JPH08134458A - Method for judging abnormality on wall surface of coke oven chamber - Google Patents

Abstract

PURPOSE: To confirm the occurrence of abnormality, such as roughening or carbon deposition, on the wall surface of a coke oven chamber at an early stage to properly deal with the matter. CONSTITUTION: An actual carbonization data base is established by detecting the variation in pushing resistance as the change in power consumption of a ram-driving motor at every cycle of carbonization of coal for coke making over the whole time of pushing out of coke cake with a pushing ram. Abnormality on the wall surface of a coke oven chamber is judged by displaying, from the actual carbonization data, the change in the past average power consumption and the change in the latest power consumption or the latest average power consumption and analyzing by comparing those changes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of determining a wall surface abnormality of a coking oven in a coke oven in which coking coal is produced by dry-distilling a coking coal having a required grade composition in the carbonization chamber.

[0002]

Generally, this type of coke oven, or
As for the operation of a coke oven in which a large number of carbonization chambers (kilns) for the dry distillation treatment of coking coal are arranged side by side in the furnace length direction, as is well known, first of all, the charging vehicle is Using, the raw material coal with the required composition is charged into the carbonization chamber, and the dry distillation treatment of the raw material coal is executed as expected,
Next, after the completion of the dry distillation treatment, the extruding ram of the extruder is driven to gradually extrude the dry-distilled raw material coal in the carbonization chamber, so-called coke cake, from one kiln end side toward the other kiln end side ( The coke cake is transferred to the fire extinguisher via the guide car by the kiln removal, and then the coke cake transferred to the fire extinguisher is extinguished to produce the desired coke. In each of the carbonization chambers constituting the coke oven, the operations of charging the raw coal by the above charging vehicle, dry-distilling the raw coal, and extruding the coke cake that has been dry-distilled by an extruder Each cycle is repeated.

Thus, in the carbonization chamber, as the carbonization treatment of the raw material coal is repeated many times in each predetermined carbonization cycle, the fire-resistant wall surface forming the carbonization chamber is damaged. Roughness of the wall based on the so-called rough skin,
Alternatively, if carbon adheres to the wall surface, the carbonization function of the carbonization chamber itself deteriorates, so it is necessary to constantly monitor the conditions such as skin roughness and carbon adhesion.

Therefore, in the conventional case, when the former fire-resistant wall surface is roughened, the corresponding portion of the fire-resistant wall surface is repaired, and when carbon is adhered to the latter fire-resistant wall surface, the adhered carbon is removed. Taking measures such as incineration anew, on the other hand, for the detection of the surface roughness of these wall surfaces in the carbonization chamber, the detection of functional deterioration such as carbon adhesion, usually, when the coke cake is extruded by the extrusion ram of the extruder, Monitoring the variation of the extrusion load applied to the extrusion ram, that is, here
By observing and monitoring the transition of the power consumption of the ram drive motor, which is the drive source of the extrusion ram, the state of the carbonization chamber is grasped as a whole.

[0005]

However, in the above-mentioned conventional method for detecting the deterioration of the carbonization function caused by the rough skin on the wall surface of the carbonization chamber, the adhesion of carbon, etc., it is necessary to detect the overall deterioration of the function of the carbonization chamber. However, it is relatively difficult to take appropriate measures for this because it is not possible to confirm specific skin roughness, carbon adhesion, etc. The present situation is that the worker empirically determines the reduction of the carbonization function from the change of the consumption amount and takes the corresponding measures.

Further, the power consumption of the ram drive motor obtained by the conventional detection method corresponds only to the transition of power during the elapsed time of extrusion from the start to the end of the extrusion of the coke cake in the extruder. However, since the power required to drive the extrusion ram is not only affected by the roughness of the fire-resistant wall surface, carbon deposition, etc., it is not always possible to make an accurate judgment by only considering the transition of the power consumption. There was a problem that I could not do it.

The present invention has been made in view of such a conventional situation.
It was made to solve these problems, and the purpose is to check the occurrence of abnormalities such as roughening of the refractory wall surface in the carbonization chamber of the coke oven and carbon adhesion at an early stage, and take appropriate measures. In this way, it is possible to provide a method for determining an abnormality of the wall surface of the coke chamber of the coke oven, which makes it possible to always maintain the carbonization function of the carbonization chamber in a good state.

[0008]

In order to achieve the above-mentioned object, a method for determining abnormality of a wall of a coke oven carbonization chamber according to the present invention is a coking coal having a required mix of brands in a carbonization chamber (kiln) of a coke oven. To obtain a coke cake by subjecting the charged raw material carbon to a carbonization treatment, and then extruding (kneading) the coke cake, from one kiln end side of the carbonization chamber to the other kiln end side. In the meantime, when operating the extrusion ram of the extruder, a method of analyzing the fluctuation of the kiln resistance loaded on the extrusion ram to determine an abnormality of the carbonization chamber wall surface, For each dry distillation treatment cycle of the raw coal, the fluctuation of the kiln removal resistance is changed over the entire kiln elapsing time from the start of the kiln removal of the coke cake by the extrusion ram to the end of the kiln removal of the power consumption of the ram drive motor. Detected as a transition And change detection data collection process for collecting,
For the fluctuation detection data of the power consumption for each dry distillation processing cycle collected in the fluctuation detection data collection process, this is sequentially accumulated in a storage device together with the respective kiln elapse time, and the kiln elapse time is calculated. The past average power consumption calculated from the dry distillation performance database creation process that creates the dry distillation performance database based on the fluctuation detection data of the included power consumption and each dry distillation performance data of at least a plurality of dry distillation treatment cycles obtained in the dry distillation performance database creation process. Change in quantity,
And the latest power consumption of the latest carbonization treatment cycle,
Alternatively, including a dry distillation performance data display process for displaying on the screen of the display device each of the transition of the latest average power consumption calculated from the dry distillation performance data of several dry distillation treatment cycles immediately before the latest, of the display device, The transition of the average power consumption displayed on the screen and the transition of the latest power consumption or the transition of the latest average power consumption are compared and analyzed, and the difference between these two power consumptions causes It is characterized by determining abnormality.

[0009]

Therefore, in the method of the present invention, the carbonization results of the respective charging carbonaceous materials are repeatedly managed in accordance with the carbonization treatment of the charged raw material coal which is repeatedly executed in the respective carbonization chambers (kilns) of the coke oven.
Fluctuation data of the power consumption including the kiln elapse time by the extrusion ram of the extruder for each dry distillation treatment cycle is detected, and at least a plurality of each of the dry distillation actual result data created based on the detected fluctuation data Changes in the past average power consumption calculated from the actual dry-distillation process data for each dry-distillation treatment cycle, and the latest power-consumption changes in the latest dry-distillation treatment cycle, or each dry-distillation actual data for the last several previous dry-distillation treatment cycles By comparing and analyzing the transition of the latest average power consumption calculated from, the wall abnormality of the carbonization chamber is determined.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for determining an abnormality of a coke oven carbonization chamber wall surface according to the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a schematic sectional view showing the outline of a coke oven facility to which an embodiment of the present invention is applied, and FIG. 2 is an embodiment of the present invention. Fig. 3 is a block diagram showing the outline of the method for determining the abnormality of the coke oven carbonization chamber wall surface, and Fig. 3 shows the flow from the collection and analysis of each carbonization result data of the method for determining the abnormality of the coke oven carbonization chamber wall surface. It is a block diagram.

First, in the coke oven facility shown in FIG. 1, the coke oven 10 is constructed by refractory construction of a large number of carbonization chambers (kilns) 11 to be judged by the method of the present embodiment in a state in which they are arranged side by side in the furnace length direction. For each of the respective carbonization chambers 11, each auxiliary facility that can be controlled to travel on each rail (not shown) that is laid orthogonally to the juxtaposed direction,
That is, in this case, the charging vehicle 12, the extruder 13, which is the core of the application of the method of the present embodiment, the guide wheel 14, and the fire extinguisher vehicle 15 are arranged.

Here, the charging vehicle 12 is arranged so that the upper side of each of the carbonization chambers 11 constituting the coke oven can be connected in series to perform controlled travel, and each of the carbonization chambers 1 can be controlled.
As is well known, a raw material coal having a required composition is charged into the inside of the No. 1, and in each of the carbonization chambers 11, the raw material coal charged inside is subjected to dry distillation as expected.

Further, the extruder 13 is arranged so that one kiln end 11a side of each of the carbonization chambers 11 is connected in series so as to allow controlled traveling, and a ram drive motor 13a.
The extrusion ram 13b is driven and controlled by the extrusion ram 13b. By the extrusion operation of the extrusion ram 13b, the coke cake subjected to the carbonization treatment in each of the carbonization chambers 11 from one kiln end 11a side to the other kiln end 11b. Push towards the side.

Further, the guide wheel 14 and the fire extinguishing wheel 15 are sequentially arranged so that the other kiln end 11b side of each of the carbonization chambers 11 is connected in series so as to be able to respectively control-run and to be extruded. The coke cake extruded by the extruding ram 13b of the machine 13 is guided by the guide wheel 14 and transferred onto the fire extinguisher wheel 15, and then the coke cake transferred onto the fire extinguisher wheel 15 is extinguished in a known manner. It is processed to produce the desired coke.

As described above, the method according to the present embodiment is applied to the coke oven facility having the above-mentioned structure, and one of the carbonization chambers 11 is used to detect the abnormality of the refractory wall surface of each carbonization chamber 11. From the side of the kiln end 11a to the side of the other kiln end 11b, when operating the extrusion ram 13b of the extruder 13, due to fluctuations in the kiln ejection resistance loaded on the extrusion ram 13b, this is controlled by the ram drive motor. Data is detected by the fluctuation of the power consumption of 13a (hereinafter, also simply referred to as the kiln power), and the judgment is made by analyzing from the detected fluctuation data.

Next, an example of means for detecting fluctuation data of the power consumption of the ram drive motor 13a and determining the fire wall surface abnormality of the carbonization chamber 11 by analyzing the fluctuation data will be described in detail.

With reference to FIGS. 2 and 3, in the present example, each system for collecting and analyzing data on the power consumption from the kiln is constructed and operated as follows.

First of all, as shown in FIG.
For each dry distillation treatment cycle, the fluctuation of the kiln discharge resistance from the start to the end of the kiln removal by the extrusion ram 13b of the coke (coke cake) was measured by the ram drive motor 13a.
Measured and collected according to the kiln power consumption data. That is, here, it is the extrusion ram power consumption measurement 21 when the coke kiln is taken out, and the power consumption collection 22 at that time.

Then, the power consumption collection 22 sets the first personal computer (personal computer) 23 mounted on the extruder 13 in the collection mode and executes it to activate the desired data collection system A.

Therefore, here, in the kiln discharging operation,
The value of the extrusion load of the extrusion ram 13b is collected as the kiln power consumption consumed from the start of extrusion of coke cake to the end of extrusion for the amount of extrusion load applied to the ram drive motor 13a. The power consumption data over the entire elapsed time of the output operation is input to the first personal computer 23, and is stored and stored on the HD (hard disk) of the storage device and, if necessary, on the FD (floppy disk).

Regarding the collection of the electric power consumption data, in this case, for example, one corresponding to 60 dry distillation treatment cycles for each of the carbonization chambers 11, in other words, the past 60 latest equivalents. The data shall be stored and accumulated, and the power consumption data that exceeds the 60 dry distillation treatment cycles shall be updated sequentially, leaving the latest information.

Further, in displaying the power consumption data,
For example, without using a high-speed chart or the like, as will be described later, by switching from the data collection mode to the data analysis mode on the personal computer side, several preset types on the CRT as the display device can be set. The display is made to correspond to the required display type selected according to the purpose of analysis.

If necessary, the collected data stored on the HD is transferred so that the collected data can be called and analyzed at any time and at any place using the same type of personal computer. It is also possible to connect a printer to the personal computer and output each display data individually, and further, for example, required partial data using the FD (for example, for each carbonization chamber (kiln),
By inputting the accumulated average value of the power used for each dry distillation cycle, etc.) to the actual results of the dry distillation, the true kiln with corrections for changes in raw coal properties, GCT (gross coking time), firing temperature, kiln output power, etc. It is preferable to calculate the output power consumption amount to enable quantitative and aged data file management.

Next, the power consumption data for each dry distillation processing cycle collected in the data collection system A is not directly related to the data analysis system B in the next stage and this embodiment, so the details thereof will be described. Although not described, it is sent to another data collection system C as necessary.

In the data analysis system B, the first personal computer 23 mounted on the extruder 13 and / or the second personal computer 24 installed in a management office or the like are set in the analysis mode, and In addition to accepting the kiln-generated power consumption data for each dry distillation treatment cycle,
In this case, by using the personal computer 23 and / or the second personal computer 24, the graph of the transition of the kiln output power, the graph of the transition of the kiln output power integrated average value, and the graph of the kiln output power integrated value list By carrying out an analysis such as conversion, the occurrence of the wall surface abnormality of each target carbonization chamber 11, that is, the rough surface of the wall surface, the adhesion of carbon, etc. is determined.

Further, in the data analysis system B, in the graphing of the electric power transition and the like, the transition of the electric power consumption of the kiln discharge for each of the carbonization chambers 11 and for each of the carbonization treatment cycles is shown together with the elapsed time of extrusion. Since the transition of the electric power waveform represents the transition of the friction resistance between the coke cake and the carbonization chamber wall surface by displaying it as a power waveform, the surface of the carbonization chamber wall is roughened, and abnormalities such as carbon adhesion are searched for. Can be done easily.

On the other hand, in parallel with the elapsed time of the electric power waveform, the position of the carbonization chamber 11 in the furnace length direction and the extrusion ram 13b are previously set.
If it is taken into consideration that the relationship with the operating position of can be grasped in advance as position data, it is also possible to confirm the abnormal position on the wall of the carbonization chamber. It can be easily developed to search for an accurate repair position.

If the collected data of each of the latest 60 dry distillation treatment cycles described above is used so that the data can be overwritten and displayed arbitrarily, the power waveforms before and after the repair are overwritten so that the data after the repair is completed. The repair effect can be clearly and easily confirmed.

Further, the increase of the extrusion resistance due to the narrowing of the room due to the carbon adhering to the wall surface of the carbonization chamber leads to the rise of the power waveform in one aspect. Therefore, the change of the power waveform causes a change in the wall surface of the carbonization chamber. The state of carbon adhesion can be easily known.

Here again, similarly to the above, the relationship between the furnace lengthwise position of the carbonization chamber 11 and the operating position of the extrusion ram 13b can be grasped in advance as position data, so that the carbonization chamber wall surface can be grasped. It is also possible to confirm the degree of carbon adhesion, the position of carbon adhesion, etc., so that accurate carbon incineration can be achieved, and confirmation after the carbon incineration can also be done by overwriting the waveform before and after incineration. The effect can be clearly and easily confirmed.

When the coke cake is extruded by the extruding ram 13b, when the coke cake is extruded by the extruding ram 13b, the coke cake of the coke cake is compressed at the beginning of the extrusion. Since the operating time within a specific range centered on the movement start time is most conspicuously expressed by the extrusion resistance, the integrated average value of power consumption at this time, that is, the average integrated power consumption value within the specific operating time Is calculated and collected, and the average power consumption integrated value obtained in this way is corrected with a reference value that considers the degree of influence due to changes in the properties of raw coal, GCT, firing temperature, kiln output power, etc., The refractory wall surface of the carbonization chamber 11 is calculated by comparing and calculating the transition of the corrected average power consumption integrated value and the transition of the reference average power consumption integrated value that is previously determined for each carbonization chamber 11. The transition of the frictional resistance between the coke cake can know each carbonization treatment cycle.

Therefore, from the above, it is possible to grasp the progress of deterioration of the carbonization chamber wall surface of each carbonization chamber 11 and the adhesion state of carbon, and as a result, the time for the timely repairing of the wall surface of the carbonization chamber 11 , And the timing of incineration of adhered carbon can be effectively planned.

Furthermore, in the graphing of the average power consumption integrated value in the data analysis system B, calculation after correction or before correction based on the above-mentioned raw material coal properties, GCT, firing temperature, kiln discharge power value, etc. Display the processed average power consumption integrated value and the power consumption value of the latest dry distillation processing cycle, or the average processed integrated power consumption value of each of the multiple dry distillation processing cycles immediately before the latest, on the display device. At the same time, by comparing the difference between these respective values, the latest carbonization chamber or each carbonization chamber 1 over the last few times
It is possible to estimate the latent transition of the extrusion resistance inherent to each carbonization chamber 11 according to the wall surface condition of each one, and as a result, it is possible to reduce the extrusion resistance with respect to the wall abnormality degree in each carbonization chamber 11. Can be used as a guideline for determining the necessity of observing inside the furnace and can be effectively utilized.

[0035]

As described above in detail with reference to the embodiments,
According to the method of the present invention, for each dry distillation treatment cycle of the raw coal in the carbonization chamber, the fluctuation of the kiln resistance over the entire kiln elapse time from the kiln start to the kiln end of the coke cake by the extrusion ram is driven by the ram. It detects and collects as a transition of the power consumption of the motor for motor, and also collects the fluctuation detection data of the power consumption including the collected kiln elapse time for each dry distillation processing cycle in the storage device in order to create a dry distillation database. The transition of the past average power consumption calculated from the carbonization results data of at least a plurality of carbonization treatment cycles and the transition of the latest power consumption of the latest carbonization treatment cycle that has been created. , Or the transition of the latest average power consumption calculated from each carbonization performance data of several carbonization treatment cycles immediately before the latest, respectively, is displayed on the screen, The transition of these past average power consumptions and the transition of the latest power consumption or the transition of the latest average power consumption are compared and analyzed, and the abnormality of the wall surface of the carbonization chamber is analyzed by the difference between the two power consumptions. Since the judgment was made, it is possible to quickly and easily confirm the occurrence of abnormalities such as roughening of the surface of the refractory wall of the carbonization chamber, carbon adhesion, etc. due to the carbonization treatment of the charged raw material coal that is repeatedly executed in the carbonization chamber. Based on the above, it is possible to take appropriate measures, and there is an excellent feature that the carbonization function of the carbonization chamber can always be maintained in a good state.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram schematically showing an outline of a coke oven facility to which an embodiment of the present invention is applied, as viewed from the side.

FIG. 2 is a block diagram generally showing an outline of a method for determining abnormality in a wall surface of a coke oven carbonization chamber to which an embodiment of the present invention is applied.

FIG. 3 is a block diagram showing a flow from collection to analysis of respective carbonization performance data in the method for determining abnormality of the wall surface of the coke oven carbonization chamber.

[Explanation of symbols]

 10 Coke Oven 11 Carbonization chamber (kiln) 11a One kiln end of the carbonization chamber 11b The other kiln end of the carbonization chamber 12 Charging vehicle 13 Extruder 13a Ram driving motor 13b Extrusion ram 14 Guide wheel 15 Fire extinguisher 21 Coke kiln removal Power consumption measurement 22 Power consumption collection 23 First personal computer 24 Second personal computer A Data collection system B Data analysis system C Data transfer / integration system

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tetsuo Yamazaki 1-1 Kurosaki Shiroishi, Hachimannishi-ku, Kitakyushu, Fukuoka Prefecture Mitsubishi Chemical Corporation Kurosaki Plant

Claims (1)

[Claims] 1. A coking coal (kneader) of a coke oven is charged with a raw material coal having a required composition by brand, and the raw material coal is charged by carbonization to obtain a coke cake. For extruding (kneading), fluctuation of kiln resistance applied to the extruding ram when operating the extruding ram of the extruder from one kiln end side of the carbonization chamber to the other kiln end side. Is a method of determining an abnormality of the wall surface of the carbonization chamber, wherein each carbonization cycle of the raw coal in the carbonization chamber,
Variation detection data collection that detects and collects fluctuations in the kiln discharge resistance as the transition of the power consumption of the ram drive motor over the entire kiln discharge time from the start of the kiln discharge of the coke cake by the extrusion ram to the end of the kiln discharge And the fluctuation detection data of the power consumption for each dry distillation treatment cycle collected in the process and the fluctuation detection data collection process, these are sequentially accumulated in a storage device together with the respective kiln elapsed times, and the kiln discharge is performed. A process of creating a dry distillation performance database that creates a dry distillation performance database based on fluctuation detection data of power consumption including elapsed time, and a history calculated from each dry distillation performance data of at least a plurality of dry distillation treatment cycles obtained in the dry distillation performance database creation process. Transition of average power consumption, transition of latest power consumption of latest dry distillation treatment cycle, or number immediately before latest Including the process of displaying the dry distillation performance data for displaying on the screen of the display device each of the transitions of the latest average power consumption calculated from the dry distillation performance data of the dry distillation treatment cycle over the time period, which is displayed on the screen of the display device. The transition of the average power consumption and the transition of the latest power consumption or the transition of the latest average power consumption are compared and analyzed, and it is possible to determine the abnormality of the carbonization chamber wall surface by the difference between these two power consumptions. Characteristic method of judging abnormality of coke oven carbonization chamber wall surface.