Medical waste incineration system
Medical waste incineration system of 300 kg/hr burn rate with dual fuel (gas and diesel) type, daily 8-16 hrs operation and a stack height of 15 meter.Primary combustion
i. The primary combustion chamber shall be accepted as the primary combustion zone;
ii. The minimum combustion temperature of the primary chamber shall not be less than 800 degrees C;
Secondary combustion
The residence time in the secondary chamber shall not be less than 2 seconds;
The gas temperature as measured against the inside wall in the secondary chamber, not in the flame zone, shall not be less than as indicated in Lots 1-7 ;
Both the primary and the secondary temperatures shall be maintained until all the waste has been completely combusted;
Chimney
The chimney shall have a minimum height of 4 meters above ground level;
The minimum exit velocity of the emissions shall not be less than 10 metres/second;1. Capacity of destruction in weight: 60 Kg/h.
2. It should be able to operate not less than 10 hours/day
3. This incinerator must be able to destruct all combustible wastes produced by hospitals, private clinics, laboratories, institutes, etc…
4. Design Specification : Types A, B, C, D, and E of medical waste
5. “PYROLYTIC” combustion, by controlling the gasification of waste.
6. The incinerator must avoid the release of black smoke and fine dust, (Smokeless) during the loadings.
7. It should be able to reduce the volume of wastes by 98%.
8. It should be able to hold emission in the second burn with gas residence of not less than 2 seconds.
9. The incineration should be completely free from visible smoke as well as offensive odours.
10. The lower calorific power (L.C.P) of this waste will be 3,500 kcal/kg
• The Temperatures of combustion: Minimum will be 850oC and max 1400oC
• Post combustion: >1100oC.
11. The Internal diameter of the Chimney: Ø 400 and its height: 8 m
12. The Volume of the combustion chamber: 1.200 L
13. The Dimension of the door for loading in cm: 70×70.
14. Burner operation should be Automatic On/Off
15. Fuel : diesel
16. The supplier must provide necessary information for the best of the installation
This incinerator with “PYROLYTIC” combustion must have:
17. A combustion chamber of waste:
* Perfectly tight door for the manual loading of waste. The loading should be Manual, Batch Load
* A burner of lighting which the use is limited to the ignition of waste.
* Frontage of loading with door seals gone up on hinges, wheel of screw plug, flexible joint, and stuffing insulating out of refractory.
* The insulation of the combustion chamber should be composed of refractory bricks, having a high content of aluminium and insulates bricks in order to assure a minimum temperature on the outside sheet metal.
* Composition of the refractory;
• Refractory concrete :
. Thickness : ≥100 mm
. Nature: 42% of Al203
• Insulate in fibrous panels :
. Thickness: ≥75 mm
• Nature: Calcium silicate.
* Burner of lighting of waste, with fuel, standard mono-bloc casting guiding plunging flame, lighting and safety of electronic ignition, permanent ventilation, electromagnetic sluice gate of regulation and isolating valve.
* Plate of combustion in Carborundum, avoiding the fixing of glass and slags.
18. A chamber of post combustion of gases
* A burner of combustion of gases,
* A device of injection of air allowing a total recombustion of gases,
* A device of air inlet of cooling of waste gases,
* A sheath of evacuation of the gases burnt.
* Carcass in strong sheet steel with support of connection.
* Composition of the refractory;
• Refractory concrete :
Thickness : ≥150 mm
Nature: 65% of Al203
• Insulate in fibrous panel :
Thickness: ≥85 mm
Nature: Calcium
* Burner with fuel, mono-bloc casting guiding type with horizontal flame, lighting and safety of electronic ignition, permanent ventilation, electromagnetic sluice gate of regulation and isolating valve.
* A secondary injection of air to ensure perfect oxygen content.
19. A control box ensuring the complete cycle of combustion.
20. Fan:
* Electro-ventilator distributing the secondary air, the regulation of the air flow being carried out by valves and following the control of the automatic cycle.
21. Controls and regulations:
Control box watertight to dust, including:
* A switch circuit breaker for each engine (ventilators and burners).
* A timer with adjustable temporization for the regulation of each burner.
* A regulator with digital watching for the temperature of combustion.
* A regulator with digital watching for the temperature of postcombustion.
* Electric box.
21. The de- ashing must be done in the bottom of the combustion chamber or the deashing should be Automatic or manual batch de ashing.
22. Process Filtering system: Scruber to be mentionned as optional
23. Emission Standards Compliance: BS 3316 or équivalent standard
23. Capacity to treat Plastic: Not less than 40% by weight
24. CE Manufacturing Compliance: BS EN 746-2-1997
22. The supplier must give batches of spare parts of first urgency and consumable of the incinerator.
23. The installed incinerator must bear a one year guarantee.
24. The supplier shall perforn an onsite installation of the incinerator.
25. The technical training of operators will have to be provided and given by a technician
from the factory; it will consist of curative and preventive maintenance, and the use of machine, etc
