. The street railway review . ire clay orother suitable material. This casing extends about three-fifths of the distance around the boiler, or to the water line,and is placed about two inches from the boiler. The entirefurnace is lined with fire-brick. The casing, consisting ofsingle fire-clay rings, and joined together hermetically, is made to conform to tiie circle of the boiler, each end of therings bp/ng provided with a flange which rests in the sidewall, and is supported by arches as shown in Fig. I. The center of the furnace, or bridge wall, is one-third thelength of the boiler, and is d
. The street railway review . ire clay orother suitable material. This casing extends about three-fifths of the distance around the boiler, or to the water line,and is placed about two inches from the boiler. The entirefurnace is lined with fire-brick. The casing, consisting ofsingle fire-clay rings, and joined together hermetically, is made to conform to tiie circle of the boiler, each end of therings bp/ng provided with a flange which rests in the sidewall, and is supported by arches as shown in Fig. I. The center of the furnace, or bridge wall, is one-third thelength of the boiler, and is divided into four spaces, orthroats. The expansion chamber is fitted with a deflectingplate at the end of the boiler. It will be seen that the fur-nace consists of three compartments, viz.; the combustionchamber, throats or bridge, and expansion chamber. This furnace is devised for the use of powdered coal whichis pulverized and fed into the furnace as required. The feedcan be adjusted by suitable valves in the pulverizing ap-. paratus, at will of the operator or fireman. This coal entersat the front of the furnace, or combustion chamber, througha specially devised spreader, together with the air requiredfof combustion. Upon entering the furnace, the coal dustignites at once and complete combustion rapidly ensues. The gases enter the expansion chamber at the rear of thesetting and thence are carried through the tubes to the ash resulting from the burning of the dust strikes adeflecting plate in the expansion chamber and is throwninto the lower part of the chamber where it remains untilremoved. Fig. 2 shows a battery of boilers equipped with the Peck& Patterson apparatus. There is an air main carried over thefront ends, with pipes to each furnace; a blower furnishesair under sufficient pressure to carry the coal dust into thefurnace. The coal crusher is located convenient to the sup-ply and the powdered coal is carried along an open troughin front of the boilers by a sc
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
