FiNAL PPT

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