Venturi
Scrubber
High energy Venturi Scrubbers are
used for the removal of course to very fine particulate.
Even sticky and moist particulate can be collected
easily. Removal efficiencies of 99.9% for particulate
sizes down to 0.1 micron are achievable. Water sprays at the
inlet of the Venturi can quench hot gases from processes such as
casting, glass manufacturing, forging and incineration.
The throat of the Venturi Scrubber can be
manually or automatically adjustable to accommodate variable gas
flow rates. Venturi Scrubbers are resistant to clogging,
scaling and wet/dry line build up since the venturi walls are
continuously wetted.
In the Venturi Scrubber the incoming particulate
laden gas is accelerated to a high velocity in a diverging section
just before entering the scrubber throat where it comes in contact
with the scrubbing liquid, typically water. The liquid is
atomized into fine droplets that entrap the particulate with very
high collection efficiency. The higher the pressure drop
across the throat, the higher the collection efficiency.
After leaving the venturi throat, the cleaned gas
decelerates through a diverging section and the particulate-laden
droplets collide and agglomerate. The large droplets are
driven into the flooded elbow, that serves as an abrasion barrier,
and flow into the bottom of the cyclonic separator. Droplets
that are too small for collection at the flooded elbow are
collected in the cyclonic separator and flow into the bottom of
the separator where a vortex breaking baffles keep the collected
water flowing easily into the sump tank. Water from the sump
tank is recirculated back to the inlet of the Venturi. A
small portion of sump water containing 3% to 5% solids is bled off
to a drain. Fresh make-up water is introduced into the piping
leading to the venturi inlet so that the cleanest water meets with
the incoming gas.
All Turner EnviroLogic Venturi Scrubbers are
complete skid mounted systems that are pre-piped and pre-wired to
minimize field installation efforts. Many grades of carbon
and stainless steels are used depending on the temperature and
corrosive effects of the gases to be scrubbed. Chemical
addition systems can be added to neutralize acid
gases.
