Effective measures to prevent the interference of high temperature wear resistant thermocouple

Due to the different temperature range and the measured medium and the use of different high strength wear-resistant protective tube and surface modification, composite pipe type solid structure of this series of products for wear of petrochemical industry, serious protection of pipe fluidized bed boiler, coal handling system, temperature measurement of flow of clinker powder and refractory materials. And materials. To further improve the service life of thermocouple. Its performance is better than the existing wear-resistant thermocouple, won the user. Has a number of high-tech products in the international leading level, its special technology of wear-resistant materials without affecting the temperature lag, completely solve the circulating fluidized bed boiler temperature thermocouple life protection casing with wear-resistant, high temperature oxidation, sulfide, corrosion of liquid iron, limestone cement corrosion, erosion resistance, vibration resistance many technologies, the service life of the thermocouple is generally one to two years.

High temperature wear-resistant thermocouple is the power plant circulating fluidized boiler for boiling boiler, grinding machine, coal gasifier and cement kiln head series, kiln and furnace head cover, chemical, special products of high technology such as smelting high temperature wear ideal environment, G series of unique technology and formula learn widely from others'strong points, and made of wear-resistant alloy the product of ordinary stainless steel metal in the gaffe balance, metal ceramic protection tube, and the market compared to similar wear-resistant alloy protection tube, the service life is increased by 1-5 times. Due to the environmental temperature difference, temperature control point is too high, a larger vibration, the blower, the wind speed is too high, serious wear, resulting in temperature measurement is very difficult, life is very short. Wear resistant alloy general only 10-90 days on the ground through the burning damage, bent, broken, causing damage to the thermocouple, bring great losses and unnecessary trouble, the company produces G series make up for it.

In the process of modern production, the temperature sensor plays an important role. Because of its high temperature, precision, durability, and fast response time, it is one of the most commonly used measuring devices. But sometimes we use a wear-resistant thermocouple in the measurement will encounter some of the external interference.

Effective measures to prevent the interference of high temperature wear resistant thermocouple:

First, we understand the causes of interference system: use a variety of automation instrumentation and control system and actuator in the production process, signal transmission between them is small, microvolt level signals microampere level, there are tens of volts, or even thousands of volts, hundreds of amperes large signal. Both low frequency DC signal, high frequency pulse signal, etc., constitute the system is often found in the instrument and equipment signal transmission interference between each other, resulting in system instability and even wrong operation. For this reason, in addition to the performance factors of the instrument equipment itself such as anti electromagnetic interference, mostly due to the presence of potential difference between instrument and equipment signal reference point, thus forming the "ground loop" caused by the distortion of the signal transmission process. Because some equipment requirements must be grounded in order to ensure the accuracy of the measurement or to ensure safety, so it is difficult to do not ground equipment. The best way to solve this is: the use of isolated safety grid, as a result of the use of the three party isolation, so no system to the ground line, the signal line without a total of ground, thus improving the reliability of the entire system.

To solve the interference generated by the system, we are installing the thermocouple if conditions allow wear can be suspended to wear thermocouple installation, not wear-resistant thermocouple and the furnace wall brick contact between the thermocouple and the bracket is also used to wear isolation insulation. This method can be a good way to prevent high temperature leakage interference, which we call the isolation method. In another way we can make the measurement more accurate by using the compensating wire with the shield in the connection line between the wear-resistant thermocouple and instrument, so that we can make our work more convenient and effective.