After investigation, it was found that the boiler burner was defective. After the boiler was shut down, the burner was inspected and it was found that the blunt bodies of each burner were worn and deformed greatly. In particular, the blunt body of the burner had fallen off due to wear, and the normal aerodynamic conditions in the furnace were destroyed, resulting in a decrease in the stability of combustion in the furnace. When the combustion conditions in the furnace were greatly disturbed (such as coke falling in the furnace), the boiler was prone to fire extinguishing.
How to prevent boiler burner fire extinguishing?
1. Further strengthen the training of operating personnel. Improve the technical level of operating personnel through technical lectures, on-site technical examinations, etc.; improve the ability of operating personnel to handle accidents through accident anticipation, anti-accident exercises, etc., and avoid the expansion of burner fire extinguishing accidents.
2. Strengthen the inspection and maintenance of equipment, especially the shutdown of standby units. If equipment hidden dangers are found, such as wear and fall of the burner blunt body, notify the maintenance personnel in time to deal with them.
3. Strengthen the management of the blending of coal entering the furnace, reduce the variation range of the low calorific value of coal entering the furnace, especially the coal quality, to avoid coking in the boiler furnace due to changes in coal quality (high low calorific value), and disturb the combustion conditions in the furnace when large pieces of coke fall, causing boiler fire accidents. When the low calorific value of the coal entering the furnace is too high, it is easy to cause coking in the furnace; when the low calorific value of the coal entering the furnace is too low, it is easy to cause unstable boiler combustion, the main steam pressure of the boiler cannot rise, and the unit cannot carry the load. How to blend more appropriately needs further research.
4. Strengthen the regulation of boiler combustion to avoid the generation of reducing gas due to oxygen-deficient combustion of coal, which reduces the ST value of coal and causes coking in the boiler. In addition, adjust the air distribution in the furnace according to the coal quality to avoid coking in the furnace due to the deflection of the flame in the furnace and the wall.
After investigation, it was found that the boiler burner was defective. After the boiler was shut down, the burner was inspected and it was found that the blunt bodies of each burner were worn and deformed greatly. In particular, the blunt body of the burner had fallen off due to wear, and the normal aerodynamic conditions in the furnace were destroyed, resulting in a decrease in the stability of combustion in the furnace. When the combustion conditions in the furnace were greatly disturbed (such as coke falling in the furnace), the boiler was prone to fire extinguishing.
How to prevent boiler burner fire extinguishing?
1. Further strengthen the training of operating personnel. Improve the technical level of operating personnel through technical lectures, on-site technical examinations, etc.; improve the ability of operating personnel to handle accidents through accident anticipation, anti-accident exercises, etc., and avoid the expansion of burner fire extinguishing accidents.
2. Strengthen the inspection and maintenance of equipment, especially the shutdown of standby units. If equipment hidden dangers are found, such as wear and fall of the burner blunt body, notify the maintenance personnel in time to deal with them.
3. Strengthen the management of the blending of coal entering the furnace, reduce the variation range of the low calorific value of coal entering the furnace, especially the coal quality, to avoid coking in the boiler furnace due to changes in coal quality (high low calorific value), and disturb the combustion conditions in the furnace when large pieces of coke fall, causing boiler fire accidents. When the low calorific value of the coal entering the furnace is too high, it is easy to cause coking in the furnace; when the low calorific value of the coal entering the furnace is too low, it is easy to cause unstable boiler combustion, the main steam pressure of the boiler cannot rise, and the unit cannot carry the load. How to blend more appropriately needs further research.
4. Strengthen the regulation of boiler combustion to avoid the generation of reducing gas due to oxygen-deficient combustion of coal, which reduces the ST value of coal and causes coking in the boiler. In addition, adjust the air distribution in the furnace according to the coal quality to avoid coking in the furnace due to the deflection of the flame in the furnace and the wall.