JPH05194957A - Removal of carbon deposited on the wall of coke oven - Google Patents

Abstract

PURPOSE:To remove the carbon deposited on the wall of a coke oven by burning the pushing work according to the condition of the deposition of carbon so that the deposited carbon may become uniform. CONSTITUTION:During the pushing of coke, the wall temperature of an oven and the temperatures in predetermined positions of the oven are measured and then compared with the preset pattern. The carbon deposited on the areas whose temperatures are lower than the set ones are burnt up by blowing carbon-burning air to the areas during the retreatment of a pushing rack 1. Alternatively, after judging to which of the following cases the actual case belongs: the case (i) in which the temperatures are wholly lower than the temperature set pattern, the case (ii) in which the temperatures are wholly higher than the pattern, and the case (iii) in which part of the temperatures are extremely higher than the pattern, the deposited carbon is burnt up in the case (i) by blowing burning air according to the pattern determined according to the wall temperature during the retreatment of a pushing rack 1, the blowing of carbon-burning air is stopped in the case (ii), and the deposited carbon is burnt up in the case (iii) by blowing carbon-burning air for a given time after stopping the pushing rack in that position during the retreatment of the rack. Thus, the deposited carbon can be removed during the pushing work of a coke oven without any trouble during pushing of coke or the formation of black smoke from a stack due to leak of gas into the combustion chamber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing carbon adhering to the wall surface of a carbonization chamber of a coke oven during kiln removal.

[0002]

2. Description of the Related Art In a chamber furnace coke oven, the coke oven gas generated when carbonized in a carbonization chamber is carbonized to form coke, is mainly pyrolyzed through a space between a coke layer and a furnace wall. While receiving it, it reaches the furnace top space, and is collected from the gas discharge passage of the furnace top space to the main air collecting pipe through the rising pipe, sucked by the blower and discharged to the gas purification process. Therefore, carbon generated by thermal decomposition of hydrocarbons in the generated coke oven gas adheres and deposits on the furnace wall surface of the carbonization chamber. When carbon adheres to the carbonization chamber wall surface and grows sequentially,
When the coke is extruded, not only may it be stopped or clogged, but also an excessive force may be transmitted to the carbonization chamber wall to cause damage such as cracking of the wall brick. On the other hand, when carbon does not adhere to the wall of the carbonization chamber, gas leaks from the joint of the brick forming the wall to the combustion chamber, causing pollution problems such as black smoke generation from the chimney due to incomplete combustion. .. Therefore, in the carbonization chamber of the chamber furnace coke oven, it is ideal to remove the adhering carbon only on the wall surface portion where the amount of adhering carbon is large, and to keep the carbon thinly and uniformly adhering to the entire wall surface.

Conventionally, to remove carbon adhering to the wall surface of the carbonization chamber, the charging lid at the ceiling of the carbonization chamber is opened, and an operator uses a spear-shaped jig with a sharp tip to drop carbon. As a method of removing, or after extruding the coke,
Attach the furnace lid to empty the carbonization chamber for one cycle, open the canopy of the ascending pipe, open the coal charging port farthest from the ascending pipe, and suck air by natural draft from the coal charging port to the wall surface. The adhered carbon is burned and removed. However, the method of dropping carbon using a spear-shaped jig is a dangerous heavy-duty work under a bad environment such as high heat, gas, and dust, and since carbon is completely removed from the furnace wall, The joint sealing of bricks due to carbon disappears, gas leaks from the carbonization chamber to the combustion chamber, and black smoke is generated from the chimney due to incomplete combustion, which is not preferable in terms of environmental measures. Also, the method of opening the furthest coal inlet from the riser pipe and sucking in air by natural draft to burn off the carbon is that the air flowing from the coal inlet reaches the furnace bottom due to the difference in specific gravity from the hot air in the furnace. It descends, moves to the riser side along the bottom of the furnace, and when it reaches the bottom of the riser, it turns upward due to the stack effect of the riser, most of it flows out of the riser, and part of it rises along the roof of the furnace. Return to the side opposite the tube. For this reason,
The carbon burning rate distribution at each position in the furnace is large below the coal charging port where air flows in, and is the smallest around 2 to 5 m from the furnace bottom in the center of the furnace chamber. Under the coal charging port, not only the carbon adhering to the furnace wall surface but also the carbon invading the brick joint part disappears, causing joint breakage. On the other hand, there is a drawback that carbon cannot be burned off sufficiently in the vicinity of 2 to 5 m from the furnace bottom in the center of the furnace chamber.

In order to solve the above drawbacks, it is necessary to accurately detect the position of carbon deposited on the furnace wall. As a method of detecting the position of carbon adhering to the furnace wall, the time-dependent change of the load received by the coke extruder is measured, and the distance the coke extruder has moved by the elapsed time from the start of the kiln removal of the peak value of the measured load. Then, the position of the carbon adhering to the wall of the carbonization chamber is detected based on this distance (Japanese Patent Laid-Open No. 62-
34982) has been proposed. In addition, as a method for burning off adhered carbon, the total inflow air amount from each coal charging port should be equal to the outflow air amount due to the stack effect of the rising pipe, corresponding to the carbon deposition thickness under each coal charging port in the carbonization chamber. There has been proposed a method of adjusting the opening of each charging port and burning off carbon at each opening of the charging port for 2-3 hours (Japanese Patent Publication No. 63-18992).

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the method disclosed in Japanese Unexamined Patent Publication No. 982, as the load is applied to the coke extrusion rack, the coke contracts in the extrusion direction and is pressed down, and the contraction phenomenon increases until it reaches the discharge side of the coke, and reaches the discharge side end. When it peaks,
This is based on the principle that the entire contracted coke starts to move and the load decreases. However, in addition to the contraction of coke, the load fluctuation that the extrusion rack receives is
Some are due to carbon adhesion and others are due to the burning condition of coal. For this reason, the change in load due to the adhesion of carbon on the extrusion rack does not always match the movement distance. Further, the method disclosed in Japanese Examined Patent Publication No. 63-18992 adjusts the amount of inflowing air from each carbonization port in accordance with the carbon deposition thickness under each carbonization port of the carbonization chamber. It is necessary to visually judge or measure, and it is extremely difficult to adjust the amount of inflow air from each charging port corresponding to the carbon deposition thickness, which is not a practical method.

An object of the present invention is to provide a method for removing carbon from a coke oven furnace wall, which can remove carbon by combustion during the kiln removal work and can optimally remove carbon according to the state of carbon adhesion. ..

[0007]

Means for Solving the Problems The inventors of the present invention have conducted various tests and examinations in order to achieve the above object. As a result of observing the furnace wall after the completion of coke extrusion, the temperature of the part where carbon has adhered to the furnace wall is lower than that of the furnace wall where no carbon has adhered. Found that the change. Then, by measuring the furnace wall temperature and the moving distance of the extrusion rack during coke extrusion, it is possible to accurately identify the carbon adhesion position and blow carbon combustion air to the furnace wall according to the furnace wall temperature when the extrusion rack moves backward. The present invention has been reached by the conclusion that the carbon deposition amount can be made uniform by the addition.

That is, the present invention is a method for incinerating and removing carbon adhering to the wall of a carbonization chamber of a chamber furnace type coke oven, in which the oven wall temperature and the temperature measurement position are measured during coke extrusion and comparison with a preset temperature pattern is carried out. However, the air for carbon incineration is blown to the portion lower than the set temperature when the extrusion rack moves backward.

In addition, in the method for incinerating and removing the carbon adhering to the wall surface of the carbonization chamber of the chamber furnace type coke oven, the oven wall temperature and the temperature measurement position are measured and stored when the coke is extruded and compared with a preset temperature pattern. Determine whether the overall furnace wall temperature is low, the overall furnace wall temperature is high, or a portion is extremely low, and the overall furnace wall temperature is low. In the case, when the extrusion rack is retracted, the air for carbon incineration is blown in a predetermined pattern determined by the temperature of the furnace wall. When the furnace wall temperature is extremely low, the air for carbon incineration is blown with a maximum air flow for a predetermined time after stopping once at that position when the extrusion rack moves backward.

[0010]

According to the present invention, the temperature of the furnace wall of each part is measured by providing a plurality of radiation thermometers at the rear of the ram head of the extrusion rack in the left-right and up-down directions and measuring the temperature of the furnace wall of each part during coke extrusion. For the measurement of the temperature measurement position, an encoder is provided on the extrusion rack, and the position of the radiation thermometer provided at the rear of the ram head of the extrusion rack is measured according to the distance from the kiln. The preset temperature pattern set in advance is set for each kiln according to the temperature corresponding to the operating rate of the coke oven. Generally, the temperature of the furnace wall immediately after coke extrusion is a high temperature of 1000 ° C. or higher,
The temperature distribution in the furnace length direction is 12 to 10 mm per 10 mm width according to the taper of the furnace width from the pusher side to the coke side.
A temperature gradient of 15 ° C is set. The temperature distribution in the furnace height direction usually has a difference of 30 to 60 ° C. Therefore, the set temperature pattern to be set is set in consideration of the temperature gradient in the furnace length direction and the furnace height direction. When the carbon adheres to the furnace wall, the temperature of the furnace wall becomes lower than that when the carbon is normal. The degree of decrease in the furnace wall temperature due to the carbon deposition increases as the amount of carbon deposited increases. Therefore, the set temperature is set to be about 100 ° C. lower than the normal furnace wall temperature, and when the furnace wall temperature is lower than the set temperature, it is determined that carbon is attached to the furnace wall portion. To blow the air for carbon incineration onto the furnace wall to which carbon is attached, an axial fan is installed at the rear of the extrusion rack, the extrusion rack is used as a duct, and a damper is installed to face the radiation thermometer installation position. The spray nozzle is connected to the extrusion rack, and the air for carbon incineration is sprayed on the carbon adhering portion. The air flow control of the axial fan in this case is
It suffices that an arbitrary rotation speed (air volume) can be set by inverter control.

In selecting the carbon incineration pattern based on the measurement result of the furnace wall temperature of each part in the present invention, the furnace wall temperature and the temperature measurement position of each part of each kiln are input to the calculating part, and a comparison is made with a preset temperature pattern. After selecting a preset carbon burning pattern based on the calculation result, the carbon burning pattern of the kiln is determined. The preset carbon incineration patterns are three patterns in which the furnace wall temperature is generally low, the furnace wall temperature is generally high, and a part of the furnace wall is extremely cold. And if you select a pattern when the furnace wall temperature is low overall, determine the rotation speed of the axial fan corresponding to the temperature measurement position based on the measurement results of the furnace wall temperature and temperature measurement position of each part of the kiln, The rotation speed control of the axial fan is performed according to the temperature measurement position measured by the encoder. Also, if a pattern in which the furnace wall temperature is high is selected as a whole, the axial fan is switched to the turning operation, and the incineration of carbon is stopped. Furthermore, if you select a pattern when the temperature of a part of the furnace wall is extremely low, when the extrusion rack moves backward, the backward movement is stopped at a position where the carbon deposition is extremely low and the temperature is extremely low. Control the rotation speed to the motor rated rotation speed and incinerate the adhered carbon.

[0012]

【Example】

Example 1 Details of the method of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic configuration explanatory view showing an example of an apparatus for carrying out the method of the present invention, FIG. 2 is a flow chart showing a basic operation flow, and FIG. 3 shows an example of a rotational speed and a changing position of an axial fan in the case of pattern A. It is a graph. In FIG. 1, 1 is an extrusion rack installed in an extruder of a coke oven, 2 is a ram head provided at the tip of the extrusion rack 1,
3, 4, 5, 6, 7, and 8 (6 to 8 are not shown) are radiation thermometers for measuring the furnace wall temperature provided at the upper, lower, left, right, and rear of the rear portion of the ram head 2, and 9 is a radiation thermometer. In the encoder for detecting the temperature measurement position of 8, the measurement results of the radiation thermometers 3 to 8 and the encoder 9 are input to the control unit 11 on the extruder via the slip ring 10. Reference numeral 12 is an axial fan, which uses the extrusion rack 1 as a duct, and has a nozzle 13 having a damper (not shown) that directs the radiation thermometers 3 to 8 positions,
14, 15, 16, 17, and 18 (16 to 18 are not shown) are connected to the extrusion rack 1. Reference numeral 19 is a control device for the axial fan 12 and dampers (not shown) for the nozzles 13 to 18, and 20 is an operation desk provided in the cab of the extruder for automatic and semi-automatic mode selection and carbon incineration pattern selection during manual operation. The temperature measurement position by the encoder 9 and the rotation speed of the axial flow fan 12 are displayed as well.

When the automatic mode is selected in the operation desk 20 by the mode selection, as shown in FIG. 2, the control unit 11 causes the radiation thermometers 3 to 8 and the encoder 1 during coke extrusion.
The furnace wall temperature data and the temperature measurement position data at the upper, middle and lower positions of the furnace walls on the left and right of the carbonization chamber inputted from 2 are compared and calculated with the preset temperature pattern of each temperature measurement position inputted in advance from the operation desk 20. Preliminarily set based on the calculation result, the furnace wall temperature is generally low, the B pattern is entirely warm, and the part of the C pattern is extremely cold. Select the applicable pattern from the three carbon incineration patterns. And the control unit 11
Is the opening / closing position of the damper of the nozzles 13 to 18 when the selected pattern is the pattern A and the furnace wall temperature is low as a whole,
The rotational speed and the changed position of the axial fan 12 are determined, and the determined opening / closing positions of the dampers of the nozzles 13 to 18, and the determined rotational speed and the changed position of the axial fan 12 are instructed to the control device 19. Further, when the selected pattern is the B pattern and the furnace wall temperature is high as a whole, the turning operation of the axial fan 12 is determined, and the turning operation of the axial fan 12 is instructed to the control device 19. Further, when the temperature of a part of the furnace wall of the selected pattern is C pattern is extremely low, the opening / closing positions of the dampers of the nozzles 13 to 18, the rotation speed and changing position of the axial fan 12, and the extrusion rack stop position and stop time are set. The control unit 19 is instructed of the determined opening / closing positions of the dampers of the nozzles 13 to 18, the rotational speed and changing position of the axial fan 12, and the extrusion rack stop position and stop time. It should be noted that FIG. 3 shows an example of the rotational speed and the changing position of the axial fan in the case of the pattern A.

When the opening / closing positions of the dampers of the nozzles 13 to 18, the rotation speed and the changing position of the axial fan 12 are commanded, the control device 19 completes the extrusion of the coke and starts the backward movement of the extrusion rack 1. Position data of the radiation thermometers 3 to 8 input from the encoder 9 and the nozzles 13 to 18
Comparing the open / close position of the damper and the rotational speed changing position of the axial fan 12, the dampers of the respective nozzles 13 to 18 are opened / closed when reaching the opening / closing position of the damper, and the rotational speed changing position of the axial fan 12 is also compared. When it reaches, the rotation speed of the axial fan 12 is changed. In addition, when the turning operation of the axial fan 12 is instructed, the control device 19 causes the axial fan 1 to operate.
The rotation speed of 2 is controlled to 30 rpm. Further, when the opening / closing positions of the dampers of the nozzles 13 to 18, the rotation speed and the changing position of the axial fan 12, and the extrusion rack stop position and the stop time are instructed, the control device 19 completes the extrusion of the coke and completes the extrusion rack. When the backward movement of 1 is started, the position data of the radiation thermometers 3 to 8 input from the encoder 9 and
Opening / closing positions of dampers of nozzles 13 to 18, axial fan 1
2 rotation speed changing positions are compared, and the respective nozzles 13 to
When the open / close position of the damper 18 is reached, each damper is opened / closed, and when the rotational speed change position of the axial fan 12 is reached, the rotational speed of the axial fan 12 is changed. When reaching the stop position of the extrusion rack 1, the backward movement of the extrusion rack 1 is stopped for a predetermined time, the dampers of the predetermined nozzles 13 to 18 are opened and closed, and the rotation speed of the axial fan 12 is controlled to a rated value of 2860 rpm, and the predetermined value is set. When the time elapses, the backward movement of the extrusion rack 1 is resumed to reduce the rotation speed of the axial fan 12.

As shown in FIG. 2, when semi-automatic is selected by the mode selection on the operation desk 20 and the furnace wall temperature of the pattern A preset by the pattern selection is low as a whole,
When the corresponding pattern is selected from the three carbon incineration patterns in the case where the furnace wall temperature of the B pattern as a whole is high and the temperature of a part of the furnace wall of the C pattern is extremely low, the selected pattern is selected. If the furnace wall temperature is high for the B pattern as a whole, the operation desk 20 moves the axial fan 12
The turning operation command is set and the control device 19 is instructed via the control unit 11. The selected pattern is A
If the wall temperature is low throughout the pattern, the operation desk 2
The opening / closing positions of the dampers of the nozzles 13 to 18, the rotation speed and the changing position of the axial fan 12 are set from 0, and the control unit 19 is instructed via the control unit 11. Furthermore, when the temperature of a part of the furnace wall of the selected pattern C pattern is extremely low,
The operation desk 20 sets the opening / closing positions of the dampers of the nozzles 13 to 18, the rotational speed and changing position of the axial fan 12, and the extrusion rack stop position and stop time, and commands the control device 19 via the control unit 11.

When the turning operation of the axial fan 12 is instructed, the controller 19 controls the rotation speed of the axial fan 12 to 30 rpm. When the opening / closing positions of the dampers of the nozzles 13 to 18, the rotational speed and the changing position of the axial flow fan 12 are commanded, the control device 19 completes the extrusion of the coke and starts the backward movement of the extrusion rack 1. , Position data of the radiation thermometers 3 to 8 input from the encoder 9,
Opening / closing positions of dampers of nozzles 13 to 18, axial fan 1
2 rotation speed changing positions are compared, and the respective nozzles 13 to
When the open / close position of the damper 18 is reached, each damper is opened / closed, and when the rotational speed change position of the axial fan 12 is reached, the rotational speed of the axial fan 12 is changed. Further control device 1
9 indicates the opening / closing positions of the dampers of the nozzles 13 to 18, the rotational speed and the changing position of the axial fan 12, and the extrusion rack stop position and the stop time, when the coke extrusion is completed and the extrusion rack 1 is retracted. When started, the position data of the radiation thermometers 3 to 8 input from the encoder 9, the opening / closing positions of the dampers of the nozzles 13 to 18, the axial fan 12 are shown.
The rotation speed changing position of each of the nozzles 13 to 1 is compared.
When the damper opening / closing position of 8 is reached, each damper is opened / closed, and when the rotational speed change position of the axial fan 12 is reached, the rotational speed of the axial fan 12 is changed. When the pushing position of the extrusion rack 1 is reached, the backward movement of the extrusion rack 1 is stopped for a predetermined time, the dampers of the predetermined nozzles 13 to 18 are opened and closed, and the rotation speed of the axial fan 12 is controlled to a rated value of 2860 rpm, and a predetermined value is set. When the time elapses, the backward movement of the extrusion rack 1 is restarted and the rotation speed of the axial fan 12 is reduced.

With the above construction, the temperature of each part of the furnace walls on both sides during the extrusion of the coke is measured by the radiation thermometers 3-8 provided at the rear of the ram head 2 and the radiation thermometers 3-8 by the encoder 9. It is input to the control unit 11 together with the measurement position data. In the control unit 11, the temperature measurement data input by the radiation thermometers 3 to 8 and the measurement position data of the radiation thermometers 3 to 8 by the encoder 9 are set as preset temperature patterns in the furnace length direction of the respective furnace walls. Based on the calculation result, a preset A pattern has a low overall furnace wall temperature, a B pattern has a high overall furnace wall temperature, and a C pattern has a partial furnace wall temperature. A corresponding pattern is selected from three carbon incineration patterns when the temperature is extremely low.

When the selected pattern is the pattern A and the furnace wall temperature is low as a whole, the control section 11 controls the nozzle 13
The opening / closing positions of the dampers Nos. 18 to 18, the rotational speed of the axial fan 12 and the changed positions are determined, and the determined opening / closing positions of the dampers of the nozzles 13 to 18, the rotational speeds of the axial fan 12 and the changed positions are determined by the control device 19. Order. Control device 19 that received the command
When the extrusion of coke is completed and the backward movement of the extrusion rack 1 is started, the position data of the radiation thermometers 3 to 8 input from the encoder 9, the opening and closing positions of the dampers of the nozzles 13 to 18, and the axial fan are provided. Compare the rotation speed change position of 12
When the damper open / close position of each nozzle 13-18 is reached, each damper is opened / closed, and when the rotational speed change position of the axial fan 12 is reached, the rotational speed of the axial fan 12 is changed. Further, when the selected pattern is the B pattern and the furnace wall temperature is high as a whole, the control unit 11 determines the turning operation of the axial fan 12, and instructs the control device 19 to perform the turning operation of the axial fan 12. Upon receiving the command, the control device 19 controls the rotational speed of the axial fan 12 to 30 rpm when the turning operation of the axial fan 12 is commanded. Furthermore, when a part of the furnace wall having the selected pattern C is extremely low in temperature, the control unit 11 causes the nozzles 13 to
18, the opening / closing position of the damper, the rotational speed and the changing position of the axial fan 12, the extrusion rack stop position and the stop time are determined, and the determined opening / closing position of the damper of the nozzles 13 to 18 and the rotational speed of the axial fan 12 are determined. The controller 19 is instructed of the changed position, the extrusion rack stop position and the stop time. The control device 19 that has received the command, when the opening / closing positions of the dampers of the nozzles 13 to 18, the rotation speed and the changing position of the axial fan 12, and the extrusion rack stop position and the stop time are instructed,
When the extrusion of the coke is completed and the backward movement of the extrusion rack 1 is started, the radiation thermometer 3 input from the encoder 9
8 is compared with the opening / closing positions of the dampers of the nozzles 13 to 18 and the rotational speed changing position of the axial fan 12, and when the opening / closing positions of the dampers of the respective nozzles 13 to 18 are reached, the dampers are opened and closed. When the rotational speed changing position of the axial fan 12 is reached, the rotational speed of the axial fan 12 is changed. When reaching the stop position of the extrusion rack 1, the backward movement of the extrusion rack 1 is stopped for a predetermined time, and the predetermined nozzles 13 to 1 are
The damper of No. 8 is opened and closed to control the rotation speed of the axial fan 12 to the rated value of 2860 rpm, and after a predetermined time has elapsed, the backward movement of the extrusion rack 1 is restarted to reduce the rotation speed of the axial fan 12.

When semi-automatic is selected in the mode selection of the operation desk 20 and any of the carbon incineration patterns A to C is selected in the pattern selection, the opening / closing positions of the dampers of the nozzles 13 to 18 are selected according to the selected pattern. Since the operation is the same as the automatic operation except that the rotation speed and change position of the axial fan 12 and the extrusion rack stop position and stop time are set from the operation desk 20, the description thereof will be omitted.

Therefore, according to the method of the present invention, air for carbon incineration is not supplied to the portion having a small carbon deposition amount according to the amount of deposited carbon based on the measurement result of the furnace wall temperature of each kiln, and the carbon deposition is not performed. Air for carbon incineration is intensively supplied to the portion where the amount is large, so that carbon on the furnace wall of the coke oven carbonization chamber is removed, and the amount of adhesion is thin and uniform. As a result, during operation of the coke oven, carbon can be removed so that the carbon remains thinly and uniformly on the furnace wall, incomplete combustion due to gas leaking from the brick joint into the combustion chamber can be prevented, and black smoke from the chimney is generated. It is possible to solve environmental problems caused by. In addition, in the said Example 1, although the case where the control part 11 was installed in the extruder was demonstrated,
The same effect can be obtained by installing the control unit 11 on the ground and exchanging signals with the extruder by induction radio or the like.

Example 2 Using the apparatus of Example 1, the furnace height was 7125 mm and the furnace width was 46.
In a coke oven with a length of 0 mm and a furnace length of 16500 mm, 515 mm and 3020 from the bottom of the ram head of the extruder
mm, 5555 mm, and radiation thermometers are installed at three places on the left and right (six places in total). As the method of the present invention, the air flow rate is set to 120% for the portion of the furnace wall temperature of 950 ° C. or less, and 100 ° C. Carbon incineration was carried out for the above parts by setting the air volume to 60%. Further, as a comparative example, carbon incineration and removal were always carried out with 100% air volume and 30% air volume. As a result, after 20 days of automatic operation, dust was always found in the combustion chamber of the carbonization chamber with 100% air volume, so the experiment was stopped. As shown in FIG. 4, the carbonization chamber with a 30% air volume always showed an increasing tendency of the extrusion torque during coke extrusion after 30 days, and after 20 days, the extrusion torque was 20%.
%, So the experiment was stopped. On the other hand, in the carbonization chamber of the method of the present invention, as shown in FIG. 4, the extrusion torque during coke extrusion is reduced by 20 to 30% from around 30 days and is stable, and the extrusion torque is stable even after 50 days. Moreover, no black smoke was generated due to incomplete combustion due to gas leak into the combustion chamber.

[0022]

As described above, according to the method of the present invention, the carbon adhesion position and the carbon adhesion amount to the furnace wall surface are accurately detected during the coke oven kiln removal work, and the furnace wall surface is corresponding to the carbon adhesion amount. Since it can be incinerated and removed so that the amount of adhered carbon of the product can be uniformly thinned, it is possible to prevent extrusion trouble during coke extrusion and generation of black smoke from the chimney due to gas leakage into the combustion chamber.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory view showing an example of an apparatus for carrying out the method of the present invention.

FIG. 2 is a flowchart similarly showing a basic operation flow.

FIG. 3 is a graph showing an example of a rotational speed and a changing position of an axial fan in the case of the pattern A in the first embodiment.

FIG. 4 is a graph showing the relationship between the pushing force and the elapsed time between the carbonization chamber of the present invention method and the carbonization chamber having a constant 60% air flow rate in Example 2.

[Explanation of symbols]

 1 Extrusion Rack 2 Ram Head 3, 4, 5, 6, 7, 8 Radiation Thermometer 9 Encoder 10 Slip Ring 11 Controller 12 Axial Fan 13, 14, 15, 15, 16, 17, 18 Nozzle 19 Controller 20 Operation Desk

Claims (2)

[Claims] 1. A method for incinerating and removing carbon adhering to the wall of a carbonization chamber of a chamber-type coke oven, in which the oven wall temperature and temperature measurement position are measured during coke extrusion, and the temperature is compared with a preset temperature pattern and set. A method for removing carbon from a furnace wall of a coke oven, characterized in that air for carbon incineration is blown to a portion lower than the temperature when the extrusion rack moves backward. 2. In a method for incinerating and removing carbon adhering to a carbonization chamber wall surface of a chamber furnace type coke oven, a furnace wall temperature and a temperature measurement position are measured and stored when the coke is extruded and compared with a preset temperature pattern. Whether the furnace wall temperature is low overall,
Determine whether the furnace wall temperature is high overall or a part of it is extremely low.If the furnace wall temperature is low overall, when the extruder rack moves backward, When the carbon incinerator air is blown in a predetermined pattern determined by the wall temperature and the furnace wall temperature is high overall, the blowing of the carbon incinerator air is stopped, and when part of the furnace wall temperature is extremely low, A method for removing carbon from a furnace wall of a coke oven, which comprises stopping once at that position when the extrusion rack moves backward and blowing the carbon incineration air with a maximum air flow for a predetermined time.