β Scribed by W.W. Odell
No coin nor oath required. For personal study only.
U. S. BUREAU OF MINES.* WATER GAS TAR EMULSIONS. By W. W. Odell.
AL~IOST every gas plant where carbureted water gas is made experiences some difficulty in separating the tar from the water condensing from the gas. The fact that this trouble is ever present in some plants, and seldom present in others, indicates that certain operating variables have considerable to do with the formation of separable tar-water emulsions. The U. S. Bureau of Mines, in co6peration with the University of Illinois Engineering Experiment Station, the Illinois State Geological Survey, and the Illinois Gas Association, has investigated the causes for emulsion difficulties in water gas plants.
It was found that the tar differs in composition and quality according to the part of the cooling system from which the sample is collected, and that usually the tar which condenses from the gas in the early stages of cooling forms the most stable emulsions. Among the factors that affect the quality of the tar are the" temperature in the checker chamber, spacing and condititon of checkerbrick; rate of input, distribution, and character of the carbureting oil used, quantity of excess steam used, character of condensing system and rate of cooling the gas. Fuller details are given in a report that will be published by the Bureau of Mines.
MILLING METHODS IN TRI-STATE ZINC DISTRICT.
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