JP2006104259A - Charge rate measuring apparatus of coal charge into coke oven and charge rate measuring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charge rate measuring apparatus of coal charge into a coke oven, capable of accurately grasping an actual charge rate of each of carbonizing chambers, without being affected by an operating condition, and to provide a charge rate measuring method. <P>SOLUTION: This charge rate measuring apparatus for measuring a charge rate of the coal charge concerning the coke oven is equipped with a first load cell, a recovery hopper 21, a second load cell 21i, and an actual charge rate calculation means, wherein the first load cell is mounted on each of coal charge vehicle hoppers of a coal charge vehicle and weighs an amount of coal received in the coal charge vehicle hopper and an amount of coal remaining therein, the recovery hopper 21 recovers returned coal discharged from the oven to the outside accompanied with a leveler when the leveler is operated, the second load cell 21i is mounted on the recovery hopper 21 and weighs an amount of the returned coal which is recovered, and the actual charge rate calculation means finds the actual charge rate of the coal charged into the carbonizing chambers by calculating a coal charge rate of the each of the coal charge vehicle hoppers based on a difference between the amount of the received coal and the amount of the remaining coal measured by the first load cell, totalizing each of the calculated coal charge rates according to a number of the coal charge vehicle hoppers, and subtracting a coal return rate calculated based on measurement by the second load cell 21i from the totalized coal charge rate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a charging amount measuring apparatus and a charging amount measuring method for measuring a charging amount of coke oven charging coal for each carbonization chamber.

  The coke oven has a structure in which a large number of coking chambers sandwiched between combustion chambers are arranged side by side. Coal for iron making is manufactured by charging coal into each of the coking chambers and dry distillation.

  When charging coal in the coke oven, a coal-mounted vehicle having 4 to 5 hoppers mounted in series is first run to the lower side of the coal bin, and coal is received from the coal bin. Next, the coal-loaded vehicle that has received the coal is run to the carbonization chamber to be charged, and the coal is charged through the charging hole at the top of the carbonization chamber furnace.

  Coal charged in the carbonization chamber accumulates in a mountain shape as it is and blocks the generated gas passage, so leveling the coal top surface by putting a leveler in and out of the carbonization chamber is a leveling operation. Is done. Thereby, the passage of the generated gas is secured, and the carbonization chamber is efficiently filled with coal.

  In the leveling operation by the leveler, when the leveler is pulled back to the extruder side, the coal is discharged to the outside of the carbonization chamber along with the leveler, and so-called return coal is generated. The return charcoal is collected and returned to the colebin.

  In addition, the coal charged in the carbonization chamber and leveled on the top surface becomes coke for iron making through the carbonization process, but the coal charge greatly affects the coke production, so the coal charge is accurately measured. Various measurement methods have been proposed.

For example, in the mounting amount measuring system for coke oven charging described in Patent Document 1, the amount of coal received and the amount of residual coal are weighed by a hopper scale individually installed in the hopper of the coal-coating vehicle, and the coke is first calculated from the difference. Obtain the amount of coal charged into each furnace carbonization chamber, then weigh the returned coal with a belt scale installed on the return coal belt conveyor, and finally subtract the amount of returned coal from the amount of coal charged. The amount of mounting for each carbonization chamber is required.
JP-A-62-584

  However, in the conventional method for measuring the amount of charged coal, a return charcoal belt conveyor is laid in front of the coke oven and the belt is installed on one of the return charcoal belt conveyors. Since the weight of the returned coal is continuously measured and integrated, depending on the timing of cutting, the return coal generated in one carbonization chamber and the return coal generated in another carbonization chamber may be measured simultaneously. When the return charcoal falls from the conveyor, the weight of return charcoal that is less than the actual may be measured, and the actual return coal quantity in each carbonization chamber cannot be accurately grasped There was an inconvenience that there was.

  The present invention has been made in consideration of the problems in the conventional charging amount measurement method of charging coal as described above, and can accurately grasp the mounting amount for each carbonization chamber without being affected by the operating conditions. The present invention provides a charging amount measuring device and a charging amount measuring method for a coke oven charging coal.

  The apparatus for measuring the amount of coke oven charging coal according to the present invention includes a charcoal vehicle having a number of charcoal hoppers corresponding to the charging holes of the carbonizing chamber, and a charcoal chamber charged with coal. In the charging amount measuring device for measuring the charging amount of the charged coal with respect to the coke oven having an extruder provided with a leveler for leveling the top of the charged coal, it is provided in each loaded vehicle hopper of the loaded vehicle, A first weighing means for weighing the amount of coal received and the amount of remaining coal in the coal hopper, a recovery hopper for recovering return coal discharged from the furnace accompanying the leveler during operation of the leveler, and a recovery hopper A second weighing means for weighing the recovered return coal provided, and calculating the amount of coal charged for each charcoal hopper from the difference between the amount of coal received and the amount of residual coal measured by the first weighing means; The calculated amount of each charge is totaled by the number of coal hoppers, and further It is provided with an installed amount calculation means for obtaining an installed amount of coal charged into the carbonization chamber by subtracting the return coal amount measured by the second weighing means from the total charged coal amount. The gist.

  According to the present invention, when coal is received by the charcoal hopper, the amount of coal received is measured by the first weighing means, and after the coal in the charcoal hopper is charged into the carbonization chamber, the first weighing means The amount of remaining coal is measured by When the top of the coal charged into the coal chamber is leveled by the leveler and the returned coal is discharged out of the furnace, the discharged return coal is collected in the recovery hopper, and the return coal amount is measured by the second weighing means. The The installed charge calculation means obtains the amount of coal charged into the carbonization chamber from the difference between the amount of coal received and the amount of residual coal, and subtracts the return coal amount from the amount of coal charged, thereby charging the carbonization chamber. Calculate the amount of coal that has been put in.

  In the present invention, if the recovery hopper is provided in an extruder for coke extrusion, return coal can be recovered using an existing apparatus.

  In the present invention, as the first weighing means, it is preferable to provide a load cell between the charcoal vehicle hopper and a frame on the charcoal vehicle that supports the charcoal vehicle hopper.

  In the present invention, it is preferable that a load cell is provided between the collection hopper and a support frame that supports the collection hopper as the second weighing means.

  In the present invention, it is preferable that an opening / closing device that closes when returning coal is recovered and opens after the weighing is completed is provided below the recovery hopper.

  The method for measuring the amount of charging of the coke oven charging coal according to the present invention includes a charcoal vehicle having a number of charcoal vehicle hoppers corresponding to the charging holes of the carbonizing chamber, and charging the coal from the charging hole, In the charging amount measurement method for measuring the amount of charged coal in a coke oven having an extruder equipped with a leveler for leveling the top of the charged coal, it is charged for each loaded hopper of the loaded vehicle. Calculate the total amount of coal charged into the carbonization chamber by calculating the amount of coal input, and collect the return coal discharged outside the furnace along with the leveler during the operation of the leveler. The gist is to determine the amount of coal loaded in the carbonization chamber by weighing the amount of returned coal and subtracting the amount of returned coal from the total amount of coal charged.

  According to the present invention, there is an advantage that the mounting amount for each carbonization chamber can be accurately grasped without being affected by the operation conditions.

  Thus, by being able to grasp the amount of mounting into the carbonization chamber, for example, the fuel gas is not excessively supplied to the combustion chamber corresponding to the carbonization chamber having a small amount of mounting, and as a result, the heat required for dry distillation is reduced. It can also be reduced.

  Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

  FIG. 1 shows a schematic configuration of a coke oven body to which the present invention is applied.

  In the figure, a coke oven 1 has a carbonization chamber 2 into which coal is charged and a combustion chamber (not shown) for heating the carbonization chamber 2 arranged alternately in the furnace width direction to form one furnace. Yes.

  A heat storage chamber (not shown) is provided below the combustion chamber, and fuel gas and air are introduced into the combustion chamber through the heat storage chamber.

  The coal charged in the carbonization chamber 2 is pushed out of the coke oven from the coke side (C / S) on the opposite side by the extruder 3 from the extrusion side (P / S) after the end of dry distillation.

  Ascending pipes 4 are respectively arranged on the upper portions of the carbonization chambers 2, and the ascending pipes 4 are connected to a collecting main pipe 5 so as to be gathered, and coke oven gas (COG) generated during dry distillation. Is recovered.

  A plurality of charging holes 6 for charging coal are arranged in the upper part of each carbonization chamber 2 in the furnace length direction.

  Further, a coal bin 7 for storing raw coal is provided above the coke oven 1, and the discharge part 7 a of the coal bin 7 and the carbonization chamber 2 are connected, and the coal stored in the coal bin 7 is transferred to the carbonization chamber 2. The charcoal vehicle 8 travels on the track 9 for charging.

  The charcoal vehicle 8 is configured to charge coal through a charging hole 6 provided in the upper portion of the carbonization chamber 2, and includes a number of charcoal vehicle hoppers 8 a corresponding to the number of charging holes 6. Yes.

  In the figure, reference numeral 10 denotes a leveler that smoothes and flattens the upper surface (see the dashed line a shown by a two-dot chain line) of the raw coal charged through the charging hole 6, and 11 denotes an extruder. 3 is a guide car that guides coke pushed out from the carbonization chamber 2 by a bucket car (not shown).

  FIG. 2 is an enlarged view of the coal hopper 8a portion of the charcoal vehicle.

  In the figure, the charcoal hopper 8 a is supported by a frame 8 b of the charcoal vehicle 8. Specifically, four brackets 8c are arranged at equal intervals on the peripheral wall of the tubular charcoal hopper 8a, and each bracket 8c is fixed on a flange-shaped ring portion 8d.

  The ring portion 8d is supported by a gantry 8f fixed on the frame 8b via four load cells 8e as first weighing means.

  Each load cell 8e is arranged at equal intervals along the ring portion 8d, and detects the weight of the coal stored in the coal trolley hopper 8a. These load cells 8e are configured to weigh the amount of coal received and the amount of remaining coal, and the weighing signal is sent to the data processing device 12 described later.

  In addition, in the figure, c represents the coal receiving level, and c ′ represents the remaining coal level.

  A lower part of the charcoal vehicle hopper 8a is provided with a motor 8g and a table feeder 8i that is driven via a speed reducer 8h connected to the output shaft of the motor 8g. By rotating the table feeder 8i, The coal in the coal hopper 8a is charged into the carbonizing chamber 2 from the charging hole 6 of the coke oven through the chute 8h.

  3A and 3B are cross-sectional views of the furnace lid of the coke oven 1, wherein FIG. 3A is a side view and FIG. 3B is a front view.

  In these drawings, the furnace lid 20 has a vertically long fireproof structure in which a refractory brick 20a is lined on the inner side of the furnace, and a rod 20b is provided on the outer side of the furnace.

  An insertion port 20c for inserting the leveler 10 is positioned above the flange 20b, and a push lid 20d for opening and closing the insertion port 20c is provided.

  FIG. 4 shows the structure of the leveler 10 inserted into the carbonization chamber 2 through the insertion port 20c and the recovery hopper 21. FIG. 4 (a) is a front view and FIG. 4 (b) is a side view thereof. Is shown.

  In both figures, the leveler 10 is inserted from the insertion port 20c, and the returned charcoal generated in the leveling process is collected and weighed by the collection hopper 21 mounted on the extruder 3.

  The recovery hopper 21 has an upper hopper 21a and a lower hopper 21b that receive return charcoal, and a calibration hopper 21c is interposed between the hoppers 21a and 21b. However, a slight gap S is secured between the calibration hopper 21c and the lower hopper 21b.

  The lower opening of the calibration hopper 21c can be opened and closed by a slide gate 21e that advances and retreats in the horizontal direction (arrow d direction) by expanding and contracting the rod 21d 'of the hydraulic cylinder 21d. The hydraulic cylinder 21d and the slide gate 21e function as an opening / closing device.

  The calibration hopper 21c is supported from the upper hopper 21a. Specifically, brackets 21f and 21f are provided outwardly in the width direction (X direction) of the calibration hopper 21c at the upper edge of the calibration hopper 21c, while the side walls of the upper hopper 21a are provided inward. A pair of support frames 21g and 21g having a U-shape are provided.

  Plates 21h and 21h are provided below the support frames 21g and 21g so as to face each other in the width direction, and the brackets are mounted on the plates 21h and 21h via a load cell 21i as second weighing means. 21f and 21f are supported.

  With the above configuration, when the return coal is put into the calibration hopper 21c with the slide gate 21e closed, the return coal amount can be weighed.

  In the figure, 21j and 21j are steady rests.

  The weighing signal output from the load cell 8e provided in the coal hopper 8a of the charcoal vehicle 8 described above and the return coal weighing signal output from the load cell 21i of the calibration hopper 21c described above are data as the mounted input calculating means. It is sent to the processing device 12.

  Next, operation | movement of the charging amount measuring apparatus which has the said structure is demonstrated.

  When starting measurement, the slide gate 21e of the calibration hopper 21c is closed.

  In FIG. 1, when coal is supplied from the coal bottle 7 to each coal hopper 8a of the coal trolley 8 and the coal receiving is finished, the coal receiving weight is weighed by a load cell 8e (see FIG. 2) provided in the coal hopper 8a, The coal weight signal output from the load cell 8e provided in each coal hopper 8a is sent to the data processing device 12.

  The data processing device 12 sums the coal receiving weight signals sent from the load cells 8e of the coal hoppers 8a for the number of coal hoppers 8a (for the present embodiment, five units), thereby receiving the coal receiving weight for each coking chamber. Is stored in a work buffer (not shown).

  Next, the charcoal vehicle 8 travels on the track 9 and stops above the carbonization chamber 2 to be charged.

  When coal is charged from the coal hoppers 8a of the coal-loaded vehicles 8 through the charging holes 6 of the carbonizing chamber 2, and when charging is completed, the weight of the remaining coal is again weighed by the plurality of load cells 8e and output from the load cells 8e. The remaining charcoal weight signal is sent to the data processing device 12, and the remaining charcoal weight of the carbonization chamber is calculated and stored in the work buffer.

  Next, coal is charged into the carbonization chamber 2, the leveler 10 is inserted from the insertion port 20 c (see FIG. 3), and the coal upper surface is leveled by performing a leveling operation.

  In this leveling operation, as the leveler 10 is pulled back to the extruder 3 side, the return coal is discharged out of the furnace, and this return coal is recovered in the recovery hopper 21 (see FIG. 4).

  The collected return charcoal is weighed by the load cell 21 i of the calibration hopper 21 c and sent to the data processing device 12.

  When the return charcoal is weighed, the slide gate 21e is opened, and returned to the colebin 7 via the belt conveyor that receives the return charcoal.

  The data processing device 12 reads the coal receiving weight and the remaining coal weight in the work buffer, obtains the coal charging amount charged into the carbonization chamber 2 from the difference between the coal receiving weight and the remaining coal weight, and the coal charging amount. Further, by subtracting the amount of returned coal, the amount of coal loaded in the carbonizing chamber 2 is obtained. In this way, the amount of coal charge can be accurately grasped for each carbonization chamber.

  In an aging coke oven, the volume of each carbonizing chamber varies depending on the deformation, displacement, damage, adhesion of carbon, etc., and the charging amount per carbonizing chamber also varies. If the coal is excessively charged into such a carbonization chamber, the gas passage (crown space) in the carbonization chamber is lost and the inside of the furnace is compressed, causing gas leakage. On the other hand, if the charging amount is small, the ceiling carbon tends to adhere, which may lead to coal charging troubles and the like. Therefore, it is very important to control the charging amount in the carbonization chamber.

  On the other hand, in this embodiment, since the charging amount can be accurately grasped for each carbonization chamber, it is possible to prevent the above-described trouble from occurring.

It is a schematic block diagram of the coke oven main body to which the charging amount measuring apparatus according to the present invention is applied. It is an enlarged view which has a partial notch which shows the structure of the charcoal vehicle hopper part shown in FIG. It is sectional drawing of the furnace cover of a coke oven. (a) is a front view which shows the structure of a collection | recovery hopper, (b) is the side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coke oven 2 Coking chamber 3 Extruder 4 Rising pipe 5 Collecting main pipe 6 Charging hole 7 Coalbin 8 Charcoal car 8a Charcoal car hopper 9 Track 10 Leveler 11 Guide car 12 Data processor 20 Furnace 21 Recovery hoppers 21a, 21b Hopper 21c Calibration hopper 21d Hydraulic cylinder 21e Slide gate 21f Bracket 21g Support frame 21h Plate 21i Load cell

Claims (6)

A coal trolley equipped with a number of coal hoppers corresponding to the charging holes of the carbonization chamber, and a leveler for leveling the top of the coal charged into the carbonization chamber are installed. In a charging amount measuring apparatus for measuring the charging amount of charging coal for a coke oven having an extruder,
A first weighing means that is provided in each coal hopper of the charcoal vehicle and weighs the amount of coal received and the amount of residual coal in the coal hopper;
A recovery hopper for recovering return coal discharged outside the furnace accompanying the leveler during operation of the leveler;
A second weighing means provided in the collection hopper and weighing the collected return charcoal;
From the difference between the amount of coal received and the amount of residual coal measured by the first weighing means, the amount of coal charged for each coal hopper is calculated, and the calculated amount of coal charged is equal to the number of coal hoppers. Mounted amount calculation means for calculating the amount of coal charged in the carbonization chamber by adding and subtracting the amount of return coal measured by the second weighing means from the total amount of charged coal A coke oven charging coal charging amount measuring apparatus characterized by comprising:   The apparatus for measuring a charging amount of a coke oven charging coal according to claim 1, wherein the recovery hopper is provided in an extruder for coke extrusion.   The coke oven charging coal charging according to claim 1 or 2, wherein a load cell is provided as the first weighing means between the charcoal hopper and a mount on the charcoal vehicle supporting the charcoal hopper. Quantity measuring device.   The charging of the coke oven charging coal according to any one of claims 1 to 3, wherein a load cell is provided between the recovery hopper and a support frame that supports the recovery hopper as the second weighing means. Quantity measuring device.   The charging amount of the coke oven charging coal according to any one of claims 1 to 4, wherein an opening / closing device is provided at a lower portion of the recovery hopper, which is closed when returning coal is recovered and is opened after weighing is completed. measuring device. A coal trolley equipped with a number of coal hoppers corresponding to the charging holes of the carbonization chamber, and a leveler for leveling the top of the coal charged into the carbonization chamber are installed. In the charging amount measuring method for measuring the charging amount of the charging coal for the coke oven having an extruder,
Calculate the total amount of coal charged in the carbonization chamber by calculating and totaling the amount of coal charged for each coal hopper of the coal vehicle,
Collecting the return coal discharged outside the furnace accompanying the leveler during the operation of the leveler, weighing the recovered return coal amount,
A method for measuring a charging amount of a coke oven charging coal, wherein a mounting charging amount of coal charged in the carbonization chamber is obtained by subtracting the return coal amount from the total charging coal amount.

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