China Customized Air Preheaters of Different Materials Specifications

How does the air preheater prevent fires?
The air preheater is a kind of equipment in which the flue gas in the flue at the tail of the boiler preheats the air before entering the boiler to a certain temperature through the internal radiating fins. It can be used to improve the heat exchange performance of the boiler and reduce energy consumption. According to the heat transfer mode of the air preheater, it can be divided into two categories: thermal conductivity and regenerative. How do we prevent fires such as sudden situations?
To minimize the deposition of unburned combustibles on the air preheater, the key is to completely burn the fuel. First of all, when using oil for ignition and low-load fuel injection, the oil temperature, oil pressure, and vapor pressure should be appropriate to ensure good oil atomization and correct air distribution; the oil gun is not blocked and does not leak; the combustion is stable and sufficient to minimize Unburned combustibles. Secondly, strengthen the monitoring of the air preheater before starting the unit. If it is found or judged that the air preheater has a large amount of unburned combustible material, it must not be put into hot operation and must be cleaned with water. Then dry. It should also be ensured that the soot blower can be put into normal operation and the soot blowing medium parameters are qualified. Later, during the operation process, especially after starting, restarting after hot standby, and after the air preheater suddenly stops and the furnace is shut down, the end temperature of the air preheater (air preheater flue gas inlet and outlet temperature) should be closely monitored. If the temperature at one or more points rises abnormally, analysis and research should be done immediately to find a fire in time.