. Railway age gazette . ed 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
. Railway age gazette . ed 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 heated material, fire bricksbeing the best. A comparatively cool surface will cause a chillingof the fuel and air immediately in contact with it below theignition point, resulting in incomplete combustion. The combus-tion takes place practically in two stages. The coal as it emergesfrom the burner is coked, the volatile matter being liber. Pulverized Coal Plant of the Lima Locomotive Corporation carbon contained in the ash and in the escaping volatile matter. (2) Total absence of smoke. (3) A cheaper grade of coal may be used. (4) The plant may be rapidly forced above its rated capacityand sudden demands for power readily met. (5) The labor of firing is practically eliminated. (6) There is practically no ash to be handled. (7) It is well adapted to the obtaining of high —Elaborate analyses and specifications as to the size and grade of bituminous coal and lignite to be used are essential requirement of the purchaser may be fulfilledby conforming specifications to the following characteristics:The coal used should contain nqt less than 30 per cent volatilematter, not more than 12 per cent ash, and not more than cent, sulphur ated and burned at once, while the solid coke is broughtto a bright red before it ignites. During these successive oper-ations th
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
