JP4986525B2 - Coal seed management method and coal seed management system - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a coal type management method and a coal type management system for managing raw coal stored in a bunker in a facility that uses a plurality of types of raw coal as fuel.

  2. Description of the Related Art Conventionally, thermal power plants that use coal as fuel use a plurality of types of coking coal in order to reduce environmental burden as much as possible and increase energy efficiency and perform stable operation. At this time, since the water content, the calorific value, the contained components, and the like differ for each coal type of the raw coal, it is necessary to appropriately manage the raw coal amount supplied to the boiler.

  As such a coal type management method, when a different type of coal is mixed and used as fuel in JP-A-8-258960 (Patent Document 1) “Method and apparatus for supplying coal to a bunker”, a mixed coal hopper is used in advance. Thus, a technique for saving labor by eliminating the step of mixing different types of coal is disclosed.

  The “coal supply method and apparatus to bunker” described in this patent document 1 supplies different types of coal for each bunker at a predetermined ratio from a plurality of conveyors when supplying coal to a bunker unit. However, the process of mixing the coal in the coal hopper is omitted by comprehensively mixing the fuel coal at a predetermined ratio at the time when the bunker is introduced into the boiler.

JP-A-8-258960

  By the way, the coking coal carried into the raw material yard is changed flexibly according to the price of coking coal, the production amount, and the like. For this reason, managing the raw coal used for each coal type according to the coal type of the raw coal brought into the raw material yard reduces the burden on the environment as much as possible and increases the energy efficiency to perform stable operation. Is important for.

  However, the “coal supply method and apparatus to bunker” described in Patent Document 1 above is a technique for mixing raw coals of different coal types at a predetermined ratio and supplying them to each bunker. The bunker stores coking coal mixed at the same ratio. That is, in the technique described in Patent Document 1, the mixing ratio of the raw coal supplied to the boiler could not be changed flexibly according to the type of raw coal supplied to the raw yard. .

In this regard, depending on the coal type of the raw coal to be carried into the raw material yard, the raw coal is introduced into a plurality of bunker each time, and the raw coal supplied from each bunker to the boiler via the pulverized coal machine is classified for each coal type. If managed in this manner, the coal type can be managed efficiently.
In general, when managing the coal type for each bunker, the raw coal is stacked in each bunker with a predetermined number of layers as the upper limit. For this reason, even if there is a margin in the bunker capacity, when the number of stacks reaches the upper limit (for example, 3 layers), it is not possible to stack new coking coal, and efficient coal type management is possible. In some cases, this was not possible.

  The present invention has been proposed in view of the above-described circumstances, and in a facility that uses a plurality of types of raw coal as fuel, when managing the coal type of the raw coal for each bunker, the coal type is efficiently managed. Thus, an object of the present invention is to provide a coal type management method and a coal type management system capable of reducing the burden on the environment as much as possible and increasing the energy efficiency and performing stable operation.

The coal type management method and the coal type management system according to the present invention have the following features in order to achieve the above-described object.
That is, the coal type management method according to the present invention is:
A facility that uses a plurality of types of coking coal having different properties as fuel, comprising a coal type discriminating means, a stacking means, a split coal quantity storage means, and a split coal quantity storage update means, and stored in a bunker A coal type management method for managing coking coal,
The step of determining the type of raw coal put into the bunker by the charcoal type determining means ,
Laminating raw coal in the bunker with a predetermined number of layers as an upper limit by the laminating means ;
A step of storing the coal splitting amount of each coal splitting layer by the coal splitting amount storage means ;
When the adjacent coal separation layers are made of the same kind of raw coal, the coal distribution memory update means regards both as the same layer and updates the stored value by summing the coal distribution amounts of both coal separation layers. Steps,
When the coal quantity storage updating means regards adjacent coal distribution layers as the same layer, the upper limit of the predetermined number of layers is set above the coal distribution layer regarded as the same coal distribution layer by the stacking means. And a step of laminating new raw coals in this order.

In this case, a coal type change timing grasping means is further provided, and supplied from the bunker by the coal type change timing grasping means based on the stored value of the coal distribution amount in the step of storing the coal distribution amount of each coal layer. It is preferable to include a step of grasping the change timing of the coal type to be used.

Further, in the step of updating the stored value of the split coal amount, when the raw coal of the same coal type is further stacked on the upper part of the split coal layer regarded as the same split coal layer, the updated split coal amount memory is updated. It is preferable not to perform the total amount of coal splitting by means .

  The coal type management system according to the present invention is a coal type management system for managing coking coal stored in a bunker in a facility that uses a plurality of types of coking coal having different properties as fuel. A coal type discriminating means for discriminating the type of coking coal to be put in, a laminating means for laminating coking coal in the bunker up to a predetermined number of layers, When the coal quantity storage means and the coal separation layers adjacent to each other are made of the same kind of raw coal, both are regarded as the same layer, and the coal quantity stored in the coal quantity storage means is summed and updated. A coal quantity storage updating means, and the stacking means laminates new raw coal on the upper part of the coal distribution layer where the quantity of coal split is summed by the coal quantity storage update means, up to a predetermined number of layers. It is characterized by doing.

  In this case, it is preferable to provide a coal type change timing grasping means for grasping a change timing of the coal type supplied from the bunker based on the stored value stored in the coal distribution amount storage means.

  In the coal type management method and the coal type management system according to the present invention, when the adjacent coal separation layers are made of the same type of raw coal, they are regarded as the same layer, and the coal distribution amounts of both coal separation layers are summed up. As a result, the apparent number of stacks can be reduced by one, and new raw coal can be stacked on the upper part of the split coal layer regarded as the same split coal layer with the predetermined number of layers as the upper limit. Therefore, if there is a margin in the bunker capacity, more coking coal can be stored in the bunker, and the coal type can be managed efficiently.

  In addition, by grasping the timing of the change of the coal type supplied from the bunker based on the stored value of the coal distribution, it is possible to perform more appropriate and reliable management, reducing the environmental burden as much as possible and energy efficiency. The stable operation can be performed by increasing

  In addition, when coking coal of the same coal type is further stacked on the upper part of the coal separation layer regarded as the same coal separation layer, the sum of the coal separation amounts is determined by not performing the total coal separation amount. It is possible to prevent the situation where the processing is continuously performed and the raw coal exceeding the bunker capacity is input.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a coal type management method and a coal type management system according to the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of a coal type management method and a coal type management system according to an embodiment of the present invention. FIG. 1 is a block diagram showing a schematic configuration of the coal type management system, and FIG. The flowchart which shows the procedure of a seed management method, FIG. 3 is a schematic diagram explaining the procedure of a coal seed management method.

  The coal type management method and the coal type management system according to the embodiment of the present invention are, for example, for managing raw coal supplied to a boiler facility of a thermal power plant, and are adjacent to each other in raw coal stored in a bunker. When the split coal layer is made of the same type of coking coal, both are regarded as the same layer, and by adding the split coal amount of both split coal layers, the apparent number of layers is reduced by one layer, and the same split coal layer It is characterized in that a new raw coal is stacked on the upper part of the coal separation layer regarded as being an upper limit of a predetermined number of layers.

  Specifically, as shown in FIG. 1, the coal type management system 10 according to the embodiment of the present invention includes a coal type discriminating unit 11, a stacking unit 12, a divided coal amount storage unit 13, and a divided coal amount storage update unit. 14 is a main component and further includes a coal type change timing grasping means 15.

  Each means includes a computer system having functions such as a CPU, RAM, ROM, and its peripheral devices, and the CPU constituting the computer system operates according to the application program so that the function as each means is exhibited. It has become.

  The charcoal type discriminating means 11 is a means for discriminating the type of raw coal supplied into the bunker, and discriminates the type of raw coal supplied into the bunker according to the operation of the operator. In addition, as for the raw coal to be carried into the raw material yard, a coal type brand is registered for each block, and when the raw coal is introduced into each bunker, the coal type to be introduced into the bunker is designated by an operator's instruction. In addition, it is possible to have a system configuration in which the coal type and the amount of saving of coking coal stored in the raw material yard are grasped in advance, and the coal type is automatically selected according to the operation status and supplied to the bunker. .

  The stacking means 12 is a means for stacking coking coal in the bunker with a predetermined number of layers as an upper limit. For example, coking coal is stacked in the bunker with an upper limit of three layers. For example, in the case of a bunker capable of storing about 1000 tons of raw coal, it can be set to store about 200 tons of raw coal for each layer. As will be described in detail later, in the present invention, the amount of coal splitting in adjacent coal splitting layers is totaled, so that the total coal splitting layer can store about 400 t of raw coal. That is, when the coal splitting amount is added up in the adjacent coal splitting layers, new raw coal is stacked on the upper part of the splitting coal layer with a predetermined number of layers (for example, three layers) as an upper limit.

  The coal quantity storage unit 13 is a unit for storing the coal quantity of the coal layer, and includes a large capacity storage device such as a hard disk storage device.

  When the coal distribution layers adjacent to each other are made of the same type of raw coal, the coal distribution amount storage updating unit 14 regards both as the same layer, and sums the coal distribution amounts stored in the coal distribution amount storage unit 13. It is a means for updating.

  The coal type change timing grasping means 15 is means for grasping the change timing of the coal type supplied from the bunker based on the stored value stored in the coal distribution amount storage means 13. For example, if the coal type A is stored for about 200t, the B type is about 400t, and the C type is stored for about 200t from the lower layer of the banca, 15, the time to switch from coal A to B is about 13.3 hours, and the time to switch from B to C is about 40 hours (about 26.7 hours from the time of switching B After).

  Although not shown, the computer system constituting the coal type management system 10 according to the embodiment of the present invention includes, as peripheral devices, input means such as a keyboard and a mouse, and display means such as a liquid crystal display device and a CRT display device. And printing means such as a printer are connected. Accordingly, an instruction from the operator is input by the input means, various information such as the bunker level and the coal type switching time is displayed by the display means, and various information such as the bunker level and the coal type switching time is printed by the printing means.

  Next, the procedure of the coal type management method according to the embodiment of the present invention will be described. In the coal type management method according to the embodiment of the present invention, as shown in FIG. 2, first, the type of coking coal to be put into the bunker is determined (S1), and a predetermined number of layers (for example, three layers) is determined. Coal coal is stacked in the bunker as the upper limit (S2), and the coal distribution amount of each stacked coal distribution layer is stored (S3).

  Subsequently, it is determined whether or not adjacent coal separation layers are of the same type (S4), and if both are made of the same type of raw coal, it is determined whether or not the total amount of coal distribution has already been performed. (S5). Here, in the case where the total coal amount has not yet been performed, both are regarded as the same layer, and the stored value is updated by summing the coal amount of both coal layers (S6). On the other hand, if the total amount of coal separation has already been performed, the process proceeds to the next step without performing the total amount of coal separation.

  Moreover, in order to perform appropriate and reliable management, the change timing of the coal type supplied from the bunker is grasped based on the stored value of the coal distribution amount (S7), and the grasped change timing of the coal type is notified ( S8) is preferable.

  Then, the process returns to the coal type discrimination process (S1), and the subsequent processes (S2 to S8) are repeated. In addition, when the coal separation layers adjacent to each other are regarded as the same layer, new raw coal is stacked on the upper part of the coal separation layer regarded as the same coal separation layer with a predetermined number of layers as an upper limit.

  With reference to FIG. 3, the procedure of the coal type management method according to the embodiment of the present invention will be described more specifically. In the example shown in FIG. 3, the upper limit value of the raw coal is 3 layers.

  In the example shown in FIG. 3 (a), the case where A coal type is present in the lowermost layer and the B coal type is laminated over two layers on the uppermost layer is shown. In this case, the coal is laminated over two layers. The coal distribution amount of the B coal type is regarded as one layer and the coal distribution amount is totaled. Since the remaining one layer of raw coal can be stacked until reaching the upper limit of stacking, C-type raw coal can be further stacked on top of the B-type split-type coal layer.

  In the example shown in FIG. 3 (b), there are two types of coal A from the bottom, and the case where the coal B is laminated on the upper part is shown. In this case, two types of layers are laminated. The coal distribution amount of coal type A is regarded as one layer and the amount of coal distribution is totaled. Since the remaining one layer of raw coal can be stacked until reaching the upper limit of stacking, C-type raw coal can be further stacked on top of the B-type split-type coal layer.

  The example shown in FIG. 3 (c) shows a case where D coal type, A coal type, and B coal type are laminated upward from the lowest layer. In this case, Therefore, the coal separation layer cannot be stacked until the lowermost D coal type is used up. Then, when the D coal type is used up, the C coal type raw coal can be further laminated on the upper part of the B coal type coal distribution layer.

The upper limit of stacking of coking coal is not limited to 3 layers, and it is implemented by changing appropriately 2 layers, 4 layers, 5 layers, etc. according to the capacity of the bunker, the type of coking coal used, the operating status of the equipment, etc. can do.
In the above-described embodiment, one bunker has been described. However, in a facility including a plurality (for example, six) of bunker, the above-described coal type management method can be performed for each bunker.

  The coal type management method and the coal type management system 10 of the present invention manage raw coal stored in a bunker in equipment that uses a plurality of types of raw coal as fuel, such as boiler equipment of a thermal power plant. Can be used for.

1 is a block diagram showing a schematic configuration of a coal type management system according to an embodiment of the present invention. It is a flowchart which shows the procedure of the coal seed management method which concerns on embodiment of this invention. It is a schematic diagram explaining the procedure of the coal type management method which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Coal type management system 11 Coal type discrimination | determination means 12 Stacking means 13 Divided coal quantity storage means 14 Divided coal quantity storage update means 15 Coal type change timing grasping means

Claims (5)

A facility that uses a plurality of types of coking coal having different properties as fuel, comprising a coal type discriminating means, a stacking means, a split coal quantity storage means, and a split coal quantity storage update means, and stored in a bunker A coal type management method for managing coking coal,
The step of determining the type of raw coal put into the bunker by the charcoal type determining means ,
Laminating raw coal in the bunker with a predetermined number of layers as an upper limit by the laminating means ;
A step of storing the coal splitting amount of each coal splitting layer by the coal splitting amount storage means ;
When the adjacent coal separation layers are made of the same kind of raw coal, the coal distribution memory update means regards both as the same layer and updates the stored value by summing the coal distribution amounts of both coal separation layers. Steps,
When the coal quantity storage updating means regards adjacent coal distribution layers as the same layer, the upper limit of the predetermined number of layers is set above the coal distribution layer regarded as the same coal distribution layer by the stacking means. And a step of laminating new raw coals in this order. Further equipped with means for grasping the timing of changing the coal type,
Including the step of grasping the change timing of the coal type supplied from the bunker by the coal type change timing grasping means based on the stored value of the coal separation amount in the step of storing the coal separation amount of each coal separation layer. The coal type management method according to claim 1. In the step of updating the stored value of the split coal amount, when the raw coal of the same coal type is further stacked on the upper portion of the split coal layer regarded as the same split coal layer, the split coal amount storage updating means The coal type management method according to claim 1 or 2, wherein the total amount of coal separation is not performed. In a facility that uses a plurality of types of coking coal having different properties as fuel, a coal type management system for managing the coking coal stored in the bunker,
Coal type discriminating means for discriminating the type of coking coal to be put into the bunker;
Laminating means for laminating raw coal in the bunker up to a predetermined number of layers,
A coal quantity storage means for storing the coal quantity of each coal layer;
When adjacent coal separation layers are made of the same type of coking coal, both are regarded as the same layer, and a coal distribution amount storage updating unit that updates the total coal distribution amount stored in the coal distribution amount storage unit; With
The stacking means stacks new raw coal on the upper part of the split coal layer in which the split coal amount is summed by the split coal amount storage update means, with a predetermined number of layers as an upper limit. .   The coal type change timing grasping means for grasping the change timing of the coal type supplied from the bunker based on the stored value stored in the coal quantity storage means. Coal seed management system.

Images