Steam Accumulator Large Quantity Blowdown Advice

[AM424]

Hi, I believe that I have a fairly uncommon situation that I would like some advice on. I can provide more context if required, but the general question I have is as follows. Are there any industry solutions for handling large quantities of blowdown water in a relatively short timescale? Looking at max 5k-8k gal per blowdown per accumulator, across a bank of up to five accumulators. The largest blowdowns would be during accumulator warm up and initial charge. Any advice or resources that might prove helpful would be greatly appreciated.

These accumulators were relocated and used to blow down into a retention pond through 4in lines roughly 30ft in length. Unfortunately at the new location, there is no access to the pond nor is it environmentally acceptable as far as I'm aware.

Hopefully someone has some insight, thanks!

 

[FacEngrPE]

I would handle this the same as boiler blowdown. The minimum volume of the receiving blowdown vessel is approx 3x of the blowdown volume. Then the liquid needs to be drained before the next blowdown. If you use an open top tank expect some liquid to splash out the top, depending on how the top of the tank is arranged.
Temperature limit comes from either environmental regulations or your sewerage authority, and is usually measured at your defined point of discharge as stated in the applicable regulations (perhaps your industrial stormwater permit).

The National Board of Boiler and Pressure Vessel Inspectors published NB-27, A Guide for Blowoff Vessels, 2024 Edition
The 2019 version contains more technical detail in blowdown system design. NB-27 2012 A Guide for blowoff vessels