Question

The coal received at a boiler house has a higher heating value of 14300 BTU/lb and the following proximate analysis: 4.0 % moisture, 23 % VCM, 65 % fixed carbon, and 8 % ash and negligible sulfur and nitrogen. The refuse removed from the furnace contains on the average 8 % VCM, 34 % fixed carbon, and 58 % ash. Dry air enters at 25 oC. The barometer is 740 mm Hg. The stack gases leave the furnace at 450 oC,and an Orsat analysis of this gas shows 13.0 % CO2, 1.9 % CO, 0.8 % H2, 5.0 % O2 and 79.3 % N2. a. Using Calderwood equation estimate the % C in the coal Per 100 kg of coal feed in the boiler Calculate the following b. Unburned coal in the refuse c. Coked coal in the refuse d. kmol of dry stack gas

Answer 1