FOWLEREX TECHNOLOGIES PTY LTD

HIGH EFFICIENCY	FOR LARGE VOLUMES
NON-PLUGGING	LOW ENERGY

Type D Scrubbers are used where dust particle sizing and process conditions require low energy inputs. (Scrubber Pressure drops less than 3.5 kPa.)

These energy requirements are below the range in which the collecting mechanisms of conventional venturi scrubbers begin to take full effect. Hence, the Type D Scrubber often matches the performance of venturi scrubbers while saving 20%-50% in operating horsepower.
The Type D model has a vertical flow design which requires a minimum of floor space. The cylindrical configuration improves rigidity with light gauge unitary construction.

A peripheral gas nozzle combines a low energy venturi effect with collection by impingement on the liquid bath. This combination provides optimum energy utilisation at low pressure drop.

In order to accommodate changes in process conditions or more stringent emission codes, the unit is designed to allow for variations in pressure drop by means of a simple internal adjustment of the peripheral gas nozzle.

Slurries are kept in suspension in the sump by the action of the gases being scrubbed.

Mist elimination is accomplished with the centrifugal action of a set of swirl vanes, and the droplets, once separated from the gas stream are returned by gravity into the sump.

Water needs are kept to a minimum by the unit’s ability to recirculate the heavily concentrated slurries, often contain as much as 5% solids by weight. The top gas outlet configuration makes stack connection simple; the flanged slurry drain can be connected to settling tanks, or piped for disposal with ease.

The Type D is simple, rugged, with no moving parts and excellent non-plugging characteristics. It can be made from a variety of corrosion resistant metals as well as light weight, low cost fibreglass reinforced polyester.

Scrubber of cylindrical shape shall be of the high efficiency internal office type with radial inlet. The gas to be cleaned passes through a peripheral nozzle and is jetted in a near vertical direction at high velocity into a static liquid bath, the level of which is maintained slightly below the bottom of the gas nozzle by means of an adjustable weir. The weir box shall be equipped with a gas-lock release mechanism. After leaving the liquid bath, gases shall pass through a centrifugal type spray eliminator and exit the scrubber through the top vertical discharge.