Application of Online Fixed Thermometers in Refractory Plants
The measurement and control of online thermometers are important links in the production of refractory materials, and the quality of furnace temperature control will directly affect the product quality. Especially for tunnel kilns, they have the characteristics of multiple temperature measurement points and long continuous working time. If the temperature parameters are not well controlled, it will bring significant economic losses to the production enterprise. Therefore, choosing appropriate online temperature measurement methods is an important link to ensure the normal operation of the kiln. There are two traditional temperature measurement methods for tunnel kilns: one is to use thermocouple temperature measurement, which is characterized by high temperature measurement accuracy and can be connected to recorders or control systems for closed-loop control. Its disadvantage is short service life, especially in high-temperature kilns above 1200 ℃, where the electrical coupling consumption is extremely high, the price is also expensive, and the equipment operating cost is high; **One method is an optical handheld infrared thermometer, which measures temperature based on the color of the object being measured. As it does not directly contact high-temperature areas, it has a long service life, but low measurement accuracy, no electrical signal output, and cannot automatically record. It is also affected by human factors, resulting in poor authenticity. The application of JTCSI series online infrared thermometers can effectively overcome the above shortcomings. This instrument has high measurement accuracy (up to ± 0.1%), and can output electrical signals like a thermocouple for automatic recording and control. It also has the advantages of long service life (more than five years), simple operation, and small human error. Therefore, the JTCSI series infrared thermometer is an ideal temperature measuring instrument for high-temperature tunnel kilns. The JTCSI series infrared thermometer is commonly used in tunnel kiln applications, with two solutions: single point temperature measurement and multi-point switching temperature measurement, according to different user requirements. They are introduced as follows:
Single point temperature measurement system: Each temperature measurement point is composed of a probe and an instrument box,
The temperature measurement unit collects temperature data. Then connect the 4-20mA analog signals output from each unit instrument box to a multi-point recorder or control actuator, and communicate data with devices such as computers and printers through the RS-232 port. The temperature measurement unit in this system usually uses JTCIN type instruments with high accuracy and strong functionality.
Switching temperature measurement system: This system connects the infrared probe signals installed at each temperature measurement point to a JTCIN multi-point thermometer for signal processing. And output 1-5V temperature signals corresponding to each temperature measurement point for recording by multi-point recorders. At the same time, the temperature data can be directly input into the computer through the RS232 port for analysis and processing. It can also be directly printed out by connecting to a printer.
