JP6098032B2 - Leveler control device and leveler control method - Google Patents

Description

  The present invention relates to a leveler control device and a leveler control method for controlling a leveler for leveling coal charged in a coking chamber in a coke oven.

  In the coke oven, carbonization chambers and combustion chambers are alternately arranged, and the carbonization chamber and the combustion chamber are partitioned by a partition wall of refractory bricks. In the coke oven, raw material coal is charged into the carbonization chamber from above by a hopper of a charging vehicle, and is subjected to dry distillation with the heat of the combustion chambers disposed on both sides of the carbonization chamber to generate coke. Coke produced by dry distillation is discharged from the carbonization chamber by the ram of the extruder.

  Generally, coal is charged from 4 to 5 charging holes provided in the upper part of the carbonization chamber. As a result, the top surface of the charged coal undulates in a valley shape that is high just below the charging holes of the carbonization chamber and low between the charging holes. The coal undulations need to be flattened to reduce coke productivity. For this reason, a rod-like leveler provided in the extruder is inserted horizontally into the carbonization chamber from the insertion port provided at the top of the furnace lid (extruder side furnace lid) that closes the side of the carbonization chamber, The top surface is leveled smoothly. Normally, the leveler is inserted from the insertion port to the vicinity of the opposing surface (extruder-opposed furnace lid), and then pulled back to the vicinity of the insertion port. By repeating the reciprocating motion of the leveler forward (insertion) and backward (retraction) a plurality of times, the coal is leveled.

  Here, the leveler always passes in the vicinity of the insertion port on the side of the carbonization chamber every time the reciprocating motion is performed, whereas the vicinity of the opposing surface of the insertion port on the side of the carbonization chamber (extruder facing furnace cover) Since the leveler does not always pass, the coal cannot be leveled sufficiently and the top surface of the coal tends to be low. The volume of the space in the vicinity of the upper portion of the extruder facing furnace cover that is exposed when the top surface of the coal is lowered usually occupies 5 to 6% of the volume of the carbonization chamber. This space not filled with coal not only reduces the productivity of coke, but also causes a problem that the coal is heated while being empty in the upper portion of the exposed counter-facing furnace cover and is worn out.

  For this reason, for example, in Patent Document 1, the leveler is forcibly controlled to the stop position just before the extruder facing furnace lid without stopping while the leveler is inserted into the carbonization chamber, and the stop position is always set. There is a description of what keeps the coal charged in the carbonization chamber constant.

JP-A 61-197684

  By the way, the thing of patent document 1 inserts a leveler to the fixed stop position just before an extruder facing furnace lid, without extending the operation time of coal charge, and the coal top surface of an extruder facing furnace lid upper part is It is possible to prevent lowering and the leveler from colliding with the extruder facing furnace lid, but the speed control of the leveler is forcibly performed in the entire section leading to the extruder facing furnace lid, so that the apparatus is complicated. There is a problem of becoming.

  Moreover, even if the leveler is speed controlled up to a certain stop position just before the above-mentioned extruder facing furnace cover, the shape of the valley in the carbonization chamber changes depending on the type of coal charged in the carbonization chamber, so that Can not be leveled sufficiently. For example, because the moisture content varies depending on the type of coal, the shape and leveling of the top surface of the coal charged into the carbonization chamber are different, and even if the speed control up to the fixed stop position described above is performed. In some cases, the leveler's reciprocating motion cannot level the coal sufficiently. In this case, it is necessary to increase the number of reciprocations of the leveler in order to sufficiently equalize the coal charged into the carbonization chamber. However, in order to increase the number of reciprocations of the leveler, the time required for the reciprocation of the leveler becomes longer, and the operation time for charging the coal into the carbonization chamber has to be extended, resulting in a decrease in coke productivity. There is a fear.

  The present invention has been made in view of the above, and provides a leveler control device and a leveler control method capable of efficiently leveling coal charged in a carbonization chamber within an operation time of coal charging. The purpose is to do.

  In order to solve the above-described problems and achieve the object, the leveler control device according to the present invention performs the operation of the leveler inserted into the carbonization chamber in order to level the coal charged in the carbonization chamber in the coke oven. A leveler control device for controlling, wherein at the start of insertion of the leveler, a leveler tip is pushed out from the leveler insertion position toward a predetermined stop position in the vicinity of the furnace lid facing the carbonization chamber, and at the end of insertion of the leveler, the leveler The front end is pulled back from the predetermined stop position toward the insertion position, and the leveler front end is placed between the predetermined stop position and the predetermined stop position between the start of the leveler insertion and the end of the leveler insertion. And a return position set between the insertion position and the insertion position are controlled to reciprocate a predetermined number of times.

  The leveler control device according to the present invention is characterized in that, in the above invention, a plurality of different positions are set as the folding position.

  The leveler control device according to the present invention is characterized in that, in the above-mentioned invention, the turn-back position and the predetermined number of times are changed depending on a type of charging coal and an operation time of charging coal.

  The leveler control method according to the present invention is a leveler control method for controlling the operation of a leveler inserted into the carbonization chamber in order to level the coal charged in the carbonization chamber in the coke oven, At the start of insertion, the leveler tip is pushed from the leveler insertion position toward a predetermined stop position in the vicinity of the coking chamber facing furnace lid, and at the end of the leveler insertion, the leveler tip is moved from the predetermined stop position to the insertion position. The leveler tip is turned back between the predetermined stop position and the predetermined stop position and the insertion position between the start of the leveler insertion and the end of the leveler insertion. Control is performed to reciprocate between positions a predetermined number of times.

  According to the present invention, there is provided a leveler control device for controlling an operation of a leveler inserted into the carbonization chamber in order to level the coal charged in the coking chamber in the coke oven, and at the start of the leveler insertion, Extruding the tip from the leveler insertion position toward a predetermined stop position in the vicinity of the coking chamber facing furnace lid, and when the leveler has been inserted, pulling the leveler tip from the predetermined stop position toward the insertion position, Between the start of leveler insertion and the end of insertion of the leveler, the leveler tip is placed between the predetermined stop position and a turn-back position set between the predetermined stop position and the insertion position. Because the reciprocating control is performed a predetermined number of times, the opposed furnace lid side of the carbonization chamber is sufficiently leveled, and the coal charged in the carbonization chamber is effective within the operation time of the coal charging. To flatten it can, it is possible to improve the coke productivity as the result.

FIG. 1 is a schematic diagram showing a schematic configuration of a coke oven. FIG. 2 is a diagram schematically showing the configuration of the leveler control device according to the embodiment of the present invention. FIG. 3 is a perspective view showing the structure of the leveler. FIG. 4 is an explanatory diagram showing the leveler control processing operation of the present embodiment. FIG. 5 is a flowchart showing the leveler control processing procedure of the present embodiment. FIG. 6 is an explanatory diagram showing a leveler control processing operation that is a modification of the present embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. Moreover, in description of drawing, the same code | symbol is attached | subjected and shown to the same part.

  FIG. 1 is a schematic diagram showing a schematic configuration of a coke oven. As shown in FIG. 1, in the coke oven 100, the carbonization chamber 2 and the combustion chamber 3 are alternately arranged, and the carbonization chamber 2 and the combustion chamber 3 are partitioned by a partition wall of refractory bricks. In the coke oven 100, raw material coal is charged into the carbonization chamber 2 from above by the hopper 5 of the charging vehicle 4, and dry-distilled with the heat of the combustion chambers 3 disposed on both sides of the carbonization chamber 2 to generate coke. . Coke produced by dry distillation is discharged from the carbonization chamber 2 by the ram 7 of the extruder 6.

  FIG. 2 is a diagram showing a schematic configuration of a leveler control device for leveling the charging coal in the carbonizing chamber 2. As shown in FIG. 2, the coal 8 is charged from 4 to 5 charging holes 21 provided in the upper part of the carbonizing chamber 2. Therefore, the top surface of the charged coal 8 undulates in a valley shape that is high just below the charging hole 21 of the carbonization chamber 2 and low between the charging holes 21. The leveler control device 1 allows the rod-like leveler 10 provided in the extruder 6 to be placed in the carbonizing chamber 2 from an insertion port 23 provided in the upper portion of the furnace lid (extruder side furnace lid 22) that closes the side portion of the carbonizing chamber 2. The coke productivity is improved by inserting it horizontally and smoothing the top surface of the coal 8.

  The leveler control device 1 includes a wire 11 connected to the tail end of the leveler 10, a drum 12 that winds the wire 11, an electric motor 13 that rotates the drum 12, and a rotation detector that detects the number of rotations of the electric motor 13. 14, a control unit 15, and a database 16.

  The control unit 15 is realized by using a memory that stores a processing program and the like and a CPU that executes the processing program. The control unit 15 executes a leveler control process that will be described later, and rotates the motor 13 based on the detection value of the rotation detector 14. The reciprocating motion of the leveler 10 is controlled by controlling. Under the control of the control unit 15, the leveler 10 is inserted from the insertion port 23 of the carbonization chamber 2 to a predetermined stop position in the vicinity of the facing surface (extruder facing side furnace cover 24), and then from the predetermined stop position to the insertion port 23 side. It is pulled back to the folding position and inserted again to the predetermined stop position. The coal 8 is leveled by repeating the reciprocating motion of the leveler 10 forward (insertion) to a predetermined stop position and retreating (retraction) to the return position a plurality of times.

  The database 16 stores charging coal specifications 16a and an operation schedule 16b. Charging coal specifications 16a is a type of coal including the amount of water and particle size in the coal. On the other hand, the operation schedule 16b stores the operation time for charging the coal, which is the time between the start of coke firing and the start of dry distillation. These pieces of information are used when the control unit 15 described above refers to control the operation of the leveler 10.

  As shown in FIG. 3, the leveler 10 has a configuration in which a plurality of scrapers 31 that are orthogonal to the stroke direction A are arranged. Therefore, when the leveler 10 is reciprocated once in the carbonization chamber, the coal on the extruder facing side furnace cover 24 side is less often leveled by the scraper 31 than the coal on the insertion port 23 side.

Here, with reference to FIG. 4, the outline | summary of the reciprocating motion operation | movement of the leveler 10 by the control part 15 is demonstrated. As shown in FIG. 4, first, the leveler 10 moves forward to a predetermined stop position P1 having a length (insertion length) L1 from the insertion port 23 (insertion position P0), and then, a turn-back position where the insertion length is L2. Retreat to P2, and then repeat the reciprocation between the predetermined stop position P1 and the turn-back position P2 a plurality of times, and return to the reciprocation start position P0 (position where the insertion length is 0). Here, the folding position P2 is provided between the insertion position P0 and the predetermined stop position P1, and the stroke between the folding position P2 and the predetermined stop position P1 is between the insertion position P0 and the predetermined stop position P1. Small compared to the stroke. Further, the predetermined stop position P1 is a position in the carbonization chamber immediately in front of the extruder facing side furnace lid 24. The number of reciprocating motions and the turn-back position P2 are determined so that the reciprocating motion by the leveler 10 is completed within the coal charging operation time ΔT. A plurality of folding positions P2 may be provided. Further, the leveler 10 may perform speed control up to a predetermined stop position P1 in the vicinity of the extruder facing side furnace lid 24, or at a constant speed up to a predetermined stop position P1 in the vicinity of the extruder facing side furnace cover 24 at a constant speed. The leveler may be controlled so as to be moved by inertia to a predetermined stop position P1.

  Next, the leveler control processing procedure by the control unit 15 will be described with reference to the flowchart of FIG. In the process of step S1, with the completion of coal charging as a trigger, the control unit 15 refers to the operation schedule 16b stored in the database 16 and calculates the operation time ΔT of coal charging. Thereby, the process of step S1 is completed and a leveler control process progresses to the process of step S2.

  In the process of step S <b> 2, the control unit 15 acquires the charging coal specifications 16 a stored in the database 16 and acquires the type of coal 8. Thereby, the process of step S2 is completed and a leveler control process progresses to the process of step S3.

  In the process of step S3, the control unit 15 calculates the turn-back position P2 and the number N of reciprocating motions based on the coal charging operation time ΔT and the type of coal. Here, a plurality of relations between the coal charging operation time ΔT, the type of coal, the combination of the turn-back position P2 and the number of reciprocations N are set in advance as operation patterns as shown in FIG. Depending on the operation time of the coal charging performed and the type of coal, an operation pattern combining the turn-back position P2 and the number N of reciprocating motions may be selected. Thereby, the process of step S3 is completed and a leveler control process progresses to the process of step S4.

  In the process of step S4, the control unit 15 controls the rotational drive of the electric motor 13 to reciprocate the leveler 10 based on the folding position P2 calculated in step S3 and the number N of reciprocating movements. The control unit 15 knows the number of rotations of the drum 12 from the number of rotations of the electric motor 13 detected by the rotation detector 14, so that the control unit 15 applies the leveler 10 to the carbonization chamber 2 based on the number of rotations detected by the rotation detector 14. Control the insertion length. Thereby, the process of step S4 is completed and a series of leveler control processes are complete | finished.

  As shown in FIG. 6, a plurality of folding positions P21 and P22 may be set. In this case, the coal leveling according to the type of coal can be finely and sufficiently performed.

  As described above, according to the leveler control device 1 of the present embodiment, the turn-back position P2 and the number N of reciprocating motions are calculated based on the coal charging operation time ΔT and the type of coal. Since the leveler 10 is controlled so as to have an operation pattern based on the combination of the turn-back position P2 and the number N of reciprocating movements, the charging coal can be efficiently leveled within the operation time ΔT of the coal charging, As a result, coke productivity can be improved.

  Further, the above embodiment is merely an example for carrying out the present invention, and the present invention is not limited to these, and various modifications according to specifications and the like are within the scope of the present invention. It is obvious from the above description that various other embodiments are possible within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Leveler control apparatus 2 Carbonization chamber 3 Combustion chamber 4 Charging vehicle 6 Extruder 8 Coal 10 Leveler 11 Wire 12 Drum 13 Electric motor 14 Rotation detector 15 Control part 16 Database 16a Charging coal specification 16b Operation schedule 21 Charging hole 22 Extruder side furnace lid 23 Insertion port 24 Extruder facing side furnace lid 100 Coke oven

Claims (3)

A leveler control device for controlling the operation of a leveler inserted into the carbonization chamber in order to level the coal charged in the carbonization chamber in the coke oven,
A database for storing the moisture content and particle size in the coal and the operation time of the coal charge;
Based on the moisture content and particle size in the coal stored in the database and the operation time of the coal charging, a plurality of different between the leveler insertion position and a predetermined stop position in the vicinity of the coking chamber facing furnace lid The return position and the number of reciprocations of the leveler between each of the predetermined stop position and the plurality of different return positions are calculated so that the reciprocation of the leveler is completed within the operation time of the coal charging. When the leveler starts to be inserted, the leveler is advanced from the insertion position to the predetermined stop position, and when the leveler has been inserted, the leveler is returned from the predetermined stop position to the insertion position, and the leveler starts to be inserted. Between the predetermined stop position and the plurality of different folding positions between the time and the end of insertion of the leveler. Number of times that the calculated, and a control unit for repeatedly reciprocating a plurality of times,
A leveler control device comprising: 2. The leveler control device according to claim 1, wherein the plurality of different folding positions and the number of reciprocating motions of the leveler are changed according to a moisture amount and a particle size in the coal and an operation time of the coal charging. A leveler control method for controlling the operation of a leveler inserted into the carbonization chamber in order to level the coal charged in the carbonization chamber in the coke oven,
A plurality of different folding positions between the insertion position of the leveler and a predetermined stop position in the vicinity of the facing furnace cover in the carbonization chamber based on the moisture content and particle size in the coal stored in the database and the operation time of the coal charging And calculating the number of reciprocating motions of the leveler between each of the predetermined stop position and the plurality of different folding positions so that the reciprocating motion of the leveler is completed within the operation time of the coal charging. When,
When the leveler starts to be inserted, the leveler is advanced from the insertion position to the predetermined stop position.At the end of the leveler insertion, the leveler is returned from the predetermined stop position to the insertion position. Reciprocating the leveler a plurality of times for the calculated number of times between each of the predetermined stop position and the plurality of different folding positions between the end of insertion of the leveler; and
The leveler control method characterized by including.

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