Mixed-flowair-flotationwater purification method

Abstract

The invention relates to the technical field of air-flotationwater treatment, particularly to a mixed-flowair-flotationwater purification method. The method comprises the steps as follows: a flocculating agent is added into to-be-purified water which passes through a flocculating phase, the to-be-purified water enters a collision contact chamber, microbubbles and the to-be-purified water flow in opposite directions to finish full collision and adhesion of the microbubbles and suspended solids in the to-be-purified water; non-adheredand floating floccules or the suspended solids enter an adhesion contact room through a part, which is communicated with the bottom of the adhesion contact room, of the collision contact chamber, the microbubbles and the to-be-purified water flow and are contacted in same directions to finish an effective adhesion process, the bubble floccules float upwards, dregs are discharged, and a purification process is finished. The collision efficiency of the microbubbles and the suspended solids is greatly improved, the collection efficiency of particulate matters is greatly improved, theadaptability to changes of the raw water quality is significantly enhanced, and thedosage of the flocculating agent is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of air flotation water treatment, in particular to a mixed flow air flotation water purification method. Background technique [0002] As an efficient and fast solid-liquid separation technology, air flotation started from ore dressing flotation technology. It is a water purification technology that injects a large number of dense micro-bubbles into the water to make them adhere to impurities and flocs to form a floating body whose overall specific gravity is smaller than that of water, and rely on buoyancy to make it float to the water surface, thereby completing the solid and separated water purification technology. Initially, this technology was mainly used for the removal of various substances: such as fat, oil, fiber, grease and other substances with a density less than water. In the late 1960s, this process was promoted in sewage treatment and drinking water treatment. In the field of water supply t...

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Problems solved by technology

[0007] In order to solve the shortcomings of the traditional air flotation process and its devices in the above prior art, such as the effective adhesion efficiency of particles is not high, and the trapping effect is not good To solve these problems, the traditional advection and counter-flow air flotation tank contact chambers are improved, and a new type of mixed flow air flotation water purification method with good water purification effect and saving flocculants is provided.

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