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Efficient aeration oxygenation method and device through bubble suspension and bubble refining

A technology of air bubbles and aeration, applied in the field of water treatment, can solve the problems such as the inability to specify the migration and dissolution rate, and achieve the effects of solving the problem of fouling maintenance, improving the renewal speed, and prolonging the residence time of air bubbles

Active Publication Date: 2019-03-26
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the actual content of the gas in the water is less than this value, the gas migrates from the gas phase and dissolves into the water, and the di

Method used

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  • Efficient aeration oxygenation method and device through bubble suspension and bubble refining
  • Efficient aeration oxygenation method and device through bubble suspension and bubble refining
  • Efficient aeration oxygenation method and device through bubble suspension and bubble refining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment is carried out for the case of aeration and oxygenation with self-absorbed air at a low flow rate.

[0047] A gas initiator is installed on the water inlet pipe above the water surface, and a suspended bubble group generator is installed at the lower part of the vertical water inlet pipe below the water surface, and a bubble refiner is installed under the suspended bubble group generator. A thin tube reinforcement with a valve is installed at the center of the back of the refiner, and an outlet valve is installed on the horizontal outlet tube after the bubble refiner.

[0048] The water introduced by the external water inlet pipe is input into the vertical downpipe, and the air is sucked in by the gas initiator in the upper part of the downpipe, and the air is cut into small bubbles by the water flow and goes down the pipe, and the flow rate of the gas-liquid mixture generated in the pipe is 0.5m / s. The gas-liquid mixture flows through the suspended bub...

Embodiment 2

[0051] This embodiment is carried out in the case of increasing the flow rate of water and self-absorbing air for aeration and oxygenation.

[0052] A gas initiator is installed on the water inlet pipe above the water surface, and a suspended bubble group generator is installed at the lower part of the vertical water inlet pipe below the water surface, and a bubble refiner is installed under the suspended bubble group generator. A thin tube reinforcement with a valve is installed at the center of the back of the refiner, and an outlet valve is installed on the horizontal outlet tube after the bubble refiner.

[0053] The inlet water introduced by the locally installed power pump is input into the vertical downpipe, and the air is sucked in by the gas initiator at the upper part of the downpipe, and the air is cut into small bubbles by the water flow and goes down the pipe, and the gas-liquid mixture generated is in the pipe The flow velocity is 3m / s. The gas-liquid mixture fl...

Embodiment 3

[0056] This embodiment is carried out for the case where pure oxygen is used for high-concentration aeration and oxygenation.

[0057] A gas initiator is installed on the water inlet pipe above the water surface, and a suspended bubble group generator is installed at the lower part of the vertical water inlet pipe below the water surface, and a bubble refiner is installed under the suspended bubble group generator. A thin tube reinforcement with a valve is installed at the center of the back of the refiner, and an outlet valve is installed on the horizontal outlet tube after the bubble refiner.

[0058] The influent water introduced by the locally installed power pump is input into the vertical downpipe, and the gas initiator introduces pure oxygen gas under the pressure of 0.25MPa in the upper part of the downpipe, and the oxygen is sheared by the water flow into small bubbles and goes down the pipe to generate The flow velocity of the gas-liquid mixture in the pipe is 3m / s. ...

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Abstract

The invention discloses an efficient aeration oxygenation method and device through bubble suspension and bubble refining. The efficient aeration oxygenation method comprises the steps that on the water surface, entering water and air or oxygen and other gas go downwards along a vertical pipeline to be mixed, a formed gas-liquid mixture continues going downwards along the pipeline, successively passes through a suspended bubble group generator and a bubble refiner below the water surface, and then is discharged at the water bottom in the horizontal direction through an outlet valve, and finally, outlet bubbles conduct aeration oxygenation on a water body along an obliquely upward path. According to the efficient aeration oxygenation method, the gas-liquid contact area is increased, the bubble diameter is decreased, the bubble residence time is greatly prolonged, the oxygen dissolving efficiency is improved, the oxygen utilization rate is increased, and efficient aeration oxygenation onthe water body is realized; compared with a traditional microporous aeration method, microbubble generated by a large-diameter pipeline is adopted in the whole process for aeration, and the problemsof fouling plugging and maintenance of a traditional aeration head are solved thoroughly; the efficient aeration oxygenation method does not needs a fan and an air conveying pipeline, the equipment investment is low in cost, and mounting and maintenance are easy; and the efficient aeration oxygenation method and device are suitable for sewage treatment, black and smelly river body governance, reservoir lake water ecological restoration, aquaculture and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a high-efficiency aeration and oxygenation method and device. Background technique [0002] In the process of sewage treatment, black and odorous river body treatment, reservoir lake water ecological restoration, aquaculture, etc., it is often necessary to aerate the water body to fill it with oxygen. Aeration is a water treatment method in which water and air are in full contact to exchange gaseous substances and remove volatile substances in water, or to make gas escape from water, such as to remove the odor of water or harmful gases such as carbon dioxide and hydrogen sulfide; or to dissolve oxygen Into the water to increase the concentration of dissolved oxygen to achieve the purpose of removing iron and manganese or promoting the degradation of organic matter by aerobic microorganisms. [0003] As an important process link of the sewage aerobic biochemical treatment...

Claims

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Application Information

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IPC IPC(8): C02F7/00C02F3/02
CPCC02F3/02C02F7/00Y02W10/10
Inventor 杨庆峰
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI