8 replies to this topic

[chanchalg]

Hello Everyone,

I am asked to develop the design of multiple eductors for a storage tank of 35m Dia and 15m Height to ensure the proper mixing of fluid. Only available data is inflow and outflow rates on tank i.e. 1160m3/hr and 2000m3/hr respectively and Nozzle size feeding the ring is of 12NB size.
I was going through previous reports and have found that there is and inner and outer ring of eductors is deployed which is feeded through recirculation pump. I didn't got any design basis and calculation for the same.
I have some very basic queries as listed below:

1. how to decide the number of eductors in outer and inner ring?

2. how to decide required flow rate and pressure to ensure proper mixing of product?

3. how to fix inclination angle of eductors nozzles?
4. how to decide the exit nozzle size of eductor?
5. how to calculate mixing time?
 

For resolving above queries if you can provide any suitable reference or guidance, that will be a great help of me. Waiting for your valuable response!

Thank You!

[breizh]

Hi ,

Did you try your favorite search engine , key words :  mixing eductor design 

 

https://www.spray.co...ng_eductors.pdf

 

https://www.s-k.com/...ng-eductors.cfm

 

 

good luck

 

Breizh 

[Bobby Strain]

This doesn't sound like a student query.

 

Bobby

[chanchalg]

Hi ,
Did you try your favorite search engine , key words : mixing eductor design

https://www.spray.co...ng_eductors.pdf

https://www.s-k.com/...ng-eductors.cfm


good luck

Breizh

[chanchalg]

Hi briezh!
Thanks for reply!
Actually I have already gone through the suggested documents but I couldn't get more details regarding decision of inclination angle, pump pressure etc. If you can tell something related to the same that'll be really helpful!

[latexman]

Inclination angle - no specific advice, but in general one usually does not want the liquid jets to break through the liquid surface.

 

Pump pressure - once the eductor system is pretty much finalised, do a hydraulic analysis of the system.  The pump pressure needed is the back pressure created at the pump's discharge flange by it's entire pipe, fitting and eductor system.

[breizh]

hi,

I asked our friend : https://www.spray.co...ng_eductors.pdf

you need to dig into the document (link attached)  and use your common sense .

note : prepare a requisition (detail of the tank)  , contact vendors (give them a call or drop them an email )

Hope this is helping you

Breizh 

[chanchalg]

hi,
I asked our friend : https://www.spray.co...ng_eductors.pdf
you need to dig into the document (link attached) and use your common sense .
note : prepare a requisition (detail of the tank) , contact vendors (give them a call or drop them an email )
Hope this is helping you
Breizh

[chanchalg]

Hi Briezh,
Thank you very much for your effort. I'm trying to understand the document. This is really helpful.
Thanks
Chanchal