How to avoid fire and explosion accidents of condensing boiler

　　After the condensing boiler catches fire and explodes, the impact of powerful air waves and a large amount of splashing of boiling water are formed. Not only the body of the boiler is destroyed, but the surrounding equipment and buildings will also be severely damaged. Even causing personal injury and death, the consequences are very serious. Therefore, to avoid dangerous accidents, we must first understand why the condensing boiler explodes.

　　1. Reasons for the explosion of the condensing boiler:

　　1. Overpressure: The operating pressure exceeds the maximum allowable pressure of the condensing boiler, the steel plate (tube) stress increases beyond the limit value, and the safety valve fails. When the rated pressure is reached, the automatic exhaust steam and pressure reduction cannot be performed.

　　2. Overheating: The working temperature of the steel plate (tube) exceeds the limit value and cannot withstand the rated pressure and breaks. This is mainly caused by severe water shortage or thick scale on the heated surface.

　　For example, stove firemen violate labor discipline, leave their posts or sleep at night and cause overpressure or severe water shortage and then enter cold water; no water quality treatment or water quality treatment does not meet the requirements; no regular inspections; stove fire personnel technically unskilled, misuse and other Overpressure and overheating caused by poor management.

　　3. Corrosion, cracks and grooving: the inner and outer surfaces of the condensing boiler steel plate are corroded and thinned, the strength is significantly reduced, and cannot withstand the rated pressure and rupture; improper operation during long-term operation will cause the boiler to suddenly cool and heat or the load will fluctuate frequently, and the steel will undergo alternating changes Fatigue cracks are caused by stress, and cracks are caused by grooves due to the combined effect of corrosion.

　　4. Congenital defects: the use of unreasonable fillet weld structure in design, incorrect strength calculation, improper materials, poor manufacturing, installation and repair processing techniques, especially unqualified welding quality and other hidden dangers, expand and develop in use until An explosion occurred.

　　5. The safety accessories are incomplete and not working. (Pressure gauge, safety valve and water level gauge)

　　Therefore, the above reasons should be avoided during boiler operation.