JPH0648214B2 - Method for measuring furnace wall temperature in coking furnace carbonization chamber - Google Patents

Description

The present invention relates to a method for measuring a furnace wall temperature of a coke oven having a large number of carbonization chambers.

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

On the other hand, the dry distillation time from the charging of coal into the carbonization chamber to the firing is also affected by external conditions such as the water content and particle size of the charging coal, but for the most part it is mostly the temperature of the combustion chamber. It is decided by. Therefore, measuring the temperature of the combustion chamber is one of the important requirements for controlling the coke production conditions.

The temperature of the combustion chamber is lower on the extruder side due to the carbonization chamber and furnace width, increases with a certain temperature gradient toward the kiln discharge side, and is highest on the kiln discharge side. This temperature gradient is controlled with an appropriate temperature gradient to coke the coal charged from the extruder side of the carbonization chamber to the kiln discharge side at the same time, but tar, etc. contained in the combustion gas As a result, burner blockage occurs, which causes fluctuations in the amount of combustion gas, fluctuations in the amount of charged coal in the carbonization chamber, fluctuations in the bulk density, and other factors that cause temperature gradients to fluctuate. Since a large amount of heating gas is consumed in terms of energy, it is important in coke management to secure an appropriate temperature gradient from the extruder side to the kiln discharge side and a temperature that is absolutely necessary.

Conventionally, an optical pyrometer is used to measure the temperature of the combustion chamber artificially. Even though this temperature measurement needs to be performed in the shortest possible time, even an expert requires a considerable amount of time to measure one point, and it is not easy to measure all combustion chambers in a short time. There were drawbacks such as large artificial error.

As a temperature measurement method that does not use an optical pyrometer, a thermocouple is installed in the upper space of the combustion chamber for measurement, or inside the refractory inside the partition wall or hairpin above the adjacent combustion chambers in the combustion chamber. There is a method of installing a thermocouple for measurement. However, of these measurement methods, the former method has various complicated heat transfer mechanisms, and measurement values pulsate due to turbulence in draft and gas velocity Has a problem. In addition, the latter method has a drawback that the measured value lags the temperature change inside the combustion chamber because the temperature inside the refractory is measured, and both measurement methods accurately grasp the temperature inside the combustion chamber. It was not a satisfactory method for measuring.

The present invention has been made to eliminate the above drawbacks. The present invention will be described below.

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a side view of FIG. In these drawings, reference numeral 1 denotes an movably installed extruder, to which a ram beam 2 for extruding the baked coke is attached. 3 is a carbonization chamber, 4
Is a furnace wall of the carbonization chamber 3, 5 is a combustion chamber, 6 is a guide wheel, 7
Is a hood, 8 is a fire engine, 9 is a heat-resistant prism such as quartz glass attached to the tip 2a of the ram beam 2,
It serves as a light receiving means for receiving the radiant light from the furnace wall 4. A thermometer 10 is provided at the rear end 2b of the ram beam 2 for receiving the radiant light from the prism 9 and extracting it as an electric signal corresponding to the temperature of the furnace wall 4. As the thermometer 10, a monochromatic thermometer, a two-color thermometer, a radiation thermometer, an infrared radiation thermometer, or the like is used. Reference numeral 11 is a duct that serves as a passage for radiated light, and 12 is an air purging pipe for cleaning the light receiving surface 9a of the prism 9.

Next, the operation will be described.

The extruder 1 is stopped at the position of the carbonization chamber 3 to be measured, the ram beam 2 is inserted into the carbonization chamber 3, and the calcined coke is pushed out for measurement. The radiant light radiated from the furnace wall 4 is received by the light receiving surface 9a of the prism 9 and is reflected by the reflecting surface 9b.
At a right angle, and go straight through the duct 11 to reach the thermometer 1
When the light is received at 0, the temperature is measured. In this way, the temperature of the furnace wall 4 in the next carbonization chamber 3 to be measured is measured while sequentially moving the ram beam 2. Further, in order to prevent dust in the carbonization chamber 3 from adhering to the light receiving surface 9a of the prism 9, air is jetted from the air purging pipe 12 to clean and maintain a clean surface.

It should be noted that the duct 11 is not always necessary when the influence of disturbance such as dust and smoke in the carbonization chamber 3 during measurement is small, or when the thermometer is strong against disturbance such as a two-color thermometer.

The reflected light from the prism 9 can be introduced into the thermometer 10 using an optical fiber (not shown). As the optical fiber, a well-known optical fiber such as an optical fiber having a single wire, a fiber rot, a bundle fiber in which a large number of optical fibers are bundled, an image guide, and the like are used. When an optical fiber is used, one end surface of the optical fiber is brought into contact with the rear surface 9c of the prism 9 and the other end surface is brought into contact with the light-receiving surface of the thermometer 10. However, each end surface of the optical fiber, the prism 9 and the thermometer. It is desirable to provide a lens between each of them. In order to avoid disturbance, it is desirable that these abutting portions are adhered to each other with a high temperature adhesive such as ceramics and covered with a light shielding material. When using an optical fiber with low heat resistance, cover the optical fiber with a protective tube and introduce a cooling gas into the gap between the protective tube and the optical fiber, or cover the optical fiber with a double tube and use this double tube. It is carried out by a method of introducing a cooling gas or liquid into the tube.

As described above, the present invention provides a prism at the tip of a ram beam to be inserted into a carbonization chamber by an extruder, receives radiant light from a furnace wall, reflects the light from the furnace, and then reflects it from the prism. Since the temperature of the furnace wall surface can be directly measured by receiving the reflected light with the thermometer installed at the rear end of the ram beam, the accurate temperature inside the carbonization chamber can be measured quickly and with no error. Since it can be measured without measuring, the temperature distribution on the furnace wall surface can be known in an extremely short time, and the furnace temperature management can be automatically controlled. Further, there are effects such as improvement of work efficiency by homogenizing the furnace temperature, reduction of unit of heat source and extension of life of the furnace body, and there is an advantage that it is extremely useful for management of coke manufacturing conditions.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a side view of FIG. In the figure, 1 is an extruder, 2 is a ram beam, 3 is a carbonization chamber, 4 is a furnace wall, 5 is a combustion chamber, 6 is a guide wheel, 7 is a hood, 8 is a fire engine, 9 is a prism, 10 is a thermometer, 11 is a duct, 1
Reference numeral 2 is an air purging pipe.

Claims (1)

[Claims] 1. A coke oven in which an extruder equipped with a ram beam is movably provided so that cokes in a plurality of carbonization chambers are sequentially extruded by the ram beam, and the carbonization is performed by a prism provided in front of the ram beam. Radiant light from the furnace wall of the chamber is reflected in the longitudinal direction of the ram beam,
A method for measuring a furnace wall temperature in a coke oven carbonization chamber, characterized in that the reflected radiant light is received by a thermometer provided at the rear portion of the ram beam to detect the furnace wall temperature.