Speed of operation of smoke tube boilers - Basic Mechanical Engineering

Q.  Smoke tube boilers have large water to steam ratio, hence _____
- Published on 01 Sep 15

a. have high evaporation rates
b. are slow in operations
c. temperature stresses inducing failure of feed water arrangement are maximum
d. all of the above

ANSWER: are slow in operations

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    Discussion

  • Sravanthi    -Posted on 12 Nov 15
    Smoke tube boilers

    - In smoke tube boilers, hot flue gases flowing through the tubes are surrounded by water on the outer surface.

    - These boilers have low evaporation rates because they have large water to steam ratio. Due to high ratio of water and steam, the temperature stresses which cause failure of feed water arrangement are minimum.

    - These boilers are slow in operations. They work upto 20 bar pressure as they have large drum diameter and have limitations in thickness and stress considerations of boiler shell.

    - Smoke tube boilers are not suitable for large power houses as these are made of smaller sizes and has surface design rigid

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