Internal component for strengthening refining wastewater biochemical mixed mass transfer reaction process

Abstract

The invention relates to an internal component for strengthening a refining wastewater biochemical mixing mass transfer reaction process. The internal component comprises a barrel body and a water and gas distribution structure. The internal component is characterized in that the water and gas distribution internal component mainly comprises a transmission internal component and a mass transfer internal component. The transmission internal component is composed of a hydraulic lifting device, a central circulating cylinder and a water distributor; and the mass transfer internal component is composed of an auxiliary cylinder and a pressure air releaser. The internal component can realize gas-liquid-solid high-strength mixing, has the characteristics of uniform mixing, high mass transfer rate and high oxygen dissolving efficiency, can adjust the radius of reflux circulating water, remarkably strengthens the mixing and mass transfer effects of biochemical reaction, shortens the hydraulic retention time, can be used for a deep water biochemical device, and reduces the occupied area of the biochemical device.

Description

technical field [0001] The invention belongs to the field of waste water treatment and relates to an internal component for strengthening the biochemical mixed mass transfer reaction process of refinery waste water. Background technique [0002] At present, the wastewater treatment of refining and chemical enterprises basically consists of physical and chemical pretreatment such as oil separation and air flotation, biochemical main treatment, and terminal advanced oxidation advanced treatment. Among them, biochemical, especially aerobic biochemical treatment process is the main process for removing pollutants in refining and chemical wastewater. . To achieve a good treatment effect in aerobic biochemistry, it is necessary to achieve full contact between sludge and wastewater through mud-water mixing, and to ensure the concentration of dissolved oxygen in wastewater through aeration. The current biochemical treatment process for refining and chemical wastewater is basically ...

AI Technical Summary

Problems solved by technology

[0003] 1. The mixing is not complete and there is a dead angle

The mixing of muddy water and air-water in the biochemical tank is achieved through aeration. The rise of air bubbles drives the surrounding muddy water to flow upwards and become fluidized. However, this flow state cannot achieve complete mixing of muddy water, and there is an aeration dead angle.

[0004] 2. Low oxygen mass transfer and utilization

The bubbles coming out of the aeration system will quickly gather and grow up, and the bubbles will rise faster due to the larger diameter, resulting in small surface area and short residence time of the bubbles, low oxygen transfer rate, and poor mass transfer effect.

In addition, due to the incomplete mixing of mud and water, and the shear force of the water flow is also small, the sludge flocs are large, and the mud water inside the sludge flocs is not very sufficient, so the utilization rate of dissolved oxygen in the water is also reduced by the sludge.

[0005] Incomplete mixing and problems of oxygen mass transfer and utilization will affect the effect and stability of biochemical treatment of refinery wastewater

To solve these problems, it can only be realized by increasing the water distribution and air distribution pipes in the pool and increasing the air supply volume of the fan, etc., but this does not solve the problems of dead angle, uneven mixing, low dissolved oxygen efficiency, and poor mass transfer efficiency in essence. problems, and increased investment costs and operating energy consumption

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