The air flotation machine is a water treatment equipment that produces a large number of fine bubbles in the water by the dissolved air system, so that the air is attached to the suspended particles in the form of highly dispersed tiny bubbles, resulting in a state with a density less than that of water, and uses the buoyancy principle to make it float on the water surface, thereby realizing solid-liquid separation. The air flotation machine is divided into super-efficient shallow air flotation machine, vortex air flotation machine, and horizontal air flotation machine. It is used in water supply, industrial wastewater and urban sewage treatment. The advantages of the air flotation machine are that it has the characteristics of low investment, extremely small floor space, high degree of automation, and convenient operation and management.
The air flotation machine is a machine that uses small bubbles or tiny bubbles to make impurities in the medium float to the surface. This air flotation device can be used for some fine particles in the water body whose specific gravity is close to that of water and are difficult to sink or float due to their own weight.
In terms of water supply and drainage, the pre-treated water quality, except for some raw water bodies with more sand and sewage with heavier mechanical impurities, is mostly light suspended particles. For example: algae in lakes, reservoirs and some rivers; plant residues and tiny colloidal impurities; dye particles in the printing and dyeing industry; short fibers in the papermaking and chemical fiber industries; droplets of petroleum and organic solvents in the refining and chemical industries; heavy metal ions in electroplating and pickling wastewater; electrophoretic paint wastewater, etc.; all are lightweight particles with a specific gravity very close to that of water. For these raw waters, if the traditional sedimentation method is used, the effect will inevitably be very poor, especially under low temperature conditions in winter, due to the deterioration of coagulation and hydraulic conditions, the treatment effect is more difficult to guarantee. It can be imagined that if the flocs that are difficult to precipitate are forced to sink, it will inevitably be twice the result with half the effort. It is better to take advantage of the situation and artificially introduce bubbles into the water body to make them adhere to the flocs, thereby greatly reducing the overall density of the flocs, and forcibly float them by the rising speed of the bubbles, so as to achieve rapid solid-liquid separation. In this sense, the emergence of flotation technology is a revolution in gravity sedimentation, which has opened up a new field of solid-liquid separation technology.
OLTE flotation machine is a kind of equipment for removing suspended solids, grease and various colloids from various industrial and municipal sewage. The equipment is widely used in the treatment of industrial wastewater and municipal sewage such as oil refining, chemical industry, brewing, vegetable oil production and refining, slaughtering, electroplating, printing and dyeing.
Vortex flotation machine is generally used when the treatment effect is not very high, and the general treatment effect COD removal rate can reach about 80%.
Use of dissolved air flotation machine
The pressurized dissolved air flotation system using bronze gas-liquid mixing pump omits the complex settings such as pressure pump, air compressor, ejector, high-pressure dissolved air tank, etc. It has created the "one-minute debugging method". Simply put: the outlet valve is fully opened, and the water inlet valve is adjusted until the pressure gauge shows the pressure required by the treatment system, and the debugging is over. The advantages of OLTE dissolved air flotation machine are good treatment effect, convenient debugging, and labor saving. Considering the labor cost saving and effect, it is the best choice.
Compared with the vortex flotation machine, the dissolved air flotation machine must be equipped with an OLTE gas-liquid separation tank. OLTE gas-liquid separator can be adjusted automatically, not only the performance is stable, but also can be frequently turned on and off without re-debugging, that is to say, this dissolved air system only needs to be simply debugged once.
Overall, OLTE gas-liquid separator is the key to achieve automation, and it is also the aspect with the largest investment compared to the vortex air flotation machine. Both types of air flotation machines have their own advantages and disadvantages. The specific choice should be based on the specific situation.
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