how power plant boiler works_ how combustion system in power plant boiler works

7/28/2019 How Power Plant Boiler Works_ How Combustion System in Power Plant Boiler Works

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mary Air Fan supplies the air to the pulverisers for drying and transporting coal. This air called the Primary

also is heated in the Air Heater.

ue gas system.

al burns in the furnace giving out heat and forming flue gases.

uced Draft Fan. The hot flue gases from the furnace is drawn out by the Induced draft fan. The gases

sses through the various heating surfaces of the boiler, the Electrostatic Precipitator and discharges to the

mosphere at the top of the stack. Induced Draft Fan provides the energy for this flow of flue gases. The

uced Draft Fan is normally located adjacent to the Stack.

ectrostatic Precipitators capture the fly ash in the flue gases without letting them out into the atmosphere.

gh voltage electrodes placed in the gas path ionise the ash particles which collects on collecting electrodes

d falls into ash hoppers.

ack or the Chimney disperses the hot gases and any other particles at a great height. The height enables

y large dispersion area and regulates emission concentrations at ground levels to the level acceptable to

mans and vegetation. Stack heights for large power plants are around 250 to 280 meters.

anced Draft. The Forced Draft fan and the Induced Draft fan operate in such a way that the air pressure i

furnace is at zero pressure ie: at atmospheric pressure. This is called the Balanced Draft system.

r and Flue Gas System In a Boiler

h System.

h is the inert matter in coal and is the residue after combustion. This has to be collected and disposed off

hout letting it out into the atmosphere. A part of the ash, around 15 % collects as Bottom ash at the

tom of the furnace. The other part collects as Fly ash in the Electrostatic Precipitators. The collected ash

hen transported to disposal yards or storage silos.

e above are the brief of the main equipment required for the proper combustion of coal in a large power

nt boiler.

ORKING OF A POWER PLANT BOILER

ler in a power plant has two functions. The Combustion system converts energy in coal to Heat. Water an

am system converts the heat to steam at high pressures and temperatures. This series explains the


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Discussion Community

Reply

what type of boiler mainly used in power plant...... please explain....

lokesh 10 months ago

1

Reply Pl suggest boiler design thumb rules or handbook of boiler design.

Rangrao D Patil a year ago

1

Reply

which boiler is used in modern power plant?and which boiler is the most efficient now

a days?

sintu ghara 10 months ago

0

Reply

PLEASE GIVE ME CFBC(15TON) ALL RUNNING PARAMETER

SI IWANT TO KNOW ABOUT IN RUNNIG CFBC BOILER PARAMETER

MAHENDRA CHAUDHARI 10 months ago

0

Reply

WHAT SHOULD BE METAL TEMPERATURE OF BOILER DRUM AND HP PIPING

AND WATER DURING HYDRAULIC TEST OF BOILER WHEN THERE IS TUBE LEAKAGE

Anonymous a year ago

0

Reply

The main problem is condensation of the flue gas SO2 which is highly corrosive. The

effect on power is practically zero, unless the total insulation is gone and it effects the stack

effect.

johnzactruba a year ago

0

In our boiler I.D.fans (6 Nos) outlet flue gas common outlet duct going to stack was

bare at many places due to damaged insulation.we have done the new insulation to the i.d.fan

Jayant A. Ghaisas a year ago

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how power plant boiler works_ how combustion system in power plant boiler works

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