Pressurized dissolved air vessel

Abstract

The invention discloses an ejection swirl pressurized dissolved air vessel applied to a shallow air floatation machine for sewage treatment. The ejection swirl pressurized air dissolving device comprises an external ejector and a dissolved air vessel with a swirl baffle inside, and is characterized in that the ejector is arranged outside the dissolved air vessel, an outlet of the ejector is tangentially connected with the dissolved air vessel, and the swirl baffle is arranged in the dissolved air vessel, so that air dissolved water sprayed by the ejector forms swirl flow in the dissolved air vessel, and a 1 / 2-1 / 4 air chamber is formed in the dissolved air vessel. The dissolved air vessel is connected with an air compressor and connected with a suction port of the ejector, an ejection waterport of the ejector is connected with an outlet of a water pump for providing return clean water for the shallow air floatation machine, an air dissolved water outlet is formed in the dissolved air vessel and connected with a dissolved air release valve. High-pressure air dissolved water is decompressed by the dissolved air release valve, and air dissolved water containing a large number of micron-sized small bubbles is formed and used for the shallow air floatation machine. Air pressure in the dissolved air vessel is controlled to be 0.2-0.6 MPa, ejection water of the ejector is used for providing the shallow air floatation machine with the return clean water by the water pump, pressure of the ejection water is higher than air pressure in the dissolved air vessel by 0.1-0.3 MPa, and flowis 15%-60% of that of raw water of the shallow air floatation machine.

Description

Technical field [0001] The invention relates to the field of dissolved air flotation in environmental sewage treatment, and in particular to a high-efficiency dissolved air tank device with swirling flow in an external ejector tank. Background technique [0002] At present, a large amount of domestic sewage is treated by air flotation, and the dissolved air tank is one of the most widely used equipment in the air flotation process. The dissolving efficiency of the dissolved air tank will affect the dissolving effect of the entire air flotation machine; at present, The ejectors of the dissolved gas tanks on the market are all built-in. The dissolved gas tank has a large volume, and the release of large bubbles is uneven, and the air flotation effect is not optimal. Summary of the invention [0003] Aiming at the existing problems, the present invention discloses a jet cyclone pressurized air dissolving device, which reduces the volume of the air dissolving tank and improves the dis...

AI Technical Summary

Problems solved by technology

[0002] Now a large amount of domestic sewage is treated by the air flotation method, and the dissolved air tank is one of the most widely used equipment for the air flotation method. The dissolved air efficiency of the dissolved air tank will affect the dissolved air effect of the entire air flotation machine; at present, The injectors of the dissolved air tanks on the market are all built-in, the volume of the dissolved air tank is large, the release of large bubbles is uneven, and the air flotation effect is not optimal

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