Full-automatic dissolved air floatation device

Abstract

The invention relates to a full-automatic dissolved air floatation device which comprises an air floatation box body, a regulation weir, a water inlet, a water outlet, a sewage outfall, a dissolved air tank, a mud scraper and a slag collection groove, wherein the mud scraper is arranged at the upper part of the air floatation box body; the dissolved air floatation device further comprises a dissolved air pump and a water receiving and air removal system; the dissolved air pump is arranged on the outer side of the lower part of the air floatation box body; one end of the dissolved air pump is connected with the dissolved air tank, and the other end of the dissolved air pump is connected with a reflux pipe and communicated with the inner part of the air floatation box body; and the water receiving and air removal system is arranged at the lower part of the air floatation box body and connected with the regulation weir. The full-automatic dissolved air floatation device improved on the basis of a traditional dissolved air floatation device has the advantages that the dissolved air pump is adopted by the air floatation device to replace a pressure pump, an air compressor, a jet device, a high pressure dissolved air tank, an air-water mixer, a release head, and the like of the traditional device, so that the problems of complex system, operation instability and large air bubble overturn of the traditional device are overcome; and the reflux pipeline is scientifically arranged at the inner part of the equipment, and the internal water receiving and air removal system is additionally arranged, so that air bubble entrainment of outlet water, which influences subsequent treatment, is avoided.

Description

technical field [0001] The invention relates to a treatment device for urban sewage and industrial waste water, in particular to a fully automatic dissolved air flotation device. Background technique [0002] Dissolved air flotation can be divided into two types: vacuum air flotation method and pressure dissolved air flotation method according to the different pressures when the bubbles are separated from the water. The former utilizes vacuum to dissolve air under normal pressure or increased pressure, and then releases microbubbles under negative pressure for use in air flotation; the latter uses forced air to dissolve in water under increased pressure, and then suddenly depressurizes. The dissolved gas is released from the water, adheres to the flocs in the form of micro-bubbles, and floats together. [0003] Although the vacuum type air flotation tank has low energy consumption, the formation of bubbles and the adhesion of bubbles and flocs are relatively stable; but the...

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Problems solved by technology

[0007] The present invention is improved on the basis of traditional dissolved air flotation. The air flotation device adopts dissolved air pump to replace traditional booster pump, air compressor, jet, high-pressure dissolved air tank, air-water mixer and release head, etc., to overcome the traditional The device system is complicated, the operation is unstable, and the problems of large bubbles are tumbling. The return pipeline is scientifically installed inside the equipment, and the internal water collection and degassing system is added to avoid entrainment of air bubbles in the effluent, which will affect the subsequent treatment.

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