File:Technical paper (1911) (14781267465).jpg

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Identifier: technicalpaper139unit (find matches)
Title: Technical paper
Year: 1911 (1910s)
Authors: United States. Bureau of Mines
Subjects: Mines and mineral resources Mines and mineral resources
Publisher: Washington Govt. Print. Off.
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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3456789 10DISTANCE FROM SURFACE OF GRATE, INCHES 11 12 FmuRE 7.—Composition of gases and temperature in 12-inch fuel bed of anthracite coal in a hand-firedexperimental furnace. Rates of combustion, 10,6, and 3 pounds of fuel per square foot of grate pec hour. per ccMit. As the gases flow through the upper layers of the fuel bedthe percentage of C02 drops and the percentage of CO increases rap-idly. This change indicates that as long as there is free oxygen thecarbon is oxidized to C02, but when the oxygen is used up, the COa 28 LOW-RATE COMBUSTION IN FUEL BEDS. acts as an oxidizing agent and is reduced to CO, which increasestwice as rapidly as C02 disappears. The zone of reduction of C02extends to near the surface of the fuel bed. Just within the top of
Text Appearing After Image:
o o a *i fi 7 ft 9 DISTANCE FROM SURFACE OF GRATE. INCHES Figtjre 8.—Composition of gases and temperature in 6-inch fuel bed of metallurgical coke in a hand-firedexperimental furnace. Rates of combustion, 10,6, and 3 pounds of fuel per square foot of grate per hour. the fuel bed the reduction of C02 is stopped by the presence of airwhich comes down along the sides of the furnace and penetrates theupper part of the bed. In the charts this infiltration of air from the RESULTS OF TESTS OF GROUP 1. 29 top of the furnace is indicated by the appearance of free oxygen inthe gases, the drop in CO content due to its combustion, and with thehigher rates of combustion the rise in C02 content. With the lower 1 1 —4 ^ etfjj to torfc) 130012001100 24 / l 900 s, / \ s v, / \ 16 > \ /■ -, ~ ^C V / \ \ i s \ 12 \ / / 1; ^> < s lt \ •■^ \ s /5 \ -J 8 * \ & «* / s 24 I -■rn •■■r Ui 1200 m C,20 V CO *

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Author United States. Bureau of Mines
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Flickr tags
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  • bookid:technicalpaper139unit
  • bookyear:1911
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:United_States__Bureau_of_Mines
  • booksubject:Mines_and_mineral_resources
  • bookpublisher:Washington_Govt__Print__Off_
  • bookcontributor:Gerstein___University_of_Toronto
  • booksponsor:University_of_Toronto
  • bookleafnumber:27
  • bookcollection:gerstein
  • bookcollection:toronto
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30 July 2014
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