Where is a pyrometer typically located on a boiler?

A pyrometer is an instrument used to measure the high temperatures of different parts of a boiler. Its typical location within a boiler system is crucial for accurately reflecting the combustion temperatures, which are essential for monitoring performance and ensuring safe operations.

When placed in the hot gas passages and refractory, the pyrometer can effectively measure the temperature of the exhaust gases after combustion has occurred. This location allows for the assessment of combustion efficiency, helping engineers determine how well the fuel is being utilized and whether any adjustments are needed to optimize performance or reduce emissions.

Measuring temperatures in the hot gas passages is particularly important because it provides data that influences the efficiency of heat transfer to the water or steam within the boiler. Furthermore, understanding the temperature profiles in this area aids in preventing damage due to overheating, ensuring both safety and longevity of the boiler unit.

Other locations, such as within the water wall or at the feedwater input, would not provide accurate data regarding the high-temperature combustion process, while any placement near the flue gas exit would only measure temperatures after significant heat has been lost from the exhaust, leading to less reliable data about the combustion process itself.