A reverse flow air flotation device

Abstract

The invention discloses a rotary flow air floatation device, comprising a horizontal cylinder and air dissolution equipment, wherein the cylinder is of a closed structure with an inspection manhole, water inlet / outlet pipeline joints, air inlet / outlet pipeline joints and a deslagging pipeline joint; the inside of the cylinder is divided into a coagulation reaction chamber, a plurality of separation chambers and a dross / clear water chamber by transverse partition boards, the section of each of the chambers is divided into a shape shown in the specification by a vertical partition board, the air dissolution equipment is an air dissolution pump and releasers, the external air dissolution pump pumps treated sewage from the lower part of the dross / clear water chamber and sucks gas from the liquid level and sends the treated sewage and the gas which are pressurized into the separation chambers, gas dissolved in water is released by the releaser under the reduced pressure, the coagulation reaction chamber is provided with a sewage inlet, and a purified sewage outlet is arranged at the bottom of the dross / clear water chamber. The rotary flow air floatation device has a multi-stage separation effect, is high in purification degree, and is safe and environmentally friendly substantially; in addition, the rotary flow air floatation device can run under pressure, thereby reducing inter-stage lift and saving energy; moreover, the device occupies a small area.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a reverse flow air flotation device. Background technique [0002] The air flotation device is a sewage treatment equipment for liquid-solid and liquid-liquid separation. [0003] Traditional air flotation is that sewage is dissolved into air under pressure, and the dissolved air is released under reduced pressure in the separation tank. The fine bubbles released during the decompression process are used to absorb and carry solid and liquid impurities in the water to rise and be removed. The so-called separation pool is generally an open gravity flow pool body, or an advection rectangular long pool, or a circular radial flow pool body. The so-called decompression and release of dissolved gas is to use the property that the solubility of gas in water is proportional to the pressure, and release the water mixed with air under pressure (usually 0.3-0.5MPa) in the...

AI Technical Summary

Problems solved by technology

[0004] The extent to which solid and liquid impurities rise and be removed is related to the water flow velocity and the rising distance. To obtain deep purification, a larger equipment footprint and space are required.

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