The company offers several tips on how to inspect burners for efficient operation while the heater is online.
- Visually inspect the heat patterns on the wall.
- Look for tramp air sources around tube seals, sight doors and mounting locations.
- Visually inspect the flames; they should be uniform and free from soot.
- Monitor the fuel composition to ensure the supply temperature is at a safe margin above the dew point to avoid liquid carryover and tip plugging.
- Monitor the burner supply pressure, temperature, flow and composition; increases in pressure are an indication of tip plugging.
- Monitor burner inlets for restrictions.
- Inspect tile for pitting, cracking, glassing and an increase in tile porosity.
- When the heater is offline and entrance is allowed into the furnace, there are some additional inspections that can be performed.
- Inspect tile for pitting, cracking, glassing and an increase in tile porosity.
- Examine refractory for improper insulation coverage.
- Inspect and clean fuel-gas headers during scheduled turnarounds.
- Look for tip plugging/coking while the heater is offline.
- Check all burner dampers for proper operation; replace any that do not operate through the complete range of motion.
- If possible, smoke test the furnace under positive pressure during scheduled maintenance to identify any sources of tramp air leakage.
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