Question

What is the advantage of using retractable soot blower?

(a) Has high blowing capacity compared to steam and wall blowers

(b) Protects from high temperatures when not in use

(c) Consumes less amount of electricity

(d) Produces less amount of noise

This question was posed to me during a job interview.

Question is taken from Soot Blowers topic in portion Steam Power Plant of Energy Engineering

Answer 1

Right choice is (b) Protects from high temperatures when not in use

Explanation: Retractable blower, though more expensive initially, have the advantage of protection from high temperature when not in use. Also, using only two travelling nozzles, the jet can be larger without excessive steam drain, and the projected blast distance is greater.