High-efficiency vertical flowing type water treatment flotation tank

Abstract

The invention provides a high-efficiency vertical flowing type water treatment flotation tank which comprises a tank body, a first circular partition, a second circular partition, a third circular partition, a collision contact chamber, an adhesion contact chamber, a flotation separation chamber and a diversion effluent water chamber, wherein the collision contact chamber and the adhesion contact chamber are communicated through a clearance between the bottom of the first circular partition and a tank bottom, a diversion plate is arranged on the upper part of the second circular partition, the flotation separation chamber and the diversion effluent water chamber are communicated through a clearance formed by the bottom of the third circular partition and the tank bottom, dissolved gas releasers are evenly distributed at the bottoms of the collision contact chamber and the adhesion contact chamber, a raw water inlet pipe orifice is formed in the upper part of the collision contact chamber, a diversion plate is arranged on the upper part of the first circular partition, the edge of the diversion plate on the upper part of the first circular partition is higher than that of the diversion plate on the upper part of the second circular partition, and a mechanical deslagging system is arranged above the floatation separation chamber. According to the high-efficiency vertical flowing type water treatment flotation tank, the water quality change risk resistance capability can be improved and large-scale production can be facilitated.

Description

technical field [0001] The invention relates to a vertical flow water treatment air flotation tank. Background technique [0002] Air flotation, as an efficient and fast solid-liquid separation technology, started from ore dressing flotation technology. It is to introduce a large number of dense micro-bubbles into the water to make them adhere to impurities and flocs to form a flotation whose overall specific gravity is smaller than that of water. Floating body, and rely on buoyancy to make it float to the water surface, so as to complete the solid and separated water purification technology. Initially, this technology was mainly used for the removal of fat, oil, fiber, grease and other substances with a density less than water. In the late 1960s, this technology was promoted in sewage treatment and drinking water treatment. It has been widely used in oil refining, In the treatment of papermaking, printing and dyeing, electric power, chemical industry, textile, leather, f...

AI Technical Summary

Problems solved by technology

In the countercurrent process, the microbubbles and suspended solids can effectively collide, and the adhesion process does not require too much flow power. However, since the raw water flows downward and is in a turbulent state, the hydrodynamic force is large, and the microbubbles and suspended solids after the collision cannot Good adhesion to form stable foam flocs or desorption under the countercurrent of raw water after adhesion, resulting in the failure of the foam flocs to complete the floating separation process well, and the phenomenon of "running alum"

The countercurrent air flotation process is not very adaptable to changes in raw water quality and surface loads. As the operation progresses, the water purification effect becomes worse. It is often achieved by increasing the reflux ratio, increasing the concentration of microbubbles, or increasing the depth of the air flotation tank. Good water quality, but this practice is extremely energy-intensive and not economically efficient

[0005]The existing air flotation device only has a first-level contact chamber, which does not distinguish between collision and adhesion, which leads to poor effect of air flotation and water discharge. The depth of the floating pool is large, the flocs formed are prone to desorption, the adhesion efficiency of micro-bubbles and suspended particles in the water is not high, and the water purification effect is not good

In addition, because the foam and floc are greatly affected by hydraulic impact, desorption is easy to occur in long-distance diffusion, which makes the purified water quality deteriorate again, which limits the overall length of the adhesion contact chamber and the air flotation separation chamber, making it difficult for the advection air flotation tank to Large-scale

Dissolved air releasers in large-scale dissolved air flotation tanks are easy to block, and the blockage of individual dissolved air releasers will affect the overall air flotation effect, so there are few examples of large-scale dissolved air flotation running well

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