The smaller the bubble diameter and the more bubble numbers it has during the use of air flotation, the better effect the air flotation will be.Inorganic salts in the water can accelerate the bubble burst and merged, dosing coagulant can promote the condensation of suspended solids, make its adhesion in the bubble buoyancy, can join the flotation agent make hydrophilic particles into hydrophobic material and the surface adhesion on the bubble, bubbles rise.
Common types classification of air flotation
1. Horizontal-flow dissolved air flotation machine
The way for horizontal-flow dissolved air flotation machine to dissolved air is pressure jet , the air flotation is the comparison of the present domestic use a wide range of structure is relatively simple, site installation is simple operation, suitable for all kinds of industrial waste water and municipal waste water pretreatment and subsequent processing.
2. High efficiency shallow air flotation machine/super-efficient shallow air flotation machine
High efficiency shallow air flotation machine/super-efficient shallow air flotation machine when making use of the dissolved air by pressure jet , this kind of air flotation in the domestic use is extensive, especially in pulp and paper industry, other industries also began to use in recent years, because of its complex structure, technical content is relatively high.
3. Combination air flotation machine
The dissolved air way of combination air flotation machine is pumps' front negative inspiratory pressure, this kind of air flotation in the domestic use is more common, because of its no need for air compressor and pressure vessels (except for large storage tanks) and other characteristics, basic can replace the traditional pump, air compressor, dissolving tank and other form of pressurized dissolved air flotation.
4. Cavitation aerator
The way to dissolved air of cavitation aerator is the impeller at high speed rotating negative pressure to produce microbubbles, which is widely used in the domestic application, which is mainly in pretreatment section of oily waste water.
5. Sequential air flotation machine
The way to dissolved air of sequential air flotation machine is concave + combination (dissolved air pump), actually this kind of air flotation in China have long used, namely the cavitation aerator +dissolved air flotation, it use more in oily waste water treatment.
6.Catalytic oxidation air flotation machine
The dissolved air of catalytic oxidation air flotation machine is the catalytic oxidation tank + pressurized jet, which is seldom used in the country, it is mainly used in the special waste water with high concentration, COD and other difficult treatment.
7. Multi-stage air flotation machine
The dissolved air of the multi-stage air flotation machine is pressurized jet , which is also more widely used.It is characterized by small footprint, high processing capacity and high impact load.http://www.shallowairfloatation.com/