. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Maxims and Instruchons. 57 THE GROWTH OF THE STEAM BOILER. creasing the diameter of the shell. Low furnaces are extremelyunfavorable to complete combustion, the comparatively coldcrown plates, when they are in contact with the water of theboiler, extinguishing the flames from the fuel, when they arejust formed, while the narrow space between the fiiel and thecrown does not admit the proper quantity of air being suppliedabove the fuel to complete the combustion of the gases, a
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Maxims and Instruchons. 57 THE GROWTH OF THE STEAM BOILER. creasing the diameter of the shell. Low furnaces are extremelyunfavorable to complete combustion, the comparatively coldcrown plates, when they are in contact with the water of theboiler, extinguishing the flames from the fuel, when they arejust formed, while the narrow space between the fiiel and thecrown does not admit the proper quantity of air being suppliedabove the fuel to complete the combustion of the gases, asthey arise. On the other hand, though this boiler favors the formationof the smoke, it supplies the means of completing the com-bustion afterwards, as before ex-plained, by means of the hot airfrom the second furnace. Another disadvantage is thedanger of collapsing the internalflue already spoken of; this isremedied by the introduction ofwhat are called the galloway tubes,illustrated in the cut shown onthis page, which is a cross sectionof the water tubes shown in and These tubes not only contribute to strengthen the flues butthey add to the heating surface and greatly promote the circu-lation so important in the water space. KOTB. These descriptions and illustrations of the Lancashire boilerare of general value, owing to the fact that very many exhaust-ive tests and experiments upon steam economy have beenmade and permanently recorded in connection with this formof steam generator. 5S Maxims and InstrucHona THE GROWTH OF THE STEAM BOILER. In the Galloway form of boiler tbe flue is sustained by the introduction of numerous conical tubes,flanged at the two ends and riveted across the flue. Thesetubes, a sketch of which are given in fig. 18 (rt), are in freecommunication with the water of the boiler, and besides actingas stifleners, they also serve to increase the heating surface andto promote eirculation ^
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
