JP2021053589A - Solid fuel crushing device, boiler system, and abrasive quantity detecting method of crushing roller - Google Patents

Abstract

To simplify a structure.SOLUTION: A solid fuel crushing device includes a housing forming an outer shell, a rotary table on which a solid fuel supplied into the housing is placed, a roller portion 64 of a crushing roller 13 that presses and crushes the solid fuel placed on the rotary table, which can rotate about a center axis C2, a detecting portion 81 that is provided on the roller portion 64 and detects the abrasion quantity of the roller portion 64, a transmitting portion 82 that is fixed to the crushing roller 13 and transmits information detected by the detecting portion 81 by radio communication, and a receiving portion 90 that receives information transmitted from the transmitting portion 82.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a solid fuel crusher and a boiler system, and a method for detecting the amount of wear of a crushing roller.

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

As the crushing roller is used for a long time, the outer peripheral surface of the roller that comes into contact with the solid fuel wears. As the wear of the rollers progresses, the distance between the rotary table and the rollers becomes wider and the crushing performance deteriorates. Therefore, the worn rollers need to be repaired or replaced. As a method of detecting the progress of wear of the rollers, a method of manually measuring the amount of wear at the time of internal inspection of the mill, a method of providing a detection device for detecting wear on the rollers, and the like are known (for example, patent documents). 1).

Patent Document 1 discloses a mill in which an ultrasonic probe is provided in a hollow support shaft that supports a crushing roller. In the mill of Patent Document 1, the thickness of the roller is measured by transmitting an ultrasonic pulse from the ultrasonic probe and measuring the time for the echo from the bottom surface (the reflected signal from the surface of the crushing roller) to be returned. (Amount of wear) is being measured. Further, an output lead wire is connected to the ultrasonic probe.

Jikkai Sho 60-148307

However, in Patent Document 1, the amount of wear measured by the ultrasonic probe is transmitted by the output lead wire. In this way, when the detection unit that detects information about wear and the reception unit that receives the information detected by the detection unit are connected by a lead wire or the like (that is, when they are connected in a wired state), , It is necessary to route the lead wire in consideration of the rotation of the roller which is a rotating body. Further, it is necessary to provide a slip ring or the like on the lead wire or the like connecting the detection unit and the receiving unit. Due to these circumstances, the structure in which the detection unit and the reception unit are connected in a wired state may complicate the structure and complicate the installation work. Further, since the slip ring and the like are consumables whose connection portions are worn with use, they need to be replaced regularly. In addition, in order to ensure the reliability of signal transmission by vibration or slip ring in an atmosphere where solid fuel is crushed, the configuration may be complicated and the running cost may increase. It was.

The present disclosure has been made in view of such circumstances, and an object of the present invention is to provide a solid fuel crushing device and a boiler system capable of simplifying the structure, and a method for detecting the amount of wear of a crushing roller.
Another object of the present invention is to provide a solid fuel crushing device and a boiler system capable of reducing running costs, and a method for detecting the amount of wear of a crushing roller.

In order to solve the above problems, the following means are adopted in the solid fuel crushing apparatus and boiler system of the present disclosure and the wear amount detecting method of the crushing roller.
The solid fuel crusher according to one aspect of the present disclosure is rotatable about a housing forming an outer shell, a rotary table on which the solid fuel supplied in the housing is placed, and a central axis. A crushing roller that presses and crushes the solid fuel placed on the rotary table, a detection unit provided on the crushing roller to detect the amount of wear of the crushing roller, and fixed to the crushing roller. It includes a transmission unit that transmits information detected by the detection unit by wireless communication, and a reception unit that receives information transmitted from the transmission unit.

The method for detecting the amount of wear of a crushing roller according to one aspect of the present disclosure is pulverization in which a solid fuel placed on a rotary table is pulverized by being rotatably arranged around a central axis inside a housing forming an outer shell. A method for detecting the amount of wear of a roller, wherein the detection unit detects the amount of wear of the crushing roller by a detection unit provided on the crushing roller and a transmission unit fixed to the crushing roller. It includes a step of transmitting the collected information by wireless communication and a step of receiving the information transmitted from the transmitting unit by the receiving unit.

According to the present disclosure, the configuration can be simplified. Moreover, the running cost can be reduced.

It is a block diagram which shows the solid fuel crushing apparatus and the boiler which concerns on embodiment of this disclosure. It is a vertical sectional view of the solid fuel crushing apparatus of FIG. It is a side view of the roller provided in the solid fuel crushing apparatus of FIG. It is a schematic vertical sectional view of the roller of FIG. It is an enlarged cross-sectional view of the main part of the roller of FIG. 3, and is the figure which shows the detection part provided in the roller. It is sectional drawing which shows the modification of the detection part of FIG. It is sectional drawing which shows the modification of the detection part of FIG. It is sectional drawing which shows the modification of the detection part of FIG. It is sectional drawing which shows the modification of the detection part of FIG. It is sectional drawing which shows the modification of the detection part of FIG. It is a perspective view of the roller of FIG. It is sectional drawing of the roller of FIG. 11A. It is a perspective view which shows the modification of the roller of FIG. 11A. It is sectional drawing of the roller of FIG. 12A. It is an enlarged vertical sectional view of the main part of the solid fuel crushing apparatus of FIG. It is a vertical cross-sectional view which shows the modification of FIG. It is a vertical cross-sectional view which shows the modification of FIG. It is a functional block diagram which showed the function which the control part provided in the solid fuel crushing apparatus of FIG. 1 has. It is a graph which shows the relationship between the cumulative operation time and the wall thickness of a crushing roller. It is a graph which shows the relationship between the cumulative operation time and the wall thickness of a roller when the type of solid fuel to be crushed is changed. It is a figure which shows the system which concerns on the maintenance plan which concerns on embodiment of this disclosure.

[First Embodiment]
Hereinafter, the first embodiment of the present disclosure will be described with reference to the drawings.
As shown in FIG. 1, the power plant 1 according to the present embodiment includes a solid fuel crusher 100 and a boiler 200.

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

As shown in FIGS. 1 and 2, the solid fuel crusher 100 of the present embodiment includes a mill (crushing unit) 10, a coal feeder (fuel supply machine) 20, and a blower unit (transport gas supply unit) 30. A state detection unit 40 and a control unit (determination unit) 50 are provided.
In the present embodiment, "upper" means the direction of the vertically upper side, and "upper" such as the upper part and the upper surface means the part on the vertically upper side. Similarly, "bottom" indicates the part on the vertically lower side.

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

The mill 10 presses and crushes the housing (housing) 11 forming the outer shell, the rotary table 12 on which the solid fuel supplied in the housing is placed, and the solid fuel placed on the rotary table 12. A roller (crushing roller) 13 for rotating, a driving unit 14 for rotationally driving the rotary table 12, a rotary classifier 16, a fuel supply unit 17, and a motor 18 for rotationally driving the rotary classifier 16 are provided. There is.
The housing 11 is formed in a tubular shape extending in the vertical direction, and is a housing that houses a rotary table 12, a roller 13, a rotary classifier 16, and a fuel supply unit 17. The inner peripheral surface 11a of the housing 11 has a substantially cylindrical shape, and the central axis C1 (see FIG. 2) extending in the vertical direction of the housing 11 substantially coincides with the central axis of the rotary table 12 and the rotary classifier 16 described later. ing. Further, in the present embodiment, an accommodating portion 91 for accommodating the receiving unit 90, which will be described later, is formed on the upper portion of the housing 11.
A fuel supply unit 17 is attached to the central portion of the ceiling portion 42 of the housing 11. The fuel supply unit 17 supplies the solid fuel guided from the bunker 21 into the housing 11, is arranged along the vertical direction at the center position of the housing 11, and the lower end portion extends to the inside of the housing 11. ing.

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

Further, the rotary table 12 is provided with a table liner 12a. The table liner 12a is installed at a portion where the roller 13 is in contact with the upper surface of the rotary table 12 and is pressed, and protects the rotary table 12 from wear caused by crushing the solid fuel. The table liner 12a is fixed to the rotary table 12 by a key or the like, rotates together with the rotary table 12 by the driving force transmitted from the drive unit 14, and crushes the solid fuel in cooperation with the roller 13.

When the solid fuel is charged from the fuel supply unit 17 toward the center of the rotary table 12, the solid fuel is guided to the outer peripheral side of the rotary table 12 by the centrifugal force due to the rotation of the rotary table 12, and is between the solid fuel and the roller 13. It is sandwiched and crushed. The crushed solid fuel is blown upward by the transport gas (hereinafter referred to as primary air) guided from the transport gas flow path (hereinafter referred to as primary air flow path) 100a, and rotates. It is led to the formula classifier 16. The primary air flow path 100a supplies the primary air into the housing 11 below the rotary table 12 via a primary air duct (conveying gas supply unit) 27 (see FIG. 2) connected to the housing 11. .. An outlet 25 is provided on the outer periphery of the rotary table 12 to allow the primary air flowing in from the primary air flow path 100a to flow out to the space above the rotary table 12 in the housing 11. A vane 26 is installed at the air outlet 25 to give a turning force to the primary air blown out from the air outlet 25. The primary air to which the swirling force is applied by the vane 26 becomes an air flow having a swirling velocity component, and guides the solid fuel crushed on the rotary table 12 to the upper rotary classifier 16 in the housing 11. Further, the inner peripheral surface 11a of the housing 11 above the air outlet 25 is provided with a drift plate 15 protruding from the inner peripheral surface 11a of the housing 11 toward the center of the mill, and swivels upward from the air outlet 25. While bending the primary air blown out toward the inside of the mill, the primary air blown out from the outlet 25 prevents the crushed solid fuel from being blown to the rotary classifier 16 at the shortest distance. Since the surface of the drift plate 15 is exposed to primary air having a high flow velocity mixed with pulverized solid fuel and worn, a drift plate liner 15a having high wear resistance is provided. Of the crushed solid fuel mixed in the primary air, those larger than the predetermined particle size are classified by the rotary classifier 16 or fall without reaching the rotary classifier 16 and fall on the rotary table. It is returned to 12 and crushed again.

The roller 13 is a rotating body that crushes the solid fuel supplied from the fuel supply unit 17 to the rotary table 12. The roller 13 is pressed against the upper surface of the rotary table 12 and cooperates with the rotary table 12 to crush the solid fuel. Further, the roller 13 is provided with a wear sensor 80, which will be described later. The details of the roller 13 and the wear sensor 80 will be described later.
In FIG. 1, only one roller 13 is represented as a representative, but a plurality of rollers 13 are arranged to face each other at regular intervals in the circumferential direction so as to press the upper surface of the rotary table 12. To. For example, the three rollers 13 are arranged at equal intervals in the circumferential direction with an angular interval of 120 ° on the outer peripheral portion. In this case, the portion where the three rollers 13 are in contact with the upper surface of the rotary table 12 (the portion to be pressed) is equidistant from the rotation center axis of the rotary table 12.

The roller 13 can be swung up and down by the journal head 45, and is supported so as to be close to and separated from the upper surface of the rotary table 12. When the rotary table 12 rotates with the outer peripheral surface in contact with the upper surface of the rotary table 12, the roller 13 receives a rotational force from the rotary table 12 and rotates around the roller 13. When the solid fuel is supplied from the fuel supply unit 17, the solid fuel is pressed between the roller 13 and the rotary table 12 and crushed to become fine fuel.

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

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

The rotary classifier 16 is provided on the upper part of the housing 11 and has a hollow substantially inverted conical outer shape. The rotary classifier 16 includes a plurality of blades 16a extending in the vertical direction at its outer peripheral position. The blades 16a are provided at predetermined intervals (equal intervals) around the central axis of the rotary classifier 16. Further, the rotary classifier 16 uses a solid fuel crushed by the roller 13 having a size larger than a predetermined particle size (for example, 70 to 100 μm for coal) (hereinafter, crushed solid fuel exceeding a predetermined particle size as “coarse powder”. It is a device that classifies fuel into (referred to as "fuel") and fuel having a predetermined particle size or less (hereinafter, crushed solid fuel having a predetermined particle size or less is referred to as "fine powder fuel"). The rotary classifier 16 that classifies by rotation is also called a rotary separator, and is given a rotational driving force by a motor 18 controlled by a control unit 50, and substantially coincides with the central axis C1 extending in the vertical direction of the housing 11. It rotates around the fuel supply unit 17 around the central axis (not shown).

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

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

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

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

The blower unit 30 is a device that dries the solid fuel crushed by the rollers 13 and blows the primary air for supplying the rotary classifier 16 to the inside of the housing 11 through the primary air duct 27.
In this embodiment, the blower unit 30 cools the primary air fan (PAF: Primary Air Fan) 31, the hot gas flow path 30a, and the cold gas flow path 30a in order to adjust the primary air blown to the housing 11 to an appropriate temperature. It includes a gas flow path 30b, a hot gas damper 30c, and a cold gas damper 30d.

In the present embodiment, the heat gas flow path 30a heats a part of the air (outside air) sent from the primary air ventilator 31 through a heat exchanger (heater) 34 such as an air preheater. It is supplied as heat gas. A hot gas damper 30c (first blower portion) is provided on the downstream side of the hot gas flow path 30a. The opening degree of the heat gas damper 30c is controlled by the control unit 50. The flow rate of the hot gas supplied from the hot gas flow path 30a is determined by the opening degree of the hot gas damper 30c.

The cold gas flow path 30b supplies a part of the air sent out from the primary air ventilator 31 as cold gas at room temperature. A cold gas damper (second blower) 30d is provided on the downstream side of the cold gas flow path 30b. The opening degree of the cold gas damper 30d is controlled by the control unit 50. The flow rate of the cold gas supplied from the cold gas flow path 30b is determined by the opening degree of the cold gas damper 30d.

In the present embodiment, the flow rate of the primary air is the total flow rate of the hot gas supplied from the hot gas flow path 30a and the flow rate of the cold gas supplied from the cold gas flow path 30b, and the temperature of the primary air is the hot gas. It is determined by the temperature and mixing ratio of the hot gas supplied from the flow path 30a and the cold gas supplied from the cold gas flow path 30b, and is controlled by the control unit 50.
Further, a part of the combustion gas discharged from the boiler 200 is guided to the hot gas supplied from the hot gas flow path 30a via a gas recirculation ventilator (not shown) to form an air-fuel mixture, thereby forming the primary air flow path 100a. The oxygen concentration of the primary air flowing in from may be adjusted.

In the present embodiment, the state detection unit 40 of the housing 11 transmits the measured or detected data to the control unit 50. The state detection unit 40 of the present embodiment is, for example, a differential pressure measuring means, and is a portion where the primary air flows from the primary air flow path 100a into the mill 10 and the primary air and fine powder fuel from the inside of the mill 10 into the supply flow path 100b. The differential pressure with the outlet 19 discharged from the mill 10 is measured as the differential pressure in the mill 10. For example, depending on the classification performance of the rotary classifier 16, the increase / decrease in the circulation amount of the crushed solid fuel that circulates inside the mill 10 between the vicinity of the rotary classifier 16 and the vicinity of the rotary table 12 and the difference in the mill 10 with respect to this. The increase and decrease of pressure changes. That is, since the pulverized fuel discharged from the outlet 19 can be adjusted and managed with respect to the solid fuel supplied to the inside of the mill 10, the particle size of the pulverized fuel does not affect the combustibility of the burner portion 220. A large amount of pulverized fuel can be supplied to the burner portion 220 provided in the boiler 200.
Further, the state detection unit 40 of the present embodiment is, for example, a temperature measuring means, and is the temperature of the primary air supplied to the inside of the housing 11 for blowing the solid fuel crushed by the roller 13 to the rotary classifier 16. , The temperature of the primary air up to the outlet 19 is detected inside the housing 11, and the blower portion 30 is controlled so as not to exceed the upper limit temperature. Since the primary air is cooled by transporting the pulverized material while drying it in the housing 11, the temperature from the upper space of the housing 11 to the outlet 19 is, for example, about 60 to 80 degrees.

The control unit 50 is a device that controls each part of the solid fuel crushing device 100. The control unit 50 may control the rotation speed of the rotary table 12 with respect to the operation of the mill 10 by transmitting a drive instruction to the drive unit 14, for example. The control unit 50 optimizes the differential pressure in the mill 10 within a predetermined range by adjusting the classification performance by, for example, transmitting a drive instruction to the motor 18 of the rotary classifier 16 to control the rotation speed. It is possible to stabilize the supply of pulverized fuel. Further, the control unit 50 adjusts the supply amount of the solid fuel that the transport unit 22 conveys the solid fuel and supplies it to the fuel supply unit 17 by transmitting a drive instruction to the motor 23 of the coal feeder 20, for example. Can be done. Further, the control unit 50 can control the opening degree of the hot gas damper 30c and the cold gas damper 30d to control the flow rate and temperature of the primary air by transmitting the opening degree instruction to the blower unit 30. Further, the control unit 50 controls the hydraulic pressure applied to the pressing device 49 according to, for example, the supply amount of solid fuel and the rotation speed of the rotary classifier 16, so that the roller 13 is pressed against the rotary table 12. It optimizes the force and enables stable solid fuel crushing.

The control unit 50 is composed of, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a computer-readable storage medium, and the like. Then, as an example, a series of processes for realizing various functions are stored in a storage medium or the like in the form of a program, and the CPU reads this program into a RAM or the like to execute information processing / arithmetic processing. As a result, various functions are realized. The program is installed in a ROM or other storage medium in advance, is provided in a state of being stored in a computer-readable storage medium, or is distributed via a wired or wireless communication means. Etc. may be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like.

Next, the boiler 200 that burns using the fine fuel supplied from the solid fuel crusher 100 to generate steam will be described.
The boiler 200 includes a fireplace 210 and a burner section 220.

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

The combustion gas discharged from the boiler 200 is subjected to a predetermined treatment by an environmental device (not shown by a denitration device, an electrostatic precipitator, etc.), and is sent from the primary air ventilator 31 by a heat exchanger 34 such as an air preheater, for example. The heat is exchanged between the air and the air sent from the indented air blower 32, and the air is guided to the chimney (not shown) via the induced Draft Fan (IDF) 33 and released to the outside air. To. The air sent from the primary air ventilator 31 heated by the combustion gas in the heat exchanger 34 is supplied to the hot gas flow path 30a described above.
The water supply to each heat exchanger of the boiler 200 is heated by an economizer (not shown) and then further heated by an evaporator (not shown) and a superheater (not shown) to generate high-temperature and high-pressure steam to generate electricity. It is sent to a steam turbine (not shown), which is a unit, to rotate drive the steam turbine, and a generator connected to the steam turbine (not shown) is driven to rotate to generate electricity, thereby forming a power plant 1.

Next, the rollers 13 and the like will be described in detail with reference to FIGS. 3 to 12.
The roller 13 is rotatably supported by the housing 11 about the central axis C2 via the journal shaft 46, the journal head 45, and the support shaft 48 (see also FIGS. 1 and 2).
As shown in FIGS. 3 and 4, the roller 13 includes a journal housing 63 that is rotatably supported by the tip of the journal shaft 46, a substantially annular roller portion 64 that is fitted onto the journal housing 63, and a substantially annular roller portion 64. It has. The journal housing 63 is provided so as to cover the tip of the journal shaft 46, and its outer peripheral surface is formed in a cylindrical shape.

The roller portion 64 is formed in a substantially annular shape. Further, the roller portion 64 is fitted with the journal housing 63 so that the inner peripheral surface is in contact with the outer peripheral surface of the journal housing 63. When the rotary table 12 rotates in a state where the outer peripheral surface of the roller portion 64 is in contact with the upper surface of the rotary table 12, the roller 13 can rotate by receiving a rotational force from the rotary table 12. Further, when the solid fuel is placed on the upper surface of the rotary table 12, the solid fuel is crushed by being sandwiched between the upper surface of the rotary table 12 and the outer peripheral surface of the roller portion 64. .. The roller portion 64 is pressed against the rotary table 12 by the pressing device 49, and by adjusting the pressing force (for example, a hydraulic load), stable solid fuel pulverization becomes possible.
The broken line L1 in FIG. 3 shows the progress of wear of the roller portion 64 in the initial stage of wear (the initial stage or the like means the initial stage in the period of use). That is, in the example of the present embodiment, in the initial stage, the roller portion 64 is in a situation where a part P1 on the base end side (that is, the side opposite to the tip end side) of the roller portion 64 is worn more than the other parts. It is in. Here, the base end side indicates the outer peripheral side in the radial direction of the rotary table 12, and the distal end side indicates the rotation center axis C1 side of the rotary table 12. Further, the alternate long and short dash line L2 in FIG. 3 shows the progress mode of wear of the roller portion 64 in the final stage of wear (the final stage or the like means the final stage in the use period). At the final stage, the roller portion 64 wears around P1 and the region facing the rotary table 12 wears substantially uniformly as a whole. Similarly, the broken line L3 in FIG. 3 shows the progress mode of wear of the rotary table 12 in the initial stage of wear, and the alternate long and short dash line L4 shows the progress mode of wear of the rotary table 12 in the final stage of wear. There is. Although the case where P1 is located on the proximal end side of the roller portion 64 as an example is described, the P1 is not limited to the proximal end side of the roller portion 64. P1 changes on the outer peripheral surface of the roller portion 64 in the central axis C2 direction depending on the specifications of the mill 10 and the operating conditions.

The wear sensor 80 includes a detection unit (first detection unit) 81 that detects wear of the roller unit 64 and a transmission unit (first transmission unit) 82 that transmits information detected by the detection unit 81 to the reception unit 90 by wireless communication. And a power supply device (not shown) that supplies electric power to the detection unit 81 and the transmission unit 82. The wear sensor 80 applied to the solid fuel crusher 100 according to the present embodiment may be any known sensor as long as it can detect information on the progress of wear. For example, the wear sensor 80 may be a wear sensor that utilizes a disconnection of a lead wire, which will be described later, or an optical fiber type wear sensor that detects the amount of wear using an optical fiber, or is based on a change in electrical resistance value. It may be a resistance type wear sensor that detects the amount of wear. Further, it may be an ultrasonic type wear sensor that detects the amount of wear by using ultrasonic waves such as an ultrasonic probe. Further, it may be a magnetic wear sensor or a capacitance type wear sensor. In the following description, as an example, an example in which the wear sensor 80 using the disconnection of the lead wire is applied to the solid fuel crusher 100 will be described.

The power supply device (not shown) is provided not in the roller 13 but in a non-rotating body such as a support arm 47 or a housing 11. The power supply device is a device by a wireless power supply means that supplies power to the detection unit 81 and the transmission unit 82 by a wireless power supply means such as a magnetic field resonance method or an electromagnetic induction method. In this way, by adopting the configuration in which the power is supplied by the wireless power feeding means, it is not necessary to provide the power supply in the roller 13 which is a rotating body, so that it is not necessary to consider the arrangement of the power cable. Therefore, the structure can be simplified.
The power supply device may be arranged outside the mill 10 as long as it can wirelessly supply power to the detection unit 81 and the transmission unit 82. Further, it may be provided in the wear sensor 80.

The power supply device of the present disclosure is not limited to the structure to which the above-mentioned wireless power feeding means is applied, and may have other structures. For example, the power source may be a wired power supply device that supplies electric power from a battery or the like provided in the wear sensor 80 to the detection unit 81 and the transmission unit 82. In this configuration, the wired power supply device, the detection unit 81, and the transmission unit 82 are connected by a power cable. Further, the power source may be a gravity type power generation device that generates power by using the rotation of the roller 13, or a piezoelectric type power generation device that generates power by using the pressing force of the roller 13 against the rotary table 12. You may.

The transmission unit 82 transmits the wear information received from the detection unit 81 to the reception unit 90 through an antenna (not shown) by wireless communication such as electromagnetic waves. The transmission unit 82 is arranged in the storage unit 83 as shown in FIG.

The storage portion 83 is a concave space formed so as to be recessed from the inner peripheral surface of the roller portion 64. The storage portion 83 is a closed space when the roller portion 64 and the journal housing 63 are fitted to each other. The storage portion 83 may be formed anywhere in the same rotating body as long as there is no risk of damage to the wear sensor 80 due to progress of wear. For example, the storage portion 83 may be formed in the journal housing 63. Specifically, for example, the storage unit 83 may form a concave space recessed from the outer peripheral surface of the journal housing 63, and the transmission unit 82 may be arranged in the storage unit 83. It is preferable that the storage unit 83 is formed at a position where the transmission unit 82 can be easily removed and re-installed during maintenance of the transmission unit 82. Further, the accommodating portion 83 may be formed by casting, or may be formed by machining or another processing method. Further, the size may be in consideration of the dimensions of the stored wear sensor 80 and the like, and the dimensions may be inspected with a gauge or the like at the time of manufacturing.

As described above, the transmission unit 82 is a wireless power supply type transmitter to which power is supplied from the power supply means by the wireless power supply means. Further, since the roller 13 operates at a high temperature (for example, about 80 ° C.), violently vibrates, and in an environment where crushed solid fuel dust flies, the roller 13 operates every few years. Is used, which has excellent heat resistance, vibration resistance, and abrasion resistance.

Specifically, the transmission unit 82 may be, for example, an RFID (Radio Frequency Identification). RFID can transmit information wirelessly using an antenna and can also receive electric power wirelessly. Further, the transmission unit 82 may use the metal journal housing 63 as an antenna. Specifically, by electrically adhering the antenna to a metal member such as the roller portion 64 or the journal housing 63 so as to be electrically conductive, the roller portion 64 or the journal housing is shown by the broken line arrow A1 in FIG. Information may be transmitted wirelessly via 63. With this configuration, the distance between the antenna and the receiving unit 90 is shortened, so that information can be transmitted to the receiving unit 90 more reliably.
The transmitter 82 is not limited to RFID. For example, an IC tag, a telemeter, a remote communication device such as a transponder, or the like can be used.

As shown in FIG. 4, the detection unit 81 has a plurality of lead wires 85. Each lead wire 85 is arranged in a plurality of hole portions 84 formed in the roller portion 64. The hole 84 may be formed by casting, or may be formed by machining or other processing methods. Further, the size and arrangement may be inspected with a gauge or the like. In one hole portion 84, only one set of lead wires 85 (one lead wire makes a U-turn at the innermost bottom surface portion of the hole portion 84 as described later) is provided. In FIG. 4, for the sake of illustration, the lead wire 85 is omitted, and only the position of the tip end portion on the innermost bottom surface portion of the hole portion 84 of the lead wire 85 is indicated by a black circle.

The plurality of hole portions 84 are formed at predetermined intervals along the central axis C2 direction of the roller portion 64. Each hole portion 84 extends in the radial direction from the central axis C2 side (inner peripheral surface side) of the roller portion 64. The end of each hole 84 on the central axis C2 side is connected to the storage portion 83. The plurality of hole portions 84 are formed so as to have different lengths in the radial direction from the end portion on the central axis C2 side. That is, the distances from the end portion of the roller portion 64 on the outer peripheral surface side (that is, the bottom surface portion of the hole portion 84) to the outer peripheral surface of the roller portion 64 are different for each of the plurality of hole portions 84. In the example of FIG. 4, the length of the hole portion 84 provided on the base end side of the roller portion 64 is the longest, and the length of the hole portion 84 arranged on the tip end side of the roller portion 64 is shorter. ing. Further, for example, the longest hole portion 84 is arranged closest to the position P1 where wear is most likely to proceed. The broken lines L5, L6, and L7 in FIG. 4 schematically indicate the direction of wear progress. That is, the wear of the roller portion 64 proceeds from L5 to L7 with P1 as the center.

Each lead wire 85 is connected to the transmission unit 82 as shown in FIG. The lead wire 85 extends from the transmitting portion 82 toward the bottom surface portion of the hole portion 84, and makes a U-turn in the vicinity of the bottom surface portion and is folded back. This folded portion is the tip of the lead wire 85. That is, each of the plurality of conducting wires 85 has a different distance from the end portion (tip portion) on the outer peripheral surface side to the outer peripheral surface of the roller portion 64. A current is flowing through each lead wire 85. When the roller portion 64 is worn and the wire 85 is broken near the tip of the wire 85 near the bottom surface, the roller portion 64 is detected to the position of the tip of the broken wire 85 by detecting the break of the wire 85. It is possible to grasp that the wear of the wire is progressing.
Specifically, in the example of FIG. 4, when the wear progresses to the broken line L5, the lead wire 85 arranged in the longest hole 84 is broken, so that the lead wire arranged in the longest hole 84 is broken. It can be detected that wear has progressed to the position of the tip of 85.

The detection unit 81 is not limited to the configuration described above. For example, as shown in FIG. 6, a plurality of lead wires 85 may be arranged in one hole portion 84. In this configuration, the plurality of lead wires 85 have different distances from the end portion (tip portion) on the outer peripheral surface side to the outer peripheral surface of the roller portion 64. Therefore, as in the example shown in FIG. 4, the degree of progress of wear can be detected by determining which lead wire 85 is broken.

Further, as shown in FIG. 7, the detection unit 81 may provide a resistor 87 at the tip of the lead wire 85. In this configuration, the conductive cross-sectional area of the resistor 87 decreases as the roller portion 64 wears and the resistor 87 is scraped. As the conductive cross-sectional area of the resistor 87 decreases, the resistance value of the resistor 87 increases accordingly. By increasing the resistance value, the degree of progress of wear can be detected. With this configuration, the degree of wear progress can be continuously detected. As a result, the state of the progress rate of wear can be continuously grasped, so that the detection of wear proceeds discontinuously (for example, when there is an abnormal situation in which wear progresses rapidly). Compared with the configurations shown in FIGS. 4 and 6), it is possible to grasp an abnormal wear state, particularly a state of progress of wear, at an early stage. However, in the case of a configuration in which wear is continuously detected, if the wear resistance of the detection unit 81 is low with respect to the material of the roller unit 64, only the detection unit 81 is selectively worn, and the correct wear of the roller unit 64 is achieved. Since the degree of progress cannot be detected, it is desirable that the detection unit 81 has wear resistance equivalent to that of the roller unit 64.

The solid fuel crusher 100 of the present embodiment is a discontinuous detection unit (detection unit that detects the progress of wear due to disconnection of the lead wire 85 shown in FIGS. 4 and 6) or a continuous detection unit (a continuous type detection unit) described above. Only one type of detection unit (detection unit) that detects the progress of wear by changing the resistance value of the resistor 87 shown in FIG. 7 may be provided, or both types of detection units may be provided. It is preferable to provide a plurality of detection units in the circumferential direction of the roller unit 64, and to use the continuous type detection unit and the discontinuous type detection unit together. In such a configuration, the state of the wear progress rate can be grasped by the continuous method, and the individual highly accurate wear amount can be grasped by the discontinuous method. By using the continuous type and non-continuous type detection units together, the reliability of the detected wear amount information is improved. Further, since redundancy can be obtained by using a plurality of detection units at the same time, even if one of the detection units is damaged, the progress of wear can be detected by the remaining detection units. ..

Further, as shown in FIG. 8, a plurality of partition walls 86 may be provided in the hole portion 84. Each partition wall 86 separates the space on the outer peripheral surface side of the roller portion 64 and the space on the central axis C2 side in the space partitioned by the hole portion 84. In this embodiment, as an example, three partition walls 86 are provided. The three partition walls 86 are arranged side by side at predetermined intervals in the radial direction of the roller portion 64. Hereinafter, the first partition wall 86a, the second partition wall 86b, and the third partition wall 86c will be referred to in order from the partition wall 86 arranged on the outer peripheral surface side. The first partition wall 86a is arranged so that the tip end portion of the lead wire 85 arranged on the outermost peripheral surface side is located between the bottom surface portion of the hole portion 84 and the first partition wall 86a. Further, the second partition wall 86b is arranged so that the tip end portion of the lead wire 85 secondly arranged on the outer peripheral side is located between the first partition wall 86a and the second partition wall 86b. The third partition wall 86c is arranged so that the tip end portion of the lead wire 85 arranged on the outer peripheral side is located between the second partition wall 86b and the third partition wall 86c. It is more preferable that each partition wall 86 is made of a raw material having wear resistance equal to or higher than that of the roller portion 64.

Further, as shown in FIG. 9, the hole portion 84 may be filled with the sealing material 88, and the lead wire 85 may be sealed in the hole portion 84. As the encapsulant 88, for example, resin, metal, ceramic, or the like may be used. With such a configuration, it is possible to suppress the vibration of the lead wire 85 and prevent an unintended disconnection. As shown in FIG. 10, the transmission unit 82, the lead wire 85, and the partition wall 86 may be sealed with the sealing material 88. With this configuration, it is possible to suppress vibrations of not only the lead wire 85 but also the partition wall 86 and the lead wire 85 to prevent unintended disconnection. Further, as shown in FIG. 10, the lead wire 85 or the like may be packaged in a state of being sealed with the sealing material 88 in advance and inserted into the hole portion 84 as a cartridge.

Next, the position where the detection unit 81 is provided will be described with reference to FIGS. 11A to 12B.
As shown in FIG. 11B, the roller portion 64 is provided at two locations, an intermediate position P2 of the width of the roller portion 64 in the direction along the central axis C2 and a position P1 that is most easily worn in the direction along the central axis C2. May be good. In this case, as shown in FIG. 11A, the two detection units 81 are arranged side by side in the direction along the central axis C2. Further, a set of two detection units 81 may be provided at predetermined intervals in the circumferential direction.
Further, as shown in FIG. 12A, a plurality of detection units 81 may be arranged so as to be separated in the direction along the central axis C2 and also in the circumferential direction. As a result, the plurality of detection units 81 can be appropriately provided without interfering with each other. Also in this case, as shown in FIG. 12B, there are two positions, the intermediate position P2 of the roller portion 64 in the direction along the central axis C2 of the roller portion 64 and the most easily worn position P1 in the direction along the central axis C2. Is preferably provided with a detection unit 81.
In FIGS. 11B and 12B, the lead wire 85 located on the outermost peripheral surface side is arranged at the intermediate position P2 of the roller portion 64 width in the direction along the central axis C2, but the lead wire 85 located on the outermost peripheral surface side. Is more preferably provided at the position P1 where is most likely to be worn. By arranging in this way, the wear of the roller portion 64 can be accurately grasped at an early stage when the wear occurs.

The position P1 at which wear is most likely to occur may differ due to structural differences such as the positional relationship between the roller portion 64 and the rotary table 12 and the surface shape of the roller portion 64. For this reason, it is preferable to appropriately set the positions that are most likely to be worn by each solid fuel crusher based on the results of simulations performed in advance and the results of past actual operations. If the position P1 at which wear is most likely to occur is unknown, the guide wire 85 located on the outermost peripheral surface side is the intermediate position P2 of the roller portion 64 in the direction along the central axis C2, and the rotary table 12 from the intermediate position P2. It is preferable that the detection portions 81 are provided at the same distance from the outer peripheral surface of the roller portion 64 at two positions shifted by a predetermined dimension on the outer peripheral side of the roller portion 64.

Next, the receiving unit 90 will be described with reference to FIGS. 13 to 15.
The receiving unit 90 receives the information transmitted wirelessly from the transmitting unit 82 (that is, receives the wireless communication), and at the same time, transmits the received information to the control unit 50. As shown in FIG. 13, the receiving unit 90 is provided in the accommodating unit 91 formed in the housing 11 (see also FIG. 2). In the present embodiment, in detail, for example, the accommodating portion 91 is provided so as to project from the side surface of the upper portion of the housing 11 toward the outer peripheral side. The accommodating unit 91 forms an accommodating space for accommodating the receiving unit 90 inside. The receiving unit 90 is arranged in the accommodation space. The accommodating space communicates with the internal space formed inside the housing 11, but the atmospheric gas in which the crushed solid fuel powder exists in the internal space inside the housing 11 does not directly enter the accommodating portion 91. I have to. That is, the receiving unit 90 is arranged so as to be isolated from the transmitting unit 82.

Specifically, a seal gas supply pipe (seal gas supply unit) 92 communicates with the accommodating unit 91. The seal gas supply pipe 92 supplies the seal gas supplied from the seal gas supply device (not shown) to the accommodation space. Since the accommodation space is filled with the seal gas supplied from the seal gas supply pipe 92, the atmospheric gas in the internal space inside the housing 11 is prevented from directly entering the accommodation portion 91.

Instead of the seal gas supply pipe 92, as shown in FIG. 14, a partition window 93 that separates the accommodation space from the internal space of the housing 11 may be provided. The partition window 93 is a plate-shaped member made of a material that transmits electromagnetic waves (wireless communication), such as glass or ceramics.

Further, as shown in FIG. 15, the receiving unit 90 may be divided into a receiving antenna unit 94 and an information transmitting / receiving unit 95. In this case, the information transmission / reception unit 95 is installed outside the housing 11. Further, the receiving antenna unit 94 is arranged in the accommodating unit 91 in the same manner as the receiving unit 90 described above. With this configuration, the information transmission / reception unit 95 is not directly affected by the atmospheric gas in which the crushed solid fuel powder is present in the internal space inside the housing 11, so that the reliability can be improved. Further, the housing 11 itself, which is a metal member, may be used as a receiving antenna portion.

The control unit 50 estimates the remaining life of the roller unit 64. That is, the control unit 50 has a function as a remaining life estimation system of the roller unit 64 that crushes the solid fuel with the rotary table 12. The function as the remaining life estimation system may be provided in a control device different from the control unit 50.

FIG. 16 is a functional block diagram showing a function related to estimating the remaining life of the control unit 50. As shown in FIG. 16, the control unit 50 includes an acquisition unit 52, an estimation unit 53, a prediction unit 54, and a planning unit 55.

The acquisition unit 52 acquires the information transmitted from the reception unit 90. Specifically, the detection unit 81 detects and acquires wear information (wear amount for each measurement position, etc.) of the roller unit 64 transmitted from the transmission unit 82. As a result, the control unit 50 can monitor the wear status of the roller unit 64.

The estimation unit 53 estimates the remaining life of the roller unit 64 based on the wear information acquired by the acquisition unit 52. The remaining life may be estimated by the control unit 50, or the operator or the observer may separately create a graph or the like of the wear progress status to estimate the time until the life. Further, the control unit 50 may display the estimated remaining life on a display unit such as a display.

The prediction unit 54 estimates in the estimation unit 53 based on a database in which the operating state of the solid fuel crusher 100 and the remaining life transition characteristics corresponding to the operating state are accumulated in advance and a database accumulated in the current operation. The future transition of the remaining life is predicted from the transition of the remaining life. The remaining life estimation characteristic is information indicating the characteristic of the remaining life that changes depending on the operating state, and specifically, it is a curve characteristic (may be a straight line) as shown in A, B, and C of FIG. That is, the database stores the past and present operation information of the solid fuel crusher 100. The database may store the past operation data of the solid fuel crushing device 100 whose life is to be estimated, or may store the past operation data of another solid fuel crushing device 100 having a similar configuration. Further, not only the actual operation data but also the virtually simulated data may be stored in the database. The database may be provided in the control unit 50 (storage unit) or may be provided in another device. The operating state includes the type of solid fuel (coal type information, fuel type information, etc.), the amount of solid fuel supplied (coal supply amount), the hydraulic load on the roller 13 (pressing pressure on the rotary table 12 of the roller unit 64), and the solid. It includes at least one of the cumulative operating time of the fuel crushing device 100 and the operating load of the solid fuel crushing device 100. The operating state is not limited to the above and can be included as long as it is a parameter that affects the life of the roller portion 64.

Specifically, the prediction unit 54 refers to the database and selects data on the operating state similar to the operating state of the solid fuel crushing device 100, which is the target for estimating the remaining life, and converts the data into the data on the similar operating state. Select and acquire the corresponding remaining life transition characteristics. The data of the similar operating state is the data of the operating state in which the degree of influence of the remaining life is estimated to be similar to the operating state of the solid fuel crusher 100 for which the remaining life is estimated. For example, when selecting the operating state using the type of solid fuel, wear information on the operating time for the solid fuel of the solid fuel crusher 100, which is the target for estimating the remaining life, from the viewpoint of the degree of influence on the remaining life. An operating state containing solid fuel, which is assumed to have a similar effect on changes in (wear amount for each measurement position, etc.), becomes a similar operating state. It should be noted that the priority of the similarity judgment may be set for each parameter of the operating state, and the similarity judgment may be performed for the parameter having a high priority (for example, the type of solid fuel).

FIG. 17 shows an example in which the remaining life transition characteristics in a similar operating state are selected for the roller portion 64 of the solid fuel crusher 100, which is the target for estimating the remaining life. FIG. 17 shows an example in which characteristic A, characteristic B, and characteristic C are selected as the remaining life transition characteristics. Then, in FIG. 17, the estimation results of the remaining life from the measurement information of the roller wall thickness performed on the solid fuel crusher 100 which is the target of estimating the remaining life are E1 (first estimation result) and E2 (2). The estimation result of the first time) and En (the estimation result of the nth time) are shown.

The prediction unit 54 is the result of estimating the remaining life of the roller unit 64 of the solid fuel crusher 100, which is the target of estimating the remaining life, from the selected remaining life transition characteristics (A, B, C). The remaining life transition characteristics (A, B, C) having the transition characteristics of the roller wall thickness similar to the transition characteristics E are specified. In the example of FIG. 17, since the transition characteristic from E1 to En from the measurement information of the roller wall thickness is similar to the characteristic C, the characteristic C is specified. For example, the determination of similarity may be made based on whether or not the transition characteristics of the roller wall thickness (or the amount of wear) with respect to the cumulative time match within a predetermined range. Whether or not they match within a predetermined range may be matched within ± 10%, excluding measurement information (roller wall thickness or wear amount) that is clearly judged to be out of order, and more preferably. The match may be within ± 5%.
When the characteristic C is specified, it is estimated that the solid fuel crusher 100, which is the target of estimating the remaining life, will change the remaining life characteristic like the characteristic C in the future and reach the life reaching time Tb. In this way, based on the past database excluding the data currently being measured, the future remaining life transition can be predicted in consideration of the operating state of the solid fuel crusher 100, so that the remaining life can be more accurately predicted. It becomes possible to estimate. The transition characteristic E of the estimation result of the remaining life performed on the roller portion 64 of the solid fuel crusher 100, which is the target of the estimation of the remaining life, may be the transition characteristic from the time of completion to the present, or from the present to the past. It may be a transition characteristic in a predetermined period, or it may be a transition characteristic from the time when the operating state changes significantly (for example, the type of solid fuel changes) to the present.

As shown in the example of FIG. 17, the transition characteristics of the estimation result of the remaining life of the roller unit 64 carried out for the solid fuel crushing apparatus 100 to be estimated for the remaining life and the selected remaining life transition characteristics are used. Even if it does not correspond completely, a similar transition characteristic may be selected from the selected remaining life transition characteristics. In addition, among the selected remaining life transition characteristics, a transition characteristic similar to the transition characteristic of the estimation result of the remaining life performed on the roller portion 64 of the solid fuel crusher 100, which is the target of the remaining life estimation, is a past database. If not, the prediction may be made based on the selected remaining life transition characteristic. For example, in FIG. 17, the transition characteristic of the estimation result of the remaining life with respect to the roller portion 64 of the solid fuel crusher 100 for which the remaining life is estimated is the difference between the characteristic A and the characteristic B on the characteristic A side. When it is located by the ratio of the difference between the characteristic A and the characteristic B side, the future residual life of the roller portion 64 of the solid fuel crusher 100, which is the target for estimating the remaining life, is based on the characteristic A and the characteristic B. It may be used to predict the transition. In this case, for example, an intermediate line between the characteristic A and the characteristic B is generated by a proportional ratio of the difference between the characteristic A side and the characteristic B side, and the remaining life transition is predicted.

It should be noted that the processing performed by the prediction unit 54 (selection of similar operating conditions in the database and the remaining life performed on the roller unit 64 of the solid fuel crusher 100, which is the target for estimating the remaining life in the selected remaining life transition characteristics). The selection of the remaining life transition characteristic having the transition characteristic similar to the transition characteristic of the estimation result and the prediction of the future remaining life transition based on the selected remaining life transition characteristic) may be processed by a preset algorithm. , AI may be used for appropriate processing.

Further, as shown in FIG. 18, for example, when the solid fuels A, B, and C, which are the types of solid fuels (coal types) having different degrees of influence on the wear of the roller portion 64, are switched for operation, respectively. The amount of wear can be estimated from the measurement information of the roller wall thickness for each change of coal type, and the remaining life with respect to the cumulative operating time can be evaluated. Therefore, the replacement cycle of the roller portion 64 can be extended from the remaining life estimated from the measurement result at the time of the conventional internal inspection.
That is, conventionally, based on the wear measurement result (wear amount) at the time of internal inspection, the remaining life (wear limit) was predicted when the wear progressed to about the same level as before (see the broken line in the graph). On the other hand, in the present embodiment, the wear amount of the roller wall thickness can be sequentially measured by the cumulative operation time and the wear amount can be estimated for each switching of each coal type, so that the remaining life can be accurately predicted. (See the alternate long and short dash line in the graph in FIG. 18). Therefore, as shown in FIG. 18, the wall thickness of the roller portion 64 can be used up by X on the vertical axis of the graph as compared with the conventional case. Further, the operation time until the replacement cycle of the roller portion 64 can be extended by Y on the horizontal axis of the graph.

The planning unit 55 creates a maintenance plan based on the estimated remaining life transition characteristics. Specifically, since it is possible to know at what point in the future the remaining life estimated by the estimation unit 53 and the remaining life estimated by the prediction unit 54 will be reached, the planning unit 55 creates a maintenance plan. Since the remaining life transition characteristic can be estimated more accurately as described above, it is possible to make a plan with a margin for the life.

The planning unit 55 creates, for example, a maintenance plan before a predetermined period with respect to the estimated life arrival time. The predetermined period is set based on a period necessary for performing maintenance safely and stably, for example, setting the period from the arrangement of the roller unit 64 for maintenance to the time required for replacement as the predetermined period. The maintenance plan includes, for example, maintenance time, an operation plan for adjusting the maintenance time, and at least one of load sharing adjustments in a plurality of solid fuel crushing devices 100.

The maintenance time is a time (recommended time) for replacing the roller portion 64, which is set based on the estimated remaining life transition characteristic. The maintenance time is set, for example, by adding a predetermined margin to the estimated life arrival time.

The operation plan for adjusting the maintenance time is an operation plan for the solid fuel crushing apparatus 100, and is for adjusting the time until the maintenance time. For example, if the maintenance period has already been set and is later than the estimated lifespan, an operating plan is planned to extend the lifespan. Specifically, the type of solid fuel is changed and the degree of fineness is alleviated. By making the operating condition appropriate, it is possible to extend the life more safely and perform maintenance at an appropriate time. If the preset maintenance time is earlier than the estimated life end time, an operation plan for increasing the load of the solid fuel crushing device 100 (the amount of solid fuel to be crushed) may be planned. Good.

The load sharing adjustment in the plurality of solid fuel crushing devices 100 is to appropriately adjust the load sharing among the plurality of solid fuel crushing devices 100 provided in the power plant 1. For example, each solid fuel crushing device is used to match the maintenance time of the solid fuel crushing devices 100 in a plurality of units, or to set the time stepwise (the maintenance interval is set to be equal in the plurality of solid fuel crushing devices 100). Plan to adjust the load sharing of 100. For example, when the expected life arrival time for one of the plurality of solid fuel crushing devices 100 is earlier than that of the other solid fuel crushing device 100, the solid fuel crushing device is used. By relaxing the load of 100 and causing another solid fuel crushing device 100 to bear the load, it is possible to adjust the time to reach the end of the life of the plurality of solid fuel crushing devices 100.

FIG. 19 is an example of a system related to a maintenance plan. As shown in FIG. 19, on the user side, the remaining life estimation information of the solid fuel crushing apparatus 100 is aggregated in the information aggregation system 101, and the server 102 on the apparatus manufacturer side acquires the information aggregated in the aggregation system. The planning system 103 makes a plan and makes a proposal to the user. Although FIG. 19 illustrates a case where the planning unit 55 is provided as the planning system 103 on the device manufacturer side, it may be provided on the solid fuel crushing device side of the user.

According to this embodiment, the following effects are exhibited.
In the present embodiment, the transmitting unit 82 transmits the amount of wear of the crushing roller detected by the detecting unit 81 to the receiving unit 90. As a result, the amount of wear of the roller portion 64 can be detected and monitored without stopping the solid fuel crushing device 100.
Further, the transmission unit 82 transmits the amount of wear to the reception unit 90 by wireless communication. That is, the transmitting unit 82 and the receiving unit 90 are not connected by a lead wire or the like. Therefore, the structure can be simplified. Further, since it is not necessary to consider the routing of the lead wire 85 and the like, the installation work can be simplified.
Further, since no consumables are provided, the running cost can be reduced as compared with a configuration in which consumables such as a slip ring used when the transmitting unit 82 and the receiving unit 90 are connected by a lead wire or the like are provided. it can.

Further, in the present embodiment, the plurality of detection units 81 are arranged apart from each other in the direction along the rotation center axis C2 of the roller portion 64, and are arranged apart from each other in the circumferential direction of the roller portion 64. As a result, the amount of wear of the roller portion 64 can be detected in a wide range in the direction along the central axis C2. Further, the amount of wear of the roller portion 64 can be detected in a wide range in the circumferential direction.
Further, when a plurality of hole portions 84 are formed in order to provide the plurality of detection portions 81 in the roller portion 64 as in the present embodiment, the strength of the portion in which the plurality of detection portions 81 are centrally provided is reduced. However, in the present embodiment, the decrease in strength can be suppressed by dispersing the portions where the strength may decrease in the direction along the central axis C2 of the roller portion 64 and in the circumferential direction. For example, when the detection units 81 (the portions where the strength decreases) are lined up in the central axis C2 direction, the roller portion 64 may be damaged or the like with the portion as the base point. In the present embodiment, since the detection unit 81 is dispersed, it is possible to suppress a decrease in the strength of the roller unit 64.

Further, in the present embodiment, at least one of the plurality of detection units 81 is provided at a position that is most likely to be worn or a position that is expected to be most worn in the direction along the central axis C2. As a result, the degree of progress of wear of the roller portion 64 at the initial stage of wear of the roller portion 64 can be accurately grasped.

Further, in the present embodiment, the detection unit 81 has a plurality of lead wires 85 having different distances from the tip portion to the outer peripheral surface of the roller portion 64. As the wear of the outer peripheral surface of the roller portion 64 progresses, first, among the plurality of lead wires 85, the lead wire 85 having the shortest distance from the outer peripheral surface (hereinafter, referred to as “first lead wire”) is disconnected as the roller is worn. As a result, it can be determined that the wear of the roller portion 64 has progressed to the first lead wire. Further, as the wear progresses, the lead wire 85 (hereinafter, referred to as “second lead wire”) having the second shortest distance from the outer peripheral surface among the plurality of lead wires 85 is broken as the rollers are worn. As a result, it can be determined that the wear of the roller portion 64 has progressed to the second lead wire. As described above, in the present embodiment, the progress of wear of the roller portion 64 can be detected in detail.

In the present embodiment, the hole portion 84 is provided with a partition wall 86 that separates the space on the outer peripheral surface side and the space on the central axis C2 side. When the wear of the outer peripheral surface of the roller portion 64 progresses and the wear reaches the bottom surface portion (end portion on the outer peripheral surface side) of the hole portion 84, the bottom surface portion disappears. By eliminating the bottom surface portion, the space on the outer peripheral surface side of the roller portion 64 (that is, the internal space of the housing 11) and the space partitioned by the hole portion 84 (hereinafter, referred to as “hole portion space”) are communicated with each other. To do. As a result, the solid fuel in the internal space flows into the hole space, but the solid fuel that has flowed in is hindered by the partition wall 86. Therefore, the inflow of solid fuel into the hole 84 can be suppressed. Therefore, it is possible to prevent the detection unit 81 arranged in the hole portion 84 from being damaged by the solid fuel that has entered the hole portion 84.

In the present embodiment, the crushed solid fuel is discharged from the outlet 19 provided in the upper part of the housing 11 by the transport gas supplied from the lower side of the rotary table 12. That is, the transport gas flows from the bottom to the top in the housing 11. As a result, the temperature of the high-temperature transport gas decreases from the bottom to the top by exchanging heat with the crushed solid fuel. In this embodiment, the receiving unit 90 is provided on the upper part of the housing 11 which is above the rotary table 12. As a result, the receiving unit 90 conducts heat to the receiving unit 90 in a state where the temperature of the transport gas is lowered. As a result, the receiving unit 90 is unlikely to reach a high temperature, so that damage to the receiving unit 90 due to the high temperature can be suppressed.

In the present embodiment, the seal gas supply pipe 92 supplies the seal gas to the accommodation space accommodating the receiving unit 90. Although the accommodation space and the internal space of the housing 11 are communicated with each other, the atmospheric gas in which the crushed solid fuel powder is present in the internal space inside the housing 11 is prevented from directly entering the accommodation portion 91. That is, a part of the seal gas filled in the accommodation space is moved to the internal space. As a result, the atmospheric gas in which the solid fuel powder is present from the internal space to the accommodation space is pushed back to the internal space by the seal gas. Therefore, it is possible to prevent the crushed solid fuel powder from flowing into the accommodation space. Therefore, the receiving unit 90 can be made less likely to be damaged by the solid fuel scattered in the internal space. Further, since the temperature of the accommodation space can be lowered by the seal gas filled in the accommodation space, damage to the receiving unit 90 due to the high temperature can be further suppressed.
Further, in the present embodiment, since the accommodation space communicates with the internal space, the communication transmitted wirelessly from the transmission unit 82 reaches the reception unit 90 without being interrupted. Therefore, damage to the receiving unit 90 can be suppressed without affecting the transmission / reception between the transmitting unit 82 and the receiving unit 90.
Further, by providing the partition window 93, it is possible to suppress the inflow of solid fuel powder into the accommodation space. Further, since the partition window 93 transmits wireless communication, damage to the receiving unit 90 can be suppressed without affecting the communication transmitted and received wirelessly between the transmitting unit 82 and the receiving unit 90. ..

Further, in the present embodiment, the remaining life of the roller portion 64 is estimated based on the amount of wear of the roller portion 64. Therefore, the accuracy of estimating the remaining life can be improved in response to fluctuations in the operating state of the solid fuel crusher 100 provided with the roller portion 64. By estimating the remaining life more accurately, it is possible to carry out maintenance (repair, replacement, etc.) of the roller portion 64 at a more appropriate timing without giving a margin longer than necessary for the remaining life. That is, since the maintenance frequency can be reduced, the solid fuel crushing device 100 can be operated for a longer period of time. Therefore, the maintenance cost can be reduced. In addition, the operating rates of the solid fuel crusher 100 and the power plant 1 can be improved.

Further, in the present embodiment, the future transition of the remaining life can be predicted from the transition of the remaining life estimated by the estimation unit 53 based on the database in which the operating state and the remaining life transition characteristic are associated with each other. It is possible to more accurately predict the transition of the remaining life in the future, and it is possible to carry out maintenance (replacement, etc.) of the roller portion 64 at a more appropriate timing. That is, since the roller portion 64 can be used for a longer period of time, the maintenance frequency can be reduced. Therefore, the maintenance cost can be reduced. In addition, the operating rates of the solid fuel crusher 100 and the power plant 1 can be improved.

In the present embodiment, at least one of information on the type of solid fuel, the cumulative operating time, and the operating load is used as the operating state of the solid fuel crushing device 100. Information on the type of solid fuel, cumulative operating time, and operating load is a factor that affects the remaining life. Therefore, it is possible to effectively predict the transition of the remaining life in the future.

In the present embodiment, by creating a maintenance plan based on the estimated remaining life, it is possible to make a plan with a margin in the maintenance time. Therefore, the operating rates of the solid fuel crusher 100 and the power plant 1 can be improved. In the maintenance plan, for example, maintenance time, an operation plan for adjusting the maintenance time (for example, change of the type of solid fuel, etc.), load sharing adjustment in a plurality of solid fuel crushers, and the like can be performed.

The present disclosure is not limited to the above embodiment, and can be appropriately modified without departing from the gist thereof.
For example, a wear sensor may be provided in addition to the roller portion 64. For example, in addition to the roller unit 64, a wear sensor (second detection unit) (not shown) may be provided on the table liner 12a installed on the rotary table 12. In this case, the wear information of the table liner 12a can be received by the receiving unit and the information can be obtained by the transmitting unit (second transmitting unit) and the receiving unit (not shown). Further, a wear sensor (third detection unit) (not shown) may be provided on the drift plate liner 15a attached to the drift plate 15 installed on the inner peripheral surface 11a of the housing 11. In this case, the wear information of the table liner 12a can be received by the receiving unit and the information can be obtained by the transmitting unit (third transmitting unit) and the receiving unit (not shown). Further, the wear sensor can be provided on the wear member existing in the solid fuel crusher 100 in addition to the locations described above. The receiving unit that receives the wear information of each wear member (table liner 12a or drift plate liner 15a) may be shared with the receiving unit 90 that receives the wear information of the roller unit 64. With this configuration, it is possible to monitor the wear status of the wear member existing in the solid fuel crusher 100 with a minimum of equipment.
When a wear sensor is provided on a wear member such as a table liner 12a or a drift plate liner 15a, the wear sensor is installed in the same rotating body such as the bottom surface of the table liner 12a or the upper surface of the rotary table 12 in the rotary table 12. It may be installed anywhere as long as there is no risk of damage to the wear sensor due to progress of wear. In the drift plate liner 15a, since the drift plate 15 is a non-rotating portion, it is desirable to provide a wear sensor in the immediate vicinity of the wear member. It is desirable to provide a wear sensor on the plate 15 main body side.

The method for detecting the amount of wear of the solid fuel crushing apparatus and the boiler system and the crushing roller described in each of the above-described embodiments is grasped as follows, for example.
The solid fuel crusher (100) according to one aspect of the present disclosure includes a housing (11) forming an outer shell and a rotary table (12) on which the solid fuel supplied in the housing (11) is placed. A crushing roller (13, 64) that is rotatable about the central axis (C2) and presses and crushes the solid fuel placed on the rotary table (12), and the crushing roller (13). , 64), the first detection unit (81) for detecting the amount of wear of the crushing roller (13, 64), and the first detection unit (13, 64) fixed to the crushing roller (13, 64). It includes a first transmitting unit (82) that transmits the information detected by the 81) by wireless communication, and a receiving unit (90) that receives the information transmitted from the first transmitting unit (82).

In the above configuration, the first transmitting unit transmits the amount of wear of the crushing roller detected by the first detecting unit to the receiving unit. As a result, the amount of wear of the crushing roller can be detected and monitored without stopping the solid fuel crushing device.
In addition, the first transmitting unit transmits the amount of wear to the receiving unit by wireless communication. That is, the first transmitting unit and the receiving unit are not connected by a lead wire or the like. Therefore, the structure can be simplified. In addition, since it is not necessary to consider the routing of the lead wire, the installation work can be simplified.
Further, since the first transmitter is not provided with consumables, the running cost is compared with the configuration in which the first transmitter and the receiver are provided with consumables such as a slip ring when connected by a lead wire or the like. Can be reduced.

Further, in the solid fuel crushing apparatus (100) according to one aspect of the present disclosure, a plurality of the first detection units (81) are provided, and the plurality of the first detection units (81) are provided with the central axis (C2). They are arranged apart from each other in the direction along the above, and are arranged apart from each other in the circumferential direction of the crushing rollers (13, 64).

In the above configuration, the plurality of first detection units are arranged apart from each other in the direction along the central axis and are arranged apart from each other in the circumferential direction of the crushing roller. As a result, the amount of wear of the crushing roller can be detected in a wide range in the direction along the central axis. In addition, the amount of wear of the crushing roller can be detected in a wide range in the circumferential direction.
Further, by centrally providing the plurality of first detection portions on the crushing roller, the strength of the portions where the plurality of first detection portions are centrally provided may decrease. For example, when the first detection unit (the portion where the strength decreases) is lined up in the direction of the central axis, the crushing roller may be damaged or the like with the portion as the base point. In such a case, in the above configuration, since the first detection unit is dispersed, the portion where the strength may decrease can be dispersed in the direction along the central axis of the crushing roller and in the circumferential direction. Therefore, it is possible to suppress a decrease in the strength of the crushing roller.

Further, in the solid fuel crushing apparatus (100) according to one aspect of the present disclosure, at least one of the plurality of first detection units (81) is most worn in the direction along the central axis (C2). It is provided at a position where it is easy to wear or where it is assumed that it is most easily worn.

In the above configuration, at least one of the plurality of first detection units is provided at a position that is most likely to be worn or a position that is expected to be most worn in the direction along the central axis. As a result, the degree of progress of wear of the crushing roller at the initial stage of wear of the crushing roller can be accurately grasped.

Further, in the solid fuel crushing apparatus (100) according to one aspect of the present disclosure, the first detection unit (81) is located closer to the central axis (C2) side than the outer peripheral surface of the crushing rollers (13, 64). The plurality of conductors (85) are arranged so that the distances from the end portion on the outer peripheral surface side to the outer peripheral surface of the crushing rollers (13, 64) are different from each other. Has been done.

In the above configuration, the first detection unit has a plurality of conducting wires having different distances to the outer peripheral surface of the crushing roller. As the wear of the outer peripheral surface of the crushing roller progresses, first, among the plurality of lead wires, the lead wire having the shortest distance from the outer peripheral surface (hereinafter, referred to as “first lead wire”) is disconnected as the roller wears. As a result, it can be determined that the wear of the crushing roller has progressed to the first lead wire. Further, as the wear progresses, the wire having the second shortest distance from the outer peripheral surface (hereinafter, referred to as “second wire”) among the plurality of wires breaks as the roller wears. As a result, it can be determined that the wear of the crushing roller has progressed to the second lead wire. As described above, in the above configuration, the progress of wear of the crushing roller can be detected in detail.

Further, in the solid fuel crushing apparatus (100) according to one aspect of the present disclosure, the crushing roller (13, 64) is subjected to the crushing roller (13, 64) from the central axis (C2) side to the outer peripheral surface side of the crushing roller (13, 64). A hole portion (84) extending toward the hole is formed, the first detection portion (81) is arranged in the hole portion (84), and the hole portion (84) has the hole portion. A partition wall (86) is provided that separates the space partitioned by (84) from the space on the outer peripheral surface side and the space on the central axis (C2) side.

In the above configuration, a partition wall is provided in the hole portion to separate the space on the outer peripheral surface side and the space on the central axis side. When the wear of the outer peripheral surface of the crushing roller progresses and the wear reaches the bottom surface of the hole (the end portion on the outer peripheral surface side), the bottom surface disappears. When the bottom surface disappears, the space on the outer peripheral surface side of the crushing roller (that is, the internal space of the housing) and the space partitioned by the holes (hereinafter, referred to as "hole space") communicate with each other. As a result, the solid fuel in the internal space flows into the recessed space, but the solid fuel that has flowed in is hindered by the partition wall. Therefore, the inflow of fixed fuel into the hole can be suppressed. Therefore, it is possible to prevent the first detection unit arranged in the hole from being damaged by the solid fuel that has entered the recess.

Further, the solid fuel crushing device (100) according to one aspect of the present disclosure is provided on the upper part of the housing (11), and the solid fuel crushed by the crushing rollers (13, 64) is crushed by the housing (11). ), And the solid fuel provided vertically below the rotary table (12) and crushed by the crushing rollers (13, 64) to the discharging part (19). The transport gas supply unit (27) for supplying the transport gas to be transported to the inside of the housing (11) is provided, and the receiving unit (90) is the rotary table (11) in the housing (11). It is provided vertically above 12).

In the above configuration, the crushed solid fuel is discharged from the outlet portion provided in the upper part of the housing by the transport gas supplied from the lower side of the rotary table. That is, the transport gas flows from the bottom to the top in the housing. As a result, when the transport gas is hot (at least when the temperature is higher than the crushed solid fuel), the transport gas moves from the bottom to the top by exchanging heat with the crushed solid fuel, and therefore the temperature. Decreases. In the above configuration, the receiving unit is provided above the rotary table in the housing. As a result, the transport gas conducts heat to the receiving unit in a state where the temperature is lowered. As a result, the receiving unit is unlikely to reach a high temperature, so that damage to the receiving unit due to the high temperature can be suppressed.

Further, the solid fuel crusher (100) according to one aspect of the present disclosure includes an accommodating portion (91) forming an accommodating space for accommodating the receiving unit (90) and a seal gas for supplying a seal gas to the accommodating space. A supply unit (92) is provided, and the accommodation space communicates with an internal space formed inside the housing (11).

In the above configuration, the seal gas supply unit supplies the seal gas to the accommodation space that accommodates the receiving unit. Since the accommodation space and the internal space are in communication with each other, a part of the seal gas filled in the accommodation space moves to the internal space. As a result, the crushed solid fuel powder from the internal space inside the housing toward the accommodation space is pushed back into the internal space by the seal gas. Therefore, it is possible to prevent the crushed solid fuel powder from flowing into the accommodation space. Therefore, the receiving unit can be made less likely to be damaged by the solid fuel powder. Further, since the temperature of the accommodation space can be lowered by the seal gas filled in the accommodation space, damage to the receiving portion due to the high temperature can be suppressed.
Further, in the above configuration, since the accommodation space communicates with the internal space, the radio transmitted from the first transmission unit reaches the reception unit without being interrupted. Therefore, damage to the receiving unit can be suppressed without affecting the transmission / reception between the first transmitting unit and the receiving unit.

Further, the solid fuel crusher (100) according to one aspect of the present disclosure estimates the remaining life of the crushing rollers (13, 64) based on the amount of wear detected by the first detection unit (81). It has a part (53).

In the above configuration, the remaining life of the crushing roller is estimated based on the amount of wear of the crushing roller. Therefore, the accuracy of estimating the remaining life can be improved in response to fluctuations in the operating state of the solid fuel crusher provided with the crushing roller. By estimating the remaining life more accurately, maintenance (replacement, etc.) of the crushing roller can be performed at a more appropriate timing. That is, since the crushing roller can be used for a longer time, the maintenance frequency can be reduced. Therefore, the maintenance cost can be reduced. In addition, the operating rate of the solid fuel crusher can be improved.

Further, the solid fuel crusher (100) according to one aspect of the present disclosure is described in the estimation unit (53) based on a database in which an operating state and a remaining life transition characteristic corresponding to the operating state are accumulated in advance. It is equipped with a prediction unit (54) that predicts future changes in remaining life from the estimated changes in remaining life.

In the above configuration, the future transition of the remaining life can be predicted from the transition of the remaining life estimated by the estimation unit based on the database in which the operating state and the remaining life transition characteristic are associated with each other. It is possible to predict the transition of the remaining life in the future more accurately, and to carry out maintenance (replacement, etc.) of the crushing roller at a more appropriate timing. That is, since the crushing roller can be used for a longer time, the maintenance frequency can be reduced. Therefore, the maintenance cost can be reduced. In addition, the operating rate of the solid fuel crusher can be improved.

Further, in the solid fuel crusher (100) according to one aspect of the present disclosure, the operating state includes at least one of information regarding the type of solid fuel, the cumulative operating time, and the operating load.

In the above configuration, at least one of information on the type of solid fuel, the cumulative operating time, and the operating load is used as the operating state. Information on the type of solid fuel, cumulative operating time, and operating load is a factor that affects the remaining life. Therefore, it is possible to effectively predict the transition of the remaining life in the future.

In addition, the solid fuel crusher (100) according to one aspect of the present disclosure includes a planning unit (55) that creates a maintenance plan based on the estimated remaining life.

In the above configuration, by creating a maintenance plan based on the estimated remaining life, it is possible to make a plan with a margin in the maintenance time. Therefore, the operating rate of the solid fuel crusher can be improved. In the maintenance plan, for example, maintenance time, an operation plan for adjusting the maintenance time (for example, change of the type of solid fuel, etc.), load sharing adjustment in a plurality of fixed fuel crushers, and the like can be performed.

Further, the solid fuel crusher (100) according to one aspect of the present disclosure includes a table liner (12a) fixed to the upper surface of the rotary table (12) and rotating together with the rotary table (12), and the table liner (12a). A second detection unit that detects the amount of wear of 12a) and a second transmission unit that transmits information detected by the second detection unit by wireless communication are provided, and the reception unit (90) is the second transmission unit. Receive the information sent from the department.

With the above configuration, the amount of wear of the table liner can be detected and monitored without stopping the solid fuel crusher. In addition, the information detected by the second detection unit is also received by the receiving unit that receives the information detected by the first detection unit. As a result, the number of parts is reduced and the configuration is simplified as compared with the case where the receiving unit for receiving the information of the first detection unit and the receiving unit for receiving the information of the second detection unit are separately provided. be able to.

Further, the solid fuel crusher (100) according to one aspect of the present disclosure is provided in the housing (11) and is a drift plate (11) that diverts the flow of the transport gas flowing in the housing (11). 15), a drift plate liner (15a) fixed to the surface of the drift plate (15), a third detection unit for detecting the amount of wear of the table liner (15a), and the third detection unit detected. The receiving unit (90) includes a third transmitting unit that transmits information by wireless communication, and the receiving unit (90) receives the information transmitted from the third transmitting unit.

With the above configuration, the amount of wear of the drift plate liner can be detected and monitored without stopping the solid fuel crusher. In addition, the information detected by the third detection unit is also received by the receiving unit that receives the information detected by the first detection unit. As a result, the number of parts is reduced and the configuration is simplified as compared with the case where the receiving unit for receiving the information of the first detection unit and the receiving unit for receiving the information of the third detection unit are separately provided. be able to.

The boiler system (1) according to one aspect of the present disclosure burns the solid fuel crusher (100) according to any one of the above and the solid fuel crushed by the solid fuel crusher (100) to generate steam. It is equipped with a boiler to generate.

The method for detecting the amount of wear of the crushing rollers (13, 64) according to one aspect of the present disclosure is such that the crushing rollers (13, 64) are rotatably arranged around the central axis (C2) inside the housing (11) forming the outer shell, and the rotary table (13, 64). 12) This is a method for detecting the amount of wear of the crushing rollers (13, 64) that crush the solid fuel placed on the crushing rollers (13, 64), and the crushing rollers (81) provided in the crushing rollers (13, 64). The information detected by the detection unit (81) is transmitted by wireless communication by the step of detecting the amount of wear of (13, 64) and the transmission unit (82) fixed to the crushing roller (13, 64). The step of receiving the information transmitted from the transmitting unit (82) by the receiving unit (90) is provided.

1: Power plant (boiler system)
10: Mill 11: Housing
11a: Inner peripheral surface 11b: Side surface portion 12: Rotating table 12a: Table liner 13: Roller (crushing roller)
14: Drive unit 15: Flow plate 15a: Flow plate liner 16: Rotary classifier 16a: Blade 17: Fuel supply unit 18: Motor 19: Outlet (discharge unit)
20: Coal supply machine 21: Bunker 22: Conveying unit 23: Motor 24: Down spout unit 25: Air outlet 26: Vane 27: Primary air duct (conveying gas supply unit)
30: Blower 30a: Hot gas flow path 30b: Cold gas flow path 30c: Hot gas damper 30d: Cold gas damper 31: Primary air ventilator 32: Push-in air ventilator 34: Heat exchanger 40: State detection unit 41: Bottom 42 : Ceiling 45: Journal head 46: Journal shaft 47: Support arm 48: Support shaft 49: Pressing device 50: Control unit 52: Acquisition unit 53: Estimating unit 54: Prediction unit 55: Planning unit 63: Journal housing 64: Roller Unit 80: Wear sensor 81: Detection unit (first detection unit)
82: Transmitter (second detector)
83: Storage part 84: Hole part 85: Lead wire 86: Partition wall 86a: First partition wall 86b: Second partition wall 86c: Third partition wall 90: Reception part 91: Storage part 92: Seal gas supply pipe (seal gas supply part)
93: Partition window 94: Reception antenna unit 95: Information transmission / reception unit 100: Solid fuel crusher 100a: Primary air flow path 100b: Supply flow path 101: Information aggregation system 102: Server 103: Planning system 200: Boiler 210: Fireplace 220: Burner section

Further, the solid fuel crusher (100) according to one aspect of the present disclosure is provided in the housing (11) and is a drift plate (11) that diverts the flow of the transport gas flowing in the housing (11). 15), a drift plate liner (15a) fixed to the surface of the drift plate (15), a third detection unit that detects the amount of wear of the drift plate liner (15a), and the third detection unit detect. The receiving unit (90) receives the information transmitted from the third transmitting unit, including a third transmitting unit that transmits the collected information by wireless communication.

Claims (15)

The housing that forms the outer shell and
A rotary table on which the solid fuel supplied in the housing is placed, and
A crushing roller that can rotate around the central axis and presses and crushes the solid fuel placed on the rotary table.
A first detection unit provided on the crushing roller and detecting the amount of wear of the crushing roller,
A first transmission unit fixed to the crushing roller and transmitting information detected by the first detection unit by wireless communication.
A solid fuel crushing device including a receiving unit for receiving the information transmitted from the first transmitting unit. A plurality of the first detection units are provided.
The solid fuel crushing apparatus according to claim 1, wherein the plurality of first detection units are arranged apart from each other in a direction along the central axis and are arranged apart from each other in a circumferential direction of the crushing roller. The solid according to claim 2, wherein at least one of the plurality of first detection units is provided at a position most likely to be worn or a position assumed to be most easily worn in a direction along the central axis. Fuel crusher. The first detection unit has a plurality of conducting wires located on the central axis side of the outer peripheral surface of the crushing roller.
The solid fuel crushing according to any one of claims 1 to 3, wherein each of the plurality of the conducting wires is arranged so that the distance from the end portion on the outer peripheral surface side to the outer peripheral surface of the crushing roller is different. apparatus. The crushing roller is formed with a hole extending from the central axis side toward the outer peripheral surface side of the crushing roller.
The first detection unit is arranged in the hole portion, and the first detection unit is arranged in the hole portion.
According to any one of claims 1 to 4, the hole portion is provided with a partition wall that separates the space partitioned by the hole portion from the space on the outer peripheral surface side and the space on the central axis side. The solid fuel crusher described. A discharge unit provided on the upper part of the housing and discharging the solid fuel crushed by the crushing roller to the outside of the housing.
It is provided vertically below the rotary table, and includes a transport gas supply unit that supplies the transport gas that transports the solid fuel crushed by the crushing roller to the discharge unit inside the housing.
The solid fuel crushing device according to any one of claims 1 to 5, wherein the receiving unit is provided in the housing vertically above the rotary table. An accommodating portion forming an accommodating space for accommodating the receiving unit,
A seal gas supply unit that supplies seal gas to the accommodation space is provided.
The solid fuel crushing apparatus according to any one of claims 1 to 6, wherein the accommodation space communicates with an internal space formed inside the housing. The solid fuel crushing apparatus according to any one of claims 1 to 7, further comprising an estimating unit for estimating the remaining life of the crushing roller based on the amount of wear detected by the first detecting unit. A claim including a prediction unit that predicts a future transition of the remaining life from the transition of the remaining life estimated by the estimation unit based on a database in which the operating state and the remaining life transition characteristic corresponding to the operating state are accumulated in advance. Item 8. The solid fuel crusher according to item 8. The solid fuel crusher according to claim 9, wherein the operating state includes at least one of information regarding the type of solid fuel, the cumulative operating time, and the operating load. The solid fuel crushing apparatus according to any one of claims 8 to 10, further comprising a planning unit for creating a maintenance plan based on the estimated remaining life. A table liner fixed to the upper surface of the rotary table and rotating together with the rotary table,
A second detection unit that detects the amount of wear of the table liner, and
A second transmission unit that transmits information detected by the second detection unit by wireless communication is provided.
The solid fuel crushing device according to any one of claims 1 to 11, wherein the receiving unit receives information transmitted from the second transmitting unit. A drift plate provided in the housing and diverts the flow of transport gas flowing in the housing, and
The drift plate liner fixed to the surface of the drift plate and
A third detection unit that detects the amount of wear of the table liner, and
A third transmission unit that transmits information detected by the third detection unit by wireless communication is provided.
The solid fuel crushing device according to any one of claims 1 to 12, wherein the receiving unit receives information transmitted from the third transmitting unit. The solid fuel crusher according to any one of claims 1 to 13.
A boiler system including a boiler that burns solid fuel crushed by the solid fuel crusher to generate steam. It is a method of detecting the amount of wear of a crushing roller that is rotatably arranged around the central axis inside the housing forming the outer shell and crushes the solid fuel placed on the rotary table.
A step of detecting the amount of wear of the crushing roller by a detection unit provided on the crushing roller, and
A step of transmitting information detected by the detection unit by wireless communication by a transmission unit fixed to the crushing roller, and
A method for detecting the amount of wear of a crushing roller, comprising a step of receiving information transmitted from the transmitting unit by the receiving unit.

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