JPS6225974B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a furnace temperature measuring device for a coke oven having a large number of carbonization chambers.

Generally, a coke oven is formed of a furnace group in which independent carbonization chambers and combustion chambers are arranged alternately.

On the other hand, the carbonization time from when the coal is charged into the carbonization chamber until it is fired is influenced by external conditions such as the moisture content and particle size of the charged coal, but most of it is influenced by the temperature of the combustion chamber. It is determined accordingly. Therefore, temperature measurement in the combustion chamber is one of the important requirements for controlling coke manufacturing conditions.

Conventionally, combustion chamber temperatures have been measured manually using optical pyrometers, and have to be measured over a relatively short period of time. Moreover, this temperature measurement method required a considerable amount of time even for an experienced person to measure one location, making it difficult to measure all combustion chambers in a short period of time, and there were drawbacks such as large human errors. .

In addition, temperature measurement methods that do not use an optical pyrometer include a method of measuring by installing a thermocouple in the upper space of the combustion chamber, or a method of measuring the temperature by installing a thermocouple in the upper space of the combustion chamber, or a method of measuring the temperature by installing a thermocouple inside the refractory on the top of the partition wall between adjacent combustion chambers or on the top of the hairpin. There is a method of measuring by installing a thermocouple. However, with the former method, the measured value pulsates due to various complex heat transfer mechanisms, as well as disturbances in the draft and gas flow velocity, making it difficult to grasp the value as a representative value of the furnace temperature. There is. In addition, the latter method measures the temperature inside the refractory, so it has the disadvantage that the measured value lags behind the temperature change inside the combustion chamber. This is not a satisfactory method of measurement.

The object of the present invention is to eliminate the above-mentioned drawbacks of the conventional devices, and to detect the light from the bottom of the combustion chamber through the opening of the Furyu nozzle. Using a thermometer that uses heat radiation such as a two-color thermometer, three-color thermometer, radiation thermometer, or infrared thermometer, measure the furnace temperature continuously in a short period of time while the measuring vehicle is running over the furnace. An object of the present invention is to provide a coke oven furnace temperature measuring device.

Furthermore, the direct object of the present invention is to enable continuous operation of opening the lid of the Furyu nozzle, measuring the temperature inside the combustion chamber, and closing the lid after measurement while driving the measurement vehicle to each location to be measured. An object of the present invention is to provide a furnace temperature measuring device for a coke oven.

The details of the furnace temperature measuring device of the present invention will be explained below. Regarding furnace temperature measurement in a coke oven, there are generally two methods: measuring the temperature of each combustion chamber along the direction of the furnace bed, and measuring the temperature in the direction of the length of the furnace.

First, measurement of temperature in the direction of the furnace will be explained.
In a coke oven, generally, half of the burners in the combustion chamber that are connected in the longitudinal direction of the combustion chamber burn, and after a predetermined period of time, the other half starts burning and the combustion chamber that was burning until then stops. Combustion is performed by alternating these steps. Furthermore, if the lid of the Furyu nozzle is opened during combustion, the temperature of the flame inside the combustion chamber will be measured, making it impossible to measure the desired bottom brick surface temperature. Further, the temperature of the combustion chamber is low at the extruder side, increases with a certain temperature gradient toward the exit side from the kiln, and becomes the highest at the exit side from the kiln. The average temperature of the combustion chamber is at the center in the furnace length direction. Therefore, measuring the indoor temperature from the Furyu nozzle closest to the center on the side where combustion is stopped will not be affected by the combustion in the room, and will also measure the average temperature of the combustion chamber. desirable for this reason. Therefore, even if combustion has stopped, it is best to measure the row of Furyu nozzles closest to the center that are lined up in the direction of the furnace.

There are typically two types of structures for coke oven heating flame channels. One of them is a structural style typified by an Otto furnace. For example, in Fig. 1, the odd-numbered combustion chambers 1, 3, . . . are extruded. Machine side 1a, 3a,...
... burns first, and the even-numbered combustion chambers 2, 4, ...
The combustion takes place on the exit side 2b, 4b, . . . after a certain period of time (for example, 20 minutes), and the combustion is stopped on the opposite side, that is, on the odd numbered side, the exit side from the kiln and on the even numbered side, the extruder side burns. In other words, if we consider only the two rows of Furyu nozzles closest to the center of the combustion chamber out of the halves divided from the center of each combustion chamber, the burning part will be in a staggered shape as shown by the broken line A or B in Figure 1. become. For this reason, if you want to continuously measure the temperature of each combustion chamber in the direction of the furnace using a thermometer installed on a measuring car, in the part where combustion has stopped, follow the broken line A or B in Figure 1. It needs to run. However, it is practically difficult to open and close the lid and perform measurements without stopping the measurement vehicle while the vehicle is running in this manner.

In the case of an Otto furnace, in the case of an oven, the lids are opened every other nozzle on the dashed line C or D in Fig. 1, and the lids are opened → temperature measurement → lids are closed in the direction of the oven furnace, and the combustion chamber reaches the endmost combustion chamber, where it is further combusted. When the location is switched, measurements are taken on every other remaining Furyu nozzle in the opposite direction.
That is, in FIG. 1, measurements are taken on the odd-numbered combustion chambers starting from the combustion chamber 1 along the broken line C, and when the other end is reached, the measurement is made on the even-numbered combustion chambers by moving in the opposite direction. For this reason, in the above example, the lids of even-numbered combustion chambers are prevented from being opened on the outward journey, and the lids of odd-numbered combustion chambers are prevented from being opened on the return journey.

Next, in the structural style typified by the Karl Steel furnace, the same side of each combustion chamber (for example, the extruder side 1a, 2a, ...) is first burned, and after a predetermined period of time (for example, 20 minutes), the opposite side ( The method in which the kiln exit side) is used for combustion, and combustion is performed alternately at regular intervals. Therefore, in the case of this type of furnace, it is sufficient to sequentially open the lids, measure, and close the lids of all the Furyu nozzles in the same direction on the side where combustion is stopped.

As mentioned above, measurements in the furnace group direction vary depending on the type of furnace, and in the case of an automatic furnace, measurements must be made every other time. In the present invention, measurements can be made in any of the above cases as described in the following embodiments.

FIGS. 2 and 3 are a front view and a plan view of a measuring wheel used in the furnace temperature measuring device of the present invention. In these figures, reference numeral 11 denotes a measuring car that runs along a rail laid on the furnace bed, 12 a monochromatic car installed extending in a direction perpendicular to the direction of movement of the measuring car 11;
A thermometer such as a two-color or three-color thermometer, a radiation thermometer, an infrared thermometer, etc. is supported by a support arm 13 at a position where the measuring vehicle passes over the Furyu nozzle to be measured when it is running. Therefore, when the lid of the Furyu nozzle is opened, the furnace temperature is measured by detecting light from the bottom of the furnace. Reference numerals 14 and 14' designate lid opening/closing members, which are plate-shaped as shown in FIG. 4, and are supported horizontally by support plates 15 and 15'. 1
Reference numerals 6 and 16' denote lid closing members, which are supported by support plates 17 and 17' as shown in FIG. 5, and can be rotated only in the directions indicated by arrows in FIG. 2, respectively.

FIGS. 6 and 7 are views showing the lid of the Furyu nozzle used in the present invention, with FIG. 6 being a plan view and FIG. 7 being a side view. In these figures, 20 is a cylindrical opening of the Friyu nozzle, 21 is a lid, 22 is a bearing part with one end fixed to the side surface of the cylindrical opening 20 of the Friyu nozzle and holds the shaft 23, and 24 is a lid fixed to the shaft 23. An opening/closing plate, 25 is an arm fixed to one end of the shaft 23, and 26 is an arm 2 fixed to one end of the shaft 27.
It is mounted so as to be rotatable about the shaft 27 by a lever connected to the shaft 27. Further, the arm 25 and the shaft 27 are fixed or rotatable. 28 is a stopper provided on the arm 25.

As shown in FIG. 8, the lever 26 of the above-mentioned lid structure is partially composed of a straight portion 26a and a curved portion 26b. Therefore lever 2
6 from the direction of arrow G, the lever 26
tries to rotate around the shaft 27, but the linear portion 26a hits the stopper 28 and pushes it further, so the lever 26 and the arm 25 rotate together with the shaft 23. As the shaft 23 rotates, the lid opening/closing plate 24, which is fixed to the shaft 23, rotates around the shaft 23 to open the lid 21. On the other hand, when the lever 26 is pushed in the direction of arrow H, only the lever 26 rotates around the shaft 27.

In the present invention, in the case of an Otto furnace, the lids having the structure described above are installed in alternating directions as shown in Figure 9, and in the case of a Karl Steel furnace, they are installed in the same direction as shown in Figure 10. As shown in Fig. 9 or 10, the measuring car that has already been installed moves along the rails laid on the furnace bed, and sequentially opens the lid of only the designated Furyu nozzle → measures → closes the lid. Go repeatedly.

The temperature measurement of the combustion chamber by the furnace temperature measuring device of the present invention will be explained below.

First, we will discuss the case of measuring in the direction of the furnace furnace in an Otto furnace. Now, in Fig. 1, the extruder side 2 of the even-numbered combustion chambers 2, 4, ... among the combustion chambers.
a, 4a, . . . are burning, while the odd-numbered combustion chambers 1, 3, .
Suppose that it is burning. In that case, for example, if measurement is performed on the extruder side, odd-numbered 1a, 3a,
...has stopped burning and can be measured. In this case, if the measuring wheel is run from the direction of the combustion chamber 1 as shown in FIG. 9, the measuring wheel will first reach the fuel nozzle of the combustion chamber 1. Here, since this Friyu nozzle is provided with a lid as shown in FIG. 9, the lid opening/closing member 14 provided on the measuring wheel comes into contact with the lever 26 of the lid. In this case, since the lid opening/closing member 14 pushes the lever 26 in the direction of arrow G in FIG. 8, the lid is opened as already explained. As the measurement car continues to travel, the thermometer 12 passes over the Furyu nozzle with its lid open, and the temperature at the bottom of the furnace is measured. Subsequently, the lid opening/closing member 14' passes the position of the lever 26, but since the lid is already open, there is no change. Further, since the lid closing member 16' comes into contact with the opened lid, the lid is pushed to close the lid. As the measuring wheel further advances, it reaches the friyu nozzle of the combustion chamber 2, and the lid opening/closing member 14 comes into contact with the lever. However, since the even-numbered combustion chambers are provided with lids in the opposite direction to the odd-numbered combustion chambers, the lever must be pushed in the direction of arrow H in FIG. Therefore, only the lever 26 rotates and the lid is not opened. Similarly, the lid opening/closing member 14' also passes through. In this way, the measuring wheel passes over the combustion chamber 2 without opening the lid and therefore without measuring the temperature. For the odd-numbered combustion chambers where combustion has stopped, the lid is opened, the temperature is measured, and the lid is closed, while for the even-numbered combustion chambers where combustion is in progress, the gas simply passes through. .

In this way, travel in the direction of the furnace group is completed, and temperature measurements of all combustion chambers where combustion has stopped are completed. After that, if the measurement car is run in the opposite direction when the combustion location is switched, the operation of opening the lid → measuring temperature → closing the lid will be performed for the even-numbered combustion chamber where combustion has stopped, and the Regarding the odd-numbered combustion chambers, the lids are not opened, closed, or measured at all, and they are simply passed through. In this way, when the measuring wheel returns to the starting position, temperature measurements for all combustion chambers are completed.

Next, the case of a Karl Steel furnace will be explained. In the case of this type of furnace, a lid is attached to the flue nozzle used for measurement as shown in FIG. In other words, the lids are attached to each combustion chamber in the same direction. Then, when the combustion on the side with the lid that can be opened and closed by the measuring wheel according to the present invention is stopped, the measuring wheel may be moved in the direction in which the lid can be opened and closed. For example, in the case of FIG. 10, when the combustion on the extruder side is stopped, the temperature in all combustion chambers can be measured by running it from the combustion chamber 1 side in another direction toward the furnace. Therefore, there is no reciprocating measurement, and after the measurement is completed, the measurement wheel can be returned to the starting position before the start of the next measurement.

In addition to measuring the combustion chamber temperature, the lid may be opened to observe or clean the interior of the chamber. If the measuring wheel runs while the lid is left open, the lid closing member 16 may come into contact with the open lid. In particular, the lid 2 opened as shown in FIG.
If the lid closing member 16 pushes the lid in a direction that opens the lid further than the lid 1, it may cause a malfunction. However, in the device of the present invention, as shown in FIG. 5, the lid closing member 16 can be rotated in the opposite direction to the direction in which the lid is closed, so that the device can run without any trouble. If the measuring car runs further, the lid opening/closing member 1
4 pushes the lever 26 to close it, which closes the lid that you forgot to close, and prevents temperature measurement from this Friyu nozzle. There is also no possibility that the upper lid closing member 16' will hit the lid.

Although the above explanation has been made regarding measurements in the furnace group direction, it can also be applied to measurements in the furnace length direction. For measurements in the furnace length direction, the lid should be installed in a direction rotated 90 degrees. Then, in exactly the same manner as described above, the probe is moved in the length direction of the furnace along the combustion chamber to be measured, and measurements are performed on the portion where combustion has stopped. After the combustion location is subsequently switched, the remaining half of the measurements may be performed. The time for these measurements can be automatically controlled using a timer or the like.

Measuring the length of the furnace does not make sense if only a specific row or combustion chamber is measured, but many, or even all, combustion chambers in the furnace complex must be measured. For this purpose, the measurement vehicle needs to be able to move not only in the direction of the furnace length, but also in the direction of the furnace group. The combustion chamber to be measured may be determined by moving in the direction of the furnace group, and then the measurement may be performed by moving in the direction of the furnace length. To do this, a first rail is laid in the direction of the furnace at both ends of the extruder side and the outlet side of the kiln, a trolley running on these rails is placed respectively, and a second rail is laid between the two trucks in the direction of the furnace length. A measuring vehicle may be provided so that the measuring vehicle can run on this second rail. That is, by moving both carts toward the furnace along the first rail, the measurement car is moved along the second rail toward the furnace and is positioned in the combustion chamber to be measured. Measurements can be taken by driving a measuring vehicle over the area.

As explained above, according to the furnace temperature measuring device of the present invention, since the measuring car runs independently of the charging car, temperature measurement can be performed at the time when it is necessary. Moreover, since the lid is opened/closed and the measurement is performed while the measurement vehicle is running without stopping during the measurement, it is possible to continuously measure each fuel. Furthermore, it has the advantage that continuous measurements can be made in any type of furnace and any type of combustion.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the arrangement of the Furyu nozzle on the coke oven, Fig. 2 is a side view of the measuring wheel used in the device of the present invention, Fig. 3 is a plan view of the measuring car, and Fig. 4 is a perspective view of the lid opening/closing member. 5 is a perspective view of the lid closing member, FIG. 6 is a plan view of the lid provided on the Furyu nozzle, FIG. 7 is a side view of the lid, FIG. 8 is a diagram showing the lid opening/closing operation, and FIG. The figure shows how the lid is installed in an Otto furnace, FIG. 10 shows how the lid is installed in a Karl Steel furnace, and FIG. 11 is a diagram when the measuring car runs on an already open lid. 1, 2, 3... Combustion chamber, 11... Measuring car, 12
... Thermometer, 14, 14' ... Lid opening/closing member, 1
6, 16'... Lid closing member, 20... Friyu nozzle opening, 21... Lid, 25... Arm, 26
...Lever, 28...Stopper.

Claims (1)

[Scope of Claims] 1. A measuring car that runs to pass through each frieux nozzle to be measured on the furnace of a coke oven in order to measure the furnace temperature through the frieux nozzle, and a heat radiation installed on the measuring car is used. In an apparatus comprising a thermometer and a lid opening/closing member, the lid opening/closing member opens and closes a lid of a Furyu nozzle and the temperature in the combustion chamber is sequentially measured through the opening of the Furyu nozzle using the thermometer, wherein the lid has a lever for opening the lid. A coke oven oven temperature measuring device, wherein a lid opening/closing member provided on the measuring wheel pushes the lever to open the lid only when the measuring wheel runs in a specific direction determined for each of the Furyu nozzles. 2. The furnace temperature of the coke oven according to claim 1, wherein the lid is opened when the lever is pushed in a specific direction by the lid opening/closing member, and only the lever rotates when the lever is pushed in the opposite direction. measuring device.