Question

What happens due to the pressure in the pulverizer?

(a) Pulverized fuel is blown into boiler room

(b) Increases the rate of combustion

(c) Makes the process is vigorous

(d) The large particles in the pulverized fuels are removed out

I have been asked this question in exam.

This interesting question is from Pulverised Mills topic in division Steam Power Plant of Energy Engineering

Answer 1

Correct answer is (a) Pulverized fuel is blown into boiler room

For explanation: As the casing of the pulverizer is under pressure, the leakage of fine coal through the mill casing causes the pulverized fuel to be blown out into the boiler room. The fan used with this mill handles only air therefore the blades erosion by coal particle is eliminated.