what are difference between Water tube boiler & Fire tube boiler?

what are difference between Water tube boiler & Fire tube boiler?

what are difference between Water tube boiler & Fire tube boiler?

what are difference between Water tube boiler & Fire tube boiler?

Water Tube Boiler Fire Tube Boiler
1. The water flows inside the tube and the hot combustion gases flows outside the tube. 1. The hot gases flows inside the tube and the water is outside the tube.
2. These are generally high pressure boiler ranging up to 70-100 Bar. 2. These are generally low or medium pressure boiler up to 25 Bar.
3. Faster rate of steam Production. 3. Lower rate of steam Production.
4. More efficient 4. Less efficient
5. These boilers are mostly externally fired. 5. These are internally fired. The furnace is placed at one end of the Fire tube.
6. Suitable for large scale power plants. 6. Suitable for small scale power plants.
7. Since the operating pressure is high, the risk of explosion is also high. 7. Risk of explosion is less, as less operating pressure.
8. Occupies less floor space. 8. Occupies large floor space.
9. Because of complexity, skilled person is required to operate. 9. Less complex, less skill required.
10. Easy to clean as it is externally fired 10. Difficult to clean as internally fired.
11. The shell diameter is less. 11. The diameter of shell is more.
12. Easy to carry out maintenance. 12. Difficult to carry out maintenance
13. Since water flows inside the tube, treatment of water is necessary to prevent deposit formation. 13. Treatment of water is not necessary.
14. More environment friendly 14. Less environment friendly
15. Operating cost is high 15. Operating Cost is less.
16. Examples: Babcock and Wilcox Boiler, Stirling Boiler, La-mont Boiler, Benson Boiler, Loeffler Boiler, Yarrow Boiler 16. Examples: Simple Vertical Boiler, coachran boiler, Lancashire Boiler, Cornish Boiler, Scotch Boiler, Locomotive Boiler, Velcon Boiler.

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