The secondary chamber must comply with the following minimum criteria:
“• Heavy steel construction
small scale incinerators
• An excess air and high temperature operational mode.
• Sufficient size and appropriate geometry to achieve a gas temperature of at least 1000 Celsius for a retention time of at least 2 seconds when pre-heated and correctly operated.
• Sufficient forced air inflow and airflow and fuel supply controls to ensure an exhaust gas oxygen content range of 6-12% at all times.
• Hot face refractory concrete-ceramic suitable for thermal shock up to 1400 Celsius and abrasion. Minimum thickness 150mm.
• Cold face refractory lining of calcium silicate or superior material, minimum thickness 100mm.
• Refractory lining of all the ducts shall be done with refractory castings. Superior quality ceramic wool shall be used at all hot duct flanges and expansion joints
• An electrically powered fan forced air supply, with the capacity for variation by the operator.
• One or more fuel burners designed to use diesel fuel type 2 (vehicle standard) equipped with a spark igniter.
• A digital thermometer with connected to an electronic datalogger. The thermometer shall be located on the chamber wall away from the fuel burner.
Medical Waste Incineration Treatment
Average 1000-1500 kg/hour
PLC(Programmable Logic Controller Incinerator)
A heat exchanger to pre-heat air destined for the primary chamber is not compulsory but recommended.
The combustion air systems and fans shall be designed to ensure high combustion efficiency and avoid a reducing (corrosive) atmosphere, incomplete burnout of the flue gases and related problems. It should also be possible to heat the primary air from 10°C to approximately 145°C, depending on the waste composition and moisture content.
“The incinerator shall be designed and equipped to be installed, commissioned and operated in such a way as to prevent emissions into the air giving rise to significant ground-level air pollution; in particular, exhaust gases shall be discharged in a controlled fashion by means of a stack the height of which is calculated in such a way as to safeguard human health and the environment.
All incinerators shall meet the following emission and operating standards:
• Combustion efficiency (C.E.) shall be at least 99.0%
• The combustion efficiency shall be computed as follows:
• The diameter of the stack shall be selected by the Contractor to deliver an exhaust exit velocity of not less than 10 metres per second vertically upwards when at full scale operation.
• An emission stack sampling port shall be included immediately above the secondary chamber.
Controlled hygienic, mechanical or automatic feeding methods must not negatively influence the air supply and temperature in the primary and secondary chambers of the incinerator.
“Each unit shall include a diesel fuel storage tank of sufficient capacity to enable operation of the unit for 5 working days of 10 hours each.
• The unit shall include a pumping system and lines to supply the burners from the tank and the diesel-electric generator. The pumping system will have two pumps in parallel for redundancy.
• The supply lines will be fabricated from steel tubing and adequately protected and supported against damage during operations and include shutoff valves for each line.
• The unit shall be equipped with a fuel meter.
“Incinerators must be able to support different power sources (PV solar system , diesel Electric generator , local or compound mini-scale grid)
The proposed incinerators shall be able to be completely packed into a series of 20ft export standard sea containers.
All electrical connections attached with the incinerator and other machinery should be provided with suitable and necessary safety devices and be protected by steel conduits, cable trays, and supports.
The manufacturer should permanently mark on the incinerator indicating: (i) manufacturer’s name or trademark (ii) style, type, model or, date of manufacture of the incinerator (iii) capacity in terms of net designed heat release in heat units per timed period (i.e., British Thermal Units per hour, mega joules per hour, kilocalories per hour).
“The unit shall be supplied with a lockable operations store, that shall be initially supplied with the following consumables:
• A first aid kit, suitable for addressing the hazards presented by the unit.
• 5 full sets of personal protective clothing and equipment.
• Operating logbooks.
• Unit cleaning equipment.
• Unit routine maintenance equipment and associated spare parts.
• Lubricants as appropriate.
• 3 Fire extinguishers.
• Any other consumables considered necessary by the Supplier.