Watertube Boilers Flashcards
1
Q
Where does combustion take place?
A
In the furnace
2
Q
The steam and water mixture ____ the water tube walls
A
rise up
3
Q
The furnace is surrounded by what?
A
Water wall tubes
4
Q
Why does natural circulation occur?
A
because the downcomer water is heavier than the steam-water mixture in the riser
5
Q
Why is it essential good circulation is maintained through all the tubes?
A
To conduct heat away from the tube walls, and thereby keep tube metal temperature within safe limits
6
Q
At full load what percentage of water is in circulation?
A
70%
7
Q
Name 3 components mounted inside the steam drum
A
ryer, feedwater distribution header & steam/water separators
8
Q
Name 5 components mounted on the steam drum
A
Safety valves, air vents, continuous blowdown, gauge glass, outgoing steam connections
