Chemical addition in refining

[lacajun]

How and what kind of chemical injection is done in refineries? Is the amount added measured? What are the problems with chemical addition systems?

Thank you in advance!

 

[JLSeagull]

What unit in a refinery? Refineries include boilers and cooling towers. Are you only interested in the hydrocarbon streams?

Chemicals include corrosion inhibitors, anti-foam additives etc. Often the flow rate is small and set by a PD pump instead of measured. However, Coriolis meters also measure injection rates and totals.

 

[lacajun]

I was primarily interested in hydrocarbon streams. Any maintenance issues with the PD pumps over or under injecting? Is there a controller on the chemical addition, since you are using a Coriolis meter?

I haven't worked on boilers or cooling towers much so any information there will be an education for me.