JP2002194360A - Method and device for removing carbon adhered to place near to ceiling of carbonization chamber of coke oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To burn off carbon adhered to places near to a ceiling portion and to the periphery of a charging port at a short time and in a concentrated state by inserting a lance for blowing out air into a narrow space and blowing outer air into the space at a high speed. SOLUTION: In a state that red heated coke 7 is left in a carbonization chamber, namely before the coke is pushed out after the carbonization, a lance 3 for blowing out air is inserted into a carbonization chamber top space 8 formed between the red heated coke 7 and the carbonization chamber top, and outer air is jetted at a high speed. Carbon adhered to a ceiling portion is burned off with the carbonization heat and oxygen in the blown air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing carbon adhering in a carbonization chamber of a coke oven.
In particular, the present invention relates to a method and an apparatus for removing carbon adhering near the ceiling of a carbonization chamber.

[0002]

2. Description of the Related Art Carbon adheres to a ceiling portion of a coke oven carbonization chamber and around a charging port during a coal carbonization process. Carbon adhering to the ceiling of the coking chamber and around the charging port makes it difficult to close and level the charging port (work to average the amount of coal charged into the coking chamber) if left unattended, and also to prevent coke clogging. It may cause coke oven operation. For that reason,
It is necessary to periodically remove attached carbon.

As a conventional method for removing the adhered carbon, there is a method in which a charging entrance lid is opened, and a jig having a sharp tip is used and manually dropped from the furnace. This method is a high-temperature heavy-strength labor operation in a bad environment (high temperature, dust, gas, etc.) of a coke oven, and the operation involves danger. A burn injury due to a flame blown out from the charging port is also realistically occurring, and there is a risk that even the film carbon necessary for protecting the brick joint seal in the coke oven is removed. The carbon near the ceiling becomes a blind spot when viewed from the shape of the furnace.

[0004] As a method of removing carbon adhering to a blind spot where removal is difficult, about 1 hour before extrusion, the charging inlet and the riser are released manually to introduce air into the furnace.
There is a prior art 1 in which carbon is removed by natural ventilation.

[0005] Further, as a prior art 2 described in Japanese Patent Application Laid-Open No. 61-231088, a lance is inserted into an empty carbonization chamber after the coke kiln is completely discharged, and high-speed air is blown out from a nozzle to burn and remove carbon. There is a method. FIG. 4 is a diagram illustrating the related art 2. In the figure, 1 is a carbonization chamber, 2 is an ascending pipe, 31 is a lance for blowing air, 4 is a charging inlet, 5 is a ceiling of the carbonization chamber, 6 is an air flow, 10 is air, 11 is a furnace lid on the extruder side, and 12 is Shows the guide car side furnace lid.

[0006] With the carbonization chamber 1 in an empty kiln (after completion of the extruding operation), the furnace lid 11 on the extruder (not shown) side and the furnace lid 12 on the guide wheel (not shown) are closed, and the coal loading car ( (Not shown)
Takes off the loading lid at the furnace top, inserts lances 3 (usually three) into the furnace and blows air 10 into the car.
Burn and remove the bon. The air blown by the air blowing lance 31 takes a path such as an air flow 6 shown by a dotted line, and passes through the rising pipe 2.

[0007]

The above-mentioned prior art system has the following problems. First, in the prior art 1, since the amount of air is small, it takes a long time to remove carbon, which adversely affects the operation rate of the coke oven (reduced coke production) and bricks in the oven.

Further, in the prior art 2, there is a problem that the convection air flow does not sufficiently reach the furnace top space portion due to the large space in the carbonization chamber, and the carbon adhering to the ceiling cannot be sufficiently removed. . That is, the airflow 6 does not sufficiently reach the portion indicated by the hatched portion in FIG. 4, and the carbon attached to this portion cannot be sufficiently removed.

An object of the present invention is to solve the above problems and to provide a method and an apparatus for removing carbon adhering to the vicinity of the ceiling of a coke oven carbonization chamber.

[0010]

The above object is achieved by the following invention.

The invention according to claim 1 of the present application is directed to a coke oven which repeats a cycle of charging coal from a charging inlet, coal carbonization in a carbonization chamber, and discharging red hot coke by an extruder. A lance for blowing air is inserted from the charging port between the charging ports, and air is blown into a space above the coking chamber, thereby removing carbon adhering to the vicinity of a coke oven coking chamber ceiling.

According to a second aspect of the present invention, in the method for removing carbon adhering in the vicinity of the ceiling of a coke oven carbonization chamber according to the first aspect, a lance for blowing air is inserted into a charging port farthest from the riser. A method for removing carbon adhering in the vicinity of a ceiling portion of a coke oven carbonization chamber.

According to a third aspect of the present invention, in the method for removing carbon adhering near the ceiling of a coke oven carbonization chamber according to the first or second aspect, the air flow rate and the air blowing time from the air blowing lance are controlled. This is a method for removing carbon adhering near the ceiling of a coke oven carbonization chamber.

According to a fourth aspect of the present invention, in the method for removing carbon adhering near the ceiling of a coke oven carbonization chamber according to any one of the first to third aspects, the blowing air flow rate is adjusted by the temperature of the exhaust gas in the riser. This is a method for removing carbon adhering to the vicinity of the ceiling of a coke oven carbonization chamber.

According to a fifth aspect of the present invention, in the method for removing carbon adhering near the ceiling portion of a coke oven carbonization chamber according to any one of the first to fourth aspects, a lance for blowing air is supported so as to be able to move up and down, and the upper part of the carbonization chamber is supported. This is a method for removing carbon adhering near the ceiling of a coke oven carbonization chamber, wherein air is blown while moving up and down the space.

The invention according to claim 6 of the present application is directed to a coke oven control device for controlling a coke oven which repeats a cycle of charging coal from a charging inlet, coal carbonization in a carbonization chamber, and discharging red hot coke by an extruder. A coke oven control device for inserting a lance for blowing air from the charging port between the coal carbonization and discharging the red hot coke, and controlling the air to be blown into the space above the carbonization chamber.

[0017] The invention according to claim 7 of the present invention is directed to a lance used in a coke oven which repeats a cycle of charging coal from a charging port, carbonizing in a carbonization chamber, and discharging red hot coke by an extruder. It is to be inserted from the charging inlet until red hot coke is discharged after carbonization, and has an air ejection hole for blowing air into the space above the carbonization chamber, and the lower end of the insertion is between the red hot coke and the ceiling. A lance characterized in that it is located at a length.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Coke is charged into a coke oven carbonization chamber, and after being carbonized for about 15 to 18 hours, it burns down (a state in which gas escapes), and further has a slight storage time (this time). After the elevating pipe lid is opened), red hot coke is discharged from the furnace by an extruder, sent to a CDQ (dry fire extinguishing system) as a conveyed cold coke, and manufactured in a series of processes to be commercialized. Is done.

The present invention has been devised for the purpose of intensively removing carbon adhering in the vicinity of the ceiling of a coke oven carbonization chamber in a short time. The details will be described below with reference to the drawings. FIGS. 1, 2 and 3 are diagrams showing an embodiment of the present invention. FIG. 2 is an enlarged view of a portion A in FIG. 1, that is, an air blowing portion. Further, FIG.
FIG. 3 is a sectional view in the Z direction of FIG. 2, that is, a view as seen from the side of the extruder or the guide wheel. In the drawing, 7 is red hot coke, 8 is a furnace top space portion of carbonization chamber, 9 is attached carbon, and 13 is a charging inlet cover, and other symbols are the same as those in FIG.

As shown in FIG. 1, a state in which the red hot coke 7 remains in the carbonization chamber, that is, before the coke is extruded after the coal is carbonized, the red hot coke 7 and the carbonization chamber furnace top space 8 formed by the carbonization chamber furnace top. Then, the lance 3 for blowing air is inserted, and external air is injected at high speed. The carbon adhering to the ceiling is combusted by the carbonization heat and oxygen in the blown air to remove carbon. 2 and 3, it can be seen that the airflow 6 from the air blowing lance 3 directly acts on the attached carbon 9 in the ceiling space and the charging port. Note that the streamlines of the airflow 6 indicated by dotted lines with arrows in FIG. 2 are not bilaterally symmetrical when there is a riser (not shown) on the right side of FIG. This is to indicate that the vehicle finally reaches the right riser. As shown in FIG. 1, it is desirable to insert the air blowing lance from the inlet farthest from the riser from the viewpoint of carbon removal efficiency in the carbonization chamber width direction. In this case, the other insertion ports are closed by the charging port lid 13 so that the airflow from the lance does not leak out of the furnace.

The coking chamber is wide in the state of an empty kiln (after completion of the extrusion work), but the coking chamber in the carbonization process is filled with red-hot coke, so that only the vicinity of the ceiling of the coking chamber is a space. It has become. For this reason, by inserting the air blowing lance into this narrow space and blowing the external air at a high speed, carbon attached to the vicinity of the ceiling and around the charging port can be intensively burned and removed in a short time. .

The so-called good car
There are two types, Bonn and Bad Carbon. A good carbon is a carbon (also called a film carbon) having a thin film formed on a brick in a furnace in order to maintain the airtightness of the carbonization chamber, and is a bad carbon. The term "carbon" means that the film carbon grows and becomes thicker. Therefore, in order to remove only bad carbon and not to remove good carbon, the following method is used in practicing the present invention.

If the amount of air is too large, heat is applied to remove the film carbon and damage the bricks. Therefore, it is necessary to properly control the air flow rate and the air blowing time. Although slightly different depending on the size of the carbonization chamber, the air blowing time is preferably 10 seconds or less, usually about 7 to 8 seconds. This time does not delay the operating cycle of the coke oven itself. The air flow rate also differs slightly depending on the size of the carbonization chamber, but is generally 3000 Nm ³ /
H or less is desirable. Further, the air flow rate is adjusted by the blown air flow rate depending on the exhaust gas temperature of the riser. This is because if the temperature is too high, good carbon is burned off. When the exhaust gas temperature is 800 ° C. or higher, the air flow rate is reduced. Specific air flow control is performed by damper opening control or blower rotation speed control.

Further, by blowing air while raising and lowering the air blowing lance in the space above the carbonization chamber, carbon in the ceiling space and the charging port can be more efficiently removed.

Each of the above-described carbon removing methods is realized by the following hardware shown in FIG. That is, in the inserted state, the driving device 21 raises and lowers the short lance 3 whose lower end is located in the coking chamber furnace top space 8 between the ceiling and the red hot coke 7. Air for blowing out is flown into the short lance 3 by the air blowing means 22. Control device 23
Implements each of the above-described carbon removing methods by controlling the driving device 21 and the air jetting means 22.

Also, a short lance 3 for this embodiment is used.
Is used at the charging port located farthest from the riser pipe among the three charging ports. In the remaining two places, a long lance 31 similar to that shown in FIG. 4 is used. The carbon that adheres to the ceiling is one short lance 3
Accordingly, carbon adhering to the entire carbonization chamber is removed by the conventional two long lances 31 and short lances 3.

[0027]

As described above, the present invention is characterized in that carbon in the ceiling space and the charging port of the carbonization chamber is removed by burning. High-speed air is injected into the ceiling space to generate convective air at every corner, and carbonization can be performed in a short time by dry distillation heat. By applying the present invention, the carbon can be easily removed, and the charging and charging of coal can be performed.
Efficiency of leveling and extrusion work is achieved, and damage to the furnace wall and exposure of the brick joint are not caused.

Further, since the dry distillation heat can be used effectively because the outside air is blown for a short time while the red-hot coke remains in the carbonization chamber, there is no excessive temperature decrease in the furnace due to this operation, and special furnace bodies and equipment are required. Does not require a pause.
Great economic effects such as extremely high productivity.

Further, the conventional operation of manually pushing down the adhered carbon is unnecessary, and the 3K operation can be eliminated.
In addition, since carbon in the ceiling can be removed, gas leakage to the outside can be avoided, and useful effects such as complete recovery of coke oven gas can be obtained.

[Brief description of the drawings]

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

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a sectional view in the Z direction of FIG. 2;

FIG. 4 is a diagram illustrating a conventional technique.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 carbonization chamber 2 riser pipe 3 air blowing lance 4 loading port 5 carbonization chamber ceiling 6 airflow 7 red hot coke 8 carbonization chamber furnace top space 9 adhered carbon 10 air 11 extruder side furnace lid 12 guide car side furnace lid 13 Inlet lid 21 Drive device 22 Air ejection means 23 Control device 31 Lance for air ejection

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsuro Miyake 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Masahiro Urayasu 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Sun (72) Inventor Hirokazu Takahashi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan 1-2.Inventor Takashi Kobayashi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan 1-2 F term in the company (reference) 4H012 EA00

Claims (7)

[Claims] 1. A coke oven which repeats a cycle of charging coal from a charging port, coal carbonization in a carbonization chamber, and discharging red hot coke by an extruder, wherein the charging port is provided after the carbon dry distillation and before red hot coke is discharged. A lance for blowing air out of the coke oven and blowing air into a space above the carbonization chamber to remove carbon adhering near the ceiling of the coke oven carbonization chamber. 2. A method for removing carbon adhering in the vicinity of a ceiling portion of a coke oven carbonization chamber according to claim 1, wherein a lance for blowing air is inserted into a charging port furthest from the rising pipe. How to remove carbon adhering near the ceiling of the room. 3. The method for removing carbon adhering in the vicinity of a ceiling portion of a coke oven carbonization chamber according to claim 1, wherein an air flow rate and an air blowing time from an air blowing lance are controlled so as not to remove the film carbon. A method for removing carbon adhering near the ceiling of a coke oven carbonization chamber. 4. A method for removing carbon adhering to the vicinity of a ceiling portion of a coke oven carbonization chamber according to claim 1, wherein the flow rate of blown air is adjusted according to the temperature of exhaust gas in a riser. How to remove carbon adhering near the ceiling of the room. 5. The method for removing carbon adhering to the vicinity of the ceiling of a coke oven carbonization chamber according to claim 1, wherein air is blown up and down while supporting an air blowing lance so as to be able to move up and down. A method for removing carbon adhering near the ceiling of a coke oven carbonization chamber, characterized by blowing. 6. A coke oven control device for controlling a coke oven which repeats a cycle of charging coal from a charging inlet, coal distillation in a carbonization chamber, and discharging red hot coke by an extruder, comprising: A coke oven control device for inserting a lance for blowing air from the charging port therebetween and controlling to blow air into a space above the carbonization chamber. 7. A lance used in a coke oven which repeats a cycle of charging coal from a charging inlet, coal carbonization in a carbonization chamber, and discharging red hot coke by an extruder, in a lance used after the carbon dry distillation until red hot coke is discharged. It is inserted from the charging inlet, and has an air ejection hole for blowing air into the space above the carbonization chamber, the insertion lower end is a length that is located between the red hot coke and the ceiling. Lance to feature.