The venturi scrubber is one of the most efficient gas cleaning devices to remove the contaminated particles
from gaseous stream during severe accident in nuclear power plant. This study is focused on the
dust particle removal efficiency of the venturi scrubber experimentally and theoretically. The venturi
scrubber encapsulates the dust particles in petite water droplets flowing into it. The water injected into
the scrubber is in the form of water film. The study investigates the removal efficiency of venturi scrubber
for throat gas velocities of 130, 165 and 200 m/s and liquid flow rates 0.3–1 m3/h, whereas dust concentration
ranges between 0.1 and 1 g/m3. The hydrophobic titanium dioxide (TiO2) particles having density
4.23 g/cm3 and mean diameter of 1 lm are used as dust particles in this research. Filtration technique is
used to measure the concentration of dust particles at inlet and outlet. Experimental results show that
the removal efficiency is higher with the increase of throat gas velocity and liquid flow rate. A mathematical
model is employed for the verification of experimental results. The model concurs well with the
experimental results.