Blowdown vessel water inlet distinctions - Clarification needed
Blowdown vessel water inlet distinctions - Clarification needed
(OP)
Hello,
Currently I'm scoping a new blowdown vessel for our facilities boilers. I am reading up on Blowoff designs, and including the existing one we have on site, there are 2 distinct inlets: one for Continuous blowdown and one for intermittent blowdown.
While the designs specify this, and companies that build these vessels make a conscious effort to separate them I cant find specifically why. I am on board with this design logically,but I know that the piping designers will want to consolidate the CBD and IBD lines to a single run of pipe to save on costs.
I want to avoid that from happening if at all possible, but I have yet to find any ASME codes or otherwise in CSA to justify it yet. Is there any other resources I can reference?
Currently I'm scoping a new blowdown vessel for our facilities boilers. I am reading up on Blowoff designs, and including the existing one we have on site, there are 2 distinct inlets: one for Continuous blowdown and one for intermittent blowdown.
While the designs specify this, and companies that build these vessels make a conscious effort to separate them I cant find specifically why. I am on board with this design logically,but I know that the piping designers will want to consolidate the CBD and IBD lines to a single run of pipe to save on costs.
I want to avoid that from happening if at all possible, but I have yet to find any ASME codes or otherwise in CSA to justify it yet. Is there any other resources I can reference?





RE: Blowdown vessel water inlet distinctions - Clarification needed
RE: Blowdown vessel water inlet distinctions - Clarification needed
In large boilers, continuous blowdown systems transport water from the main steam drum to a separate vessel where flash steam is harvested and returned to the system. Dissolved solids go to waste. This system is necessary to control boiler water purity and control internal corrosion.
Intermittent blowdown systems are taken from the bottom of the boiler (mud drums) and are the responsibility of the boiler operator. This system removes the "big chunks" that will accumulate and eventually ruin proper heat transfer and allow accelerated corrosion. All of this water and solids must go to a separate vessel and to waste
Your piping designers may want to turn these two separate systems into one ...... but they shouldn't
https://www.pennseparator.com/
MJCronin
Sr. Process Engineer