That is, when the lift X is small, the roller tilt angle θ increases, and when the lift X increases, the roller tilt angle θ decreases.

[0179] Thus, in the estimation section 63, if the load L2 from the crushing table 12 and the roller tilt angle θ are calculated, then as follows Figure 14 In the same manner, the thrust load Ls and radial load Lr are calculated. The thrust load Ls is calculated by multiplying the load from the crushing table 12 by sin(θ), and the radial load Lr is calculated by multiplying the load from the crushing table 12 by cos(θ).

[0180] Thus, in the estimation section 63, the thrust load Ls and radial load Lr applied to the roller journal bearing 59 are calculated, and the remaining life is estimated based on the thrust load Ls and radial load Lr. Regarding the method for estimating the remaining life, various methods can be applied as long as they are based on the thrust load Ls and radial load Lr.

[0181] Next, refer to Figure 16 An example of the remaining life estimation process for the aforementioned control unit 50 will be described. Figure 16 This is a flowchart illustrating an example of the steps involved in the remaining lifetime estimation process according to this embodiment. Figure 16 The process shown is executed, for example, when an operator or other person gives a start instruction for estimating the remaining useful life. Alternatively, the remaining useful life estimation process can also be executed periodically without a start instruction from an operator or other person.

[0182] First, obtain the measured values ​​of hydraulic load L1 and lift X (S101).

[0183] Next, the roller tilt angle θ (S102) is calculated based on the lift amount X.

[0184] Next, the radial load Lr and thrust load Ls (S103) on the roller journal bearing 59 are calculated.

[0185] Next, the remaining life of the roller journal bearing 59 is estimated using the radial load Lr and the thrust load Ls (S104). In addition, regarding the estimation of the remaining life, information other than the radial load Lr and the thrust load Ls (such as the design value of the roller journal bearing 59) can be used according to the estimation method.

[0186] Next, refer to Figure 17 The effects of the above-mentioned remaining life estimation treatment are explained. Figure 17 This indicates the variation of the load on the power generation equipment and the load applied to the journal bearings relative to operating time, as well as the variation of the remaining life relative to operating time. Figure 17 In the example shown, the remaining life is estimated by continuously applying the maximum load as the design value.

[0187] In the reference example, it is assumed that when the load of the power generation equipment 1 is operating at its rated load (e.g., 100% load), the load applied to the roller journal bearing 59, proportional to the load of the power generation equipment 1, also becomes maximum. Therefore, the remaining life decreases linearly with respect to operating time, presumably at... Figure 17 The operating time T2 in the data is the period that requires maintenance.

[0188] In contrast, in this embodiment, by sequentially measuring the hydraulic load L1 applied to the crushing roller 13, it is possible to obtain the load applied to the roller journal bearing 59 that corresponds to the actual operating state of the power generation device 1. Figure 17 As shown in the line graph, the actual load applied to the roller journal bearing 59 can be lower than the maximum load. Therefore, when estimating the remaining life by considering the measured value of the roller tilt angle θ, the decrease in remaining life relative to operating time becomes more gradual compared to the reference example. In particular, in Figure 17 During the period Ta, the load applied to the roller journal bearing 59 is lower, thus reducing the remaining life consumption. Furthermore, the period Ta varies depending on the operating conditions and is therefore not limited to a specific timeframe. Figure 17 The period shown.

[0189] For example, in Figure 17 When the current location is set as the operating time T1, the operating time T3 can also be estimated by linearly extending the remaining lifespan of the predetermined period from the current point in time.

[0190] Based on the remaining life estimation of this embodiment, the remaining life of the roller journal bearing 59 can be estimated with higher accuracy according to the actual operating conditions. Therefore, compared with the reference example, a more accurate maintenance necessity period (operating time T2 < T3) can be estimated, and the mill 10 can be used more efficiently.

[0191] In this embodiment, the remaining lifespan is estimated using the measured values ​​of the hydraulic load L1 and the lift X. However, the remaining lifespan can also be estimated using the measured value of the rotational speed of the roller journal bearing 59 (the rotational speed of the crushing roller 13). In this case, the acquisition unit 62 acquires the measured value of information related to the rotational speed of the roller journal bearing 59, and the estimation unit 63 also estimates the remaining lifespan by considering the measured value of information related to the rotational speed of the roller journal bearing 59. For example, if slippage occurs relative to the crushed solid fuel crushing roller 13 on the crushing table 12, the rotational speed of the roller journal bearing 59 may decrease or stop. Therefore, a rotational speed sensor that detects the actual rotational speed of the roller journal bearing 59 can be provided, and the actual measured value of the rotational speed can be considered when estimating the remaining lifespan. By considering the measured value of the rotational speed of the roller journal bearing 59, the estimation accuracy can be further improved compared to estimating the remaining lifespan by assuming the rotational speed of the roller journal bearing 59 to be constant. As sensors, in addition to rotary position sensors such as rotary encoders, rotary speed sensors, sensors that capture changes in the direction of gravity, and acceleration sensors that detect centrifugal force can also be used. Furthermore, as a method for transmitting the measured information to the outside of the mill 10, it can be transmitted via a wired communication unit, or alternatively, via a wireless communication unit.

[0192] In this embodiment, the remaining life is estimated using the measured values ​​of the hydraulic load L1 and the lift X, but the remaining life can also be estimated using the state of the lubricant in the roller journal bearing 59. In this case, the acquisition unit 62 acquires the measured values ​​of information related to the state of the lubricant in the roller journal bearing 59, and the estimation unit 63 also considers the measured values ​​of information related to the state of the lubricant in the roller journal bearing 59 to estimate the remaining life. For example, when fine particles of pulverized solid fuel are mixed into the lubricating oil in the roller journal bearing 59 housing of the pulverizing roller 13, the life of the roller journal bearing 59 is sometimes extremely short. Therefore, as for the state of the lubricant, for example, a sensor that detects the state of the lubricating oil (contamination, deterioration, etc.) can be installed in the roller journal bearing 59 housing, and the influence from the state of the lubricating oil can be considered when estimating the remaining life. By also considering the state of the lubricant, the accuracy of the remaining life estimation can be further improved. Most of the contamination of the lubricant is caused by fouling of the sealing part (oil seal part) of the pulverizing roller 13 due to the intrusion of fine particles of pulverized solid fuel. Furthermore, since insufficient sealing air pressure is a common cause of microparticle intrusion, a sensor that detects changes in sealing air pressure can be installed to account for the impact of insufficient sealing air pressure when estimating the remaining lifespan.

[0193] As explained above, according to the remaining life estimation system, solid fuel pulverizing apparatus, remaining life estimation method, and remaining life estimation procedure involved in this embodiment, information related to the load applied to the pulverizing roller 13 and information related to the tilt angle of the pulverizing roller 13 relative to the pulverizing table 12 are obtained as measured values, and the remaining life of the roller journal bearing 59 is estimated. Therefore, for changes in the operating state of the mill 10 equipped with the pulverizing roller 13, a response that takes into account the impact on the remaining life estimation can be made, and the estimation accuracy of the remaining life can be improved. In addition, based on the lift X of the pulverizing roller 13 relative to the pulverizing table 12, the direction of the load applied to the roller journal bearing 59 can be estimated, and therefore the remaining life of the roller journal bearing 59 can be estimated using the lift X of the pulverizing roller 13.

[0194] Furthermore, by more accurately estimating the remaining lifespan, maintenance (replacement, etc.) of the roller journal bearing 59 can be performed at more appropriate intervals. That is, the roller journal bearing 59 can be used for a longer period, thus reducing the maintenance frequency of the mill 10. Therefore, maintenance costs can be reduced. In addition, the operating rate of the mill 10 and the power generation equipment 1 can be improved.

[0195] [Variation Example 1]

[0196] Next, the remaining life estimation system, solid fuel pulverizing apparatus, remaining life estimation method, and remaining life estimation procedure involved in the variations of the second embodiment of this disclosure will be described.

[0197] In this variation, the future change in remaining life is estimated. Hereinafter, the differences between the remaining life estimation system, solid fuel pulverizing apparatus, remaining life estimation method, and remaining life estimation procedure involved in this variation and the second embodiment will be explained.

[0198] In the control unit 50 of this modified example, such as Figure 18 As shown, it has a prediction unit 64.

[0199] The prediction unit 64, based on a database containing pre-accumulated operating states of the mill 10 and the remaining life progression characteristics corresponding to those operating states, predicts the future progression of the remaining life based on the progression of the remaining life estimated in the estimation unit 63. The remaining life estimation characteristics refer to information representing the characteristics of the remaining life progressing according to the operating states; specifically, they are... Figure 19The curve characteristics shown in A, B, and C (or a straight line) are valid. That is, the database stores past or present operating information of the mill 10. The database can store past or present operating data of the mill 10 with an estimated lifespan, as well as past operating data of other mills 10 with similar structures. Furthermore, not only actual operating data, but also virtually simulated data can be stored in the database. The database can be located in the control unit 50 (storage unit) or in other devices. The operating status includes at least one of the following: the type of solid fuel (coal type information), the amount of solid fuel supplied (coal supply), information related to the load applied to the crushing roller 13 (hydraulic load), the rotational speed of the classifier (rotary classifier 16) installed in the mill 10 (classifier speed), and the differential pressure between the gas flowing into and out of the mill 10 (the differential pressure within the mill 10 is an indicator of the load condition of the mill 10; for example, it is generated between the upper and lower environments of the crushing table 12). Furthermore, as for operating conditions, any parameter that affects the lifespan of the roller journal bearing 59 is not limited to the parameters mentioned above and is included in the operating conditions. Alternatively, under similar operating conditions, if the change in remaining lifespan relative to operating time is consistent within ±10%, and more preferably within ±5%, except for operating information (estimated remaining lifespan) that is clearly determined to be unexpected, then the data under similar operating conditions are given higher priority and determined to be similar.

[0200] Specifically, the prediction unit 64 refers to a database, selects data on operating states similar to the operating state of the mill 10, which is the object of remaining life estimation, and selects and obtains the remaining life progression characteristics corresponding to the data on similar operating states. Data on similar operating states refers to data on operating states that are estimated to have a similar degree of influence on remaining life relative to the operating state of the mill 10, which is the object of remaining life estimation. For example, when using the type of solid fuel as the operating state, the operating state includes those that are considered to affect similar solid fuels from the perspective of the degree of influence on remaining life, relative to the solid fuel of the mill 10, which is the object of remaining life estimation. Furthermore, among the parameters of the operating state, a priority order for similar judgments can be set, and similar judgments can be performed on parameters with higher priority (such as the type of solid fuel).

[0201] Figure 19 This is an example of the remaining life progression characteristics of a mill 10 operating under similar conditions, which is the object of the remaining life estimation. Figure 19 In the example, examples of selected characteristics A, B, and C are shown as characteristics of remaining lifetime over time. Furthermore, in... Figure 19The table shows the estimated results of the remaining life of the mill 10, which is the object of the remaining life estimation, namely E1 (first estimation result), E2 (second estimation result), and En (nth estimation result).

[0202] The prediction unit 64 determines, from the selected remaining life shift characteristics (A, B, C), a remaining life shift characteristic (A, B, C) that has a similar shift characteristic to shift characteristic E, which is based on the estimation results E1 to En of the estimation results for the remaining life of the mill 10, which is the object of the remaining life estimation. Figure 19 In the example, the transition characteristic from E1 to En is similar to characteristic B, and is therefore identified as characteristic B. Thus, the mill 10, which is the object of the remaining life estimation, is estimated to reach its lifespan Tb in the future, with a remaining life characteristic relative to operating time, similar to characteristic B. By referencing the transition characteristic E to a database of past or present data, the operating state of the mill 10 can also be considered to predict the future remaining life transition, thus enabling a more accurate estimation of the remaining life. The transition characteristic E for the estimated remaining life of the mill 10, which is the object of the remaining life estimation, can be set as the transition characteristic from the time of completion to the present, or as the transition characteristic for a predetermined period in the past from the present, or even as a period of significant change in operating state (e.g., a change in the type of solid fuel).

[0203] In addition, such as Figure 19 As in the example, even if the trend characteristic of the estimated remaining life of the mill 10, which is the object of the remaining life estimation, does not completely correspond to the selected remaining life trend characteristic, it is sufficient to select a similar trend characteristic from the selected remaining life trend characteristics. Furthermore, if a trend characteristic similar to the trend characteristic of the estimated remaining life of the mill 10, which is the object of the remaining life estimation, is not found in the past or present database, prediction can still be made based on the selected remaining life trend characteristic. For example, in Figure 19 In this case, if the ratio of the estimated remaining life of the mill 10, which is the object of the remaining life estimation, to the ratio of the difference with characteristic A to the difference with characteristic B is between characteristic A and characteristic B, then the future remaining life of the mill 10, which is the object of the remaining life estimation, can also be predicted based on characteristic A and characteristic B. In this case, for example, a median line between characteristic A and characteristic B is generated using a proportional distribution ratio of the difference with characteristic A to the difference with characteristic B, and the remaining life prediction is performed.

[0204] Furthermore, the processing performed by the prediction unit 64 (selection of similar operating states in the database, selection of remaining life progression characteristics among the selected remaining life progression characteristics that have progression characteristics similar to the progression characteristics of the remaining life estimation result for the mill 10 which is the object of remaining life estimation, and prediction of future remaining life progression based on the selected remaining life progression characteristics) can be processed by a pre-set algorithm or appropriately processed using AI.

[0205] As explained above, according to the remaining life estimation system, solid fuel pulverizing apparatus, remaining life estimation method, and remaining life estimation procedure involved in this embodiment, by establishing a database corresponding to the operating state and remaining life shift characteristics, the future remaining life can be predicted based on the remaining life shift estimated in the estimation unit 63. This allows for more accurate prediction of the future remaining life, enabling more appropriate timing for maintenance (replacement, etc.) of the roller journal bearing 59. In other words, the roller journal bearing 59 can be used for a longer period, thus reducing the maintenance frequency of the mill 10. Therefore, maintenance costs can be reduced. Furthermore, the operating rate of the mill 10 and the power generation equipment 1 can be improved.

[0206] [Variation Example 2]

[0207] Next, the remaining life estimation system, solid fuel pulverizing apparatus, remaining life estimation method, and remaining life estimation procedure involved in the variations of the second embodiment of this disclosure will be described.

[0208] In this variation, a maintenance plan is created based on the estimated remaining lifespan. Hereinafter, the differences between the remaining lifespan estimation system, solid fuel pulverizer, remaining lifespan estimation method, and remaining lifespan estimation procedure involved in this variation and those of the second embodiment and its variation 1 will be explained.

[0209] In the control unit 50 of this modified example, such as Figure 20 As shown, it has a planning department of 65.

[0210] The planning unit 65 formulates a maintenance plan based on the estimated remaining lifespan. Specifically, based on the remaining lifespan estimated in the estimation unit 63 or the remaining lifespan estimated in the prediction unit 64, the planning unit 65 determines at what point in the lifespan will be completely exhausted and formulates a maintenance plan. In addition, as mentioned above, the remaining lifespan can be estimated more accurately, so a plan can be formulated with an appropriate margin before the lifespan is completely exhausted.

[0211] In the planning section 65, for example, a maintenance plan is made before a predetermined period for the estimated end of the service life. The predetermined period is set, for example, based on the time required for maintenance, such as the preparation and replacement of the roller journal bearing 59, in order to carry out maintenance in a safe and efficient manner. The maintenance plan includes, for example, at least one of the following: maintenance period, operation plan for adjusting the maintenance period, and load sharing adjustment among multiple mills 10.

[0212] The maintenance period refers to the recommended period (time when the roller journal bearing 59 should be replaced) based on the estimated remaining lifespan. For example, the maintenance period is set with a predetermined margin for the estimated lifespan.

[0213] The operation plan used to adjust the maintenance period refers to the operation plan for the mill 10, used to adjust the maintenance period. For example, if the maintenance period has been set but is later than the estimated end of the service life, an operation plan is planned to extend the service life. Specifically, this may involve changing the type of solid fuel or moderately pulverizing the solid fuel. By making the operation appropriate, the service life can be extended in a safer and more efficient process, and maintenance can be performed at the appropriate time. In addition, if the pre-set maintenance period is before the estimated end of the service life, an operation plan that increases the load can be planned to ensure that the remaining service life margin does not increase, thereby effectively utilizing the remaining service life.

[0214] Load sharing adjustment among multiple mills 10 refers to appropriately adjusting the load sharing among multiple mills 10. For example, to ensure that the maintenance periods of multiple mills 10 are consistent or that the maintenance intervals are set in stages (e.g., the maintenance intervals are evenly spaced among multiple mills 10), the load sharing of each mill 10 is planned for adjustment. For example, if one mill 10 reaches its lifespan earlier than the others, the load on that mill 10 can be reduced, increasing the load on the other mills 10 to make them more burdened, thereby adjusting the load sharing to ensure that the lifespans of the multiple mills 10 reach their end points at the same time.

[0215] Figure 21 This is an example of a system involved in the maintenance plan. For example... Figure 21 Thus, on the user side, the estimated remaining lifespan information of the mill 10 is collected in the information collection system 101. The server 102 on the equipment manufacturer's side retrieves the information collected in the collection system, and the planning system 103 performs planning and provides recommendations to the user. Additionally, in Figure 21 The example shown is of the planning unit 65 being installed on the device manufacturer's side as a planning system 103, but it can also be installed on the user's solid fuel pulverizing device side.

[0216] As explained above, according to the remaining life estimation system, solid fuel pulverizing apparatus, remaining life estimation method, and remaining life estimation procedure involved in this embodiment, maintenance plans can be formulated with leeway during the set maintenance periods by making maintenance plans based on the estimated remaining life. Therefore, the operating rate of the mill 10 and the power generation equipment 1 can be improved.

[0217] Next, use Figure 22 An example of a method for using an anomaly detection system and a remaining life estimation system for a roller journal bearing 59 is described.

[0218] Figure 22 This indicates the estimated remaining life and degree of abnormality (progress of damage) of the roller journal bearing 59 over time. The dashed line represents the progression of the remaining life of the roller journal bearing 59 calculated using a set load. The solid line represents the progression of the remaining life calculated based on the actual load in the remaining life estimation system. The dashed line represents the magnitude of the abnormal signal (a signal at an abnormal bearing frequency within a predetermined frequency range) detected by the anomaly detection system. t1 indicates that the remaining life calculated using the set load is zero (i.e., the design life). The difference between the remaining life estimated at t1 and the remaining life calculated from the actual load (the difference in remaining life D) represents the margin relative to the case where the bearing is replaced within the design life. t3 is the time when the roller journal bearing 59 becomes unusable due to damage; that is, it represents the actual life. t2 is the replacement time derived from the detection results of the anomaly detection system.

[0219] In this way, by using both the anomaly detection system and the remaining life estimation system, the roller journal bearing 59 can continue to be used even in areas with less margin, compared to the case where only the remaining life estimation system is used.

[0220] According to this embodiment, the following effects are achieved.

[0221] Generally, while an anomaly detection system can detect an increase in the vibration of the roller journal bearing 59, it may be difficult to determine the precise threshold at which the roller journal bearing 59 becomes unusable unless it is tested in actual equipment until the roller journal bearing 59 becomes unusable, thus failing to confirm the progression of the signal until it becomes unusable. However, conducting tests in actual equipment until the bearing is damaged requires a long period of time. Therefore, it is difficult to extend the life of the roller journal bearing 59 solely through an anomaly detection system.

[0222] On the other hand, as in this embodiment, by using both the anomaly detection system and the remaining life estimation system for the roller journal bearing 59, stable life consumption is achieved using the remaining life estimation system, and anomaly detection is achieved using the anomaly detection system. This allows for monitoring of the roller journal bearing 59. Therefore, the reliability of the roller journal bearing 59 can be ensured, and its lifespan extended.

[0223] In detail, as described above, the remaining life estimation system evaluates the remaining life of the roller journal bearing 59 based on the operating information of the crushing roller 13 (e.g., the load acting on the crushing roller 13, the rotational speed of the crushing roller 13). That is, it visualizes the "fatigue life" of the roller journal bearing 59. This is an evaluation of the "calculated life of the roller journal bearing 59".

[0224] However, the actual lifespan of the roller journal bearing 59 includes not only fatigue life but also many other factors. For example, damage to the rolling surface caused by contaminants in the lubricating oil can contribute to the lifespan of the roller journal bearing 59.

[0225] On the other hand, the anomaly detection system indirectly detects damage to the rolling surface of the roller journal bearing 59 that occurs over time due to use, for example, through vibration. That is, the anomaly detection system evaluates the actual life of the roller journal bearing 59, relative to the calculated life of the remaining life estimation system.

[0226] By using both methods, in addition to the calculated "fatigue life," it is possible to evaluate the life of the roller journal bearing 59, taking into account "effects other than fatigue life" caused by factors such as contaminants in the lubricating oil. Furthermore, since fatigue life can be evaluated using both methods, more precise maintenance of the roller journal bearing 59 is possible.

[0227] Furthermore, by evaluating both, discrepancies may arise between the calculated lifespan based on lifespan monitoring and the actual lifespan based on anomaly detection. In such cases, for example, situations may arise where the actual lifespan precedes the calculated lifespan, or where factors other than fatigue life become dominant. For instance, the results can be reflected in maintenance policies by increasing the frequency of lubricant changes, altering oil viscosity, or reducing contaminants.

[0228] Furthermore, this disclosure is not limited to the above-described embodiments, and appropriate modifications can be made without departing from its spirit.

[0229] The solid fuels used are not limited to those disclosed herein, and can include coal, biomass fuels, petroleum coke (PC), etc. Moreover, these solid fuels can be used in combination.

[0230] The anomaly detection system, solid fuel pulverizing device, and anomaly detection method described in the above-described embodiments are, for example, as follows.

[0231] One aspect of the present disclosure relates to an anomaly detection system for a roller journal bearing (59), which supports a rotatable crushing roller (13) housed inside a housing (11) constituting the outer shell of a solid fuel crushing device (100) and crushes solid fuel between the crushing roller (13) and the crushing worktable (12). The anomaly detection system comprises: a detection unit (80), a mounting portion (48a) provided on a support portion (45) located outside the housing (11), the support portion (45) supporting the crushing roller (13) via the roller journal bearing (59) and mounted on the housing (11), the detection unit (80) detecting information generated in the support portion (45) due to the rotation of the crushing roller (13); and a detection unit (50) detecting anomalies in the roller journal bearing (59) based on the information detected by the detection unit (80).

[0232] In the above structure, the detection unit is located within the support section. Therefore, compared to the case where the detection unit is located inside the grinding roller, vibrations generated by the grinding roller are less likely to be transmitted to the detection unit. Thus, malfunctions of the detection unit caused by vibrations of the grinding roller can be suppressed. Furthermore, the detection unit is located in a section of the support section situated outside the housing. Therefore, the detection unit is less susceptible to the influence of high-temperature gases (such as air) within the mill housing, thus suppressing the occurrence of malfunctions. In this way, the detection unit is less prone to failure, thereby improving its reliability.

[0233] Furthermore, the detection unit is located in a mounting section on the outside of the housing within the support unit. This allows access to the detection unit without stopping the operation of the solid fuel pulverizer or disassembling the housing or pulverizing rollers. Therefore, in cases where the detection unit needs replacement due to malfunction or maintenance, or when adding sensors to an existing solid fuel pulverizer, the replacement or addition of the detection unit is simplified. Moreover, the solid fuel pulverizer can be operated even during replacement or addition operations, thus improving operating efficiency.

[0234] In addition, in one aspect of the present disclosure, the detection unit (80) detects the vibration information of the support unit (45), and the detection unit (50) detects the abnormality of the roller journal bearing (59) based on the vibration information detected by the detection unit (80).

[0235] In the above structure, the detection unit detects abnormalities in the roller journal bearing based on the vibration detected by the sensing unit. When the crushing roller crushes solid fuel, the crushing roller vibrates. The vibration generated by the crushing roller is transmitted from the crushing roller to the support unit via the roller journal bearing. Therefore, when an abnormality occurs in the roller journal bearing, the vibration transmitted to the support unit changes. Thus, the abnormality in the roller journal bearing can be detected.

[0236] In addition, one method of the present disclosure involves an anomaly detection system that detects vibration information in multiple directions.

[0237] The above structure can detect various types of vibration, thus improving the detection accuracy of abnormalities in the roller journal bearing in the detection unit.

[0238] In addition, in one aspect of the anomaly detection system disclosed herein, the detection unit (50) performs the following processing: for the vibration information detected by the detection unit (80), removes components having the frequency of vibration generated when the crushing roller (13) crushes the solid fuel and / or components having the inherent vibration frequency of the transmission path from the roller journal bearing (59) to the detection unit (80).

[0239] The vibration frequency generated when the crushing roller crushes solid fuel, and the inherent vibration frequency of the transmission path from the roller journal bearing to the detection unit, do not change according to the condition of the roller journal bearing (normal or abnormal). In the above structure, such vibration frequencies that do not change according to the condition of the roller journal bearing are eliminated. Therefore, the accuracy of detecting abnormalities in the roller journal bearing can be improved.

[0240] In addition, in one aspect of the anomaly detection system disclosed herein, the detection unit (50) performs processing to calculate the signal magnitude for each frequency based on the vibration information detected by the detection unit (80).

[0241] In the above structure, the detection unit processes the vibration information detected by the sensing unit, organizing the signal magnitude according to each frequency. This allows for more accurate detection of abnormalities in the roller journal bearing.

[0242] In addition, in one aspect of the present disclosure, the detection unit (50) detects the degree of progression of the abnormality of the roller journal bearing (59) based on the vibration information detected by the detection unit (80).

[0243] In the above structure, the detection unit detects the degree of progression of the abnormality in the roller journal bearing based on the vibration information detected by the sensing unit. When the abnormality (e.g., damage) of the roller journal bearing progresses, the vibration of the support changes. Therefore, the detection unit is able to detect the degree of progression of the abnormality in the roller journal bearing.

[0244] In addition, one aspect of the solid fuel pulverizing apparatus disclosed herein includes: a housing (11) forming an outer shell; a pulverizing worktable (12) housed inside the housing (11); a pulverizing roller (13) housed inside the housing (11) for pulverizing solid fuel between the pulverizing roller (13) and the pulverizing worktable (12); a support (45) mounted on the housing (11) for supporting the pulverizing roller (13); a roller journal bearing (59) for supporting the pulverizing roller (13) in a manner that allows it to rotate freely relative to the support (45); and an anomaly detection system as described in any of the above.

[0245] In addition, in one aspect of the solid fuel pulverizing apparatus disclosed herein, the support portion (45) is connected to the roller journal bearing (59) in a manner that does not move relative to each other, and the support portion (45) is connected to the detection portion (80) in a manner that does not move relative to each other.

[0246] In the above structure, the support portion and the roller journal bearing are engaged in a manner that prevents relative movement. Furthermore, the support portion and the detection portion are engaged in a manner that prevents relative movement. Therefore, the information from the roller journal bearing is less likely to change at both the engagement portion between the support portion and the roller journal bearing and the engagement portion between the support portion and the detection portion. Thus, the detection portion can appropriately detect information about the roller journal bearing. Consequently, abnormalities in the roller journal bearing can be detected more accurately.

[0247] Alternatively, the support and the roller journal bearing can be joined in a non-moving manner, for example, by hot pressing or pressing. Similarly, the support and the detection part can be joined in a non-moving manner, for example, by bolts. "Joining in a non-moving manner" means that the vibration of the roller journal bearing is engaged to a degree that allows it to be appropriately detected by the detection part provided on the support, although slight relative movement is permissible.

[0248] In addition, one aspect of the solid fuel pulverizing apparatus disclosed herein includes: an anomaly detection system as described in any of the preceding claims; and a remaining life estimation system, which estimates the remaining life of the roller journal bearing based on the operating information of the pulverizing roller, wherein the solid fuel pulverizing apparatus estimates the remaining life of the roller journal bearing based on the information derived from the anomaly detection system and the information derived from the remaining life estimation system.

[0249] As described above, by using both an anomaly detection system and a remaining life estimation system for the roller journal bearing, stable life consumption can be monitored by the remaining life estimation system, and anomaly detection can be performed on the roller journal bearing. This ensures the reliability of the roller journal bearing and extends its lifespan.

[0250] In addition, one aspect of the present disclosure relates to an anomaly detection method for a roller journal bearing (59), wherein the roller journal bearing (59) supports a rotatable crushing roller (13), the crushing roller (13) is housed inside a housing (11) constituting the outer shell, and crushes solid fuel between the crushing roller (13) and the crushing worktable (12). The anomaly detection method comprises the following steps: a detection step, wherein a detection unit (80) detects information generated in the support unit (45) due to the rotation of the crushing roller (13), the detection unit (80) being provided in a setting part (48a) of the support unit (45) located outside the housing (11), the support unit (45) being supported by the roller journal bearing (59) and the crushing roller (13) being mounted on the housing (11); and a detection step, wherein an anomaly of the roller journal bearing (59) is detected based on the information detected by the detection unit (80).

[0251] Explanation of reference numerals in the attached figures

[0252] 1. Power generation equipment

[0253] 10. Mill (Grinding Section)

[0254] 11. Shell

[0255] 12 Crushing Table

[0256] 13 Crushing Rollers

[0257] 14. Reducer (drive transmission unit)

[0258] 15. Mill motor (drive unit)

[0259] 16. Rotary classifier (classification section)

[0260] 16a blade

[0261] 17 Coal Supply Pipeline (Fuel Supply Department)

[0262] 18 Classifier Motor

[0263] 19 Export Ports

[0264] 21. Storage Warehouse

[0265] 22. Blanking Section

[0266] 25. Coal feeder (fuel supply machine)

[0267] 26. Conveying Department

[0268] 27 Coal feeder motor

[0269] 30. Air Supply Department (Gas Supply Department for Transportation)

[0270] 30a Hot airflow path

[0271] 30b Cold airflow path

[0272] 30°C Hot air damper

[0273] 30d air conditioning damper

[0274] 31 Primary Air Ventilation Fan (PAF)

[0275] 32. Forced ventilator (FDF)

[0276] 33 Induction Ventilation Fan (IDF)

[0277] 34 Air preheater (heat exchanger)

[0278] 40. Status detection unit (temperature detection unit, differential pressure detection unit)

[0279] 41 Bottom surface

[0280] 42 Top

[0281] 45. Journal head (support part)

[0282] 46 Pressing device (crushing load application part)

[0283] 47 Support Arm

[0284] 48 Eccentric Shaft

[0285] 48a Front end (installation part)

[0286] 50. Control Department (Inspection Department)

[0287] 51 Wheel

[0288] 52 journal shaft

[0289] 53 Intermediate Piston

[0290] 54 Hydraulic Load Unit

[0291] 56 main body

[0292] 57. Protrusion

[0293] 58 Stopping components

[0294] 59. Journal bearing (roller journal bearing)

[0295] 62 Acquisition Department

[0296] 63 Presumption Department

[0297] 64 Forecasting Department

[0298] 65 Planning Department

[0299] 71 Measuring rod

[0300] 72 Gap Sensor

[0301] 80 Vibration Sensor (Detection Section)

[0302] 80a First Sensor

[0303] 80b Second Sensor

[0304] 80c Third Sensor

[0305] 81 Base

[0306] 91 Signal Amplifier

[0307] 92 Signal Processing Device

[0308] 93 Signal computing device

[0309] 94 Equipment control devices

[0310] 95 display devices

[0311] 96 Display devices

[0312] 100 Solid fuel pulverizing device

[0313] 101 Information Collection System

[0314] Server 102

[0315] 103 Planning System

[0316] 110 Primary air flow path (gas flow path for conveying)

[0317] 111 CPU

[0318] 120 Micro fuel supply path (micro fuel supply pipe)

[0319] 121 ROM

[0320] 130 RAM

[0321] 140 HDD

[0322] 150 Ministry of Communications

[0323] 180 bus

[0324] 200 boiler

[0325] 210 Furnace

[0326] 220 Burner (combustion device).

Claims

1. An anomaly detection system, wherein the anomaly detection system is an anomaly detection system for a roller journal bearing, the roller journal bearing supporting a rotatable crushing roller, the crushing roller being housed inside a housing constituting the outer shell of a solid fuel crushing device and crushing solid fuel between the crushing roller and the crushing table, The anomaly detection system has the following features: A detection unit, located on the outside of the housing, is provided on the support portion, which supports the crushing roller via the roller journal bearing and is mounted on the housing. The detection unit detects information generated on the support portion due to the rotation of the crushing roller; and The detection unit detects abnormalities in the roller journal bearing based on the information detected by the detection unit. The detection unit is disposed in the setting unit, which is located outside the housing of the eccentric shaft installed in the support unit of the housing. The eccentric shaft changes the distance of the crushing roller relative to the crushing table by rotating about the central axis.

2. The anomaly detection system according to claim 1, wherein, The detection unit detects information about the vibration of the support unit. The detection unit detects abnormalities in the roller journal bearing based on the vibration information detected by the detection unit.

3. The anomaly detection system according to claim 2, wherein, The detection unit detects information about vibrations in multiple directions.

4. The anomaly detection system according to claim 2, wherein, The detection unit performs the following processing: for the vibration information detected by the detection unit, it removes components having the frequency of vibration generated when the crushing roller crushes the solid fuel and / or components having the inherent vibration frequency of the transmission path from the roller journal bearing to the detection unit.

5. The anomaly detection system according to claim 2, wherein, The detection unit processes the vibration information detected by the detection unit to calculate the signal magnitude for each frequency.

6. The anomaly detection system according to claim 2, wherein, The detection unit detects the degree of abnormality in the roller journal bearing based on the vibration information detected by the detection unit.

7. The anomaly detection system according to claim 1, wherein, The detection unit is arranged in a manner that is not located on the central axis of the eccentric shaft.

8. A solid fuel pulverizing device, comprising: The shell, which constitutes the outer shell; A shredding table is housed inside the casing. A crushing roller, housed inside the housing, crushes solid fuel between the crushing roller and the crushing table; A support portion, installed on the housing, supports the crushing roller; A roller journal bearing supports the crushing roller in a manner that allows it to rotate freely relative to the support portion; and The anomaly detection system as described in claim 1.

9. The solid fuel pulverizing apparatus according to claim 8, wherein, The support portion is connected to the roller journal bearing in a manner that prevents relative movement. The support portion and the detection portion are joined in a manner that prevents them from moving relative to each other.

10. A solid fuel pulverizing device, comprising: The anomaly detection system according to any one of claims 1 to 7; and The remaining life estimation system estimates the remaining life of the roller journal bearing based on the operating information of the crushing roller. The solid fuel pulverizing device estimates the remaining life of the roller journal bearing based on information derived from the anomaly detection system and the remaining life estimation system.

11. An anomaly detection method, the anomaly detection method being a method for detecting anomalies in a roller journal bearing, the roller journal bearing supporting a rotatable crushing roller, the crushing roller being housed inside a housing constituting a shell and crushing solid fuel between the crushing roller and the crushing table, The anomaly detection method comprises the following steps: The detection process involves detecting information generated in the support section due to the rotation of the crushing roller by a detection unit. The detection unit is located in a section of the support section situated outside the housing. The support section supports the crushing roller via the roller journal bearing and is mounted on the housing. The inspection process detects abnormalities in the roller journal bearing based on the information detected by the detection unit. The detection unit is disposed in the setting unit, which is located outside the housing of the eccentric shaft installed in the support unit of the housing. The eccentric shaft changes the distance of the crushing roller relative to the crushing table by rotating about the central axis.

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