Venturi Scrubber
From Preconditioning
Our Venturi scrubber utilises the kinetic energy of an air stream to accomplish dust collection through the principle of impaction. The contaminated air stream is accelerated through a throat section reaching velocities between 45 and 120 meters per second. Water is introduced ahead of the throat and atomised by the high air velocity. Dust particles collide with and are captured in millions of small droplets. In order to avoid build-up of dust at the entrance of the Venturi, a sharp wet/dry zone is created. Water is injected tangentially around the top perimeter of the converging section to assure complete wetting of all surfaces. This design is known as the wet approach concept. In the long diverging section behind the throat, static pressure is regained as the velocity of the gas stream is reduced. The water-laden gas stream changes direction in a flooded elbow before entering the cyclonic separator tangentially where droplets are removed by centrifugal force. Water in the bottom of the elbow forms a cushion that prevents the high velocity water-laden gas stream from eroding the elbow itself. Clean, droplet-free air passes through the separator outlet and slurry is continuously drained from the bottom. With our Venturi scrubber with variable throat dust collection, efficiency remains constant over the entire range of the design air flow range. Moreover, Venturi pressure drop, and thus dust collection efficiency can be kept constant over a wide air flow range by (automatic) adjustment of the cone position.
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