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Dissolved air flotation gas-liquid mixing and screening device and dissolved air flotation system comprising same

A gas-liquid mixing and dissolved air flotation technology, which is used in flotation water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc. The effect of high gas content

Inactive Publication Date: 2018-06-19
CHINA NAT PETROLEUM CORP SAFETY & ENVIRONMENTAL TECH RES INST CO LTD +1
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Problems solved by technology

[0003] The present invention aims to provide a dissolved air flotation gas-liquid mixing and screening device and a dissolved air flotation system including the same, so as to solve the technical problem of large-volume bubbles remaining in the air flotation device in the prior art

Method used

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  • Dissolved air flotation gas-liquid mixing and screening device and dissolved air flotation system comprising same

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Embodiment 1

[0030] In this example, if figure 1 As shown, the tank body 2 of the dissolved air flotation gas-liquid mixing and screening device is a horizontal tank body, and a short-circuit 3 and a saddle support 10 at the bottom are provided outside the tank body 2 . A liquid level adjustment device 7 and a pressure relief valve 8 are provided in the short circuit 3, and a flange 4, a flange cover 6 and a flange gasket 5 are provided on the short circuit 3, and the flange cover 6 will connect the outlet N1 of the short circuit 3 seal. A water inlet pipeline 1 and a water outlet pipeline 9 are provided in the dissolved air flotation gas-liquid mixing and screening device, and a sewage outlet N4 and a bracket 10 are arranged at the bottom of the tank body 2 .

[0031] The water from the dissolved air flotation gas-liquid mixing and screening device enters the water inlet N2 of the water inlet pipeline 1 through the gas-liquid mixing pump, enters the tank body 2 through the water inlet pi...

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Abstract

The invention discloses a dissolved air flotation gas-liquid mixing and screening device and a dissolved air flotation system comprising the same. The dissolved air flotation gas-liquid mixing and screening device comprises a tank, a gas exhaust unit, a water inlet pipeline and a water outlet pipeline, wherein the gas exhaust unit is arranged at the top of the tank; the water inlet pipeline penetrates through the wall of the tank, and one end, located in the tank, of the water inlet pipeline is bent to face the gas exhaust unit; the water outlet pipeline penetrates through the wall of the tank, and the port of one end, located in the tank, of the water outlet pipeline is lower than the port of one end, located in the tank, of the water inlet pipeline. With the adoption of the technical scheme, a gas-liquid mixture discharged from the water outlet pipeline has the characteristics of high gas content, no large-particle bubbles and the like, when the gas-liquid mixture is released from the dissolved air flotation system, the bubble diameter is smaller than 30 mu m, oil droplets and solid particles in gas and liquids can be effectively adsorbed to float on the water surface, and thus,oil, solids and water are better separated.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a dissolved air flotation gas-liquid mixing and screening device and a dissolved air flotation system including the same. Background technique [0002] The principle of the traditional gas-liquid mixing device is to forcibly dissolve the gas in water through an air compressor or a gas-liquid mixing pump, and then release it into the air flotation device through a release device. However, due to problems such as local uneven pressure and large-volume air bubbles remaining in the process of forced pressurized gas-liquid mixing, the effect of air flotation separation is poor, which directly affects the effect of removing oil, suspended solids, iron, and sulfur ions in oily sewage treatment. It is difficult to meet the water quality requirements of oil field injection. Contents of the invention [0003] The present invention aims to provide a dissolved air flotation gas-l...

Claims

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Application Information

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IPC IPC(8): C02F1/24
CPCC02F1/24C02F2201/002
Inventor 杨忠平李颖李春晓秦磊王占生陈曦李秀敏云箭王薏涵
Owner CHINA NAT PETROLEUM CORP SAFETY & ENVIRONMENTAL TECH RES INST CO LTD
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