Why is it crucial to remove materials that hinder heat transfer in a boiler?

Removing materials that hinder heat transfer in a boiler is crucial primarily to avoid overheating and the potential failure of heating surfaces. When insulation or deposits like scale or soot build up, they form barriers that significantly reduce the efficiency of heat transfer from the combustion gases to the water in the boiler. This inefficiency can lead to dangerously high temperatures on the heating surfaces as the system works harder to achieve the desired heat output. If not addressed, these high temperatures can result in damaging the materials of the boiler, leading to failures such as warping, cracking, or even catastrophic failures such as boiler explosions.

Maintaining optimal heat transfer is essential for the safety and the operational integrity of the boiler system, ensuring that it functions within its designed thermal limits. This also contributes to the overall efficiency and longevity of the boiler.