& Air flotation equipment mainly organically combines an air pool, a dissolved air tank, a dissolved air pump, a dosing equipment and an air compressor or ejector. This kind of integration occupies a small area, is easy to operate, and does not require foundation work. It can also shorten the installation time and reduce the workload. The one-stop air flotation equipment mainly plays the role of solid-liquid separation (and can also reduce chroma, etc.). The integrated air flotation equipment mainly uses the microbubbles in the dissolved air water produced by the dissolved air system to bond with the suspended floc in the water. The suspended solids rise to the water surface with the microbubbles to form scum, which makes the suspended floc in the water The user unit of this equipment only needs to connect the adjusted sewage to the inlet and outlet pipes. Once debugged, it will operate normally without special personnel management, and the operation will basically reach an automated and unmanned management state. It is used in electroplating, printing and dyeing, food, slaughtering, oil refining, wastewater grease, chemical industry, papermaking wastewater and drinking water.
< Scope of application:
< . For chemical wastewater, pigments and paints, etc., the C removal rate is %, and the chroma removal rate is about %.
<. The chroma removal rate of printing and dyeing wastewater is about %, the C removal rate is about %, and the B removal rate is about %.
<. The turbidity of domestic drinking water and industry can be purified to below 10°C, and it also has a good effect on reducing color oxygen consumption
<. The oil content of oil refining wastewater can be reduced to less than mg/L, and the wastewater can be clarified.
<. The total content of heavy metal ions in electroplating wastewater, such as zinc, copper, lead, etc., is below, and the removal rate can be above %.
<. The fiber recovery rate of papermaking white water can reach about %, the C removal rate is about .%, and the clean water is completely reused.
<. The turbidity of bathing water in large pools can be stabilized below 10 degrees, and the bacteria in the water have dropped significantly.
<. The C removal rate of food slaughtering and tanning wastewater is about %, and the suspended solids removal rate is about %.
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< Working principle:
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< The working principle of the air flotation water treatment device is to inhale an appropriate amount of air through the ejector under a certain pressure (.~.) , and the reflux water form a saturated dissolved gas carrier in the dissolved gas tank, which is released by the release device under reduced pressure to obtain a large number of fine bubbles, whose measurement, particle size, and stability are all within the optimal value. The bubbles quickly adhere to the particles, emulsified oil, fiber and other impurities in the water, as well as the floc formed by the coagulation reaction, resulting in a state where the specific gravity of the floc is smaller than that of water, and the floc is forced to float quickly on the water surface, thereby achieving solid-liquid separation. The slag floats on the water surface and is scraped away, while the separated water enters the clean water tank through the bottom perforated pipe, part of the water flows back to become dissolved gas water, and the clean water is discharged through the valve.
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< Process description:
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< The air flotation equipment is divided into four parts: (1) dosing and coagulation part, (2) reflux water-soluble gas release part, ( 3) Air flotation part, (4) Electrical control part.
< (1) Dosing and coagulation part:
< Sewage is pumped from the sewage pool to the vortex reactor by a sewage pump. Generally, dosing is done in front of the sewage pump. This allows the chemical liquid and sewage to be fully mixed through the rotation of the impeller of the sewage pump. The medicinal liquid is supplied by the dosing device. The medicated sewage enters the vortex reactor, and the sewage is fully condensed.
< (2) Release of reflux water-soluble gas:
< The quality of the air flotation effect mainly depends on the effect of reflux water-soluble gas and its release. This air flotation uses high-efficiency and energy-saving air dissolving and releasing equipment. The compressed air from the air compressor and the treated return water pressurized by the water pump are fully mixed and dissolved in the dissolved air tank to form dissolved air water. The working pressure of the dissolved gas tank is generally ./c.
< (3) Air flotation part:
< The sewage coagulated by dosing enters the air flotation tank, and the dissolved air water in the dissolved air tank is suddenly reduced by the dissolved air releaser at the lower part of the water inlet and outlet pipes. Pressure causes the air dissolved in water to suddenly depressurize and release a large number of microbubbles. During the rising process, the microbubbles encounter the condensed suspended solids in the sewage. The microbubbles attach to the suspended solids and make them float quickly. In this way, all the suspended solids treated in the sewage float on top. Then they are scraped off and discharged into the sludge tank through the scraper on the upper part of the air flotation, and the bottom of the tank is discharged through the treated clean water.
< (4) Electrical control part:
< This equipment is equipped with an electrical control cabinet, which can achieve unmanned operation after debugging and installation. The electric control cabinet controls the operation of air-water pumps, foam scrapers, dosing mixers and other equipment.
Air flotation equipment sewage treatment equipment customization