The Chemical Examination of Water, Fuel, Flue Gases and Lubricants; A Course for Engineering Students, Chemistry 16, as Given in the Division of Appli (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ...accession of fuel by some system of automatic stoking; and, second, the discharge of the volatile products into a highly heated combustion zone for accomplishing both the necessary admixture of air and the completion of the oxidation processes. Storage, Weathering, And Spontaneous Combustion Deterioration: --Coal is subject to deterioration from the time of breaking out at the mine until used. These losses, however, are relatively small. A sudden drop occurs in the first week or two, due no doubt to the liberation of certain of the hydrocarbons. Subsequent losses are more largely due to the absorption of oxygen and the formation of humic compounds which are part of the subsequent coal texture. The cut shown herewith is typical and illustrates the kind and amount of the losses over the space of one year's storage. Perhaps even more serious than the loss by weathering is the disintegration or slaking which takes place, whereby the coal is reduced in size. It is thus rendered more difficult to maintain a proper circulation of air through the fuel bed. The matter of weathering is discussed in detail in Bulletin No. 38 of the Illinois Engineering Experiment Station. Spontaneous Combustion: --All coals of the bituminous type are subject to spontaneous combustion. A detailed study of the causes has been made in Bulletin No. 46 of the Illinois Engineering Experiment Station. Briefly summarized, they are as follows: 1. The oxidation of coal is continuous over a wide range of time and conditions, and begins with the freshly-mined coal at ordinary temperatures. A number of oxidation processes are involved which are more or less distinct in character, some being relatively slow and moderate in form, while others are rapid and vigorous in their action..