Hydrazine
Hydrazine
(OP)
Can anyone tell me where the best sample point for hydrazine would be on a HRSG. We had been sampling on the condensate, but I thought it would be better to sample on a drum. Any other ideas.
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RE: Hydrazine
If you sampled the drum water or downcomer liquid, it would not provide a true indication of oxygen ingress because the LP steam drum acts as a dearator, and strips the O2 off and the O2 passes out with the LP steam .
The steady state setpoint for O2 would be about 2-3 ppb O2, in order to avoid overfeed of hydrazine.
Most forms of hydrazine or carbohydrazide are n ot active until 300F, so any sample point upstream of the LP preheater/economizer is useless.
RE: Hydrazine
RE: Hydrazine
I hope that it can help you.
RE: Hydrazine