1. SEMINAR ON BOILERS BOILERS

2. WHAT IS A BOILER? Boiler is an apparatus to produce steam.Thermal released by combustion of fuel is transferred to water which vaporizes and gets converted into steam at a desired pressure and temperature.

3. BOILERS IN INDUSTRIES

4. BOILERS IN STEAM PLANTS

5. FEATURES OF A BOILER 1. SAFETY 2. ACCESSIBILITY 3. CAPACITY 4. EFFICIENCY 5. COST 6. CONSTRUCTION

6. TYPES OF BOILERS ACCORDING TO FLOW OF WATER AND HOT GASES FLOW OF WATER AND HOT GASES POSITION OF FURNACE POSITION OF FURNACE POSITION OF PRINCIPAL AXIS POSITION OF PRINCIPAL AXIS APPLICATION APPLICATION CIRCULATING WATER CIRCULATING WATER STEAM PRESSURE STEAM PRESSURE

7. FLOW OF WATER AND HOT GASES 1.WATER TUBE BOILER Water circulates through tubes. Hot products of combustion flow over these tubes. Water circulates through tubes. Hot products of combustion flow over these tubes. 2.FIRE TUBE BOILER Hot combustion gases flow through the tubes. Water surrounds the tubes. Hot combustion gases flow through the tubes. Water surrounds the tubes.

8. WATER TUBE BOILER

9. FIRE TUBE BOILER

10. BABCOCK AND WILCOX BOILER It’s a water tube boiler. It consists of a drum, super heater,headers, tubes etc. It’s a water tube boiler. It consists of a drum, super heater,headers, tubes etc.

11. COCHRAN BOILER It’s a fire tube boiler. Its a vertical boiler, has a lesser space. Flue gases escape to atmosphere after passing through smoke box and stack. It’s a fire tube boiler. Its a vertical boiler, has a lesser space. Flue gases escape to atmosphere after passing through smoke box and stack.

12. COCHRAN BOILER

13. POSITION OF FURNACE INTERNALLY FIRED INTERNALLY FIRED EXTERNALLY FIRED EXTERNALLY FIRED Internally fired boilers the grate combustion the grate combustion chamber are enclosed within boiler shell. Internally fired boilers the grate combustion the grate combustion chamber are enclosed within boiler shell.

14. POSITION OF PRINCIPAL AXIS VERTICAL VERTICAL HORIZONTAL HORIZONTAL INCLINED INCLINED

15. APPLICATION STATIONARY STATIONARY MOBILE(MARINE,LOCOMOTIVE) MOBILE(MARINE,LOCOMOTIVE)

16. SCOTCH MARINE BOILER It’s a fire tube boiler. It is of 2 types: 1.Single ended 2.Double ended

17. CIRCULATION OF WATER Natural circulation Natural circulation Forced circulation Forced circulation

18. STEAM PRESSURE Low pressure Low pressure Medium pressure Medium pressure High pressure High pressure

19. HIGH PRESSURE BOILER Boiler pressure is 250 kg per sq. Cm And steam temperature is 550 degree centigrade. It is a water tube boiler.

20. BOILER MOUNTINGS AND ACCESSORIES Mountings are the components used for the safety of the boiler. Ex-feed pump, speed check valve etc.

21. FEED PUMP VALVES

22. THERMAL EFFICIENCY OF BOILER It is defined as the ratio of heat actually utilized be water in generation of steam to the heat supplied during the combustion of fuel. Efficiency=W(H2-H1)/W1*CV Efficiency=W(H2-H1)/W1*CV

23. BOILER MAINTENANCE Regular maintenance and careful supervision of working of various components result in efficient operation

24. THANK YOU FOR PATIENT HEARING