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What decides the efficiency of pulverized fuel firing system?

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What decides the efficiency of pulverized fuel firing system?

(a) Turbulence of air

(b) Size of coal powder

(c) Primary air

(d) Feeder

The question was asked in an internship interview.

My doubt stems from Pulverised Fuel Burning topic in division Steam Power Plant of Energy Engineering

1 Answer

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Best answer
Right choice is (b) Size of coal powder

Explanation: The size coal powder decides the efficiency of the pulverized fuel firing system. The fineness of the coal should be such as 70%. Of it would pass through a 200 mesh sieve and 90% through 50 mesh sieve.

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