Inverted umbrella shaped aerator

Abstract

The invention relates to improvement of an inverted umbrella shaped aerator and is characterized in that the inverted umbrella conical surface is cut into multiple slices, and the slices are distorted for an angle of 5-15 degrees into water in the same direction; the slices are distributed and still in the shape of an inverted umbrella, the function that the inverted umbrella shaped aerator generates negative pressure through rotational flow to carry air so as to achieve aeration and oxygenation is maintained, the inclined slices with small angles have double-flow function of horizontal plug flow and downward plug flow, thereby not only meeting the requirement of Carrousel oxidization ditch plug flow, but also replacing omitted plug flow impellers. Compared with the prior art, the inverted umbrella shaped aerator achieves triple effects of strengthening aerator effect, saving raw materials and reducing energy consumption, and has the advantages that oxygenated bubbles are finer, and dynamic efficiency can be improved by about 10%-12%, oxygenation capability can be improved by 15%-25%, and oxygenation water depth can be increased by 30%.

Description

technical field [0001] The invention is an improvement to the inverted umbrella aerator mainly used in the oxidation ditch of Carrousel, and particularly relates to an inverted umbrella aerator with light weight, large oxygenation depth, high oxygenation power efficiency and oxygenation capacity. Background technique [0002] Carrousel oxidation ditch is one of the urban sewage treatment processes. Its specific ditch type usually adopts a vertical axis shape like an inverted open umbrella-an inverted umbrella type surface aerator, such as the inverted umbrella described in Chinese patents CN2837298 and CN2878370. Umbrella aerator, as a push flow, mixing and oxygenation machine, also undertakes the functions of push flow, mixing and oxygenation. Its oxygenation is based on the vacuum suction principle of rotating liquid in fluid mechanics, and the entrainment effect of high-speed flowing liquid. Several blades on the impeller scrape and push the water to generate swirling flo...

AI Technical Summary

Problems solved by technology

However, because the actual oxygenation is still "suction, entrainment and entrainment" by stirring the water flow, although the gas-liquid mixing tube with suction holes is installed, because it is underwater, the actual amount of air inhaled by negative pressure is still limited, so the actual Increased oxygenation capacity is still limited

In addition, there is no pressure in the gas-liquid mixing pipe installed on the umbrella surface. When the machine is shut down or the speed is low, the sludge in the sewage is easy to enter and block the gas-liquid mixing pipe, resulting in loss of its function, so the actual increase effect is not significant.

[0005] Chinese patent CN101125709 is a new type of inverted umbrella-type impeller, which forms a louver structure by connecting adjacent blades with a number of stepped webs, and generates suction lifting force through high-speed rotation, which solves the problem of sludge deposition in the oxidation ditch problem, basically no effect on improving oxygenation

[0008] The above-mentioned prior art objectively shows that although the inverted umbrella aerator has been improved from multiple angles, and some oxygenation capacity and dissolved oxygen can be improved, the basic structure: inverted umbrella surface + blade structure remains unchanged, and Its self-heavy power consumption is large, and the dissolved oxygen is mixed in the shallow surface layer, and the dissolved oxygen is only on the shallow surface of the water body. The two major shortcomings have not been overcome.

Objectively speaking, when the surface dissolved oxygen reaches a certain value, it is difficult to increase the mixed dissolved oxygen on the surface. Therefore, the actual improvement of the oxygenation capacity is limited, the oxygenation power is basically not improved, and the situation of low oxygenation power efficiency has not been fundamentally changed. The aeration effect is still not very good. Usually in a large aeration tank, it is necessary to install multiple sets and push flow aeration in different directions at the same time to meet the oxygenation requirements, resulting in high energy consumption for treatment.

Shallow aeration depth, heavy weight, high energy consumption, and low power efficiency of oxygenation have become technical problems that have not been effectively solved for a long time

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