Working principle of air flotation equipment

  The purpose of mastering the working principle of air flotation equipment is to have a detailed understanding of the equipment in all aspects, so that the operator can quickly judge where the fault is in the process of using the equipment
Today, I will introduce its working principle in detail
For more information: http://www
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com 。 The work of air flotation equipment mainly depends on the hydrophilic and hydrophobic surface of suspended solids
The hydrophobic particles are easy to attach bubbles on the surface, so the air flotation method can be used
Hydrophilic particles can be converted to hydrophobicity after being treated with appropriate chemicals
In the air flotation method in water treatment, coagulants are commonly used to make colloidal particles form flocs
The flocs have a network structure and are easy to intercept bubbles, so as to improve the air flotation efficiency
Moreover, if there are surfactants (such as detergents) in the water, they can form foam and also attach suspended particles to rise together
The equipment used in the air flotation method includes the air flotation tank for completing the separation process and the auxiliary equipment for generating bubbles
Bubbles will quickly adhere to the particles, emulsified oil, fiber and other impurities in the water and the floc surface formed by coagulation reaction, resulting in that the specific gravity of the floc is less than that of the water and is forced to float on the water surface due to buoyancy, so as to achieve the effect of solid-liquid separation
The slag floats on the water surface and is scraped away, while the separated water smoothly enters the clean water tank through the perforated pipe at the bottom, part of the water returns as dissolved air water, and the clean water is discharged through the valve
The air flotation method for water purification is to dissolve a large amount of gas into the water as the working liquid under high pressure
When the pressure is suddenly reduced, numerous micro bubbles are released to bond with the impurities in the water after the mixing reaction, so that their specific gravity is less than 1, and float on the liquid surface to form a mixture of foam (gas and water particles), so as to separate the pollutants from the wastewater and achieve the purification effect
The working principle of air flotation equipment is roughly the above content, and the core is air flotation method
A brief understanding of the principle is helpful for later use