Sewage air flotation scum defoaming machine

Abstract

The invention relates to a sewage air flotation scum defoaming machine which comprises a motor, wherein the motor is connected with a rotating rod through a speed reducer and a coupler; the rotating rod is reversely T-shaped; a plurality of fixed vertical shafts are distributed on a transverse rod of the rotating rod; blades capable of rotating around the fixed vertical shafts are arranged on the fixed vertical shafts. The sewage air flotation scum defoaming machine can release air bubbles in scum in a horizontal direction and a vertical direction, so that the bubble breakage speed and the sinking speed of the scum are greatly increased, and the solid and liquid separation time is shortened; under the general condition, bubbles can be broken within 2-10 seconds according to the difference of the thicknesses of scum layers. Furthermore, full coverage for the scum layers is realized, and the scum in a large amount of water can be defoamed.

Description

technical field [0001] The invention relates to a sewage air flotation scum defoaming machine, which belongs to the technical field of sewage treatment. Background technique [0002] In sewage treatment technology, air flotation or chemical coagulation air flotation is a technology and equipment that are often used. There are many types of air flotation equipment, but no matter what kind of air flotation equipment, a layer of scum with different thicknesses will be formed on the water layer. Since there are a large number of tiny air bubbles in the scum besides pollutants and chemical coagulation flocs, when these air-floated scums are scraped out of the air flotation machine and entered into the air flotation scum storage tank, they will still float on the water surface. Difficult to sink. In order to solve this technical problem, people have proposed many methods, such as installing a low-speed blade mixer on the interface of the scum layer, and breaking the air bubbles ...

AI Technical Summary

Problems solved by technology

In order to solve this technical problem, people have proposed many methods, such as installing a low-speed blade mixer on the interface of the scum layer, and breaking the air bubbles in the air-floated scum by stirring to make the air-floated scum sink. However, this method is only suitable for small water volume and small liquid level.

In the case of a large amount of water and a large area of ​​liquid surface, it is difficult to increase the blade size of the mixer, and the operation is unstable if it is enlarged, and the foam breaking effect of the horizontal contact between the blade and the scum system is poor, so the scope of application of this method is limited.

In addition, there is a method of filtering air-floated scum. Due to the complex composition of scum, viscous and air bubbles, it is easy to block the filter material, and it is more difficult to remove the scum and filter material, and it is difficult to maintain long-term stable operation.

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