Question

In which form does the coal burned rapidly in cyclone burner drains down the inner wall of furnace?

(a) Powdered

(b) In form of small chips

(c) Metal slag

(d) Gaseous form

This question was posed to me in an online interview.

I'd like to ask this question from Fuel Burning Equipments in portion Steam Power Plant of Energy Engineering

Answer 1

Right option is (c) Metal slag

Explanation: The ash formed due to rapid burning of coal drains down the inner wall of the furnace as molten slag. Hot flue gases along with 10 to 20% of fly ash enter the furnace. Due to centrifugal action most of the fly ash is thrown against the furnace wall and is drained out along with molten slag.