Totally-dissolved deep-layer air floatation combined device and sewage treatment method thereof

A sewage treatment method and dissolved air flotation technology, which can be applied in the direction of flotation water/sewage treatment, etc., can solve problems such as low viscosity, and achieve the effect of high density, good water transparency, and ensuring uniform stability.

Inactive Publication Date: 2010-06-30
上海百峰环保工程有限公司
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Problems solved by technology

Because the paper industry sewage water contains a lot of short fiber fluff, the specific gravity is light, the viscosity is relatively small, and it is easy to float, but it is very difficult to use it for other types of sewage

Method used

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  • Totally-dissolved deep-layer air floatation combined device and sewage treatment method thereof
  • Totally-dissolved deep-layer air floatation combined device and sewage treatment method thereof
  • Totally-dissolved deep-layer air floatation combined device and sewage treatment method thereof

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Embodiment Construction

[0024] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0025] Such as figure 1 As shown, a fully dissolved air deep air flotation device provided by the embodiment of the present invention includes a sewage tank 1, a dosing tank 2, a lift pump 13, a fully dissolved air flotation tank 4 and an air flotation tank, wherein the input of the lift pump 13 The ends are connected (connected) to the sewage pool 1 and the dosing tank 2 respectively, the output end of the lift pump is connected (connected) to the top of the fully dissolved air flotation tank 4, and the bottom of the fully dissolved air flotation tank 4 is provided with a drain valve 43, The lower part of the fully dissolved ...

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Abstract

The invention discloses a totally-dissolved deep-layer air flotation combined device and a sewage treatment method thereof, relating to the technical field of environmental protection and aiming at solving the technical problem of unstable air floatation effect of various air floatation processes so as to further effectively improve the air floatation effect. The combined device comprises a sewage tank, a drug feeding groove, a lifting pump, a totally-dissolved air floatation pot and an air floatation tank, wherein the air floatation tank with the depth of 6 to 9m, is divided into a releasing zone and a separating zone. The upper layer of the releasing zone is connected with a mud layer of the separating zone, the middle layer is a padding layer, and a releaser arranged at the lower layer is connected (communicated) with the lower part of the totally-dissolved air floatation pot by a pipeline; the upper part of the separating zone is the mud layer for discharging floating residues, a water discharging pipe arranged at the middle part is used for discharging treated water out of the air floatation tank, and a mud bucket zone arranged at the lower part is used for discharging sinking mud residues. The invention has the characteristics of stable air floatation, good effect, high COD, color and SS removing rate, good transparency of outgoing water and less drug feeding quantity.

Description

technical field [0001] The invention relates to environmental protection technology, in particular to a fully dissolved gas deep-layer air flotation combined device and a treatment method thereof in a sewage treatment process. Background technique [0002] The use of air flotation method for sewage water separation is based on Stokes' law: g(ρ s -ρ)d 2 On the basis of the / 18μ precipitation method, gas molecules are added, and the gas molecules are adsorbed on the suspended solids (SS) to reduce the specific gravity of the sludge, so that the SS rises and floats to achieve the separation of mud and water. This method was first used in mineral processing. Sewage flotation process. Later, it was gradually extended to a method in the physical and chemical treatment of sewage in all walks of life. [0003] The air flotation method currently used in sewage treatment can be divided into two major items. One is that the sewage, gas, and chemicals are all put into a dissolved air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/24
Inventor 周桂生周继伟
Owner 上海百峰环保工程有限公司
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