2. BALANCE OF PLANTS
Boi ler
Fuel Oi l Pump House
CW Pump House
Compressed Air System
Hydrogen Plant
Raw water pump house
DG Set
MMD-BOP 2
3. BOILER
74 meters long.
two passes with platen super heaters.
The boiler's four corners are designated as
A,B,C,D for communication purpose
4. FIRST PASS
At bottom, leftover ash eliminated from
chimney and electrostatic precipitator (esp) is
collected in bottom ash hopper
collected ash mixed with water is sent to the
ash water pond.
5. FIRST PASS
From 22 metres to 37 meters the furnace is
situated
The furnace is divided into17 partitions
designated as AA, A, AB, B, BC till HH from top
to bottom.
Partitions designated with single letters have
inlets through which raw materials like coal,
air, water and different oils are sent through.
Oils are pumped using oil guns.
6. From 56metres to 74 the final super heaters
exist along with platen heaters and roof
heaters.
There exist water walls all along the boiler.
There exist soot blowers at particular height to
blow the ash that is left over after combustion
process
8. SECOND PASS
Contains the economiser, low temperature super heater, low
temperature re-heater, air pre heater, force draf t fan, induced
draf t fan and scanner fan.
The second pass focuses primarily on increasing ef ficiency.
9. WORKING OF A BOILER
The boiler is initiated by firing light diesel oil
(LDO) along with air and coal.
LDO is pumped through the oil guns that are
situated at the eight corners in a tangential
direction.
LDO is used until the temperature reaches 400
degrees Celsius after which high fluid oil (HFO) is
used.
The gases that are produced after combustion of
coal are called flue gas which is used up in
economizer and Pre-heaters
10. FIRST PASS
The dam water enters through the economiser
through feed pump.
Gets pre heated in the economizer and enters the
bottom ring header from where the water enters
the spiral water walls in the boiler in pass 1.
The water walls heat the water and send them
over to roof heater and then to low temperature
super heater next to the platen heater and then
to final super heater where most of it is
converted to super critical fluid.
11. SECOND PASS
This super critical fluid comes back to boiler
to reheat through re-heater line.
This liquid passes through the economiser in
pass 2 then to low temperature re-heater
Then back to final super heater
12. The soot blowers blow the ash with help of
steam to the bottom ash hopper.
The air preheater heats the secondary air
along with primary air so that the efficiency is
increased. Secondary air is used when there is
excess need of air in the furnace. This
secondary air is blown through force draft fan.
The scanner fan present in the boiler is used
to cool the sensors present in the boiler
The induced draft fan is used to remove or
suck the flue gas from the boiler
13.
14. FUEL OIL SYSTEM
Providing Auxiliary Ignition Energy to coal -air mixture
Total Ignition Energy = Inherent Ignition Energy + Auxiliary
Ignition Energy
When heat becomes stable, heat avai lable from combustion
of coal exceeds Total Ignition Energy, no more Auxiliary
Energy is required
MMD-BOP 14
15. FUEL OIL HANDLING SYSTEM
Unloading through Unloading pumps.
Storing in Storage tanks.
Transferring to Day oi l Tanks
MMD-BOP 15
17. COOLING WATER SYSTEM
Circulate CW in condenser and condensing turbine exhaust
system
Discharge valve is hydraulic operated
Discharge water used to cool motor windings
MMD-BOP 17
18. CW PUMP SPECIFICATION
Manufacture KIRLOSKAR BROTHERS LIMITED
Pump type BHM135, Single stage, Sel f water lubr icat ing pump
Motor Rat ing 3600 KW
Speed 330 RPM (NOM)
Make WEG
Motor Weight 35300 KG
Pump Discharge 39825 M^3/HR
Total Head 26 M
Pump Ef f iciency 92 %
Pump Input 3049.73 KW
Type Three phase induct ion motor
Power 3600 kw
Speed 330 rpm
Frequency 50Hz
Duty S1
Vol tage 11kv
Cur rent 245.5 amp
Insulat ion class F
Ef f iciency 96( -2%)
MMD-BOP 18
Notas do Editor
The boiler at Adani power Maharashtra limited is 74 meters long. It has two passes with platen super heaters.
The boiler's four corners are designated as A,B,C,D for communication purpose if there is any maintenance to be done at any particular corner.
In pass 1 at the bottom is a bottom ash hopper which collects leftover ash in the boiler after most of it is eliminated from chimney and electrostatic precipitator (esp).
The collected ash mixed with water is sent to the ash water pond.
the furnace is situated from 22 metres to 37 meters .
The furnace has been divided into17 partitions.
These 17 partitions are designated as AA, A, AB, B, BC till HH from top to bottom.
The partitions designated with single letters have inlets through which raw materials like coal, air, water and different oils are sent through.
Oils are pumped using oil guns.
the final super heaters exist From 56 to 74metres along with platen heaters and roof heaters.
In pass 1 there exist water walls all along the boiler.
There exist soot blowers at particular height to blow the ash that is left over after combustion process
Pass 2 contains the economiser, low temperature super heater, low temperature re-heater, air pre heater, force draft fan, induced draft fan and scanner fan.
The second pass focuses primarily on increasing efficiency.
The boiler is initiated by firing light diesel oil (LDO) along with air and coal.
LDO is pumped through the oil guns that are situated at the eight corners in a tangential direction which makes a spherical fire ball at the center of the furnace.
LDO is used until the temperature reaches 400 degrees Celsius after which high fluid oil (HFO) is used. HFO has high calorific value which helps the coal burn in the furnace.
The gases that are produced after combustion of coal are called flue gas which contains mostly greenhouse gases.
The dam water enters through the economizer through feed pump.
The water gets pre heated in the economizer (by the heat of the flue gases) and enters the bottom ring header from where the water enters the spiral water walls in the boiler in pass 1.
The water walls heat the water and send them over to roof heater and then to low temperature super heater next to the platen heater and then to final super heater where most of it is converted to super critical fluid.
This super critical fluid after passing through high pressure heater then comes back to boiler to reheat through re-heater line.
This liquid passes through the economizer in pass 2 then to low temperature re-heater then back to final super heater then again to turbine.
The soot blowers blow the ash with help of steam to the bottom ash hopper.
The air preheater heats the secondary air along with primary air so that the efficiency is increased.
Secondary air is used when there is excess need of air in the furnace.
This secondary air is blown through force draft fan.
The scanner fan present in the boiler is used to cool the sensors present in the boiler
The induced draft fan is used to remove or suck the flue gas from the boiler