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How is the fuel selected in the pulverized fuel system?

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How is the fuel selected in the pulverized fuel system?

(a) Depending on its size

(b) Depending on its grade

(c) Depending on volatile matter content

(d) Depending the chemical composition

This question was posed to me during an interview for a job.

My query is from Pulverised Fuel Handling topic in portion Steam Power Plant of Energy Engineering

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Best answer
Right option is (c) Depending on volatile matter content

Best explanation: In pulverized fuel firing system, coal with 20% volatile matter is considered as the best fuel for the plant, as high volatile coals are harder to grind when compared to low volatile coals. In stoker firing, the characteristics of the coal plays very important role in selection of coal.

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