The vortex concave air flotation system is mainly used in the purification of industrial sewage in the papermaking, chemical industry, printing and dyeing, food, beer, pharmaceutical, slaughtering and other industries during the operation process. The vortex concave air flotation has no pressure vessel and air compressor , circulating pump and other equipment, so the equipment investment is less.

The vortex concave air flotation equipment occupies a small area, which can reduce its civil construction investment to a certain extent. The system saves power consumption because there is no pressure vessel, air compressor, circulating pump and other equipment. The energy consumption of the vortex concave air flotation system with Q=200m3/h is only 5.435KW, while the energy consumption of the dissolved air flotation system is as high as 65KW.

The concave air flotation can promote the oxidation of sulfide and reduce the sulfur content in sewage. Using it to treat the middle-stage wastewater of chemical pulping can greatly reduce the scale of biochemical secondary treatment (if waste paper is used as raw material, the wastewater generated by deinking, bleaching and other processes can be discharged or reused up to the standard without biochemical secondary treatment) equipment. It can even save the biochemical treatment process and directly meet the emission standards, thereby greatly reducing the overall investment cost.

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