DA tank vent discharge
DA tank vent discharge
(OP)
I have a new steam boiler plant installation with a 26,000 #/hr spray type dearator. We run the DA tank at the recommended 5 psi. The DA tank vent where the steam and bad gases continuously vent off was installed with a couple of elbows in it. We are getting intermittent spouting of liquid condensate out the vent pipe. I am pretty sure that the offsets are causing the liquid spouting out the vent on the roof, but am looking for some re-assurance an 2nd opinions here. If the contractor re-pipes the vent straight out the roof (no offset elbows) should I expect steam with a few droplets coming out? Or no drops of condensate (purely steam vapor) coming out the vent? I have seen other DA vents and just seen straight steam vapor though I didn't really study them.
Thanks
Thanks





RE: DA tank vent discharge
Edit: This issue reminds me of a somewhat similar issue I encountered in the past. Another engineer had installed an atmospheric vent on a raw water line (to get rid of an air release valve). Every so often, the vent would "burp" and spray raw water all over the room it was routed too - turns out, the line was routed with multiple, local low spots. During system transients, these low spots would accumulate water, until the transients eventually pushed the water out at the top.
RE: DA tank vent discharge
Or, replace one elbow with a tee and add a small drain pipe to grade. So, the water can be knocked down at tee and drained.
RE: DA tank vent discharge
RE: DA tank vent discharge
RE: DA tank vent discharge
Edit: Upon receipt of the DA, was the spray system (and specifically, spray nozzles) inspected to ensure they were free from damage? That may be another possible source of water entrainment in the vent...