Blowdown Tanks for Boilers
Blowdown tanks are used as an alternative system for cooling
the bottom boiler blowdown. These large tanks retain the blowdown
water volume from one blow after the flash steam has been vented
to the atmosphere and allow the water to cool down by natural
convection over 6-12 hour period. The cooled water will be
below 140° Farhrenheit when it is displaced by the next blowdown
and forced out of the overflow drainpipe.
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These heavy steel tanks receive the bottom blowdown water
from a boiler and cool it down using the flash steam principle,
along with convection cooling over several hours for the retained
hot water. The tank is designed to breakup the blowdown flow
by impacting the high pressure hot water on the steel centrifugal
impact plate. The water droplets give up heat as flash steam
is formed. The flash steam is vented from the top of the tank
to the atmosphere. Retained water displaces cooled water from
the previous blowdown, and is retained in the tank until it
cools to the statute limts.
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| Part Number |
Description Diameter X Shell length X OAH, vent, drain |
| BD3600 |
36" X 30" X 70", 4", 3" |
| BD4200 |
42" X 42" X 85", 5", 3" |
| BD4800 |
48" X 48" X 94", 6", 4" |
| BD5400 |
54" X 66" X 116", 6", 4" |
| BD6000 |
60" X 72" X 125", 6", 4" |
| BD7200 |
72" X 96" X 155", 10", 4" |
