The working principle of the flat flow dissolved air floating machine

The untreated sewage first enters the super filter for pretreatment, gets the preliminary purification through the screening filter, and the treated sewage is pumped or flows to the air floatation machine, and the appropriate flocculant is added to condense.Submersible deep s concave aerator is to form a vacuum area in the water by using the high-speed rotation of the loose air impeller at the bottom of the air conveying pipe. The air on the liquid surface is sucked into the water, and then the micro bubbles are generated, and the spiral type rises to the surface, and the oxygen in the air also enters the water.

Because of the pressure imbalance between the gas-water mixture and the liquid, a vertical upward buoyancy force is created, bringing the suspended material to the liquid level.In the process of ascending, the microbubbles will attach to the suspended objects, which will be kept at the liquid surface by the support of these bubbles after reaching the liquid surface, and will be cleared by the radial airflow thrust

The suspended solids floating on the surface of the water are continuously removed by the trolley (or chain type) slag scraper, which moves along the entire liquid level and pushes the suspended solids from the inlet end of the air float tank to the outlet end. The sludge collected is sent to the sludge collection tank for storage and collection through the inclined metal plate.

For SS who can sink, some design is to gas reflux measures to float, imagine if SS is greater than the proportion of water, so no matter what is difficult to float to the surface of the gas, so we designed precipitation cone, as a result of the water flow rate is relatively slow, can undertake no interference slowly precipitation, simply let the precipitation in the cone can be sinking SS, then emissions on a regular basis.

After purification, sewage enters the overflow tank through the outlet below the metal before discharge. A water level regulating device is designed on the overflow tank to control the water level of the air float tank, so as to ensure that the mud scraper will not scrape the sewage into the scum discharge pipe.