How to Place Deresonating Baffles in a Shell and Tube Heat Exchanger?

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Discussion Overview

The discussion revolves around the placement of deresonating baffles in shell and tube heat exchangers, focusing on their design and positioning to mitigate resonation issues. Participants explore practical considerations and engineering insights related to this topic.

Discussion Character

  • Technical explanation
  • Exploratory
  • Debate/contested

Main Points Raised

  • Some participants suggest that engineers can identify areas prone to resonating, potentially using tools like a stethoscope to locate optimal positions for interior baffles.
  • There are mentions of baffles being placed parallel to the tube bundle, with some participants noting that anti-swirl baffles may be positioned near the tube inlets and outlets.
  • Concerns are raised regarding maintenance, as baffles within the bundle may need to be removed for access to tube sheets, while those in the piping leading to the exchanger may not.
  • Differences in flow and pressure on the shell side are highlighted as factors that could significantly impact the effectiveness of baffle placement.

Areas of Agreement / Disagreement

Participants express varying opinions on the best practices for baffle placement, indicating that there is no consensus on a definitive approach. The discussion includes multiple viewpoints and considerations without a clear resolution.

Contextual Notes

Participants acknowledge that the effectiveness of baffle placement may depend on specific conditions such as flow rates and pressure differentials, which are not fully resolved in the discussion.

jeewana
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Hi,

Anyone knows how to place the DERESONATING BAFFLES in a Shell and Tube heat Exchanger? How does it look likes?
 
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jeewana said:
Hi,

Anyone knows how to place the DERESONATING BAFFLES in a Shell and Tube heat Exchanger? How does it look likes?

I am sure some engineer can locate the areas that are most prone to resonating, or even just someone with a stethescope - that is the place for the interiour baffles ... the ones I am familiar with lie within and to parallel the tube bundle.

I have also seen anti-swurrl (is that a word?) baffles placed near the tube inlet and outlets. If they are within the bundle they have to be removed for maintenence on the tube sheets etc - if inside the piping leading to the exchanger, not.

Other than that - differences in flow and pressure on the shellside can make a big difference.
 
Can anyone help me to find the the thermal properties (Density,Heat capacity,viscosity,thermal conductivity) of WHITE LIQUOR used in pulp industry?

[WHITE LIQUOR is a mixture of NaOH,Na2S,Na2CO3.]
 
Does this help? I think this is something that you'll need to calculate yourself.
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WHM-4MBJK4C-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1174338322&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=02b5229bb0f9b771161a241ec0872a5d
 
Last edited by a moderator:
Thanks for the reply.

Yes, As you said this should be calculated since the percentages of its content varies. However I was expecting some typical values for a design.

Thanks again.
 
croghan27 said:
I am sure some engineer can locate the areas that are most prone to resonating, or even just someone with a stethescope - that is the place for the interiour baffles ... the ones I am familiar with lie within and to parallel the tube bundle.

I have also seen anti-swurrl (is that a word?) baffles placed near the tube inlet and outlets. If they are within the bundle they have to be removed for maintenence on the tube sheets etc - if inside the piping leading to the exchanger, not.

Other than that - differences in flow and pressure on the shellside can make a big difference.


Thanks for the reply. It helped me to get some idea.
Jeewana
 

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