An underfeed stoker feeds coal to a boiler at the rate of 100 kg/hr. The ultimate analysis of coal is: C = 75.2 %, H;= 3.6 %, O; = 7.4 %, N2 = 1.2 %, S = 2.1 % and the remaining is Ash. The dry refuse taken from the ash pit shows 20 % C and 80 % ash by weight. Orsat analysis of the flue gases gives the following composition, CO, = 75.2 %, O2 = 7.9 %, CO= 1 % Determine: a) m³ of air supplied per minute if the pressure is 100 kPaa and 20 °C; b) Total volume of flue gases flowing through the stack per minute if the temperature is 60 °C and pressure is 100 kPaa.

An underfeed stoker feeds coal to a boiler at the rate of 100 kg/hr. The ultimate analysis of coal is: C = 75.2 %, H;= 3.6 %, O; = 7.4 %, N2 = 1.2 %, S = 2.1 % and the remaining is Ash. The dry refuse taken from the ash pit shows 20 % C and 80 % ash by weight. Orsat analysis of the flue gases gives the following composition, CO, = 75.2 %, O2 = 7.9 %, CO= 1 % Determine: a) m³ of air supplied per minute if the pressure is 100 kPaa and 20 °C; b) Total volume of flue gases flowing through the stack per minute if the temperature is 60 °C and pressure is 100 kPaa.

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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Question

An underfeed stoker feeds coal to a boiler at the rate of 100 kg/hr. The ultimate analysis of coal is: C =
75.2 %, H;= 3.6 %, O2 = 7.4 %, N2 = 1.2 %, S = 2.1 % and the remaining is Ash.
The dry refuse taken from the ash pit shows 20 % C and 80 % ash by weight. Orsat analysis of the flue
gases gives the following composition, CO2 = 75.2 %, O, = 7.9 %, CO= 1 %
Determine: a) m³ of air supplied per minute if the pressure is 100 kPaa and 20 °C; b) Total volume of
flue gases flowing through the stack per minute if the temperature is 60 °C and pressure is 100 kPaa.

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