8 replies to this topic

[M.Aff]

Hello everybody,

I'm a newcomer in this forum and currently graduated in Chemical Engineering and now working with a great company dealing with pump and piping system.

My question here is:

There is a viscous liquid, that have viscosity is about 2000cP, that I need to pump it into production line, but there are small air bubble in the liquid and trap in the pipe system,

can a progressive cavity pump (PCP) eliminated the air bubble in the liquid? what i know is PCP is very efficient when dealing with high viscosity liquid.

Hope someone had experience it before and explain it to me.

thanks

[breizh]

^{You may consider diaphragm pump for your application ( 2000 cps) .
wilden pump or Delasco
Breizh}

[M.Aff]

Thank Breizh for the answer,

So PCP is not much suitable for this case??

[breizh]

Personaly I've experience using this type of technology for mud and slury with good success, not for so viscous material . For viscous material I always used diaphragm pumps .
Breizh

Edited by breizh, 17 July 2012 - 10:28 PM.

[M.Aff]

Dear breizh,

Our transfer medium is really critical not to have the air bubble inside, I want to clarify with you is it diaphragm pump can help me to eliminate those bubble? where i believe choosing centrifugal pump will make it more worse.

Since the kinematic viscosity is very high, so that it will take a very long time to wait for the bubble to disappear.

[Art Montemayor]

M.Aff:

You state that you are trying to pump a very viscous fluid (2,000 cP) that has air bubbles within it. You ask: “can a progressive cavity pump (PCP) eliminate the air bubble in the liquid?”

No pump is going to “eliminate” the air bubbles within the fluid. If the pump can pump the air-entrained fluid successfully, the air bubbles will remain within the fluid. Removing the bubbles, in my opinion, is something totally apart. You either remove the air bubbles before pumping – or after pumping (if you can pump the fluid successfully).

How you remove the bubbles is another unit operation.

I believe what Breizh is saying is that as far as the high viscosity is concerned, he recommends a diaphragm type pump. He is not commenting on removing the bubbles.

[breizh]

Art is perfectly right my answer was about pump technology vs Viscosity .
Breizh

[M.Aff]

Thanks Breizh and Art

[M.Aff]

Thanks Art,

so my understanding now is the pump itself will not influence in removing air bubble that trapped in the liquid, so I need to do something whether before or after through the pump.

what is the best way can we do to remove air bubble? is that apply the vacuum might be working?

thanks