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Basic Principles For Designing A Vacuum Deaerator For Seawater


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#1 gohar.m

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Posted 19 July 2017 - 02:43 AM

As part of my final year degree I'm designing a water injection system for an offshore platform. I've got to design a de-aeration tower and have opted for a vacuum deaerator (due to the platform operating a non-continuous flaring regime). I'm trying to remove Oxygen from the water to prevent corrosion and bacterial growth.

I'm struggling to find any sort of design guidelines. I'm looking to calculate mass transfer variables such as HTU and NTU, the packed column height, the column diameter, the vacuum pump requirements etc but I'm not sure where to start.

Just wondering if anyone could point me in the direction of a useful resource - it seems this subject is more of a vendor operation so I'm struggling.


The only thing I can assume is that Henry's Law will be important - a good estimate of the gas solubility. A 2 stage process would obviously be preferable but I have no idea how to actually design the column.

Any help or guidance would be superb.

Currently the only feasible information I've got is in a journal "Vacuum degasifier: comprehensive modelling and simulation" but I'm not sure how credible a source it is.

Thanks! 



#2 breizh

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Posted 19 July 2017 - 04:36 AM

Hi ,

Same post , exact wording  in 2012 !!!!

https://www.cheresou...ater-injection/

 

Breizh


Edited by breizh, 19 July 2017 - 04:40 AM.


#3 gohar.m

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Posted 19 July 2017 - 07:32 AM

@Breizh 
Yeah, but there was no reply to that post, and i have exactly the same question. I don't think there is any problem with posting again!


Edited by gohar.m, 19 July 2017 - 07:32 AM.


#4 breizh

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Posted 19 July 2017 - 08:45 AM

Well ,

You may consider Google to support your work .

 

a)

http://enhydra.co.uk...ion_2015_v3.pdf

 

B)

Get a copy of GPSA , chapter 18 page 17 and 18

 

Good luck.

Breizh


Edited by breizh, 20 July 2017 - 01:19 AM.


#5 gohar.m

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Posted 20 July 2017 - 01:38 AM

Thanks Breizh, but these are all general explanations, they don't provide design calculation methods and equations.



#6 breizh

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Posted 20 July 2017 - 04:04 AM

Hi,

You may consider the contact in the link supplied , they may be generous to give you pointers/methodology  for your design and calculation .

 

 

https://www.google.f...f=1500542696233

 

.

Good luck

Breizh


Edited by breizh, 20 July 2017 - 04:21 AM.


#7 gohar.m

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Posted 20 July 2017 - 04:20 AM

Hi, I did contact several companies... They just give me the final answers not the calculation methodologies!



#8 Napo

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Posted 27 July 2017 - 09:25 PM

Gohar.m,

 

I attatched information related for your question.

 

The archive "Water Deaeration", is from the book: "Absorption and Stripping", by P. Chattopadhyay, Edited by: Asian Books Private Limited, New Delhi, 2007.

 

The archive "Vacuum Deaeration" has some references of articles (papers) about your questions, many of them you can found in the web.

 

Napo.

Attached Files



#9 F.rashidi

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Posted 13 July 2021 - 03:48 PM

Gohar.m,

I attatched information related for your question.

The archive "Water Deaeration", is from the book: "Absorption and Stripping", by P. Chattopadhyay, Edited by: Asian Books Private Limited, New Delhi, 2007.

The archive "Vacuum Deaeration" has some references of articles (papers) about your questions, many of them you can found in the web.

Napo.






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