Method and device for treating polymer-containing sewage by using high-gradient agglomerated air floatation

Abstract

A device for treating polymer-containing sewage by using high-gradient agglomerated air floatation comprises a high-gradient agglomerated air floatation chamber, an agglomerated chamber, an agglomerated air floatation chamber and a separation chamber; the agglomerated chamber is arranged at the upper part of the one-fourth part of the periphery of the high-gradient agglomerated air floatation chamber; the high-gradient agglomerated air floatation chamber is provided with an oil-collecting horn inside and a water distribution port in the inner-middle part of the high-gradient agglomerated air floatation chamber; a communicating pipe is arranged between the bottom of an arc groove and the middle of the agglomerated air floatation chamber; the agglomerated air floatation chamber is cylindrical and is vertically arranged in the center of a tank body; an annular oil-collecting groove is arranged on the periphery of the upper part of a cylinder; water distribution holes of a separating areaare arranged at the periphery of the lower part of the oil-collecting groove; a water inlet pipe of an annular gas-dissolved water distributed pipe is arranged at the lower-middle part of the oil-collecting groove and is connected with a gas-dissolved water preparation device outside the tank body; and the separating chamber, surrounding the agglomerated air floatation chamber, comprises a cylindrical water-collecting chamber arranged at the bottom lower part of the agglomerated air floatation chamber, an annular water groove surrounding the tank body, a mud-collecting cavity arranged in the center of the water-collecting chamber, mud-collecting pipes extending outwards uniformly from the lower part of the mud-collecting cavity, mud-holding pipes extending out of the tank body from the center of the mud-collecting cavity, a water reflow pipe led outwards from the water-collecting chamber and an arc water outlet weir box arranged at the upper part of the circumference of the tank body.

Description

1. Technical field [0001] The invention relates to an air flotation tank for treating sewage containing polymers from three mines, in particular to a method and device for treating sewage containing polymers by high-gradient coalescence air flotation. 2. Background technology [0002] At present, there are technical bottlenecks in the treatment process of polymer-containing sewage in oilfields. For example, on DNF, the two-stage air flotation treatment method is prone to produce aging oil, which is easy to increase the corrosion of equipment, and the amount of sludge and oil content increases the difficulty of treatment. . 3. Contents of the invention [0003] The object of the present invention is to provide a high-gradient coalescence air flotation treatment method for poly-containing sewage, which overcomes the above-mentioned defects in the prior art. [0004] Technical scheme of the present invention is realized in the following manner: [0005] The present inventio...

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Problems solved by technology

[0002] At present, there are technical bottlenecks in the treatment process of polymer-containing sewage in oilfields. For example, on DNF, the two-stage air flotation treatment method is prone to produce aging oil, which is easy to increase the corrosion of equipment, and the amount of sludge and oil content increases the difficulty of treatment.

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