JPH0940966A - Method for preventing deposition of carbon on ceiling of coking chamber of coke oven and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for preventing the deposition of carbon, resulting from the deposition of a coal powder fluctuating during coal charge, on the ceiling of a coking chamber of a coke oven. SOLUTION: After coal 27 is charged from a charging car 26 through an inlet 4 into a coking chamber 1, the body 22a of a leveler 22 is inserted into the chamber 1 to level the height of the coal. Because the body 22a is provided with a gas blow pipe 23, the pipe 23 is operated to jet a gas toward the ceiling of the chamber. The coal powder 27a deposited on the ceiling of the chamber during coal charge is not yet coked, it can be easily separated from a ceiling 1a. Most of the separated coal powder 27a passes the exhaustion passage of a charging car mounted on the top of the chamber from an inlet 4 and is actively sucked and discharged from a fixed duct 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for preventing carbon from adhering to the ceiling of a coke oven carbonization chamber.

[0002]

2. Description of the Related Art Coke oven carbonization chamber (hereinafter referred to as carbonization chamber)
In this case, adhered carbon is generated by pyrolysis of the gas produced by carbonization or by the fine coal powder scattered at the time of charging the coal being fixed to the furnace wall portion of the carbonization chamber, particularly the ceiling portion, to form coke.

By growing on the wall surface of the furnace, the deposited carbon lowers the thermal conductivity of the furnace wall and also reduces the effective volume of the carbonization chamber, thus lowering the productivity.

Further, it becomes a cause of so-called kiln clogging in which coke cannot be extruded. Therefore, it is necessary to regularly remove this attached carbon.

On the other hand, however, this adhered carbon also has a function of blocking the joint breakage portion of the furnace wall brick and preventing gas leakage from the carbonization chamber to the combustion chamber, so that a thin uniform layer of carbon remains on the entire wall surface. Is said to be ideal.

By the way, in removing the adhered carbon, conventionally, a length 5 having a sharp tip from the charging port of the carbonization chamber is used.
Oxygen-containing gas such as air by using a ~ 6m spear-like jig to drop it off manually, or after the coke discharge is complete, open the top or side of the carbonization chamber and insert a jet nozzle Was used to burn off the adhering carbon. However, all of these methods are inefficient because they require human power and work under high heat. It was also difficult to leave an ideal thin uniform layer of carbon.

As a method for replacing the above human power, Japanese Patent Laid-Open No. 4-8
Japanese Patent No. 8082 discloses an apparatus for injecting an oxygen-containing gas from a charging port of a carbonization chamber to burn and remove carbon adhering to a furnace wall (Prior Reference 1).

The carbonization chamber carbon removing apparatus disclosed in the prior art document 1 uses a gas injection nozzle.
As shown in, the gas injection nozzle 10 is connected to the blower 8 of the coal car 6 mounted on the upper surface of the carbonization chamber 1 by the flexible tube 9. The gas injection nozzle 10 is charged into the inside of the carbonization chamber 1 from the charging port 4 through the exhaust passage 5.

The gas injected into the carbonization chamber 1 by the gas injection nozzle 10 comes into contact with the entire carbon deposited in the carbonization chamber. This gas burns the attached carbon 7. Carbon dioxide generated as combustion gas rises in the carbonization chamber 1 and is discharged from the charging port 4 through the exhaust passage 5 to the outside world.
The fixed duct 11 positively sucks and exhausts air.

In FIG. 2, reference numeral 2 is a furnace lid, and reference numeral 3 is an ascending pipe. Further, in Japanese Patent Laid-Open No. 195797/1993 (Prior Document 2), carbon attached to the furnace wall is removed by injecting an oxygen-containing gas into the furnace during coke extrusion from a nozzle provided in a rack beam of a coke oven extruder. Methods and devices for removal are disclosed.

[0011]

The technique disclosed in the prior art document 1 uses a gas blowing nozzle in place of the above-mentioned use of a spear-like jig by manpower, and eliminates manpower work under high heat. It is what makes me.

However, in general, the carbon deposited on the wall surface of the carbonization chamber has a non-uniform deposition thickness and has irregularities on the wall surface. Therefore, even if the oxygen-containing gas is injected into the carbonization chamber by using the gas injection nozzle, the attached carbon only burns to have an uneven surface, and a carbon layer having an uneven thickness remains. Therefore, it is difficult to leave a thin uniform layer of carbon on the entire wall surface in order to exert the sealing function of the joint portion of the furnace wall brick.

Further, when the adhered carbon is excessively burned, even if the protrusions of the adhered carbon become thin,
At the concave portion, the carbon adhering to the joint portion of the brick wall of the furnace wall is excessively burned and removed, which causes a gas leak.

In the technique disclosed in the prior art 2, the oxygen-containing gas is injected into the furnace at the same time as the coke is extruded to remove the carbon adhering to the furnace wall, so that it is necessary to provide a special time for the carbon removal work. However, it is difficult to leave a thin uniform layer of carbon on the entire wall surface as in the case of the technique of the prior art document 1.

Further, both of the techniques disclosed in the prior art 1 and the prior art 2 are intended to remove the adhered carbon after carbonization, and the adhered carbon becomes coke and the adhesion becomes strong. Therefore, there is a drawback that it takes time to remove.

The present invention is intended to solve the above-mentioned problems, and suppresses the adhesion of carbon, and further enables the adhered carbon to form a thin uniform layer over the entire wall surface of the coke oven carbonization chamber ceiling. An object of the present invention is to provide a method and an apparatus for preventing carbon from adhering to a part.

[0017]

According to a first aspect of the present invention, after the carbonization chamber of the coke oven is charged with carbon, a gas blow-out pipe having a nozzle is inserted into an upper space of the carbonization chamber, and a ceiling portion of the carbonization chamber is inserted. A method for preventing carbon from adhering to the ceiling of the coke oven carbonization chamber, characterized in that a gas is injected from the nozzle to remove the coal powder adhering to the carbon powder.

The present invention according to claim 2 is mounted on a leveler inserted into the coke oven carbonization chamber from the extruder side,
It is a device for preventing carbon from adhering to the ceiling of a coke oven carbonization chamber, which comprises a gas blow-out pipe provided with at least one nozzle.

The carbon adhering to the carbonization chamber has a non-uniform adhesion thickness, and is particularly thickly adhered to the ceiling portion including the periphery of the coal charging port of the carbonization chamber. Further, the adhered carbon is not the carbon that is particularly thickly and unevenly adhered to the ceiling of the carbonization chamber due to the thermal decomposition of the carbonization product gas, but is the carbon that is scattered during the charging of the coal into the carbonization chamber. Is.

In the present invention, after the coal is charged in the coke oven carbonization chamber, the gas is injected from the nozzle of the gas blowing pipe toward the coal powder adhering to the ceiling of the carbonization chamber. The powder is easily blown away from the ceiling of the carbonization chamber and dispersed, and most of the coal powder passes through the exhaust passage of the coal car from the charging port and is positively sucked and exhausted by the fixed duct.

On the other hand, since the adhered carbon produced by the thermal decomposition of the gas produced by the dry distillation is deposited and adhered from the gas, an adhered layer having a uniform thickness is formed on the furnace wall. Therefore, immediately after carbonization, if the coal powder that adheres to the ceiling of the carbonization chamber is blown away during carbonization, an adhered carbon layer ideal for sealing the brick joints of the furnace wall is formed in the entire carbonization chamber. Can be made.

Furthermore, in the present invention, as a suitable carbon adhesion preventing device used in the method for preventing carbon adhesion, attention is paid to a leveler inserted into the coke oven carbonization chamber from the extruder side in a normal carbonization operation, and the leveler is considered. The gas blow-out pipe having at least one nozzle is attached to the inside of the main body. As a result, when the leveler is inserted into the carbonization chamber to smooth the surface of the deposited coal after the carbonization in the coke oven carbonization chamber, gas is simultaneously ejected from the nozzle toward the coal powder adhering to the ceiling. Therefore, the time for the coal powder removal work is not needed again.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view showing an embodiment of the present invention. The same reference numerals are used for the portions overlapping the portions of FIG. 2 described above. Reference numeral 21 is a carbon adhesion preventing device of the present invention, in which a gas blow-out pipe 23 is attached to a leveler body 22a of the leveler 22. The leveler main body 22a is box-shaped and has an open upper surface, so that the gas blowing pipe 23 can be easily attached.

The gas blowing pipe 23 is composed of an air pipe 23b and an air nozzle 23a attached to the tip thereof. The compressor 2 outside the system from the other end of the air pipe 23b
Air is sent under pressure by 5 and can be jetted from the air nozzle 23a toward the ceiling portion 1a of the carbonization chamber 1.

The leveler 22 is an existing one that is normally used, and is used as a reinforcement 2 for the leveler main body 22a.
The air pipe 23b is fixed by using 2b.

A drive device is attached to the rear end of the leveler 22 so that the leveler 22 can be freely inserted into the carbonization chamber 1. A winch or the like is used as a drive device.

In the embodiment, the air nozzle 23a is the air pipe 2
Although it is attached to the tip portion of 3b, it is not limited to this, and it can be attached to a predetermined position of the air pipe 23b as necessary. The number of the air nozzles 23a is one or more as necessary.

The case where the carbon deposition prevention device shown in FIG. 1 is used to prevent carbon deposition in the carbonization chamber 1 will be described in detail. A coal car 26 is mounted on the upper part of the carbonization chamber 1, and coal 27 is charged into the carbonization chamber 1 through the carbonization port 4 of the carbonization chamber 1. When the charging of the coal 27 is completed, the coal car 23 is stopped at the same position, the drive device 24 is operated, the leveler 22 is inserted into the carbonization chamber 1 and is moved forward and backward, and the coal 27 is charged.
The unevenness of the surface of is leveled by the leveler body 22a. When the leveler main body 22a is advanced to the center of the carbonization chamber 1, the compressor 25 is operated to supply air to the air pipe 23b. Leveler main body 22a in a state where air is supplied
Is advanced to the back of the carbonization chamber, and then retracted to the insertion side of the leveler main body 22a of the carbonization chamber to stop the air supply.

The sent air is jetted from the air nozzle 23a toward the ceiling portion 1a of the carbonization chamber.

Before leveling by the leveler main body 22a, the level of coal is high, so that air injection causes severe coal scattering. For that purpose, the leveler main body 22a
Although air injection may be performed while the vehicle is moving backward, the start of air supply was performed from the vicinity of the central portion during forward movement, taking into consideration adjustment of air injection and the like. However, the start time of air supply is not particularly limited to this.

Coal dust 2 blown away by air injection
7a is sucked into the duct 11 through the exhaust passage 5 via the coal charging port 4 and removed.

Therefore, it is possible to prevent carbon from adhering due to the adherence of coal powder scattered during coal charging. On the other hand, regarding the carbon adhesion caused by the thermal decomposition of the gas produced by dry distillation, the growth of the carbon adhesion can be empirically predicted, and therefore, it is disclosed in advance in Reference 1 or Reference 2 before the carbon adhesion becomes thick. It is burnt and removed by such an oxygen-containing gas injection device. In this case, since the thickness of the deposited carbon layer is uniform, it is possible to form a predetermined thin deposited carbon layer by combustion.

[0033]

EXAMPLES Table 2 shows the results of carbon deposition prevention when the carbon deposition prevention apparatus of the present invention was used and 10 cycles of operations were performed in the carbonization chamber 1 under the conditions shown in Table 1.

[0034]

[Table 1]

[0035]

[Table 2]

As is apparent from Table 2, according to the present invention,
The amount of carbon adhering to the ascending pipe root portion 3a and the ceiling portions A, B, C, and D is drastically reduced, and they are thinly and uniformly attached.

In the case of the comparative example in which the carbon adhesion preventing device is not used, the carbon adhesion amount at the corresponding position is twice or more.

[0038]

Industrial Applicability As described above, according to the present invention, the adhesion of locally uneven carbon due to the adhesion of coal powder during carbonization is suppressed, and the adhered carbon becomes thin and uniform over the entire wall surface. You can Moreover, since the coal powder that has not yet been coked is removed immediately after the carbonization, it can be removed in a short time by a simple operation such as air blowing. Furthermore, it also has the effect that a simple device of attaching a gas blow-out pipe such as an air nozzle to the leveler body is sufficient.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a conventional carbon adhesion removing device.

[Explanation of symbols]

 21 Carbon Adhesion Prevention Device 22 Leveler Device 22a Leveler Main Body 23 Gas Blowing Pipe 23a Air Nozzle 23b Air Piping 24 Drive Device 25 Compressor 26 Coal Car 27 Coal 27a Coal Powder

Claims (2)

[Claims] 1. After charging a coke oven carbonization chamber, a gas blow-out pipe equipped with a nozzle is inserted into an upper space of the carbonization chamber, and a gas is injected from the nozzle to coal powder adhering to the carbonization chamber ceiling. A method for preventing carbon from adhering to the ceiling of the coke oven carbonization chamber, characterized in that 2. An apparatus for preventing carbon from adhering to the ceiling of a coke oven carbonization chamber, which comprises a gas blow-out pipe having at least one nozzle attached to a leveler inserted from the extruder side into the coke oven carbonization chamber. .