Micro-bubble generator for air floatation treatment of sewage

Abstract

The invention discloses a micro-bubble generator for air floatation treatment of sewage. The micro-bubble generator comprises a water cavity pipe and a micropore pipe; one end of the water cavity pipe is connected with the micropore pipe, and the other end of the water cavity pipe is a closed end; the side wall of the water cavity pipe is provided with an inlet water pipe; an air cavity pipe is sleeved outside the micropore pipe, and a closed air cavity is formed between the air cavity pipe and the micropore pipe; the side wall of the air cavity pipe is provided with an inlet air pipe; and an opening end of the micropore pipe is connected with an outlet pipe. When the micro-bubble generator is in use, the treatment water and the treatment air respectively enter the water cavity pipe and the air cavity pipe of the micro-bubble generator through the inlet water pipe and the inlet air pipe, micro bubbles can be formed by cutting the air through the micropore pipe and continuous scouring and shearing the air through the treatment water flow, and the formed micro bubbles are carried by the water flow to be discharged through the outlet pipe. Due to the adoption of the micro-bubble generator, sufficient micro bubbles with a uniform size can be effectively generated, and the requirement of the air floatation purification process can be completely met; and the trouble for clearing the foreign matters in the treatment water blocking the micropore pipe can be avoided, the micro-bubble generator can be operated stably for a long time, no rotating part exists, and simplicity in use, installation, maintenance and repairing can be realized.

Description

technical field [0001] The invention relates to a fine bubble generator for sewage air flotation treatment. Background technique [0002] The air flotation water treatment process is to try to generate a sufficient number of fine air bubbles of uniform size in the raw water (sometimes adding a flotation agent together), and to make the oil particles, suspended solids (SS) and other pollutants in the raw water stick to the air bubbles. Attached, and then rise to the water surface with the help of buoyancy, and achieve the purpose of water purification by collecting foam scum. According to the different ways of micro-bubble generation, air flotation technology can be divided into pressurized dissolved air flotation (Dissolved gas flotation, DGF), multiphase dissolved air pump flotation, induced gas flotation (Induced Gas Flotation, IGF), electrolytic air flotation, etc. At present, pressurized dissolved air flotation and induced air flotation are widely used in municipal sewa...

AI Technical Summary

Problems solved by technology

However, the particle size of the generated microbubbles is large, and its efficiency is greatly affected by the outlet aperture of the ejector or high-speed Venturi tube. The requirements for water quality and pressure entering the nozzle are relatively strict, and small fluctuations may have a greater impact on the purification efficiency. big impact

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