Air floatation water treatment device and treatment method thereof

Abstract

The invention relates to an air flotation water treatment device and a treatment method thereof. The device integrates coagulation, flocculation and flotation. Comprising a coagulation reaction area, a flocculation reaction area, a flocculation turbulent flow area, a flow guide area, a bubble adhesion area, a solid-liquid separation area, a sludge discharge channel, a purified water flow guide channel, a water outlet channel, a coagulation reaction area stirrer, a weir plate, a flocculation turbulent flow area partition plate, a micron aerator, a purified water flow guide channel diversion turbulent flow plate, a flow guide wall, a mud scraper and a high-position mud outlet weir. By adopting the flocculation turbulent flow area partition plate and the micron aerator, the power consumption is saved by 70-85%, and the operation cost is reduced; a hollow fiber membrane of PTFE composite ceramic particles is adopted for aeration, the suspended matter removal rate is 90-99%, the effluent turbidity is smaller than or equal to 4 NTU, and the air flotation turbidity removal treatment effect is good; the hollow fiber membrane of the PTFE composite ceramic particles is a high-strength flexible membrane and can be disturbed along with water flow scouring, so that the micron aerator is prevented from being polluted and blocked; the aeration mode is continuous stable-pressure aeration and can be started and stopped at any time, and the service life of equipment is not affected.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an air flotation water treatment device and a treatment method thereof. Background technique [0002] Air flotation is a kind of purified water in which a large number of highly dispersed tiny air bubbles are passed into the water body to make them adhere to the light colloids in the water to form scum with a specific gravity smaller than that of water and float on the water surface, thereby performing solid-liquid separation. method. The key points that affect the treatment effect of the air flotation process are the bubble state and flow pattern design. [0003] According to the principle of bubble generation, it can be divided into electrolytic flotation process, pressurized dissolved gas decompression air flotation process, dispersed air flotation process, etc. The electrolytic air flotation process mainly uses the electrolysis reaction on both sides of the electro...

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Problems solved by technology

[0007] 2. The pressure release device is a vulnerable part due to pressure changes

The types and specifications of the fillers in the filler-type dissolved air tanks are different. When the turbidity of the influent water is high, it is easy to cause the fillers to block and reduce the air-dissolving efficiency of the equipment. In the initial stage of the air flotation process, there are many impurities in the water, which will cause sediment in the dissolved air-water pipeline. More deposits can clog the releaser

[0008] 3. The structural design of the air flotation pool, the turbulent flow in the pool will affect the size of the bubbles and the effect of air flotation treatment

[0009] 4. If the use time of the air flotation equipment is not continuous and the idle period is long, if it is not cleaned properly, it will cause corrosion on the inner wall of the dissolved air tank and the dissolved air pipeline; the air compressor will open and close frequently with the fluctuation of the pressure of the surge tank, and the equipment will be lost larger

[0010] 5. Conventional microporous aeration is limited by the aeration pore diameter above micron, and the bubbles generated are generally of millimeter level, and the bubbles coalesce and rupture seriously, and the flotation effect is poor

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