What causes severe overheating of the boiler’s explosion vent?
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Our company is using a 10T low-pressure steam boiler. After about a year of operation, it was recently found that the temperature at the explosion-proof door has reached around 430 degrees. The load remains relatively constant; what could be the cause?
What is the maximum boiler load that can be reached? Is there severe ash buildup inside the furnace? Superheaters, economizers – these places
What type of furnace do you have? Where is the door? It might be due to severe dust accumulation in the heating tubes
It is a horizontal furnace; the fuel we use for burning is usually paraffin oil or natural gas, so ash accumulation should not be too severe.
There should be flexible insulation material inside the explosion-proof door; has it been ablated? It should be checked
1. There are issues with the boiler furnace wall lining at the explosion-proof door； 2. Detachment of the explosion-proof door lining ； 3. Combustion deflection ； 4. Flue gas leaks due to positive pressure in the furnace chamber.
Is the boiler under positive pressure? There is likely a leak.