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Which type of coal is used in the under feed system?(a) Anthracite coal(b) Bituminous coal(c) Briquette coal(d) Pulverized coalI got this question in an online interview.My question is from Principle of Stoker topic in division Steam Power Plant of Energy Engineering

Answer»

The correct option is (b) Bituminous COAL

The best explanation: The under feed method uses bituminous coals which have high VOLATILE matter. The volatile matter gets heated to a high temperature as it passes through incandescent REGION of coal. The volatile matter being at a high temperature before ENTERING the furnace burns quickly when MIXED with secondary air.



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