. Electric railway journal . scale or have made trial applications. Dead Gas Pockets for ProtectingSoot-Cleaner Elements ]N CONNECTION with its research and developmentwork the engineers of the Vulcan Soot Cleaner Company,Du Bois, Pa., has furnished information regarding theprotection of soot-cleaner elements by means of so-called dead gas pockets. In order fully to protect the soot-cleaner elements insteep-tube boilers, they place a patented deflecting bafiletile, or row of firebrick forming a pocket in which the ele-ment is operated, at the bottom of the first pass, as shownin an accompanyin
. Electric railway journal . scale or have made trial applications. Dead Gas Pockets for ProtectingSoot-Cleaner Elements ]N CONNECTION with its research and developmentwork the engineers of the Vulcan Soot Cleaner Company,Du Bois, Pa., has furnished information regarding theprotection of soot-cleaner elements by means of so-called dead gas pockets. In order fully to protect the soot-cleaner elements insteep-tube boilers, they place a patented deflecting bafiletile, or row of firebrick forming a pocket in which the ele-ment is operated, at the bottom of the first pass, as shownin an accompanying illustration. This pocket eliminatesthe direct scrubbing action of the hot gases. Space isallowed at the bottom of this baffle through which soot andash will drop during the cleaning process. At the top ofthe first pass is another dead gas pocket, also patented, inwhich the second soot-cleaner element is located. Thissecond element rests upon the circulating tubfe to thefront drum. Contact with the comparatively cool tubes. PROTECTION FOR SOOT-CLEANER IN STEEP-TUBE BOILER assists greatly in maintaining the element at a safetemperature. By arching the baffle tile over the circulating tubes asshown, the hot gases, in their natural flow do not comeinto direct contact with the element. In boilers of this type where tubes are arranged in squares,perpendicular nozzles are used. The nozzle mates a rightangle with the axis of the element, hence the jet is directedbetween the tubes and clteans the entire bank of tubes. 936 Electric Eailway Journal Vol. 54, No. 20
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