low flow acid feeding system
low flow acid feeding system
(OP)
I need to pump in less than 0.5 gpm of sulfuric acid to high pressure system which runs around 170 psi. Looking into using a small low flow high pressure metering pump. Looking into using a small low flow high pressure metering pump. It needs good accuracy. I handled quite bit of hazardous chemical but not this small flow rate. Has anyone had to design this type of system? I need some inputs.





RE: low flow acid feeding system
Make sure you utilize a 3 valve block and bleed so that water is not forced back into your acid tank.
You may consider diluting the acid stream so that you can pump a larger volume to improve accuracy.
RE: low flow acid feeding system
Are you pumping from a tank, a tote or a drum? Suction-side details differ depending on where you're drawing from. The pump vendors can provide advice but you do need to adjust to your particular circumstances using your own commonsense.
Anywhere you could potentially get dilution due to suck-back during shut-downs or loss of pump prime etc., you're going to have a corrosion problem. Remember- water WILL "climb" the injection point right up to your injection check valve, and this dilution will make heat and extremely corrosive dilute acid. Your injection point should either be above liquid level (if injecting into a vessel) or made of suitable non-metallic or non-metallic lined components to handle the diluted acid and the heat of dilution.
RE: low flow acid feeding system
RE: low flow acid feeding system
Why do the diaphragm pumps get a bad name? They're not very mechanically efficient, but they do work for long periods without maintenance. The flow is pulsile but you can get dual or triple heads or use pulse dampeners with good success. We use them in far more severe services than this. Haven't used Hydracell much, but we have used them on occasion without problem. American Lewa, Pulsafeeder, Bran + Luebbe, ProMinent Orlita etc. we've used very frequently with very good success.
RE: low flow acid feeding system