KR20120075284A - Coke core temperature measuring apparatus of coke oven and method of the same - Google Patents

Abstract

PURPOSE: A method for measuring carbonizing temperature of a cokes oven is provided to measure the dry distillation temperature of coals by consecutively measuring the temperature at an intermediate height of coal seams charged in a carbonizing chamber and to control the dry distillation conditions or estimate the dry distillation states. CONSTITUTION: A method for measuring carbonizing temperature of a cokes oven comprises a lead, a guide pipe, a height adjusting part, and a temperature sensor. The lead is installed in a charging port of a carbonizing chamber in a cokes oven. The guide pipe is inserted to an intermediate height of coal seams charged through a charging port. The height adjusting unit can adjust to the insertion depth of the guide pipe. The temperature sensor is inserted in the guide pipe to measure the temperature of the intermediate height of the coal seams.

Description

Coke oven temperature measuring device and its method {COKE CORE TEMPERATURE MEASURING APPARATUS OF COKE OVEN AND METHOD OF THE SAME}

The present invention relates to a coal oven temperature measuring apparatus and method of the coke oven to measure the coal temperature during the drying of coal in the coke oven to predict the drying process.

In general, a coke oven manufactures coke by distilling coal from a raw material supplied in a state such as a coal, using blast furnace gas as a main fuel.

Coke oven is a facility to dry the coke used as fuel and reducing agent in the steel mill to produce cokes (coal) by charging the coal charged from the charging car at a high temperature in the carbonization chamber.

Coal charged in the carbonization chamber is supplied in a solid state, softened / melted to an elevated temperature, changed to a liquid state, and then undergoes a process in which volatiles are vaporized and solidified. This phase change is closely related to the coal temperature.

Softening / melting of coal in dry distillation occurs between 300 ° and 400 ° and between 500 ° and 600 °, in which most volatiles vaporize and coal expands in volume, causing wall pressure.

On the other hand, the coal charged in the carbonization chamber is carbonized from the outside close to the combustion chamber and is burned later toward the center, and thus the temperature distribution is lowered toward the center. And, by measuring the temperature distribution of the coal, it is possible to know the current phase change state of the coal, it is possible to predict when the dry distillation is completed.

However, in the related art, it is difficult to measure the temperature of the coal charged into the carbonization chamber of the coke oven, and furthermore, the situation is not measured. Conventionally, the temperature sensor is installed inside the riser to measure the carbonization chamber temperature of the coke oven, and thus, it is not possible to accurately measure the carbonization temperature, and accordingly the temperature gradient according to the position of the coal charged in the carbonization chamber. It is difficult to predict the degree of dryness due to the unpredictability.

One embodiment of the present invention is to provide a temperature measuring apparatus and method of the coke oven in which the temperature sensor is located in the center of the coal charged in the carbonization chamber to measure the temperature change generated during the carbonization process of coal For the purpose of

Apparatus for measuring the bombardment temperature of the coke oven according to an aspect of the present invention is a lead installed in the carbonization chamber charging of the coke oven; A guide pipe inserted through the charging hole to a middle height of the charged coal seam; A height adjuster provided to adjust the insertion depth of the guide pipe; And a temperature sensor installed inside the guide pipe to measure the temperature of the middle height of the coal seam.

The guide pipe may include a wedge installed at an end inserted into the coal seam and having a sharp end.

The height adjusting part may include a plurality of connecting members installed in the guide pipe and continuously supplied and connected through the lead.

The outer side of the connecting member is formed with a spiral gear portion, the height adjustment portion may further include a motor having a gear meshed with the spiral gear portion.

The connection member may be provided with an internal circuit electrically connected to the temperature sensor.

According to another aspect of the present invention, a method for measuring a coal temperature of a coke oven includes: charging coal through a plurality of charging holes formed in a carbonization chamber; Installing each of the above-mentioned coke oven temperature measuring apparatuses of the coke oven, and pressing and inserting the end portions of the respective guide pipes so as to be positioned at the intermediate height of the coal bed; Continuously measuring a temperature distribution from the initial dry distillation of the coal bed to the completion of dry distillation from a temperature sensor installed in the guide pipe; And determining the degree of dryness of the coal seam using the measured temperature distribution of the coal seam to adjust the dry condition of the carbonization chamber.

In the step of determining the degree of dry distillation of the coal seam, if all the temperature sensors installed in each charging hole are maintained at the same temperature, it may be determined that dry distillation is completed.

According to one embodiment of the present invention, it is possible to continuously measure the temperature of the middle height of the coal bed charged in the carbonization chamber, and thus it is possible to measure the dry water temperature of the coal, and to control the dry distillation conditions by making data The state can be predicted. Therefore, the end time of dry distillation, etc. can be previously determined according to the dry distillation temperature of coal. In addition, coke of optimum quality may be produced by adjusting conditions such as dry temperature or time.

1 is a block diagram showing the overall configuration of a coke oven to which a damper device according to an embodiment of the present invention is applied.
Figure 2 is a conceptual diagram illustrating to explain the drying process of the coke oven according to an embodiment of the present invention.
Figure 3 is a simplified view of the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention.
Figure 4 is a temperature graph according to the installation position of the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention.
Figure 5 is a graph showing the correlation between the temperature and time of the coal temperature measured in the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention.
Figure 6 is a graph showing the temperature distribution of coal according to the lateral distance of the carbonization chamber measured by the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention.
7 is a graph showing the temperature distribution of the low moisture-containing coal according to the lateral distance of the carbonization chamber measured by the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings.

1 is a block diagram showing the overall configuration of a coke oven to which a damper device according to an embodiment of the present invention is applied, Figure 2 is a conceptual diagram showing to explain the drying process of the coke oven according to an embodiment of the present invention to be.

Referring to FIGS. 1 and 2, the coke oven 100 includes a plurality of carbonization chambers 110, and the coal charged in the carbonization chambers 110 may be supplied with external air for about 19 hours at a temperature of about 1240 ° C. or more. Blocking and distilling can produce coke free of volatiles in coal.

Looking at such a coke manufacturing process, first withdraw the carbonization chamber door 112 of the coke oven 100, and by the ram 132 of the extruder 130 to discharge the coke after dry carbonization from the carbonization chamber 110, transfer car After loading to the fire truck 150 through the coke guide of 140, it is moved to the digestion tower to digest the dried coke to produce the coke of the final product.

When the coke oven 100 burns gas in a combustion chamber and heats it, coal charged in the carbonization chamber 110 is carbonized, and coke oven gas (COG) is generated by thermal decomposition in this process. . The COG generated as described above may be sent to the Hwaseong plant through the rising pipe 200 provided in the coke oven 100 and the gas collection pipe 210 connected thereto.

In the present embodiment, an upper portion of the coke oven 100 may be provided with a charging hole 114 for charging coal.

The charging port 114 may be provided with a charging vehicle 120 that moves along the upper portion of the coke oven 100, and the carbonization chamber 110 through the charging opening 114 using the charging vehicle 120. Coal can be charged.

The charging hole 114 may be provided with a cover, and the cover is opened and the coal is charged. In the drying process of coal, the cover is closed to cover the charging hole 114.

On the other hand, the charging hole 114 may be installed in the coal temperature measuring apparatus 220 for measuring the coal temperature of the coke oven (100).

For example, four charging holes 114 of the carbonization chamber 110 may be provided as about four, and in the present embodiment, the coal temperature measuring apparatus 220 may be installed in at least one charging hole 114. It is also possible to measure the bombardment temperature of the coke oven 100 is installed in the charging hole 114.

Figure 3 is a simplified diagram of the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention.

Referring to FIG. 3, the coal temperature measuring apparatus 220 of the coke oven 100 of the present exemplary embodiment may include a lead 222 installed at the charging hole 114.

The lid 222 may be installed in the charging port 114 after the coal is charged in the state in which the lid of the charging inlet 114 is opened, and the coal is sealed after the lid is sealed in the state in which the lid 222 is inserted. Can be carbonized.

The lead 222 may be provided with a guide pipe 224 inserted into the charged coal seam.

The guide pipe 224 may adjust the depth inserted into the carbonization chamber by the height adjusting unit.

To this end, the height adjustment part may include a plurality of connecting members continuously coupled to the guide pipe 224.

The connecting member may be provided to be continuously supplied and connected through the lid 222.

The connecting member may have the same structure as that of the guide pipe 224, and preferably, a spiral gear portion may be formed on the outer side.

The height adjusting part may further include a motor having a gear meshed with the spiral gear part of the connecting member.

The motor may be connected to the control unit, and the insertion position of the guide pipe 224 may be adjusted by lowering the connection member according to the height of the preset carbonization chamber 110 and the height of the coal bed charged in the carbonization chamber 110.

In this way, one end of the guide pipe 224 of the present embodiment may be located at the intermediate height of the coal bed by the connection of the connection member.

Although the guide pipe 224 has been described as being adjustable in length by the connecting member in the present embodiment, the structure for adjusting the installation position of the guide pipe 224 is not limited and may be variously modified.

As an example, the guide pipe 224 may be provided in a length at which one end can be positioned at the middle height of the coal seam, and consists of a plurality of overlapping guide pipes, and a guide folded and folded inside the guide pipe. It is also possible to be provided with a support structure for folding or unfolding the pipeds.

In this embodiment, the wedge 226 may be installed at the end of the guide pipe 224. The wedge 226 may be formed in a shape in which the ends are pointed, and thus may be easily penetrated through the coal layer by the wedge 226 when the guide pipe 224 is inserted.

On the other hand, the guide pipe 224 may be provided with a temperature sensor 228 for measuring the temperature change of the coal seam when dry.

The temperature sensor 228 may be provided as a thermocouple. For example, a K-type thermocouple that may be used at a high temperature may be provided.

The temperature sensor 228 may be connected to a control unit (not shown), and the control unit may measure the bombardment temperature by the current difference according to the temperature measured by the thermocouple which is the temperature sensor 228.

To this end, the temperature sensor 228 may be connected to the control unit through a wire connected to the thermocouple, preferably an internal circuit connected to the temperature sensor 228 is provided inside the connection member, and through the internal circuit Can be connected.

For example, when the carbonization chamber 110 has a height of about 7.6 m, the thickness of the upper layer may be about 1.5 m. In the carbonization chamber 110, a coal layer may be charged to about 7 m.

Therefore, when the length of the lead 222 and the guide pipe 224 is 5.5 meters, the height of one end of the guide pipe 224 is located at a point of about 3.6 m, in consideration of the volume and the like volume reduced during the drying of the coal seam Guide pipe 224 may be located at the middle height of the coal seam.

On the other hand, Figure 4 is a temperature graph measured by the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention.

Referring to Figure 4, look at the coal distillation process of the carbonization chamber as follows.

Coal charged in the carbonization chamber 110 is softened / melted in a solid (coal) according to the elevated temperature is changed to a liquid state, and then undergoes a process of volatile matter is vaporized and solidified. This phase change is closely related to the coal temperature.

At this time, the softening / melting of coal occurs between 300 ° to 400 ° to 500 ° to 600 °, where most volatiles vaporize and coal expands in volume to cause wall pressure phenomenon.

On the other hand, in the present embodiment it can be seen the temperature measured by the bombardment temperature measuring device 220, looking at such a temperature graph it can be seen that the difference in the temperature gradient is large depending on the position to measure the bombardment temperature.

That is, in FIG. 4, the x-axis is a distance spaced from the wall surface of the carbonization chamber 220, and a temperature gradient may occur at a position close to the wall surface of the carbonization chamber. It can be seen.

Therefore, in order to measure the average temperature change of the coal temperature generated during the coal distillation process, the temperature sensor should be located in the middle of the coal seam.

FIG. 5 is a graph illustrating a correlation between a temperature and a time of a coal temperature measured in a coal temperature measuring apparatus of a coke oven according to an embodiment of the present invention.

Referring to Figure 5, it can be seen that the time when the temperature of the coal center reaches 400 °.

For example, when the temperature sensor 228 of the coal temperature measuring apparatus 220 has a height of about 8 m of the coal layer charged in the carbonization chamber 110 and is installed at a center point 230 mm from the wall surface of the carbonization chamber 110, the temperature is increased. When measured, it can be seen that it takes about 14 hours for the temperature of the coal center to be 400 °, and the progression distance per hour is 16.3 mm.

To summarize the time it takes for the temperature of the coal center to reach a certain temperature, it is shown in Table 1. Here, Table 1 shows the time according to the TR temperature of the carbonization chamber 110 whose length from the wall surface of the carbonization chamber 110 to the center point is 230 mm. In addition, the temperature at which the temperature sensor 228 reaches a predetermined temperature may be displayed as TR temperature. That is, the time at which the temperature sensor reaches 200 ° C. may be indicated by TR200, and the time when the temperature sensor reaches 400 ° C. may be indicated by TR400.

On the other hand, there is also a relationship with the water content in the softening layer, this relationship is shown in Table 2. In addition, increasing the heating rate increases the plasticity and swelling of coal, which can increase the strength of the micum, which means wear strength.

On the other hand, Figure 6 is a graph showing the temperature distribution of coal according to the lateral distance of the carbonization chamber measured by the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention.

When the temperature is measured while varying the lateral distance of the carbonization chamber 110 using the coal temperature measuring apparatus 220 of the coke oven 100 of the present embodiment, a temperature distribution graph as shown in FIG. 6 can be obtained.

Referring to FIG. 6, it can be seen that the temperature increase rate is slower toward the center of the carbonization chamber 110. On the other hand, the sudden temperature change in FIG. 6 may occur due to foreign matter contained in coal.

On the other hand, Figure 7 is a graph showing the temperature distribution of the low moisture-containing coal according to the transverse distance of the carbonization chamber measured by the coal temperature measuring apparatus of the coke oven according to an embodiment of the present invention. 7 is a temperature distribution during the operation at 5.5% of the target moisture of coal, it can be seen that the temperature increase rate compared to the coal with a high moisture is generally slow.

Thus, the lateral temperature distribution of a carbonization chamber can be obtained using the coaling-temperature temperature measuring apparatus 220 of the coke oven of a present Example.

For example, the speed at which the coal center temperature reaches 400 ° C. is about 16.3 mm / H, and the temperature increase rate in the softened molten layer is 2.6˜3.4 ° C./min. In addition, it can be seen that the temperature increase rate in the soft melted layer decreases due to moisture decrease.

On the other hand, in the coke oven 100 when the dry distillation is complete, the carbon temperature measuring apparatus 220 installed in each charging hole 114 of the carbonization chamber 110 may be measured at the same temperature.

As such, when the coal temperature measuring apparatus 220 of the coke oven 100 according to the present embodiment is used, it is possible to appropriately select the time point at which the coal is dried.

That is, when the temperature sensors 228 installed at each charging port 114 are all maintained at the same temperature, it is possible to determine that coking has been produced by the drying of coal is completed, thereby reducing the energy required for drying. It can be prevented, such as quality degradation due to increased cracking of coke due to overdrying.

The present invention is not limited to the above-described embodiment and the accompanying drawings, and it is possible to substitute, modify, and change various forms within the scope of the technical spirit of the present invention described in the claims. It will be self-evident to those who have knowledge.

100: coke oven 110: carbonization chamber
112: door 114: charging opening
120: charging car 130: extruder
132: ram 140: transfer car
150: fire truck 200: riser
210: gas collection pipe 220: coal temperature measuring device
222: lead 224: guide pipe
226: wedge 228: temperature sensor

Claims (7)

A lead installed in the carbonization chamber charging of the coke oven;
A guide pipe inserted into the middle height of the coal seam charged through the charging hole;
A height adjusting part provided to adjust the insertion depth of the guide pipe; And
A temperature sensor installed inside the guide pipe and measuring a temperature of a middle height of the coal bed;
Coal oven temperature measuring apparatus comprising a.
The method according to claim 1,
The guide pipe is installed at the end is inserted into the coal layer is a coal temperature measuring apparatus of the coke oven, characterized in that it comprises a wedge is formed with a sharp point.
The method according to claim 1 or 2,
The height adjustment unit is installed in the guide pipe, the coalescing temperature measuring apparatus of the coke oven, characterized in that it comprises a plurality of connecting members which are continuously supplied and connected through the lead.
The method according to claim 3,
On the outside of the connecting member is formed a spiral gear,
The height adjusting unit further comprises a motor having a gear meshed with the spiral gear portion, the coke oven temperature measuring apparatus of the coke oven.
The method according to claim 3,
The connecting member is a coal temperature measuring apparatus of the coke oven, characterized in that the internal circuit is electrically connected to the temperature sensor.
Charging coal through a plurality of charging holes formed in the carbonization chamber;
Installing a coal temperature measuring apparatus of the coke oven according to claim 1 or 2 in the plurality of charging holes, and pressing and inserting the guide pipes so that the ends of each guide pipe are positioned at the middle height of the coal bed;
Continuously measuring a temperature distribution from the initial dry distillation of the coal bed to the completion of dry distillation from a temperature sensor installed in the guide pipe; And
Adjusting the drying condition of the carbonization chamber by determining the degree of dryness of the coal bed using the measured temperature distribution of the coal bed;
Coal oven temperature measurement method of the coke oven comprising a.
In claim 6,
In the step of determining the degree of dry distillation of the coal seam, if all the temperature sensors installed in each charging hole is maintained at the same temperature, it is determined that the dry distillation is completed, characterized in that the coke oven coal-fired temperature measuring method.

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