A high-efficiency centrifugal submersible aerator

Abstract

The invention relates to sewage treatment equipment, particularly relates to a centrifugal submerged aerator and aims at providing an efficient centrifugal submerged aerator which is reliable in operation. According to the submerged aerator, a drive shaft of a submerged motor is connected with an impeller positioned in an inner cavity of an aeration disc; the upper end of the aeration disc is provided with an air inlet, and the lower end of the aeration disc is provided with a water inlet; the periphery of the aeration disc is provided with a runner capable of discharging water-gas mixtures into water. The efficient centrifugal submerged aerator is characterized in that the runner at the periphery of the aeration disc is arranged in a downward oblique manner; the outlet of the runner is connected with multiple spray pipes; the multiple spray pipes are regularly arranged around the periphery of the aeration disc according to the length; the inner cavities, through which fluid flows, of the spray pipes are in a reducing shape. The submerged motor is arranged below the aeration disc. By virtue of adopting the technical scheme, the runner in the aeration disc inclines downward instead of being horizontal, so that the sprayed water-gas mixture fluid is capable of stirring sludge on a pond and preventing sludge from being settled.

Description

technical field [0001] The invention relates to sewage treatment equipment, in particular to a centrifugal submersible aerator. Background technique [0002] The centrifugal submersible aerator is a special equipment for aerating and oxygenating the water body in the water treatment process. Its working principle is: the transmission shaft of the submersible motor directly drives the semi-open impeller built in the aeration disc to rotate at high speed, and high pressure is generated under the action of the centrifugal force of the rotating impeller, and the air and water are respectively fed from the upper and lower ends of the aeration disc. The mouth is sucked; the impeller communicates with the air inlet pipe leading to the water, and introduces air. There are multiple flow channels around the aeration plate. The water and air mixture enters the flow channel and is fully mixed, then sprays out at high speed in the radial direction from the outlet, and spreads rapidly to...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of these two structures are: when the high-speed air passes through the pipe elbow or the air chamber, additional resistance will be generated, which will cause the loss of the negative pressure head of the intake air, reduce the intake air volume, and reduce the aeration efficiency of the aerator.

However, since the injection pipe will cause the fluid in the pipe to leak out, and the reduction of fluid pressure and flow velocity will directly lead to the reduction of turbulence effect; so this technology is theoretically feasible, but the actual effect is not worth the candle.

Moreover, the air bubbles near the outer end of the jet pipe will obviously merge and overflow the water surface, losing the ability to oxygenate the water body.

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