Publisher's Synopsis
Excerpt from Elimination of Oil From Exhaust Steam: A Thesis
The Elimination of Oil from Exhaust Steam.
Oil is eliminated from exhaust steam by oil separators, or as they are often called eliminators or grease extractors, before it passes to the condenser or heating system.
When live steam enters an engine it carries with it oil necessary to lubricate the engine. The quantity of oil entering an engine at each stroke or revolution is very small, though in the aggregate it is considerable and with some lubricator very great. It does its work, however, by maintaining the lubrication of the cylinder and piston, and shows its presence and diffusion within the steam by reaching all parts of the inside of the engine, and if it is not separated, manifests itself most decidedly in the boiler, when the feed water is taken from, a condenser or the returns of an exhaust steam heating system. This oil gathers in spots on the tubes or shell of the boiler, and prevents the rapid conduction of heat to the water. As a result the excessive heat, developed at these points, forms blisters by reducing the thickness of the metal and weakens the boiler. The oil in the exhaust steam which is used for a heating system, collects on the radiating pipes and reduces the heat transmission. After these surfaces have been sufficiently coated, the oil is carried back to the boiler in the condensed steam if used for feed water.
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