| OCR Text |
Show The use of oil. in preventing boiler scale now so prevalent is met with the objection that in using other than standard stand-ard oil of 150 to 800 degrees fire tea there is danger of the formation of what is called oil scale. This, according to chemical authority, is owing to the fact that when the higher fire "test oils are introduced they rise and float upon the toD of the water, and the latter, impreg nated with sediment and mud, boils and bubbles up through the oil scum on top, and on the water becoming vaporized vapor-ized it liberates the particles of mud and scale contained, which fall back upon rnis layer oi on upon tne top or the water. After awhile the layer of oil becomes so impregnated with mineral substances that it sinks to the bottom of the boiler, forming an incrustation, or oil scale,- which is as 141111000 to the boiler as is the lime or magnesium scale. But the same objection, it is remarked, re-marked, has also been made to crude petroleum. New York Sun. |
