JP2007264681A - Fuel storage quantity management system for plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that supply of fuel is continuously difficult due to a bad weather in a coal heat power plant, resulting in that the continuous operation of the plant may be hindered. <P>SOLUTION: This fuel storage quantity management system is configured of a temporal consumption storage means 2a for storing fuel consumption per unit time for the output of a plant 10; a temporal supply quantity storage means 2b for storing fuel supply quantity per time unit to the plant 10; a storage quantity transition prediction means 1a for predicting the transition of fuel storage quantity based on the operation plan and fuel supply plan of the plant 10; and a warning means 1b for issuing warning when it is predicted that the storage quantity of fuel is below the predetermined quantity by the storage quantity transition prediction means 1a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fuel holding amount management system for a plant that manages a fuel holding amount of coal or the like in a plant such as a coal-fired power plant.

  In the coal-fired power plant 10 shown in FIG. 2, the coal C transported by the coal ship 17 is landed on the coal storage 11 by the receiving conveyor 12. Coal C received in the coal storage 11 is supplied to the boiler 16 after the required amount of coal C is sent to the bunker 14 by the transport conveyor 13 according to the amount of power generation, pulverized by the mill 15. The coal holding amount of the coal storage 11 is strictly managed so as not to hinder the continuous operation of the plant 10.

  Conventionally, management of the amount of coal held in a coal-fired power plant is performed by monitoring the amount of coal remaining in the coal storage yard by measuring the amount of coal in the coal storage yard with a residual coal amount monitoring device (for example, see Patent Document 1). In addition, the coal holding amount of the coal storage yard is managed by creating an arrangement plan of the coal yard based on the coal acceptance and coal transfer plans (see, for example, Patent Document 2).

JP-A-10-132511 JP-A-7-141430

  However, the conventional residual coal amount monitoring device can only monitor the residual coal amount in the coal yard. In addition, if the coal holdings of the coal storage yard continue to be difficult for coal ships to enter due to bad weather, etc., the planned coal will not be received and will decrease from the planned value. There is a problem that there is a risk of hindering continuous operation of the car. Furthermore, in a power plant with space restrictions at the coal yard, there is a risk that continuous operation may be hindered due to the difficulty of entering a coal ship for a short period of time.

  Therefore, in order to solve the above problems, the present invention provides a time consumption storage means for storing the fuel consumption per unit time with respect to the output of the plant, and a time for storing the fuel acceptance amount per unit time to the plant. The received amount storage means, the retained amount transition predicting means for predicting the change of the fuel holding amount based on the operation plan of the plant and the fuel receiving plan, and the held amount transition predicting means has the fuel holding amount lower than the predetermined amount It is intended to provide a fuel holding amount management system for a plant comprising warning means for issuing a warning when it is predicted.

  The present invention further comprises operation plan correction means for correcting to an operation plan in which the output of the plant is suppressed when the possession amount transition prediction means predicts that the amount of fuel held is below a predetermined amount. The fuel holding amount management system of the plant described in 1. is provided.

  The plant fuel according to claim 1 or 2, wherein the plant comprises a coal-fired power plant, and the possession amount transition predicting means predicts the transition of the coal possession amount in the coal storage and the bunker. A holding amount management system is provided.

  According to the fuel holding amount management system for a plant according to the present invention, the time consumption storing means for storing the fuel consumption per unit time with respect to the output of the plant, and the amount of fuel received per unit time for the plant are stored. Time acceptance amount storage means, possession amount transition prediction means for predicting the transition of the fuel possession amount based on the operation plan of the plant and the fuel acceptance plan, and the possession amount transition prediction means By having a configuration comprising a warning means that issues a warning when it is predicted to be below, it is possible to accurately predict the transition of the amount of fuel held in the plant by the hour, and it is difficult to accept fuel due to bad weather etc. When it is expected to continue, a warning will be issued in anticipation that the fuel holding amount will fall below a predetermined amount that will interfere with the continuous operation of the plant. There is an effect that it is possible to avoid the influence of up to door of the operation in advance.

  The present invention further comprises operation plan correction means for correcting to an operation plan in which the output of the plant is suppressed when the possession amount transition prediction means predicts that the amount of fuel held is below a predetermined amount. By having the configuration described in (4), there is an effect that it is possible to automatically avoid a shortage of fuel in the plant and maintain stable operation.

  Moreover, this invention has the structure of Claim 1 or 2 which the said plant consists of a coal-fired power plant, and the said holding | maintenance amount transition prediction means predicts the transition of the coal holding amount in a coal storage yard and a bunker. As a result, it is possible to predict not only the coal storage but also the change in the amount of coal held in the bunker, so that it is possible to accurately predict the change in the amount of remaining coal in the coal-fired power plant.

Embodiments of the present invention will be described based on examples shown in the drawings.
The plant fuel holding amount management system according to the present invention stores a time consumption storage means 2a that stores a fuel consumption amount per unit time with respect to an output of the plant 10, and a fuel acceptance amount per unit time to the plant 10. Time storage amount storage means 2b, possession amount transition prediction means 1a for predicting the transition of the fuel possession amount based on the operation plan of the plant 10 and the fuel acceptance plan, and the possession amount transition prediction means 1a The warning means 1b is configured to issue a warning when the quantity is predicted to be below a predetermined quantity.

In the illustrated embodiment, the plant 10 is a coal fired power plant.
A coal-fired power plant 10 shown in FIG. 2 includes a coal storage 11 that stores coal C, a mill 15 that pulverizes the coal C, a boiler 16 that burns the pulverized coal C, and a steam turbine (not shown). The coal storage 11 stores coal C received by the receiving conveyor 12 from the coal ship 17, and sends the required amount to the bunker 14 by the transport conveyor 13 according to the amount of power generation. The mill 15 is configured to pulverize the coal C stored in the bunker 14 and supply it to the boiler 16.

In FIG. 1, reference numeral 1 denotes an arithmetic unit, which includes a possession amount transition prediction unit 1a and a warning unit 1b. Reference numeral 2 denotes a storage device, which includes a time consumption storage means 2a and a time acceptance amount storage means 2b. 3 is a monitor and 4 is a printer.
The time consumption storage means 2a stores the coal consumption per unit time that is supplied from the mill 15 to the boiler 16 and consumed according to the target power generation amount (output value). Moreover, the time received amount storage means 2b stores the amount of coal received per unit time that can be received in the coal storage 1 by the receiving conveyor 12.

  The holding amount transition prediction means 1a predicts the consumption amount of coal C based on the operation plan (output plan) of the plant 10 and the coal consumption amount per unit time stored in the time consumption storage means 2a and corresponding to the output value. You can do that. Further, the holding amount transition prediction unit 1a predicts the amount of coal C received based on the coal C reception plan to the coal storage 11 and the coal reception amount per unit time stored in the time reception amount storage unit 2b. I can do it. The holding amount transition predicting means 1a is configured to be able to predict the transition of the coal holding amount in the coal storage 11 and the bunker 14 based on the prediction of the consumption amount and the acceptance amount of the coal C.

  The warning means 1b monitors the warning display together with the coal possession quantity transition prediction graph when the possession quantity transition prediction means 1a predicts that the coal possession quantity in the coal storage 11 and the bunker 14 is lower than the operational lower limit value. Or on the printer 4 or the like, so that a warning can be issued.

  In the illustrated embodiment, the retained amount transition predicting unit 1a includes an operation plan correcting unit that corrects the operation plan to suppress the output of the plant 10 when the coal retained amount is predicted to be below the lower limit value in operation. Yes. As shown in FIG. 3, the operation plan correcting means predicted that the possessed amount transition predicting means 1a maintained the target output (broken line in the figure) that the coal retained amount would fall below the operational lower limit value. Sometimes, it is configured so that it can be automatically corrected to an operation plan (solid line in the figure) in which the output of the plant 10 is suppressed so that the coal holding amount can be maintained at an amount equal to or higher than the operational lower limit. is there.

  In addition, the fuel holding amount management system of the plant which concerns on this invention can also be used for management of the fuel holding amount of the plant which uses not only the coal-fired power plant 10 but other fuels, such as heavy oil and light oil.

The block diagram which shows one Example of the fuel holding amount management system which concerns on this invention. The block diagram of the plant of the one Example. The table | surface which shows the one operation state of the one Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Arithmetic unit 1a Holding amount transition prediction means 1b Warning means 2 Storage device 2a Time consumption amount storage means 2b Time reception amount storage means 3 Monitor 4 Printer 10 Plant 11 Coal storage area 12 Reception conveyor 13 Transport conveyor 14 Bunker 15 Mill 16 Boiler 17 Coal Ship C Coal

Claims (3)

  Time consumption storage means for storing fuel consumption per unit time relative to the output of the plant, time reception amount storage means for storing fuel reception amount per unit time to the plant, operation plan of the plant and fuel A plant comprising a holding amount transition predicting unit that predicts a change in the amount of fuel held based on an acceptance plan, and a warning unit that issues a warning when the holding amount transition predicting unit predicts that the amount of fuel held is below a predetermined amount Fuel holding management system.   The plant fuel according to claim 1, further comprising an operation plan correction unit that corrects the operation plan to suppress an output of the plant when the holding amount transition prediction unit predicts that the amount of fuel held is below a predetermined amount. Holding amount management system. The plant fuel holding amount management system according to claim 1 or 2, wherein the plant comprises a coal-fired power plant, and the holding amount transition predicting means predicts the transition of the coal holding amount in the coal storage and the bunker.

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