PPE UNIT-I Notes
POWER PLANT ENGINEERING UNIT -I
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UNIT-I ==> Dust Collectors
SMOKE AND DUST REMOVAL In coal fed furnaces the products of combustion contain particles of solid matter floating in suspension. This may be smoke or dust. The production of smoke indicates that combustion conditions are faulty and amount of smoke produced can be reduced by improving the furnace design. Dust particles are mainly ash particles called fly ash intermixed with some quantity of carbon ash material called cinders. Gas borne particles larger than 1μ in diameter are called dust and when such particles become greater in size than 100p they are called cinders. Smoke is produced due to the incomplete combustion of fuels, smoke particles are less than 10p in size. The disposal smoke to the atmosphere is not desirable due to the following reasons: 1. A smoky atmosphere i...
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