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Flue Gas Quench Tower Design

quencher heat transfer

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#1 Keyboard101

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Posted 30 May 2017 - 11:46 PM

Hi,

I am designing a Quencher Tower for Flue Gas for of MSW Incineration Plant. The flue gas need to be cooled down from 850 - 950 deg C to 150 - 250 deg C. The quenching agent is water at 30 deg C. The flow is co-current flow with dry bottom vessel. At the moment, we have calculated the diameter to be 2.0m. However, I have no idea how to calculate the height of the tower.  :wacko:



#2 breizh

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Posted 31 May 2017 - 12:33 AM

Hi ,

Did you try Google ? I've added a document from my friend's library :)

 

http://www.chemicalp..._whitepaper.pdf

 

Hope this is helping you.

 

Breizh



#3 Joan Pinol

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Posted 27 September 2022 - 08:11 AM

Hello, I have the same problem, and the link does not work properly. in addition, i have searched in google and I didn't find anything 

 

thank you in advance



#4 latexman

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Posted 27 September 2022 - 09:01 AM

I searched using "gas-water direct contact heat transfer" and got 430,000,000 hits.  That's no guarantee any of it is useful, but . . .

 

There appears to be pertinent information in the "Liquid-Gas Systems" chapter in Perry's Handbook.



#5 horatorres

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Posted 28 September 2022 - 08:09 PM

Quenching is a fast process, usually you consider  a 5 theoretical trays space to find the upper size as a preliminary approach.

 

Check the link, 

https://www.academia...Quencher_Design

 

There are several design considerations, I found some very easily in google.. write in search  hot quench tower design, and find the one close to your case

 

Horacio



#6 horatorres

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Posted 28 September 2022 - 08:16 PM

at home there is a Excel sheet

 

https://www.cheresou...esulfurization/



#7 breizh

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Posted 02 October 2022 - 06:57 AM

Hi,

Pay attention to the document shared from academia, errors in the calculation of Delta T ml (counter current contactor not co current), term missing in the calculation of Z^0.5   and mix up of units.

 

Breizh 



#8 breizh

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Posted 05 October 2022 - 10:25 PM

Hi,

In addition to my previous reply consider this paper where the correlation is in SI units with an example.

Good luck

Breizh 



#9 rajeshp79

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Posted 06 March 2023 - 05:17 PM

Hi Breizh, which paper you are referring to? Where is the correlation in SI unit as the academia one units are not correct and tried several ways but answer doesn't match. 



#10 breizh

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Posted 06 March 2023 - 06:08 PM

Hi,

Take a look at this spreadsheet .

Breizh



#11 rajeshp79

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Posted 07 March 2023 - 05:28 PM

Hi Breizh,

 

Your spreadsheet is very helpful. Thank you for sharing. I have a quick question on pressure drop calculations. Normally water flow is counter-current and pressure drop certainly should be less than a packed bed and it is easy to estimate the pressure drop across the packed bed. For such a spray tower do you recommend any particular correlation for pressure drop calculations?



#12 breizh

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Posted 07 March 2023 - 08:09 PM

Hi,

The head loss of this type of equipment is very minimal, you need to focus on the head losses of the nozzles (see vendor's catalogue).

https://www.pnr-fran...CTG_SH07_BR.pdf

 

To me this is not a concern.

 

Another good reference to support your work on heat transfer and direct contact liquid gas. 

Good luck

Breizh 



#13 breizh

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Posted 23 March 2023 - 06:20 AM

Hi,

You need to review your calculation, figures are weird.

Good luck

Breizh 



#14 rajeshp79

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Posted 23 March 2023 - 08:53 AM

I agree with you. I performed sensitivity analysis and figured out the issue. 






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