JP5502123B2 - Coal remaining amount management system - Google Patents

Description

  The present invention relates to a remaining coal management system. In particular, the present invention relates to a remaining coal management system for managing the time until the remaining amount of coal reaches a predetermined value in a bunker that supplies coal to a boiler device of a coal-fired power plant.

The coal-fired power plant has a boiler device, a steam turbine, a generator, a coal bunker, a conveyor, and a coal silo. The boiler device heats water to generate water vapor (hereinafter simply referred to as steam). The steam turbine rotates the generator with steam supplied from the boiler device to generate power.
Coal is transported to the coal bunker from the coal silo via a conveyor, and the coal is temporarily stored in the coal bunker.

  Moreover, the boiler apparatus has a high-performance pulverized coal machine. Coal stored in the coal bunker is sent to a high-performance pulverized coal machine, which stably pulverizes a predetermined amount (quantitative amount) of coal (coal lump) into pulverized coal. . And a high performance pulverized coal machine sends pulverized coal to a boiler apparatus as fuel by pneumatic feeding.

JP 2001-263647 A

  When trouble occurs in a coal delivery system such as a conveyor that conveys coal, and a predetermined amount of coal cannot be conveyed to the coal bunker, the amount of coal stored in the coal bunker decreases. When the coal stored in the coal bunker is exhausted, the boiler device is stopped. In this way, when trouble occurs in the coal transmission system, if it is possible to know how long the boiler device can be continuously driven thereafter, it can be compared with the time required for repair to solve the trouble. In some cases, it is possible to complete the repair without stopping the boiler device.

  Therefore, the present invention is able to calculate how long the boiler device can be driven based on the amount of coal stored in the coal bunker when trouble occurs in the coal transmission system. The purpose is to provide a management system.

  The present invention includes a boiler device, a plurality of coal bunkers for storing coal and supplying the coal to the boiler device, a conveyor for conveying coal from a coal silo to the plurality of coal bunkers, and the plurality A coal storage amount detection unit capable of detecting the amount of coal stored in the coal bunker, and electrically connected to the boiler device and the stored coal amount detection unit, and the coal from the conveyor to the coal bunker Based on the amount of coal stored in the coal bunker when the supply of coal from the conveyor to the coal bunker is stopped when the coal stored in the coal bunker is continuously burned by the boiler device after the supply is stopped. A control unit that calculates time until the amount of coal stored in the coal bunker reaches a predetermined amount, and notifies the time calculated by the control unit And a notification unit of the order, to the coal remaining amount management system characterized by having a.

  Moreover, the present invention is electrically connected to the control unit, and when the coal stored in the coal bunker is continuously burned by the boiler device after the supply of coal from the conveyor to the coal bunker is stopped. And an input unit capable of inputting a desired required time until the amount of coal stored in the coal bunker at the time of stopping the supply of coal from the conveyor to the coal bunker reaches a predetermined amount, and the control unit includes: Controlling the combustion of coal in the boiler device so that the amount of coal stored in the coal bunker becomes the predetermined amount when the desired required time input from the input unit has elapsed. preferable.

  Here, the predetermined amount has a first predetermined amount, and the first predetermined amount is stored in the coal bunker by the boiler device after the supply of coal from the conveyor to the coal bunker is stopped. When the coal continues to be burned, there is no coal in the coal bunker, coal cannot be supplied from the coal bunker to the boiler device, and the boiler device must be stopped. It is preferable to notify when the amount of coal stored in the coal bunker reaches the first predetermined amount.

  Further, the predetermined amount has a second predetermined amount, and the second predetermined amount is coal stored in the coal bunker by the boiler device after the supply of coal from the conveyor to the coal bunker is stopped. Is the amount that the amount of coal stored in the coal bunker becomes the first predetermined amount in a predetermined time, and the notification unit indicates that the amount of coal stored in the coal bunker is the second place. It is preferable to notify when a fixed amount is reached.

  According to the present invention, when trouble occurs in the coal transmission system, the remaining amount of coal capable of calculating how long the boiler device can be driven based on the amount of coal stored in the coal bunker. A management system can be provided.

It is a schematic diagram mainly showing a coal bunker, a boiler device, a conveyor, a generator and the like of a coal-fired power plant having a coal remaining amount management system according to an embodiment of the present invention. It is a mimetic diagram showing the remaining coal management system by one embodiment of the present invention. It is a flowchart which shows control of the control part of the coal residual amount management system by one Embodiment of this invention.

  Hereinafter, a coal storage facility of a thermal power plant according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram mainly showing a coal bunker, a boiler device, a conveyor, a generator, and the like of a coal-fired power plant having a coal remaining amount management system according to an embodiment of the present invention. In order to facilitate understanding of the invention, the other parts of the thermal power plant are not shown. FIG. 2 is a schematic diagram illustrating a remaining coal management system according to an embodiment of the present invention. FIG. 3 is a flowchart showing the control of the control unit of the remaining coal management system according to the embodiment of the present invention.

  As shown in FIG. 1, the coal-fired power plant 1 includes a coal bunker 11, a boiler device 20, a conveyor (a silo conveyor 31, a bunker conveyor 32), a continuous coal unloader (unloader) 33, a coal silo 34, and power generation. Machine 41 (411, 412), high-pressure turbine 42, intermediate-pressure turbine 43, and low-pressure turbine 44. The boiler device 20 includes a boiler 21 and a high-performance pulverized coal machine 22.

  Coal carried to the thermal power plant by the coal ship 35 is landed on the silo line conveyor 31 from the coal ship by the continuous type coal lift 33. The silo line conveyor 31 is disposed so as to span the continuous coal raising machine 33 and the coal silo 34. Coal landed on the silo line conveyor 31 from the coal ship by the continuous coal lift 33 is conveyed to the coal silo 34 by the silo line conveyor 31. Coal carried to the coal silo 34 is temporarily stored until it is actually used.

The bunker row conveyor 32 is arranged so as to span the coal silo 34 and the coal bunker 11. The bunker row conveyor 32 is provided with a coal conveyance amount detection unit 321 for detecting the amount of coal conveyed by the bunker row conveyor 32.
Coal stored in the coal silo 34 is conveyed to the coal bunker 11 by the bunker row conveyor 32. The six coal bunker 11 is provided and has the substantially funnel shape which each upper end opens. At the upper end opening of the coal bunker 11 having a substantially funnel shape, one end portion of the bunker row conveyor 32 is arranged to face each other. The coal conveyed to the bunker row conveyor 32 falls from one end of the bunker row conveyor 32 to the opening of the coal bunker 11. In this manner, the coal transported by the bunker row conveyor 32 is supplied to each of the six coal bunker 11.

  The high-performance pulverized coal machine 22 is connected to each of the six coal bunker 11, and the coal conveyed to the coal bunker 11 is made into powder (pulverized coal) and charged into the boiler 21. The boiler 21 burns pulverized coal and changes the feed water 421 into steam 422 having high temperature (for example, about 600 degrees) thermal energy.

The high pressure turbine 42 and the intermediate pressure turbine 43 are rotated by this steam. The generator 411 is connected to the high-pressure turbine 42 and the intermediate-pressure turbine 43, and the generator 412 is connected to the low-pressure turbine 44. When the high-pressure turbine 42 is rotated by steam, the generator 411 is driven to generate electric energy.
Thereafter, the steam is reheated, and the intermediate pressure turbine 43 is rotated by the steam, whereby the generator 411 is driven and electric energy is generated. Further, when the low-pressure turbine 44 is rotated by steam, the generator 412 is driven, and electric energy is generated.

  Next, the remaining coal management system will be described. As shown in FIG. 2, the remaining coal management system is mainly configured by a boiler device 20, a coal bunker 11, a bunker row conveyor 32, a stored coal amount detection unit 111, a control unit 51, an input unit 52, and a notification unit 53. Has been.

  The stored coal amount detection unit 111 is provided in each of the six coal bunkers 11 and detects the amount of coal stored in each coal bunker 11. In the stored coal amount detection unit 111, specifically, the amount of coal is such that the height from the reference position to the upper surface of the stored and deposited coal is “˜m” in the coal bunker 11. In addition, it is detected at a height relative to the reference position. The stored coal amount detection unit 111 is connected to the control unit 51, and the height data detected by the stored coal amount detection unit 111 is sent to the control unit 51.

The control unit 51 mainly includes a CPU (not shown) and a storage medium (not shown). The storage medium stores a program for operating the CPU to perform various controls, a first predetermined amount of data that is a predetermined amount, and a second predetermined amount of data that is a predetermined amount. Yes.
When the first predetermined amount is in a state where trouble occurs in the coal delivery system, coal supply from the bunker row conveyor 32 stops and coal is not supplied to the coal bunker 11, and when the boiler device 20 is continuously driven in this state, The amount of coal is such that coal in the coal bunker 11 runs out, coal cannot be supplied from the coal bunker 11 to the boiler device 20, and the boiler device 20 must be stopped. Specifically, the value of the coal whose height is “9 m” with respect to the reference position is stored.
When the trouble occurs in the coal delivery system, the second predetermined amount stops supplying coal from the bunker line conveyor 32, coal is not supplied to the coal bunker 11, and when the boiler device 20 is continuously driven in this state, In this state, the amount of coal stored in the coal bunker 11 is an amount that becomes the first predetermined amount in a predetermined time that is a relatively short time. Specifically, the value of the coal whose height is “11 m” with respect to the reference position is stored.
The storage medium stores a desired required time input from the input unit 52 described later.

  The control unit 51 is electrically connected to the high-performance pulverized coal machine 22 of the boiler device 20, the coal conveyance amount detection unit 321 of the bunker line conveyor 32, the silo line conveyor 31, and the coal conveyance amount detection unit 321. ing. The control unit 51 performs control to change the combustion state of the boiler 21 by adjusting the amount of coal input from the high-performance pulverized coal machine 22 to the boiler 21. The control unit 51 controls the transport speed of coal transported by the bunker line conveyor 32 and the silo line conveyor 31. In addition, the control unit 51 detects that the amount of coal transported by the bunker row conveyor 32 is 0, so that the coal transport amount detection unit 321 detects a problem in the coal feeding system, and the bunker row conveyor 32 Recognizing that coal supply is stopped and coal is not supplied to the coal bunker 11.

  The notification unit 53 includes a monitor display unit, a first warning light, and a second warning light (not shown). As will be described later, when the coal stored in the coal bunker 11 is continuously burned by the boiler 21 after the supply of coal from the bunker row conveyor 32 to the coal bunker 11 is stopped, the bunker row conveyor 32 moves to the coal bunker 11. When the time until the amount of coal stored in the coal bunker 11 reaches a predetermined amount is calculated based on the amount of coal stored in the coal bunker 11 when the supply of coal is stopped, the calculated time Is displayed on the monitor display section for notification. Further, when the amount of coal stored in the coal bunker 11 detected by the stored coal amount detection unit 111 falls below the first predetermined amount, the first warning lamp blinks to notify. Further, when the stored amount of coal in the coal bunker 11 detected by the stored coal amount detection unit 111 is below the second predetermined amount and above the first predetermined amount, the second warning lamp blinks to notify.

  The input unit 52 is electrically connected to the control unit 51 and is configured by a keyboard (not shown) capable of inputting numbers. A desired time can be input to the keyboard. The desired required time is when a trouble occurs in the coal delivery system such as the bunker row conveyor 32, the coal is not supplied from the bunker row conveyor 32 to the coal bunker 11, and the boiler device 20 is continuously driven as it is. This is the desired time required until the amount of coal stored in the coal bunker 11 decreases and the amount of coal reaches the first predetermined amount or the second predetermined amount. It is possible to input a desired required time for each of the first predetermined amount or the second predetermined amount.

  For example, when trouble occurs in the coal feeding system such as the bunker row conveyor 32, the coal is not supplied from the bunker row conveyor 32 to the coal bunker 11, and calculated by the control unit 51 when the boiler device 20 is continuously driven. It is assumed that the time until the amount of coal stored in the coal bunker 11 reaches the first predetermined amount is 3 hours. It is assumed that it takes 4 hours to restore the coal transmission system. In this case, a value of “4 hours” can be input to the keyboard of the input unit 52 with respect to the first predetermined amount. Thereby, the control part 51 performs control which makes small the quantity of the coal per unit time thrown into the boiler 21 from the high performance pulverized coal machine 22 so that the boiler apparatus 20 may be continued to drive for 4 hours, and a boiler. Device 20 continues to drive for 4 hours. Therefore, it is not necessary to stop the boiler device 20 until the restoration work is completed.

  Similarly, for example, when a trouble occurs in the coal feeding system such as the bunker row conveyor 32, the coal is not supplied from the bunker row conveyor 32 to the coal bunker 11, and control is performed when the boiler device 20 is continuously driven. It is assumed that the time calculated by the unit 51 until the amount of coal stored in the coal bunker 11 reaches the second predetermined amount is 3 hours. It is assumed that it takes 4 hours to restore the coal transmission system. In this case, a value of “4 hours” can be input to the keyboard of the input unit 52 for the second predetermined amount. Thereby, the control part 51 performs control which makes the quantity of the coal per unit time thrown into the boiler 21 from the high performance pulverized coal machine 22 small so that it may drive the boiler apparatus 20 for 4 hours. Thus, the boiler device 20 can be driven for 4 hours until reaching the second predetermined amount, and can continue to be driven for a while. Therefore, it is not necessary to stop the boiler apparatus 20 until the restoration work is completed with a time margin as compared with the case where a desired time is set for the first predetermined amount.

Next, control by the control unit 51 will be described.
Trouble occurs in the coal delivery system such as the bunker row conveyor 32, and the amount of coal supplied from the bunker row conveyor 32 to the six coal bunker 11 is 0, that is, the six coal bunker 11 from the bunker row conveyor 32. When the control unit 51 recognizes that the supply of coal to all is stopped, first, the inside of the six coal bunker 11 at the time when the supply of coal from the bunker line conveyor 32 to all the six coal bunkers 11 is stopped. The amount of coal stored in each is detected (S1). Next, when the boiler device 20 is continuously driven based on the detected amount of coal, the time until the amount of coal stored in the coal bunker 11 becomes the first predetermined amount and the second predetermined amount is determined for each coal. The bunker 11 is calculated (S1). Next, the calculated time is displayed.

Next, in order to solve the trouble of the coal transmission system, it is determined whether or not the “desired required time” required for the restoration of the coal transmission system is input from the input unit 52 (S3). When the desired required time is not input (S3: NO), it is determined again whether the desired required time is input from the input unit 52 (S3).
When the desired required time is input as the time until the first predetermined amount is reached (S3: YES), when the boiler device 20 is continuously driven, the first predetermined amount is reached at the desired required time. Thus, the control part 51 calculates the combustion amount of the boiler apparatus 20 (S4). Further, when the desired required time is input as the time until the second predetermined amount is reached (S3: YES), when the boiler device 20 is continuously driven, the desired predetermined time is set to the second predetermined amount. Thus, the control unit 51 calculates the combustion amount of the boiler 21 (S4). Next, the control unit 51 controls each of the six high-performance pulverized coal machines 22 of the boiler device 20 so as to achieve the calculated combustion amount (S5), and the amount of coal per unit time supplied to the boiler 21. So that the boiler device 20 does not stop within the desired time. Within this desired time, a recovery operation is performed to solve the trouble in the coal transmission system, and the recovery operation is completed without stopping the boiler device 20.

According to this embodiment mentioned above, the following effects can be exhibited.
The control unit 51 is electrically connected to the boiler device 20, the bunker row conveyor 32, and the stored coal amount detection unit 111, and can control the amount of coal conveyed by the bunker row conveyor 32. The time until the amount of coal stored in each coal bunker 11 reaches the first predetermined amount or the second predetermined amount is calculated based on the amount of stored coal in each of the above. Moreover, it has the alerting | reporting part 53 for alert | reporting the time calculated by the control part 51. FIG.
For this reason, when trouble occurs in the coal delivery system and coal cannot be fed from the bunker row conveyor 32 to the coal bunker 11, the coal stored in the coal bunker 11 becomes the first predetermined amount or the second predetermined amount. You can check how long it takes to complete. For this reason, it is possible to confirm how long it is necessary to stop the driving of the boiler device 20 after the trouble occurs, and it can be compared with the time until the repair of the coal feeding system is completed. As a result, it is possible to easily determine whether or not to stop driving the boiler device 20 in order to complete the repair of the coal feeding system.

In addition, an input that is electrically connected to the control unit 51 and can input a desired time required until the amount of coal stored in the six coal bunker 11 reaches the first predetermined amount or the second predetermined amount. The control unit 51 includes a unit 52, and the storage amount of the coal stored in the coal bunker 11 becomes the first predetermined amount or the second predetermined amount at a desired required time input from the input unit 52. The combustion of coal in the boiler 21 is controlled.
For this reason, combustion of the boiler 21 can be controlled so that it is not necessary to stop the drive of the boiler apparatus 20 until repair of a coal feeding system is completed. For this reason, the repair of the coal transmission system can be completed efficiently at the power plant.

  Further, the first predetermined amount is used as the predetermined amount. The first predetermined amount is that when the boiler device 20 is continuously driven, the coal in the coal bunker 11 runs out and coal cannot be supplied from the coal bunker 11 to the boiler device 20, and the boiler device 20 must be stopped. Amount. The notification unit 53 notifies that the coal storage amount in the coal bunker 11 has reached the first predetermined amount. For this reason, it can grasp | ascertain easily that the storage amount of coal became the 1st predetermined amount.

  The second predetermined amount is used as the predetermined amount. The second predetermined amount is an amount in which the amount of coal stored in the coal bunker 11 becomes the first predetermined amount in a short time, and the notification unit 53 determines that the amount of coal stored in the coal bunker 11 is the second predetermined amount. Notify that it has become. For this reason, it can be easily grasped that the amount of coal stored has reached the second predetermined amount.

  The embodiment of the present invention is not limited to the above embodiment, and can be modified within the technical scope described in the claims. For example, the values of the first predetermined amount and the second predetermined amount are not limited to the values described in the present embodiment. Moreover, the number of coal bunker is not limited to six. Moreover, although the input part 52 was comprised with the keyboard, it is not limited to a keyboard. Moreover, although the alerting | reporting part 53 had a monitor display part, the 1st warning light, and the 2nd warning light, it is not limited to this structure.

DESCRIPTION OF SYMBOLS 11 Coal bunker 20 Boiler apparatus 21 Boiler 22 High performance pulverized coal machine 32 Bunker line conveyor 51 Control part 52 Input part 53 Notification part 111 Stored coal amount detection part

Claims (4)

Boiler equipment,
A plurality of coal bunker for storing coal and supplying the coal to the boiler device;
A conveyor for conveying coal from a coal silo to the plurality of coal bunker;
A stored coal amount detection unit capable of detecting a stored amount of coal stored in the plurality of coal bunker; and
A coal conveyance detection unit for detecting the amount of coal from the conveyor to the coal bunker;
The boiler unit, the storing coal amount detecting unit, and said electrically connected to the coal conveyance amount detection unit, said that the supply of coal is stopped coal conveyance amount detecting section detects from the conveyor to the coal bunker When the coal stored in the coal bunker continues to be burned by the boiler device , after that, based on the amount of coal stored in the coal bunker when the supply of coal from the conveyor to the coal bunker is stopped, A control unit that calculates a time until the amount of coal stored in the coal bunker reaches a predetermined amount;
A coal remaining amount management system comprising: a notifying unit for notifying the time calculated by the control unit. When the coal stored in the coal bunker is continuously burned by the boiler device after the coal supply from the conveyor to the coal bunker is stopped, the coal is continuously burned from the conveyor. An input unit capable of inputting a desired time until the amount of coal stored in the coal bunker at the time of stopping the supply of coal to the bunker reaches a predetermined amount;
The control unit performs combustion of coal in the boiler device so that the amount of coal stored in the coal bunker becomes the predetermined amount when the desired required time input from the input unit has elapsed. The remaining coal management system according to claim 1, wherein control is performed. The predetermined amount has a first predetermined amount, and the first predetermined amount is combusted by coal stored in the coal bunker by the boiler device after the supply of coal from the conveyor to the coal bunker is stopped. When the operation is continued, the coal in the coal bunker runs out, the coal bunker can no longer supply coal to the boiler device, and the boiler device must be stopped.
3. The remaining coal management system according to claim 1, wherein the notification unit notifies when the amount of coal stored in the coal bunker becomes the first predetermined amount. 4. The predetermined amount has a second predetermined amount, and the second predetermined amount is the coal stored in the coal bunker burned by the boiler device after the supply of coal from the conveyor to the coal bunker is stopped. The amount of coal stored in the coal bunker is the amount that becomes the first predetermined amount in a predetermined time,
The said alerting | reporting part alert | reports, when the amount of coal storage in the said coal bunker becomes the said 2nd predetermined amount, The coal residual amount management system of Claim 3 characterized by the above-mentioned.

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