Leading Edge Design,
Stability,
Solid Performance...
Good reasons to select Air Mixing Tubes from DAF Corp for your next dissolved air flotation clarifier installation.
Not ready to install a new clarifier? Upgrade your existing system to extend its life and increase performance by
refitting with one of ten models ranging in capacity from 15 GPM to 1000 GPM.
Principle of Operation
The DAF air dissolving mixing tube (AMT) is an essential complement to a dissolved air flotation clarifier.
The AMT produces microscopic, uniformly sized air bubbles that attach themselves to the suspended particles
in water making them strongly buoyant. Given proper water conditioning and suitable fine bubble size, even solids
with densities higher than that of water can be raised to the surface of the clarifier.
The system requires that a certain portion of clarified water be recirculated back through the AMT recycle pump from
the clarifier. This recycled water is processed through the AMT and is injected back into the clarifier mixed with the
raw influent. The AMT is suitable for operation with clarifiers of any tank geometry.
During operation, the water is pumped into the tube at pressure in the range of 60-78 psig with the recycle pump.
The supply feed pipe is offset and positioned tangentially to the tube. Water in the tube develops a rotating action
and a vortex forms along the central axis of the tube. Compressed air is added through the air dispersing panels and
mixed rapidly with water in the AMT. The combination of pressure and agitation causes air to dissolve into the water.
The high mixing energy created in the AMT maximizes its efficiency.
Leaving the AMT, the super-saturated water passes through a pressure release valve where it is reduced to the
pressure of the clarifier inlet. Under this condition the water can no longer hold the volume of dissolved air that
it did at the elevated pressure. Spontaneously, very fine air bubbles of approximately 10-50 mm diameter form, giving
the recycled water a milky appearance. Air bubbles of proper size for DAF clarification rise to the surface of a
container at the rate of approximately 8-12 inches per minute.
Please scroll down to view information about DAF Corp Air Mixing Tubes:
AMT 1500 providing dissolved air to a paper machine save-all.
AMT 300 supplies about 85 gpm air-saturated recycled water.
AMT 150 provides up to 40 gpm of air-saturated water.
AMT 1500 has capacity of about 425 GPM. Unit shown is available for pilot trials.
