File:The Street railway journal (1905) (14574504690).jpg

Identifier: streetrailwayjo261905newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
pted to the use of eitherbituminous or anthracite coal, and has a capacity of 1500-hpwhen working at full load. A general plan of the instal-lation is shown herewith. The plant is guaranteed to gasify1890 lbs. of Pocahontas or similar coal per hour, and will havean efficiency in gas produced of 70 per cent of the heat valueof the coal, supplying gas at the valve of a 24-in. delivery maincontaining not over .01 gram of tar and not over .1 gram ofdust per cubic meter at 62 degs. F. and atmospheric pressure.There are 5 water seal producers, 9 ft. in dia., each with hand-feed hoppers and water-cooled top plates, five No. 8 economiz-ers and five coke scrubbers. The scrubbers are each 8 ft. india. and 25 ft. high. There are two sawdust purifiers, 10 ft. x10 ft., a 60-hp boiler, two blowers, a lifting trolley for the puri-fier covers, a 15,000 cu. ft. gas holder in a steel tank, and twotar extractors, and a 40-hp engine with fittings. In the pressure type of gas producer the air required for
Text Appearing After Image:
PLAN OF MEDFORD PLANT gas generation is delivered to the producer under pressure, asis also the generated gas to the engine. Although such a plantoccupies more space than the suction type, it has far greaterelasticity in meeting variations in quality of fuel and in theability to utilize different kinds and cheaper grades of fuel.After the hot gases leave the producer they are cooled by anair blast; then the gas is forced through a wash-box, where theextraneous matter is largely deposited. At this point is thewater seal against the gases stored in the holder and presentin the rest of the apparatus. The gas then enters the scrubbers,whose compartments are filled with coke and showered withwater sprays, and the removal of sulphur, ammonia and thebulk of the tar is finally completed in the purifier, the last ele-ment of the plant before reaching the holder. Besides storinga sufficient supply of gas for starting and for a few minutesoperation, the holder serves as a regulator of pressure,

Note About Images