. Railway age gazette . mperatures high enoughto drive off the volatile gases. Whether this is correct or not,the main points to bear in mind are: Avoid- the accumulation ofpowdered coal on rafters and floors where it may be blown aboutby a draft; provide sufficient ventilation; and avoid a confinedplace in which the coal dust may become well mixed with air. Comparison of Pozcdcred Coal, Fuel Oil and Producer Gas.—Powdered fuel offers considerable economy over oil or gas heat obtained is also more intense than that which can beobtained from solid coal, oil or producer gas. if care i
. Railway age gazette . mperatures high enoughto drive off the volatile gases. Whether this is correct or not,the main points to bear in mind are: Avoid- the accumulation ofpowdered coal on rafters and floors where it may be blown aboutby a draft; provide sufficient ventilation; and avoid a confinedplace in which the coal dust may become well mixed with air. Comparison of Pozcdcred Coal, Fuel Oil and Producer Gas.—Powdered fuel offers considerable economy over oil or gas heat obtained is also more intense than that which can beobtained from solid coal, oil or producer gas. if care is taken topreheat the air required for combustion. One barrel of oil con-tains 42 gal. and weighs from 310 lb. to 332 lb., according to thespecific gravity. One cubic foot of pulverized coal weighs, loose38 lb., packed 46 lb. Assuming that 1 gal. of fuel oil contains 140,000 B. t. u. and1 lb. of pulverized coal contains 14,000 B. t. u., the heat value of1 gal. of oil equals that of 10 lb. of pulverized coal. These are. Spring Relief Coal Crusher Made by the Link Belt Company good figures to remember for comparison. The following tablegives comparative figures for oil and different grades of coal: B. t. u. per lb. of Lb of pulverized coal Bbls. of oil to one short pulverized coal. to 1 bbl. of oil. ton of pulverized coal. 10,000 588 11,000 534 12,000 480 13,000 452 14,000 420 15,000 392 In estimating the economy of pulverized coal, 35 to 50 centsa ton should be added to cover the cost of milling, as well as thefixed charges on the plant. There will be no other extra chargeas the coal is as easy to handle as oil or gas. Powdered coal has the further advantage over gas of doingaway with the gas producers inherent losses. These are con- siderable, for it is seldom that the thermal loss in the gasificationof fuel by premature combustion, due to heat radiation and con-vection, is under 20 per cent of the available B. t. u.; to thisshould be added the l
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
