2 replies to this topic

[chemks2012]

Hi All,

We have a GRP vessel [2m3 total capacity] containing about 500 litres 30% HCl at maximum 60 deg C. During reaction, 50kg powdered raw material is added to the vessel through the open hatch of 400mm X 400 mm. To avoid the fumes in the plant building, we have acid fume scrubber with fan connected to the GRP vessel with 8” vent line i.e. 8” vent line is connected between vessel top and the scrubber fan inlet – scrubber fan is fitted at the scrubber inlet to aid fume extraction through scrubber.

Please note that hatch is kept open all time [fully or partially] while scrubber fan is on.

My queries is

• How do I need to calculate the flowrate of acid fume/vapour at the 8” vent inlet to design the scrubber?
• I believe that once the acid vapour flowrate is known, I can calculate the pressure drop in the vent line to design the scrubber fan.

Any help please?

Thanks in advance
KS

[breizh]

Let you measure the velocity of the gas entering the scrubber and then multipying by the section you will get the flow rate . Everything else will be guess.
Let you consider pitot tub or other means.
Hope this helps
Breizh

[Dazzler]

Hi chemks,
A while back I posted some info about hydrochloric acid and occassional difficulties in scrubbing this if an acid aerosol mist forms.

See my post within this Forum question below:
http://www.cheresour...n-hcl-scrubber/

Dazzler