DISSOLVED OXYGEN IN BOILER FEEDWATER
DISSOLVED OXYGEN IN BOILER FEEDWATER
(OP)
We have been obtaining higher than desired readings of dissolved oxygen within our boiler feedwater recently. Tests of the level of dissolved O2 in the suction of the boiler feedwater pump is currently 5 parts per billion and at the discharge it is 10 parts per billion. The question is: What can cause an increase in the level of dissolved oxygen within the boiler feedwater as it works its way through the pump?





RE: DISSOLVED OXYGEN IN BOILER FEEDWATER
jproj
RE: DISSOLVED OXYGEN IN BOILER FEEDWATER
How are u measuring the Do2 in suction and discharge?
If there are no leaks then the possibility of increase in O2 content at the discharge may be due to the following reason.
1. If you are measuring continously using a sampling system then take care that the sample pressure inside the flow through chamber (for the discharge sample) is same as the pressure that of the suction sample (i.e from the deareator).
2. Based on my experience i can tell you that there would be drastic difference if you use two types of measurement (i.e inline instrument for one measurement and measurement by sample conditioning for the other)
3. Check for any leaks in the sample tubing.
RE: DISSOLVED OXYGEN IN BOILER FEEDWATER
RE: DISSOLVED OXYGEN IN BOILER FEEDWATER