JPH09249882A - How to load coal into a chamber furnace type coke oven - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To push coke out of a furnace from a carbonization chamber without causing clogging due to collapse of coke cake. SOLUTION: A partition wall is provided in an upper coal tower 5 so as to correspond to one coal hopper 11A provided on a machine side where an extruder 7 is arranged among four coal hoppers 11 mounted on a coal car. 8 is provided for partitioning, and high-grade coal A for increasing coke strength is stored in the machine-side coal tower 5A from this partition wall 8 and normal-grade coal B is stored in the anti-machine-side coal tower 5B. To do. The high-quality coal A stored in the coal tower 5A is loaded into the coal hopper 11A on the machine side,
After accepting the normal-grade coal B stored in 5B into the other coal hoppers 11B on the anti-machine side, the coal car 10 travels above the carbonization chamber 6 in the carbonization order and is cut out from the coal hopper 11A. The high-quality coal A is charged in the machine side kiln of the carbonization chamber 6, and the normal-quality coal B cut out from the carbonization hopper 11B is charged in the anti-machine side of the carbonization chamber 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coal-charging vehicle which runs on a track laid on the upper surface of a chamber furnace type coke oven in which a plurality of carbonization chambers and combustion chambers are alternately arranged, and which runs in a direction crossing over each chamber. Arranged, installed a coal tower having a length equivalent to the furnace length of the carbonization chamber above the coal car, considering various factors such as the strength and manufacturing cost of the blended coal stored in the coal tower, that is, coke After accepting coal mixed with various coal brands (hereinafter, simply referred to as coal) into a plurality of coal hoppers mounted on the coal car, it is the order of the carburizing chamber to coalesce the car. Of the coal charging method to the chamber furnace type coke oven that moves upward and charges the coal cut out from the plurality of coal charging hoppers into the carbonization chamber from the charging hole provided in the upper part of the carbonization chamber It is about improvement.

[0002]

2. Description of the Related Art In a chamber furnace type coke oven, a heat storage chamber is arranged in a lower portion of a furnace body, and a carbonization chamber and a combustion chamber are alternately arranged in an upper portion of the furnace body. A plurality of charging holes are arranged in the longitudinal direction. The coal car runs on a track laid on the upper surface of the ceiling of this chamber furnace coke oven so that it runs across each chamber, and is located above the coal car to the furnace length of the carbonization chamber. A coal tower with a corresponding length is installed. After receiving the coal stored in the coal tower into a plurality of coal hoppers mounted on the coal car, the coal car is moved to the upper part of the coalizing chamber in the coaling order, and the coals cut out from the plurality of coal hoppers at the same time. Is charged through a charging hole provided in the ceiling of the carbonization chamber to form a charging coal layer in the carbonization chamber.

The charging coal layer thus formed in the carbonization chamber is subjected to dry distillation over 10 hours by indirect heating from both sides of the carbonization chamber through the furnace wall bricks from the adjacent combustion chamber to produce coke. It The coke cake that has been carbonized in the carbonization chamber is pressed by an extruder arranged on the machine side and discharged to the outside of the furnace on the opposite side of the machine. At this time, there is a case where coke is clogged in the carbonization chamber and cannot be extruded, and this is generally referred to as “clogged”. The occurrence of such clogging of coke not only causes a significant decrease in coke productivity, but in the worst case, damages the wall of the coke chamber and shortens the life of the coke oven. It has become one of the most serious problems in the operation of furnaces.

The first cause of the occurrence of clogging when the coke is extruded from the carbonization chamber by the extruder is insufficient clearance between the wall of the carbonization chamber and the coke. Since the clearance between the wall of the carbonization chamber and the coke depends on the shrinkage characteristics of the coke after resolidification, a method for ensuring the clearance is disclosed in JP-A-3-2730.
No. 91 gazette discloses a method of predicting shrinkage after dry distillation resolidification of blended coal from coal degree parameter of blended coal, elapsed time after resolidification, and blended coal bulk density at the time of charging. . Further, JP-A-5-339580 discloses a method of measuring burnout in the vertical or horizontal direction of coke after re-solidification in a test coke oven, and performing coal mixture management so that the burnout rate becomes a certain value or more. Is disclosed.

However, the method disclosed in the above publication is not sufficient to prevent the coke from being clogged in the carbonization chamber, and in the actual operation of the chamber furnace type coke oven, the coke chamber wall surface and the coke are Even if there is sufficient clearance, there may be a case where it is clogged.
The cause of this is that when the coke cake is extruded from the carbonization chamber by the extruder, the coke cake collapses. During coke extrusion, it is when the extruder ram strikes the coke cake that the coke cake is most extruded. The coke existing in the kiln mouth of the carbonization chamber has a lower carbonization temperature and lower strength than the coke existing in the center of the furnace.Therefore, when the extruder ram collides with the coke surface in the kiln mouth, the amount of collapse is reduced. As a result, the coke cake collapses and clogs occur.

In order to eliminate the coke quality deviation in the length direction of the carbonization chamber, a temperature detector is installed in the ram of the coke extruder in Japanese Patent Publication No. 60-32665, and the wall of the carbonization chamber is utilized by utilizing the movement of the ram. There is also a method for improving the temperature distribution by controlling the amount of fuel gas supplied to the combustion chamber or the amount of heat generated by the fuel gas based on the calculated average temperature difference.
Japanese Patent Laid-Open No. 57-123284 discloses a method in which coal is dropped in the furnace length direction using a charge distributor having a relatively narrow top and expanding downward just below the charging hole of the carbonization chamber. -267395
Japanese Patent Publication discloses a method of reducing the water content of coal charged in the kiln mouth of a carbonization chamber.

However, as described above, the temperature distribution on the wall of the carbonization chamber is measured to control the amount of fuel gas supplied to the combustion chamber or the amount of heat generated by the fuel gas, or a charge distributor having a narrow top and downward expansion. Coke quality deviation in the furnace length direction of the carbonization chamber, especially in the carbonization chamber, can be obtained by simply charging the coal into the carbonization chamber from the charging hole or reducing the water content of the coal charged in the kiln mouth of the carbonization chamber. It was not sufficient to improve the strength of the coke which was carbonized at the kiln mouth.

[0008]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, in which coal is charged into a carbonization chamber of a chamber furnace type coke oven through a charging hole and is formed in the carbonization chamber. When the coke is extruded from the carbonization chamber by using an extruder after the carbon layer is carbonized, the coke cake can be extruded smoothly by preventing the coke cake from collapsing when the extrusion ram collides. It is intended to provide a method for charging coal into

[0009]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a chamber furnace type coke oven in which a large number of carbonization chambers and combustion chambers are alternately arranged. Arrange a coal car that travels back and forth across the coal car, above the coal car, install a coal tower having a length corresponding to the furnace length of the carbonization chamber, the coal stored in the coal tower, After receiving the coal in the plurality of coal hoppers mounted in the coal car, the coal car is moved to above the coalizing chamber in the coaling order, and the coal cut out from the plurality of coal hoppers is coalized in the coalizing chamber. In a method for charging coal into a room furnace type coke oven which is designed to be charged into a room through a plurality of charging holes provided in a ceiling part of the coke, among the plurality of coal charging hoppers mounted on the coal car. In one coal hopper provided on the machine side where the extruder is placed Correspondingly, a partition wall is installed in the upper coal tower to partition, and high-grade coal that increases coke strength is stored in the coal tower on the machine side from this partition while it is stored in the coal tower on the anti-machine side. Normal-grade coal is stored, and high-grade coal stored in the machine-side coal tower from the partition wall is received in the machine-side coal hopper, while it is stored in the anti-machine-side coal tower. After accepting the normal-grade coal, which has been processed, into the other carburizing hopper on the anti-machine side, the coal-carrying car is run above the carburizing chamber in the carburizing order, and the high-grade coal cut out from the carburizing hopper on the machine side is used. Is charged into the kiln mouth of the machine side of the carbonization chamber, and the normal-grade coal cut out from the other charging hopper on the anti-machine side is charged into the anti-machine side of the carbonization chamber to A coal charging method for a chamber furnace type coke oven characterized in that a high-quality coal-charging layer is formed at the machine-side kiln port inside and a normal-grade charging coal layer is formed at the anti-machine side. is there.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic vertical cross-sectional view showing the entire chamber furnace type coke oven according to the present invention. According to the present invention, as shown in FIG. 1, a heat storage chamber 17 is arranged in the lower part of the furnace body of the chamber furnace type coke oven 1, and a carbonization chamber 6 and a combustion chamber (not shown) are alternately arranged in the upper part of the furnace body. (4 in the drawing) charging holes in the furnace length direction of the ceiling part that configures each carbonization chamber 6
13 is provided. Further, a coal car 10 is arranged which runs on a track 18 laid on the upper surface of the chamber furnace type coke oven in a direction that horizontally traverses above each of the carbonization chambers 6 (a direction perpendicular to the paper surface). Further, the coal tower 5 is installed above the coal car 10 and the length of the coal tower 5 is the length corresponding to the furnace length of the carbonization chamber 6.

The coal tower 5 is not partitioned without a partition wall in the furnace length direction of the carbonization chamber 6, that is, from the machine side where the extruder 7 is arranged to the counter machine side where the coke guide wheel 15 is arranged. . On the other hand, in the present invention, one of the plurality (four in the drawing) of the coal hoppers 11 mounted on the coal car 10 is located on the machine side where the coke extruder 7 is arranged with respect to the carbonization chamber 6. A partition wall 8 is provided in the coal tower 5 so as to correspond to the coal charging hopper 11A.
By partitioning the inside of the coal tower 5, a coal tower 5A on the machine side and a coal tower 5B on the anti-machine side are formed.

In the chamber furnace type coke oven 1, the coal carried by the belt conveyor 2 is transferred to the conveyor type distributor 4 via the central hopper 3 and further charged from the conveyor type distributor 4 into the coal tower 5. R. At this time, in the present invention, the coal tower 5A located on the machine side from the partition wall 8 of the coal tower 5
High-quality coal A that increases coke strength (for example, coal with high caking properties, coal with a binder such as pitch, or coal with a coke shrinkage agent is used) is charged and the partition is also used. Ordinary coal B is charged into the coal tower 5B located on the opposite side of the machine from the wall 8, and each is divided and stored in the coal tower 5. The high-quality coal A stored in the machine-side coal tower 5A from the partition wall 8 provided in the coal tower 5
By opening and closing the cutout gate 9 provided at the cutout opening 19, one of the coal-disposing hoppers 11 mounted on the coal-disposing car 10 is loaded into one of the coal-disposing hoppers 11A located on the machine side.
A coal tower located on the side opposite to the machine side from the cut wall 8
The normal coal B stored in 5B is opened by opening and closing the cutting gate 9 provided at the cutting opening 19, and the other three coal hoppers 11B mounted on the coal car 10 and located on the side opposite to the machine
To charge.

A coal car 10 in which predetermined coals A and B are dividedly loaded on a coal hopper 11 is moved on a track 18 from a position of a coal tower 5 to a position above a carbonization chamber 6 in the order of coal carburization. To do. At this time, since both sides of the carbonization chamber 6 are attached with removable furnace lids (not shown), the carbonization hoppers 11A located on the machine side are continuously cut out using the table feeder 12. The coal A is charged to the machine side of the carbonization chamber 6 through one charging hole 13 located on the machine side among the charging holes 13 arranged in the furnace length direction in the ceiling of the carbonization chamber 6. At the same time, the coal B cut out from each of the three charging hoppers 11B located on the opposite side of the machine using the table feeder 12 is replaced by the remaining three charging holes 13 arranged in the furnace length direction at the ceiling of the carbonization chamber 6. It is charged into the carbonization chamber 6 on the side opposite to the machine via. As a result, a coal-charging layer 6A made of high-quality coal A is formed at the machine-side kiln of the carbonization chamber 6, and a normal-quality coal-charging layer 6B is formed on the opposite side of the machine.

At the stage when coal charging into the carbonization chamber 6 is completed, 4
Since a small mound of charging coal is formed immediately below each charging hole 13, unevenness is generated in the furnace length direction of the carbonization chamber 6. Therefore, a leveler (not shown) is horizontally inserted in the furnace length direction of the carbonization chamber 6 to level the surfaces of the charging coal layers 6A and 6B having irregularities, and the surfaces are uniformly leveled by moving the levelers forward and backward. The charging coal layers 6A and 6B thus formed in the carbonization chamber 6 are heated by high-temperature heat transfer from the combustion chambers (not shown) arranged on both sides of the carbonization chamber 6 to about 17- It is carbonized over 24 hours. After the carbonization in the carbonization chamber 6 is completed, the furnace lids attached to both sides of the carbonization chamber 6 are removed, and then the coke 14 is removed from the coke 14 on the anti-machine side by the ram 7A provided in the extruder 7 on the machine side. It is discharged to the digestion vehicle 16 while being guided by the guide vehicle 15. Such an operation is sequentially repeated for each furnace group of the chamber furnace type coke oven 1 to produce the coke 14.

As described above, in the present invention, the partition wall 8 is provided in the coal tower 5, and the coal tower on the machine side of the partition wall 8 is located.
One coal hopper located on the machine side among the coal hoppers 11 mounted on the coal car 10 by forming 5A and an anti-machine side coal tower 5B and storing high-quality coal in the coal tower 5A. 11A is charged with high quality coal A. Therefore, high-quality coal A from the charging hopper 11A is transferred from one charging hole 13 located on the machine side among the four charging holes 13 provided in the ceiling of the carbonizing chamber 6 to the inside of the carbonizing chamber 6. Is charged into the carbonization chamber 6
It is possible to form a high-grade charging coal layer 6A at the kiln mouth on the machine side. On the other hand, on the opposite side of the carbonization chamber 6 from the machine side, a normal-quality charging coal layer 6B is formed. As a result, among the coke that has been carbonized in the carbonization chamber 6, the high-grade coal-charging layer 6A is present at the machine-side kiln mouth, so the coke in that part has a higher strength than the coke on the anti-machine side. There is.

Therefore, when the carbonization in the carbonization chamber 6 is completed, the furnace lids set on both sides of the carbonization chamber 6 are removed, and then the extruder 7 is inserted into the carbonization chamber 6 from the machine side.
The ram 7A provided at the tip is made to collide with the coke cake, pushed out from the machine side to the outside of the furnace on the machine side, and discharged to the digestion car 16 while being guided by the coke guide wheel 15.
At this time, the high-grade charging coal layer 6A existing at the kiln mouth on the machine side is strongly carbonized, and the strength of the coke cake is high, so collapse can be reduced even if it collides with the ram 7A. Therefore, the coke cake can be easily pushed out of the furnace without being clogged from the carbonization chamber 6.

In the coal tower 5 used in the actual operation of the chamber furnace type coke oven, four coal hoppers mounted on the coal car 10 are installed.
One of the 11 coal hoppers located on the machine side 11A
A partition wall 8 is provided in the coal tower 5 corresponding to the boundary between the one coal side hopper 11A on the machine side and the three coal hoppers 11B on the anti-machine side. 5A and anti-machine side coal tower 5B were formed. And coal A to be charged into the machine side coal tower 5A
Must be of a higher quality than the coal B charged into the anti-machine side coal tower 5B. Therefore, as the high-quality coal A, an experimental operation was carried out by using the normal-grade coal B charged in the coal tower 5B on the anti-machine side as a base, and adding 3% of pitch to the base.

In this way, the high-grade coal A obtained by adding 3% of pitch to the normal-grade coal B was loaded into the coal tower 5A, and the high-grade coal A was loaded from the coal tower 5A onto the coal car 10. Charge into one coal hopper 11A located on the machine side. On the other hand, the normal-grade coal B is loaded into the coal tower 5B, and the normal-grade coal B is loaded from the coal tower 5B into the three coal-loading hoppers 11B located on the anti-machine side of the coal-loading vehicle 10. . Further, high-quality coal A is charged into the machine-side kiln port of the carbonization chamber 6 from one coal-charging hopper 11 on the machine side to form a high-quality coal layer 6A in the carbonization chamber 6 and the anti-machine The normal-grade coal B is charged into the anti-machine side of the carbonization chamber 6 from the three side coal-charging hoppers 11B to form a normal-grade charge coal layer 6B on the anti-machine side of the carbonization chamber 6.

According to the present invention, a high-grade charging coal layer 6A is formed at the machine side kiln opening of the carbonizing chamber 6 and a normal-grade charging coal layer 6B is formed on the opposite side of the machine and the carbonization is carried out. We were able to obtain the results shown. Table 1 shows the operation results in the case of carbonization according to the present invention, for comparison, in the case where only the high-quality coal A is charged into the carbonization chamber 6 and the carbonization is carried out, and only the normal-grade coal B is charged in the carbonization. The operation results are compared and shown.

[0020]

[Table 1]

Regarding the tumbler strength TI ₆ ⁴⁰⁰ of the coke, when only coal A which has been graded by adding 3% of pitch to normal grade coal is charged into the carbonizing chamber 6 and carbonized, the carbonizing chamber 6 The tumbler strength TI ₆ ⁴⁰⁰ was increased by 1.2 due to the improvement in the quality by the addition of pitch, as compared with the case where only the normal-quality coal B was charged into and the carbon was distilled. When the high-grade coal A and the normal-grade coal B are separately charged into the carbonization chamber 6 of the present invention, the tumbler strength TI ₆ ⁴ is larger than that in the case where only the normal-grade coal B is charged and carbonized. ⁰⁰ is 0.4
Increased.

The coke cake extrudability in the carbonization chamber 6 was evaluated based on the current value of the electric motor driving the extruder 7. When the extruder 7 extrudes the coke that has been carbonized from the carbonization chamber 6, if the current value exceeds a certain reference value, the electric motor that drives the extruder 7 automatically stops and becomes stuck. Therefore, the current value serving as a standard for this automatic stop was set as the extrusion current upper limit value, and the coke extrudability was evaluated by the ratio of this to the extrusion current value, that is, (extrusion load factor = extrusion current value / extrusion current upper limit value). When only the normal grade coal B was charged into the carbonization chamber 6, the coke extrusion load factor was as high as 0.74, but the high grade coal A and the normal grade coal B were divided into the carbonization chamber 6 of the present invention. When charged, the coke extrusion load factor was significantly reduced, and the coke extrusion load factor could be reduced to the same level as when only the high-quality coal A was charged into the carbonization chamber 6.

From the results shown in Table 1, as originally expected,
High-grade coal A is charged into the machine side kiln of the carbonization chamber 6, and normal-grade coal B is charged into the anti-machine side and carbonized to remove coke from the carbonization chamber 6 using the extruder 7. It was confirmed that the collapse of the coke cake due to the impact when the ram 7A collides with the coke cake during extrusion can be reduced, and the coke extrusion load can be reduced.

[0024]

As described above, according to the present invention, a high-grade charging coal layer capable of improving the coke strength is formed in the kiln opening of the machine side where the extruder is arranged with respect to the carbonization chamber, and the anti-machine side is formed. Since a normal-grade charging coal layer is formed and dry-distilled, the strength of the coke which has been dry-distilled in the carbonization chamber is greater in the coke existing in the machine side kiln port. Therefore, it is possible to prevent the coke from collapsing due to the impact when the ram of the extruder collides with the surface of the coke cake.

As a result, the occurrence of clogging when the coke in the carbonization chamber is extruded by the extruder is eliminated, and the coke can be smoothly extruded from the carbonization chamber. Therefore, damage to the furnace wall surface due to coke clogging in the carbonization chamber can be avoided, furnace wall repair cost can be reduced, stable operation of the chamber furnace type coke furnace can be achieved, and the life of the furnace can be extended, which is economical. The effect is enormous. In addition, high-quality high-cost coal is used only in the machine-side kiln of the carbonization chamber, and normal-grade coal is used on the anti-machine side. Therefore, overall cost increase of the coal can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view showing an entire chamber furnace type coke oven according to the present invention.

[Explanation of symbols]

 1-chamber furnace coke oven 2 Belt conveyor 3 Center hopper 4 Conveyor type distributor 5 Coal tower 6 Carbonization chamber 7 Extruder 8 Partition wall 9 Cutting gate 10 Coal car 11 Coal hopper 12 Table feeder 13 Charging hole 14 Coke 15 Coke guide car 16 Digestion car 17 Heat storage room 18 Orbit 19 Cut-out port A High-grade coal B Normal-grade coal

Claims (1)

[Claims] 1. A coal-charging vehicle that reciprocates so as to cross over each chamber on a track laid on the upper surface of a chamber furnace type coke oven in which a plurality of carbonization chambers and combustion chambers are alternately arranged. A coal tower having a length corresponding to the furnace length of the carbonization chamber is installed above the coal car, and the coal stored in the coal tower is received in a plurality of coal hoppers mounted on the coal car. ,
The coal car is moved above the carburizing chamber in the carburizing order, and the coal cut out from the plurality of carburizing hoppers is brought into the room through a plurality of charging holes provided in the ceiling of the carburizing chamber. In the method for charging a coal to a chamber furnace type coke oven, which is to be charged, one coal hopper provided on the side of a machine where a coke extruder is arranged among a plurality of coal hoppers mounted on the coal car. A partition wall is installed in the upper coal tower to correspond to the above, and high-grade coal that increases coke strength is stored in the coal tower on the machine side from this partition wall, while inside the coal tower on the anti-machine side. The normal-grade coal is stored in, and the high-grade coal stored in the machine-side coal tower from the partition wall is received in the coal hopper located on the machine side, while in the coal tower located on the anti-machine side. Stored After accepting normal grade coal into another coal hopper on the anti-machine side, the coal car was run above the coalizing chamber in the carburizing order, and the high quality coal cut out from the carburizing hopper on the machine side was removed. By loading the coal into the machine side kiln of the carbonization chamber and charging normal-grade coal cut out from another coal hopper on the anti-machine side into the anti-machine side of the carbonization chamber, A method for charging coal into a chamber-type coke oven, characterized in that a high-grade coal bed is formed at the kiln opening and a normal-grade coal layer is formed on the opposite side of the machine.