Transcript
AAPRESENTATIONPRESENTATION
ONON
Seminar Topic: Boiler & Its AuxiliariesSeminar Topic: Boiler & Its Auxiliaries
Presented By -
1. Vishal K. Dhanjode
2. Rohit H. Gadbail
3. T. Kenneth Singh
4. Vipul G. Dabre
5. Gaurav D. Wailekar
6. Balaji P. Malkhede
7. Snehal R. Wasnik
8. Nikhil Bharadwaj
9. Kundan Choudhary
Koradi Thermal Power Station – At a Glance
THE TWO STAGES IN KTPS:-
Stage 1:
Unit1-115 MW
Unit 2-115 MW
Unit 3-115 MW
Unit 4-115 MW
Stage 2:
Unit 5-200MW
Unit 6-210MW
Unit7-210MW
K.T.P.S. Unit Details
Unit No.
Inst.Capacity in MW
De-aeratedCapacity
Date of Commissioning
Make
Boiler T.G.
1 2 3 4 5 6 7
120
120
120
120
200
210
210
115
115
115
115
200
210
210
03.06.1974
24.03.1975
03.03.1976
22.07.1976
15.07.1978
30.03.1982
13.01.1983
ABL
ABL
ABL
ABL
CE Through
BHEL--do—--do--
Zamech
Zamech
Zamech
Zamech
Russian
Russian
Russian
Boiler & Its AuxiliariesBoiler & Its Auxiliaries
1. Principles of steam generation.2. Boiler drum.3. Water wall tubes.4. Super heaters.5. Re-Heaters.6. Economizers.7. Electro-static precipitators.8. Coal mill (bowl type).9. Air pre heaters.10. ID fan.11. FD fan.12. Chimney.13. PA fan.14. Wind box.15. Soot blowers.16. Scanner Fan
PRINCIPLES OF STEAM GENERATION.
5
6
7
8
3
4
BOILER CYCLE ANALYSIS
2
1
T
S
CRITICAL POINT
Vapour
9
SATURATED VAPOUR CURRESATURATED
LIQUID CURRE
LIOUID + VAPOUR
LIQUID
1 – 2 BOILER FEED PUMP WORK
2 – 3 SENSIBLE HEAT ADDITION (ECONOMISER)
3 – 4 LATENT HEAT ADDITION (Water Walls)
4 – 5 SUPER HEAT ADDITION (SUPER HEATERS)
5 – 6 EXPANSION (HP TURBINE WORK)
6 - 7 RE- HEATIING (RE-HEATER)
7 – 8 EXPANSION (IP TURBINE WORK)
8 - 9 EXPANSION (LP TURBINE WORK)
9 - 1 CONDENSATION (Water Cooled Condenser)
BOILER CYCLE ANALYSISBOILER CYCLE ANALYSIS
BOILER DRUM AND DRUM INTERNALS
Tangential Firing System
Air Heaters
Induced Draft Fans
Maintaining a good flame in a boiler is the key to a good boiler performance, this is main function of the Scanner.
Unstable flame is always a threat for boiler furnace explosion, which can
lead to a large outage of the boiler and economic loss.
FUNCTION OF SCANNER
Scanner Fan
These fans, two per boiler (100% capacity), supply requisite air for
scanner cooling.
A Soot Blower is a system for removing the Soot that is deposited on
the furnace tubes of a Boiler during combustion.
Types of soot blower:1. Wall Blower.2. Long Retractable Soot Blower (LRSB)3. Air Heater Blower.
Steam Blowing Medium :
Superheated steam is tapped from super heater for the purpose of soot blowing since capital cost of steam
pressure reducing equipment and drain is less than the cost of compressor, motors and controls of air system.
1. Steam2. Air
Reduced efficiency
Soot deposited on the heating surfaces of a boiler acts as a heat insulator. The result is that less heat is transferred to the water to raise steam and more heat is wasted up the chimney. This leads to
higher fuel consumption and/or poor steaming.
OPERATION
A soot blower may be operated manually or by a remotely controlled motor. The
soot, which is removed from the heating surfaces, will be blown out with the Flue
Gases. If the boiler is equipped with a dust collector, it will trap the soot.
Otherwise, the soot will be ejected into the outside air through the chimney stack.
What is draft
The term draft denotes the difference between the atmospheric pressure and the pressure existing in the furnace.
DRAFT SYSTEM
Need of Draft System
BoilerCombustion Air
Flue Gases
• Air needed for combustion
• Flue Gas needs to be evacuated
• Losses due to flow need to be overcome
Types of drafts
Natural draft
Induced draft
Forced draft
Balanced draft
ESP
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