. Factory and industrial management. ll steam jets helps to keep the bars cool and to increasethe draught. In a twelve-hour test, burning South Hetton unscreenedcoal (bean small) in a Galloway boiler with 47 square feet of gratesurface and 1,140 square feet of heating surface, the fuel burned perhour was 1,150 pounds, or 24^/^ pounds per hour per square foot ofgrate, giving an actual evaporation of pounds of water per poundof coal, equivalent to pounds from and at 212 degrees. The feedwater was at degrees, steam pressure pounds, averagedraught at induced fan inches of
. Factory and industrial management. ll steam jets helps to keep the bars cool and to increasethe draught. In a twelve-hour test, burning South Hetton unscreenedcoal (bean small) in a Galloway boiler with 47 square feet of gratesurface and 1,140 square feet of heating surface, the fuel burned perhour was 1,150 pounds, or 24^/^ pounds per hour per square foot ofgrate, giving an actual evaporation of pounds of water per poundof coal, equivalent to pounds from and at 212 degrees. The feedwater was at degrees, steam pressure pounds, averagedraught at induced fan inches of water. The gases left the boiler at868 degrees, and the economizer at 348 degrees. The fuel left cent, of forms ofsprinkler stokersare Hendersons,in which the coalis broken up as itcomes from thehopper, fallingonto fans whichspread it over thebars. This, to-gether with Dea-cons improve-ments, is nowcontrolled by theMechanical Stok-e r stokerspreads a thinlayer of fuel over proctors shovel 542 THE ENGINEERING MAGAZINE.
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