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Formaldehyd Scrubber/column

venturi spray scrubber packed column

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#1 Xambis

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Posted 05 December 2019 - 10:09 AM

Dear Cheresources Community, 

 

This is my first post and I am having some issues with a  ongoing regarding gas scrubbing/columns for particulate matter and gas absorption. 

 

The goal is to clean a fairly large  gas flow rate from a diluted particulate matter and formaldehyde concentration. The inlet values are for 400000 m³/h , 200 mg/m³ and 45 mg/m³ respectively. The outlet goal is < 30 mg/m³ and 10 mg/m³ respectively. 

 

Now, the particulate matter scrubbing is planned to be done by a venturi or spray tower (depends on PSD) and until now a few vendors have suggested one or 2-4 absorption columns for Formaldehyd-Absorption using water as solvent. 

 

I have read quite a few Information about Formaldehyd and its simultaneous reaction with water. However, according to henrys-law.org there are a few Henry-constants that have indeed accounted for hydration reaction and have fairly small values. I have regressed the BI -parameters for NRTL and UNIQUAC based on experimental data and also conclude to a fairly good absorption in water. 

 

I was wondering if anyone has any experience on mass transfer rates in the Venturi or Spray tower and if you think a fairly expensive packed column can be avoided. Unfortunately the vendors refuse to really take a closer look as the project itself is in an early stage. 

 

I appreciate your answers 

Best 

Xambis, Chemical Engineer 



#2 thorium90

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Posted 05 December 2019 - 10:16 AM

Based on the numbers you have mentioned, I would agree that venturi scrubber is a very reasonable option to use.



#3 Xambis

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Posted 05 December 2019 - 11:07 PM

I would also go with a venturi or a spray tower, however I need to quantify that in terms of mass transfer.  

 

Best 

 

Xambis



#4 breizh

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Posted 05 December 2019 - 11:27 PM

Hi,

I'm not sure what you expect from us . I've attached some literature to support  your work .

 

https://www3.epa.gov...ts/fventuri.pdf

 

Note : You will find other documents issued by Ankur using the search engine in this Forum .

 

Good luck

Breizh

Attached Files


Edited by breizh, 06 December 2019 - 03:23 AM.


#5 Xambis

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Posted 06 December 2019 - 07:35 AM

Hello Breizh, 

 

Thank you very much for the attached files. Especially the article regarding the spray scrubber!.  

 

I was just asking if anyone has had any experience with a similar issue. 

 

Best

Xambis






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