Chemical feed of NaOH
Chemical feed of NaOH
(OP)
I have a client that has a magnetic flowmeter with erratic readings. Recent system changes (move NaOH feed point to upstream of meter) is causing low flow readings. Testing included monitoring flowmeter without chemical and starting chemical feed with as much as a 30 percent drop in flowmeter value. Dosage rate approx. 40 ppm (50 percent concentration of sodium hydroxide fed at 2.8 gallons per 36000 gallons). My first reaction was electrical property of the NaOH affecting the field readings of the meter and then a concern over grounding of the meter to eliminate any stray voltages. Anyone with past experience of similar problems adding NaOH ahead on magnetic flowmeter?





RE: Chemical feed of NaOH
RE: Chemical feed of NaOH
For processing reasons, the concentration can decrease significantly from its design value, as the caustic changes to other sodium salts. (scrubbing operation). Will this have an effect on the readings?
Do the build-ups of iron or caustic occur on the electrode or the flow tube?
Can electrode or flow tube material effect this?
Thanks
RE: Chemical feed of NaOH