JPH06145666A - Method for detecting carbon thickness sticking to coal charging port of coke oven - Google Patents

Abstract

PURPOSE:To accurately detect the subject sticking carbon thickness from a measured value of an angle of a measuring rod by rotating the measuring rod composed of a double pipe having a protrusion at the tip thereof with one end of a charging port as a fulcrum, bringing the tip into contact with the stocking carbon part and measuring the angle thereof. CONSTITUTION:The thickness of carbon 11 sticking to a coal charging port 12 of a coke oven is measured. In the process, a thickness measuring device, equipped with a measuring rod 1 composed of a double pipe having a protrusion 10 at the tip and cooled by circulating cooling water from a cooling water tank 6 through the interior with a pump 7, is horizontally installed on the oven by operating a level regulator 4 with a level 3. The measuring rod 1 is then rotated with one end of the charging port 12 as a fulcrum to bring the tip of the protrusion 10 into contact with the sticking carbon 11. The contact is confirmed by lighting of an electric bulb 9 using an electric circuit formed from the sticking carbon 11, the measuring rod 1, a cell or a battery 8 and the electric bulb 9. The angle of the measuring rod 1 from the vertical line is measured with a protractor 2 and a pointer 5. The thickness of the sticking carbon 11 is calculated by the trigonometry to accurately detect the thickness of the carbon sticking to the coal charging port of the coke oven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the thickness of carbon adhering to a coal charging port of a coke oven.

[0002]

2. Description of the Related Art In a chamber furnace type coke oven, crushed coal is charged into a carbonization chamber from a charging vehicle. Both sides of the carbonization chamber are combustion chambers, and the heat generated by gas combustion is transferred inside the wall and enters the carbonization chamber. The heat causes the coal to be carbonized to form coke.

In this case, carbon generated by carbonization of coal adheres to the inner wall and grows in the coke oven. This adhered carbon grows in the kiln, the charging port, etc., and causes troubles such as coke extrusion and blocking of the charging port.

To solve this problem, in a carbonization chamber, Japanese Patent Laid-Open No. 58-58
As described in Japanese Patent Application Laid-Open No. 210910, the adhering condition of carbon is grasped by the increase of the extruding current of the extruding device, and is used as an index for determining whether or not to remove carbon. There is also a method of measuring the distance by using a light source to measure the carbon deposition thickness as shown in JP-A-63-191005, but the former cannot be used without an extrusion device.
The latter is a fairly complicated device such as a light source + mirror and sliding device, and has a high temperature (about 100 ° C) like a coke oven.
There are many problems such as malfunction of equipment, thermal deformation, failure, and poor measurement accuracy under the environmental condition of 0 ° C and much tar and dust. For this reason, the above-mentioned measuring method is not applied to the detection of the thickness of carbon deposited at the inlet.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to accurately measure the carbon thickness to detect the adhesion state and the adhesion thickness, remove it, and control the carbon thickness below a certain value. This is to suppress the occurrence of carbon blockage at the charging port.

[0006]

According to the present invention, in detecting the thickness of carbon adhering to a coal charging port of a coke oven, a measuring rod consisting of a double pipe cooled and provided with a projection at its tip is provided at one end of the charging port. Is used as a fulcrum, and the tip of the measuring rod is brought into contact with the deposited carbon portion.

This method of detecting the thickness of deposited carbon will be described with reference to FIG. The thickness of the adhered carbon is measured by utilizing the fact that the adhered carbon is relatively hard and conductive, and is a rod-shaped relatively hard double tube having a protrusion 10 at the tip as a measuring instrument. First, the measurement rod 1 is partially inserted into the charging port with the protrusion 10 facing downward, and is vertically erected and positioned at an intermediate point of the measurement rod 1. Fix the points.

In the next step, the measuring rod is rotated around the fixed intermediate point and the rotation is stopped when the protrusion at the lower end of the rod comes into contact with the surface of the adhered carbon 11. In this case, the angle θ of rotation of the measuring rod 1 is calculated to calculate the thickness of deposited carbon.

A method of calculating the deposited carbon thickness will be described with reference to FIG.

Reference numeral 12 is an upper furnace wall of the charging port, 1 is a measuring rod composed of a rod-shaped double tube, and 10 is a protrusion attached to the tip of the rod.

First, the intermediate portion of the measuring rod 1 is brought into contact with the upper furnace wall 12 of the charging port to vertically fix the measuring rod 1. Next, one point of the upper furnace wall 12 of the charging port and the measuring rod 1
The measuring rod 1 is rotated around the point of contact as the fulcrum to bring the protrusion 10 at the tip of the measuring rod 1 into contact with the adhered carbon. When the rotation angle at this time is θ, the length below the fulcrum of the measuring rod 1 is A, the length B of the protrusion, and the horizontal distance C between the upper end of the charging port and the lower end of the charging port opposite to this point. The attached carbon thickness t is C- (Asi
It can be calculated by nθ + Bcosθ).

Further, in this case, as shown in FIG. 2, using the attached carbon 11 on the upper part of the charging port and the measuring rod 1, the attached carbon 11 → copper wire 13 → battery 8 → copper wire 13 → light bulb 9 → measurement rod 1 → Protrusion 10 → If an electric circuit of attached carbon 11 is made, a current flows when the protrusion 10 at the lower end of the measuring rod 1 comes into contact with the surface of the attached carbon whose thickness is to be measured. It is possible to measure the deposited carbon thickness with accuracy.

As described above, according to the present invention, the rotation angle θ is measured by using the measuring rod 1, and the thickness of the deposited carbon is calculated. Therefore, the measuring method is simple and the rotation angle can be easily and accurately measured. The thickness of the adhered carbon can be kept below a certain level by determining the amount of adhered carbon to be removed by this measurement value and removing the adhered carbon by air blowing combustion.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 2 shows a measuring rod 1 to which the present invention is applied.
The fulcrum of is set on the edge of the upper furnace wall 12 of the charging port, and the thickness of the deposited carbon is measured.

In the figure, a measuring rod 1 provided with a projection at its tip is provided with a pump 7 for cooling water from a cooling water tank 6 in a double pipe.
Circulate to cool. Next, in order to install the apparatus horizontally on the furnace, the leveler 3 is viewed and the apparatus is horizontally adjusted by the level adjuster 4. Measuring rod 1 with a protrusion on the tip after horizontal adjustment
Is rotated to bring the tip of the protrusion into contact with the attached carbon. In this case, in order to catch the contact more accurately,
Measuring rod 1 with attached carbon 11 and projection 10 at the tip
The contact is confirmed by lighting the light bulb 9 using the illustrated electric circuit made up of the battery 8 and the light bulb 9. After checking, measure rod 1
The angle from the vertical line is measured by the protractor 2 and the pointer 5, and the thickness of the deposited carbon is calculated by trigonometry.

The reason for cooling the measuring rod is that the inside of the charging port is usually close to 1000 ° C., so that the double tube is deformed by heat. In order to prevent this, it is necessary to flow water into the rod-shaped double pipe and keep the temperature of the double pipe at 100 ° C. or lower.

Here, the measuring rod is a double pipe as one method of cooling, and may be a single pipe or a multiple pipe if it can be cooled. The measuring rod may be a curved pipe instead of a straight pipe. Further, the cooling medium is not limited to water as the circulating substance as long as the measuring rod 1 having the projection 10 at the tip does not deform, and may be a liquid or gas other than water.

Next, a bolt is used as the horizontal adjuster 4, but the bolt is not limited to the bolt as long as the vertical fine movement can be adjusted. Further, although the protractor is used to obtain the angle of the measuring rod 1, the protractor is not limited to the protractor as long as the angle of the measuring rod can be obtained.

The protrusions 10 at the tip of the measuring rod deal with irregularities on the surface of the carbon adhering to the charging port. If there is convex carbon adhering to the upper part of the charging port, the thickness of the carbon adhering to the lower part of the convex shape will be described. Can not be measured without the protrusion 10 at the tip of the measuring rod because the rod hits the convexly attached carbon. Therefore, the length of the protrusion 10 of the measuring rod 1 should be longer than the thickness of the convex portion of the convex attached carbon, and this thickness was measured by various carbons attached to the inlet, and the maximum was 70 mm. It was found that the length should be 70 mm or more.

FIG. 3 shows a comparison between the case where a protrusion is provided at the tip of the measuring rod 1 and the case where no protrusion is provided. In the case of the protrusion 10 provided at the tip of the measuring rod 1 (a), it is possible to measure even the concave portion of the surface of the adhered carbon, whereas in the case of no protrusion (b), It can be seen that it is impossible to measure in the portion where the surface state of the adhered carbon is concave.

Next, Table 1 shows the effects of the present invention.

[0022]

[Table 1]

[0023]

As described above, the carbon thickness can be measured extremely easily by using the deposited carbon thickness detecting device of the present invention. In addition, since the device structure is simple, it is easy to manufacture, and because the device is free from damage, deterioration, and wear due to thermal deformation, and the measurement accuracy is excellent, the thickness of the deposited carbon can be kept constant, It is an extremely excellent method for detecting the thickness of deposited carbon, which can avoid operating troubles due to increase.

[Brief description of drawings]

FIG. 1 is a diagram showing a measurement principle of the present invention.

FIG. 2 is a schematic view of an embodiment of the measuring method of the present invention.

FIG. 3 is a diagram showing a comparison of measurements according to the measurement method of the present invention with and without protrusions, where (a) is a case with protrusions and (b) is a case without protrusions.

[Explanation of symbols] 1 ... Measuring rod 2 ... Protractor 3 ... Level 4 ... Level adjuster 5 ... Pointer 6 ... Water tank 7 ... Pump 8 ... Battery 9 ... Light bulb 10 ... Protrusion 11 ... Adhesive carbon 12 ... Furnace wall 13 ... Copper wire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Shimakawa 1-1, Toibata-cho, Tobata-ku, Kitakyushu Nippon Steel Yawata Works Co., Ltd.

Claims (1)

[Claims] 1. When measuring the thickness of carbon deposited on a coal charging port of a coke oven, a measuring rod consisting of a double pipe that is cooled and has a protrusion on its tip is rotated about one end of the charging port as a fulcrum, and the measurement is performed. A method for detecting the thickness of carbon adhering to a coal charging port of a coke oven, characterized in that the thickness of adhering carbon is detected from the angle of the measuring rod obtained by bringing the tip of the rod into contact with the carbon adhering portion.