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Usage of highly preheated secondary air in pulverized fuel firing helps in ______

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Usage of highly preheated secondary air in pulverized fuel firing helps in ______

(a) Heats fuel at pace

(b) Takes less time to finish the process

(c) Rapid flame propagation

(d) Reduces the troubles and problems caused in the system

The question was asked in exam.

Question is taken from Pulverised Fuel Burning in division Steam Power Plant of Energy Engineering

1 Answer

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Best answer
Correct answer is (c) Rapid flame propagation

Best explanation: Using highly preheated secondary air helps in raid flame propagation. This also increases the ability of system to use high combustion air temperature. The furnace makes it possible to complete combustion with minimum travel of flame travel since it is pre-heated.

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