Rotational flow air flotation oil removal device

Abstract

The invention relates to a rotational flow air floatation oil removal device which is characterized by consisting of a rotational flow mixing reaction device and an air floatation device, wherein the rotational flow mixing reaction device consists of a water inlet booster pump, a first hose, a pipeline mixer, a second hose, a first cyclone, a third hose, a second cyclone, a fourth hose and a third cyclone; and the air flotation device consists of a fifth hose, a dissolved air release tank, a separation tank, a water outlet tank, a conical slag collecting tank, a slag falling pipe, a slag storage hopper, a sludge storage hopper, a slag scraper and a spiral sludge scraper. According to the rotational flow air flotation oil removal device, emulsified oil is demulsified in high-pressure inlet water through the cyclone, the demulsified emulsified oil and suspended solids are destabilized, coagulated and flocculated together, meanwhile, air dissolving is carried out, air-embedded light flocs are formed, the flocs can rapidly rise in the air flotation tank to form ultra-light floating residues after pressure relief, the flocculation effect of the device is good, the air dissolving efficiency is high, the water content of scum is low, dehydration is convenient, the device is compact, the occupied area is small, and the removal rate of emulsified oil, SS, particles and colloidal COD is high.

Description

technical field [0001] The invention relates to a technology for removing emulsified oil and other pollutants in water behind a grease trap in a sewage station, in particular to a swirl air flotation oil removal device. Background technique [0002] Traditional dissolved air flotation adopts vertical or horizontal dissolved air tanks to dissolve air, and adopts the method of dissolving air on the reflux of the effluent part, and releases microbubbles separately in the contact pool of the air flotation tank, and the contact and collision of microbubbles and flocs Low probability, low efficiency of dissolved air, high water content of scum, not easy to dehydrate, high content of emulsified oil, suspended solids, granular COD and granular BOD in the effluent (COD, Chemical Oxygen Demand, chemical oxygen demand; BOD, Biochemical Oxygen Demand, Biochemical Oxygen Demand or Biochemical Oxygen Demand). In addition, a large mixing tank and a flocculation tank must be installed in f...

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Problems solved by technology

[0004] Aiming at the problem of low gas-dissolving efficiency, the present invention adopts a plurality of small-scale cyclones connected in series to rotate under the drive of the rotary shaker, the water flow in the reactor rotates in a spiral shape at high speed, the gas-liquid interface is updated frequently, and the gas-dissolving efficiency is high

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