. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Front for Manhole.—Fi FURNACE DOORS. The chief points to be considered in the design of furnacedoors are to prevent the radiation of heat through them, andto provide for the admission of air above the burning fuel inorder to aid in the consumption of smoke and unburnt gases. In all cases where the doors are exposed to very rough usage—such, for instance, as in locomotive and marine boilers—themeans for admitting air must be of the simplest, and consistgenerally of small perfo
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Front for Manhole.—Fi FURNACE DOORS. The chief points to be considered in the design of furnacedoors are to prevent the radiation of heat through them, andto provide for the admission of air above the burning fuel inorder to aid in the consumption of smoke and unburnt gases. In all cases where the doors are exposed to very rough usage—such, for instance, as in locomotive and marine boilers—themeans for admitting air must be of the simplest, and consistgenerally of small perforations as shown m Fig. 76 which re- Maxims and Instructions, j6g FURNACE a front view, and section of the furnace door of aocomotire boiler. The heat from the burning fuel is prevented. Fig. 7«.Irom radiating through the perforation in the outer door, hyattaching to it a second or baffle plate, a, at a distance of aboutH inches, the holes in which do not coincide in direction withthe door proper. By the constant entry of cold air from theoutside the greater part of any heat which may be commu-nicated to the door by radiation or conduction is returned tothe furnace. Doors similar to the above provide for the constant additionof limited quantities of fresh air above the fuel, but in actualpractice, however, air is only needed above the fire for a fewminutes after fresh fuel has heen thrown on the grates andthen is required in considerable quantities. In the case ofland boilers, the furnace doors of which undergo comparativelymild treatment, it is possible to introduce the necessary com-plications to effect this object.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
