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

Materials of construction: The incinerator shall not have any asbestos, asbestos-containing substances, mercury thermometers, and mercury switches. Refractory materials shall be able to meet relevant standards under ISO TC33 and CEN/TC                                                                               187.

Types of incinerator design acceptable: Dual-chamber controlled air incinerator or dual- chamber pyrolytic incinerator

Waste feed system into the combustion chamber batch or continuous loading: For continuous loading, the automatic charging ram or auger feed system shall be capable of injecting small amounts of waste at frequent intervals and should be able to prevent waste from being fed when the combustion chamber temperature is less than 850°C. In addition, the waste feed should only be able opened at or below 50°C in an ambient temperature of 21°C.

Primary combustion chamber: Shall be constructed with a casing (reinforced to withstand internal pressures without deflection or damage to the refractory or other components) supported by a structural frame and provided with refractory lining and insulation

Access doors, openings, and gaps: All access doors, openings, and gaps shall be sealed to prevent emission of smoke and exhaust gas and to block admission of air during incinerator operations. Doors exposed to flame or direct heat of combustion gases shall be lined with the same type and thickness of refractory lining and insulation as that used in the combustion chamber

Grate system for the primary chamber Moving grate, traveling grate, reciprocating grate, or rotating drum grate

Equipment Double chamber medical infectious waste incinerator Capacity 10-30 kg per hour Characteristics of waste

Mainly syringes and needles from immunization routine and campaign activities. However, the following average characteristics are considered*:

heating value above 2000 kcal/kg (8370 kJ/kg); content of combustible matter above 60%; content of non combustible solids below 5%; content of non-combustible fines below 20%; moisture content below 30% by weight

Combustion performance: The medica waste incinerator shall be capable of reducing waste to ash not exceeding 10% of the total combustible charges.

Outdoor installation. The medical waste incinerator will be installed outdoors.         All incinerator components shall be suitable for but not limited to outdoor shaded installation, including electric motors, be resistent to corrosion, moisture and related weather elements.

In our area and vicinity there are few municipal garbage waste dumping site. We are facing lot of difficulty like foul smell, emmissions of toxic gases and CO2 gases. Since we believe in green energy we wish to convert this waste into power.

On this context to convert municipal waste to power we happened to visit a plant in Delhi , India where they are handling and burning the wastes to produce power. We saw the process and came to know that the plant was supplied from China.

Since most of the municipal corporations in India have got various dumping yards it will not be ideal to install a central disposal unit  and therefore small plants of this type will be suitable.