Engineering · Steam — Boilers
Continuous (surface) blowdown on a boiler is used to:
- AAdd feedwater
- BControl the concentration of dissolved solids in the boiler water✓ Correct
- CIncrease steam temperature
- DRemove air from the steam drum
Explanation
Surface blowdown bleeds off a small continuous flow from near the water surface where dissolved solids concentrate, holding total dissolved solids within limits to prevent scale, foaming, and carryover.
Authority: Steam Plants (USCG engineering topic)
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