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O BTU/lb. This coal also efuse is 4%, and the fixe ated with water vapor. Th

O BTU/lb. This coal also efuse is 4%, and the fixe ated with water vapor. Th

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Answer the first three subparts.

A boiler furnace's stack gas includes 10.8 % CO2, % CO, 9.0 % 02, and 80.0 % N2. These gases enter the stack at 760°F, at a draft of 0.5 in. of H20. The coal burned in the furnace has 1.44 % moisture, 34.61 % volatile matter, 57.77 % fixed carbon, and 6.18 % ash. The coal has a heating value of 14,350 BTU/lb. This coal also contains 0.78 % sulfur and % nitrogen. The volatile matter in dry refuse is 4%, and the fixed carbon is 21%. The air in the boiler room is 74°F and 65 % saturated with water vapor. The barometer reads 29.7 in. Hg. (Note: use Tref = 250C) Compute for the following: a. %heat loss due to unburnt combustibles in the refuse b. %heat loss due to potential heat losses c. % of the heating value required to vaporize the total water vapor formed on combustion d. %heat loss as sensible heat e. Amount of heat available for steam production, assuming no other heat losses thru radiation, etc.
Transcribed Image Text:A boiler furnace's stack gas includes 10.8 % CO2, % CO, 9.0 % 02, and 80.0 % N2. These gases enter the stack at 760°F, at a draft of 0.5 in. of H20. The coal burned in the furnace has 1.44 % moisture, 34.61 % volatile matter, 57.77 % fixed carbon, and 6.18 % ash. The coal has a heating value of 14,350 BTU/lb. This coal also contains 0.78 % sulfur and % nitrogen. The volatile matter in dry refuse is 4%, and the fixed carbon is 21%. The air in the boiler room is 74°F and 65 % saturated with water vapor. The barometer reads 29.7 in. Hg. (Note: use Tref = 250C) Compute for the following: a. %heat loss due to unburnt combustibles in the refuse b. %heat loss due to potential heat losses c. % of the heating value required to vaporize the total water vapor formed on combustion d. %heat loss as sensible heat e. Amount of heat available for steam production, assuming no other heat losses thru radiation, etc.
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