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INCINERATION OF MSW - Coggle Diagram
INCINERATION OF MSW
Flue Gas Pollutant
SOx
- combustion and in large quantity
- effect health problem for people have asthma and bronchitis
Particulate matter
- should keep minimum
- serious health can be effected due to inhalation particle
- incinerator should equipped control devise such as cyclone, settling chamber
NOx
NOx form from
- reaction between oxygen and nitrogen at high temperature
- reaction between nitrogen and oxygen form fuel
CO
- cause by inefficient combustion
- high CO can give poor performance and health effect such as headaches and nausea
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Technology advancement
Advance Thermal Treatment (ATT)
- exclude incineration with considered mature
- principally pyrolysis & gasification
-recover heat, electricity or fuel
Modern Incinerator
- equipped with pollution improvement system to clean the flue gas and toxicant
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Emission Control Device
- Baghouses
- Acid Gas scrubber
- Electrostatic Precipitator
Advantages
- Volume and weight reduces incineration can be dine in generation site
-air discharge can be controlled
- ash residue is sterile, inert
Diasadvantages
- Some material require supplemental fuel
- Public disapproval
- High capital cot
Type of Incinerator
4) Fixed Grate
- older version for grate
- lined is brick while ash pit is made of metal
- has opening at top, side of grate is left open
Fluidized Bed
- air blown in high speed over sand bed
- waste required segregation and size reduction
- dees rate is small to ensure efficiency
3) Rotary Kiln
- used by municipalities and large industries
- in primary chaber, solid turm to gas by volatilization, destructive distillation and partial combustion reaction
- second chambest is to complete the gas phase combustion reaction
Special Incineration
- furniture factory sawdust incinerators need attention since it need to handle resin and flammable substances
2) Burn Barrel
- more controlled form of private waste incineration
- containburning material inside metal barrel
Moving Grate
- capable for haauling waste from combustion chamber to give complete combustion
1) Burn Pile
- also known burn pit is simplest and earliest waste disposal
- consist of a mound of combustible materials pile on ground and set on fire
- can spread uncontrolled filre
Waste-to-Energy-Process
1- waste is poured in grate with help of crane
2- waste move toward ash pit. waste is treated and water is use to wash out ash
3- air flown through waste and it function for cooling grate
4- air is blown another time and faster than previous
5- This helps in complete burning of flue gas with introduction of turmoil for better mixing and excess oxygen