JP2005272550A - Coal charge control method and charge control device for coke oven carbonization chamber - Google Patents

Abstract

[PROBLEMS] By appropriately controlling the amount of coal charged into each carbonization chamber, it is possible to prevent clogging of the charging hole in the carbonization chamber, ensure operational stability, and improve productivity. Provided is a method for controlling the amount of coal charged into a coke oven carbonization chamber and a device for controlling the amount of charging.
[Solution]
Based on the return coal amount measuring step for measuring the return coal amount discharged from the carbonization chamber for each carbonization chamber, and the coal to be charged into the next carbonization chamber based on the return coal amount measured in the return coal amount measurement step A coal amount calculating step for calculating the amount.
[Selection] Figure 1

Description

  The present invention relates to a method for controlling the charging amount of coal into a coke oven carbonization chamber and a charging amount control device capable of efficiently charging coal into the coking chamber in a coke oven.

  In a coke oven that carbonizes coal into coke, combustion chambers and carbonization chambers are alternately arranged, and the combustion chambers and the carbonization chamber are partitioned by refractory brick partitions (furnace wall bricks). The charcoal chamber is charged with coal loaded on the hopper of the charging vehicle from above. Coal is dry-distilled with heat from combustion chambers arranged on both sides of the carbonization chamber to produce coke. The carbonized coke is pushed from the side by the extrusion ram of the extruder and discharged from the carbonization chamber.

  Since charging of coal into the carbonization chamber from the charging vehicle is normally performed from charging holes provided at 4 to 5 locations, immediately after the charging of coal, peaks and valleys are formed by the charged coal. Then, in order to smooth the peaks and valleys of the charged coal, the upper surface of the charged coal is leveled by, for example, reciprocating a leveler.

  When leveling by the leveler is performed, surplus coal charged to a predetermined management level or higher is discharged out of the carbonization chamber together with the leveler withdrawal. The coal discharged outside the carbonization chamber is called “return coal”.

  The return charcoal is collected in a hopper for storing the return charcoal. In actual operation, for example, the return coal stored in the hopper is discharged at the time when the return coal for 10 carbonization chambers (hereinafter, the number of carbonization chambers is counted by “kiln”) is stored, and the return is made at the time of discharge. The total mass of charcoal was measured, and the amount of returned charcoal per one carbonization chamber was calculated by dividing by the number of stored return charcoal kilns, here 10 kilns.

  Then, the amount of returned coal per kiln obtained by the calculation is compared with the amount of returned coal when an appropriate amount of coal is charged into the carbonizing chamber, that is, a predetermined control value. The amount of coal charged into the subsequent carbonization chamber was adjusted. Specifically, when the amount of returned coal per one carbonization chamber exceeds the upper limit of the control value, the amount of coal charged into the subsequent carbonization chamber is reduced by a predetermined amount, When the amount of returned coal is below the lower limit of the control value, management is performed to increase the amount of coal to be charged into the subsequent carbonization chamber by a predetermined amount, and management is performed to obtain an appropriate amount of coal. It was.

  This is based on the premise that the volume of each carbonization chamber is naturally the same in terms of design, and the amount of returned coal from a plurality of carbonization chambers (here, 10 kilns) is averaged to suppress variations. This is because an attempt was made to accurately grasp the amount of coal charged into the carbonization chamber. Note that the appropriate amount of coal to be charged into the carbonization chamber varies depending on the properties of the coal, for example, the water content and the particle size.

  However, the amount of return coal per one carbonization chamber is calculated by averaging the amount of return coal from the plurality of carbonization chambers described above, and the amount of coal charged into the subsequent carbonization chambers based on that value. In this method, there are carbonization chambers where the coal charge exceeds the control value and clogging occurs, and there is a carbonization chamber where the coal charge is lower than the control value, impairing operational stability and productivity. There was a problem.

  The present invention has been made to solve the above problems, and by appropriately managing the amount of coal charged into each carbonization chamber, the charging hole in the carbonization chamber is prevented from being clogged, and the stability of the operation is improved. An object of the present invention is to provide a method for controlling the amount of coal charged into a coke oven carbonization chamber and a device for controlling the amount of charging, which can ensure productivity and improve productivity.

  Conventionally, the difference in the amount of return coal for each carbonization chamber was thought to be due to variations. Therefore, the amount of return coal from individual carbonization chambers was averaged to suppress variation, and an attempt was made to grasp the exact amount of return coal.

  However, by averaging the amount of return coal from multiple carbonization chambers, the amount of return coal per kiln is calculated, and the amount of coal charged into the subsequent carbonization chambers is adjusted based on that value. In this method, as described above, there may be a carbonization chamber in which the coal charge exceeds the control value and the charging hole is clogged, and there is a carbonization chamber in which the coal charge is lower than the control value.

  As a result of the examination by the present inventors, the variation in the amount of return coal is not so large for the same carbonization chamber, and the difference in the amount of return coal is due to the difference in the volume of the carbonization chamber itself. It has been found.

  When the volume of each carbonization chamber was examined anew, it was found that there were a great number of irregularities in the carbonization chamber, which greatly affected the volume. In other words, the volume of the carbonization chamber is constant by design, but due to factors such as carbon adhesion, repair material adhesion, and brick wear in the carbonization chamber, there are a large number of irregularities that are larger than normally thought. It became clear that there was variation.

  Based on the above knowledge, in order to properly manage the amount of coal charged into the carbonization chamber, measure the amount of return coal for each carbonization chamber and adjust the amount of coal charged for each carbonization chamber based on that. I found it necessary to do.

The present invention has been made based on the above findings and has the following characteristics.
[1] A return coal quantity measuring step for measuring the return coal quantity discharged from the carbonization chamber for each carbonization chamber;
A coal amount calculation step of calculating a coal amount to be charged into the next carbonization chamber based on the return coal amount measured in the return coal amount measurement step; Charge control method.
[2] Return coal quantity measuring means for measuring the return coal quantity discharged from the carbonization chamber for each carbonization chamber;
A coal amount calculating means for calculating a coal amount to be charged into the carbonization chamber next time based on the return coal amount measured by the return coal amount measuring means; Charge control device.

  According to the present invention, by appropriately managing the amount of coal charged into each carbonization chamber, the charging hole in the carbonization chamber is prevented from being clogged to ensure operational stability and improve productivity. A method and apparatus for controlling the amount of coal charged into a coke oven carbonization chamber are provided.

  Hereinafter, an example of the best mode for carrying out the present invention will be described.

  FIG. 1 is a functional explanatory diagram showing an example of a coal charge control device for a coke oven carbonization chamber according to the present invention. The charging amount control apparatus 1 shown in FIG. 1 includes a return coal amount measuring means 10 that measures the return coal amount discharged from the carbonization chamber for each carbonization chamber, and the return coal amount measured by the return coal amount measurement means 10. And a coal amount calculation means 20 for calculating the coal amount to be charged into the next carbonization chamber 2 based on the above.

  Hereinafter, each of the means will be described.

[Return coal quantity measuring means 10]
The return coal quantity measuring means 10 measures the return coal quantity discharged from the carbonization chamber for each carbonization chamber. Here, when the coal upper surface is leveled with a leveler after charging the coal into the carbonization chamber, the amount of return coal discharged outside the carbonization chamber together with the leveler withdrawal is measured for each carbonization chamber.

  The method of measuring the amount of return coal discharged from the carbonization chamber is not particularly limited as long as it can be measured in a form that can identify the mass of the return coal discharged from which carbonization chamber. As a method, for example, a mass meter is provided in a hopper for storing return coal, a method of measuring the mass of return coal, a mass provided on a conveyor for conveying the return coal recovered from the carbonization chamber A method of measuring the mass of return coal collected for each carbonization chamber by a meter, and setting a limit switch on the conveyor for conveying the return coal collected from the carbonization chamber, and calculating the mass of return coal from the time when the coal passes A method for obtaining by calculation can be used. In this case, from the charging schedule of the coal into the carbonization chamber or the like, it can be easily identified which return coal is discharged from which carbonization chamber.

[Coal amount calculation means 20]
The coal quantity calculation means 20 calculates the coal quantity to be charged in the next carbonization chamber based on the return coal quantity measured by the return coal quantity measurement means 10. The amount of coal calculated by the coal amount calculation means 20 is charged into the next carbonization chamber.

  Here, as the calculation method of the coal amount, for example, when the return coal amount measured for each carbonization chamber exceeds the upper limit of a predetermined control value, the coal amount to be charged into the carbonization chamber next time When the return coal quantity measured for each carbonization chamber is below the lower limit of the predetermined control value, the coal quantity to be charged into the carbonization chamber next time is increased by a predetermined amount. Such a calculation is performed.

  Hereinafter, an example of a calculation method will be described more specifically.

Consider a case where the amount of returned coal when a coal of a charging amount α (ton) is charged into a certain carbonization chamber A is β (ton). When the control value is k, the coal amount γ (ton) charged in the next carbonization chamber A is obtained by the following equation (1).
γ = α ± f (β, k) (1)
Here, f represents a function for obtaining a difference or regression between the return coal amount β and the management value k, and is − (minus) when β> k, and + (plus) when β <k.

  The coal charging amount α (ton) into the carbonization chamber A is a value measured by, for example, a change in mass of the charging vehicle hopper before and after charging. Further, the control value k is the amount of return coal when the optimum amount of coal that can be efficiently and efficiently subjected to dry distillation of coal in the carbonization chamber is charged. The optimum amount of coal that can be uniformly and efficiently subjected to dry distillation of coal in the carbonization chamber is a value that varies depending on the properties of the coal, for example, water content or particle size.

  In this means, it is possible to calculate an appropriate next coal charge amount easily and quickly by managing the amount of return coal from each carbonization chamber.

  In the coke oven to which the present invention is applicable, the value of the charging amount α (ton) is about 25 to 35 (ton), and the value of the return coal amount β (ton) is 0 to A value of about 0.1 to 0.2 (ton) is used as the value of about 0.3 (ton) and the management value k.

  The calculation of the coal charge for each carbonization chamber may be performed by adjusting the next coal charge amount to the carbonization chamber based on one return coal amount as described above. For example, the amount of coal to be charged next may be calculated from the average value of the most recently measured values of the return coal amount twice or three times.

  Moreover, in the above-mentioned embodiment, it has the carbon adhesion amount estimation means which estimates the carbon adhesion amount in the carbonization chamber from the amount of returned coal from each carbonization chamber, and based on the estimated amount of the carbon adhesion amount Repair, for example, whether or not to remove the carbon deposited on the furnace wall bricks in the carbonization chamber by heating without charging the coal into the carbonization chamber You may make it have. Here, the carbon adhesion amount can be estimated, for example, by measuring the transition of the coal charge amount and the return coal amount into each carbonization chamber.

It is function explanatory drawing which shows an example of the charging amount control apparatus of the coal to the coke oven carbonization chamber which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Charge amount control apparatus 10 Return coal quantity measurement means 20 Coal quantity calculation means

Claims (2)

A return coal quantity measuring step for measuring the return coal quantity discharged from the carbonization chamber for each carbonization chamber;
A coal amount calculation step of calculating a coal amount to be charged into the next carbonization chamber based on the return coal amount measured in the return coal amount measurement step; Charge control method. Return coal quantity measuring means for measuring the return coal quantity discharged from the carbonization chamber for each carbonization chamber;
And a coal amount calculating means for calculating a coal amount to be charged into the carbonization chamber next time based on the return coal amount measured by the return coal amount measuring means. Charge control device.

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