. Railway age gazette . them, allowing sufficientspace for two firenjen and a coal supply. Powdered Fuel for Railway Shops Strong Draft Unnecessary; The Economy of Pow-dered Fuel, Fuel Oil and Producer Gas Compared BY J. G. COUTANT The value of powdered coal as a fuel in the iron and steelindustry, as well as for steam boiler plants has long been known,but in spite of its many advantages and the apparent successof the systems of burning it, little progress has been madetoward its general adoption. Quoting from Bulletin 16 of theBureau of Mines: The use of powdered coal has passed beyond the ex
. Railway age gazette . them, allowing sufficientspace for two firenjen and a coal supply. Powdered Fuel for Railway Shops Strong Draft Unnecessary; The Economy of Pow-dered Fuel, Fuel Oil and Producer Gas Compared BY J. G. COUTANT The value of powdered coal as a fuel in the iron and steelindustry, as well as for steam boiler plants has long been known,but in spite of its many advantages and the apparent successof the systems of burning it, little progress has been madetoward its general adoption. Quoting from Bulletin 16 of theBureau of Mines: The use of powdered coal has passed beyond the experi-mental stage in Portland cement manufacture and in firingboilers in Europe and the United States. Manufacturers of im-proved forms of powder burners claim for a given type of coal,an increase of from 15 to 20 per cent in efficiency over com-mon grate firing, and these claims seem to be warranted. Some of the advantages obtained in burning powdered coalare: fl) Complete combustion, doing away with losses due to the. It is very desirable to purchase screenings or slacked coal onaccount of the advantage in price and to eliminate as muchcrushing as possible, although as a rule the percentage of ashincreases as the size of coal decreases. If it is found that thecoal contains too much ash or sulphur a great deal of thismay be removed by washing. The calorific value of the coalis practically unafifected, the water taken up by the coal beingremoved by thorough drainage and by the coal dryer. Coal containing as much over 30 per cent volatile matter asis possible is desirable; gas coal and lignites are to be following analysis is of a West Virginia coal, which hasgiven excellent results: B. t. u, per lb 14,000 Ash per cent. Fixed carbon per cent. Moisture per cent. Volatile matter per cent. Combustion.—To obtain great efficiency in powdered coalfiring, as in gas or oil firing, the combustion should take placein a chamber in contact with highly h
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
