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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 


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.  





#4 breizh


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Posted 05 December 2019 - 11:27 PM


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




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


Good luck


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. 




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