Post on 23-Jun-2015
WELCOME TO
NTPC DADRI
• PRESENTED BY:• P.C SHARMA• ROLL.NO-1109631034• M.E –VIIth (B)
VGI(DADRI)
SUBMITTED TO:
MR. G.P SAHU
(ME, DEPARTMENT VGI(DADRI)
About NTPC
• NTPC, the largest power Company in India, was setup in 1975 to accelerate power development in the country.
• NTPC has installed capacity of 29,394 MW.• It has 15 coal based power stations (23,395 MW)• 7 gas based power stations (3,955 MW)• 4 power stations in Joint Ventures (1,794 MW). • The company has power generating facilities in
all major regions of the country. • It plans to be a 75,000 MW company by 2017.
NTPC DADRI
COALBASED
GAS
BASED
SOLARBASED
1820 MW
830 MW
5MW
TOTAL = 2655 MW
Coal to Electricity ….. Basics
Coal
Chemical Energy
Super Heated Steam
Pollutants
Thermal Energy
Turbine Torque
Heat Loss In Condenser
Kinetic Energy
Electrical Energy
Alternating current in
StatorMech. Energy Loss
ASHHeat
Loss
Elet. Energy Loss
WORKING OF STEAM POWER PLANT
• Coal is burnt in a boiler ,which converts water into steam.• The steam is expanded in a turbine used to drive alternator,which
converts mechanical energy of the turbine into electrical energy.• The steam expanded is condensed in a condenser to be feed into the
boiler again.
PROCESS CYCLE(RANKINE)
The most important constituents of a steam power station are:
a. Steam generating equipmentb. Condenserc. Prime mover(i.e turbine)d. Cooling towers e. Electrical equipment
Steam generating equipment includes:
• Boiler• Superheater• Economiser• Air Pre-heater
BoilerA boiler is closed vessel in which water is converted into steam by utilising the heat of coal combustion. Steam boilers are broadly classified into following two types:(a) Water tube boilers (b) Fire tube boilers
In a water tube boiler, water flows through the tubes and the hot gases of combustion flow over these tubes. Water-tube boilers are used for high-pressure boilers
Super heater
• A device which removes last traces of moisture.
• It helps in reduction in requirement of steam quantity.
• steam being dry reduces the mechanical resistance of turbine.
• No corrosion at the turbine blades.
Economiser and Air Pre-heater
• They are such devices which recover the heat from the flue gases on their way to chimney and raise the temperature of feed water.
• Economiser raises boiler efficiency.• Air Pre-heaters recover the heat from the
flue gases leaving the economiser and heat the incoming air required for combustion
Condenser
• Which condenses the steam at the exhaust of turbine.
• It creates a very low pressure at the exhaust of turbine, this helps in converting heat energy of steam into mechanical energy in the prime mover.
• The condensed steam can be used as feed water to the boiler.
Prime Mover (i.e. Turbine)A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into mechanical energy.About 86% of all electric generation in the world is by use of steam turbines.It has almost completely replaced the reciprocating piston steam engine.
BOILER GENERATOR
STEAM TURBINE
Cooling Towers
• Remove heat from the water discharged from the condenser so that the water can be discharged to the river or re circulated and reused.
• Air can be circulated in the cooling towers through natural draft and mechanical draft.
Coal Handling Plant Details
• Source of coal = Piparwar Mines North Karanpur (Jharkhand)
• Location = Near Ranchi
• Distance = 1200 Kms.
• Type of coal = F-grade (Washed)• E grade (Raw)• Coal requirement = 13,000 MT/Day• ( 04 rakes )
Ash Handling Technique
• A natural result from the burning of fossil fuels, particularly coal, is the emission of flyash. Ash is mineral matter present in the fuel. For a pulverized coal unit, 60-80% of ash leaves with the flue gas.
• Two emission control devices for flyash are the fabric filters and electrostatic precipitators.
• Electrostatic precipitators have collection efficiency of 99%, but do not work well for flyash with a high electrical resistivity (as commonly results from combustion of low-sulfur coal). In addition, the designer must avoid allowing unburned gas to enter the electrostatic precipitator since the gas could be ignited.
Top View of ESP Schematic Diagram
• The fluegas laden with flyash is sent through pipes having negatively charged plates which give the particles a negative charge. The particles are then routed past positively charged plates, or grounded plates, which attract the now negatively-charged ash particles.
• The particles stick to the positive plates until they are collected. The air that leaves the plates is then clean from harmful pollutants.
Side view of ESP Schematic Diagram
Coal Ash can be used in:
• Construction of embankments and fills• Construction of road in sub-base• Manufacture of cement• Manufacture of bricks/blocks• Filling as flowable fill material• Agriculture as soil amendment/source of
essential plant nutrients
`
INPUTS FOR GAS STATION
• Fuel –Natural gas (Primary) HSD (Alternate fuel)• Source of gas- APM, PMT:ONGC/RIL/BRITISH GAS RLNG :GAIL, IOCL, GSPCL.
KG-D6 : RIL
TRANSPORTATION:From GAIL through HBJ Pipeline.
. Source of HSD : IOCL, HPCL, BPCL through Rly. rakes.
COMBINED CYCLE OPERATION(ONE MODULE)
WHRB
GT1
BP
DU
CT HPD
LPD
WHRB
GT2
BP
DU
CT HPD
LPD
ST1
CW
Gas Turbine Unit-1
Gas Turbine Unit-2
Steam Turbine Unit-1
HP LP
HP
ST
EA
M (
61 B
AR
, 530
°C)
LP STEAM (5 KSC, 210°C)
Condenser
CEPTo Dearator
SOLAR PLANTSOLAR PLANTTotal capacity 5 MW
The total project capital cost is put at Rs. 48.59 crore.Wipro limited has designed the project over 27 acres of land within the premises of existing NTPC Dadri plant.