I'm currently working in a Chemical Plant as an intern, and I was given a task to improve the efficiency of the blower, which is already in place right now, by designing a new blower for the appropriate flow rates.
We have a filling station in the plant for HCl liquid, which fills the HCl (30-32% conc. at 20 m$^3$/hr) into tankers for transportation purposes. The problem is when HCl is filled up in a tank, it releases fumes, which are harmful for the people present near the filling station.
We have to recommend a blower, so that most of the generated fumes can be treated at an appropriate flow rate. But we don't know how to proceed with this, as we wouldn't know about the evaporation rate of HCl while it is flowing inside the tank.
Some technical information: