Chemical Availability Calculation

[Corroneer]

Hi everybody

A quick question about calculating the chemical availability. How would you know that you are pumping the required dosage for a pump that is not connected to the DCS?
The only way I can think of is to do the pump performance test (1-min test) every day. Or, less preferably to me, do a chemical residual test every day.
Any other ideas?

Regards,
A

 

Are you in the right forum?

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[Corroneer]

@ironic_metallurgist: yes I am. My question is about corrosion inhibitor availability.

 

[Compositepro]

Chemical metering pumps or dosing pumps are used for your type of application. These are generally diaphragm pumps that deliver a manually adjustable, but very consistent, volume per stroke. Counting strokes gives total volume.

 

[springrise]

measure level decrease in the feed container.. if the level decrease is large enough to be confidently measured..

 

[SJones]

Are there no flow meters in the injection lines? Online chemical monitoring with LuxAssure?

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

 

[Corroneer]

Flow meters are defective/do not exist. And no LuxAssure - might be a good technique indeed!

 

[Dhurjati Sen]

Dear ARajab,

Check the chemical content (corrosion inhibitor, say phosphate) in the day tank once every shift (8 hours). The result over a few days would allow you to reach at the required quantity of the inhibitor that is needed for the system.

Regards.

DHURJATI SEN

https://www.nace.org/people/dhurjatisen

 

[KoachCSR]

Are regular samples taken of the process fluid to track chemistry? I would expect, if nothing else, your samples would readily indicate if your pump was degraded or malfunctioning. Also agreed with tracking chemical volume in the feed container - which I also assume takes place so that you know when to swap it out or refill it.