The Aeromix dust collector is a low energy venturi type wet washer. Unlike many other types of venturi scrubbers, the gas flow in Aeromix is upward.
The operating principle of Aeromix is that after the first contact of water and contaminated gas in the Venturi throat, a very dense mixture is obtained by continuous recirculation in the Diffuser section and the dust and mist retained in the cyclone following the helical holder is recovered. Figure 1 shows the general flow principle.
The gases enter the throat portion of the Aeromix at very high speeds (26 to 35 m / s), where they come in contact with the recirculating water from the tangential pipes and their own weight. Cleaning liquid
(water in many cases) consists of a mixture of muddy water and feedwater from the cyclonic holder.
The pressure loss in the Venturi throat is between 75 and 200 mm SS. This pressure drop is directly proportional to the amount of recirculating water to the throat and the dust holding efficiency of the aeromix dust trap.
The increase in the amount of water flow in the throat increases the pressure drop as long as the gas flow remains constant, thus increasing the holding efficiency of the Aeromix.
Although all settings are made at the factory, the exact settings are made during commissioning. Essentially, only the adjustment of the feed tank throat valve to adjust the opening of the feedwater line hand valve in such a way that the pressure drop in the throat remains between 75-200 mm SS.
A manometer was used to show the pressure loss in the Aeromix throat. The gasses and the circulating water rise upwards after the throat and rise together in the Diffuser. Due to this decrease in speed, a large part of the water is poured back into the throat and mixed again with the new gas flow.
This internal circulation creates an extremely turbulent environment and greatly increases the potential for collisions with dust and liquid droplets. This internal recirculation is one of the world's best wet-type dust traps.
A quantity of washing water containing the powders contained therein passes through the helical retainer. With the effect of centrifugal force and directionality created by these helical wings, they flow into the bottom sides of the holding roller in the form of dust and mud that hit the walls of the upper retaining part and from here to the fattening tank with the effect of weight.
There are three sections inside the tank as can be seen from the detail picture of the fattening tank.
In the second chamber, the muddy water flows through the first section again, and is discarded as a sludge. The amount of the theoretical fresh feed water to the fattening tank should be equal to the total amount of water in the evaporation and the sludge that is generated due to the temperature. The required amount of feed water in the application The water required to completely wet the inside of Aeromix; depends on the type of dust and gases.
The amount of circulation water required for Aeromix can be set between 270 and 960 liters / hr for every 1000 m3 of gas. The required amount of fresh water is usually a very small amount of this recirculation value.
Aeromix can be used for every 1000 m3 of gas. It is a very small amount of money.
