The air preheater is a key piece of equipment in the boiler system. It utilizes the residual heat of flue gas to heat the air required for combustion, significantly enhancing the boiler's efficiency. Its core function lies in recovering heat energy and lowering the flue gas temperature, thereby reducing fuel consumption and emissions. It is widely applied in power stations, industrial boilers, and other fields, effectively achieving energy conservation, consumption reduction, and economic benefit improvement.