Preventing Clogging When Burning Industrial Solid Wastes in Waste Incinerators
When industrial solid waste is used as fuel, clinkering in the incinerator comes mainly from deposited unburned particles and local concentration of calorific value. Control therefore works on three fronts at once: flue gas residence, fuel preparation and furnace cleaning.
Longer flue gas residence
Enlarge the secondary combustion chamber so that flue gas residence is ≥2 seconds, letting unburned particles oxidise and break down fully and reducing the risk of carbon deposit.
Fuel preparation and additives
Crush and compact light, high-volatile solid waste and keep the particle size entering the furnace in the 50-150mm range to reduce the risk of local calorific concentration. Additives can also be used during operation to reduce the low-melting clinkering tendency of the ash.
Cleaning and furnace maintenance
Every 200 hours of operation, clean furnace deposits with an ultrasonic soot cleaner, remove clinker from affected areas with a high-pressure water jet, and repair damaged refractory promptly.
| Item | Parameter |
|---|---|
| Flue gas residence time | ≥2 seconds |
| Particle size into furnace | 50-150mm |
| Ultrasonic cleaning interval | Every 200 operating hours |
| Clinkering rate reduction | 60%-80% |
| Refractory service life | More than 5 years |
Taken together, these measures can cut the clinkering rate of an industrial solid waste incinerator by 60%-80% and extend refractory service life beyond 5 years.
