Inverted-umbrella-shaped aerator

Abstract

The invention relates to a multifunctional surface aerator. The aerator is characterized in that long and short blades are distributed on the upper surface of an inverted-conical-surface body (7), the number of the long blades and the number of the short blades are even numbers, the height of the short blades is 1.1 times that of the long blades, the length of the short blades is half that of the inverted-conical-surface body, the length of the long blades is 1.1 times that of the inverted-conical-surface body, a certain included angle is formed between the outlet of the long blades and the inverted conical surface, the long blades are all distributed on the inverted conical surface and perpendicular to the inverted conical surface, and the short blades are evenly distributed on the inverted conical surface and one short blade is located between every two adjacent long blades. The long blade and short blade design form is adopted for the inverted umbrella blades, the plug-flow capacity of the aerator can be greatly improved, and the oxygen supply capacity of the aerator can not be influenced.

Description

technical field [0001] The invention relates to a multifunctional surface aerator, in particular to an inverted umbrella type aerator with strong push flow and stirring ability. Background technique [0002] The global water resource crisis is threatening the survival and development of human beings. Many countries and regions have made overall plans for sewage treatment to alleviate the tense situation of water resources. Oxidation ditch is an activated sludge treatment system. Because of its longer hydraulic retention time, lower organic load and longer sludge age, it has become the main process form of urban sewage and industrial wastewater treatment. As a mixing, aeration and oxygenation equipment, the inverted umbrella aerator, on the one hand, expands the impeller in a conical shape from bottom to top, forcing the sewage to circulate up and down, and promotes the uniform mixing of sewage and activated sludge; The rotating impeller throws the sewage into the air at a h...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN102120645A cuts the conical surface of the inverted umbrella into multiple slices, which not only retains the effect of the aerator generating negative pressure through the swirling flow to engulf the air to achieve aeration and oxygenation, but also slices have the dual functions of horizontal and downward push flow. Push flow effect, because slices are used instead of impellers, it can achieve three effects of enhancing aeration effect, saving raw materials, and saving energy. However, because slices are used instead of impellers, the push flow area cannot be guaranteed

[0004] Chinese patent CN104445593A, invented an axial-flow inverted umbrella aerator, adjusting the positioning screw according to the liquid level and medium characteristics, and realized the adjustment of the height and angle of the axial flow blades, thereby overcoming the problem of the existing inverted umbrella aerator. The oxygen process is limited to the surface of the water body, and the deep water body is lifted upward during the oxygenation process, which improves the efficiency of the aeration equipment and the amount of dissolved oxygen. However, for the aerator, it is necessary to have both push flow and aeration. This function, the patent only considers the aeration capacity and does not consider its pushing capacity

[0005] Chinese patent 101624232A, an inverted umbrella aerator, arranges air pipes or microporous aerators in the end area of ​​the shaft, and the impeller design has a sawtooth structure, thereby greatly improving the oxygenation capacity and dissolved oxygen concentration of the aerator, but Due to the sawtooth structure on the impeller, the push-flow stirring effect of this form of aerator is reduced

Images