OVERVIEW OF PMSB INCINERATOR PLANTOVERVIEW OF PMSB INCINERATOR PLANT

1.Primary Chamber

3.Secondary Chamber

4.Heat Exchanger

5.Cooling Tower

7.Rotary Contactor

8.Fabric Filter

9.ID Fan

10.Stack Outlet

6.Lime & Carbon Feeder

2.Burners

Process

BACK DOOR

ASH PUSHER

Primary chamber• The 3 hydraulically operated

rams slowly pushed ash through PC depositing ash on the burnout hearth

• Gaseous product from incomplete combustion discharged from PC are passed into ignition chamber.

WASTE BURNED

INTO ASH

• Pyrolised gases produced are mixed with excess oxygen and completely combusted with temperature of 1100°C in the secondary chamber.

• The min. residence time in secondary chamber is 2 seconds.

• The exhaust gases at 1100°C will pass into a heat exchanger and adiabatic gas quench, which reduces the temperature.

Secondary chamber

• Downpass HE needed to provide preheated combustion air

• Ceramic tubed HE : to provide hot air for exhaust gas reheat whilst cooling the exhaust gas stream

• It cannot be let to thermal shock and must clean the HE using compressed air lance through access doors

Heat Exchanger

CERAMIC TUBE

• Its function is to cool the exhaust gases to a acceptable temperature for entry to FF

• The exhaust gases are contacted with finely atomized water droplets

• Nozzle use compressed air to ensure the cooling water is finely atomized where liquid evaporated upon contact with hot gases

Cooling Tower

Rotary Contactor• Lime and carbon

contacted quencher outlet gas in rotary contactor

• Hydrated lime and activated carbon pneumatically injected into drum

• Fine particle entrained with gas stream whilst the larger one will retain within ball mill

• Lime and carbon also help to neutralized the gases and trapped larger particles

• Also called ‘stoking’ because its function is to trapped any larger particle before gas emission to open space

• Reactants injected into FF and foam coating in all surfaces

• Additional contact of exhaust gases through reactants completes the neutralization process

• Cold spots always occur on the FF casing

Fabric Filter

FILTER BAG

• Provide the energy necessary to overcome the considerable resistance to gas flow in APC Plant

• It is like ‘heart’ to APC Plant

• Equipped with vibration sensor to detect any excess vibration

Induced Draft Fan

• Cleaned incinerator exhaust gases discharged from APC plant through stack at height 20 m above ground level

• Equipped with test ports and access platform to permit emission testing

Exhaust Stack

Burners• The incinerator is

equipped with a PC ignition burner and 2 SC dual fuel burners

• PC burner ignites the waste material

• SC burners maintain desired temperature to burn the pyrolised gas

• Other parameters i.e O2, CO and CO2 must be monitored to the combustion efficiency

BURNERS

BURNER AIR FAN