Primary combustion chamber temperature # 850°C with no cold spots
Secondary combustion chamber: Shall be constructed with an exterior casing (reinforced to withstand internal pressures without deflection or damage to the refractory or other components) and provided with refractory lining and insulation
Secondary combustion chamber temperature 1100°C or higher
Secondary combustion chamber residence time # 2 seconds after the last injection of air in the secondary chamber
Primary and secondary burners: Separate electrically spark-ignited primary burners and secondary burners with automatic control shall be used to achieve the specified temperature requirements in the primary and secondary chambers. The flames of the primary and secondary burners shall not impinge on the incinerator walls or floor.
Energy source for burners Diesel fuel eil
Air supply: Air supply in the primary and secondary chamber should be regulated between 30%-80% and 170%- 120% of stoichiometric amount respectively. Suitable flow measurement devices shall be provided on the primary and secondary air ducting. The combustion air shall be supplied through a separate forced draft fan after accounting for the air supplied through burners
lnsulation: lnsulation to be used for masonry, reinforced concrete, or non-combustible material shall prevent damage to the foundation from excessive heat and shall be of a thickness to limit the outer casing to a maximum temperature of 66°C in an ambient temperature of 21°C when the incinerator is operating at full capacity.
Refractory: Refractory shall be #super duty# and heat-resistant to a minimum of 1100°C in the primary chamber and 1250°C in the secondary chamber. Refractory shall also be abrasion resistant in the prlmary chamber, constructed of plastic or castable type refractory, designed to prevent bulging and destruction due to heat stress, capable of supporting more than twice the hourly burning rate and preventing leakage of fluids, and with a minimum thickness of 11O mm for walls and hearths
Orignal From: Double Combustion Chamber Incinerators
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