Inverted umbrella-shaped aeration machine

Abstract

The invention relates to improvement on an inverted umbrella-shaped aeration machine of a surface aeration apparatus for sewage treatment. The inverted umbrella-shaped aeration machine is characterized in that a rotary shaft is in a hollow structure, and at least the aeration is carried out in the water through an air distributing tube or a micropore aeration device in a terminal area, so that the inverted umbrella-shaped aeration machine is oxygenated by the swathed air generating whirl through rotation and oxygenates water by more air forcibly injected air, and the injected air is rotated through an impeller to stir and cut bubbles aerated into the water, particularly, the bubbles are cut through a sawtooth to ensure that the bubbles are finer to form micro-bubbles, thereby greatly improving the oxygenate capacity and the dissolved oxygen concentration of the inverted umbrella-shaped aeration machine and the deep oxygenation of the water body.

Description

technical field [0001] The present invention is an improvement to the surface aeration equipment used for sewage treatment such as Carrousel oxidation ditch - the inverted umbrella aerator, especially relates to a blowing and oxygenation mixed type inverted umbrella aerator capable of relatively high 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 umbrella-an inverted umbrella surface aerator, which is used as a push flow, mixing and oxygenation mechanism. , At the same time undertake the functions of pushing 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 flow, entraining air to oxygenate the water. Because onl...

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.

[0004] Chinese Patent CN101125709 discloses a new type of inverted umbrella impeller, which forms a louver structure by connecting adjacent blades with a number of stepped webs. The rotation generates suction lifting force, which solves the problem of sludge deposition in the oxidation ditch, and basically has no effect on improving oxygenation

[0005] Therefore, although the existing inverted umbrella aerators have different improvements, they have not changed the actual principle of oxygenation, and oxygenation still only relies on swirl to generate negative pressure Air is entrained, and dissolved oxygen is mixed for the surface shallow layer. When the surface dissolved oxygen reaches a certain value, it is difficult to increase, and the situation of low oxygenation efficiency has not been fundamentally changed. In a larger aeration tank, it is necessary to install multiple sets of push-flow aeration in different directions at the same time to meet the oxygenation requirements, and the energy consumption is high, which is a technical problem that has not been effectively solved for a long time by the inverted umbrella aerator.

Images