JP3045716B1 - Detecting device for stored amount of powder - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To accurately detect a stored amount of a granular material in a bunker. SOLUTION: The stored amount of the granular material in each of the bunkers 19A to 19F is detected by each of the ultrasonic detecting means 40A to 40F, and the charged amount detected by the charged amount measuring device 41 and each of the measuring devices. It is calculated by the storage amount calculation means 43 based on the payout amounts detected by 42A to 42F. The smaller of these stored amounts is selected by the low-level selector 44. This makes it possible to accurately detect the stored amount of the granular material in each of the bunkers 19A to 19F, and the stored amount of the granular material in each of the bunkers 19A to 19F is always detected on the safe side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the amount of stored granular material, and more particularly, to a granular material suitably used for automating a charging operation of a granular material such as coal into a bunker. Related to a storage amount detection device.

[0002]

2. Description of the Related Art In order to regulate the amount of coal supplied to a boiler in a coal-fired power plant, a system for supplying coal to a boiler is upstream of a coal feeder that supplies coal to the boiler. A bunker having a coal storage capacity equivalent to approximately 15 hours will be installed. In the bunker, coal is charged and stored from a coal storage facility such as a silo having a coal storage capacity equivalent to one to two months via a dispensing facility including a dispensing machine and a conveyor. In the daytime, the coal in the bunker is supplied to the boiler via a coal feeder, and the dispensing facility is started to load the coal into the bunker. At night, only coal stored in the bunker is supplied to the boiler.

In recent coal-fired power plants, it is desired to reduce the coal storage capacity of bunker in order to reduce equipment costs. By reducing the coal storage capacity of the bunker, the frequency of starting / stopping the dispensing facility increases, and it is necessary to start / stop the dispensing facility even at night, and automation of the charging operation of coal is desired.

[0004] In order to automate the charging operation of coal, means for detecting a predetermined upper limit storage amount of the bunker and means for detecting a predetermined lower limit storage amount that is less than the upper limit storage amount of the bunker are required. More specifically, when the coal storage amount is less than the lower limit storage amount, the dispensing facility is activated, and when the coal storage amount is equal to or greater than the upper limit storage amount, the dispensing facility is stopped to automate the coal charging operation. Can be realized. In particular, an ultrasonic level meter provided above the bunker is used for detecting the lower limit storage amount.

Japanese Unexamined Patent Publication (Kokai) No. 61-124434 discloses a bunker control system for controlling the amount of coal stored in a plurality of bunkers within a predetermined range. In this bunker control system, the storage target value is calculated based on the amount of coal input to the bunker, the amount of coal discharged from the bunker, the lower limit storage amount in the bunker, and the input interval time, and the actual storage amount in the bunker is calculated. When the storage target value is met, the input of coal is switched to another bunker, and the above-described operation is repeated to control the input of coal to each bunker up to the upper limit storage amount. The actual storage amount of the bunker can be obtained from the shape of the bunker and the storage level of coal in the bunker. An ultrasonic level gauge is provided above the bunker to measure the storage level.

[0006]

In the above-mentioned prior art, the ultrasonic level meter increases the measurement error as the distance to the surface of the coal to be measured increases, and accurately measures the coal storage level. Therefore, there is a problem that the stored amount cannot be accurately detected.
Also, coal may form a bridge in the bunker, and the ultrasonic level meter detects this bridge, and it is erroneously detected that more coal is stored in the bunker than the actual storage amount, and accurate. There is a problem that the stored amount cannot be detected. These problems may cause the bunker to become empty.

Further, it is necessary to perform maintenance and inspection of the dispensing facility at regular intervals every day. During maintenance and inspection, the coal to be supplied to the boiler during maintenance and inspection must be secured in the bunker, and it is necessary to know the amount of coal stored in the bunker. In the prior art, the amount of coal stored in the bunker cannot be accurately detected, so it is difficult to secure the required amount of coal in the bunker on a regular basis, and it is difficult to perform maintenance and inspection of the dispensing equipment on a regular basis. There is a problem.

An object of the present invention is to provide an apparatus for detecting a storage amount of a granular material capable of accurately detecting the storage amount of the granular material in a bunker.

Another object of the present invention is to accurately detect the storage amount of the granular material in the bunker, and to store the granular material in the bunker so that the granular material is stored within a predetermined range. It is an object of the present invention to provide a supply facility for powders that can be charged.

[0010] Still another object of the present invention is to accurately detect the amount of powder and granules stored in a bunker, and to secure the amount of powder and granules necessary for maintenance and inspection of components in the bunker at a regular time every day. It is an object of the present invention to provide a powder and granular material supply facility capable of performing the above-mentioned processes.

[0011]

SUMMARY OF THE INVENTION According to the present invention, there is provided a charging means for charging a granular material from above into a hollow inverted pyramidal bunker extending vertically, and discharging and discharging the granular material from a lower portion of the bunker. The apparatus for detecting the amount of stored powder and granular material in the bunker is provided in the supply facility for the powder and granular material including the dispensing means that performs the above operation. And based on the time difference corresponding to the distance from the generation to reception of the ultrasonic wave by receiving the reflected wave from the granular material,
Ultrasonic wave detecting means for detecting the storage amount of the granular material in the bunker, charged amount detecting means for detecting the charged amount of the granular material from the charging means to the bunker, and discharging from the bunker by the discharging means Discharge amount detection means for detecting the discharge amount of the powder and granules, and storage amount calculation for calculating the storage amount of the powder and granules stored in the bunker in response to each output of the charging amount detection means and the discharge amount detection means Means, in response to each output of the ultrasonic detecting means and the stored amount calculating means, the smaller one of the stored amount detected by the ultrasonic detecting means and the stored amount calculated by the stored amount calculating means. A low-level selector that outputs a signal representing the following condition: Means and bunker of powder and granular material stored in discharge means It is characterized by including a granular material surface position detecting means for detecting a position of a surface exposed outside the lower end, and an alarm generating means for generating an alarm when the position is equal to or less than a predetermined value. This is a device for detecting the amount of stored powder.

According to the present invention, the charged amount of the granular material into the bunker is detected by the charged amount detecting means. The powder is charged into the bunker by the charging means and stored in the bunker. The powder and granules stored in the bunker are discharged from the lower part of the bunker by the discharging means and discharged, and the discharged amount is detected by the discharged amount detecting means. The storage amount of the granular material in the bunker was detected by the ultrasonic detection means, calculated by the storage amount calculation means based on the charging amount and the discharge amount, and detected by the ultrasonic detection means by the low-order selector. The smaller of the storage amount and the storage amount calculated by the storage amount calculation means is selected. Even if the storage amount of the granular material in the bunker is reduced by this and the storage amount cannot be accurately detected by the ultrasonic detection means, by using the storage amount calculated by the storage amount calculation means, The stored amount of the granular material in the bunker can be accurately detected. At the same time, the smaller of the storage amount detected by the ultrasonic detector and the storage amount calculated by the storage amount calculation means is selected, so that the storage amount of the granular material in the bunker is always safe. For example, even if the inside of the bunker is empty, it is possible to prevent that the granular material is stored in the bunker.

[0013]

Further, the powder and granules stored in the bunker are guided to discharge means and stored. The surface of the powder and granules stored in the discharging means, which is exposed outside the lower end of the bunker, forms a repose angle, and is discharged by the discharging means. In addition, the position of the surface of the granular material stored in the discharging means is always constant as long as the granular material is stored in the bunker. When the inside of the bunker becomes empty, the surface of the granular material stored in the discharging means is displaced downward from the lower end surface, and the position of the surface is equal to or less than a predetermined value. When detected by the alarm, the alarm generation means generates an alarm. In this way, the level discrimination of the granular material in the bunker is performed.

At the lower end of the bunker, there is provided a discharge means for storing the particulate material from the bunker. Therefore, even if the inside of the bunker is emptied, the discharge means stores the powder material. It is possible to secure the time required for charging the granular material into the inside.

Further, the position of the surface of the granular material stored in the discharging means, which is exposed outward from the lower end of the bunker, is detected by the granular material surface position detecting means, and the position of this surface is equal to or less than a predetermined value. When the alarm occurs, an alarm is generated by the alarm generating means. Therefore, even if the ultrasonic detection means and the storage amount calculation means fail to detect the storage amount of the granular material in the bunker, the storage is performed by the discharge means. By detecting that the position of the surface of the granular material is equal to or less than a predetermined value, it is possible to know that the inside of the bunker is empty, to generate an alarm, and to alert the worker. .

[0017] The dispensing means of the present invention is connected to a gas transport means for transporting the granular material to the boiler below the discharge means,
A gas-tight material seal is formed between the gas transport means and the discharge means in a state in which the powder material is filled inside to prevent the gas from the gas transport means from blowing up to the bunker, It enables the body to transport gas to the boiler itself.

The alarm can detect that the bunker body is empty at the time when the particulate matter remains in the discharge means. Therefore, the alarm allows the operator to maintain the material seal while maintaining the material seal. The driving operation for re-inserting the granular material into the bunker can be performed while the residual granular material is continuously supplied to the boiler.

That is, even if the ultrasonic detecting means and the storage amount calculating means break down and the storage amount in the bunker cannot be detected and the automatic start of the conveyor does not operate, the alarm can be used to stably operate the boiler. Does not affect

The present invention includes a charging means for charging a granular material into a hollow inverted pyramidal bunker extending vertically, and a discharging means for discharging and discharging the granular material from a lower part of the bunker. A device that is provided in a supply facility for powder and granules and detects the amount of stored powder and granules in the bunker, which is disposed above the bunker and emits ultrasonic waves to the powder and granules stored in the bunker, Based on the time difference corresponding to the distance from the generation of the ultrasonic wave to the reception of the reflected wave from the body, based on the ultrasonic detecting means for detecting the storage amount of the granular material in the bunker, and from the charging means to the bunker A charging amount detecting means for detecting a charging amount of the granular material;
A discharge amount detecting means for detecting a discharge amount of the granular material discharged from the bunker by the discharging means; and a discharge amount detecting means for responding to each output of the loading amount detecting means and the discharge amount detecting means, A storage amount calculating means for calculating the storage amount, and a storage amount detected by the ultrasonic detection means in response to each output of the ultrasonic detection means and the storage amount calculation means, and a storage amount calculated by the storage amount calculation means. And a low-level selector that outputs a signal indicating the smaller storage amount of the above, wherein the charging means includes a transporting means for transporting the granular material to the bunker, and the transporting means is a belt conveyor. The input detection means is
A weight detecting means provided at a fixed position below the conveyor belt of the belt conveyor and detecting a weight acting on the conveyor belt, a running speed detecting means for detecting a running speed of the conveyor belt, a weight detecting means and a running speed detecting means Calculating means for calculating the amount of the charged granular material by integrating the detected weight per unit time over a predetermined period in response to each output of the stored granular material. It is a detection device.

According to the present invention, the granular material is conveyed to the bunker by a belt conveyor constituting charging means. During the transportation of the granular material, the charged amount of the granular material is detected by the charged amount detecting means. More specifically, when the granular material passes over the weight detecting means, the weight of the granular material acting on the belt conveyor per unit traveling distance is detected. At the same time, the traveling speed of the belt conveyor is detected by the traveling speed detecting means. Each output of the weight detecting means and the traveling speed detecting means is inputted to the calculating means. The calculating means calculates the product of the outputs to obtain the detected weight per unit time, and integrates the detected weight over a predetermined period to obtain the charged amount of the granular material.

With this configuration, it is possible to continuously detect the charged amount of the granular material while transporting the granular material on the belt conveyor, and temporarily store the granular material in, for example, a bucket. The charging amount can be detected in a shorter time than when the charging amount is detected.

Further, the weight acting on the conveyor belt is detected by the weight detecting means, and the traveling speed of the conveyor belt is detected by the traveling speed detecting means. In addition, the fluctuating weight and speed can be reliably detected, whereby the detected weight per unit time can be accurately determined, and the charged amount of the granular material can be accurately determined.

Further, even if a plurality of bunkers are provided, the charging amount detecting means is provided upstream of the bunker in the charging direction of the granular material, so that one charging amount detecting means can charge each bunker. It is possible to detect the charged amount of the granular material to be charged, and to simplify the configuration.

According to the present invention, there are provided a charging means for charging a plurality of hollow inverted-cone-shaped bunkers with powdery material from an upper part thereof, and a plurality of discharging means for discharging and discharging the powdery material from a lower part of each bunker. In a powder and granular material supply facility, which is provided upstream of each bunker in the charging direction of the powder and granular material and is supplied from the component interlocking with the charging means and supplies the powder and granular material to each bunker, It is arranged above and emits ultrasonic waves to the granular material stored in each bunker, receives a reflected wave by the granular material, and based on a time difference corresponding to a distance from generation to reception of the ultrasonic wave, A plurality of ultrasonic detecting means for detecting a storage amount of the granular material in each bunker; a charging amount detecting means for detecting a charging amount of the granular material from the charging means to each bunker; and a dispensing means A plurality of payout amount detecting means for detecting each payout amount of the granular material to be paid out from each bunker by the A storage amount calculation unit that calculates a storage amount of the granular material stored in each bunker in response to each output of the charging amount detection unit and each of the payout amount detection units; an ultrasonic detection unit and a storage amount calculation unit A low-order selector that outputs a signal representing the smaller of the storage amount detected by the ultrasonic detection means and the storage amount calculated by the storage amount calculation means in response to each output of In response to the output of the ultrasonic detecting means, the storage amount of each bunker is compared with a predetermined upper limit storage amount, and when the storage amount of at least one of the granular materials in each bunker is equal to or more than the upper limit storage amount In response to the output of the low-level selector, a signal indicating that the amount is equal to or larger than the upper limit storage amount is output, and the storage amount of each bunker is compared with a predetermined lower limit storage amount that is less than the upper limit storage amount. Of at least one of the granules Discriminating means for outputting a signal indicating that the remaining amount is less than the lower limit storage amount when the remaining amount is less than the lower limit storage amount, and storing at least any one of the granular materials in response to the output of the discriminating means; When the amount is equal to or more than the upper limit storage amount, the charging destination of the granular material is switched, and when the storage amount of the granular material in all the bunkers to be charged is equal to or more than the upper limit storage amount, the charging means is stopped, and the Control means for controlling the operation of the charging means so as to activate the charging means when the storage amount of at least one of the powder and the granular material is less than the lower limit storage amount. Supply equipment.

According to the present invention, the storage amount of the granular material in each bunker is detected by each ultrasonic detecting means, and is calculated by the storage amount calculating means based on each charging amount and each discharging amount. You. The smaller one of the storage amount by the ultrasonic detection means and the storage amount by the storage amount calculation means in each bunker is selected by the low-order selector. Further, the storage amount by the ultrasonic detection means for each bunker is compared with an upper limit storage amount predetermined by the discrimination means.

When the storage amount of at least one of the granules in each bunker is equal to or greater than the upper limit storage amount, the operation of the charging means is controlled by the control means so as to switch the charging destination of the powder and granules. You. Further, when the storage amount of the granular material in all the bunkers to be charged is equal to or more than the upper limit storage amount, the operation of the charging means is controlled by the control means so as to stop the charging means. Further, the storage amount of the granular material for each bunker selected by the low-order selector is compared with a lower limit storage amount predetermined by the discriminating means. When the storage amount of at least one of the granules of each bunker is less than the lower limit storage amount, the control means activates the charging means,
The operation of the charging means is controlled.

The stored amount of each bunker is detected by the ultrasonic detecting means and calculated by the stored amount calculating means, and the smaller one of these two stored amounts is selected by the low-order selector. The storage amount can be detected with high accuracy. Also, the storage amount detected by each ultrasonic detection unit and the upper limit storage amount are compared by the discriminating unit, the storage amount selected by the low-order selector and the lower limit storage amount are compared by the discrimination unit, and the output of the discrimination unit is compared. In response, the control means controls the operation of the charging means,
The granules can be charged into the bunker such that the granules in each bunker are stored between the upper limit storage amount and the lower limit storage amount. Since the storage amount in the bunker can be accurately detected, the lower limit storage amount of the granular material can be reliably detected, and the granular material can be charged into each bunker day or night. Further, since the ultrasonic detection means is used for detecting the upper limit storage amount and the lower limit storage amount, there is no need to separately provide a means for detecting the upper limit storage amount and a means for detecting the lower limit storage amount, simplifying the configuration. Can be planned.

At the upper part of each bunker of the present invention, capacitance detecting means is provided. When the storage amount of the granular material is equal to or more than the upper limit storage amount, a signal indicating that the storage amount is equal to or more than the upper limit storage amount is output.

According to the present invention, the upper limit storage amount of the bunker is:
It is detected by the capacitance detecting means. More specifically, when the surface of the powder or granular material in the bunker reaches the space between the electrode and the peripheral wall of the bunker, the capacitance between the electrode and the peripheral wall of the bunker changes, and the capacitance detecting means detects the powder or granular material. A signal indicating that the storage amount is equal to or larger than the upper limit storage amount is output.

The capacitance detecting means detects that the storage amount of the granular material is equal to or larger than the upper limit storage amount based on the capacitance between the electrode and the peripheral wall of the bunker. The upper limit storage amount can be detected. As a result, the set value of the upper limit storage amount can be increased, and the effective storage amount of the bunker can be increased.

According to the present invention, time setting means for setting a predetermined maintenance start time for maintenance and inspection of components provided upstream of each bunker in the charging direction of the granular material, and clocking the time. In response to the clock means and the output of the low-order selector,
A first calculating means for calculating a time required for charging the granular material to each bunker to the upper limit storage amount based on the upper limit storage amount of each bunker and the storage amount of the granular material at the current time of each bunker A second calculating means for calculating the activation time of the charging means in response to each output of the time setting means and the first calculating means; And starting control means for outputting a signal for activating the charging means when the counted time exceeds the starting time calculated by the second calculating means.

According to the present invention, when a predetermined maintenance start time for maintenance of components is set in the time setting means, the activation control means reads the current time from the clock means, and the first arithmetic means reads the current time. In response to the output of the low-order selector, based on the upper limit storage amount of each bunker and the storage amount of the granular material at the current time of each bunker, to charge each bunker with the granular material up to the upper limit storage amount The required time is calculated, and the charging time, which is the calculation result, is output to the second calculating means. The second calculating means responds to the outputs of the time setting means and the first calculating means, and calculates the activation time of the charging means by subtracting the charging time from the maintenance and inspection time. The activation control means responds to each output of the clock means and the second arithmetic means and outputs a signal for activating the charging means to the control means when the current time has passed the activation time.

Since the amount of the powder and granular material stored in the bunker is accurately detected and the charging means is activated based on the current time, the maintenance inspection start time and the charging time, the components are not required until the maintenance inspection start time. During the maintenance and inspection period, the amount of powder and granules required can be secured in the bunker. Therefore, by setting the maintenance and inspection start time to a predetermined time, it is possible to secure a necessary amount of the granular material in the bunker during the maintenance and inspection period of the components at a regular time every day.

[0035] The charging means of the present invention comprises a conveying means for commonly transporting the granular material discharged from the constituent elements to each bunker, and a selective charging of the granular material transported by the transport means into each bunker. And a plurality of scraping plates.

According to the present invention, the granular material discharged from the component is conveyed to each bunker by the conveying means. The granular material transported by the transporting means is selectively loaded into each bunker by selectively driving a plurality of scraping plates. More specifically, when the storage amount of the granular material in an arbitrary bunker is less than the lower limit storage amount, the granular material is discharged from the constituent elements, and the conveying means and the scraping plate corresponding to the bunker are driven. Is done. The granular material conveyed by the conveying means is blocked by the driven scraping plate and charged into the bunker. When the storage amount of the granular material stored in the bunker becomes equal to or more than the upper limit storage amount, the driving of the driven scraping plate is stopped. When the storage amount of the granular material is less than the lower limit storage amount in the other bunker except for the bunker in which the granular material is inserted, the above-described operation is repeated. When the stored amount of the granular material in all the bunker to be charged is equal to or more than the upper limit stored amount, the discharging operation of the constituent elements and the driving of the conveying means and the driven scraping plate are stopped. In this way, the granular material is charged into the bunker to be charged.

The charging means conveys the powder and the granular material in common to each bunker by the conveying means and selectively charges the bunker with a plurality of scraping plates. The powder can be reliably charged. As a result, for maintenance and inspection of the bunker, it is possible to provide a rest bunker in which no powder is charged. Further, charging of the granular material into the bunker having reached the upper limit storage amount can be prevented, and the granular material can be prevented from overflowing from the bunker. Furthermore, even if the storage amount of the granular material in another bunker becomes smaller than the lower limit storage amount when the granular material is loaded in the bunker, the charging destination of the granular material should be easily changed. And the granules can be preferentially charged into other bunker. This can prevent another bunker from being emptied during the charging operation of the granular material.

In the present invention, a plurality of bunker groups comprising a plurality of bunkers are provided in the powder and granular material supply facility, and charging means are provided for each bunker group. Distributing means for mutually distributing the powder and granules between the charging means is provided.

According to the present invention, the powder and granular materials discharged from the constituent elements are distributed among the charging means and distributed by the distribution means and charged into each bunker group. As a result, even when the charging of the granular material is prohibited for any bunker group, for example, for maintenance and inspection, the corresponding charging means such that the distributing means loads the remaining bunker group. Can be distributed.

The present invention is characterized in that at the time of maintenance and inspection of components, each charging means is stopped at the same time.

According to the present invention, at the time of maintenance and inspection of components, each charging means is stopped at the same time, so that components linked to each charging means can be stopped at the same time.
Maintenance and inspection of components can be performed safely.

[0042]

FIG. 1 is a system diagram showing a simplified supply system 2 of a granular material provided with a granular material storage amount detection apparatus 1 according to an embodiment of the present invention. FIG. 1 is a system diagram showing a simplified configuration of a coal storage facility 3 including a powdery granule supply facility 2. The supply facility 2 including the granular material storage amount detection device 1 is provided in a coal storage facility 3 of a coal-fired power plant. The coal storage facility 3 is provided with two coal supply systems. In the coal storage facility 3, coal loaded on the ship 4 is unloaded by the unloader 5, distributed by the switching chutes 6, 7 for each supply system, and transferred via the belt conveyor 8 and the damper 9 (in the present embodiment). Is silo 1 of 4)
Store it in 0. Each silo 10 has a coal storage capacity corresponding to 1-2 months, for example, 70,000 tons.

The coal stored in each silo 10 is supplied to the supply facility 2 for each supply system via the dispensing facility 11. More specifically, the dispensing facility 11 is provided for each silo 10, a dispenser 12 that dispenses coal from each silo 10, a belt conveyor 13 that conveys the coal dispensed from each dispenser 12, Belt conveyor 1 that transports coal discharged from silo 10 for each supply system
4, a switching chute 15 for mutually distributing coal from each belt conveyor 13 to each belt conveyor 14, a vibration sieve 16 for classifying the coal conveyed by each belt conveyor 14 by vibration, and a vibration sieve 16 And a pulverizer 17 for pulverizing coal.

The coal discharged from each silo 10 by the discharging machine 12 is distributed to a belt conveyor 14 for each supply system via a belt conveyor 13 and a switching chute 15, and is conveyed to a vibrating sieve 16 by the belt conveyor 14. You. This coal is pulverized coal by vibrating sieve 16,
For example, a granular coal having a particle size of 20 mm or less,
Classified into lump coal having a particle size exceeding m. The pulverized coal and granular coal pass through the screen of the vibrating sieve 16, and the lump coal is pulverized by the pulverizer 17 and then supplied to the supply equipment 2 for each supply system. In the following description, pulverized coal and granular coal will be referred to as powder and granular material.

The supply equipment 2 includes a plurality (6 in this embodiment) of vertically inverted hollow inverted weight-shaped bunker (hereinafter sometimes simply referred to as a bunker) 19 for each supply system.
A charging means 22 for charging the granular material from an upper portion 21 thereof into a bunker group 20 composed of A, 19B, 19C, 19D, 19E, and 19F, and the granular material continuously from a lower end portion 23 of each of the bunkers 19A to 19F. (In the present embodiment, six), the coal feeders 24A, 24B,
24C, 24D, 24E, and 24F, respectively. Each bunker 19A to 19F is equivalent to 10 hours, for example, 75
Each has a storage capacity of 0t. Each coal feeder 24A-2
The 4F has a maximum payout capacity of, for example, 75 t / h.

The charging means 22 includes a first belt conveyor 25.
, The second belt conveyor 26, and the third belt conveyor 2
7 and scrapers 28A, 28B, 28C, 28D, 28E, which are a plurality (5 in this embodiment) of scraping plates.
And The first belt conveyor 25 is provided with each bunker 19A.
-19F is provided on the most upstream side in the charging direction. The second belt conveyor 26 is provided downstream of the first belt conveyor 25 in the loading direction. The third belt conveyor 27 is provided downstream of the second belt conveyor 26 in the loading direction and above the bunker group 20 so as to convey the powdery material in common to each of the bunkers 19A to 19F. The plurality of scrapers 28A to 28E are connected to the third belt conveyor 2
7 and is selectively loaded into the respective bunkers 19A to 19F. A distributor 29 is provided between the second belt conveyor 26 and the third belt conveyor 27. Distributor 2
Numeral 9 distributes the powdery material between the third belt conveyors 27 mutually. Each of the first to third belt conveyors 25 to 27 has a transfer capacity of, for example, 1000 t / h, and transfers the granular material at a constant speed.

Each of the scrapers 28A to 28E is provided above the third belt conveyor 27 so as to be able to move up and down freely.
Each of the scrapers 28A to 28E is
9 is selectively driven. Each scraper 28A ~
28E, for example, scraper 28
A is driven and descends in a direction approaching the third belt conveyor 27, and the first to
The granules conveyed by the third belt conveyors 25 to 27 are blocked, and the granules are charged into the bunker 19A corresponding to the scraper 28A. Each scraper 28A ~
When 28E is not driven, the granular material is
Will be charged.

Each of the coal feeders 24A to 24F is connected to a gas transport means 30 for transporting the granular material in a gaseous state. Gas transport means 30
Is connected to a pulverizer 31 for pulverizing the granular material. Crusher 31
Is connected to the boiler 32. The gas transport means 30 includes a plurality of discharge paths 3 connected to the discharge ports of the coal feeders 24A to 24F.
3A, 33B, 33C, 33D, 33E, 33F and a transport path 34 commonly connected to each of the discharge paths 33A to 33F.
And a pressure source 35 that supplies gas, for example, compressed air, to the transport path 34.

The storage amount detecting device 1 is provided with each of the bunkers 19A to 19A.
A plurality of ultrasonic detecting means 40A arranged above 9F,
40B, 40C, 40D, 40E, and 40F, a charged amount measuring device 41 as a charged amount detecting means, and a discharged amount measuring devices 42A, 42B, 42C, and 42 as a plurality of discharged amount detecting means.
D, 42E, 42F, storage amount calculating means 43, and low-order selector 44. Each ultrasonic detecting means 40A to 40F
Emits an ultrasonic wave to the granular material stored in each of the bunkers 19A to 19F, receives a reflected wave from the granular material, and, based on a time difference corresponding to a distance from generation to reception of the ultrasonic wave, The storage amount of the granular materials in the bunkers 19A to 19F is detected.

The charging amount measuring device 41 is provided on the first belt conveyor 25, and is provided from the charging means 22 to each of the bunkers 19 A to 1.
The amount of each of the powder and granules charged to 9F is detected. Each dispensing amount meter 42A-42F is interposed in each discharge path 33A-33F, and each bunker 19A-
The dispensed amount of the granular material dispensed from 19F is detected. The storage amount calculating means 43 calculates the storage amount of the granular material stored in each of the bunkers 19A to 19F in response to each output of the charging amount measuring device 41 and each of the payout amount measuring devices 42A to 42F. The low-order selector 44 is provided for each of the ultrasonic detecting means 40A to 40A.
F, and in response to each output of the storage amount calculating means 43, the smaller one of the storage amounts detected by the ultrasonic detecting means 40A to 40F and the storage amounts calculated by the storage amount calculating means 43, respectively. Outputs a signal indicating the storage amount.

The ultrasonic detecting means 40A includes an ultrasonic level meter 47A and a transducer 48A. The ultrasonic level meter 47A emits an ultrasonic wave to the granular material stored in the bunker 19A, receives a reflected wave from the granular material, measures a time difference from the generation of the ultrasonic wave to the reception, and measures the time difference. Sound level meter 4
The distance from 7A to the surface of the granular material is detected. Converter 4
8A responds to the output of the ultrasonic level meter 47A, and converts the distance into a stored amount of the granular material in the bunker 19A. The same applies to the remaining ultrasonic detecting means 40B to 40F.

The lower end 23 of each of the bunkers 19A to 19F,
A hollow inverted cone is formed between each of the coal feeders 24A to 24F and surrounds a lower end portion 23 of each of the bunkers 19A to 19F with an outer space therebetween. Sub-bunkers 51A, 51B, 51C, 51D, 51E, 51, which are a plurality of discharging means extending below 23.
F is interposed.

Each of the coal feeders 24A to 24F is connected to the gas transport means 30 below each of the sub-bunkers 51A to 51F as described above. The granular material filled in each of the coal feeders 24A to 24F forms an airtight material seal by the granular material for preventing the backflow of gas from the gas transport means.

The supply equipment 2 includes a discriminator 52 serving as discriminating means, a setting device 53, and a control means 54. The discriminator 52, in response to the output of each of the ultrasonic detection means 40A to 40F, compares the stored amount of the granular material in each of the bunkers 19A to 19F with a predetermined upper limit stored amount set in the setting device 53, When the storage amount of at least one of the granules in each of the bunkers 19A to 19F is equal to or larger than the upper limit storage amount, a signal indicating that the storage amount is equal to or larger than the upper limit storage amount is output. Further, the discriminator 52 compares the storage amounts of the respective bunkers 19A to 19F with a predetermined lower limit storage amount that is less than the upper limit storage amount set in the setting device 53 in response to the output of the low-order selector 44. When the storage amount of at least one of the bunkers 19A to 19F is less than the lower limit storage amount, a signal indicating that the storage amount is less than the lower limit storage amount is output. Control means 54
Responds to the output of the discriminator 52, when the discriminator 52 determines that the storage amount of at least one of the bunkers 19A to 19F is greater than or equal to the upper limit storage amount, The operation of the scraper control means 49 is controlled so as to switch the destination. Further, when the discriminator 52 determines that the storage amount of the granular material in all the bunker 19 to be charged is equal to or more than the upper limit storage amount, the control means 54 stops the charging means 22. The operation of the three belt conveyors 25 to 27 and the scraper control means 49 is controlled. Furthermore, when the discriminator 52 determines that the storage amount of at least one of the granules of each of the bunkers 19A to 19F is less than the lower limit storage amount, the control unit 54 activates the charging unit 22. The operation of the first to third belt conveyors 25 to 27 and the scraper control means 49 is controlled.

FIG. 3 is a sectional view showing the arrangement of the ultrasonic level meter 47A, and FIG. 4 is an enlarged sectional view showing section IV of FIG. The ultrasonic level meter 47A is disposed at an angle θ1 = 10 °, for example, with respect to a central axis 56 extending in the vertical direction of the bunker 19A. The ultrasonic wave from the ultrasonic level meter 47A is
Within a virtual plane including the central axis 55, the angle, for example,
Fired over a range of θ2 = 5 °. In the sub-bunker 51A, the lower end 23 of the bunker 19A is
It is arranged coaxially with being inserted into the internal space of 1A.

The lid 59A is provided with an ultrasonic level meter 61A, which is a means for detecting the surface position of the granular material. The ultrasonic level meter 61A measures the distance x from the ultrasonic level meter 61A, which is exposed to the outside of the bunker 19A of the granular material stored in the sub-bunker 51A, to the surface 60, and measures the surface 6
The position L2 of 0 is detected. The ultrasonic level meter 61A is
The central axis 62 is provided at, for example, an angle θ3 = 25 ° with respect to the central axis 63 of the sub-bunker 51A coaxial with the central axis 56 of the bunker 19A. The ultrasonic wave from the ultrasonic level meter 61A is transmitted to the ultrasonic level meter 4 described above.
Similarly to 7A, the light is emitted to the central axis 62 in a virtual plane including the central axis 62, for example, over a range of angles θ2 = 5 °.

The output of the ultrasonic level meter 61A is input to the alarm generating means 64. The alarm generation means 64 indicates that the position L2 detected by the ultrasonic level meter 61A is
An alarm is issued when the value falls below a predetermined value set to 5. The surface of the granular material stored in the bunker 19A has an angle of repose θ4 = 40 °. Also, Sub-Banka 5
1A, the surface 60 has a repose angle θ5
= 40 °. The configuration shown in FIGS. 3 and 4 is the same for the remaining bunkers 19B to 19F.

FIG. 5 is a block diagram showing a simplified electrical configuration of the ultrasonic level meter 47A. The ultrasonic level meter 47A includes a transmission circuit 68, a vibrator 69, a time difference calculation circuit 70, and a reception circuit 71.
When a control signal for driving the ultrasonic level meter 47A is input to the transmission circuit 68, the transmission circuit 68
And a time difference calculation circuit 70 is activated. The vibrator 69
It is oscillated by the transmission pulse signal and emits ultrasonic waves to the surface to be measured, which is the surface 50 of the granular material. The vibrator 69 receives the ultrasonic wave reflected by the surface to be measured, and outputs a reception pulse signal to the reception circuit 71. The receiving circuit 71 outputs a signal indicating that the vibrator 69 has received the ultrasonic wave to the time difference calculating circuit 70 in response to the received pulse signal from the vibrator 69. The time difference calculation circuit 70 calculates a time difference corresponding to the distance L1 from the generation of the ultrasonic wave to the reception of the ultrasonic wave, and outputs a signal proportional to the time difference. Thus, the distance L1 between the vibrator 69 and the surface to be measured is detected. The same applies to the remaining ultrasonic level meters 47B to 47F and 61A.

FIG. 6 is a simplified front view showing the configuration of the charged amount meter 41. The charging amount meter 41 is provided at a fixed position below the conveyor belt 74 of the first belt conveyor 25, and detects weight acting on the conveyor belt 74, and detects the traveling speed of the conveyor belt 74. Traveling speed detector 7 as traveling speed detecting means
6 and arithmetic means 77. The weight detecting means 75 includes a pair of weighing rollers 78 and 79, a support member 80, a bending member 81, a connecting member 82, and a load cell 83.

The pair of weighing rollers 78 and 79 vertically move the space between the transport belt 86 of the conveyor belt 74 supported by the carrier roller 84 and the return belt 87 supported by the base roller 85. It is provided to be displaceable. The pair of weighing rollers 78 and 79 are arranged between the carrier rollers 84 and are spaced from each other in a state of being in contact with the transport belt 86. Support member 8
Numeral 0 extends between the respective measuring rollers 78 and 79, and rotatably supports the respective measuring rollers 78 and 79. The flexure member 81 is provided to extend substantially horizontally from the support 89 with the base end 90 fixed to a support 89 that extends upward with respect to the gantry 88. The connecting member 82 includes a central portion 91 of the support member 80 and the flexible member 8.
One free end portion 92 is extended, and both end portions thereof are pin-connected to the center portion 91 of the support member 80 and the free end portion 92 of the flexible member 81, respectively. The load cell 83 is arranged in contact with the flexure member 81 and the gantry 88, respectively, and outputs a signal representing a weight based on the flexure amount of the flexure member 81 to the calculation means 77.

The traveling speed detector 76 is rotatably provided on the downstream side in the transport direction A with respect to one of the measuring rollers 78 on the downstream side in the transport direction A, and is disposed in contact with the transport side belt 86 from below. It includes a speed detection roller 93 and a detector 94 that detects the traveling speed of the transport belt 86 from the number of rotations of the speed detection roller 93. The detector 94 includes a pulse generator that generates a pulse signal by the rotation of the speed detection roller 93, and a counter that counts the number of pulses of the pulse signal. The traveling speed detector 76 detects the number of pulses of the pulse signal from the pulse generator of the detector 94 driven by the rotation of the speed detecting roller 93.
The number of rotations of the speed detecting roller 93 is obtained by counting by the counter, and the traveling speed of the transport side belt 86 is detected from the number of revolutions, and a signal representing the traveling speed is output to the calculating means 77. The calculating means 77 responds to each output of the load cell 83 and the speed detecting roller 76 of the weight detecting means 75, and integrates the detected weight per unit time over a predetermined period to calculate the charged amount of the charged granular material. Then, a signal indicating the charging amount is output to the storage amount calculating means 43.

When the particles loaded on the transport belt 86 pass between the measuring rollers 78 and 79, the weight of the particles acting on the transport belt 86 causes each of the measuring rollers 7.
8, 79 and the support member 80 are displaced downward. This displacement is applied to the free end 9 of the flexible member 81 via the connecting member 82.
2 to displace the free end portion 92 of the flexible member 81 downward. The amount of deflection of the bending member 81 is determined by the load cell 8.
3 is converted into a weight per unit traveling distance by the load cell 83 and output to the calculating means 77. At the same time, the traveling speed of the transport belt 86 is detected by the traveling speed detector 76 and output to the calculating means 77. The calculating means 77 calculates the product of the weight per unit traveling distance and the traveling speed, obtains the detected weight per unit time, integrates the detected weight over a predetermined period, and calculates the charged amount of the granular material. Ask.

FIG. 7 is a longitudinal sectional view showing the structure of the distributor 29 in a simplified manner. The distributor 29 is formed in an inverted Y-shape and has a cylindrical body 98 having one inlet 95 and a plurality of (two in the present embodiment) outlets 96 and 97 on the opposite side of the inlet 95. And a switching plate 99. Switching plate 99
Is provided in a cylindrical body 98, and one end of the switching plate 99 is fixed to a swing shaft 10 that passes through the vicinity of the crotch portion 100 of the tubular body 98 perpendicularly to the paper surface of FIG. 7. Around each of the discharge ports 96 and 97, it is swingably provided. Switching plate 9
When 9 swings toward one of the discharge ports 96, the charging port 95 and the other discharge port 97 communicate with each other. When the switching plate 99 swings toward the other outlet 97, the charging port 95 communicates with the one outlet 96. By oscillating the switching plate 99 in this manner, the granular material charged in the charging port 95 can be guided to one of the one discharging port 96 and the other discharging port 97. In this manner, the powdery and granular materials conveyed to the second belt conveyor 26 of each supply system can be distributed to the third belt conveyor 27 of each supply system.

Referring to FIGS. 1 to 7, each bunker 19A-
The powder and granules provided on the upstream side in the charging direction of the powder and granules from 19F and discharged from the discharge facility 11 interlocked with the charging means 22 and passed through the vibrating sieve 16 are supplied to the first belt conveyor 25. . In the first belt conveyor 25, the charged amount meter 41 detects the charged amount charged into each of the bunkers 19A to 19F. The granular material supplied to the first belt conveyor 25 is supplied to the third belt conveyor 27 via the second belt conveyor 26 and the distributor 29. The granular material is conveyed by the third belt conveyor 27, and is charged and stored in any one of the bunkers 19A to 19F by the scrapers 28A to 28E whose operations are controlled by the scraper control means 49. You. The granular material stored in each of the bunkers 19A to 19F is subjected to an ultrasonic level meter 47A by each of the ultrasonic detecting means 40A to 40F.
The stored amount is detected based on a distance L1 between the powder particles 47 to 47F and the surface 50 of the granular material forming the angle of repose.

For example, the powder and granules stored in the bunker 19A are supplied from the lower end 23 of the bunker 19A to the sub-bunker 51A.
Guided and stored. The powder and granules stored in the sub-bunker 51A are discharged by the coal feeder 24A. In addition, the position L2 of the granular material stored in the sub-bunker 51A is always constant as long as the granular material is stored in the bunker 19A. The height L2 of the surface 60 is determined by the ultrasonic level meter 6.
1A. The ultrasonic level meter 61A is preferably used for detecting the position L2 of the surface 60,
In the case of a contact-type level meter such as a capacitance-type level meter, the weight of the granular material stored in the bunker 19A acts on the level meter to damage the level meter. This is because, in the case of a type level meter, laser light or the like is diffused by pulverized coal floating in the sub-bunker 51, and the position L2 cannot be detected accurately. Further, since the distance between the ultrasonic level meter 61A corresponding to the position L2 of the surface 60 and the surface 60 is short, the position L2 can be detected with high accuracy even when the ultrasonic level meter 61A having less sharp directivity is opened. be able to. When the bunker 19 becomes empty, the surface 60 of the granular material stored in the sub-bunker 51 is displaced downward from the lower end surface 23a, and
When the ultrasonic level meter 61A detects that the position L2 is less than or equal to a predetermined value, the alarm generating means 64 generates an alarm. The same applies to the remaining sub-bunkers 51B to 51F.

The amount of the granular material discharged by each of the coal feeders 24A to 24F is detected by each of the discharge amount measuring devices 42A to 42F. Signals representing the amount of each of the payout amount detectors 42 </ b> A to 42 </ b> F are output to the storage amount calculating unit 43. The powder and the granular material whose discharge amount is detected by each of the discharge amount measuring devices 42A to 42F is commonly guided to the transport path 34 through each of the discharge paths 33A to 33F. The granular material guided to the transport path 34 is transported in gas by compressed air supplied from a pressure source 35 and supplied to the crusher 31. The pulverized powder obtained by pulverization by the pulverizer 31 is supplied to the boiler 32.

Next, detection of the stored amount of the bunker 19A will be described. As described above, the storage amount of the granular material in the bunker 19A is detected by the ultrasonic detection unit 40A and is calculated by the storage amount calculation unit 43. The detection of the stored amount by the ultrasonic detection means 40A is as described above, and the description is omitted. The calculation of the storage amount by the storage amount calculating means 43 is performed by subtracting the amount of the granular material discharged from the coal feeder 24A at that time from the amount of the charged granular material charged into the bunker 19A. This is performed by adding the storage amount immediately before charging the granular material to the water. That is, charging means 2
2 is activated and the bunker 19A is charged with the granular material, the charge amount of the granular material to be charged into the bunker 19A detected by the charge amount meter 41 is used to determine the bunker 19A. Calculate the stored amount of powder and granules in the inside. When the charging means 22 is not activated and the granular material is not charged into the bunker 19A, the charged amount is set to zero and the storage amount of the granular material in the bunker 19A is calculated.

In this manner, the amount of powder and granules stored in the bunker 19A is detected by the ultrasonic detecting means 40A and calculated by the stored amount calculating means 43. Sound wave detecting means 40
A can accurately detect the stored amount,
This is because if the stored amount is small, it becomes difficult to accurately detect the stored amount by the ultrasonic detection means 40A.
That is, the inner peripheral surface of the bunker 19A is tapered downward, the cross-sectional area perpendicular to the central axis 56 decreases, and the measurement error of the surface 50 increases.
This measurement error is related to the reflected ultrasonic wave from the coal surface.
The reflected wave from the inner peripheral surface of the bunker becomes a noise component, and the noise component increases as it goes downward. Further, it is difficult for the ultrasonic level meter 47A to sharpen the directivity of the ultrasonic wave in order to reduce the noise component. In this way, when the amount of stored powder is small,
The stored amount is detected more than the actual stored amount due to the noise component. Further, when a bridge is generated in the bunker 19A by the granular material, the ultrasonic detection means 40A
Since the surface of the bridge is detected, the actual storage amount cannot be accurately detected.

However, in the present embodiment, the amount of powder and granules stored in the bunker 19A is determined not only by the ultrasonic detecting means 40A but also by the stored amount calculating means 43.
The stored amount can be accurately obtained regardless of the occurrence of the noise component and the bridge as described above.

Outputs from the ultrasonic detecting means 40 A and the stored amount calculating means 43 are input to a low-order selector 44. In the low-order selector 44, the smaller one of the storage amount by the ultrasonic detection means 40A and the storage amount by the storage amount calculating means 43 is selected. For example, even if the inside of the bunker 19A is emptied, it is possible to prevent the detection that the granular material is stored in the bunker 19A. The same applies to the remaining bunkers 19B to 19F.

Next, a description will be given of a case where the charging operation of the granular material is automated by using the above-mentioned storage amount detecting device 1. The signal indicating the storage amount selected by the low-level selector 44 is input to the discriminator 52. The discriminator 52 further receives a signal representing the amount stored by each of the ultrasonic detection means 40A to 40F. In a state where the dispensing facility 11 and the charging means 22 are stopped, the discriminator 52 responds to the output of the low-level selector 44 and at least one of the bunkers 19A to 19F.
For example, when it is determined that the storage amount of the granular material of the bunker 19A is less than the lower limit storage amount, a signal indicating that the storage amount is less than the lower limit storage amount is output to the discriminator 50 to the control means 54. The control means 54 starts the dispensing facility 11 and the first to third belt conveyors 25 to 27, and starts the scraper control means 49. The scraper control means 49 drives the scraper 28A corresponding to the bunker into which the powder is to be charged.

When the dispensing facility 11 and the charging means 22 are activated and the granular material is loaded in the bunker 19A, the discriminator 52 determines that the storage amount of the granular material in the bunker 19A exceeds the upper limit storage amount. If the discriminator 52 determines that the amount is larger than the upper limit storage amount, the discriminator 52 outputs a signal indicating that the stored amount is equal to or more than the upper limit storage amount. The control means 54 outputs to the scraper control means 49 a signal for switching the charging destination of the coal. With this signal,
The scraper control means 49 includes a bunker less than the upper limit storage amount,
For example, the operation of the scrapers 28A and 28B is controlled so that the granular material is charged into the bunker 19B. That is, the driving of the scraper 28A in the driven state is stopped, the scraper 28A is raised in the direction away from the third belt conveyor 27, and the scraper 28B is driven to lower in the direction approaching the third belt conveyor 27. At this time, the scraper 28 corresponding to the bunker having the upper limit storage amount once or more is not driven.

Further, when the discriminating means 52 outputs a signal indicating that the storage amount exceeds the upper limit storage amount to the control means 52, the discriminator 52 determines that the storage amount of the granular material in all the bunker to be charged is equal to the upper limit storage amount. When it is determined that the amount is equal to or more than the amount, the control means 54 stops the dispensing facility 11 and the first to third belt conveyors 25 to 27, and outputs a signal to the scraper control means 49 to stop the driving of the scrapers 28A to 28F. I do.

When it is determined by the discriminator 52 that the storage amount of the granular material has fallen below the lower limit storage amount in a plurality of bunkers,
The operation of each of the scrapers 28A to 28E is controlled by the control means 54 and the scraper control means 49 so that the granules are preferentially charged into the bunker having the smallest storage amount among the storage amounts. When the granular material is charged into the bunker for a certain period of time, the charging destination is switched, and the granular material is charged again into the bunker where the charging has been interrupted. In this way, automation of the charging operation of the granular material can be realized.

In this embodiment, each of the scrapers 28A
In the operation of 28E, the charging destination of the granular material is switched when the storage amount of the granular material in each of the bunkers 19A to 19F is equal to or more than the upper limit storage amount. Alternatively, each of the scrapers 28A to 28E may be driven to switch the charging destination.

As described above, each of the ultrasonic detecting means 40A-
The storage amount detected by 40F and the upper limit storage amount are compared by the discriminator 52, the storage amount selected by the lower selector 44 and the lower limit storage amount are compared by the discriminator 52, and the response to the output of the discriminator 52 is made. Then, the control means 54 controls the operation of the charging means 22, so that each of the bunkers 19A-19
The granules can be charged into each of the bunkers 19A to 19F such that the granules in F are stored between the upper limit storage amount and the lower limit storage amount. In addition, as described above, each of the bunkers 19A-1
Since the stored amount in 9F can be accurately detected,
The lower limit storage amount of the granular material can be reliably detected, and the granular material can be charged into each of the bunkers 19A to 19F regardless of day or night.

Sub-bunkers 51A to 51F are provided below each of the bunkers 19A to 19F.
Even if the inside of A to 19F becomes empty, each sub-bunker 51
Granules are stored in A to 51F, and each bunker 19
It is possible to secure the time required for charging the granular material into A to 19F.

For example, the position L2 of the surface 60 of the granular material stored in the sub-bunker 51A is detected by the ultrasonic level meter 61A, and the position L2 of the surface 60 is detected.
Is smaller than a predetermined value, an alarm is generated by the alarm generating means 64, so that the ultrasonic detecting means 40A and the storage amount calculating means 43 fail to detect the stored amount of the granular material in the bunker 19A. Even if it disappears, by detecting that the position L2 of the surface 60 of the granular material stored in the sub-bunker 51A is less than a predetermined value,
It can be seen that the inside of the bunker 19A is empty, and an alarm can be issued to alert the worker. The same applies to the remaining bunkers 19B to 19F.

Further, since the charged amount meter 41 is composed of the weight detecting means 75, the traveling speed detector 76 and the calculating means 77, the powder is continuously transferred while the powder and the granular material are transported by the first belt conveyor 25. The charged amount of the granular material can be detected, and the charged amount can be detected in a shorter time than when the granular material is temporarily stored in a bucket or the like and the charged amount is detected. Further, the conveyor belt 74 is detected by the weight detecting means 75.
The weight acting on the conveyor belt 74 is detected by the traveling speed detector 76 and the traveling speed of the conveyor belt 74 is detected.
Even if the traveling speed of the vehicle fluctuates, the fluctuating weight and speed can be reliably detected, and thus the detected weight per unit time can be accurately obtained, and the amount of the charged powder and granular material can be accurately obtained. it can. Furthermore, the charging amount meter 41 is the first
Since it is provided on the belt conveyor 25, it is possible to detect the charged amount of the granular material to be charged into each of the bunkers 19A to 19F with one charged amount measuring device 41, and to simplify the configuration. it can.

The charging means 22 separates the powdery and granular materials from the respective bunkers 19A to 19F by first to third belt conveyors 25 to 27.
And the plurality of scrapers 28 are selectively loaded into each of the bunkers 19A to 19F, so that the granular material can be reliably loaded only into the bunker to be loaded with a simple configuration. As a result, for maintenance and inspection of the bunker, it is possible to provide a rest bunker in which no powder is charged.
Further, charging of the granular material into the bunker having reached the upper limit storage amount can be prevented, and the granular material can be prevented from overflowing from the bunker. Further, for example, when the granular material is loaded into the bunker 19A, even if the storage amount of the granular material of the other bunker 19B becomes smaller than the lower limit storage amount, the charging destination of the granular material can be easily determined. Can be changed to other bunker 19B
Can be charged preferentially. This prevents the other bunker 19B from being emptied during the charging operation of the granular material.

Each second belt conveyor 26 for each supply system
In addition, a distributor 29 is provided between the third belt conveyors 27, so that one of the bunker groups 20 in each supply system is provided.
However, even when, for example, the loading of the granular material is prohibited due to maintenance and inspection, the corresponding third belt conveyor 27 is loaded into the other bunker group 20 by each distributor 29. The powder can be dispensed.

Further referring to FIG. 1, powder and granular material supply equipment 2 includes a time setting device 105 as time setting means, a clock 106 as clock means, a first operation means 107, and a second operation means. 108 and an activation control means 109. The time setting device 105 is a dispensing facility 1 that is a component provided upstream of each of the bunkers 19A to 19F in the charging direction of the granular material.
Predetermined maintenance inspection start time Tt for the first maintenance inspection
Is set, and a signal indicating the maintenance inspection start time Tt is output to the second calculating means 108. The clock 106 clocks the time and outputs a signal indicating the current time Tn to the activation control means 109. The first calculating means 107 responds to the output of the low-order selector 44, based on the upper limit storage amount of each of the bunkers 19A to 19F and the storage amount of the granular material at the current time Tn of each of the bunkers 19A to 19F. The charging time Tc required for charging the granules to the upper limit storage amount in the bunkers 19A to 19F is calculated, and a signal representing the charging time Tc is output to the second calculating means 108. The second calculating means 108 responds to each output of the time setting device 105 and the first calculating means 107, and
2 and outputs a signal representing the start time Ts to the start control means 109. Activation control means 109
Responds to the outputs of the clock 106 and the second arithmetic means 108, and the current time Tn clocked by the clock 106 is
When the start time Ts calculated by the calculation means 108 has passed, a signal for starting the charging means 22 is output to the control means 54.

FIG. 8 is a timing chart for activating the loading means 22 at the activation time Ts. FIG. 9 is a flowchart showing an operation procedure for activating the loading means 22 at the activation time Ts. Step a1 to Step a
In step a2, a predetermined maintenance inspection start time Tt for maintenance and inspection of the dispensing facility 11, for example, 13:30, as shown in FIG. 8, is set in the time setting device 105. When the maintenance start time Tt is set,
The process proceeds from step a2 to step a3. In step a3, the activation control means 107 reads the current time Tn from the clock 106, for example, 5:00 as shown in FIG. When the current time Tn is read, the process proceeds from step a3 to step a4.
7, the charging time Tc is calculated. Charging time T
c is obtained by the following equation.

[0084]

(Equation 1)

Here, A1 is the conveying capacity (unit: t / h) of the third belt conveyor 27, and A2 is each of the coal feeders 24A to 24A.
The maximum payout capacity (unit t / h) of 24F, and C1 is
The number of bunkers provided in the bunker group 20, C2 is the number of paused bunkers, D1 is the upper limit storage amount (unit t) of each of the bunkers 19A to 19F, and D2 is each of the bunkers 19A to
The storage amount (unit t) of the granular material in 19F. Bn
Is zero when the bunker is a dormant bunker, and is 1 when the bunker is not a dormant bunker. Equation (1)
Represents the net charge per unit time, and the numerator of the equation (1) represents the charge of the granular material to be charged into the remaining bunker of the bunker group 20 excluding the rest bunker. Represents the sum. In this way, the charging time Tc of the granular material, for example, 2 hours and 30 minutes as shown in FIG. 8 is obtained.

When the charging time Tc is calculated, step a
Then, the process proceeds from Step 4 to Step a5. In Step a5, the start time Ts is calculated by the second calculating means 108. The startup time Ts is obtained by subtracting the charging time Tc from the maintenance inspection start time Tt. In FIG. 8, a current time Tn, for example, a start time Ts at 5:00 is, for example, 11:00. When the start time Ts is calculated, the process proceeds from step a5 to step a6. In step a6, the start control unit 108 determines whether the current time Tn has passed the start time Ts. If it is determined that the current time Tn has not passed the start time Ts, the process returns to step a3, and the operations in steps a3 to a6 are repeated. In FIG. 8, the current time Tn is 5 o'clock and the start time Ts is 11 o'clock, so it is not started. As time elapses, the stored amount of the granular material in each of the bunkers 19A to 19F decreases, and the charging time Tc increases accordingly. Therefore, when the current time Tn moves to the right in FIG. 8 after a lapse of time, the activation time Ts moves to the left in FIG.

The current time Tn is the start time Ts, for example, as shown in FIG.
In step a6, if it is determined that 9:00 has passed,
From step a7, and in step a7, a signal for simultaneously activating the belt conveyor 14 for each supply system and the first to third belt conveyors 25 to 27 for each supply system of the dispensing facility 11 by the activation control means 109. Is output to the control means 54, and the fact that it is activated is notified by voice. Thereafter, the process proceeds from step a7 to step a8, and a series of operations is completed. In this way, the belt conveyor 14 for each supply system of the dispensing facility 11 and the first to third belt conveyors 25 to 27 for each supply system are simultaneously activated. When the current time Tn passes the maintenance check start time Tt, the driving of the belt conveyor 14 for each supply system of the dispensing facility 11 and the driving of the first to third belt conveyors 25 to 27 for each supply system are stopped. At this time, the belt conveyor 14 and the first to third belt conveyors 25 to 27 for each supply system are simultaneously stopped.

As described above, the storage amount of the granular material in each of the bunkers 19A to 19F is accurately detected, and the start time Ts is obtained based on the current time Tn, the maintenance inspection start time Tt, and the charging time Tc. Since the charging means 22 is activated, it is possible to secure the required storage amount of the granular material in each of the bunkers 19A to 19F during the maintenance and inspection period of the dispensing facility 11 by the maintenance and inspection start time Tt. Therefore, by setting the maintenance inspection start time Tt to a predetermined time, for example, 13:30, the dispensing facility 11 can be set at a regular time every day, for example, 13:30.
The required amount of powder during the maintenance inspection period of each bunker 19A
~ 19F.

At the time of maintenance and inspection of the dispensing facility 11,
Since each charging means 22 is stopped simultaneously, each charging means 2
2, the belt conveyors 14 for each supply system of the dispensing facility 11 can be stopped at the same time, and the maintenance of the dispensing facility 11 can be performed safely.

FIG. 10 shows a powdery and granular material supply equipment 2 provided with a granular and granular material storage amount detection apparatus 1A according to another embodiment of the present invention.
FIG. 11 is a simplified system diagram showing A, and FIG. 11 is a cross-sectional view showing an arrangement state of an ultrasonic level meter 47A and a capacitance level meter 115A. In the present embodiment, portions corresponding to the configuration of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The powdery and granular material supply equipment 2A including the storage amount detection device 1A is similar to the configuration of the embodiment shown in FIGS. 1 to 9, and it should be noted that each of the bunkers 19A to 19A is notable.
On the upper part 21 of F, capacitance level meters 115A, 115B, 115C, 115D, 11 serving as capacitance detecting means are provided.
5E and 115F are provided. Less than,
The bunker 19A will be described. Capacitance level meter 1
15A includes an electrode 116A extending downward in the direction of the axis 56 of the bunker 19A and an electric circuit such as a high-frequency bridge circuit (not shown). The capacitance type level meter 119A is
The capacitance between the electrode and the peripheral wall 117A of the bunker 19A is detected, thereby detecting the upper limit storage amount of the bunker 19A. More specifically, the surface 50 of the granular material in the bunker 19A is the electrode 116A and the peripheral wall 1 of the bunker 19A.
17A, the capacitance between the electrode 116A and the peripheral wall 117A of the bunker 19A changes, and the change is detected by an electric circuit.
5A outputs to the control means 54 a signal indicating that the storage amount of the granular material is equal to or more than the upper limit storage amount. When this signal is input to the control means 54, the control means 54 stops the driving of the payout facility 11 and the charging means 22. The ultrasonic detecting means 40A is used only for detecting the lower limit storage amount of the granular material.

The discriminator 52A receives a signal representing the storage amount selected by the low-order selector 44 and a signal representing the lower limit storage amount set in the setting device 53A. The smaller of the stored amount of the granular material detected by the ultrasonic detecting means 40A and the stored amount calculated by the stored amount calculating means 43 is selected by the low-order setting device 44, and the stored amount is set to the lower limit by the discriminator 52A. It is determined whether it is less than the storage amount. When it is determined that the storage amount is less than the lower limit storage amount, the control unit 54 starts the dispensing facility 11 and the charging unit 22. Remaining bunka 19B-19F
The same applies to. Further, the configuration and the operation of activating the discharge facility 11 and the charging means 22 at the activating time Ts are the same as those in the embodiment of the present invention shown in FIGS.

For example, the capacitance type level meter 115A is
Since it is detected based on the capacitance of the electrode 116A and the peripheral wall 117A of the bunker 19A that the stored amount of the powder exceeds the upper limit stored amount, the upper limit stored amount can be detected with a simple configuration and with high accuracy. Thus, the upper limit storage amount can be easily changed, and the effective storage amount of the bunker 19A can be easily increased. The same applies to the remaining capacitance-type level meters 115B to 115F.

The traveling speed of the conveyor belt 74 may be a predetermined constant speed as described above, or may vary.

In the embodiment of the present invention shown in FIGS. 1 to 11, on the first to third belt conveyors 25 to 27 after the powdery material has been charged into each of the bunkers 19A to 19F,
After the charged amount is detected by the charged amount meter 41, the powder and granular material not charged in each of the bunkers 19A to 19F remains. The granules may be equally charged into each of the bunkers 19A to 19F. As a result, the first and third belt conveyors 2
It is possible to prevent the conveyor belt from being damaged by remaining for a long time at 5 to 27 or the like. Each bunker 19A-19F
The charging of the granules into the bunker may be performed in any order, and an arbitrary bunker is set. Further, after the bunker 19F, the charging destination may be switched to the bunker 19A. Further, a plurality of bunkers are provided, but the number is not limited to this, and only one may be provided.

In the embodiment of the present invention shown in FIGS. 1 to 11, for example, the bunker 19A is provided with one ultrasonic level meter 47A and one capacitance level meter 115A, and the sub-bunker 51A is provided with an ultrasonic level meter 115A. Sound level meter 61
Although one A is provided, the present invention is not limited to this, and a plurality of A may be provided. As a result, even if the amount of the granular material is reduced, the storage amount and the position L2 are detected at a plurality of locations, and the smallest storage amount and the position L2 are selected.
2 can be detected. In addition, the granules are granulated coal and granulated charcoal, but may be pellets composed of iron ore and auxiliary materials such as limestone, or other granules.

[0096]

According to the first aspect of the present invention, the storage amount of the granular material in the bunker is obtained by the ultrasonic detecting means and the storage amount calculating means. Even if the amount decreases and the stored amount cannot be accurately detected by the ultrasonic detecting means, the stored amount calculated by the stored amount calculating means can be used to accurately determine the stored amount of the granular material in the bunker. It can be detected well. At the same time, the low-order selector selects the smaller of the storage amount by the ultrasonic detection means and the storage amount by the storage amount calculation means, so that the storage amount of the granular material in the bunker must always be detected on the safe side. Can be.

Further, according to the present invention, since the discharging means is provided below the bunker, even if the inside of the bunker becomes empty, the discharging means stores the powder and granules, and the bunker holds the powder and granules. The time required for inserting the body can be secured. Further, the position of the surface of the granular material stored in the discharging means is detected by the granular material surface position detecting means, and an alarm is generated when the position of the surface exposed outside the lower end of the bunker becomes equal to or less than a predetermined value. An alarm will be generated by the means,
Even when the ultrasonic detecting means and the storage amount calculating means are out of order, it is possible to know that the inside of the bunker is empty, to issue an alarm, and to alert the worker.

According to the second aspect of the present invention, the dispensing means forms a material seal with the gas transport means in a state where the inside thereof is filled with the granular material, and transfers the gas from the gas transport means to the bunker. Since the blow-up is prevented and the gas transport of the granular material to the boiler itself is enabled, it is possible to detect that the bunker body is empty when the granular material remains in the discharge means. The alarm can give the operator time to perform an operation for reinserting the granular material into the bunker while continuing the operation of the boiler, and does not affect the stable operation of the boiler.

According to the third aspect of the present invention, the weight acting on the conveyor belt of the belt conveyor is detected by the weight detecting means, the traveling speed of the conveyor belt is detected by the traveling speed detecting means, and the particle size is calculated by the calculating means. Since the charged amount of the body is calculated, the charged amount of the granular material can be detected continuously and in a short time while the granular material is conveyed by the belt conveyor. Also, since the weight acting on the conveyor belt is detected by the weight detecting means, and the traveling speed of the conveyor belt is detected by the traveling speed detecting means, even if the weight acting on the conveyor belt and the traveling speed of the conveyor belt fluctuate, it fluctuated. The weight and the speed can be reliably detected, and the charged amount of the granular material can be accurately obtained. Further, even if a plurality of bunker is provided, by providing the charged amount detecting means upstream of the most upstream bunker in the charging direction of the granular material in the charging direction, one charged amount detecting means is provided. Thus, the amount of the granular material to be charged into each bunker can be detected, and the configuration can be simplified.

According to the fourth aspect of the present invention, the storage amount of each ultrasonic detecting means and the upper limit storage amount are compared by the discriminating means, and the storage amount selected by the low-order selector and the lower limit storage amount are discriminated. Since the control means controls the operation of the charging means in response to the output of the discriminating means, the granular material in each bunker is stored between the upper limit storage amount and the lower limit storage amount. The powder can be charged into a bunker. In addition, since the storage amount in the bunker can be accurately detected, the lower limit storage amount of the granular material can be reliably detected, and the granular material can be loaded into each bunker day or night. Furthermore, since the ultrasonic detection means is used for detecting the upper limit storage amount and the lower limit storage amount, there is no need to separately provide a means for detecting the upper limit storage amount and a means for detecting the lower limit storage amount, The configuration can be simplified.

According to the fifth aspect of the present invention, the capacitance detecting means determines that the storage amount of the granular material is equal to or more than the upper limit storage amount based on the capacitance between the electrode and the peripheral wall of the bunker. Since the detection is performed, the upper limit storage amount can be detected with high accuracy with a simple configuration, whereby the set value of the upper limit storage amount can be increased, and the effective storage amount of the bunker can be increased.

According to the present invention, the storage amount of the granular material in the bunker is accurately detected, and the charging means is activated based on the current time, the maintenance start time, and the charging time. Therefore, it is possible to secure the necessary storage amount of the granular material in the bunker during the maintenance and inspection period of the components by the maintenance and inspection start time.

According to the seventh aspect of the present invention, the charging means conveys the powder and granules to each bunker in common by the conveying means,
Since each bunker is selectively charged by a plurality of scraping plates, it is possible to reliably charge the granular material only to the bunker to be charged with a simple configuration. As a result, for maintenance and inspection of the bunker, it is possible to provide a rest bunker in which no powder is charged. Further, charging of the granular material into the bunker having reached the upper limit storage amount can be prevented, and the granular material can be prevented from overflowing from the bunker. Furthermore, even if the storage amount of the granular material in another bunker becomes smaller than the lower limit storage amount when the granular material is loaded in the bunker, the charging destination of the granular material should be easily changed. And the granules can be preferentially charged into other bunker. This can prevent another bunker from being emptied during the charging operation of the granular material.

According to the present invention, since the distribution means for mutually distributing the powder and granules is provided between the charging means, an arbitrary group of bunker can be used for the maintenance and inspection. Even when the charging of the granules is prohibited, the powder and the granules can be distributed to the corresponding charging means so that the remaining bunker group is charged by the distribution means.

According to the ninth aspect of the present invention, since the charging means are simultaneously stopped at the time of maintenance and inspection of the components, the components interlocked with the respective charging means can be stopped at the same time. The maintenance of the components can be performed.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a simplified supply system 2 of a granular material including a granular material storage amount detection device 1 according to an embodiment of the present invention.

FIG. 2 is a system diagram showing a simplified configuration of a coal storage facility 3 including a powdery granule supply facility 2.

FIG. 3 is a sectional view showing an arrangement of an ultrasonic level meter 47A.

FIG. 4 is an enlarged sectional view showing section IV of FIG. 3;

FIG. 5 is a simplified block diagram showing an electrical configuration of an ultrasonic level meter 47A.

FIG. 6 is a simplified front view showing a configuration of a charged amount meter 41.

FIG. 7 is a longitudinal sectional view showing a simplified configuration of a distributor 29.

FIG. 8 is a timing chart for starting the loading means 22 at the start time Ts.

FIG. 9 is a flowchart showing an operation procedure for starting the loading means 22 at the start time Ts.

FIG. 10 is a simplified system diagram of a powder and granular material supply facility 2A including a powder and granular material storage amount detection device 1A according to another embodiment of the present invention.

FIG. 11 is a sectional view showing an arrangement state of an ultrasonic level meter 47A and a capacitance level meter 115A.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Storage amount detection apparatus 2, 2A Supply equipment 3 Coal storage and transportation equipment 11 Dispensing equipment 19A to 19F Bunker 20 Bunker group 22 Charging means 24A to 24F Coal supply machine 25 First belt conveyor 26 Second belt conveyor 27 Third Belt conveyors 28A to 28F Scrapers 29 Distributors 30 Gas transport means 40A to 40F Ultrasonic detection means 41 Charge meter 42 Discharge amount meter 43 Storage amount calculation means 44 Lower selector 47A to 47F, 61A Ultrasonic level meter 48A to 48F Converter 49 Scraper control means 51A to 51F Sub-bunker 52, 52A Discriminator 53, 53A, 65 Setting device 54 Control means 64 Alarm generation means 74 Conveyor belt 75 Weight detection means 76 Traveling speed detector 77 Calculation means 105 Time setting Device 106 clock 107 first calculating means 10 Second arithmetic means 109 start controlling means 115A~115F capacitive level meter 116A electrodes 117A wall

(56) References JP-A-56-70234 (JP, A) JP-A-61-124434 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65G 65 / 00-65/48 G01F 23/28 G01G 9 / 00,17 / 04,19 / 38

Claims (9)

(57) [Claims] 1. A powder and granule comprising a charging means for charging a granular material from above in a hollow inverted pyramidal bunker extending in a vertical direction, and a discharging means for discharging and discharging the granular material from a lower part of the bunker. A device that is provided in the body supply facility and detects the amount of stored powder and granules in the bunker. It is located above the bunker and emits ultrasonic waves to the powder and granules stored in the bunker. Ultrasonic detection means for detecting the amount of powder particles stored in the bunker based on the time difference corresponding to the distance from the generation of the ultrasonic wave to the reception of the reflected wave, and the powder particles from the charging means to the bunker A charging amount detecting means for detecting a charging amount of the body, a discharging amount detecting means for detecting a discharging amount of the granular material discharged from the bunker by the discharging means, a charging amount detecting means and a discharging amount detecting means. Calculates the amount of powder and granular material stored in the bunker in response to the output A storage amount calculating means, a smaller one of a storage amount detected by the ultrasonic detection means and a storage amount calculated by the storage amount calculating means in response to each output of the ultrasonic detection means and the storage amount calculation means. A low-level selector that outputs a signal indicating the storage amount of the bunker, which is interposed between the lower end of the bunker and the dispensing means, surrounds the lower end of the bunker at an interval outward, and is lower than the lower end of the bunker. Discharge means extending to the discharge means, powder and granule surface position detection means for detecting the position of the surface of the powder and granules stored in the discharge means exposed to the outside of the lower end of the bunker, and the position is below a predetermined value And a warning generating means for generating a warning. 2. The dispensing means is connected to a gas transporting means for gas-transporting the granular material below the discharging means, and a powder is filled between the gas transporting means and the discharging means in a state where the granular material is filled therein. 2. The storage amount detecting device according to claim 1, wherein an airtight material seal is formed by the granules. 3. A powder particle comprising charging means for charging a granular material from above into a hollow inverted pyramidal bunker extending in a vertical direction, and discharging means for discharging and discharging the granular material from a lower portion of the bunker. A device that is provided in the body supply facility and detects the amount of stored powder and granules in the bunker. It is located above the bunker and emits ultrasonic waves to the powder and granules stored in the bunker. Ultrasonic detection means for detecting the amount of powder particles stored in the bunker based on the time difference corresponding to the distance from the generation of the ultrasonic wave to the reception of the reflected wave, and the powder particles from the charging means to the bunker A charging amount detecting means for detecting a charging amount of the body, a discharging amount detecting means for detecting a discharging amount of the granular material discharged from the bunker by the discharging means, a charging amount detecting means and a discharging amount detecting means. Calculates the amount of powder and granular material stored in the bunker in response to the output A storage amount calculating means, a smaller one of a storage amount detected by the ultrasonic detection means and a storage amount calculated by the storage amount calculating means in response to each output of the ultrasonic detection means and the storage amount calculation means. A low-level selector that outputs a signal indicating the storage amount of the charging device, the charging unit includes a conveying unit that conveys the granular material to the bunker, the conveying unit is a belt conveyor, and the charging amount detecting unit includes: A weight detecting means provided at a fixed position below the conveyor belt of the belt conveyor and detecting a weight acting on the conveyor belt; a traveling speed detecting means for detecting a traveling speed of the conveyor belt; a weight detecting means and a traveling speed detection Calculating means for responding to each output of the means, and calculating a charged amount of the granular material to be charged by integrating the detected weight per unit time over a predetermined period. That granular material of the storage amount detection device. 4. A charging means for charging a plurality of hollow inverted-cone-shaped bunkers with a granular material from an upper part thereof, and a plurality of discharging means for discharging and discharging a granular material from a lower part of each bunker, In the powder and granular material supply equipment which is provided upstream of each bunker in the charging direction of the granular material and supplies the granular material discharged from a component interlocking with the charging means to each bunker, The ultrasonic waves are emitted to the granular material stored in each bunker, the reflected wave from the granular material is received, and based on the time difference corresponding to the distance from generation to reception of the ultrasonic wave, each bunker is A plurality of ultrasonic detecting means for detecting a storage amount of the granular material in the inside; a charging amount detecting means for detecting a charging amount of the granular material from the charging means to each bunker; A plurality of payout amount detecting means for detecting each payout amount of the granular material to be paid out from the bunker; A storage amount calculating unit that calculates a storage amount of the granular material stored in each bunker in response to each output of the input amount detection unit and each output amount detection unit, and an ultrasonic detection unit and a storage amount calculation unit. A low-level selector that outputs a signal representing the smaller of the storage amount detected by the ultrasonic detection unit and the storage amount calculated by the storage amount calculation unit in response to the output; In response to the output of the detecting means, the storage amount of each bunker is compared with a predetermined upper limit storage amount, and when the storage amount of at least one of the granules in each bunker is equal to or more than the upper limit storage amount, the upper limit is set. A signal indicating that the storage amount is equal to or more than the storage amount is output, and in response to the output of the low-order selector, the storage amount of each bunker is compared with a predetermined lower limit storage amount that is less than the upper limit storage amount. Storage of at least one of the granules Is less than the lower limit storage amount, a discriminating means for outputting a signal indicating that the amount is less than the lower limit storage amount, and in response to the output of the discriminating means, the storage amount of at least one of the granular materials in each bunker is When the storage amount of the granular material is equal to or more than the upper limit storage amount, the charging destination is switched, and when the storage amount of the granular material in all the bunkers to be charged is equal to or more than the upper limit storage amount, the charging means is stopped, and Control means for controlling the operation of the charging means so as to activate the charging means when the storage amount of at least one of the powder and granular materials is less than the lower limit storage amount. Facility. 5. An electrostatic capacitance detecting means is provided on an upper portion of each bunker, and the electrostatic capacitance detecting means is configured to detect a powder based on an electrostatic capacitance between an electrode extending downward in the axial direction of the bunker and a peripheral wall of the bunker. 5. The powder and granular material supply equipment according to claim 4, wherein when the storage amount of the granules is equal to or more than the upper limit storage amount, a signal indicating that the storage amount is equal to or more than the upper limit storage amount is output. 6. A time setting means for setting a predetermined maintenance inspection start time for maintenance and inspection of a component provided upstream of each bunker in a charging direction of the granular material, and a clock means for clocking the time. And responding to the output of the low-order selector, based on the upper limit storage amount of each bunker and the storage amount of the granular material at the current time of each bunker, charging the granular material to each bunker up to the upper limit storage amount First calculating means for calculating the time required for the operation, second calculating means for calculating the start time of the charging means in response to each output of the time setting means and the first calculating means, clock means and second calculating means And activation control means for outputting a signal for activating the charging means when the time clocked by the clock means exceeds the activation time computed by the second computing means in response to each output of 6. The method according to claim 4, wherein Granular material supply equipment according. 7. The charging means includes a conveying means for conveying the powders and granules discharged from the components in common to each bunker, and selectively charging the powders and granules conveyed by the conveying means into each bunker. A plurality of scraping plates are included.
7. A supply facility for powdery granules according to any one of 6. 8. A supply system for powdery and granular materials is provided with a plurality of bunker groups each including a plurality of bunkers, and charging means is provided for each of the bunker groups. 8. A powder and granular material supply facility according to claim 4, wherein distribution means for mutually distributing the powder and granular material between the means are provided. 9. The powder and granular material supply facility according to claim 8, wherein each charging means is stopped at the same time during maintenance and inspection of the components.