The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . eed-water is puipped into the chamber, and the excess accumu-lates with its temperature raised to the evaporation an extra supply of steam is required, the feed-pump isstopped and the boiler is fed with the hot water stored in thechamber. Besides the storage effect, it is found that many BOILER 149 of the impurities of the feed become deposited in the chamber,where they are comparatively harmless and from which they arereadily removable. Oil Separators.—When the steam from the engines is
The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . eed-water is puipped into the chamber, and the excess accumu-lates with its temperature raised to the evaporation an extra supply of steam is required, the feed-pump isstopped and the boiler is fed with the hot water stored in thechamber. Besides the storage effect, it is found that many BOILER 149 of the impurities of the feed become deposited in the chamber,where they are comparatively harmless and from which they arereadily removable. Oil Separators.—When the steam from the engines is con-densed and used as feed-water, as is the case with marine boilers,much difficulty is often experienced with the oil which passes metallic contact between the zinc and the boiler-plate. Thefunction of the zinc is to set up galvanic action; it plays thepart of the negative metal, and is dissolved while the metal ofthe shell is kept electro-positive. Care must always be takenthat the fragments which break o£E the zinc as it wastes awaycannot fall upon the heating surfaces of the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
