Spiral aeration method and spiral aeration tank

Abstract

The invention discloses a spiral aeration method and a spiral aeration tank. According to the method, a plurality of jet aeration devices are used for aeration together, jet exits of the jet aeration devices are distributed along a certain circumference; each jet exit direction and the radial direction form an included angle; sewage in the aeration tank forms a rotational flow, and the integral flow field spirally rises; and the sewage is aerated and flows out through a water outlet of the aeration tank. The aeration method increases the sewage flow paths in the aeration process, increases the gas / liquid-phase contact area, and increases the total transfer coefficient of aeration tank oxygen. By using the aeration method, the partial dead water region is reduced due to the more uniform flow distribution, thereby increasing the effective aeration region, enhancing the aeration efficiency, enhancing the volume utilization ratio of the aeration tank, and saving the occupied space. The spiral-rise jet aeration method can enhance the oxygen utilization ratio, so that the spiral aeration tank has the advantages of strong aeration effect, simple structure, high reaction efficiency, small occupied area and low cost.

Description

technical field [0001] The invention relates to the technical field of applied aeration technology, in particular to a spiral aeration method and a spiral aeration tank. Background technique [0002] With the continuous development of my country's industry, the national sewage discharge is also increasing year by year, most of which are directly discharged into rivers and lakes without treatment, resulting in increasingly prominent water pollution problems. For the sustainable development of the environment, the country pays more and more attention to the purification of sewage. In 2011, the national "863" plan put forward the research plan of "recycling technology of carbon source and nitrogen, phosphorus and sulfur components in sewage" in the field of resource and environmental technology. In the national "973" plan, "regional environmental quality evolution and pollution Control" has been listed as a key research direction. [0003] In sewage treatment, the world's dev...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of traditional aeration tanks such as low reaction efficiency, low gas holdup, poor mixing uniformity, low oxygen utilization rate, and large floor area, and provide a method to improve the reaction efficiency of the sludge treatment system and improve the oxygen utilization. rate and aeration effect, the spiral aeration method of reducing the floor area and the spiral aeration tank using this method

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