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5-3. A lignite coal has the following ultimate analysis on the...
A bituminous coal is burned with air in a boiler furnace. The coal is fed at a rate of 40000 kg/h and has an ultimate analysis of 76wt% C, 5wt% H, 8wt% O, negligible amounts of N and S, and 11wt% non-...
A bituminous coal is burned with air in a boiler furnace. The
coal is fed at a rate of 40000 kg/h and has an ultimate analysis of
76wt% C, 5wt% H, 8wt% O, negligible amounts of N and S, and 11wt%
non-combustible ash. Air enters a preheater at 30 °C and 1 atm with
a relative humidity of 30%, exchanges heat with the hot flue gas
leaving the furnace and air enters the furnace at temperature Ta
(°C). The flue...
QUESTION 3 (25 MARKS In a power plant boiler, coal which has an ultimate analysis by...
QUESTION 3 (25 MARKS In a power plant boiler, coal which has an ultimate analysis by mass of 39.25 percent C, 6.93 percent H2, 41.11 percent 02, 0.72 percent N2, 0.79 percent S, and 11.20 percent Ash (non-combustibles) is burned steadily with 40% excess air. Assuming the combustion process as complete and treating the air as dry air, determine: (a) The balanced combustion equation for the combustion process. [6 Marks] (6) The Air-Fuel ratio [6 Marks) (c) The heat transfer...
A bituminous coal is burned with air in a boiler furnace. The
coal is fed at a rate of 40000 kg/h and has an ultimate analysis of
76wt% C, 5wt% H, 8wt% O, negligible amounts of N and S, and 11wt%
non-combustible ash. Air enters a preheater at 30 °C and 1 atm with
a relative humidity of 30%, exchanges heat with the hot flue gas
leaving the furnace and air enters the furnace at temperature Ta
(°C). The flue...
QUESTION 3 (25 MARKS In a power plant boiler, coal which has an ultimate analysis by mass of 39.25 percent C, 6.93 percent H2, 41.11 percent 02, 0.72 percent N2, 0.79 percent S, and 11.20 percent Ash (non-combustibles) is burned steadily with 40% excess air. Assuming the combustion process as complete and treating the air as dry air, determine: (a) The balanced combustion equation for the combustion process. [6 Marks] (6) The Air-Fuel ratio [6 Marks) (c) The heat transfer...
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