Submersible aerator impeller

Abstract

The invention relates to a submersible aerator impeller, which comprises a wind impeller and a water impeller, wherein a wind impeller outlet is welded with an arc-shaped baffle of the wind impeller outlet, and oblique conical air vents are evenly arranged on the baffle; the oblique hole diameter of the air vents close to the inner side of the wind impeller outlet is greater than that of the air vents close to the outer side of the wind impeller outlet, and the oblique direction of the air vents is the same as that of the middle streamline of a blade of the wind impeller. Air flows to a buffer chamber from the air vents in a jet way, and is cut into micro air bubbles under the action of the water impeller so as to allow the degree of turbulence of an air and water mixture in the buffer chamber to be more intense; and after air and water are fully mixed, the mixture is flushed into sewage from a diversion outlet at a high speed, and the generated air bubbles are finer and evener. The aeration efficiency is improved. When the submerging depth of a submersible aerator is less than 4m, the number of blades of the wind impeller and the water impeller are respectively two, and when the submerging depth of the submersible aerator is more than 4m, the number of blades of the wind impeller and the water impeller are respectively three.

Description

technical field [0001] The invention relates to a submersible aerator impeller used for sewage treatment. Background technique [0002] At present, domestic sewage and industrial wastewater in most countries are treated by activated sludge method, which requires a large amount of dissolved oxygen in the biochemical process of sewage treatment by activated sludge method. Aeration equipment is the most important and operating cost of sewage aerobic biological treatment system. highest equipment. Chinese patent 200820217554.7 discloses a double-impeller submerged aerator, including buoys, air inlet pipes, submersible motors, bellows, wind impellers, water impellers, impeller mouth rings, impeller outlet arc baffles and guides at the outlet of the wind impellers. Outlet; when working, the submersible motor drives the wind impeller and the water impeller to rotate at high speed. When the wind impeller rotates at high speed, the water in the air intake pipe and the bellows is suc...

AI Technical Summary

Problems solved by technology

However, after the air and water are mixed in the buffer chamber, the fragmentation effect is not ideal, resulting in a small contact area between the air and water, and the oxygen dissolution effect is not ideal. When the aerator dives deep (above 3m), it is easy to cause the aerator The negative pressure in the bellows is small, which reduces the air intake and reduces the efficiency of the aerator

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