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Which is the zone where the water vapors carried in air reacts with carbon in over-feed system?

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in Energy Engineering by (91.0k points)
Which is the zone where the water vapors carried in air reacts with carbon in over-feed system?

(a) Green coal bed zone

(b) Incandescent zone

(c) Combustion zone

(d) At the ash pit

I have been asked this question during a job interview.

Origin of the question is Principle of Stoker topic in section Steam Power Plant of Energy Engineering

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The correct option is (b) Incandescent zone

For explanation I would say: The water vapor carried with air reacts with Carbon in incandescent zone and forms CO, CO2, and H2. Part of CO2 formed reacts with air C passing through incandescent zone and converts into CO. The gases leaving the incandescent region of fuel bed consist of N2, CO2, CO, H2 and H2O.

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