Tower-type dissolved air air-flotation machine

Abstract

The invention relates to a tower-type dissolved air air-flotation machine, which includes an air floatation reaction tank, a clear water tank, a scum tank, a scraping device, an air dissolving system,a bubble releaser, a static mixer, a stirring motor, an agitator, a spray head, an inlet pipe, an inlet, and an addition port. The air floatation reaction tank is provided with an inner cylinder, andthe inlet and the addition port are sequentially connected to the static mixer, and the inlet pipe and the spray head installed in the inner cylinder through a three-way joint. The agitator and the bubble releaser are installed at the bottom of the inner cylinder. Sewage water and microbubbles are subjected to reverse collision, stirred mixing, and adhesion in same direction in the inner cylinder, the interaction of microbubbles and particles is improved, and the adhesion of microbubbles is strengthened, the stability of a bubble flocculant body is enhanced, the collision efficiency of the microbubbles is significantly enhanced, and the ability to adapt to changes in the quality of the wastewater is significantly enhanced. The air flotation machine has the advantages of simple structure and less land occupation.

Description

technical field [0001] The invention relates to the field of sewage treatment equipment, in particular to a high-tower dissolved air flotation machine. Background technique [0002] With the influx of a large number of rural population into cities in our country, the urban population continues to increase, and the urban water resources have been severely damaged. Our country is facing the problem of water resource depletion. Water resources are the guarantee for human survival. It is a non-renewable resource. It not only affects people's production and life, but also has an important impact on my country's national conditions and national destiny. It can be seen that it is urgent to strengthen the urban sewage treatment work in our country. [0003] Dissolved air flotation technology is a solid-liquid separation technology, which has the characteristics of high processing efficiency, short start-up time and small footprint, and is widely used in the field of water treatment...

AI Technical Summary

Problems solved by technology

Bubbles and particles complete the collision and adhesion process in the contact chamber, the micro-bubbles flow in the same direction as the upwardly flowing sewage, the contact time between the bubbles and the suspended matter is short, and the adhesion effect of the bubbles is poor, especially when oil or suspended particles in the sewage More and loose flocs

[0005] The counter-current air flotation device generally has a single contact chamber, in which the upward micro-bubbles and the downward-flowing raw water flow in the opposite direction, and the descending suspended matter and the rising air bubbles are in reverse contact, so that the air bubbles and the suspended matter are adhered. The micro-bubbles and particles can complete the collision process very well, but due to the downward flow force of the raw water, the micro-bubbles and particles cannot adhere well to form a stable foam floc, or after the adhesion, the heterogeneous flow force of the raw water Under the action of desorption, the formed bubbles and flocs cannot complete the floating separation process well.

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