The Application of Online Fixed Thermometer in Refractory Material Factory
The measurement and control of online temperature detectors is an important link in the production of refractory materials, and the quality of kiln temperature control will directly affect the quality of products. Especially for tunnel kilns, they have the characteristics of multiple temperature measurement points and long continuous working hours. If the temperature parameters are not well controlled, it will bring significant economic losses to the production enterprise. Therefore, selecting appropriate online temperature measuring instruments 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 thermoelectric coupling for temperature measurement. The characteristic of this method is high temperature measurement accuracy, which can be connected to a recorder or control system for closed-loop control. Its disadvantage is short service life, especially in high-temperature kilns above 1200 ℃ where the electric coupling consumption is extremely high, the price is also very expensive, and the equipment operation cost is high** The first 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 the high-temperature area, it has a long service life, but has low measurement accuracy, no electrical signal output, and cannot be automatically recorded. There are also human factors that affect its authenticity. The application of JTCSI series online infrared temperature detectors can effectively overcome the above shortcomings. This instrument has high measurement accuracy (up to ± 0.1%), and can output electrical signals like thermocouples for automatic recording and control. It also has advantages such as 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. In the application of JTCSI series infrared temperature detectors in tunnel kilns, according to different user requirements, there are two commonly used methods: single point temperature measurement and multi-point switching temperature measurement. The introduction is 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. Connect the 4-20MA analog signals output from each unit's instrument box to a multi-point recorder or control actuator, and communicate with computers, printers, and other devices through RS-232 ports for data. The temperature measurement unit in this system usually uses JTCIN type instruments with high accuracy and strong functionality.
Switching temperature measurement system: This system processes signals by connecting the infrared probe signals installed at each temperature measurement point to a JTCIN type multi-point thermometer. And respectively output 1-5V temperature signals corresponding to each temperature measurement point for recording by multi-point recorders. At the same time, temperature data can also be directly input to a computer through the RS232 port for analysis and processing by the computer. It can also be directly printed out by connecting to a printer.
Among the above two solutions, the single point temperature measurement system has an independent temperature measurement and signal processing system for each temperature measurement point, and its output analog and digital signals are real-time continuous signals with fast response speed. It can serve as a real-time control signal for the control execution mechanism to achieve closed-loop control. The multi-point switching temperature measurement system, although its output analog signal is also continuous, has a certain lag with the real-time temperature value, so it can only be used for data acquisition and recording, and should not be used as a control signal. Its advantage is good cost-effectiveness, which can reduce equipment costs in situations where the usage requirements are not too high.
