Method for removing carbon deposits from coke oven carbonization chambers

Abstract

To provide a deposit carbon removal method in a coke oven carbonization chamber which can realize both push clogging generation inhibition and black smoke generation inhibition.SOLUTION: There is provided a method for inserting a lance into a carbonization chamber for blowing an oxygen-containing gas thereinto to thereby perform oxidation removal of deposit carbon. The method includes: when coal carbonization operation after execution of deposit carbon removal operation in the carbonization chamber is performed, measuring a CO concentration of exhaust combustion gas which passes through a combustion chamber adjacent to the carbonization chamber with the deposit carbon being removed therefrom; comparing a preset upper limit or lower limit management criterion value of the CO concentration of the exhaust combustion gas in the combustion chamber to an actual measured value of the CO concentration of the exhaust combustion gas; and, when deposit carbon removal operation after the coal carbonization operation is performed, 1) if the actual measured value exceeds the CO concentration upper limit management criterion value, shortening a blowing-into time of the oxygen-containing gas and / or decreasing a blowing-into amount per unit time and 2) if the actual measured value is less than the CO concentration lower limit management criterion value, extending the blowing-into time of the oxygen-containing gas and / or increasing the blowing-into amount per unit time.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a method for oxidizing and removing carbon adhering to the inside of a coke oven carbonization chamber. [Background technology]

[0002] In the carbonization chamber of a coke oven, carbon produced by the thermal decomposition of the carbonization product gas and pulverized coal scattered when the coal is charged adhere to the oven walls and turn into coke, resulting in the formation of adhered carbon. As this carbon deposit on the furnace wall grows on the furnace wall surface, it reduces the thermal conductivity of the furnace wall and the effective volume of the coke chamber, thereby lowering furnace productivity and even making it impossible to push out coke, which is known as clogging, and therefore requires periodic removal work. To solve this problem, various methods have been proposed in the past, in which an injection nozzle (lance) is inserted into the carbonization chamber and a gas containing oxygen, such as air, is injected to burn off the carbon.

[0003] For example, Patent Document 1 describes that by supplying an oxygen-containing gas into a carbonization chamber and measuring the CO2 concentration when exhaust gas generated by the oxidation of the attached carbon is exhausted from the carbonization chamber, the time when the combustion of the attached carbon is completed can be determined from the change in the concentration. This is based on the discovery of a strong correlation between the amount of attached carbon and the CO2 concentration in the exhaust gas. Furthermore, Patent Document 1 also describes that in addition to measuring the CO2 concentration in the exhaust gas as described above, measuring the temperature of the exhaust gas discharged from the carbonization chamber can help determine whether the combustion of the attached carbon has been completed. Patent Document 2 describes that by supplying a gas containing oxygen (oxygen-containing gas) to a coking chamber and measuring the O2 concentration when exhausting the exhaust gas generated by the oxidation of the adhering carbon from the coking chamber, the smoothness of the coking chamber oven walls can be estimated from the change in concentration. This is based on the discovery of a strong correlation between the O2 concentration in the exhaust gas and the smoothness of the carbon adhering to the oven walls. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-124559 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-201925 Summary of the Invention [Problem to be solved by the invention]

[0005] The present inventors have discovered the following regarding carbon deposition during coke oven operation. The carbon deposits were found on both the main body and joints of the bricks in the coking chamber. Depending on the type of coal used and the temperature changes in the combustion chamber and coking chamber during operation, the carbon deposits could either be removed or accumulate during the coal coking operation (hereinafter simply referred to as coking operation).

[0006] Therefore, even if the technology described in Patent Document 1 is used to properly remove adhering carbon when the carbonization operation is stopped, the carbon adhering to the brick joints may be removed during the carbonization operation, and coke oven gas (hereinafter also referred to as COG) may be supplied from the carbonization chamber to the combustion chamber through the brick joints, resulting in poor combustion in the combustion chamber and the combustion exhaust gas emitting black smoke. In addition, with long-term use, the bricks (furnace wall bricks) separating the coking chamber from the combustion chamber may lose their thermal spray material in the joints, causing them to peel off and fall off, leaving those areas clogged with adhering carbon. In this case, the carbon that was blocking the joints is effective in preventing poor combustion in the combustion chamber, as it prevents COG generated in the coking chamber from being supplied to the combustion chamber and causing poor combustion in the combustion chamber. As described above, the technology described in Patent Document 1 has a problem in that it may be difficult to simultaneously suppress clogging and black smoke.

[0007] Furthermore, in the technology described in Patent Document 2, as in Patent Document 1 described above, even if the adhering carbon is properly removed when the carbonization operation is stopped, the carbon adhering to the brick joints may be removed during the carbonization operation, and COG may be supplied from the carbonization chamber to the combustion chamber through the brick joints, causing poor combustion in the combustion chamber and causing the combustion exhaust gas to emit black smoke. As described above, the technology described in Patent Document 2 has a problem in that it may be difficult to simultaneously suppress clogging and black smoke.

[0008] The present invention has been made in view of the above circumstances, and has as its object to provide a method for removing carbon adhering to the coke oven chamber, which is capable of suppressing both the occurrence of clogging and the generation of black smoke. [Means for solving the problem]

[0009] The inventors have come to the realization that, in order to simultaneously suppress clogging and black smoke generation when operating a coke oven, it is important to remove the adhering carbon from the oven walls of the coke oven chamber while leaving an appropriate amount of carbon behind. The gist of the present invention is as follows.

[0010] A first aspect of the present invention that achieves the above object is a method for removing carbon adhering to a coke oven coking chamber, which comprises inserting a lance into the coking chamber and injecting an oxygen-containing gas into the coking chamber to oxidize and remove the carbon adhering to the coking chamber using the heat retained in the coking chamber, and During coal carbonization operation after performing the operation of removing carbon attached to the carbonization chamber, a CO concentration of combustion exhaust gas passing through a combustion chamber adjacent to the carbonization chamber from which carbon attached has been removed is measured; comparing a preset control standard value of the CO concentration of the combustion exhaust gas from the combustion chamber with an actual measured value of the CO concentration of the measured combustion exhaust gas; Provided that the actual measured value exceeds the control standard value, the injection time of the oxygen-containing gas during the operation of removing carbon adhering to the carbonization chamber after the coal carbonization operation is shortened and / or the amount of oxygen-containing gas injected per unit time is reduced.

[0011] The CO concentration in combustion exhaust gas usually has an upper limit, which is an environmental standard, and in coke ovens, a value lower than the environmental standard is set as the upper limit (i.e., the control standard value of the first invention) and used as a control guideline. In other words, if the CO concentration in combustion exhaust gas exceeds the control standard value, it can be assumed that COG is leaking from the coke chamber to the combustion chamber through the joints. In addition, since the control standard value itself varies depending on the combustion adjustment status that differs for each coking chamber (for example, 10 ppm for combustion chamber P, 15 ppm for combustion chamber Q, etc.), it is advisable to determine the control standard value in advance based on the operational results (measurement results) over a certain period of time. Specifically, it is possible to use the upper limit of the numerical range of CO concentration that is considered normal as the control standard value.

[0012] A second aspect of the present invention, which is aimed at achieving the above object, provides a method for removing carbon adhering to a coke oven coking chamber, comprising inserting a lance into the coking chamber and injecting an oxygen-containing gas into the coking chamber, thereby oxidizing and removing the carbon adhering to the coking chamber using the heat retained in the coking chamber, and During coal carbonization operation after performing the operation of removing carbon attached to the carbonization chamber, a CO concentration of combustion exhaust gas passing through a combustion chamber adjacent to the carbonization chamber from which carbon attached has been removed is measured; comparing a preset control standard value of the CO concentration of the combustion exhaust gas from the combustion chamber with an actual measured value of the CO concentration of the measured combustion exhaust gas; Provided that the actual measured value is less than the control standard value, the injection time of the oxygen-containing gas during the operation of removing carbon adhering to the carbonization chamber after the coal carbonization operation is extended and / or the amount of oxygen-containing gas injected per unit time is increased.

[0013] When the CO concentration in the combustion exhaust gas is below the control reference value of the second invention, it can be considered that excessive carbon has adhered to the furnace wall. For this reason, it is advisable to determine the control standard value in advance based on the operational performance (measurement performance) over a certain period. Specifically, the lower limit of the normal range of CO concentration can be used as the control standard value.

[0014] Here, the same term "control reference value" is used in the first and second inventions, but the control reference value (which is essentially the upper limit of the CO concentration) described in the first invention is usually higher (different) than the control reference value (which is essentially the lower limit of the CO concentration) described in the second invention. [Effects of the Invention]

[0015] The method for removing carbon adhering to a coke oven carbonization chamber according to the present invention measures the CO concentration of the combustion exhaust gas passing through a combustion chamber adjacent to the coke oven carbonization chamber during coal carbonization operations after carrying out an operation to remove carbon adhering to the coke oven carbonization chamber, and compares the actual measured value of the CO concentration of the combustion exhaust gas from the combustion chamber with a preset control standard value for the CO concentration of the combustion exhaust gas from the combustion chamber to determine the degree of carbon removal during the operation to remove carbon adhering to the coke oven carbonization chamber after the coal carbonization operations. Specifically, if the actual measured value exceeds the control standard value, too much adhering carbon has been removed (the amount of COG flowing from the carbonization chamber to the combustion chamber is excessive), so the degree of carbon removal is alleviated by shortening the injection time of oxygen-containing gas during the adhering carbon removal operation performed after coal carbonization operation and / or reducing the amount injected per unit time. Furthermore, if the actual measured value is below the control standard value, the removal of the adhering carbon is insufficient (making coke clogging more likely to occur), so the degree of carbon removal is enhanced by extending the injection time of the oxygen-containing gas during the adhering carbon removal operation performed after coal carbonization operation and / or increasing the amount injected per unit time. This allows the carbon to be removed from the furnace walls of the carbonization chamber while leaving an appropriate amount (an amount that blocks the brick joints in the carbonization chamber), thereby achieving both the prevention of clogging and the prevention of black smoke generation. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1A is an explanatory diagram showing the order of processing steps in a method for removing carbon adhering to a coke oven carbonization chamber according to one embodiment of the present invention, and FIGS. 1B to 1D are schematic diagrams of the coal charging step, the coke extrusion step, and the carbon removal step, respectively. [Figure 2](A) to (C) are a cross-sectional view of a coke chamber showing the effect of carbon on coke extrusion properties, a longitudinal cross-sectional view cut along the coke extrusion direction, and a longitudinal cross-sectional view cut in a direction perpendicular to the coke extrusion direction, respectively. [Figure 3] 1(A) to 1(C) are explanatory diagrams showing the behavior of the CO concentration in the combustion exhaust gas from the combustion chamber. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, with reference to the accompanying drawings, embodiments embodying the present invention will be described to aid in understanding the present invention. As shown in Figures 1(A) to (D) and Figures 2(A) to (C), a method for removing carbon adhering to a coke oven carbonization chamber according to one embodiment of the present invention is a method in which a carbon incineration lance (lance) 11 is inserted into the coking chamber 10, an oxygen-containing gas is blown in, and the carbon adhering to the coking chamber 10 is oxidized and removed using the heat retained in the coking chamber 10, thereby suppressing both clogging and black smoke generation. A detailed explanation is provided below.

[0018] First, the coke production process will be described with reference to FIG. As shown in Figure 1(A), the order of the processing steps is as follows: coal 12 is charged into each coking chamber 10 in a furnace battery having multiple coking chambers 10 through a charging port 13 (coal charging process), and then heated and carbonized for a certain period of time (carbonization process) to produce coke. The coke cake 15 in each coking chamber 10 is then extruded (coke extrusion process) using the ram beam 14 of the extruder. Then, a carbon combustion lance 11 is inserted into each coking chamber 10 through the charging port 13, and oxygen-containing gas is blown in (carbon removal process). The cycle is then repeated: coal is charged again (coal charging process). Reference numeral 16 in Figure 1 denotes an uprising pipe for discharging gas generated in the coking chamber 10. Figure 1(B) is a schematic diagram of the coal charging process, Figure 1(C) is a schematic diagram of the coke extrusion process, and Figure 1(D) is a schematic diagram of the carbon removal process.

[0019] Next, the state of carbon deposition and clogging, as well as the outflow of COG and generation of black smoke due to joint opening caused by carbon removal, will be described with reference to FIGS. 2(A) to 2(C). The gas generated during coke carbonization contains hydrocarbon gases, which undergo thermal decomposition in the high-temperature carbonization chamber 10, producing carbon on the coke surface, furnace wall surface, and furnace top space. The carbon produced adheres to the joints of the furnace wall bricks and acts as protective carbon, but if the amount of adhesion is excessive, it acts as a protrusion that creates resistance when the coke is extruded, causing extrusion problems such as clogging and retention. On the other hand, if the amount of carbon adhesion is insufficient, there is no protective carbon layer to seal the furnace wall joints, and the COG generated in the carbonization chamber 10 leaks through the joints into the adjacent combustion chamber 17, causing poor combustion in the combustion chamber 17 and generating black smoke. As described above, if the amount of carbon removed is excessive, black smoke will be generated in the combustion chamber 17, and if the amount of carbon removed is insufficient, clogging will occur when the coke is pushed out.

[0020] The CO concentration of the combustion exhaust gas passing through the combustion chamber 17 is an indicator of the ventilation condition (hole condition and removal condition of attached carbon) of the joints of the refractory (bricks) arranged between the carbonization chamber 10 and the combustion chamber 17. That is, while the coal is being carbonized in the carbonization chamber 10, COG is generated in the carbonization chamber 10 and is supplied to the combustion chamber 17 through broken parts of the joints, causing an increase in the CO concentration of the combustion exhaust gas in the combustion chamber 17, and an increase in the amount of COG supplied leads to the generation of black smoke. Therefore, the inventors of the present application focused on quantitatively evaluating the amount of COG supplied to the combustion chamber through the broken part of the joint by trend management of the CO concentration in the combustion exhaust gas from the combustion chamber. Specifically, in order to quantitatively evaluate the amount of COG supplied to the combustion chamber through the broken part of the joint, they came up with the idea of ​​measuring the CO concentration in the combustion exhaust gas from the combustion chamber adjacent to the carbonization chamber from which the carbon deposits had been removed during coal carbonization operation after performing the operation to remove the carbon deposits from the carbonization chamber.

[0021] When the measured CO concentration of the combustion exhaust gas during coal carbonization operation exceeds a predetermined control standard value A (for example, the upper limit of the numerical range of CO concentration considered normal: standard line), as shown in Figure 3(A), it indicates that the amount of COG being supplied to the combustion chamber through the brick joints is increasing. 3(A) indicates that clogging is suppressed, but the COG supply rate to the combustion chamber increases, which can be interpreted as a sign of black smoke generation. Therefore, the operating conditions for removing carbon from the coke chamber after the coal carbonization operation are weakened. The operating conditions refer to the oxygen-containing gas injection time and the oxygen-containing gas injection amount per unit time (hereinafter the same). These conditions are typically the same as those for removing carbon from the coke chamber before the coal carbonization operation. The oxygen-containing gas injection time is shortened and / or the oxygen-containing gas injection amount is reduced so that the measured CO concentration in the combustion exhaust gas during the subsequent coal carbonization operation is equal to or less than the control standard value A. The oxygen-containing gas injection time and injection amount can be adjusted, for example, based on past operational performance.

[0022] This reduces the amount of carbon that is removed from the joints, so that in the early stages of coal carbonization that follow this carbon removal operation, less COG is supplied to the combustion chamber through the joints, reducing the CO concentration in the combustion exhaust gas from the combustion chamber and preventing the generation of black smoke. For example, the solid line in Figure 3(B) shows the result of weakening the operating conditions for the carbon removal operation described above. The CO concentration on the vertical axis can be affected by changes in the amount of carbon attached to the joints during carbonization operation. For example, if the degree of carbon removal is relaxed, the amount of COG flowing into the combustion chamber decreases, and the CO concentration falls below control standard value A. Furthermore, if carbon components adhere to the joints due to volatile matter generated immediately after charging the coal, the amount of COG flowing into the combustion chamber will further decrease, and the CO concentration will fall.

[0023] The dashed line in Figure 3(B) shows the result when the operating conditions during the above-mentioned carbon deposit removal operation are not weakened (when carbon deposit removal is excessive), in which the amount of COG supplied to the combustion chamber through the brick joints does not decrease, and the CO concentration is higher than the control standard value A. Specifically, once holes are formed in the brick joints, if COG continues to flow into the combustion chamber through the holes during carbonization operation, the flow rate increases, making it difficult for the carbon to remain in the holes.In addition, poor combustion occurs in those areas, causing the temperature of the furnace wall to drop and inhibiting carbon formation in the holes, so the holes tend to open up and the amount of COG passing through increases.

[0024] Furthermore, if the measured CO concentration of the combustion exhaust gas during coal carbonization operation falls below a predetermined control reference value B (for example, the lower limit of the numerical range of CO concentration considered normal: reference line), as shown by the solid line in Figure 3(C), this indicates that excessive carbon has adhered. 3(C), there is no COG supplied to the combustion chamber, and this can be interpreted as a sign of carbon clogging. Therefore, the operating conditions for removing carbon from the coke chamber after the coal carbonization operation are strengthened. These operating conditions are typically the same as those for removing carbon from the coke chamber before the coal carbonization operation. The operating conditions include extending the oxygen-containing gas injection time and / or increasing the amount of oxygen-containing gas injected per unit time so that the measured CO concentration in the combustion exhaust gas during the subsequent coal carbonization operation is equal to or exceeds the control standard value B. The oxygen-containing gas injection time and amount can be adjusted, for example, based on past operational performance. This increases the amount of carbon removed from the joints and furnace walls, increasing the CO concentration in the combustion exhaust gas from the combustion chamber as shown by the dashed line in Figure 3(C), and preventing clogging from occurring.

[0025] The CO concentration of the combustion exhaust gas from the combustion chamber described above can be obtained, for example, by withdrawing the combustion exhaust gas through a pipe and measuring it in the process of being discharged from the combustion chamber as combustion exhaust gas. However, the measurement method is not particularly limited as long as it is possible to identify which combustion chamber the combustion exhaust gas is discharged from. Furthermore, it is preferable to use, for example, the average value of the CO concentration during a single coal carbonization operation spanning several tens of hours as the actual measurement value of the CO concentration of the combustion exhaust gas during coal carbonization operation, and compare this average value with the above-mentioned control reference values ​​A and B. However, for example, the average value can also be the average value of the CO concentration during a specific period of a single coal carbonization operation (e.g., the latter half of the carbonization operation). Alternatively, the measured value of the CO concentration itself can be used as the actual measurement value, and the actual measurement value can be compared with the control reference values ​​A and B based on whether or not this measurement value exceeds the control reference value A or is less than the control reference value B multiple times (one or more times).

[0026] The control standard values ​​can be set for two combustion chambers a and b adjacent to the carbonization chamber, for example, as follows: The control standard value (upper CO concentration limit) of one combustion chamber a is set to CT1, and the control standard value (lower CO concentration limit) is set to CB1, while the control standard value (upper CO concentration limit) of the other combustion chamber b is set to CT2, and the control standard value (lower CO concentration limit) is set to CB2 (CT1>CB1, CT2>CB2). 1) The four control reference values ​​CT1, CT2, CB1, and CB2 are different (i.e., CT1≠CT2 and CB1≠CB2). 2) The two control reference values ​​CT1 and CT2 are the same, and the two control reference values ​​CB1 and CB2 are the same (i.e., CT1 = CT2, and CB1 = CB2). 3) The two control reference values ​​CT1 and CT2 are the same, or the two control reference values ​​CB1 and CB2 are the same (i.e., CT1 = CT2, or CB1 = CB2).

[0027] In setting the control standard value in 1) above, the criteria for comparing the actual measured value of the CO concentration in the combustion exhaust gas during coal carbonization operation with the control standard value are different on both sides of the carbonization chamber, but when the conditions of the control standard value of one of the combustion chambers are met, a decision can be made to shorten or extend the injection time of the oxygen-containing gas, or to decrease or increase the amount of oxygen-containing gas injected per unit time (the same applies to setting the control standard value in 3) above). When setting the control reference values, it is conceivable that the control reference value CT1 of one combustion chamber a may be equal to or less than the control reference value CB2 of the other combustion chamber b (CT1≦CB2), but the inventors have not experienced this. If such a situation occurs, it is advisable for an operator to manually remove the adhering coke. The shortening or lengthening of the oxygen-containing gas blowing time, and the decrease or increase of the amount of oxygen-containing gas blown per unit time can be adjusted based on, for example, past operational results.

[0028] The above-mentioned comparison of the actual measurement value with the control standard value and adjustment of the injection time and injection amount of the oxygen-containing gas can be automatically carried out by, for example, a control unit (computer) of the coke oven facility. Specifically, the CO concentration of the combustion exhaust gas measured during coal carbonization operation after the operation to remove carbon adhering to the coke chamber is transmitted to the control unit continuously or intermittently in real time (sequentially). The control unit performs a preset process on the transmitted CO concentration measurement value, calculates the actual measured value of the CO concentration of the combustion exhaust gas, and compares the actual measured value of the CO concentration of the combustion exhaust gas with the control standard value of the CO concentration of the combustion exhaust gas. The control unit then adjusts the injection time and / or injection amount of the oxygen-containing gas during the operation to remove carbon adhering to the coke chamber after the coal carbonization operation. Note that the injection time and injection amount of the oxygen-containing gas can be adjusted, for example, depending on the deviation between the control standard value of the CO concentration of the combustion exhaust gas obtained based on past operational results and the actual measured value of the CO concentration of the combustion exhaust gas. The above operations can also be performed manually by an operator. [Example]

[0029] Next, examples carried out to confirm the effects of the present invention will be described. <Confirming the effect of preventing jamming> The following clogging occurrence rates were calculated for a certain coke oven. For comparison, the rate of occurrence of clogging caused by carbon over a one-year period using conventional technology (a method in which the carbon adhering to the carbonization chamber is not removed and the adhering carbon is removed manually when clogging occurs; the same applies below) was calculated as a percentage of the number of times. The method described in Patent Document 2 (oxygen-containing gas is blown into the coking chamber, and the blowing of the oxygen-containing gas is stopped when the oxygen concentration of the exhaust gas discharged from the coking chamber reaches a predetermined value; the same applies hereinafter) was carried out for several years, and the occurrence rate of clogging caused by carbon in the last year, when the occurrence of clogging was most effectively suppressed, was calculated as a percentage of the number of times, and the occurrence rate was indexed assuming that the occurrence rate of the above-mentioned conventional technology was 100. The resulting indexed incidence rate was approximately 60. The method of the present invention (CO concentration control in the combustion chamber, the same applies hereinafter) was implemented for two years, and the occurrence rate of clogging caused by carbon in the last year was calculated as a percentage of the number of times, and the occurrence rate was indexed, with the occurrence rate of the above-mentioned conventional technology being set at 100. The resulting indexed incidence rate was approximately 40.

[0030] <Confirmation of effectiveness in preventing black smoke generation> A survey was conducted on the black smoke generation status of a certain coke oven. Since no black smoke was actually generated, the risk of black smoke generation was compared (the CO concentration in the exhaust gas rising to 60 or more, with the concentration at which black smoke is generated being 100). For comparison, the percentage of the number of times that the risk of black smoke generation occurred over a one-year period using conventional technology was calculated. The frequency rate at which the risk of black smoke generation occurred during the period in which the clogging occurrence status was confirmed using the method described in Patent Document 2 was calculated, and the frequency rate was indexed, with the frequency rate for the conventional technology being set at 100. As a result, the indexed frequency ratio was approximately 50. The frequency rate at which the risk of black smoke generation occurred during the period when the clogging occurrence status was confirmed using the method of the present invention was calculated, and the frequency rate was indexed, with the frequency rate for the conventional technology being set at 100. As a result, the indexed frequency ratio was approximately 35.

[0031] From the above, it has been found that according to the present invention, it is possible to leave enough carbon adhering inside the carbonization chamber, particularly in the joints of the carbonization chamber bricks, to stop the flow of COG, and to remove enough carbon adhering to prevent clogging when pushing the carbonized coke out of the carbonization chamber, thereby simultaneously achieving the effects of reducing both the rate of clogging and the rate of black smoke generation (risk of occurrence).

[0032] Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the configurations described in the above embodiments and includes other embodiments and modifications that are conceivable within the scope of the claims. For example, the present invention also falls within the scope of the rights of the present invention when a method for removing carbon from a coke oven chamber is configured by combining some or all of the above embodiments and modifications. In the above embodiment, a set of control reference values ​​representing the upper and lower CO concentration limits is set for each of the combustion chambers on either side of the carbonization chamber, and when the CO concentration exceeds the upper control reference value for at least one of the combustion chambers or falls below the lower control reference value for the CO concentration limit, the injection time and injection amount of oxygen-containing gas during the carbon removal operation are adjusted. However, for example, depending on the conditions of the carbonization chamber and the combustion chamber adjacent to this carbonization chamber, 1) a set of control standard values ​​representing the upper and lower CO concentration limits can be set for only one of the combustion chambers, or 2) only one of the control standard values ​​for the upper and lower CO concentration limits can be set for both adjacent combustion chambers or for one of the combustion chambers, and the injection time and amount of oxygen-containing gas during the carbon deposition removal operation can be adjusted depending on this control standard value. [Explanation of symbols]

[0033] 10: carbonization chamber, 11: carbon incineration lance, 12: coal, 13: charging port, 14: ram beam, 15: coke cake, 16: riser, 17: combustion chamber

Claims

1. 1. A method for removing carbon adhering to a coke oven coke chamber, comprising inserting a lance into the coke chamber to blow in an oxygen-containing gas, and oxidizing and removing the carbon adhering to the coke chamber by using the heat retained in the coke chamber, During coal carbonization operation after performing the operation of removing carbon attached to the carbonization chamber, a CO concentration of combustion exhaust gas passing through a combustion chamber adjacent to the carbonization chamber from which carbon attached has been removed is measured; comparing a preset control standard value of the CO concentration of the combustion exhaust gas from the combustion chamber with an actual measured value of the CO concentration of the measured combustion exhaust gas; A method for removing carbon adhering to a coke oven carbonization chamber, characterized by shortening the injection time of the oxygen-containing gas during the operation of removing carbon adhering to the carbonization chamber after the coal carbonization operation and / or reducing the amount of oxygen-containing gas injected per unit time, on the condition that the actual measured value exceeds the control standard value.

2. 1. A method for removing carbon adhering to a coke oven coke chamber, comprising inserting a lance into the coke chamber to blow in an oxygen-containing gas, and oxidizing and removing the carbon adhering to the coke chamber by using the heat retained in the coke chamber, During coal carbonization operation after performing the operation of removing carbon attached to the carbonization chamber, a CO concentration of combustion exhaust gas passing through a combustion chamber adjacent to the carbonization chamber from which carbon attached has been removed is measured; comparing a preset control standard value of the CO concentration of the combustion exhaust gas from the combustion chamber with an actual measured value of the CO concentration of the measured combustion exhaust gas; A method for removing carbon adhering to a coke oven carbonization chamber, characterized by extending the injection time of the oxygen-containing gas during the operation of removing carbon adhering to the carbonization chamber after the coal carbonization operation and / or increasing the amount of oxygen-containing gas injected per unit time, provided that the actual measured value is less than the control standard value.