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#BoilerManual #AirAndGasFlow #Section3 #Page40
Questions for Air and Gas Flow
1. When starting up a fan, what position should its inlet vane and discharge damper be in?
2. What are the purposes of secondary air, primary air and tertiary air?
3. Name the three types of heat transfer that occur in the boiler.
..........1. ____________________________________________
..........2. ____________________________________________
..........3. ____________________________________________
4. To exit the boiler, flue gas must take a sharp change in direction. What does this cause?
5. To calculate air flow, what three types of data are needed?
6. To keep secondary air flow constant while the gas temperature drops, would you increase or decrease the differential pressure?
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#BoilerManual #AirAndGasFlow #Section3 #Page40
Questions for Air and Gas Flow
1. When starting up a fan, what position should its inlet vane and discharge damper be in?
2. What are the purposes of secondary air, primary air and tertiary air?
3. Name the three types of heat transfer that occur in the boiler.
..........1. ____________________________________________
..........2. ____________________________________________
..........3. ____________________________________________
4. To exit the boiler, flue gas must take a sharp change in direction. What does this cause?
5. To calculate air flow, what three types of data are needed?
6. To keep secondary air flow constant while the gas temperature drops, would you increase or decrease the differential pressure?
------------------------------------------------- 40 ------------------------------------------------------ -
#BoilerManual #AirAndGasFlow #Section3 #Page40
Questions for Air and Gas Flow
1. When starting up a fan, what position should its inlet vane and discharge damper be in?
2. What are the purposes of secondary air, primary air and tertiary air?
3. Name the three types of heat transfer that occur in the boiler.
..........1. ____________________________________________
..........2. ____________________________________________
..........3. ____________________________________________
4. To exit the boiler, flue gas must take a sharp change in direction. What does this cause?
5. To calculate air flow, what three types of data are needed?
6. To keep secondary air flow constant while the gas temperature drops, would you increase or decrease the differential pressure?
------------------------------------------------- 40 ------------------------------------------------------ -
#BoilerManual #AirAndGasFlow #Section3 #Page40
Questions for Air and Gas Flow
1. When starting up a fan, what position should its inlet vane and discharge damper be in?
2. What are the purposes of secondary air, primary air and tertiary air?
3. Name the three types of heat transfer that occur in the boiler.
..........1. ____________________________________________
..........2. ____________________________________________
..........3. ____________________________________________
4. To exit the boiler, flue gas must take a sharp change in direction. What does this cause?
5. To calculate air flow, what three types of data are needed?
6. To keep secondary air flow constant while the gas temperature drops, would you increase or decrease the differential pressure?
------------------------------------------------- 40 ------------------------------------------------------ -
#BoilerManual #FluidCirculation #Section2 #Page40
Answers for fluid circulation
1. The answer is "B". When you heat water that is converting to steam, the heat produces more steam rather than raising the water temperature.
2. At 3206 psi, water and steam have the same densities. This is known as the critical pressure.
3. The answer to question three is False[/]. The need to match fluid flow and firing rate is [i]criticalat all load levels to avoid overheat conditions.
4. Before a UP boiler is fired, the flow in the furnace circuit must be at least 33% of the full load flow.
5. Internal corrosion can be minimized by controlling the pH of the feedwater and by limiting the amounts of oxygen and carbon dioxide in the feedwater.
6. The first fluid flow path is through the neck of the cyclone. Passes two through six are within the barrel of the cyclone. The seventh pass is through the re-entrant throat.
7. The two purposes are interrelated. First, the mix system keeps fluid temperatures within 80 F of the average temperature of a particular flow path.
8. The connecting tubing from the primary to the secondary superheater crisscrosses to prevent flue gas temperature imbalances from carrying over to the steam.
------------------------------------------------- 40 ------------------------------------------------------ -
#BoilerManual #FluidCirculation #Section2 #Page40
Answers for fluid circulation
1. The answer is "B". When you heat water that is converting to steam, the heat produces more steam rather than raising the water temperature.
2. At 3206 psi, water and steam have the same densities. This is known as the critical pressure.
3. The answer to question three is False[/]. The need to match fluid flow and firing rate is [i]criticalat all load levels to avoid overheat conditions.
4. Before a UP boiler is fired, the flow in the furnace circuit must be at least 33% of the full load flow.
5. Internal corrosion can be minimized by controlling the pH of the feedwater and by limiting the amounts of oxygen and carbon dioxide in the feedwater.
6. The first fluid flow path is through the neck of the cyclone. Passes two through six are within the barrel of the cyclone. The seventh pass is through the re-entrant throat.
7. The two purposes are interrelated. First, the mix system keeps fluid temperatures within 80 F of the average temperature of a particular flow path.
8. The connecting tubing from the primary to the secondary superheater crisscrosses to prevent flue gas temperature imbalances from carrying over to the steam.
------------------------------------------------- 40 ------------------------------------------------------ -
#BoilerManual #FluidCirculation #Section2 #Page40
Answers for fluid circulation
1. The answer is "B". When you heat water that is converting to steam, the heat produces more steam rather than raising the water temperature.
2. At 3206 psi, water and steam have the same densities. This is known as the critical pressure.
3. The answer to question three is False[/]. The need to match fluid flow and firing rate is [i]criticalat all load levels to avoid overheat conditions.
4. Before a UP boiler is fired, the flow in the furnace circuit must be at least 33% of the full load flow.
5. Internal corrosion can be minimized by controlling the pH of the feedwater and by limiting the amounts of oxygen and carbon dioxide in the feedwater.
6. The first fluid flow path is through the neck of the cyclone. Passes two through six are within the barrel of the cyclone. The seventh pass is through the re-entrant throat.
7. The two purposes are interrelated. First, the mix system keeps fluid temperatures within 80 F of the average temperature of a particular flow path.
8. The connecting tubing from the primary to the secondary superheater crisscrosses to prevent flue gas temperature imbalances from carrying over to the steam.
------------------------------------------------- 40 ------------------------------------------------------ -
#BoilerManual #FluidCirculation #Section2 #Page40
Answers for fluid circulation
1. The answer is "B". When you heat water that is converting to steam, the heat produces more steam rather than raising the water temperature.
2. At 3206 psi, water and steam have the same densities. This is known as the critical pressure.
3. The answer to question three is False[/]. The need to match fluid flow and firing rate is [i]criticalat all load levels to avoid overheat conditions.
4. Before a UP boiler is fired, the flow in the furnace circuit must be at least 33% of the full load flow.
5. Internal corrosion can be minimized by controlling the pH of the feedwater and by limiting the amounts of oxygen and carbon dioxide in the feedwater.
6. The first fluid flow path is through the neck of the cyclone. Passes two through six are within the barrel of the cyclone. The seventh pass is through the re-entrant throat.
7. The two purposes are interrelated. First, the mix system keeps fluid temperatures within 80 F of the average temperature of a particular flow path.
8. The connecting tubing from the primary to the secondary superheater crisscrosses to prevent flue gas temperature imbalances from carrying over to the steam.
------------------------------------------------- 40 ------------------------------------------------------