JPH01178590A - Detection of carbon adherent to coke oven wall - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Field of Application This invention relates to a method for accurately measuring the amount and position of carbon adhering to the carbonization chamber of a coke oven in order to remove it at an appropriate time. be.

[Prior art and its problems] Conventionally, the amount of carbon deposited in the carbonization chamber was visually observed by an extruder operator or a dedicated observer when the furnace was taken out, and the amount of carbon deposited in the carbonization chamber was determined based on experience based on the color or brightness of the inner wall. The amount and location of adhesion was determined.

However, the width of the furnace wall with a furnace length of approximately 17m is approximately 0.5! Since the extruder will be observed from the side end,
It is difficult to observe anything in the foreground, and the accuracy is not necessarily satisfactory. Furthermore, due to individual differences among observers, there is a risk that the timing of carbon removal may be incorrect; if it is too early, the work will be wasted, and if it is too late, problems will occur when removing the carbon from the kiln due to the growth of adhering carhorn.

The present invention has been made in view of the above circumstances, and provides a coke oven that appropriately determines the amount and position of carbon attached to the oven wall of the carbonization chamber and prevents mistakes in the timing of carbon removal. This paper attempts to provide a method for measuring wall carbon.

[Means and effects for solving the problem] The method for measuring carbon on the wall of a coke oven according to the present invention is to collect coke dry distilled from a carbonization chamber using an extruder equipped with radiant temperature detectors at the upper and lower parts of the ram head. When unloading from the kiln, the radiation temperature detector detects the upper part of the inner wall of the carbonization chamber,
It is characterized by measuring the temperature distribution in the lower part and determining the amount and position of carbon deposited on the carbonization chamber based on the difference between the two temperature distributions.

Carbon adheres only to the upper part where the upper surface of the raw coal charged in the furnace touches the furnace wall, and hardly adheres to the lower part of the furnace wall. Furthermore, since there is almost no temperature difference between the upper and lower parts of the furnace after leaving the kiln, it is thought that the difference in the outputs of the radiant temperature detectors provided at the upper and lower parts is due to the difference in the emissivity of the furnace walls. By determining the relationship between this difference in emissivity and the thickness of deposited carbon in advance as a calibration curve, it is possible to know the desired amount and position of deposited carbon.

[Examples] Examples of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a coke oven extruder used in the method of the present invention. Reference numeral 20 denotes a carbonization chamber where the dry distillation process has been completed, and an extruder 1 is installed in front of the carbonization chamber when taking the product out of the kiln. The extruder 1 is provided with a ram head 2, an extrusion beam 3 for driving the extrusion beam, and a support base 4 that supports the beam, is fixed to the floor 6 of the coal loading car, and has a support roller 5 on the head. It is being Also, extruder 1
is equipped with a radiant temperature measuring device 21 that measures the radiant temperature inside the furnace, which includes a first detector 11 and a second detector 12 that respectively detect the radiant temperature at the upper and lower parts of the furnace wall. , a cable 14 that sends the signal from the detector to the signal processing device 13, and a water-cooled cable pipe 15 that protects the signal from the high temperature atmosphere in the furnace. It has a device, a calculator, and a display.

The operation of the extruder 1 configured as above will be explained. The coal loading car is moved in front of the carbonization chamber 20 where the dry distillation process has been completed, the door of the carbonization chamber is removed, and the ram head of the extruder is pushed into the pile from the front of the carbonization chamber. At this time, the coke in the coke chamber is pushed out to the opposite side, but the detectors 11 and 12 enter the coke chamber together with the ram head and detect radiation on the wall surface while scanning in the furnace length direction. This signal is sent through a cable 14 protected by a water-cooled cable conduit 15 to a signal processing device. Here, the two first . The difference in the outputs of the second detectors 11 and 12 is calculated over the entire length of the carbonization chamber in the longitudinal direction, and the relationship between the difference in outputs and the thickness of the 1-inch carbon, determined from previously accumulated data, is calculated. Using the calibration curve shown, the distribution of deposited carbon in the carbonization chamber is determined along with its thickness, and this is displayed on the display. This makes it possible to determine the appropriate timing for removing the adhered carbon.

FIG. 2 shows an example of outputs obtained from the first and second detectors. The vertical axis is the temperature whose emissivity is calibrated to the furnace wall brick, and the horizontal axis is the distance measured from the coke exit side of the coking chamber. The reason why the temperature is higher on the exit side is because the width of the coking chamber is wider in the extrusion direction so that the coke can be pushed out smoothly, so the temperature of the furnace wall is raised accordingly. is the temperature difference between the top and bottom. Since the emissivity of the attached carbon is higher than that of the furnace wall brick, the indicated value is higher even at the same temperature. As mentioned above, the output from this detector can be input to a signal processing device to determine the state of carbon adhesion.

[Effects of the Invention] According to this invention, the radiant temperature at the top and bottom of the carbonization chamber is measured in the longitudinal direction, and adhering carbon is detected from the difference, so the amount and position of carbon adhering to the furnace wall can be accurately determined. It is possible to make a good judgment and avoid making mistakes in the timing of carbon removal.

[Brief explanation of the drawing]

FIG. 1 is a side view of an extruder used in the method of the present invention, and FIG. 2 is a graph showing the distribution of furnace wall temperature. DESCRIPTION OF SYMBOLS 1... Extruder, 2... Ram head, 3... Extrusion beam, 4... Support stand, 5... Support roller,
6... Floor, 11. 12... Detector, 13... Signal processing device, 14... Cable, 15... Water cooling cable pipe, 21... Radiation temperature measuring device.

Claims (1)

[Claims] When dry distilled coke is taken out of the kiln from the carbonization chamber by an extruder equipped with radiant temperature detectors at the top and bottom of the ram head, the radiant temperature detectors detect the temperature distribution at the top and bottom of the inner wall of the carbonization chamber. A method for measuring carbon on the wall of a coke oven, characterized in that the amount and position of carbon adhering to a coking chamber are measured based on the difference in temperature distribution between the two.