Graded dual-mode air flotation device

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a graded dual-mode air flotation device which comprises a first air flotation box, a second air flotation box is fixedly installed on the left portion of the first air flotation box, and a partition plate is fixedly installed between the first air flotation box and the second air flotation box. Through the arrangement of the partition plate, the first air flotation box and the second air flotation box are classified, firstly, a large number of bubbles generated by air in the first air flotation box are used for conducting air flotation on a large number of particles contained in waste water, the waste water is cleaned for the first time, and most heavy particles are removed; in the second air flotation box, an anode plate and a cathode column are used for electrolyzing the wastewater, tiny bubbles generated by electrolysis are used for air flotation and deep cleaning, two different bubble generation modes are combined for cleaning suspended matters in the wastewater, the energy consumption generated by electrolysis is reduced, and the suspended matter cleaning effect is improved; the air flotation device can meet the cleaning of wastewater with different concentrations.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a hierarchical dual-mode air flotation device. Background technique [0002] Air flotation equipment is a kind of air flotation device that passes through or generates a large number of fine air bubbles in water, so that the air is attached to the suspended solid particles in the form of highly dispersed micro air bubbles, resulting in a state of density lower than that of water, using the principle of buoyancy to make it float on the water surface, thereby Water treatment equipment that realizes solid-liquid separation is mostly used in wastewater treatment equipment. The air flotation equipment currently used has some shortcomings, as follows: [0003] First of all, if the air is directly passed into the wastewater through the pressurized equipment, but in the process, the air is not sufficiently broken, and the diameter of the formed bubbles is generally greater t...

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Problems solved by technology

[0003] First of all, if the air is directly passed into the wastewater through the pressurized equipment, but in the process, the air is not sufficiently broken, and the diameter of the formed bubbles is generally greater than 1000 nanometers, and the viscosity of the bubbles is relatively high. In the case of a certain air volume, the surface area of ​​the bubbles is small and the diameter is large, the floating speed is fast, the contact time between the microbubbles and the flocs is short, and the effect on the suspended solids in the wastewater is not good. Secondly, if electrolytic air flotation is used , although relying on electrolysis can produce smaller bubbles, the bubbles produced by the cathode and anode are limited, and the heavily polluted wastewater cannot be effectively removed. Larger, and on the cathode, metal ions often precipitate on it, causing the cathode rod to be covered, affecting the emission of air bubbles, and reducing the air flotation effect of the wastewater

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