JP2015081310A - Method for estimating temperature of carbonized product in chamber type coke oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for accurately estimating the temperature of a carbonized product at the center part in the width direction of a chamber type coke oven, at the site corresponding to a flue with combustion failure.SOLUTION: The method for estimating the temperature of a carbonized product in a chamber type coke oven includes steps of: measuring the flue temperature and the oven wall temperature when cokes are extruded; obtaining the relation between the flue temperature of a flue with combustion failure and a plurality of carbonization chambers adjacent to the flue and the oven wall temperature on the carbonization chamber side at the flue position in advance; estimating the oven temperature on the carbonization chamber side at the flue position from the measured flue temperature of the flue with combustion failure in the actual coke oven based on the relation; obtaining the oven wall temperature on the combustion chamber side at the flue position from the estimated oven wall temperature on the carbonization chamber side; estimating the temperature at the central part in the width direction of the carbonization chamber at the region from the obtained oven wall temperature on the combustion chamber side based on the one-dimensional heat transfer calculation; and obtaining the relation based on the contribution ratio of the heat sneaking from the flue with combustion failure and the neighboring sound flues to the oven wall temperature at the position of the flue with combustion failure.

Description

  The present invention relates to a method for estimating a dry distillation product temperature in a portion adjacent to a combustion chamber having a combustion failure in the furnace length direction in a horizontal chamber coke oven. Here, the dry distillation product is all coke in a region where the dry distillation is healthy, but includes an undry distillation coal layer when the carbonization chamber has an undry distillation region.

In recent coke oven operations, many methods of reducing the moisture content of coal charged into the carbonization chamber with the aim of improving coke productivity and quality have been incorporated, and the coal charging (packing) density has increased. There is a tendency. As a result, when the coke cake is extruded, the load applied to the side wall (furnace wall) of the carbonization chamber increases, and the force required for the coke cake extrusion tends to increase accordingly.
In addition, the number of coke ovens that have been operating for a long period of time and the aging of the furnace bodies is increasing, and the coke extrusion force exceeds the capacity of the extruder, resulting in clogging, and furnace wall bricks during extrusion There is an increased possibility of piercing.

Also, in coke ovens that operate for a long time, as the years of service increase, the frequency of occurrence of combustion chambers that result in poor combustion due to blockage of gas ports that inject fuel gas into the combustion chamber for various reasons such as accumulation of coal powder increases. doing.
The coal in the carbonization chamber is heated from the furnace wall side toward the center in the furnace width direction by heat transfer of combustion heat from the adjacent combustion chamber via the furnace walls on both sides of the carbonization chamber. Combustion chambers are composed of about 30 combustion chambers (hereinafter sometimes referred to as “flues”) subdivided along the furnace length direction of the carbonization chamber. At that point, the amount of heat transfer in the furnace width direction in the carbonization chamber decreases and the temperature rise of the coal is delayed, so there is a region where the temperature at the center of the coke cake furnace width direction is not sufficiently raised during coke extrusion. To do.

  As coal is heated and the temperature rises, it sequentially changes to a coal bed, a softened and melted bed, and a coke bed. Coke cake will be extruded. This undistilled area has a different compression behavior compared to a normally coke layer, and when extruding a coke cake containing an undistilled area, the extruding force is higher than that of a normally coke cake. There's a problem.

  Under such circumstances, extruding the coke cake with a low force not only stabilizes the operation and secures the amount of coke produced, but also reduces the load on the furnace wall of the carbonization chamber and prolongs the furnace body life. It is also very important from the standpoint of the operation, and the extrusion force required to extrude the coke cake from the carbonization chamber is estimated in advance, and operation is performed so that excessive force is not applied to the furnace wall of the extruder or carbonization chamber. It has become more important to do.

  For the estimation of the extrusion force when extruding the coke cake after carbonization from the carbonization chamber, for example, as in the methods disclosed in Patent Documents 1 and 2, a method using the temperature in the carbonization chamber furnace width direction at the time of extrusion is used. It is often used, and it is necessary to accurately estimate this temperature. It is also important to accurately estimate the temperature in the width direction of the coking chamber furnace in order to control the furnace temperature of the coking chamber and suppress the generation of an uncoiled zone.

  As a method of estimating the temperature in the furnace width direction of the coal layer or coke layer in the chamber coke oven carbonization chamber, a method of estimating by heat transfer calculation as disclosed in Patent Document 3 is generally used.

JP-A-8-283730 JP 2008-255299 A JP 58-29883 A

  The combustion chamber of a chamber-type coke oven consists of a large number of flues along the length of the carbonization chamber. When a combustion failure occurs at a specific flue, the amount of heat transfer in the width direction of the furnace inside the carbonization chamber. Decreases.

  The estimation of the temperature in the conventional coking chamber furnace width direction uses the measured value of the flue temperature (usually the temperature at the bottom of the flue) or the temperature obtained by multiplying the measured value by a correction factor as the furnace wall temperature on the flue side. Necessary for estimating the temperature in the furnace width direction in the carbonization chamber by one-dimensional heat transfer calculation as shown in Patent Document 3 based on the temperature, and for extruding the coke cake from the carbonization chamber based on the result. Force (extrusion force) was estimated.

However, when the extrusion force of the coke cake from the carbonization chamber having a poor combustion flue is estimated using the temperature in the furnace width direction estimated by this method, the estimated value becomes significantly larger than the actual extrusion force. It turns out that there is a point.
As described above, in the coke oven that operates for a long time, the flue of poor combustion is increasing, and in such a case, it is necessary to accurately estimate the dry distillation product temperature in the furnace width direction in the carbonization chamber adjacent to the flue with poor combustion. However, conventionally, a technique for estimating the temperature in the furnace width direction in the carbonization chamber when a flue with poor combustion occurs has not been disclosed.

  In view of this, the present invention deals with a flue in a chamber-type coke oven in which a plurality of carbonization chambers and combustion chambers are alternately arranged in the horizontal direction, even when a specific flue in the combustion chamber has poor combustion. It is an object of the present invention to provide a method for accurately estimating the temperature in the furnace width direction in the carbonization chamber at a location.

  As a result of earnest study on the method of correctly estimating the temperature in the width direction of the carbonization chamber furnace of the carbonized product having a non-distilled region at the center by coke produced due to the defective combustion flue, Paying attention to the heat circulated from the adjacent healthy flue, and calculating the heat transfer in consideration of this heat quantity, the accuracy of estimating the temperature in the furnace width direction in the carbonization chamber at the location corresponding to the flue is improved. Based on this finding, the present invention has been completed.

  That is, in the present invention, based on the flue temperature that can be measured and the furnace wall temperature on the carbonization chamber side during coke cake extrusion, the furnace wall temperature on the carbonization chamber side of the poor combustion flue can be estimated from the measured flue temperature. The furnace wall temperature on the flue side can be obtained from the furnace wall temperature on the carbonization chamber side in consideration of the amount of heat circulated.

  Furthermore, when estimating the furnace wall temperature on the side of the carbonization chamber, the ratio of the heat circulated (contribution rate) from the sound flue adjacent to the defective flue is given by a normal distribution with respect to the adjacent flue position with the defective flue as the center. And found that it can be estimated more accurately.

The gist of the present invention thus made is as follows.
[1] A method of estimating a dry distillation product temperature in a carbonization chamber furnace width direction at the time of coke extrusion in a chamber type coke oven,
Measure the flue temperature of the combustion chamber and the furnace wall temperature on the carbonization chamber side during coke extrusion, and the flue temperature of the combustion chamber with poor combustion, the flue temperatures of the multiple healthy combustion chambers adjacent to the combustion chamber, and The relationship with the furnace wall temperature on the carbonization chamber side corresponding to the combustion chamber is obtained in advance,
Based on the relationship from the measured values of the flue temperature of the combustion chamber of the actual coke oven where combustion is poor and the flue temperatures of a plurality of healthy combustion chambers adjacent to the combustion chamber, the furnace wall temperature on the side of the carbonization chamber corresponding to the flue To estimate
From the estimated furnace wall temperature on the carbonization chamber side, the furnace wall temperature on the combustion chamber side with poor combustion is obtained, and the carbonization corresponding to the combustion chamber is calculated by one-dimensional heat transfer calculation from the obtained furnace wall temperature on the combustion chamber side. Estimate the temperature in the furnace width direction of the dry distillation product of the chamber,
Further, as the relation, the furnace wall temperature on the carbonization chamber side corresponding to the combustion chamber with poor combustion is obtained based on the contribution ratio of heat from the combustion chamber with poor combustion and the adjacent healthy combustion chamber. Estimation method of dry distillation product temperature in a room type coke oven.

[2] The method for estimating a dry distillation product temperature in a chamber coke oven according to [1], wherein the relationship is obtained as the following equation (1).
Tt (n) = a * Tf (n) + b * [Tf (n + 1) + Tf (n-1)] + c * [Tf (n + 2) + Tf (n-2)] + d * [Tf (n + 3) +
Tf (n-3)]-[Average of all flue temperatures (actual)-Average of all furnace wall temperatures (actual)]
... (1)
Here, the furnace wall of the carbonization chamber is divided in the furnace length direction in units of combustion chambers, and a combustion chamber having poor combustion is defined as n, and a healthy combustion chamber adjacent to the combustion chamber is sequentially separated from the combustion chamber toward the PS direction. −1, n−2,..., N + 1, n + 2,... In order toward the CS direction, and Tt (n) is the carbonization chamber side furnace wall temperature corresponding to the combustion chamber n, Tf (n), Tf (nx ), Tf (n + x) is the temperature of each adjacent healthy combustion chamber (X is 1 to 3), and a, b, c, d are from the combustion chamber with poor combustion and the adjacent healthy combustion chamber. Is a coefficient indicating the contribution ratio (%) of heat, a + 2b + 2c + 2d = 100%, and a>b>c>d> 0.
[3] The method for estimating a dry distillation product temperature in a chamber coke oven according to [2], wherein a, b, c, and d are given in a normal distribution.

  Here, the incomplete combustion flue means a flue having a flue temperature of less than 1100 ° C., and the healthy flue means a flue having a temperature of 1100 ° C. or higher. When the flue temperature is 1100 ° C. or higher, there is hardly any non-dry distillation zone that increases the extrusion force when the coke cake is discharged from the carbonization chamber after the dry distillation.

According to the present invention, even when a combustion failure occurs in the combustion chamber of the chamber coke oven, the temperature in the carbonization chamber furnace width direction of the dry distillation product can be accurately estimated.
As a result, over-action such as overdose of heat is prevented and the accuracy of estimating the force required for coke extrusion is improved, so that the operating conditions of the coke oven and the properties of the charging coal can be managed more appropriately. Therefore, the occurrence of clogging can be prevented and the life of the coke oven can be extended.

It is a figure which shows an example of the temperature distribution of the furnace length direction in a coke oven. It is a conceptual diagram for demonstrating the contribution ratio of the heat | fever surrounding from the healthy flue to a combustion failure site | part. It is a figure which shows an example of the normal distribution for calculating | requiring the wraparound contribution rate of the heat from a healthy flue. It is a figure for demonstrating the calculation process of the heat wraparound contribution rate from a healthy flue. It is a figure which shows the relationship between the setting time after dry distillation, and the heat | fever wraparound ratio (contribution rate) from the healthy flue adjacent to a combustion failure flue. The following shows the result of comparing the extrusion force estimated using the carbonization product temperature estimated based on the furnace wall temperature on the carbonization chamber side, considering the amount of heat circulated, with the actual value of the extrusion force in the actual coke oven. FIG. For the measured flue temperature, the center temperature in the furnace width direction of the dry distillation product estimated based on the furnace wall temperature on the side of the carbonization chamber obtained by considering the amount of heat circulated and the amount of heat circulated are not considered. It is a figure which compares and shows the furnace width direction center temperature of the dry distillation product estimated in (2).

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[Examination of heat circulated from the healthy flue to the defective combustion site]
The coal charged into the carbonization chamber of the chamber coke oven is supplied with heat from the combustion chamber, and the temperature rises sequentially from the coal on the furnace wall side of the carbonization chamber. Even if the combustion chamber was in a poorly burned state, it was considered that it would be affected by the heat conduction around the furnace wall located in the adjacent healthy flue.
Therefore, in order to know the degree of the fall of the furnace wall temperature due to the defective combustion flue, in the coke oven with the defective combustion flue, the temperature of each flue and the temperature of the furnace wall surface on the carbonization chamber side were measured.

  In the operation of the coke oven, the center temperature in the width direction of the coking chamber reaches a temperature of 1000 ° C or higher, and after the fire has dropped, the coke cake is put on the ram of the extruder after a predetermined time has elapsed. Extrude. Therefore, the flue temperature during extrusion and the temperature of the furnace wall surface of the carbonization chamber during extrusion were measured. The temperature of the furnace wall surface was measured by a temperature measuring device attached to the ram beam.

The results of measuring the temperature in the length direction of the coke oven are shown in FIG. It was confirmed that the amount of dropping of the furnace wall temperature (about 100 ° C.) in the coking chamber was smaller than the amount of dropping of the flue temperature (about 200 ° C.) in the case of the defective combustion flue.
That is, the difference in the drop amount between the flue temperature and the furnace wall temperature tended to decrease as the flue temperature was lower. This is thought to be due to the influence of heat from the healthy part (heat transfer in the furnace length direction).

[Estimation of the furnace wall temperature on the side of the carbonization chamber taking into account the heat flow from the adjacent healthy flue]
Next, the effect of the heat from the unsuccessful flue and the sound flue adjacent to the unsatisfactory flue on the furnace wall temperature on the carbonization chamber side of the unsatisfactory flue was examined.
As shown in FIG. 2, the furnace wall of the carbonization chamber is divided in the direction of the furnace length in units of one flue, and the combustion defective flue is defined as n, and the healthy flue adjacent to the flue is taken from there PS (extruder side). ) In the order toward n), n-2,..., And CS (guide vehicle side) in the order n + 1, n + 2,. In addition to direct heat conduction from n, it is considered that the furnace wall temperature rises due to heat circulated from adjacent healthy flues n + 3 to n-3 having a high temperature.

For this reason, it is necessary to obtain the furnace wall temperature on the carbonization chamber side at the defective combustion flue position by adding the heat from the defective combustion flue n and the heat from the adjacent healthy flues n + 3 to n-3.
Therefore, set the contribution ratio of heat from the defective combustion flue and the contribution ratio of heat from the adjacent healthy flue to the furnace wall temperature on the carbonization chamber side at the defective combustion flue position, and based on each contribution ratio The temperature based on each flue was obtained, and the temperatures were added to obtain the furnace wall temperature on the carbonization chamber side.

That is, the temperature of each flue is defined as Tf (n-3),..., Tf (n),..., Tf (n + 3), and the contribution ratio of heat to the temperature of the furnace wall located at the defective flue (%) 2), as shown in FIG. 2, the defective combustion flue was set as a, and b, c, and d were set in order of flues close to it.
Then, the furnace wall temperature Tt (n) on the carbonization chamber side at the flue position where there is a combustion failure is expressed by the following equation (1).
Tt (n) = a * Tf (n) + b * [Tf (n + 1) + Tf (n-1)] + c * [Tf (n + 2) + Tf (n-2)] + d * [Tf (n + 3) +
Tf (n-3)]-[Average of all flue temperatures (actual)-Average of all furnace wall temperatures (actual)]
... (1)
Note that a + 2b + 2c + 2d = 100%, and the flue closer to the incomplete combustion flue has a larger contribution ratio of heat circulation (that is, a>b>c>d> 0).

Here, the contribution ratios a, b, c, and d are obtained as follows.
The defective combustion flue n is specified based on the flue temperature measured as described above, and provisional contribution ratios a to d of the flue n and the flues n + 3 to n-3 adjacent thereto are set. As shown in FIG. 3, the contribution rate follows a normal distribution centered on the defective combustion flue n, and the standard deviation (σ value) is set to an arbitrary value to obtain provisional contribution rates a to d. Then, each of the flue temperatures and the contribution rate values are input to the above equation (1) to calculate a temporary estimated value Tt of the coking chamber side furnace wall temperature.
Next, the difference between the actual furnace wall temperature measured on the carbonization chamber as described above and the estimated furnace wall temperature calculated as described above is squared, and the sum of squares of the differences is obtained for all the flues. Next, this operation is repeated while changing the set value of the standard deviation, and the contribution ratios a to d that minimize the square sum of the differences are searched.
FIG. 4 is a table showing an example of the estimation of the carbonization chamber side furnace wall temperature.

  Since the temperature of a flue furnace wall with poor combustion rises due to heat conduction from the furnace wall of an adjacent healthy flue even after a fire has dropped, the standard of normal distribution for determining the contribution ratios a, b, c, d Deviation varies with placement time. FIG. 5 shows an example of the relationship between the standard deviation of the contribution rate distribution and the placement time.

  By the way, when there is a continuous flue failure flue, it is considered that heat wraps from a flue with a higher temperature to a flue with a lower temperature, and the same handling as described above can be performed.

[Estimation of the temperature in the width direction of the coking chamber furnace considering the heat wraparound in the actual furnace]
In the actual coke oven, the temperature in the carbonization chamber width direction of the carbonized product is estimated by the following procedure.
1) The flue temperature Tf is measured, and the furnace wall temperature Tt on the carbonization chamber side is estimated from the above equation (1) based on the actual measurement value.
2) The furnace wall temperature Tw on the combustion chamber side is estimated from the furnace wall temperature Tt on the carbonization chamber side.
3) The temperature (distribution) of the carbonization chamber in the carbonization chamber furnace width direction is estimated from the furnace wall temperature Tw on the combustion chamber side.

Each step will be described below.
1) Estimation of the furnace wall temperature Tt on the side of the carbonization chamber Measure the temperature Tf of each flue in the combustion chamber of the actual coke oven with a radiation thermometer, and based on the actual measurement, Thus, the furnace wall temperature Tt on the carbonization chamber side in consideration of heat wraparound is estimated.

2) Estimation of the combustion chamber side furnace wall temperature Tw In the estimation of the combustion chamber side furnace wall temperature Tw from the carbonization chamber side furnace wall temperature Tt, actual operation data was analyzed. It was found that in addition to the furnace wall temperature Tt on the carbonization chamber side, the influence of the carbonization time t is large, and further, the charging water content and the charging coal temperature also affect the charging coal conditions.
Therefore, in order to estimate the furnace wall temperature Tw on the combustion chamber side from the furnace wall temperature Tt on the carbonization chamber side, factors for the furnace wall temperature Tw on the combustion chamber side (the furnace wall temperature Tt on the carbonization chamber side, the charging coal) The degree of influence of each of the water content and the charging coal temperature) may be experimentally obtained and converted into a database, and estimation may be made based on this database. Alternatively, the correlation between the furnace wall temperature Tw on the combustion chamber side and each factor (the furnace wall temperature Tt on the carbonization chamber side, the charging coal moisture, the charging coal temperature) is constructed as a correlation equation, and this correlation equation You may estimate based on.

3) Estimation of dry distillation product temperature (distribution) The estimation in 3) is based on the furnace wall temperature Tw on the combustion chamber side, the furnace body conditions of the coke oven (thickness of furnace wall brick, thermal conductivity, etc.) It can be calculated by performing heat transfer calculation using charging conditions (charging density, moisture, etc.) (see, for example, Fuji Steel Technical Report, 17, 353, issued in 1968).

[Estimation of extrusion load considering heat wraparound]
Based on the temperature of the carbonized product obtained as described above, the force required to extrude the coke cake after carbonization from the carbonization chamber is estimated as follows.
(I) First, for each blended coal to be used, a coke cake extrusion test as described in Patent Documents 1 and 2 is performed, and the pressure at which the coke is extruded by the extruder is converted to a pressure that pushes the furnace wall. The Rankine coefficient k defined by the ratio (furnace wall pressing pressure / extrusion pressure) is determined in advance in relation to the gap amount X between the coke cake and the carbonization chamber furnace wall.

  (Ii) Measure the temperature of each flue in the actual furnace with a radiation thermometer. The furnace wall of the carbonization chamber is divided into units of 1 flue in the furnace length direction, and the furnace wall temperature Tt (n) on the carbonization chamber side is calculated from the measured value of the flue temperature for each of the divided furnace walls using the above equation (1). ), The furnace wall temperature Tw (n) on the flue side is obtained from the furnace wall temperature Tt (n) and the carbonization time t, and the temperature distribution of the dry distillation product for each divided unit is obtained from the furnace wall temperature Tw (n). Is obtained by one-dimensional heat transfer calculation.

(Iii) Coke shrinkage (burn-out amount) is determined from the furnace width direction temperature distribution of the dry distillation product based on the methods described in Patent Documents 1 and 2, and the coke after dry distillation is calculated based on the obtained coke shrinkage. The gap X between the cake and the furnace wall is calculated, and the Rankine coefficient k (n) is obtained for each divided region by using the relationship between the Rankine coefficient k and X previously obtained by the method (i).
(Iv) Using the Rankine coefficient k (n) obtained for each region, the extrusion pressure P (n) of each region is determined in Patent Literature 1 and academic literature (Year-Book of the coke oven manager's association, 1979). (Year, page 213), and the total extrusion pressure Pt is obtained by adding them. Then, Pt is multiplied by the cross-sectional area (W × H) of the coke cake to obtain the extrusion force (F) of the coke cake.

In order to confirm the effectiveness of the method of obtaining the carbonization product temperature of the present invention as described above, the actual value and the estimated value of the coke extrusion force were compared in the operation of the actual coke oven.
The actual value of the coke pushing force was calculated from the indicated value of the torque meter attached to the extruder motor. The estimated value of the coke extrusion force is the Rankine coefficient determined based on the above-mentioned methods (ii) and (iii), using the temperature of the dry distillation product obtained in consideration of the heat wrapping around the defective combustion flue. Was estimated by the above method (iv).
The results are indicated by ◇ in FIG. 6. The positions of ◇ are distributed in a large amount on or near the line indicating the coincidence between the actual extrusion force and the estimated extrusion force. It was confirmed that there was a good correspondence between the extrusion force estimated by using and the extrusion force actually measured in the actual coke oven.

Further, in the carbonization chamber where there is a large drop in the flue temperature, an estimated value of the dry distillation product temperature by the method of the present invention (with consideration of heat wraparound) and a one-dimensional method disclosed in Patent Document 3 as a conventional method Fig. 7 shows the estimated value of dry distillation product temperature (without consideration of heat wraparound m) by heat transfer calculation (method not considering heat wraparound), and is estimated using the dry distillation product temperature according to the method of the present invention. The pushing force that was calculated using ● and the pushing force that was estimated using the temperature of the dry distillation product according to the conventional method was shown by ○, and is also shown in FIG.
When heat circulation from the healthy flue is not taken into account, the dry distillation product temperature is evaluated to be lower than the actual value at the defective combustion point, and thus the estimated extrusion load is higher than the actual measurement value.
On the other hand, in the case where the extrusion load is estimated from the dry distillation product temperature estimated in consideration of the wraparound of heat based on the present invention, such problems are eliminated, and the extrusion load estimation accuracy is high. It was confirmed that it improved.

Claims (3)

A method of estimating a carbonization product temperature in the width direction of a carbonization chamber at the time of coke extrusion in a chamber type coke oven,
Measure the flue temperature of the combustion chamber and the furnace wall temperature on the carbonization chamber side during coke extrusion, and the flue temperature of the combustion chamber with poor combustion, the flue temperatures of the multiple healthy combustion chambers adjacent to the combustion chamber, and The relationship with the furnace wall temperature on the carbonization chamber side corresponding to the combustion chamber is obtained in advance,
Based on the relationship from the measured values of the flue temperature of the combustion chamber of the actual coke oven where combustion is poor and the flue temperatures of a plurality of healthy combustion chambers adjacent to the combustion chamber, the furnace wall temperature on the side of the carbonization chamber corresponding to the flue To estimate
From the estimated furnace wall temperature on the carbonization chamber side, the furnace wall temperature on the combustion chamber side with poor combustion is obtained, and the carbonization corresponding to the combustion chamber is calculated by one-dimensional heat transfer calculation from the obtained furnace wall temperature on the combustion chamber side. Estimate the temperature in the furnace width direction of the dry distillation product of the chamber,
Further, as the relation, the furnace wall temperature on the carbonization chamber side corresponding to the combustion chamber with poor combustion is obtained based on the contribution ratio of heat from the combustion chamber with poor combustion and the adjacent healthy combustion chamber. Estimation method of dry distillation product temperature in a room type coke oven. The said relationship is calculated | required as following (1) Formula, The estimation method of the dry distillation product temperature in the chamber type coke oven of Claim 1 characterized by the above-mentioned.
Tt (n) = a * Tf (n) + b * [Tf (n + 1) + Tf (n-1)] + c * [Tf (n + 2) + Tf (n-2)] + d * [Tf (n + 3) +
Tf (n-3)]-[Average of all flue temperatures (actual)-Average of all furnace wall temperatures (actual)]
... (1)
Here, the furnace wall of the carbonization chamber is divided in the furnace length direction in units of combustion chambers, and a combustion chamber having poor combustion is defined as n, and a healthy combustion chamber adjacent to the combustion chamber is sequentially separated from the combustion chamber toward the PS direction. −1, n−2,..., N + 1, n + 2,... In order toward the CS direction, and Tt (n) is the carbonization chamber side furnace wall temperature corresponding to the combustion chamber n, Tf (n), Tf (nx ), Tf (n + x) is the temperature of each adjacent healthy combustion chamber (X is 1 to 3), and a, b, c, d are from the combustion chamber with poor combustion and the adjacent healthy combustion chamber. Is a coefficient indicating the contribution ratio (%) of heat, a + 2b + 2c + 2d = 100%, and a>b>c>d> 0.   3. The method for estimating a dry distillation product temperature in a chamber coke oven according to claim 2, wherein the contribution ratios a, b, c, and d are given in a normal distribution.

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