Circular current dissolved air copolymerization flotation system and technology

Abstract

The invention discloses a circular current dissolved air copolymerization flotation system and a circular current dissolved air copolymerization flotation technology. The system mainly comprises a feeding pump, a jet pump, a doser, a gas-liquid mixing pump, a bubbling air dissolving tank and a flotation column. Because a gas-liquid mixing pump-bubbling air dissolving tank technology is adopted, the effluent index of dissolved air water is stable; the synchronous integration of medicine mixing and gas-solid-liquid three-phase coagulation copolymerization is realized by the jet pump, a coagulation technology unit does not need to be independently set, a flow is simplified, a stable gas-solid-liquid three-phase flocculating constituent can be generated, the floatation efficiency is improved, and the floatation effect is stabilized. A double-layer sleeve columnar floatation tank is adopted, so that a floor space is small, automatic control is easy to realized, coagulation copolymerization floatation can be realized, dissolved air energy consumption is lowered, the floatation efficiency is improved, the floatation technology process is simplified, and the automatic control is easy to realize. The circular current dissolved air copolymerization flotation system disclosed by the invention has the advantages of simple technology, no noise pollution, low energy consumption and good floatation effect.

Description

technical field [0001] The invention relates to a biomass air flotation separation and harvesting process, in particular to a circulating dissolved air copolymerization air flotation system and process suitable for the process of dissolved air flotation in the water treatment process or algae. Background technique [0002] Air flotation technology is an efficient and fast solid-liquid separation technology, which is widely used in water supply (especially raw water with low turbidity and high algae content), sewage treatment and other fields. With the development of algae, especially microalgae energy, this process will also have a good application prospect in the recovery process of algae biomass. According to the different manufacturing methods of microbubbles, the air flotation process can be divided into electrolytic air flotation, air distribution air flotation and dissolved air flotation, among which the dissolved air flotation method is the most widely used. [0003]...

AI Technical Summary

Problems solved by technology

Among them, the dissolved air system mostly adopts the air compressor-dissolved air tank method, which has high energy consumption (accounting for about 50% of the dissolved air flotation process), high noise, and the liquid level of the spray-packing type dissolved air tank is difficult to control. The effect is unstable; the flocculation system is operated independently. After flocculation, the flocs are sent to the contact area of ​​the air flotation tank, and the solid-liquid separation is carried out after adhering to the microbubbles. Stable, poor efficiency; at the same time, the overall process is complicated, the air flotation time is long, the floor area is large, the equipment cost is high, the operation is cumbersome, and it is difficult to realize automatic control

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